Optical fiber passive stay wire longitudinal tear sensor and conveyor belt tear detection device

Abstract

The utility model relates to an optical fiber passive stay wire longitudinal tearing sensor and a conveyer belt tearing detection device, which comprise a shell, an optical switch, a guide sleeve and a pressing plate, a trigger rod is arranged in an inner hole of the guide sleeve in a sliding manner, a limiting table and a trigger plate are fixedly arranged on the trigger rod, the trigger plate is opposite to a trigger shaft of the optical switch, and a spring is arranged between the limiting table and the pressing plate; a placement groove is formed in the guide sleeve, a limiting ball located at the front end of the trigger rod is placed in the placement groove, a clamping groove corresponding to a front hemisphere of the limiting ball is formed in the inner side wall of the placement groove, and an elastic check ring for preventing the limiting ball from moving forwards is arranged in the clamping groove; and a pull wire is fixedly connected to the limiting ball. According to the utility model, the stay wire is used for blocking a puncture object penetrating through the conveying belt, when the puncture object impacts and pulls the stay wire, the stay wire pulls the limiting ball out of the placing groove and loses the limitation on the trigger rod, and the trigger rod drives the trigger plate to move and pushes the trigger shaft of the optical switch, so that the state change of the optical switch is triggered.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of conveyor belt detection sensor, especially relates to the tear detection of conveyor belt, and specifically refers to a kind of optical fiber passive guy wire longitudinal tear sensor and conveyor belt tear detection device. BACKGROUND

[0002] Conveyor belt is the main conveying part of belt conveyor, and the rotation of annular conveyor belt is used to convey materials, and the upper layer of conveyor belt is used as a bearing part to support and transport materials. Since the length of the conveyor belt is generally long, the material forms a longitudinal pile along the length of the conveyor belt, and the upper layer of the conveyor belt is in a trough shape with a low middle and high sides. After a long period of use, the conveyor belt is prone to longitudinal tearing. If the tear in the conveyor belt is not discovered in time, the tear will become larger, causing greater losses.

[0003] However, due to the coverage of the pile, the tear and the puncture object extending through the tear cannot be discovered in time in the early stage of the tear. Moreover, when the upper layer of the conveyor belt is transferred to the lower layer by the roller, even if the puncture object passes through the tear, the part of the puncture object extending downward will be pushed back by the roller, making it difficult to be discovered. In addition, the lower layer does not carry materials, and the conveyor belt itself has a certain elasticity, making it difficult for the staff to observe the tear defect in time. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of optical fiber passive guy wire longitudinal tear sensor and conveyor belt tear detection device to solve the problems of the prior art, which can discover the longitudinal tear of the conveyor belt in time and provide guarantee for the staff to take measures in time.

[0005] The utility model is realized by the following technical solutions, and provides a kind of optical fiber passive guy wire longitudinal tear sensor, which includes a shell and a light switch fixed in the shell, and further includes a guide sleeve fixedly connected with the shell, and a pressing plate fixedly arranged opposite to the guide sleeve, an inner hole of the guide sleeve is slidably provided with a trigger rod, a limiting table and a trigger plate are fixedly arranged on the trigger rod, the trigger plate is opposite to the trigger shaft of the light switch, and a spring for moving the trigger plate towards the trigger shaft of the light switch is arranged between the limiting table and the pressing plate;A placing groove is formed in the guide sleeve, a limiting ball located at the front end of the trigger rod is placed in the placing groove, and a clamping groove corresponding to the front hemisphere of the limiting ball is arranged on the inner side wall of the placing groove, and an elastic stop ring for blocking the forward movement of the limiting ball is arranged in the clamping groove;The limiting ball is fixedly connected with a guy wire.

[0006] In use, the pull wire is extended below the upper layer belt of the belt conveyor, and the end of the pull wire away from the limiting ball is fixed. When the conveyor belt is torn, the puncture object extends downward through the tear, and with the rotation of the conveyor belt, the part of the puncture object extending downward hits and pulls the pull wire, so that the limiting ball extrudes the elastic check ring and is detached from the clamping groove, losing the limiting effect on the trigger lever. The trigger lever moves under the action of the spring, and at the same time drives the trigger plate to push the trigger shaft of the light switch, thereby triggering the light switch.

[0007] As an optimization, two fixed rods are fixed on the guide sleeve respectively on both sides of the trigger lever, the fixed rods pass through the pressing plate, and an adjusting nut is threadedly connected to the fixed rod and located on the side of the pressing plate away from the spring. The optimization scheme sets the fixed rods, which not only facilitates the fixation of the pressing plate, but also adjusts the position of the pressing plate through the adjusting nut, thereby adjusting the pre-tightening force of the spring.

[0008] As an optimization, a sealing ring is sleeved on the trigger lever, and the trigger lever and the inner hole wall of the guide sleeve are sealed by the sealing ring. The optimization scheme seals the trigger lever and the inner hole wall of the guide sleeve by the sealing ring to prevent dust and other foreign matters from entering the shell.

[0009] As an optimization, a guide rod parallel to the trigger lever is fixed on the guide sleeve, and the guide rod passes through the trigger plate. The optimization scheme sets the guide rod to provide guidance for the movement of the trigger plate, so as to ensure the relative position between the trigger plate and the trigger shaft of the light switch, thereby ensuring the reliability of the trigger plate triggering the light switch.

[0010] The scheme also provides a conveyor belt tear detection device, which comprises the above-mentioned optical fiber passive pull wire longitudinal tear sensor, and the optical fiber passive pull wire longitudinal tear sensor is two pieces, the two optical fiber passive pull wire longitudinal tear sensors are respectively located on both sides in the width direction of the conveyor belt, the pull wires of the two optical fiber passive pull wire longitudinal tear sensors extend below the upper layer belt of the conveyor belt, and the pull wires of the two optical fiber passive pull wire longitudinal tear sensors are fixedly connected to form a tear trigger rope.

[0011] The conveyor belt tear detection device sets two optical fiber passive pull wire longitudinal tear sensors to detect the tear puncture object at the same time, and the pull wires of the two tear sensors are connected to form a trigger rope, which facilitates the setting of the two pull wires and makes the puncture object hit and pull the trigger rope, so that the light switches of the two optical fiber passive pull wire longitudinal tear sensors are triggered, thereby further improving the reliability of the tear detection.

[0012] As the optimization, two fixed sensor supports are further included, the housings of the two optical fiber passive pull wire longitudinal tear sensors are fixedly connected with the two sensor supports respectively, a tension spring is arranged on each of the two sensor supports, one end of the tension spring away from the sensor support is connected with the tear trigger rope, and the tear trigger rope is shaped to be adapted to the upper layer of the conveyor belt. The optimization is configured with the tension spring, so that the tear trigger rope is shaped to be adapted to the upper layer of the conveyor belt, the trigger rope is closer to the upper layer of the conveyor belt, the trigger rope can be more easily collided and pulled by the puncture object, and the reliability of the tear detection is further improved.

[0013] The utility model discloses the beneficial effects are: utilize the pull wire and block the puncture object of the conveyor belt, when puncture object hits and pulls the pull wire, the pull wire will limit ball from the placement groove, lose the limit of trigger rod, trigger rod drives trigger board to remove, to the trigger axle of light switch form push, thereby trigger light open light state change, convenient through the signal change of light switch judge conveyor belt tear, improved the puncture of conveyor belt after being discovered in time, be advantageous to take measures in time, reduce the loss. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the utility model optical fiber passive pull wire longitudinal tear sensor;

[0015] Figure 2 It is the side view of the utility model optical fiber passive pull wire longitudinal tear sensor;

[0016] Figure 3 It is the use state diagram of the utility model;

[0017] The drawings show:

[0018] 1, the shell, 2, light switch, 3, guide sleeve, 4, limit ball, 5, elastic baffle ring, 6, sealing ring, 7, trigger rod, 8, spring, 9, pressing plate, 10, guide rod, 11, trigger plate, 12, the trigger axle of light switch, 13, limit platform, 14, pull wire, 15, fixed rod, 16, adjusting nut, 21, optical fiber passive pull wire longitudinal tear sensor, 22, sensor support, 23, U-shaped bolt, 24, lower layer, 25, rack, 26, tension spring, 27, upper layer, 28, steel wire rope clamp. DETAILED DESCRIPTION

[0019] In order to clearly illustrate the technical features of the scheme, the following through specific embodiment, the scheme is described.

[0020] The optical fiber passive pull wire longitudinal tear sensor of the embodiment is applied to a belt conveyor, a ring-shaped conveyor belt is installed on a rack 25 of the belt conveyor, the conveyor belt rotates under the action of a roller to realize conveying of materials, an upper layer of the conveyor belt 27 is in a groove shape with a middle low and two sides high, and a lower layer of the conveyor belt 24 is in a planar shape.

[0021] In order to discover the tear problem of the conveyor belt in time, the embodiment provides an optical fiber passive pull wire longitudinal tear sensor as shown in Figure 1 and 2 The optical fiber passive pull wire longitudinal tear sensor comprises a shell 1 and an optical switch 2 fixed in the shell 1, the optical switch adopts the prior art, the optical switch can be triggered by pushing a trigger shaft of the optical switch, the optical switch is connected with a main controller to transmit a signal to the main controller, and the main controller outputs a corresponding signal according to the signal of the optical switch.

[0022] The optical fiber passive pull wire longitudinal tear sensor further comprises a guide sleeve 3 fixed to the shell 1 and a pressing plate 9 fixed opposite to the guide sleeve 3. The guide sleeve passes through one side wall of the shell and is fixedly connected with the side wall of the shell, an inner hole of the guide sleeve is slidably provided with a trigger rod 7, a limiting table 13 and a trigger plate 11 are fixed to the trigger rod 7, the trigger plate is opposite to a trigger shaft 12 of the optical switch, and the trigger rod moves to drive the trigger plate to move towards the trigger shaft of the optical switch and push the trigger shaft of the optical switch.

[0023] A spring 8 for moving the trigger plate towards the trigger shaft of the optical switch is arranged between the limiting table 13 and the pressing plate 9, the spring is sleeved on the trigger shaft, one end of the spring is abutted to the pressing plate, the other end of the spring is abutted to the limiting table, the trigger plate is fixed to a side of the limiting table away from the spring, and the spring is in a compressed state to form a pushing force on the limiting table when the conveyor belt is not torn, so that the trigger rod has a tendency to drive the trigger plate to move towards the trigger shaft of the optical switch.

[0024] A placing groove is arranged in the guide sleeve, the placing groove is located at a front side of the trigger rod and coaxial with the trigger rod, a limiting ball 4 located at a front end of the trigger rod 7 is placed in the placing groove, the front end of the trigger rod is abutted to the limiting ball, a clamping groove corresponding to a front half ball of the limiting ball is arranged on an inner side wall of the placing groove, and an elastic stop ring 5 for blocking the front movement of the limiting ball is arranged in the clamping groove. When the pull wire is not pulled, the elastic stop ring 5 is used to limit the limiting ball to avoid the limiting ball from being taken out of the placing groove, and the movement of the limiting rod is limited by the limiting ball to avoid the trigger plate from contacting the trigger shaft of the optical switch when no tear occurs. The elastic stop ring of the embodiment is a steel wire stop ring, the diameter of the steel wire stop ring increases when the limiting ball is pulled, and the limiting ball is taken out of the inner hole of the steel wire stop ring.

[0025] The limiting ball is fixedly connected with a pull wire 14, the pull wire extends to below the upper layer of the belt of the belt conveyor, and the end of the pull wire away from the limiting ball is fixedly arranged, when the puncture object on the belt passes through the pull wire, the pull wire is collided, and the pull wire is pulled along with the movement of the belt.

[0026] The guide sleeve 3 is fixedly provided with two fixed rods 15 located on the two sides of the trigger rod 7 respectively, the fixed rod 15 passes through the pressing plate 9, and the adjusting nut 16 located on the side of the pressing plate 9 away from the spring 8 is threadedly connected on the fixed rod 15, the position of the pressing plate on the trigger rod can be adjusted by screwing the adjusting nut, so that the compression length of the spring is adjusted, and the adjustment of the pre-tightening force of the spring is realized.

[0027] The trigger rod 7 is sleeved with the sealing ring 6, and the inner hole wall between the trigger rod 7 and the guide sleeve 3 is sealed through the sealing ring 6, so that dust and other sundries enter the inside of the shell, and the cleanliness of the space where the light switch is located is ensured.

[0028] In order to improve the reliability of the moving direction of the trigger plate and ensure that the trigger plate is in contact with the trigger shaft of the light switch, the guide rod 10 parallel to the trigger rod 7 is fixedly arranged on the guide sleeve 3, the guide rod 10 passes through the trigger plate 11, the trigger plate is provided with a through hole matched with the guide rod, the movement of the trigger plate is guided by the guide rod, and the rotation of the trigger rod around the axis is prevented.

[0029] The embodiment also provides a belt tearing detection device, as shown in the figure, Figure 3 The belt tearing detection device comprises the optical fiber passive pull wire longitudinal tearing sensor 21, and the optical fiber passive pull wire longitudinal tearing sensor 21 is two pieces, the two optical fiber passive pull wire longitudinal tearing sensors are located on the two sides in the width direction of the belt, the pull wires of the two optical fiber passive pull wire longitudinal tearing sensors extend to below the upper layer 27 of the belt, and the pull wires of the two optical fiber passive pull wire longitudinal tearing sensors are fixedly connected through the steel wire rope clamp 28, and the tearing trigger rope is formed.

[0030] In order to conveniently set the shape of the tearing trigger rope, the belt tearing detection device of the embodiment further comprises two fixedly arranged sensor supports 22, the housings of the two optical fiber passive pull wire longitudinal tearing sensors are fixedly connected with the two sensor supports 22 respectively, a tension spring 26 is arranged on each of the two sensor supports, one end of the tension spring 26 away from the sensor support is connected with the tearing trigger rope, the shape of the tearing trigger rope is matched with the upper layer belt 27 of the belt conveyor, and in the embodiment, the left, middle and right three sections of the tearing trigger rope are parallel to the left, middle and right three sections of the upper layer belt respectively. The lower end of the sensor support is fixedly provided with a flange plate, when being installed, the flange plate is supported on the rack of the belt conveyor, and the flange plate is fixedly connected with the rack by means of the U-shaped bolt 23. The housing 1 of the optical fiber passive pull wire longitudinal tearing sensor is fixed on the upper end of the sensor support by means of the bolt, and the pull wire extends out to the side where the belt is located.

[0031] In the use process of the embodiment, the optical fiber passive pull wire longitudinal tearing sensor is installed in front of the material falling point of the conveyor, when an object penetrates the upper layer belt of the belt conveyor, the object impacts the pull wire and pulls the pull wire along with the movement of the belt, under the action of the pulling force, the limiting ball extrudes the elastic retainer 5, the diameter of the elastic retainer 5 becomes larger, the limiting ball is extruded out of the placing groove of the guide sleeve 3, at this time, under the action of the spring 8, the trigger rod 7 drives the trigger plate to move downward, triggers the light switch, the light switch is turned off, a signal is transmitted to the main controller, the main controller outputs a corresponding signal, for example, an audible and visual alarm, or directly stops.

[0032] The optical fiber passive pull wire longitudinal tearing sensor has simple structure, is beneficial to manufacture and popularization, is arranged in a mode of opposite arrangement on the two sides, is reliable in action, has long service life, is good in sealing performance, and is suitable for working in various environments, the sensor is arranged in front of the material falling point of the conveyor, the tearing damage of the puncture object to the belt is greatly reduced, and economic loss is reduced.

[0033] Of course, the above description is not limited to the above examples, and the technical features not described in the utility model can be realized by or by means of the prior art, which will not be repeated here; the above embodiments and the drawings are only used to illustrate the technical scheme of the utility model and are not limited to the utility model, the preferred embodiments of the utility model are described in detail, and those skilled in the art should understand that the changes, modifications, additions or replacements made by those skilled in the art within the essential scope of the utility model do not deviate from the purpose of the utility model, and should also belong to the protection scope of the claims of the utility model.

Claims

1. An optical fibre passive guy wire longitudinal tear sensor comprising a housing (1) and an optical switch (2) secured within the housing (1), characterised in that: Further comprising a guide sleeve (3) fixedly connected with the shell (1), and a pressing plate (9) fixedly arranged opposite to the guide sleeve (3), an inner hole of the guide sleeve slidingly arranged with a trigger rod (7), the trigger rod (7) fixedly arranged with a limiting table (13) and a trigger plate (11), the trigger plate (11) opposite to a trigger shaft (12) of the light switch, and the limiting table (13) and the pressing plate (9) arranged with a spring (8) for pushing the trigger plate to move towards the trigger shaft of the light switch; The guide sleeve is arranged with a placing groove, the placing groove is arranged with a limiting ball (4) at a front end of the trigger rod (7), and an inner side wall of the placing groove is arranged with a clamping groove corresponding to a front hemisphere of the limiting ball, and the clamping groove is arranged with an elastic stop ring (5) for blocking the forward movement of the limiting ball; the limiting ball is fixedly connected with a pull wire (14).

2. The fiber-optic passive guy-wire longitudinal tear sensor of claim 1, wherein: The guide sleeve (3) is fixedly arranged with two fixed rods (15) respectively located at two sides of the trigger rod (7), the fixed rods (15) penetrating through the pressing plate (9), and the fixed rods (15) are threadedly connected with adjusting nuts (16) located at a side of the pressing plate (9) away from the spring (8).

3. The fiber-optic passive guy-wire longitudinal tear sensor of claim 1, wherein: The trigger rod (7) is sleeved with a sealing ring (6), and the trigger rod (7) and an inner hole wall of the guide sleeve (3) are sealed by the sealing ring (6).

4. The fiber-optic passive guy-wire longitudinal tear sensor of claim 1, wherein: The guide sleeve (3) is fixedly arranged with a guide rod (10) parallel to the trigger rod (7), and the guide rod (10) penetrates through the trigger plate (11).

5. A conveyor belt tear detection apparatus characterized by: The optical fiber passive pull wire longitudinal tear sensor (21) comprises the optical fiber passive pull wire longitudinal tear sensor (21) according to any one of claims 1-4, and the optical fiber passive pull wire longitudinal tear sensor (21) is two pieces, the two optical fiber passive pull wire longitudinal tear sensors are respectively located at two sides in a width direction of a conveying belt, pull wires of the two optical fiber passive pull wire longitudinal tear sensors extend to below an upper layer belt (27) of the conveying belt, and the pull wires of the two optical fiber passive pull wire longitudinal tear sensors are fixedly connected to form a tear trigger rope.

6. The conveyor belt tear detection apparatus of claim 5, wherein: Further comprising two fixedly arranged sensor supports (22), the shells of the two optical fiber passive pull wire longitudinal tear sensors are respectively fixedly connected with the two sensor supports (22), the two sensor supports are respectively arranged with tension springs (26), one ends of the tension springs (26) away from the sensor supports are connected with the tear trigger rope, and the tear trigger rope is shaped to be adapted to the upper layer belt (27) of the conveying belt.

Images