Roller shaft leaping detection device

Abstract

The utility model provides a roller shaft jump detection device, which comprises a sleeve, a positioning ring, a trigger rod, a sliding block, a spring, a travel switch and an alarm, the sleeve is provided with a closed end and an open end, the closed end is opposite to the open end, the closed end is provided with a through hole, and the spring, the sliding block and the positioning ring are sequentially arranged in the sleeve from the closed end to the open end. The two ends of the spring make contact with the closed end and one end of the sliding block respectively, a threaded hole and a through hole are formed in the center of the sliding block, the positioning ring and the threaded hole are coaxial, an external thread section matched with the threaded hole is arranged on the interruption portion of the trigger rod, the trigger rod penetrates through the positioning ring and the through hole, and the two ends of the trigger rod stretch out of the two ends of the sleeve respectively. The travel switch is fixed to the outer side of the closed end of the sleeve through the travel switch support and electrically connected with the alarm, and the trigger rod is slidably connected with the sleeve. The utility model has the beneficial effects that the roller shaft can be monitored in real time, an alarm is given in time when the shaft shifting phenomenon is found, and accidents are avoided.

Description

Technical Field

[0001] The utility model relates to a roller shaft jumping detection device. Background Art

[0002] Belt conveyor is a continuous transport equipment, mainly used to transport bulk materials in a straight line. It is widely used in ports, steel mills, cement plants, mines, etc. It is usually composed of belts, rollers, drums, drives, sweepers, etc. The drum is used to change the running direction of the belt. It is usually composed of drum skin, shaft, bearing seat, bearing, locking sleeve, locking nut, left end cover, right end cover, labyrinth cover, etc. Figure 1 As shown, the locking sleeve is installed between the inner ring of the bearing and the roller shaft. Since both the locking sleeve and the inner ring of the bearing are inclined structures, tightening the locking nut can increase the contact stress between the locking sleeve and the roller shaft, and connect the bearing, locking sleeve, and roller shaft as one. If the locking nut is loose or the locking nut preload is insufficient, the contact stress between the locking sleeve and the roller shaft will decrease, and the roller shaft will undergo axial displacement relative to the locking sleeve. This phenomenon is called shaft jumping. After the roller jumps, the labyrinth cover plate will be in direct contact with the right end cover. During the operation of the roller, the friction at the contact part will generate high temperature, igniting the grease inside the bearing seat, and then igniting the belt, causing a fire.

[0003] The conventional method for detecting the roller jumping is to measure the distance between the roller skin and the bearing seats on both sides. When the roller has not jumped, the distance between the roller skin and the bearing seats on both sides is basically the same. After the roller jumps, the distance between the two sides deviates significantly, which means that the roller has jumped. This method is simple and effective, but it has great limitations. It can only be measured when the belt conveyor is stopped, and it cannot be detected online in real time. Moreover, it has a lag and cannot be discovered immediately after the roller jumps. Summary of the invention

[0004] The problem to be solved by the utility model is to provide a roller axis jumping detection device, which overcomes the shortcomings of the prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a roller axle jumping detection device, including a sleeve, a positioning ring, a trigger rod, a slider, a spring, a travel switch and an alarm, the sleeve having a closed end and an open end, the closed end and the open end are opposite to each other, the closed end has a through hole, the spring, the slider and the positioning ring are arranged in sequence from the closed end to the open end in the sleeve, the two ends of the spring are respectively in contact with the closed end and one end of the slider, the center of the slider has a threaded hole, the through hole, the positioning ring and the threaded hole are coaxial, the interruption of the trigger rod has an external thread section adapted to the threaded hole, the trigger rod passes through the positioning ring and the through hole, the two ends of the trigger rod extend from the two ends of the sleeve respectively, the travel switch is fixed to the outside of the closed end of the sleeve through a travel switch bracket, the travel switch is electrically connected to the alarm, and the trigger rod is slidably connected to the sleeve.

[0006] Optionally, a protective cap is further included, wherein the protective cap is fixed on the closed end of the sleeve, and the travel switch is located inside the protective cap.

[0007] Optionally, the inner wall of the sleeve has a groove parallel to the axis thereof, and the sliding block has a boss matched with the groove.

[0008] The utility model has the advantages and positive effects that: due to the adoption of the technical solution, the roller shaft can be monitored at all times, and an alarm can be given in time when the shaft shifting phenomenon is found, thereby avoiding the occurrence of accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is an overall schematic diagram of a specific implementation method of the utility model;

[0010] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0011] Figure 3 It is a schematic diagram of the installation position of the utility model;

[0012] Figure 4 yes Figure 1 Schematic diagram of the middle sleeve structure;

[0013] Figure 4-1 yes Figure 4 Middle DD section view;

[0014] Figure 4-2 yes Figure 4 Middle EE cross-sectional view;

[0015] Figure 5 yes Figure 1 Schematic diagram of the middle slider structure;

[0016] Figure 5-1 yes Figure 5 Schematic diagram of the middle BB section;

[0017] In the figure: 1. roller shaft; 2. left end cover; 3. protective cap; 4. sleeve; 4-1. fixing hole; 4-2; groove; 4-3. through hole; 5. spring; 6. slider; 6-1. boss; 6-2. threaded hole; 7. positioning ring; 8. trigger rod; 9. travel switch bracket; 10. travel switch; 11. roller shaft jumping detection device. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In the description of the utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model 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 of the utility model. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a connection between the two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.

[0019] like Figure 1 , Figure 2 As shown, the utility model provides a roller shaft jumping detection device, including a sleeve 4, a positioning ring 7, a trigger rod 8, a slider 6, a spring 5, a travel switch 10 and an alarm (not shown in the figure), as shown in FIG. Figure 4 , Figure 4-2As shown, in this embodiment, the sleeve 4 is a cylindrical structure, with an outer diameter of 90mm, an inner diameter of 80mm, and a length of 128mm. The internal groove is 3mm wide, 2mm high, and 118mm long. The flange edge diameter is 140mm, the four fixing holes have a diameter of 10mm, the flange edge is 5mm thick, the through hole at the bottom of the sleeve has a diameter of 24mm, the threaded holes on the sleeve 4 are all M4 internal threads, the bottom of the sleeve 4 is 5mm thick, and the material of the sleeve 4 is Q235. The sleeve 4 has a closed end and an open end, the closed end and the open end are opposite, and the closed end has a through hole 4-3. The spring 5, the slider 6 and the positioning ring 7 are arranged in sequence from the closed end to the open end in the sleeve 4. The spring 5 is made of 60Si2Mn, the spring wire diameter is 4mm, the spring 5 outer diameter is 80mm, the spring 5 free height is 68mm, the pitch is 12mm, the two ends of the spring 5 are in contact with the closed end and one end of the slider respectively, and the slider 6 has a threaded hole 6-2 in the center. The slider 6 is made of aluminum alloy, the slider 6 has an outer diameter of 80mm, a thickness of 30mm, a boss width of 3mm, a height of 1.5mm, and the threaded hole 6-2 is an internal thread of M24. The positioning ring 7 is made of aluminum alloy, with an inner diameter of 60mm, an outer diameter of 80mm, and a chamfered part size of 2mm*2mm. The through hole 4-3, the positioning ring 7 and the threaded hole 6-2 are coaxial, the interruption of the trigger rod 8 has an external thread section adapted to the threaded hole 6-2, the trigger rod 8 passes through the positioning ring 7 and the through hole 4-3, the trigger rod 8 is made of nylon, 180mm long, the diameter of the cylindrical part is 20mm, the threaded part specification is M24, the length is 60mm, the chamfer size of both ends is 2mm*2mm, the two ends of the trigger rod 8 extend from the two ends of the sleeve 4 respectively, the travel switch 10 is fixed to the outside of the closed end of the sleeve 4 through the travel switch bracket 9, the travel switch 10 model is V3S-83169, the voltage level is DC 24V, the trigger stroke is 0.5mm, the travel switch 10 is electrically connected to the alarm, and the trigger rod 8 is slidably connected to the sleeve 4.

[0020] It also includes a protective cap 3, which is fixed on the closed end of the sleeve 4. The travel switch 10 is located in the protective cap 3. The protective cap 3 is made of aluminum alloy, with an outer diameter of 60mm in the cylindrical part, a wall thickness of 2mm, a flange edge thickness of 2mm, an outer diameter of 80mm, a fixing hole diameter of 5mm, and an overall height of 70mm. The protective cap plays a protective role in protecting the travel switch.

[0021] like Figure 4-1 , Figure 5 As shown, the inner wall of the sleeve 4 is provided with a groove 4 - 2 parallel to its axis, and the slider 6 is provided with a boss 6 - 1 adapted to the groove 4 - 2 .

[0022] like Figure 3 As shown, when in use, the left and right end covers at both ends of the roller shaft 1 are both installed with a roller shaft shifting device. Taking the left end cover 2 of the roller shaft 1 as an example, the installation process is as follows:

[0023] 1. Drill a through hole with a diameter of 20 mm in the center of the left end cover 2 of the bearing seat, and process 4 M8 threaded holes around the through hole;

[0024] 2. Install the spring 5 into the sleeve 4, align the boss 6-1 of the slider 6 with the groove 4-2 of the sleeve 4, and then install the slider 6 into the sleeve 4;

[0025] 3. Place the positioning ring 7 into the sleeve 4, and then screw the external threaded portion of the trigger rod 8 into the internal threaded hole 6-2 of the slider 6;

[0026] 4. Align the trigger rod 8 with the through hole of the left end cover 2, push it in as a whole, then fit the flange edge of the sleeve 4 to the left end cover 2, and fix it with four M8*20 hexagon socket screws;

[0027] 5. Gently rotate the exposed part of the trigger rod 8 to make the other end of the trigger rod 8 fit with the drum shaft 1;

[0028] 6. Install the travel switch bracket 9 and fix it with two M4*8 hexagon socket screws;

[0029] 7. Install the limit switch 10, adjust the position of the limit switch 10 so that the triggering part of the limit switch 10 just contacts the exposed end surface of the trigger rod 8, and then fix the limit switch with four M4*15 bolts;

[0030] 8. Install the protective cap 3 and fix it with four M4*8 hexagon socket screws. The installation is complete.

[0031] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A roller axis jumping detection device, characterized in that: It includes a sleeve, a positioning ring, a trigger rod, a slider, a spring, a travel switch and an alarm. The sleeve has a closed end and an open end, the closed end and the open end are opposite to each other, and the closed end is provided with a through hole. The spring, the slider and the positioning ring are arranged in sequence in the sleeve from the closed end to the open end. The two ends of the spring are respectively in contact with the closed end and one end of the slider. The center of the slider has a threaded hole, the through hole, the positioning ring and the threaded hole are coaxial, the interruption of the trigger rod has an external thread section adapted to the threaded hole, the trigger rod passes through the positioning ring and the through hole, and the two ends of the trigger rod extend from the two ends of the sleeve respectively. The travel switch is fixed to the outside of the closed end of the sleeve through a travel switch bracket, the travel switch is electrically connected to the alarm, and the trigger rod is slidably connected to the sleeve.

2. The roller axis deviation detection device according to claim 1 is characterized in that: It also includes a protective cap, which is fixed on the closed end of the sleeve, and the travel switch is located inside the protective cap.

3. The roller axis jumping detection device according to claim 1 or 2, characterized in that: The inner wall of the sleeve is provided with a groove parallel to the axis thereof, and the sliding block is provided with a boss matched with the groove.

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