A flight bar pneumatic motor tensioning device

Abstract

The utility model relates to a kind of scraper conveyor pneumatic motor tensioning device, mainly for ground scraper conveyor, scraper tail is moved tensioning scraper chain assembly using pneumatic motor and speed reducer to drive scraper tail sprocket axle in scraper tail. Pneumatic motor and speed reducer drive worm wheel and worm shaft rotation, move by bearing seat connected with worm wheel and worm, to make the whole tail sprocket axle assembly displacement, tail sprocket axle assembly moves after making already loose scraper chain assembly tensioning, the tensioning degree of scraper chain relies on torque sensor control, after the torque generated by pneumatic motor and speed reducer driven worm wheel and worm shaft reaches preset data, pneumatic motor and speed reducer stop. If displacement sensor shows that sprocket axle assembly displacement has reached limit value, and the torque shown by torque sensor still does not reach set value, it indicates that the loosening degree of scraper chain has been unable to tension again, scraper chain needs to be removed or replaced, scraper chain needs to be removed several or overall replaced at this time.

Description

Technical Field

[0001] This utility model relates to a pneumatic motor tensioning device for scraper conveyors, which is mainly used in ground scraper conveyors when tensioning the scraper chain. It is used to tension the scraper chain or to detect whether the scraper chain needs to be replaced when the scraper chain becomes loose or slips. Background Technology

[0002] Currently, the scraper chain tensioning devices of ground scraper conveyors are either hydraulic or electric. Hydraulic tensioning has a complex structure and requires a hydraulic pump station; electric tensioning requires explosion-proof features, which have poor safety. Coal mine equipment generally uses pneumatic devices, so coal mines are generally equipped with air sources. Therefore, using pneumatic tensioning eliminates the need for a separate air source, has a simple structure, and offers strong safety and operability. Summary of the Invention

[0003] In order to achieve the tensioning of the scraper chain of a scraper conveyor or to detect whether it needs to be replaced, this utility model provides a pneumatic motor tensioning device for a scraper conveyor.

[0004] The solution adopted by this utility model to solve its technical problem is as follows: it consists of a pneumatic motor, a reducer, a torque sensor, a worm gear shaft, a worm gear, a displacement sensor, and a connecting screw; the pneumatic motor and the reducer are connected together and fixed on the tail support; the worm gear shaft passes through the reducer in the middle and is connected to the worm gear at both ends; the other end of the worm gear is connected to the bearing seat through the connecting screw; the pneumatic motor drives the reducer to rotate, the reducer drives the worm gear to rotate through the worm gear shaft, the worm gear drives the connecting screw to generate displacement, and the connecting screw pulls the tail sprocket shaft assembly to move, thereby tensioning the scraper chain assembly.

[0005] The torque sensor is fixed on the worm gear shaft, and the torque generated by the rotation of the worm gear shaft can be measured by the torque sensor.

[0006] The displacement sensor is installed near the two connecting screws, and the displacement generated by the connecting screws can be measured by the displacement sensor.

[0007] The beneficial effects of this utility model are: this invention can tension the scraper chain assembly of a ground scraper machine or detect whether it needs to be replaced. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0010] In the diagram: 1. Scraper chain assembly, 2. Tail sprocket shaft assembly, 3. Bearing housing assembly, 4. Connecting screw, 5. Displacement sensor, 6. Worm gear, 7. Worm gear shaft, 8. Torque sensor, 9. Reducer, 10. Pneumatic motor. Detailed Implementation

[0011] exist Figure 1 The assembly consists of a pneumatic motor 10, a reducer 9, a torque sensor 8, a worm gear 6, a worm gear shaft 7, and a displacement sensor 5. The pneumatic motor 10 and reducer 9 are connected together and fixed to the tailstock. The reducer 9 drives the worm gear 6 via the worm gear shaft 7. One end of the worm gear 6 drives the bearing seat 3 of the tail sprocket shaft assembly 2 via a connecting screw 4. The movement of the bearing seat 3 drives the entire tail sprocket shaft assembly, achieving the effect of tensioning the scraper chain assembly 1. The torque sensor 8 is fixed to the worm gear shaft 7 and detects the torque generated by the rotation of the worm gear shaft 7. The displacement sensor 5 is installed next to the connecting screw 4 and detects the displacement generated by the movement of the connecting screw 4. When the displacement sensor 5 detects that the displacement has reached its limit, while the torque sensor 8 detects that the torque has not yet reached the predetermined value, it indicates that the scraper chain assembly 1 is too loose to be tensioned by the tensioning device. In this case, the entire scraper chain assembly 1 needs to be replaced, or several scraper chains need to be removed. This serves the purpose of tensioning the scraper chain of the ground scraper machine or detecting whether it needs to be replaced.

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