PL157925B1 - Method for protecting of a mining combined winning unit against self-sliding along the scraping conveyor and a device for implementing this method - Google Patents

Abstract

A device securing a mining combine against unintended slide-downs along the conveyor, the said mining combine being used in longwall excavations, specifically those inclined from 12 degrees to 25 degrees and operated with an endless chain, comprising a frame having a chain wheel installed in it and a double chain guide, wherein the frame (8) has a retaining pawl (9) with a guiding casing (10) coupled with a grip (11) that has a washer (13) and a spring (12) installed on it, the said grip (12) getting a profiled catch (21) with a flat spring (14).<IMAGE>

Description

The invention relates to a safety device against samozsuwem mining combine the conveyor zgrzeboowym used in longwall excavation, in particular with a slope ^{P d} loose in the range of ^d of 12 ° ^{to 2} to 5 °.

Used hitherto protection of mining combine, working in wyrobl.skac ^h longitudinal inclination in the range of ^d of ^d of 12 ° to 25 ^° and, Oleg to t m ^{s, e g} órnl.czy harvester combines SIA using the rope winch located in the security a roadway which, in the event of a breaker chain, protects the roadheader against its samozs ^^^ m along the conveyor by blocking the rope on the winch A hydraulic safety turnstile is a device that protects the shearer from self-sliding.

This method has the disadvantage that the rope used to perform this method, to which the roadheader is attached, whips during operation, posing a threat to the crew working in the wall and its upper recess, and moreover, the safety winch, due to its weight and large overall dimensions, makes the operation process difficult. longwall excavation. In order to prevent these inconveniences, the goal was to develop a device that protects the shearer from SJmolifting.

The essence of the invention consists in the fact that the mining combine is connected by means of a double working combine chain with the eye of the upper drive of the scraper conveyor through a ratchet device, and with the eye of the lower drive of the scraper conveyor through the known hydraulic tensioner of the chain haulage chain. »The device according to the invention has a built-in latch in the hull a broken chain on the sprocket. The locking pawl is connected to the handle on which the spring is built and the thrust washer for this spring. During the combine's operation, the spring is compressed, and in the event of the combine's chain breaking, the spring partially expands, blocking the broken chain on the star wheel.The device is equipped with a latch with a flat spring, which additionally locks a permanent ratchet device.

The result of the invention is the elimination of the whipping rope securing the combine against its sui by the possibility of securing it in the event of breaking one of the working chains on the remaining undamaged chain.

The device according to the present invention eliminates the installation of a safety turnstile in the sidewalk.

The invention is illustrated in the drawing in which Figs. 1a and 1b illustrate the method of applying the invention, and Fig. 2 shows a longitudinal section of the ratchet device.

The mining shearer 1 is connected by means of a double working chain 2 and 3 with the eye 4 of the upper drive of the scraper conveyor through a pad device according to the invention,

157 925 and with the eye 6 of the bottom drive of the scraper conveyor, the combine 1 is connected by the Je6t through the known hydraulic tensioner of the combine's 7 chain links.

The device for implementing the method according to the invention consists of a frame 8 in which a chain wheel 15 with a pin 16 and an eyepiece 17 are mounted for guiding the double chain. In the fuselage 8, there is a locking latch 9 with a guide for the cover 10, while the locking latch 9 is connected to the handle 11, on which the Je6t spring 12 and a thrust washer 13. The handle 11 includes a shaped latch 21 with a flat spring 14. The handle 11 finished There is a joint 18 with two pins 19 1 20.

An example of how the invention works. It is as follows: before the commencement of the work of the mining shearer, the shaped latch 12 of the ratchet device 5 is unlocked, and then the spring 12 is tightened by tensioning the 7 chain cables to cause it to almost fully compress the spring 12, thanks to which the ratchet 9 unlocks the chain wheel 15. At this point, the device is adapted to cooperate with the shearer 1, securing it at the same time against semose-stroke along the scraper conveyor, in the event of the chains 2 or 3 breaking, the tension in the broken chain 2 or 3 does not disappear, which causes expansion of the spring 12, which washer 13, handle 11 and latch 9 are blocked on the chain wheel 15 by the unbroken chain 2 or 3, creating a system of permanent connection of the combine 1 with the eye 4 of the upper drive of the scraper conveyor, thus securing the harvester 1 against semi-sliding on the cross conveyor. The whole connection system is additionally secured in a mechanical way with a shaped latch, 21.

157 925

Fig. 1a

Department of Publishing of the UP RP. Circulation of 90 copies

Price PLN 5,000.

Claims (1)

Patent claim Safety devices ^^ jn mobile mining conveyor before samozsuwem pt zgrzebtowym used in longwall excavation, particularly longitudinal inclination in the range of ^d of 12 ° to 25 ° and ^y working with the chain ^b with koilca, compos ^d CONSIDERING are ^Ia and ^b and ^k adłu , in which is mounted a chain wheel behind the pin and an eyepiece for double chain guiding, characterized by the fact that in the fuselage / 8 / it has a locking latch / 9 / together with a guiding cover / 10 / connected with a handle / 11 / on which a spring is installed / 12 / and washer / 13 /, the handle / 12 / enters, shaped latch / 21 / together with a flat spring / 14 /.