SU1559194A1 - Rig for testing hydraulic props - Google Patents

Abstract

The invention relates to bench testing equipment in coal engineering and is intended for use primarily in high-volume production of hydraulic posts (HS). The goal is to improve the performance of the tests of the hydraulic double hydraulic expansion in test automation. The test bench for HS 1 includes frame 2, jack 3 for pressure GS 1, support 4, sensing thrust force GS 1, and hydraulic system 5. At stand in window 6, test GS 1 with larger diameter rod 7, stem 8 of smaller diameter and bottom valve are installed 9. The movable element 10 forms, with the support 4, a single-cylinder hydraulic cylinder 11, which is connected to the hydraulic system 5 through the locking device 12. At the end face 13 of the housing 14 of the HS 1, there is a distance ring (K) 15, and the end 16 of the stem 7 is an extension K 17. Composite HS 1 is installed in the stand and moved apart. At the end of the stroke of the rod 8, the locking device opens, interacting with the control element 18. The pressure in the cavity of the hydraulic cylinder 11 is released and further separation of HS 1 to the stop of the rod 8 into the support occurs, as a rule, by moving the rod 7. The force of the HS 1 spreads through the rod 7 and the K 17 spacer is not transmitted, which ensures the normal transmission of the GS 1 spacer force to the stand. The thrust force is transmitted to the support 4 through the rod 8. The height of the remote K 15 is less than the height of the spacer K 17 by an amount less than the stroke of the single-cylinder hydraulic cylinder 11. 1 sludge.

Description

The invention relates to bench testing equipment in coal engineering, and is intended for use primarily in large-scale production of hydroelements.

The aim of the invention is to improve the performance of tests of double hydraulic extensibility racks in test automation.

The drawing shows a test bench for hydraulic girders.

The test bench for hydraulic rails 1 consists of a frame 2, a jack 3, and a hydraulic post 1 rigidly fixed to the frame 2 of the support 4, which receives the thrust force of the hydraulic post 1, and the hydraulic system 5. On the bench 6, a test post of the hydraulic post 1 with a larger stem 7 is installed diameter, stem 8 of a smaller diameter and a bottom valve 9. The movable element 10 forms with a support 4 a single-cavity hydraulic cylinder 11, which is connected to the hydraulic system 5 through a locking device 12. At the end 13 of the housing 14 of the hydraulic rack 1 a distance ring 15 is installed ametra - spacer ring 17. The closure device 12 is opened by the control element 18.

The drawing also shows A - the course of a hydraulic post 1 until the stop of the rod 8 into the support 4; B - the course of the hydraulic post 1 until the stop of the rod 7 through the ring 17 into the movable element 10; B - the course of the hydraulic post 1 before the activation of the control element 18 of the locking device 12; G - stroke hydraulic cylinder 11; D - move

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wait for hydraulic 1 with a loading jack 3. The values of A, B, C, D correspond to the condition

B C;

A - B “G.

The value of B is set to the minimum while ensuring the possibility of installing a hydraulic post in the working window of the stand.

The stand works as follows.

The flow of fluid through the hydraulic system 5 and the locking device 12 is carried out by a full stroke and the ram of the hydraulic cylinder 11. The complicated hydraulic post 1, equipped with a remote 15 and spacer 17 rings, is installed in the stand and moves apart. At the same time, for the overwhelming majority of the racks, the rod 7 of a larger diameter moves to the end end 16 through the spacer ring 17 into the movable element 10 (stroke B is chosen) up to the stop.

The expansion force of hydraulic unit 11 is chosen so that for any 1 serviceable hydraulic post after exhaustion of stroke B and the pressure in the piston cavity of hydraulic post 1 begins, the small diameter stage expands (movement of the rod 8 relative to the rod 7), rather than folding the hydraulic cylinder 11. At the end of the rod 8, smaller the diameter of the locking device 12 opens, interacting with the control element 18. In this case, the pressure in the cavity of the hydraulic cylinder 11 is relieved, further extending the hydraulic column 1 to the stop of the rod 8 of smaller diameter into the support 4 pro coming off by moving the rod 7 with a larger diameter, and the thrust of the hydraulic post 1 through the rod 7 with a larger diameter and the spacer ring 17 is not transmitted (the hydraulic cylinder 11 is unloaded and does not create resistance to the movement of the rod 7) which ensures the normal transfer of the stand strut force on the stand only through the rod 8 of a smaller diameter on the support 4 and the elimination of the overload of the end 16 with the further expansion of the rack during the test. The bottom valve 9 of the rack 1 is closed at the same time, and the partial force is transmitted to the support 4 through the rod 8 of a smaller diameter.

Thus, the basic kinematic function is performed — the priority is the separation of a stage of smaller diameter by temporarily holding a stage of larger diameter, and directly in the stand, in the process

1559194

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 ramboard stand jack fixed in the frame on one side, support rigidly fixed on the frame with the possibility of receiving the rack stand force, hydraulic system for supplying working fluid to the stand elements and hydraulic posts, characterized in that, in order to improve the performance of double hydraulic extensibility hydrostats during test automation, the support is located inside the frame on the other side of it and is made in the form of a single-cavity hydraulic cylinder with a rod rigidly fixed on the frame, a piston rigidly fixed on litoka leading part, with the housing stop surface, is movably mounted with respect to the piston rod, channels and locking device for communicating the piston chamber with odnopolost- Nogo hydraulic cylinder having a control element for interac

All of the performance of the test 25 mode with the rod of a smaller dnatyk — spread the stands in the frame of the stand, without spending time on sliding the stand to its original state outside the working window of the stand.

When pressing a hydraulic jack 1 with a jack 3, the swinging stroke D is limited by the amount of movement of the remote ring 15 In this case, taking into account the power reserve for closing the bottom valve 9, the condition is B + D or, which is the same, D.- BG

Claims (1)

, Claims thirty 35 The stand is equipped with a ring for mounting the casing with a hydraulic stop against the projection of the hydraulic stand and a foot for installing the hydraulic post from the breaker into the restrictive support of the split, and the height is less than the height less che including frame, vertically mounted hydraulic cylinder. 0 five meter stand and the frame is made with a protrusion from the side of the support, while the stand is equipped with a distance ring for mounting on the upper end of the case of hydroresistance with the possibility of an emphasis on the frame ledge when sliding the stand and a spacer ring for mounting on the rod of a larger hydrostatic diameter with the possibility of restraining the restrictive the surface of the support body during the separation of a hydraulic post, and the height of the remote ring is less than the height of the spacer ring by an amount smaller than the stroke of the single side