SU1113709A1 - Device for lump material strength-testing - Google Patents

Abstract

1. A DEVICE FOR TESTING CLASS MATERIALS FOR STRENGTH containing a base horizontally mounted on the base with the possibility of rotating a cylindrical drum around a horizontal axis, on the side of which a hatch is made to unload sample material with a crinkle and drive the drum to rotate about It is due to the fact that, in order to mechanize the testing process, it is equipped with a shaft mounted on the drum shell parallel to the axis of rotation of the drum and kinematically connected with the drive of the rotation of the drum, and the cover is fixed on on the shaft. 2. The device according to claim. 1, exe (L such that it is provided with a brake interacting with the drum.

Description

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The invention relates to a test apparatus, in particular to devices for testing bulk materials for the effects of multiple shocks.

A device for determining the strength of lump materials, containing a horizontal cylindrical drum rotating around a horizontal axis, having a hatch with a lid on its cylindrical shell and a rotation drive of the drum, is known. In this case, the lid has a drum curvature, is installed flush with the jero inner cylindrical surface and is fixed to the drum with SC bolts.

However, the operations of closing and opening the lid are performed manually (installing the cover, tightening the nuts with wrenches, etc.), which prevents the testing process from being mechanized.

The closest to the invention to the technical essence is a device for testing lumpy materials for strength, comprising a base, a horizontally mounted cylindrical drum on a base rotatably around a horizontal axis, on the side of which a hatch is made to load and unload sample material with a lid, and a rotation drive the drum. The hatch cover, when loading and unloading the sample, is moved relative to the hatch in guides parallel to the drum axis. In the working position, the manhole cover is flush mounted with its inner cylindrical surface L2; i.

A disadvantage of this device is the impossibility of mechanizing the testing process, which is explained by the necessity of manual operations when opening and closing the hatch cover.

The aim of the invention is to mechanize the testing process by eliminating manual operations when closing and opening the hatch cover.

The goal is achieved by those. that a device for testing lumpy materials for strength, comprising a base, horizontally mounted on the base with the possibility of rotating around a horizontal axis a cylindrical drum, on the side of which a hatch is made to unload the sample material with a crush.

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and the rotational drive 6apa6a ia is provided with a shaft mounted on the drum shell parallel to the axis of rotation of the drum and kinematically associated with the rotational drive of the drum, and the cover is fixed to the shaft.

The device can also be equipped with a brake that interacts with the drum.

Q ila of FIG. 1 shows the proposed device; in fig. 2 shows section A-A in FIG. 1, in FIG. 3 shows an example of a device with a brake in the form of spring-loaded brake shoes; in fig. 4 - section bb in fig.Z. A device for testing the strength of lump materials contains a cylindrical drum 1-, on the side of which a hatch with a lid is made.

 2, a drum rotation drive including an electric motor 3, a gearbox A, a rotational transmission of the cover 2 including a pinion gear 5, a parasitic gear 6 and a driven

gear 7, made in the form

sector and rigidly bonded to the shaft 8, on which the cover 2 is installed. On the loading side, the shaft 9 of the drum 1 is hollow and mounted in the bearing 10. In the cavity of the shaft 9 is placed: 1 1 1 of the feed funnel 12, which is adjacent to the loading window 13, made in the end wall of the drum. Drive Side Axle Drum

5 1 is installed in the bearing 14 and does not have a rigid connection with the gear 5. The device can be equipped with a brake (Fig. 3 and 4), including a brake drum 15, which is rigidly and coaxially fixed in the end part of the drum 1, brake pads 16, springs 17, movable racks 18, tension screw 19 and nut 20. All components and parts of the device are installed

5 on the base 21, under which the discharge funnel 22 is located. The drive of rotation of the drum 1 also has a program mechanism 23.

0 A different type of brake can be used, for example, in the form of a coaxial drum 1 and a rigidly attached hollow torus, the cavity of which is partially filled with liquid and / or

5 bulk material (not shown).

A device for testing lump materials for strength works in the following way. The sample material through the feed funnel 12 enters the drum 1. After the drum 1 is loaded, the electric motor 3 is turned on. The torque from the drive through the drive gear 5, the parasitic gear 6 and the driven gear 7 is transmitted to the shaft 8 of the drum 2 of the drum 1. The shaft 8 rotates with the cover 2 until it is completely closed. At this moment, the rotational transmission of the cover 2 (gear 5, parasitic gear 6 and the knowledge of gear 7) stops and forms a shoulder through which torque is transmitted to drum 1 and drum 1 begins to rotate. When the drum 1 is moving, a part of the material constantly slides along the inner surface, and a part of the aercH lift with the help of elevator-corners (not shown) to a height of approximately 0.5-0.7 m, and then falls down. In the drum 1, two types of destruction of the sample material occur — abrasion and impact damage (when the material falls from the polo corners). After the 200th revolution, the drive is disconnected at a signal from the software device 23, and the drum 1 is stopped. In order to unload the drum 1, the drive of the drum 1 is activated to rotate in the opposite direction. At the same time, pinion 5 and parasitic pinion 6 rotate in the opposite direction, driven by pinion 7 with shaft 8, with the result that cover 2 begins to open. At the same time, the drum 1 remains in a stationary state, held by the friction forces 09 in the bearings, the sample material in the drum 1, and the braking torque created by the brake. At the moment when the lid of the 2 liter side is on the side of the drum 1, the drive torque overcomes the total braking torque and is transmitted through gears 5, 6 and 7 and the lid 2 on the side of the drum 1, causing the drum 1 to begin to rotate. The material in drum 1, through the open hatch, begins to be unloaded into the discharge funnel 22. Then all the sample material is subjected to particle size analysis to study its characteristics and calculate the coefficient characterizing the strength of the test material. The brake, which interacts with the drum 1, serves to increase the force acting on the cover 2, and to ensure a guaranteed fit of the crack 2 to the shell of the drum 1. The magnitude of the braking torque and, consequently, the force pressing the cover 2 can be changed by changing the tension of the spring 17 by moving the nut 20 on the tension screw 19. Mechanization of the opening and closing processes of the unloading hatch when using the proposed device facilitates the working conditions of the staff and speeds up testing, which allows more efficient control of the quality of lump materials and appropriate changes in technological processes.

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Claims (2)

1. DEVICE FOR TESTING LUMBAR MATERIALS FOR STRENGTH, containing a base horizontally mounted on the base with the possibility of rotation around a horizontal axis of a cylindrical drum, on the side of which a hatch is made for unloading sample material with a lid, and a drum rotation drive, which, in order to mechanize the testing process, it is equipped with a shaft mounted on the drum shell parallel to the axis of rotation of the drum and kinematically connected with the drive of rotation of the drum, and the cover is mounted on the shaft . 2. The device according to π. 1, characterized in that it is equipped with a brake interacting with the drum.