RU1783030C - Device for determining roughness of road - Google Patents

Abstract

Usage: construction and operation of roads, performance assessment of roads and pavements. SUMMARY OF THE INVENTION: the device comprises a vessel with a liquid made with holes in the bottom. The vessel with liquid is mounted on the support wheel by means of a spring-loaded rod with a fork at the lower end and a beam with needle valves on the upper. The device contains a drain tank located under the bottom of the vessel with liquid. The recording device is made in the form of a liquid level meter and an indicator. 1 ill.

Description

The invention relates to the construction and operation of roads and can be used to evaluate the performance of roads and pavements.

A device for determining road bumps is known, comprising hydraulically connected vessels with a fluid, one of which is fixedly installed.

A disadvantage of the device is that it can only be used to measure bumps at individually selected points on the road section under study.

Closest to the claimed invention is a device for detecting road bumps containing hydraulically connected vessels with a liquid, one of which is stationary, and the second vessel is pivotally mounted on the axis of the support wheel by means of a counterweight, and a recording device with a writing sensing element.

A disadvantage of this device is its considerable complexity. The meter is rigidly connected by a hose and an electrically conductive line to a stationary vessel, hence the inability to measure evenness over large sections of the road.

The purpose of the invention is to simplify the device and measure irregularities over long distances.

The goal is achieved in that in a device for determining bumps in roads containing a vessel with liquid mounted on the axis of the support wheel, and

Xi 09

s

with about

a recording device, the device is equipped with drain tanks, the vessel with liquid is made with holes at the bottom and mounted on the axis of the support wheel by means of a spring rod with a fork at the lower end and a beam with needle valves at the upper, while drain tanks are located under the bottom of the vessel with liquid, and needle valves are located in its openings, and the measuring device is made in the form of a liquid level meter and indicator.

The drawing shows a General view of the device.

The device comprises a vessel 1 with a liquid mounted on the axis 2 of the support wheel 3 by means of a fork 4 attached to the lower end of the rod 5, the upper end. which is located inside the vessel. A rocker 6 is attached to the upper end of the rod 5. Needle valves 7 are mounted at the ends of the rocker 6, which enter the calibrated holes - nozzles 8, made in the bottom of the vessel 1 with liquid.

Under the jets 8 there are drain tanks 9 with drain plugs 10. The rod 5 passes inside the vessel 1 through a sealing device consisting of a flange 1, an oil seal 12 and a packing follower 13. A restriction washer 14 is installed at the upper end of the rod 5 inside the vessel 1, and on the bottom - an adjusting washer 15. A spring 16 is installed between the bottom of the vessel 1 and the adjusting washer. A level meter containing a temperature-dependent circuit 17 and an indicator 18 with a power element 19 is placed in the vessel 1. The vessel 1 has a filler cap 20, a breather 21 and a damper 22 .

The device operates as follows.

Liquid is poured into vessel 1. Adjusting the washer 15 changes the tension of the spring 16. ensuring that the liquid flows out through the jets 8. The indicator 18 sets the initial value of the liquid level in the vessel 1. The device is attached to the vehicle and rolled at a constant speed along the measured section of the road. In the process of moving on uneven vibrations of the support wheel 3 through the rod 5, rocker 6

are transmitted to the needle valves 7. An amount of liquid in the container 9, proportional to the size and number of irregularities, flows out through the jets. At the end of the measurement, the final value is fixed

fluid level. The weight of the liquid during the measurement process remains unchanged, which provides constant pressure on the support wheel.

Flatness of the road section is estimated as

the sum of the vertical movements of the system is wheel 3, stem 5, needle valves 7 assigned to 1 km of the road.

The quantitative assessment of road flatness is determined from the expression:

Cl - C2

Ј h ° 100 s cm / km where Ci is the volume of liquid before measurement, m3;

C2 is the same, after measurement, m3;

Claims (1)

S is the area of the water mirror in the vessel, m2 (the mirror is invariably over its entire height). SUMMARY OF THE INVENTION A device for determining road bumps, comprising a vessel with a liquid mounted on the axis of the support wheel, and a recording device, characterized in that, in order to simplify the design and measure bumps over long distances, the device is equipped with drain tanks, a vessel with the liquid is made with holes in the bottom and mounted on the axis of the support wheel by means of a spring-loaded rod with a fork at the lower end and a rocker with needle valves on the upper, while the drain tank and placed under the bottom of the vessel with liquid, and in its holes arranged needle valves, wherein the recording device is made in the form of a liquid level meter and an indicator. 8 to/  / 7 / CH / i / III X 21 2U