SU885696A1 - Method of eliminating concrete-conveying pipeline clogging - Google Patents

Description

(54) METHOD OF ELIMINATING THE PROCUREMENT OF CONCRETE GUIDES

I

The invention relates to pipeline {hardening of filling mixtures and can be used in mining in underground mining with laying and in construction.

When transporting hardening filling mixtures through pipelines, emergency stops of the movement of mixtures occur due to the formation of concrete traffic jams in the pipeline. This leads to a simple stowing complex, an increase in unproductive expenditures on the elimination of the accident and an increase in injuries.

A known method of cleaning the filling pipeline from the concrete mix, in which the pipeline is connected to the air line by pneumatic cutters, which are located at an angle of 3B -40 ° to the direction of movement and have quick-disconnect connections and overlapping taps. The blockage of the pipeline is eliminated by alternately blowing parts of the pipe. pipeline compressed air from pneumatic cutters {1}

The disadvantages of this method are no reliability and significant material

the cost of equipping a large number of pneumatic cutters.

The nanoscaptometer for the elimination of concretions in concrete pipelines is located closest to the proposed one, according to which for blocking your blockages open side holes in the pipeline and vibrate pipe 2.

The disadvantage of this method is a decrease in the reliability of eliminating the blockage with a high stiffness of the filling mixture, especially when the pipe diameter is less than 200 mm when the side opening area is small, as well as when metal or wood objects get into the pipeline, which block the cross section of the pipeline in the transition joint. In this case, it is necessary to turn off the vibrators, disconnect the pipeline, spread the ends of the pipes to the sides and pour out the mixture onto the working soil. When the pipeline is disconnected, the SMC comes out in the form of a tschgandrich overbearing body and breaks off into pieces with a length of 0.3–0.5 MJ. The purpose of the invention is to ensure the safety of the closure process. This goal is achieved by the fact that, simultaneously with the effect of vibrators, the flow of the mixture in the water supply pipe is discharged, for example, by applying jetting water jets in the cross-flow direction of the water jets. The discontinuity of the flow cv & c in the concrete line is carried out before reaching the speed of the twin engine mix in the concrete e less than 6 m / s, while the mixture is extracted n from the side hole of the main duct and directed in turn. Bypass pipeline to the drop chamber. FIG. 1 shows an emergency reset device for drying the proposed method; in fig. 2 is a diagram of wa {zhantov oepaaoBa nor npo6dk. Example 1. The blocking of the water supply pipe occurred at transitional knee 1 (Fig. A) This may occur when the rigidity of the mortar is mixed with 0.5–3 sludge of the cone CLEANING during the transition to the skin 1 of the metal joint that blocked the concrete pipe 2 . In this case, the sensor 3 osorosti, the readings of which are outputted on the control panel, shows a zero CKOiKiCTb doubled down, and a PFC 4 lazy - a pressure higher than the worker, 10 atm, larger than small, for example 20 atm. The control side openings S 6 betovshoda 2 with pomoo The main section of the tcMM hydraulic coupling (control cables) includes the vibrations of the drill 7 from the perturbative tmtou 6, S kN, lianpHMep on the basis of the perforators PC-. vmp and with a yield of 0.5–0.6 mm At the same time, the side hole S of the concrete goda 2 noiitaioT contains water from a screen 8 at a pressure of 20-25 atm, connected to the fire pipe in the branch pipe 9, and the flow of the mixture in the water line is broken. from concrete (kvoda 2 in the form of a liquid bullet is fed through the bypass pipes (to the curvature 10, which is attached at an angle to the vertical concrete outlet 2 and valve casing b), to the emergency discharge chamber 11, the level of which is below the level of the soil of the filling tunnel 12. 1) in the concrete line 2, across its diameter opposite the side opening 5, a cylindrical cavity free from an adjacent one is formed, coaxial with the pipeline 2, the concrete tube will start to move slowly downward. When reaching the side opening 5 in the pipeline 2, it is destroyed by a jet of water from the hydraulic monitors 8 and in the form of This pulp is removed into the emergency discharge chamber 11 via the bypass pipeline 10. At the same time, the mixture will not overcompaction, fk as (the core fills the free cylindrical cavity without resistance, i.e., moves under conditions similar to the disconnected end of the concrete hood. When the mixture is set in motion and will not be over-compacted, the thickness of the near-wall layer of the co-tropic layer begins to increase in the mixture, which P1H1 leads to a decrease in printstein friction. This leads to an increase in the amplitude of the oscillations, for example, to 0.9-1 mm, and near-wall friction is reduced to the minimum value. This leads to a gradual, and then to an avalanche-like growth) of the rapid movement of the mixture, nationally, from 5 mm / s to 20 m / s for 5-30 minutes. The operator monitors the readings of the speed sensor of the mixture, and when it is large (the volume will become more than 6 m / s, it shuts off the water supply to the jetters 8. The mixture is squeezed out of the side opening 5 into the overflow pipe 10, because the dynamic component of the pressure of the moving mixture (speed spur ) it is sufficient to see the mixture in the area of the side opening 5. Then, via the bypass pipeline 10, the mixture from betonovod 2 enters the emergency discharge chamber 11. After leaving the whole conduit 2, the entire mixture j is disconnected from vibrators. The torus 13 and the emergency reset valve 6 are flushed with water.The side opening 5 is closed, including the emergency valve supply hydraulic jack B. Then the transition elbow 1 is disconnected from the vertical 2 and horizontal 14 of the water supply pipe, the mixture or the object stuck in the knee is removed. The knee to the vertical 2 and horizontal 14 pipelines. The elimination time for the blockage is 5 to 30 minutes. PRI mme R 2. The blockage occurred in the transitional knee and horizontal betonovoda (Fig. 2, c). In this case, the side hole 15 is opened in the main branch pipe 14 and the vibrators on the vertical and horizontal channel are turned on. A portion of 4-5 m of water is supplied to the vertical concrete pipe to create a hydrostatic head. And then the closure operations are carried out analogously to example 1.

Example 3. Blending of the mix occurred above the side opening of the emergency drop in the vertical water supply line (Fig. 2, b).

In this case, the side opening is opened, vibrators are turned on by horizontal cranes and Betojod springs, the mixture is advanced to the level (Fig. 2, a) as in Example 1, and operations to eliminate the blockage of the mixture are performed as in Example 1.

The proposed method provides for the closure of the beta-conductor in the most severe cases, 4 tO half /. zpyuchaet zagardeva ve filling concrete. in the pipeline and its subsequent drilling. In addition, the operation ensures the safety of work on the elimination of blockages, since it is carried out by distributive control of mechanisms and requires that the distributors of water supply lines be found under pressure from the mixture (G, which the internal labor costs).

Invention

Claims (2)

l. Elimination of snacks at the water supply in the shaft of vibration of the betonovod is distinguished by the fact that, in order to ensure that nponeccaj is free of charge, when the speed of movement of the mixture is zero, simultaneously with. by addition on the concrete pipe there is a discontinuity in the flow of the mixture. 2. A method according to claim 1, characterized in that the gap of the continuous flow of the mixture is caused by the impact of a stream of water under pressure in the cross flow direction. Sources of information taken into consideration 1. Aksenenko V.I. in -Dr. Oyusob cleaning the core of the pipeline from the concrete mix. Sat W) ryu station and technology of construction of concrete massif. M., IISS. 1976, N 152, p. 79-82. 2. Baikonurov O. A, p ar. The above-mentioned method of blocking the method of blocking the blockage of the azi pipe and the construction of the ruins of the Mak. Torvay magazine, 1977, and 10, p. 69-70. ; I X s / V g  / with K54Sy // 4SV yAV /; X D /