JP4913354B2 - Gravel unloading device and gravel unloading method - Google Patents

Description

  The present invention relates to a gravel carry-out device and a gravel carry-out method.

  Conventionally, when carrying out the ballast of a railway track, there has been (1) a method of carrying the excavated ballast on a conveyor (for example, see Patent Document 1). Moreover, when carrying out the earth and sand excavated at the civil engineering / construction site, there is a method of (2) pumping the earth and sand having fluidity with a pump or the like through a transport pipe (for example, see Patent Document 2). ).

JP-A-7-113203 JP-A-5-239848

  However, the method (1) is used for short-distance transportation. The method (2) is used for transportation of earth and sand, and when used for transportation of gravel such as ballast, there are problems such as a small amount of carry out per day and a blockage of a transportation pipe.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a gravel unloading apparatus and gravel unloading method capable of transporting gravel such as ballast over a long distance with a large transportation capacity. There is.

A first invention for achieving the above-described object includes a hopper, supply means for supplying water to the hopper, a pipe connected to a lower end of the hopper and having a water flow in a certain direction inside, A reduced-diameter member provided on the upstream side of the connecting portion with the hopper, and a suction pump provided on the downstream side of the connecting portion with the hopper of the pipe, and using the suction pump Gravel introduced into the hopper while lowering the water pressure in the connecting part by causing a water flow in a certain direction to the pipe and causing the water in the pipe to flow into the connecting part via the reduced diameter member; A gravel carrying-out apparatus characterized in that water supplied from the supply means to the hopper flows into the pipe through the connecting portion.

  Gravel is aggregate, ballast, crushed stone, etc. of railway tracks. The reduced diameter member is, for example, a jet nozzle, and the jet nozzle ejects a jet into the connecting portion. It is desirable to make the diameter of the jet nozzle outlet variable as required.

According to a second aspect of the present invention, there is provided a hopper, a supply means for supplying water to the hopper, a pipe connected to a lower end of the hopper and having a water flow in a fixed direction, and a connecting portion of the pipe to the hopper. Using a gravel carry-out device comprising a reduced-diameter member provided on the upstream side, and a suction pump provided on the downstream side of the connecting portion of the pipe with the hopper , using the suction pump, Gravity introduced into the hopper while reducing the water pressure in the connecting part by causing water flow in a certain direction to the pipe and flowing water in the pipe into the connecting part via the reduced diameter member, and the supply A method for carrying out gravel, characterized in that water supplied from the means to the hopper flows into the pipe via the connecting portion.

  Gravel is aggregate, ballast, crushed stone, etc. of railway tracks. The reduced diameter member is, for example, a jet nozzle, and the jet nozzle ejects a jet into the connecting portion. It is desirable to make the diameter of the jet nozzle outlet variable as required.

  ADVANTAGE OF THE INVENTION According to this invention, the gravel carrying-out apparatus and gravel carrying-out method which can carry gravel, such as a ballast, for a long distance with a big transport capability can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is an elevation view of the unloading device 2, FIG. 2 is a plan view of the unloading device 2, and FIG. 3 is an enlarged view of the vicinity of the hopper 1. FIG. As shown in FIGS. 1 and 2, the unloading device 2 includes a hopper 1, a drain pipe 5, a suction pump 7, a circulation water tank 9, a water supply pipe 17, a water injection pipe 19, a jet nozzle 25, a belt conveyor 29, and the like. Consists of.

  As shown in FIG. 3, the hopper 1 includes a funnel-shaped main body 39, a charging pipe 41 below the main body 39, and a valve 3 provided on the charging pipe 41. The cross section of the main body 39 is, for example, circular as shown in FIG. The lower end of the hopper 1 is connected to the drain pipe 5. The hopper 1 is for putting a ballast 31 into the drain pipe 5.

  As shown in FIGS. 1 and 2, the drainage pipe 5 has a suction pump 7 on the way. The suction pump 7 causes water flow in the direction indicated by the arrow A in the drainage pipe 5. As shown in FIG. 2, the hopper 1 and the drainage pipe 5 are arranged along a railway 35. The downstream end 53 of the drainage pipe 5 reaches the carry-out base 49. In the carry-out base 49, a ballast storage place 51 and a circulating water tank 9 are installed. The unloading base 49 is disposed on the road 37, for example.

  An appropriate amount of water 33 is stored in the circulation water tank 9. A submersible pump 11 is installed in the circulation water tank 9. The submersible pump 11 is connected to one end of the water supply pipe 17. The submersible pump 11 causes a water flow in the direction indicated by the arrow B in the water supply pipe 17. The water supply pipe 17 has a check valve 13 in the vicinity of the connecting portion with the submersible pump 11, and a valve 15 on the downstream side of the check valve 13.

  As shown in FIG. 2, the water supply pipe 17 is arranged along the railway 35, similarly to the drain pipe 5. The water supply pipe 17 branches near the hopper 1, and the branched portion becomes a water injection pipe 19. The water injection pipe 19 has a valve 21. The water injection pipe 19 is a supply means for supplying water 33 to the hopper 1.

  The downstream end 27 of the water supply pipe 17 is connected to the upstream end of the drainage pipe 5. The drain pipe 5 and the water supply pipe 17 are connected on the upstream side of the connecting portion 47 between the drain pipe 5 and the hopper 1. The water supply pipe 17 has a valve 23 between a branch portion of the water supply pipe 19 and the end portion 27.

  A jet nozzle 25 that is a reduced diameter member is provided at the end 27 of the water supply pipe 17. The diameter of the tip of the jet nozzle 25 is, for example, about half of the diameter of the water supply pipe 1. The jet nozzle 25 ejects the jet 43 to the connecting portion 47 between the drainage pipe 5 and the hopper 1.

  The drainage pipe 5 and the water supply pipe 17 are preferably composed of a plurality of pipes. Thereby, according to the excavation position of the ballast 31, the number of pipe | tubes which comprise the piping 5 for drainage and the piping 17 for water supply can be changed, and piping length can be adjusted.

  The belt conveyor 29 is installed near the hopper 1. The belt conveyor 29 transports the ballast 31 excavated from the track of the railway 35 to the hopper 1 and puts it into the hopper 1.

  Next, the operation of the carry-out device 2 will be described. In order to carry out the ballast 31 of the track of the railway 35 by using the carry-out device 2, first, the excavated ballast 31 is transported by a belt conveyor 29 or the like as shown in FIGS. Further, the water 33 in the circulation water tank 9 is sucked up by the submersible pump 11 to cause a water flow in the direction of arrow B in the water supply pipe 17, and the suction pump 7 is operated to cause a water flow in the direction of arrow A in the drainage pipe 5.

  As shown in FIG. 3, the water 33 that has flowed in the water supply pipe 17 in the direction of the arrow B is ejected as a jet 43 to the drainage pipe 5 through the jet nozzle 25. At this time, the water pressure of the connecting portion 47 between the hopper 1 and the drainage pipe 5 is reduced by adjusting the amount of the water 33 ejected by the jet nozzle 25 by the valve 23.

  FIG. 4 is a plan view of the hopper 1. 4 is a view as seen from the direction indicated by the arrow E in FIG. When the water pressure at the connecting portion 47 decreases, the drainage pipe 5 sucks air through the hopper 1 and water absorption by the suction pump 7 becomes impossible. Therefore, as shown in FIGS. 3 and 4, a part of the water 33 flowing through the water supply pipe 17 is poured into the hopper 1 through the water injection pipe 19 as shown by an arrow C to block air suction. . Note that the amount of water 33 to be injected from the water injection pipe 19 is adjusted using the valve 21.

  The water 33 poured into the hopper 1 from the water injection pipe 19 flows into the drainage pipe 5 through the valve 3. At this time, the valve 3, the valve 21, the valve 23, the submersible pump 11, the suction pump 7, and the like are adjusted so that the water 33 flows in a spiral flow as indicated by an arrow F in FIG. 4. Then, the ballast 31 transported by the belt conveyor 29 or the like is put into the hopper 1 and poured into the connecting portion 47 between the hopper 1 and the drainage pipe 5 together with the water 33.

  As shown in FIGS. 1 and 2, the water 33 including the ballast 31 that has flowed into the connecting portion 47 from the hopper 1 passes through the inside of the drain pipe 5 by the action of the jet 43 (FIG. 3) and the suction pump 7. Flow in the direction. The water 33 including the ballast 31 reaches the end 53 of the drainage pipe 5 and is then separated into the ballast 31 and the water 33, and the ballast 31 is discharged to the ballast storage 51. The water 33 is stored in the circulation water tank 9.

  As described above, according to the present embodiment, the jet nozzle 25 is provided on the upstream side of the connecting portion 47 between the hopper 1 and the drainage pipe 5 to adjust the water pressure of the connecting portion 47, and at the same time, the connecting portion using the jet 43 is used. By encouraging the movement of the ballast 31 and the water 33 in 47 in the direction of arrow A, the water 33 including the ballast 31 can be transported over a long distance.

  FIG. 5 shows the result of the transportation confirmation experiment of the ballast 31. FIG. 5 shows that the length from the connecting portion 47 of the drainage pipe 5 to the suction pump 7 is 45 m and the length from the suction pump 7 to the end portion 53 is 9 m in the carry-out device 2 as shown in FIGS. The experiment results in a state where the inner diameter of the drainage pipe 5 and the water supply pipe 17 is 8 inches, the diameter of the jet nozzle 25 is 4 inches, and the valve 21 is ¼ opened.

As shown in FIG. 5, in the carrying-out apparatus 2 of this Embodiment, it has confirmed that 50 m < ³ > / h ballast 31 can be conveyed without a problem on said conditions. Moreover, when conveying the ballast 31, it has confirmed that there was no big pressure fluctuation in the drainage piping 5 or the water supply piping 17, and there was no abrasion of piping.

  In addition, the structure of the conveying apparatus 2 is not restricted to what is shown in FIGS. FIG. 6 is an enlarged elevation view of the jet nozzle 25. As shown in FIG. 6, the jet nozzle 25 a provided at the end portion 27 of the water supply pipe 17 may be composed of a plurality of cylinders 45 such that the diameter of the jet port is variable. Further, the ballast 31 may be thrown into the hopper 1 from a backhoe or the like without using the belt conveyor 29.

  The installation position of each component of the carry-out device 2 is not limited to the position described above. The carry-out device 2 can be used not only for the ballast 31 on the track of the railway 35 but also for the transportation of ballast and crushed stone generated at other sites.

  The preferred embodiments of the gravel carry-out device and the gravel carry-out method according to the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

Elevation view of the unloading device 2 Plan view of the unloading device 2 Enlarged view of hopper 1 Top view of hopper 1 Results of ballast 31 transport confirmation experiment Enlarged elevation view of jet nozzle 25

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Hopper 2 ......... Unloading device 5 ......... Drain piping 17 ......... Water supply piping 19 ......... Water injection piping 25 ......... Jet nozzles 27, 53 ......... End 31 ......... Ballast 33 ……… Water 43 ……… Jet 47 ……… Connecting part

Claims (6)

With a hopper,
Supply means for supplying water to the hopper;
A pipe connected to the lower end of the hopper and having a water flow in a certain direction inside;
A diameter-reducing member provided on the upstream side of the connecting portion of the pipe with the hopper;
A suction pump provided on the downstream side of the connecting portion of the pipe with the hopper;
Comprising
Using the suction pump, a water flow in a certain direction is caused in the pipe, and the water in the pipe is caused to flow into the connecting part via the reduced diameter member, thereby reducing the water pressure in the connecting part, and the hopper A gravel carry-out apparatus, wherein the gravel put into the hopper and the water supplied to the hopper from the supply means are caused to flow into the pipe via the connecting portion. The gravel according to claim 1 , wherein the water supplied to the hopper is adjusted to flow in a spiral flow in the hopper, and gravel is poured into the water in the hopper adjusted to the spiral flow. Unloading device. The gravel carrying-out apparatus according to claim 1 or 2, wherein the supply means is a branch pipe that is branched upstream of a connection portion of the pipe with the hopper. With a hopper,
Supply means for supplying water to the hopper;
A pipe connected to the lower end of the hopper and having a water flow in a certain direction inside;
A diameter-reducing member provided on the upstream side of the connecting portion of the pipe with the hopper;
A suction pump provided on the downstream side of the connecting portion of the pipe with the hopper;
Using a gravel carry-out device comprising
Using the suction pump, a water flow in a certain direction is caused in the pipe, and the water in the pipe is caused to flow into the connecting part via the reduced diameter member, thereby reducing the water pressure in the connecting part, and the hopper Gravel thrown into the pipe and water supplied to the hopper from the supply means are caused to flow into the pipe through the connecting portion. 5. The gravel according to claim 4 , wherein the water supplied to the hopper is adjusted to flow in a spiral flow in the hopper, and gravel is poured into the water in the hopper adjusted to the spiral flow. Unloading method. The gravel carrying-out method according to claim 4 or 5, wherein the supply means is a branch pipe branched from the pipe upstream of a connecting portion with the hopper.

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