JP6045042B2 - Slurry supply hopper - Google Patents

Description

  The present invention relates to a slurry supply hopper that is used to feed a slurry to a slurry pump for pumping a slurry-like material such as mortar.

  Slurry materials such as mortar are sprayed onto slopes and stone wall gaps in slope reinforcement work, stone wall retaining wall reinforcement work, grout injection work for building seismic reinforcement, bridge cross-section repair work (repair work), etc. Or a slurry pump is used to inject. The slurry pump includes a suction port and a discharge port, sucks slurry such as mortar from the suction port, and pumps and discharges the slurry from the discharge port. Usually, a slurry supply hopper for charging slurry is connected to the suction port. An operator puts slurry mortar prepared by mixing cement, water, fine aggregate, and the like into a slurry pump from a slurry supply hopper, and sprays or injects the mortar.

  As the slurry supply hopper used in such applications, those described in Non-Patent Document 1-2 and Patent Document 1-4 are known.

  FIG. 10 is a slurry supply hopper described in Non-Patent Document 1. The slurry supply hopper 100 includes a funnel-shaped charging container 101 opened up and down, a frame 102 that supports the outer surface of the charging container 101 on the floor, and a suction / discharge pipe 103 connected to the opening at the lower end of the charging container 101. And a pipe joint 104 disposed at the tip of the suction / discharge pipe 103. The charging container 101 is formed in a cylindrical shape with an upper part 101a having a cylindrical shape and a lower part 101b with a diameter decreasing downward. The suction / discharge pipe 103 is disposed horizontally with respect to the floor surface, and the base end side of the suction / discharge pipe 103 communicates with the lower end of the input container 101.

  FIG. 11 is an overall configuration diagram of a mortar spraying apparatus using the slurry supply hopper described in Non-Patent Document 2. The mortar spraying device includes a slurry supply hopper 100, a slurry pump 105 (mortar pump), a suction pipe 106 (suction hose), a high-pressure discharge pipe 107 (high-pressure delivery hose), and a spray nozzle 108. The suction / discharge pipe 103 of the slurry supply hopper 100 is connected to the suction port 105 a of the slurry pump 105 by a suction pipe 106. A high pressure discharge pipe 107 is connected to the discharge port 105 b of the slurry pump 105, and a spray nozzle 108 is connected to the tip of the high pressure discharge pipe 107. The high pressure discharge pipe 107 is a flexible hose made of resin or rubber. Mortar is put into the slurry supply hopper 100 and stored. The mortar stored in the slurry supply hopper 100 is pumped from the suction pipe 106 through the high pressure discharge pipe 107 to the spray nozzle 108 by the slurry pump 105, mixed with the air pumped from the compressor through the air hose, and injected from the spray nozzle 108. Is done.

  Patent Document 1 describes a slurry supply hopper similar to Non-Patent Documents 1 and 2. Patent Document 2 describes an example in which the slurry supply hopper is used in a fluidity inspection apparatus for ready-mixed concrete as another application example. Patent Document 3 describes a slurry supply hopper that has wheels attached to a frame to facilitate movement. Patent Document 4 describes an example in which the side wall of the conical cylindrical portion at the bottom of the slurry supply hopper is formed in a shape that warps inward to prevent clogging of the discharge port at the lower end.

Japanese Patent Laid-Open No. 10-238479 (FIG. 1) Japanese Patent Laid-Open No. 10-318903 (FIGS. 1 and 4) US Patent Application Publication No. 2009/0129903 US Patent Application Publication No. 2004/0052590

Okasan Kiko Co., Ltd., “Maru Hopper” catalog, [online], searched on October 17, 2014, Okasan Kiko Co., Ltd. HP, Internet <URL: http://www.okasankikou.co.jp/products_hopp_circ. html> Okasan Kiko Co., Ltd., “New Rotary Pump OKG-35E” catalog, [online], searched on October 17, 2014, Okasan Kiko Co., Ltd. HP, Internet <URL: http://www.okasankikou.co. jp / data / okg35e.pdf>

  When the mortar spraying work is actually performed at the construction site, one worker carries out the spraying work to the construction site with the spray nozzle 108 and the other worker kneads the slurry supply hopper 100. It is necessary to add mortar sequentially. Therefore, in an actual spraying operation, two workers are required for one mortar spraying device. If it is going to carry out spraying work in parallel at two construction sites at the same time, the work is performed using two mortar spraying devices, and a total of four workers are required, resulting in poor personnel efficiency.

  Therefore, the present inventor branched the suction / discharge pipe 103 of the slurry supply hopper 100 left and right and connected the slurry pump 105 to each of the branched suction / discharge pipes 103 in order to reduce the number of necessary workers. It is considered that one slurry supply hopper 100 is shared by the slurry pump 105. However, it has been clarified that when two slurry pumps 105 are connected to one slurry supply hopper 100, there is a problem that mortar is clogged at the lower end outlet of the slurry supply hopper 100.

  Therefore, an object of the present invention is to provide a slurry supply hopper capable of preventing clogging of slurry at the lower end outlet when a plurality of slurry pumps are connected to one slurry supply hopper. It is in.

A first configuration of a slurry supply hopper according to the present invention is a hopper that supplies slurry to a suction port of a slurry pump.
An input container having an upper end and a lower end opened and formed in a funnel shape;
A plurality of suction / discharge pipes connected to a lower end of the input container and connected to the suction port of the slurry pump;
A flow dividing wall that is disposed at a lower portion of the input container and divides an inner space of the lower portion of the input container with respect to each of the suction and discharge pipes, and
Each of the internal compartment spaces in the lower part of the input container defined by the flow dividing wall has a lower end side communicating with only one suction / discharge pipe corresponding to the internal compartment space.

  According to this configuration, since the internal space below the input container is partitioned by the flow dividing wall, the suction pressure from each slurry pump does not cancel each other, and the slurry in the input container is smoothly sucked and carried out from the suction / discharge pipe. It was experimentally confirmed that the slurry could be prevented from clogging at the lower end of the charging container.

  That is, in the case of the conventional slurry supply hopper, when the suction / discharge pipe is branched to the left and right and the suction is performed by the slurry pump from each of the branched suction pipes, the suction force from each suction / discharge pipe is reversed at the lower end outlet of the input container. Compete and cancel each other. Therefore, it is considered that the suction force at the lower end outlet of the charging container is weakened and the moving speed of the slurry from the charging container to the suction / discharge pipe is slowed down. On the other hand, since the suction force of the slurry pump is directly applied to the outlet side of each suction / discharge pipe, only the liquid component in the slurry that is easy to move is sucked and discharged first, and the slowly moving solid component is collected at the lower end outlet of the input container. It is thought that it will get stuck. Therefore, it is considered that clogging at the lower end outlet of the input container is prevented by partitioning the lower end outlet of the input container with a flow dividing wall to prevent the suction forces of the slurry pumps from canceling each other.

  In a second configuration of the slurry supply hopper according to the present invention, in the first configuration, each suction / discharge pipe is a curved pipe curved outward from the center of the input container, The discharge pipe is disposed so as to be symmetrical with respect to the central axis of the input container.

  According to this configuration, by forming each suction / discharge pipe into a curved pipe curved outward from the center of the input container, the flow of slurry in each suction / discharge pipe becomes smooth, and the pressure loss of the suction pressure decreases. It is possible to prevent clogging more effectively.

  In a third configuration of the slurry supply hopper according to the present invention, in the first or second configuration, each of the suction / discharge pipes is disposed so as to be symmetric with respect to a central axis of the input container. It is characterized by being.

  According to this configuration, by arranging the suction / discharge pipes symmetrically, the flow of the slurry in each compartment space below the input container is equalized, and clogging can be prevented more effectively.

  A fourth configuration of the slurry supply hopper according to the present invention is characterized in that in any one of the first to third configurations, a vibration device for vibrating the lower portion of the charging container is provided.

  According to this configuration, by vibrating the lower portion of the charging container, solid components in the slurry adhering to the inner wall of the charging container due to friction are separated by vibration, so that clogging can be prevented more effectively. .

  As described above, according to the present invention, even when a plurality of slurry pumps are connected to one slurry supply hopper and used by dividing the internal space below the charging container with a flow dividing wall, The slurry in the container is smoothly sucked and carried out from the suction / discharge pipe, and the slurry can be prevented from being clogged at the lower end portion of the charging container.

  As a result, a plurality of slurry pumps can be connected to one slurry supply hopper and used. For example, when performing mortar spraying work in an actual construction site, mortar is sequentially added. The number of workers can be reduced, and personnel efficiency is improved. For example, when two slurry pumps are connected to one slurry supply hopper and one slurry supply hopper is shared by two slurry pumps, conventionally, the work of spraying with two workers who put in mortar Although a total of 4 people, 2 staff members, was required, it can be reduced to a total of 3 people: 1 worker who puts in mortar and 2 workers who perform spraying work.

  In addition, the slurry supply hopper of the present invention is a mortar spraying or injection other than the above-mentioned slope reinforcement work, stone wall retaining wall reinforcement work, grout injection work for building seismic reinforcement, bridge cross-section repair work (repair work), etc. It can also be applied to applications.

It is a perspective view of the slurry supply hopper which concerns on Example 1 of this invention. (A) The perspective view seen from right diagonally forward, (b) The perspective view seen from diagonally forward upper. It is the (a) top view and (b) bottom view of the slurry supply hopper of FIG. It is sectional drawing of the slurry supply hopper of FIG. (A) AA sectional view taken on the line of FIG. 2, (b) BB sectional drawing of FIG. It is explanatory drawing showing the flow of the slurry at the time of the suction and discharge of the slurry in a slurry supply hopper. 2 is a photograph showing a state of implementation of an effect verification test of the slurry supply hopper of Example 1. FIG. It is sectional drawing of the slurry supply hopper which concerns on Example 2 of this invention. It is a perspective view of the slurry supply hopper which concerns on Example 3 of this invention. It is the (a) top view and (b) bottom view of the slurry supply hopper of FIG. It is sectional drawing of the slurry supply hopper which concerns on Example 4 of this invention. A slurry supply hopper described in Non-Patent Document 1. 3 is an overall configuration diagram of a mortar spraying apparatus using a slurry supply hopper described in Non-Patent Document 2. FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a slurry supply hopper according to Embodiment 1 of the present invention. FIG. 1A is a perspective view seen from the right front side, and FIG. 1B is a perspective view seen from the upper front side. 2A is a plan view of the slurry supply hopper of FIG. 1 and FIG. 2B is a bottom view thereof. 3 is a cross-sectional view of the slurry supply hopper of FIG. 3A is a cross-sectional view taken along line AA in FIG. 2, and FIG. 3B is a cross-sectional view taken along line BB in FIG.

  The slurry supply hopper 1 according to the present embodiment is made of metal and includes an input container 2, a frame 3, a suction / discharge pipe 4, a pipe joint 5, and a flow dividing wall 6. The slurry supply hopper 1 according to this embodiment has a symmetrical shape in the front-rear direction and in the left-right direction.

  The charging container 2 is formed in a funnel shape and has a shape in which an upper end and a lower end are opened. The upper portion of the charging container 2 has a cylindrical shape, and the lower portion has a truncated cone shape whose diameter is reduced downward. The frame 3 is a frame base that holds the charging container 2 in a floor shape. The frame 3 includes two vertically inverted U-shaped frames arranged in parallel in the front-rear direction, and in the vicinity of the central part between the left and right vertical sides of the front and rear frames, a horizontal cylindrical shape. It has the structure connected with the rod-shaped body. The upper ends of the four vertical sides are welded to the outer wall of the upper cylindrical portion of the charging container 2.

  The suction / discharge pipe 4 is a symmetrical cylindrical tube having a large diameter at the center and a small diameter at the left and right ends. The center is connected to the lower discharge port 2a at the lower end of the input container 2 and And the inside of the charging container 2 communicate with each other. The pipe joint 5 is attached to the left and right ends of the suction / discharge pipe 4. The pipe joint 5 is a joint for connecting a suction hose for connecting to a slurry pump.

  The flow dividing wall 6 is disposed from the lower part in the input container 2 to the central part in the suction / discharge pipe 4, and divides the internal space in the input container 2 and the suction / discharge pipe 4 into the left and right. Of the internal compartment space below the input container 2 partitioned by the flow dividing wall 6, the left internal compartment space has its lower end side (the lower discharge port 2 a side) and the internal space of the left pipe portion 4 a of the suction discharge pipe 4. The lower right side (lower discharge port 2a side) of the right internal partition space communicates only with the internal space of the right pipe portion 4b of the suction / discharge pipe 4.

  The operation of the slurry supply hopper 1 according to this embodiment configured as described above will be described below. FIG. 4 is an explanatory diagram showing the flow of the slurry when the slurry is sucked and discharged in the slurry supply hopper. FIG. 4A shows the slurry supply hopper of this embodiment, and FIG. 4B shows the slurry supply hopper without the flow dividing wall 6. In FIG. 4, arrows indicate the flow direction of the slurry and the flow speed.

  When there is no flow dividing wall 6 (FIG. 4B), in the region B in the vicinity of the lower discharge port 2a of the input container 2, since suction is performed from the left and right sides of the suction / discharge pipe 4, the flow of the liquid flows near the center of the suction / discharge pipe 4. Stagnation occurs. In the case of a normal low-viscosity fluid such as water, such a stagnation does not occur because the suction pressure almost acts as a suction force, but in the case of a slurry in which solid particles such as mortar and a low-viscosity fluid are mixed, While the fluid component moves due to the suction pressure, the solid particles are reduced in mobility because the suction force is reduced by contact between the particles and contact with the tube wall. Accordingly, in the central portion of the suction / discharge pipe 4 (lower discharge port 2a of the input container 2), as a result of strong suction from both sides by the two slurry pumps, only the fluid component having high mobility is quickly sucked and solid-liquid separation is performed. It is considered that the solid component is left in the central portion of the suction / discharge pipe 4 and accumulates to cause clogging.

  On the other hand, when the flow dividing wall 6 is provided (FIG. 4 (a)), the region B near the lower discharge port 2a of the charging container 2 is divided on the left and right sides and is not sucked from both sides. In addition, the left and right regions merge in the region A near the upper end of the flow dividing wall 6, but in the region A, both the left and right are sucked downward and the flow direction is the same. Separation does not occur. Therefore, it is considered that the slurry clogging phenomenon does not occur in the vicinity of the lower discharge port 2a of the charging container 2, and the slurry is smoothly discharged from the charging container 2.

(Test example)
In order to verify the operation and effect of the present invention, an actual machine of the slurry supply hopper 1 of Example 1 was manufactured and an effect verification test was performed. FIG. 5 is a photograph showing the state of the effect verification test of the slurry supply hopper 1 of Example 1. As shown in FIG. 5, one slurry pump is connected to each of the left tube portion 4a and the right tube portion 4b of the suction / discharge tube 4, and a high-pressure delivery hose and an injection nozzle are connected to the discharge port of each slurry pump. Two workers conducted a mortar injection test in parallel. As a result of the implementation, the work could be smoothly performed without clogging the mortar slurry in the lower discharge port 2a of the charging container 2. In addition, two workers perform mortar injection work, and one worker performs mortar replenishment work for the slurry supply hopper 1, thereby allowing three workers to perform mortar injection work in two locations in parallel. Has been demonstrated to be possible.

  FIG. 6 is a cross-sectional view of a slurry supply hopper according to Embodiment 2 of the present invention. In the slurry supply hopper 1 of the present embodiment, the connection portions 8 and 8 between the lower discharge port 2a of the charging container 2 and the left pipe part 4a and the right pipe part 4b are curved outward from the center of the charging container (corner). It is characterized by a rounded (rounded) bent tube. As described above, the connection portions 8 and 8 are rounded so that an increase in the flow resistance of the slurry in the connection portions 8 and 8 can be suppressed, and the clogging of the slurry in the connection portions 8 and 8 can be more effectively performed. Can be prevented.

  FIG. 7 is a perspective view of a slurry supply hopper according to Embodiment 3 of the present invention. FIGS. 8A and 8B are a plan view and a bottom view of the slurry supply hopper of FIG. The slurry supply hopper 1 according to this embodiment has a symmetrical shape in the front-rear direction and in the left-right direction. In the slurry supply hopper 1 of this embodiment, the suction / discharge pipe 4 is branched in four directions, and the left side pipe part 4a, the right side pipe part 4b, the front side pipe part 4c, and the rear side from the lower end of the charging container 2 toward the left and right. The four branch pipes of the side pipe portion 4d are provided, and the flow dividing wall 6 is formed in a cross shape correspondingly. The flow dividing wall 6 is disposed in the lower part of the charging container 2 and is connected to each branch pipe (left pipe part 4a, right pipe part 4b, front pipe part 4c, rear pipe part 4d) of the suction / discharge pipe 4. The internal space below the input container 2 is partitioned. Each inner compartment space below the input container 2 partitioned by the flow dividing wall 6 has a lower end side (a lower discharge port 2a side) communicating with only one branch pipe corresponding to the internal partition space. As a result, four slurry pumps can be connected to one slurry supply hopper 1 and used, and slurry can be prevented from clogging the lower discharge port 2 a at the lower end of the charging container 2 by the flow dividing wall 6.

  The four branch pipes (the left pipe section 4a, the right pipe section 4b, the front pipe section 4c, and the rear pipe section 4d) are arranged radially symmetrically with respect to the center of the lower discharge port 2a at the lower end of the input container 2. It is installed. Correspondingly, the flow dividing wall 6 is also formed radially symmetrically with respect to the center of the lower discharge port 2a. Thereby, the flow of the slurry of each division space of the lower part of an input container is equalized, and clogging can be prevented more effectively.

  In the present embodiment, the suction / discharge pipe 4 is branched into four branch pipes (left pipe section 4a, right pipe section 4b, front pipe section 4c, and rear pipe section 4d). The tube 4 may be divided into three or five or more.

  FIG. 9 is a cross-sectional view of a slurry supply hopper according to Embodiment 4 of the present invention. The slurry supply hopper 1 according to this embodiment is characterized in that vibration devices 9 and 9 are provided on the lower outer surface of the charging container 2. Other configurations are the same as those in the second embodiment. The vibration devices 9 and 9 are devices that vibrate the lower part of the charging container 2. The vibration devices 9 and 9 also vibrate the lower part of the charging container 2 so that the solid components in the slurry adhering to the inner wall of the charging container 2 are separated by vibrations due to friction, thereby preventing clogging more effectively. can do.

DESCRIPTION OF SYMBOLS 1 Slurry supply hopper 2 Input container 2a Lower discharge port 3 Frame 4 Suction discharge pipe 4a Left side pipe part 4b Right side pipe part 4c Front side pipe part 4d Rear side pipe part 5 Pipe joint 6 Split wall 7 Slurry 8 Connection part 9 Excitation device

Claims (3)

A hopper for supplying slurry to a suction port of a slurry pump,
An input container having an upper end and a lower end opened and formed in a funnel shape;
A plurality of suction / discharge pipes connected to a lower end of the input container and connected to the suction port of the slurry pump;
A flow dividing wall that is disposed at a lower portion of the input container and divides an inner space of the lower portion of the input container with respect to each of the suction and discharge pipes, and
Each of the suction / discharge pipes is disposed so as to be axially symmetric with respect to the central axis of the charging container, and is disposed in a direction perpendicular to the central axis of the charging container,
The slurry supply hopper characterized in that each of the internal compartment spaces below the input container divided by the flow dividing wall communicates only with the one suction / discharge pipe corresponding to the internal compartment space.   2. The slurry supply hopper according to claim 1, wherein each of the suction and discharge pipes is a curved pipe curved outward from the center of the charging container. Claim 1 or 2 slurry feed hopper wherein it comprises a vibrating device for vibrating the bottom of the closing container.