JP5127734B2 - Powder replenishment facility and quick setting agent replenishment facility - Google Patents

Description

  The present invention relates to a facility for replenishing powder in a powder tank that contains powder such as a quick setting agent.

  For example, in the case of tunnel excavation such as the NATM construction method, when spraying mortar or concrete for the purpose of preventing collapse of a natural ground, a powder rapid setting agent is added to the mortar or concrete. The addition amount of the quick setting agent is appropriately determined from the field conditions such as the amount of mortar sprayed and the amount of rebound of concrete. The quick setting agent is usually stored in the quick setting agent tank, and the quick setting agent in the quick setting agent tank has been supplied manually by humans. Replenishment that had been being considered.

  Currently, this quick setting agent replenishment facility consists of a replenishment tank that stores the quick setting agent to be supplied to the quick setting agent tank, and a quick setting agent supply pipe to which the quick setting agent contained in the replenishment tank is sent. There has been proposed one provided with a transport channel as an element and a blower for blowing transport air into the transport channel (see, for example, Patent Document 1 and Patent Document 2). In this quick setting agent replenishment facility, the quick setting agent introduced into the supply tank from a flexible container or the like was sent into the transfer channel, and the quick set agent sent into the transfer channel was blown from the blower. It is transported into the quick setting agent tank by the transfer air, and is supplied into the quick setting agent tank. In this quick setting agent tank, the air used for transferring the quick setting agent is exhausted through a filter provided in an air exhaust section fixed to the quick setting agent tank, while the quick setting agent is temporarily After being accommodated in the binder tank, it is conveyed to, for example, a spraying device by air.

According to the already proposed quick setting agent replenishment facility, it is not necessary to supply the quick setting agent manually in the quick setting agent tank, which is very useful. However, this already proposed quick-setting agent replenishment facility requires further improvement.
That is, the quick setting agent tank which supplies a quick setting agent is an existing facility, and usually has a height of about 3 to 4 m. Moreover, the air exhaust part which has a filter usually has a weight of about 60 to 70 kg, and is fixed after being placed on the top of the quick setting agent tank. Therefore, according to the already proposed quick-setting agent replenishment facility, it is necessary to lift the air exhaust part, which weighs 60 to 70 kg, to a height of about 3 to 4 m, which requires a lot of heavy labor for installation and removal. become. When the powder is other than the quick setting agent, the height of the powder tank can vary, but it is necessary to lift the air exhaust part having a weight of 60 to 70 kg to the top of the powder tank. Yes, it is the same that a lot of hard work is required for installation and removal.

JP 2006-104826 A JP 2006-104827 A

  The main problem to be solved by the present invention is to provide a powder replenishing facility and a quick setting agent replenishing facility that do not require heavy labor for installation, removal and the like.

The present invention that has solved this problem is as follows.
[Invention of Claim 1]
A facility for replenishing powder in a powder tank having a powder replenishing port,
A replenishment tank having an inlet for the powder, a transport passage through which the powder in the replenishment tank is fed, and a compressor or blower for blowing transport air into the transport passage,
A powder replenishing facility in which the powder fed into the transport channel is configured to be transported into the powder tank by the transport air,
A lid device fixed to the powder tank so as to cover the replenishing port, a return passage communicating with an exhaust port formed in the lid device, and a collection air through which exhaust air passing through the return passage is guided. And dust means,
The exhaust powder discharged from the exhaust port together with the exhaust air is guided to the dust collecting means, and the discharged powder collected by the dust collecting means is returned to the replenishing tank.
Powder replenishment facility characterized by that.

[Invention of Claim 2]
A fixed amount feeder is provided at the bottom of the replenishing tank, and the powder in the replenishing tank is fed into the transport channel by the fixed amount feeder.
The powder supply facility according to claim 1.

[Invention of Claim 3]
The dust collecting means includes
A capture container that receives the exhaust air and the exhaust powder, and a filter that is disposed in the capture container and that allows the exhaust air to pass therethrough and does not allow the exhaust powder to pass through the exhaust container. On the other hand, the discharged powder that does not pass through the filter stays in the capture container, and the discharged powder that remains in the capture container passes into the supply tank through the discharge port formed in the capture container. It is assumed that it can be dropped,
The powder supply equipment according to claim 1 or 2.

[Invention of Claim 4]
The discharge port is located in the replenishment tank. The replenishment tank is provided with an opening / closing body capable of opening and closing the discharge port. When the opening / closing body is pushed up by push-up air from the compressor or the blower, the discharge port is provided. It is configured to close the exit,
The powder supply facility according to claim 3.

[Invention of Claim 5]
A dust removal passage for guiding dust removal air from the compressor or the blower into the supply tank is provided;
In charging the powder into the replenishment tank from the inlet,
Dust-removing air is blown into the replenishing tank, and the powder in the air together with the air in the replenishing tank is led into the capture container through the discharge port, and the air led from inside the replenishing tank is the filter. On the other hand, the powder guided from within the replenishing tank that does not pass through the filter remains in the capture container.
The powder supply equipment according to claim 3 or 4.

[Invention of Claim 6]
The lid device is
An inner tube connected to the transfer channel, the tip opening being located in the powder tank and the axis being parallel to the axis of the powder tank;
An outer tube that is arranged coaxially with the inner tube and in which the exhaust port is formed in the peripheral wall;
The powder and the carrier air from the inside of the replenishing tank are replenished into the powder tank from the opening of the tip of the inner tube, and the air in the powder tank is exhausted from the exhaust port through the outer tube. It is said that
The powder supply equipment according to any one of claims 1 to 5.

[Invention of Claim 7]
It is a facility for replenishing the quick setting agent in the quick setting agent tank having the quick setting agent supply port,
A replenishment tank having an inlet for the quick setting agent, and a transport channel through which the quick setting agent in the replenishing tank is fed,
The quick setting agent supplied into the transfer channel is configured to be transferred into the quick setting agent tank by transfer air.
A lid device fixed to the quick setting agent tank so as to cover the replenishing port, a return passage communicating with an exhaust port formed in the lid device, and a collection air through which exhaust air passing through the return passage is guided. Dust means, and connection means for connecting the transport flow path to a compressor provided in the quick-setting agent tank,
The carrier air is blown into the carrier channel by the compressor,
The discharge quick setting agent discharged from the exhaust port together with the exhaust air is guided to the dust collecting means, and the discharge quick setting agent collected by the dust collecting means is returned to the supply tank. Yes,
Quick setting agent replenishment facility characterized by that.

  According to the present invention, a powder replenishing facility and a quick-setting agent replenishing facility that do not require heavy labor for installation, removal, and the like.

It is an equipment flow figure of a powder supply equipment. It is a schematic cross section of the II-II line equivalent part of FIG. It is another example of a powder dust removal structure.

Next, an embodiment of the present invention will be described.
As shown in FIG. 1, the powder replenishing facility 10 of the present embodiment is a facility for replenishing a powder tank 100 with powder F such as a quick setting agent, a thickener, a flocculant, and a fireproof spray. This powder tank 100 is an existing tank installed in advance adjacent to or as a part of a spraying device for spraying material such as concrete or mortar.

  The powder F in the powder tank 100 is sent out from the powder tank 100 by, for example, compressed air, and then added to the spray material, and then the inner wall surface of the tunnel, the slope, the furnace It is sprayed on various spraying target surfaces such as inner walls, fire walls, and steel frames.

  When the powder F is a quick setting agent, that is, when the powder tank 100 is a quick setting agent tank, a compressor is usually attached to the quick setting agent tank (100). The quick setting agent (F) in the quick setting agent tank (100) is sent out by the compressed air.

  The shape of the powder tank 100 is not particularly limited. For example, as in the illustrated example, the upper side is cylindrical, and the lower side has a substantially conical shape that tapers downward. is there. However, the powder tank 100 is provided with a powder F replenishing port 101 that can be opened and closed by a lid material (not shown) on the top surface. The powder F accommodated in a flexible container or the like can be supplied from the supply port 101 to supply the powder F into the powder tank 100. However, such manual labor (manpower) replenishment is heavy labor and the dust of the powder F flies, resulting in poor work efficiency and low safety. Therefore, the powder replenishing facility 10 of this embodiment is used for the purpose of facilitating, safety, and speeding up the work.

  The powder replenishing facility 10 according to the present embodiment includes a replenishing tank 20 that contains the powder F, and a metal pipe or a flexible hose into which the powder F accommodated in the replenishing tank 20 is fed. A flow path 30 and a compressor or blower for blowing the transport air A <b> 1 into the transport flow path 30, in the illustrated example, a compressor 40 are provided.

  However, when the powder F is a quick setting agent, that is, when the powder tank 100 is a quick setting agent tank, and the compressor is attached to the quick setting agent tank (100), the compressor 40 is Without connecting, it is provided with connecting means such as a hose band, a coupler, a victoic joint, etc. (not shown) for connecting the conveyance flow path 30 to the compressor provided together, and is conveyed into the conveyance flow path 30 by the compressor provided therewith. It is preferable that air A1 is blown in. The compressor provided is usually equipped with a dryer for drying the compressed air so that the pressure-accelerated quick-setting agent will not absorb moisture and solidify. Since it is already used for pumping the agent, its reliability is high. Therefore, the use of the compressor provided together increases the reliability and stability of quick setting agent replenishment (conveyance), and it is not necessary to provide a separate compressor, which is excellent in terms of equipment cost, equipment area, and the like.

  On the other hand, the shape of the replenishing tank 20 is not particularly limited as in the case of the powder tank 100. For example, as shown in the illustrated example, the upper side is cylindrical and the lower side tapers downward. The substantially conical shape can be obtained. The top surface 20 a of the replenishing tank 20 is provided with a powder F charging port 21, and the powder F stored in a flexible container or the like can be charged into the replenishing tank 20 from the charging port 21. . The inlet 21 is normally opened and closed by a lid 21A or the like in order to prevent the powder F stored in the replenishing tank 20 from being wet or to prevent the powder F from leaking as dust from the inlet 21. To be able to.

In this embodiment, the capacity of the replenishing tank 20 is not particularly limited, and can be appropriately designed in consideration of the capacity of the powder tank 100, the performance of the compressor 40, the installation allowable area, and the like. For example, when the capacity of the powder tank 100 is 0.2 to 0.4 m ³ , the capacity of the replenishing tank 20 is 1.2 to 2.4 m ³ and the powder F is accommodated in 1 to 2 t (tons). Can be able to.

  In this embodiment, a stirring blade 22 is provided at the bottom of the replenishing tank 20. The stirring blade 22 rotates around the central axis C <b> 1 of the replenishment tank 20, and stirs the powder F stored at the bottom of the replenishment tank 20 at a high speed. Due to this high-speed stirring, even if the powder F has a high hygroscopic property such as a quick setting agent, a floc, a bridge, a clinker ball (consolidated ball), etc. may be formed in the replenishing tank 20. Disappears. The agitating blade 22 can be installed together with the aeration described later, can be installed in place of the aeration, or can be omitted.

  Agitation of the powder F can be performed by, for example, aeration. The specific method of this aeration is not particularly limited, and in the illustrated example, the replenishing tank passes through the branch path 35 branched from the transport base path 33 connected to the air outlet of the compressor 40 via a check valve (not shown). Compressed air is blown into the inside 20.

  How the branch path 35 is connected to the supply tank 20 is not particularly limited. In this embodiment, as shown in FIGS. 1 and 2, the tip of the branch path 35 is branched into two upper and lower stages, and the lower branch path 35 </ b> A is formed with a powder F delivery port 31 </ b> A. It is connected to the replenishing tank 20 on the side opposite to the side (the right side in the drawing in the illustrated example) (the left side in the illustrated example). On the other hand, the upper branch path further branches into four branch paths 35B, 35C, 35D, and 35E, and these branch paths 35B to 35E are connected to the supply tank 20 from four directions at equal intervals.

  In this embodiment, the powder F in the replenishment tank 20 is prevented from forming a bridge or the like by the compressed air blown from the upper branch paths 35B to 35E, and smoothly slides down in the replenishment tank 20 toward the bottom. .

  Further, the powder F in the replenishing tank 20 normally deposits on the side opposite to the side on which the powder F delivery port 31A is formed. There is a possibility that F is pressed and formed to form a flock or the like. However, in the present embodiment, the accumulated powder F is blown toward the delivery port 31A by the compressed air blown from the lower branch passage 35A, so there is no possibility of forming a flock or the like.

  The position where the lower branch path 35A and the upper branch paths 35B to 35E are arranged in the vertical direction is not particularly limited. For example, based on the amount of powder F accommodated, the nature of the powder F, and the like, It can be determined as appropriate.

  In addition to the above, in order to prevent bridging or the like, for example, the replenishment tank 20 may be provided with a hammering means or the like.

  In this embodiment, a quantitative feeder 23 such as a rotary feeder is provided at the bottom of the replenishing tank 20. With this quantitative feeder 23, the powder F can be stirred at a high speed and quantitatively cut out. By this quantitative cutting, the powder F in the replenishing tank 20 is sent into the transport channel 30. The powder fed into the transport channel 30 is denoted by reference numeral F1.

  Here, in the quick setting agent replenishment facility proposed in Patent Document 1 and Patent Document 2 described above, a quick setting agent supply pipe which is a component of the transport channel (30) is provided in the replenishment tank (20). The powder (F) accommodated in the bottom of the replenishing tank (20) is fed into the quick setting agent supply pipe. In the facility, the powder (F) is fed in as air or the like blown from the bottom of the replenishing tank (20) is blown into the quick setting agent supply pipe.

  However, according to this already proposed form, for example, when a clinker ball (consolidated ball) of powder (F) is formed, the powder (F) of the quick setting agent supply pipe is formed by this clinker ball. There is a possibility that the inlet (opening) into which is fed will be blocked. When the inlet is closed, the powder (F) in the replenishing tank (20) is not conveyed into the powder tank 100.

  On the other hand, when the powder F in the replenishment tank 20 is sent into the transport flow path 30 by the quantitative feeder 23 as in this embodiment, for example, when a rotary feeder is used as the quantitative feeder 23 The powder F in the replenishing tank 20 is accommodated between the blades of the rotary feeder and is tangibly agitated (in addition, agitation with air such as aeration is referred to as intangible agitation). Thus, there is no risk of a conveyance failure due to, for example, stable and continuous delivery and conveyance.

  The powder F1 fed into the transport flow path 30 as described above is transported into the powder tank 100 by the transport air A1 blown from the compressor 40. Here, the configuration of the transport flow path 30 is not particularly limited, and in this embodiment, the transport base path 33 connected to the compressor 40, the transport communication path 36 that is sequentially communicated with the transport base path 33, and the pipe The body 31 and the hose 32 are included.

  The conveyance base 33 is provided with a pressure reducing valve 32A and a pressure gauge 32B. The branch path 35 is branched in the downstream of the pressure gauge 32B, and the conveyance communication path 36 is in the downstream of the branch point 35. Communicate. The pressure reducing valve 32A reduces the pressure of the carrier air A1 blown from the compressor 40 at a pressure of, for example, 500 to 1000 kPa, for example, to 40 to 50 kPa.

  In the present embodiment, the branch path 35 and the transport communication path 36 are communicated with the transport base path 33 in this order. However, the transport communication path 36 and the branch path 35 may be communicated in this order.

  Moreover, the conveyance flow path 30 makes the pipe body 31 which is the part into which the powder F1 is sent made of metal, and a hose 32 communicated on the distal end side (powder tank 100 side) of the pipe body 31 is made of, for example, PVC. It is preferable that the end portion of the hose 32 is made to communicate with an inner tube 51 of the lid device 50 described below. According to this embodiment, the distance from the replenishment tank 20 to the powder tank 100 can be adjusted by bending the hose 32 as appropriate. The length of the hose 32 is not particularly limited, and can be 5 to 20 m, for example.

  The powder supply facility 10 of this embodiment includes a lid device 50 that is fixed to the powder tank 100 so as to cover the supply port 101. The lid device 50 can be fixed to the powder tank 100 in place of the lid material for opening and closing the supply port 101 described above.

  An exhaust port 53 is formed in the lid device 50, and a return flow path 60 composed of a pipe communicating with the exhaust port 53, a flexible hose or the like, and an exhaust air passing through the return flow path 60. The dust supply means 70 to which A2 is guided is provided in the powder supply facility 10 of this embodiment. As the flexible hose constituting the return flow path 60, for example, the same flexible hose 32 constituting the above-described transport flow path 30 can be used. The distance to the dust collecting means 70 can be adjusted.

  In this embodiment, the discharged powder F2 discharged from the exhaust port 53 together with the exhaust air A2 is guided to the dust collecting means 70, and the discharged powder F2 collected by the dust collecting means 70 is placed in the replenishing tank 20. Returned. According to this embodiment, the discharged powder F2 discharged from the exhaust port 53 is collected by the dust collecting means 70, and the lid device 50 fixed to the powder tank 100 is provided with dust collecting means such as a filter. For example, it becomes light with 20-30 kg. Therefore, according to the powder replenishing facility 10 of this embodiment, heavy labor is not required for installation and removal of the lid device 50.

  In this embodiment, when the amount of the powder F stored in the powder tank 100 increases, a part of the powder F is discharged together with the exhaust air A2 from the exhaust port 53 (this discharged powder). Therefore, it is preferable to provide a level sensor 59 for knowing that the stored powder F has reached a predetermined capacity.

On the other hand, the structure of the dust collecting means 70 for collecting the discharged powder F2 and the structure for returning the discharged powder F2 collected by the dust collecting means 70 to the replenishing tank 20 are not particularly limited. Such a structure is preferable.
That is, the dust collecting means 70 of the present embodiment receives the exhaust air A2 and the exhausted powder F2, and is disposed in the capture container 71, for example, a capture container 71 having a substantially cubic shape, a substantially rectangular parallelepiped shape, a substantially cylindrical shape, or the like. And a filter 72 made of, for example, a cylindrical bag filter. As the filter 72, a filter that allows the exhaust air A2 to pass therethrough but does not allow the discharged powder F2 to pass therethrough is used.

  The exhaust air A2 that has passed through (passed through) the filter 72 is exhausted through an exhaust pipe 73 made of a metal pipe or the like provided on the top side of the capture container 71. On the other hand, the discharged powder F2 that does not pass through the filter 72 remains in the capture container 71, for example, by being deposited on the bottom 71a of the capture container 71. The discharged powder F2 remaining in the capture container 71 is then freely dropped into the supply tank 20 through the discharge port 74 formed in the bottom 71a of the capture container 71, and then returned to the supply tank 20.

  The structure for returning the discharged powder F2 into the supply tank 20 is not particularly limited. For example, as in the present embodiment, the discharge port 74 is opened and closed by an opening / closing body 80 such as a damper, and in addition, the top of the supply tank 20 It can be set as the structure where the inclination board 81 in which the opening 20X side formed in the surrounding wall inclines below is provided below the discharge port 74. As shown in FIG. The opening / closing body 80 of this embodiment mechanically rotates about the hinge 80A and opens / closes the discharge port 74 in accordance with this rotation.

  According to this embodiment, the discharged powder F2 remains in the capture container 71 while the discharge port 74 is closed by the opening / closing body 80, and then the opening / closing body 80 rotates to open the discharge port 74. When it is, it falls freely onto the inclined plate 81 through the discharge port 74. The discharged powder F2 that has fallen freely slides on the inclined plate 81 toward the replenishing tank 20, and freely falls into the replenishing tank 20 through the opening 20X formed in the top peripheral wall of the replenishing tank 20. That is, according to this embodiment, it is only necessary to operate the opening / closing body 80 to return the discharged powder F2 into the supply tank 20. Therefore, in returning the discharged powder F2 into the replenishing tank 20, an increase in manufacturing cost can be suppressed.

  As another structure for returning the discharged powder F2 into the supply tank 20, as shown in FIG. 3, a discharge port 74 formed in the bottom 71a of the capture container 71 is located in the supply tank 20, A form in which an opening / closing body 80 made of a lift damper or the like that can open / close the discharge port 74 is provided in the supply tank 20. When the opening / closing body 80 in this form is pushed up by, for example, air from the compressor 40 (hereinafter, also simply referred to as “push-up air”), the discharge port 74 is closed (closed), while the push-up by the push-up air is stopped. Then, as shown in an enlarged view in FIG. 3, the discharge port 74 is separated from the discharge port 74 so that the discharge port 74 is opened. According to this embodiment, the discharged powder F2 stays in the capture container 71 while the discharge port 74 is closed by the opening / closing body 80, and then the opening / closing body 80 is separated from the discharge port 74 and the discharge port 74 is opened. When released, it falls freely into the supply tank 20 through the discharge port 74. That is, according to the present embodiment, it is only necessary to operate the opening / closing body 80 to return the discharged powder F2 to the supply tank 20. In particular, in the present embodiment, the compressor 40 used for conveying the powder F1 to be replenished for the operation (drive) of the opening / closing body 80 is used as it is. Therefore, according to this embodiment, in returning the discharged powder F2 into the replenishing tank 20, an increase in manufacturing cost can be suppressed and an increase in installation area can also be suppressed.

  In this embodiment, how the push-up force by push-up air is applied to the opening / closing body 80 is not particularly limited. For example, as shown in the figure, a push-up flow path 37 through which push-up air A3 connected to the outlet of the compressor 40 and the like passes is provided, and a tip end portion 37a of the push-up flow path 37 is inserted into the replenishment tank 20, and the tip For example, the opening of the portion 37a may be sealed by an opening / closing body 80 that can be expanded and contracted in the vertical direction. According to this embodiment, the opening / closing body 80 can be efficiently operated (driven) up and down.

  By the way, when the powder F stored in a flexible container or the like is charged from the charging port 21 of the replenishment tank 20, the charged powder F spreads in the air in the replenishment tank 20, and the spread powder F However, for example, when a flexible container or the like is removed from the insertion port 21, there is a risk of leaking to the outside as dust. The powder (F) leaked to the outside as this dust, for example, when it is a quick setting agent, is strongly alkaline and may cause burns if it adheres to a person who sweats, etc. For this reason, if it adheres to the switchboard, the device may short-circuit and fail. However, in this embodiment, it is possible to prevent the powder F from leaking to the outside as dust by further using the compressor 40 used above.

  Specifically, first, a dust removal passage (not shown) that guides air from the compressor 40 (hereinafter also simply referred to as “dust removal air”) into the supply tank 20 is provided. This dust removal passage is connected to, for example, the outlet of the compressor 40 and the tip is inserted into the supply tank 20 or the tip opening is opened at the peripheral wall of the supply tank 20. Note that the insertion position and opening position of the dust removal passage in the vertical direction can be appropriately set depending on the amount of the powder F introduced.

  In this embodiment, when the powder F is charged into the replenishing tank 20 from the charging port 21, the opening / closing body 80 is appropriately operated to open the discharge port 74, and dust removal air is supplied into the replenishing tank 20 through the dust removal passage. Infuse. Thereby, the powder F in the air together with the air in the replenishment tank 20 is guided into the capture container 71 through the discharge port 74. The air introduced into the capture container 71 is exhausted through the filter 72. On the other hand, the powder F that does not pass through the filter 72 adheres to the filter 72 and stays in the capture container 71 or slides down on the inclined plate 81 and returns to the supply tank 20. In this way, since the powder F spreading in the air in the replenishment tank 20 is removed, the opening / closing body 80 is operated to close the discharge port 74 and enter the replenishment tank 20 through the dust removal passage. By stopping the blowing of the dust removal air, the powder F is prevented from leaking to the outside as dust when the flexible container or the like is removed from the insertion port 21, for example.

  In addition, when charging the powder F into the replenishing tank 20, it is preferable that a flexible container or the like is closely attached to the charging port 21 so that the dust of the powder F does not leak from this portion to the surroundings. In addition, when the powder F is charged, instead of a form in which dust removal air is blown into the replenishment tank 20 through the dust removal passage, a form in which the inside of the replenishment tank 20 is maintained at a negative pressure can be employed. As a method of keeping the inside of the replenishment tank 20 at a negative pressure, for example, a method of providing a suction blower 73X in the middle of the exhaust pipe 73 and sucking the inside of the catching container 71 and the replenishment tank 20 by this blower 73X is considered. It is done.

  On the other hand, as shown in FIG. 1, the lid device 50 of the present embodiment has the tip end opening 51 a located in the powder tank 100 and more than half of the axis (length reference) is the axis of the powder tank 100. An inner pipe 51 that communicates with (communicates with) the conveyance flow path 30 arranged parallel to the core, and an outer pipe 52 that is arranged coaxially with the inner pipe 51 and that has an exhaust port 53 on the peripheral wall. Have.

  When this lid device 50 is used, the powder F1 from the replenishing tank 20 is replenished into the powder tank 100 from the front end opening 51a of the inner tube 51, and the conveying air A1 also flows into the powder tank 100 at the same time. (Blown in). In addition, the air in the powder tank 100 is exhausted from the exhaust port 53 through the outer tube 52 when the carrier air A1 flows through the inner tube 51. Therefore, in the powder tank 100, an air flow that rises mainly in the radial direction is generated, and this upward air flow is formed in a spiral shape by the exhaust port 53 being formed in the peripheral wall of the outer tube 52. become. Therefore, the powder F1 replenished in the powder tank 100 draws a spiral, collides with the peripheral wall of the powder tank 100, falls free, and accumulates at the bottom of the powder tank 100. On the other hand, the air is exhausted from the exhaust port 53 through the outer tube 52, and the powder F1 and the air are efficiently separated. Moreover, in order to obtain this effect, it is not necessary to make a complicated modification or the like to the powder tank 100, and the lid device 50 of this embodiment is used as it is instead of an existing lid material (not shown) provided in the powder tank 100. Installation is extremely easy because only installation is required.

  Here, the position of the front end opening 51a of the inner pipe 51 (position in the vertical direction of the powder tank 100) can be appropriately designed from the viewpoint of efficiently generating such airflow, and is not particularly limited. In this regard, generally, when the tip end opening 51a is positioned too much below, it is deposited (accommodated) under the influence of the transfer air A1 blown out from the tip end opening 51a of the inner pipe 51. ) There is a possibility that the powder F rises and is discharged from the exhaust port 53 through the outer tube 52. However, in the present embodiment, since the carrier air A1 rises while spreading mainly in the radial direction, the tip end opening 51a can be positioned below the normal. When the tip opening 51a is positioned below, even if the powder F1 that has flowed into the powder tank 100 from the inner tube 51 rides on the ascending current, the ascending distance becomes long and spreads in the radial direction. Since it becomes easy to collide with the surrounding wall of the powder tank 100, the powder F and air are more efficiently separated.

  However, depending on the pressure / flow rate of the carrier air A1, the diameter / capacity of the powder tank 100, etc., before the powder F1 replenished in the powder tank 100 collides with the peripheral wall of the powder tank 100, that is, the carrier air. Before being separated from A1, there is a possibility that the carrier air will fall free together with the carrier air A1. In this case, since the powder F deposited (accommodated) at the bottom of the powder tank 100 rises, the amount of the discharged powder F2 discharged from the exhaust port 53 increases, and the replenishment efficiency decreases. Therefore, in such a case, as shown in the illustrated example, the distal end portion 51a of the inner tube 51 faces the peripheral wall of the powder tank 100 by bending the distal end portion of the inner tube 51 or by interposing another member. It is preferable to do so.

  Further, when the tip of the inner tube 51 is not bent, if the amount of powder F accumulated (accommodated amount) increases in the powder tank 100, the powder deposited on the tip opening 51 a of the inner tube 51. A part of the powder F accommodated by the carrier air A1 blown out from the inner pipe 51 rises as the distance from F becomes shorter. Since the so-called powder F is discharged together with the exhaust air A2 exhausted from the exhaust port 53, the replenishment efficiency is lowered. Therefore, as in the present embodiment, it is preferable to provide a level sensor 59 and stop the quantitative feeder 23 when the level sensor 59 detects that the accumulation amount of the powder F has reached a predetermined accumulation amount. It is.

  The amount of powder F deposited can also be grasped by removing the lid device 50 and looking into the powder tank 100 from the replenishing port 101 of the powder tank 100. In this embodiment, the lid device 50 is reduced in weight, and since the lid device 50 can be easily removed and installed, such work is also easy. However, if there is no problem in terms of equipment costs, etc., it is preferable to provide the level sensor 59.

  In the powder supply facility 10 of the present embodiment, the compressor 40 is used to supply the carrier air A1, but a blower can also be used. When a compressor is used, it has an advantage that it is easy to maintain, and when a blower is used, it has an advantage that it is easy to prevent moisture absorption of the powder F.

  Further, in this embodiment, in order to eliminate moisture absorption of the powder F, for example, a connection portion between the conveyance flow path 30 and the inner pipe 51, or a connection between the return flow path 60 and the outer pipe 52 or the dust collecting means 70. It is preferable to make the part liquid-tight (to prevent liquid from passing through) to form a completely closed loop.

  Furthermore, the powder replenishing facility 10 according to the present embodiment can be considered to be loaded on a single truck or the like and easily moved to a place where the powder tank 100 is installed.

[Operation of powder supply equipment]
Next, operation | movement of the powder supply equipment 10 of this form is demonstrated, referring FIG.
When the powder F is supplied into the powder tank 100 using the powder supply facility 10 of this embodiment, the powder F is supplied into the supply tank 20 from the input port 21 in advance. At this time, as described above, the dust removal air from the compressor 40 is introduced into the replenishment tank 20 through the dust removal passage, or suctioned by the blower 73X, and the replenishment tank is utilized using the dust collecting means 70. It is preferable to prevent the powder F spreading in the air within 20 from leaking to the outside.

  If the powder F is in such a state that the powder F is accommodated in the replenishing tank 20 by such charging, first, the compressor 40 is started or the powder tank 100 is attached. The conveyance channel 30 is connected to the compressor that is connected by using a connecting means, and the compressor that is provided side by side is started. At this time, the opening / closing body 80 keeps the discharge port 74 closed.

  Next, blowing by the compressor 40 or the like is started. At this time, the valve V1 provided in the middle of the branch path 35, the valve V2 provided in the middle of the conveying communication path 36, and the valve V4 interposed between the tube 31 and the hose 32 are opened, The valve V3 provided in the middle of the direct connection path 34 connecting the conveyance base path 33 and the hose 32 and the return flow path 60 are branched from the middle of the pressure release path 38 connected to the top surface 20a of the replenishing tank 20. The provided valve V5 is kept closed. As a result, the carrier air A1 flows in the carrier flow path 30, the exhaust air A2 flows in the return flow path 60, and the compressed air for aeration flows in the branch path 35.

  Here, the kind of valve | bulb V1-V5 is not specifically limited, For example, an electromagnetic valve can be used. However, it is preferable to use a ball valve because it is strong against powder. In this embodiment, ball valves are used as the valves V1 to V5.

  At this time, for example, the stirring blade 22 can also be operated to start stirring of the powder F stored in the replenishing tank 20.

  When the above air flow is stabilized, for example, after about 7 seconds, the operation of the quantitative feeder 23 is started, and the powder F is quantitatively cut out. By this cutting, the powder F1 fed into the transport channel 30 is transported to the powder tank 100 by the transport air A1 and replenished into the powder tank 100.

  When this replenishment is performed for an appropriate time or until a full detection signal is received from the level sensor 59, the valves V1, V2 and V4 are closed, the quantitative feeder 23 is stopped, and the powder F1 to the conveying flow path 30 is stopped. Stop feeding.

  Next, the valves V3 and V5 are opened, and after an appropriate time, for example, about 5 seconds has elapsed after the quantitative feeder 23 is stopped, the blowing by the compressor 40 is also stopped. In this way, by switching the open valve and providing a time difference from when the quantitative feeder 23 is stopped to when the blowing is stopped, the powder F does not remain in the hose 32. In this case, it is more effective to perform flushing that repeats the start and stop of blowing as necessary. Further, by operating the air pulse means 75 provided in the trapping container 71 and sending pulsed air to the filter 72 from the exhaust side of the air, the discharged powder F2 adsorbed (attached) to the filter 72 can be removed. This prevents clogging of the filter 72 and eliminates the need to open the capture container 71 and clean it frequently. The operation of the air pulse means 75 can be performed for 5 to 10 seconds, for example.

  Of course, the clogging prevention of the filter 72 is not limited to the air pulse. For example, the filter 72 can be provided with a hammering means, and the hammering means can prevent the filter 72 from being clogged. In the case of air pulse or hammering, for example, the powder F can be functioned even during replenishment work, that is, in a state where air is flowing.

  When the above is completed, the opening / closing body 80 is operated to open the discharge port 74. Thereby, the powder F accumulated in the trapping container 71 falls freely through the discharge port 74, slides on the inclined plate 81, and further falls freely in the replenishing tank 20.

  The present invention is applicable as a facility for supplying powder to a powder tank that stores powder such as a quick setting agent.

  DESCRIPTION OF SYMBOLS 10 ... Powder supply equipment, 20 ... Supply tank, 21 ... Input port, 22 ... Stirring blade, 23 ... Metering feeder, 30 ... Conveyance flow path, 40 ... Compressor, 50 ... Lid device, 51 ... Inner pipe, 52 ... Out Pipe, 53 ... exhaust port, 60 ... return flow path, 70 ... dust collecting means, 71 ... trapping container, 72 ... filter, 74 ... discharge port, 80 ... open / close body, 100 ... powder tank, 101 ... supply port, A1 , A2, A3 ... Air, F, F1, F2 ... Powder, V1-V5 ... Valve.

Claims (7)

A facility for replenishing powder in a powder tank having a powder replenishing port,
A replenishment tank having an inlet for the powder, a transport passage through which the powder in the replenishment tank is fed, and a compressor or blower for blowing transport air into the transport passage,
A powder replenishing facility in which the powder fed into the transport channel is configured to be transported into the powder tank by the transport air,
A lid device fixed to the powder tank so as to cover the replenishing port, a return passage communicating with an exhaust port formed in the lid device, and a collection air through which exhaust air passing through the return passage is guided. And dust means,
The exhaust powder discharged from the exhaust port together with the exhaust air is guided to the dust collecting means, and the discharged powder collected by the dust collecting means is returned to the replenishing tank.
Powder replenishment facility characterized by that. A fixed amount feeder is provided at the bottom of the replenishing tank, and the powder in the replenishing tank is fed into the transport channel by the fixed amount feeder.
The powder supply facility according to claim 1. The dust collecting means includes
A capture container that receives the exhaust air and the exhaust powder, and a filter that is disposed in the capture container and that allows the exhaust air to pass therethrough and does not allow the exhaust powder to pass through the exhaust container. On the other hand, the discharged powder that does not pass through the filter stays in the capture container, and the discharged powder that remains in the capture container passes into the supply tank through the discharge port formed in the capture container. It is assumed that it can be dropped,
The powder supply equipment according to claim 1 or 2. The discharge port is located in the replenishment tank. The replenishment tank is provided with an opening / closing body capable of opening and closing the discharge port. When the opening / closing body is pushed up by push-up air from the compressor or the blower, the discharge port is provided. It is configured to close the exit,
The powder supply facility according to claim 3. A dust removal passage for guiding dust removal air from the compressor or the blower into the supply tank is provided;
In charging the powder into the replenishment tank from the inlet,
Dust-removing air is blown into the replenishing tank, and the powder in the air together with the air in the replenishing tank is led into the capture container through the discharge port, and the air led from inside the replenishing tank is the filter. On the other hand, the powder guided from within the replenishing tank that does not pass through the filter remains in the capture container.
The powder supply equipment according to claim 3 or 4. The lid device is
An inner tube connected to the transfer channel, the tip opening being located in the powder tank and the axis being parallel to the axis of the powder tank;
An outer tube that is arranged coaxially with the inner tube and in which the exhaust port is formed in the peripheral wall;
The powder and the carrier air from the inside of the replenishing tank are replenished into the powder tank from the opening of the tip of the inner tube, and the air in the powder tank is exhausted from the exhaust port through the outer tube. It is said that
The powder supply equipment according to any one of claims 1 to 5. It is a facility for replenishing the quick setting agent in the quick setting agent tank having the quick setting agent supply port,
A replenishment tank having an inlet for the quick setting agent, and a transport channel through which the quick setting agent in the replenishing tank is fed,
The quick setting agent supplied into the transfer channel is configured to be transferred into the quick setting agent tank by transfer air.
A lid device fixed to the quick setting agent tank so as to cover the replenishing port, a return passage communicating with an exhaust port formed in the lid device, and a collection air through which exhaust air passing through the return passage is guided. Dust means, and connection means for connecting the transport flow path to a compressor provided in the quick-setting agent tank,
The carrier air is blown into the carrier channel by the compressor,
The discharge quick setting agent discharged from the exhaust port together with the exhaust air is guided to the dust collecting means, and the discharge quick setting agent collected by the dust collecting means is returned to the supply tank. Yes,
Quick setting agent replenishment facility characterized by that.

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