JPH03100274A - Pneumatic cut-out feeding device for rapid joining agent - Google Patents

Abstract

PURPOSE:To maintain the metering precision for a long period by installing an air blowing mechanism installed at the pocket group passing position in the side extension part of a feed wheel which is arranged in eccentricity and a spigot joint type sealing mechanism between a discharge mechanism. CONSTITUTION:A rapid joining agent A stored in a tank 1 is supplied into the pocket 31 of a feed wheel 3 which is arranged in eccentricity, and metered, and the wheel 3 is turned to obtain the communication between the side extension parts 110 and 120. When the axis line of an air nozzle 5a in the extension part 110 and the axis line of a machine side nozzle 6a in the extension part 120 coincide, the rapid joining agent A in the pocket 31 is supplied into a concrete transport passage from an air feeding hose 60 by an air blowing mechanism 5. In this case, the intrusion of the rapid joining agent A into the pocket 31 from the side part of the region is shielded by the spigot joint type sealing mechanisms 7a and 7b for a thick peripheral edge part 30. Therefore, the superior metering precision can be maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for cutting out and pneumatically conveying quick setting agents and similar powdery materials.

[Conventional technology and its technical issues]

When spraying concrete, powder quick-setting agents are often added for the purpose of increasing early strength. This powder quick-setting agent reacts vigorously with moisture, so it
As shown in Japanese Patent No. 199664, it is generally stored in a closed tank, cut out from it by a feed wheel, and pneumatically fed into a concrete pumping system using compressed air.

However, in the past, the feed wheel was rotatably built into the bottom of the sealed tank, and a compressed air blowing nozzle was installed at the bottom of the tank so that the tip could be placed in a pocket placed around the feed wheel's periphery. A discharge port is provided at the bottom of the sealed tank on the same axis as the compressed air blowing nozzle.
Metal liners (rubber seals cannot be used because of the strong alkali) are placed above and below the feed wheel at the cutting position, and clearance is set by tightening these with multiple bolts that pass through the plate thickness to prevent the intrusion of quick-setting agents. An attempt was made to seal the internal pressure air (approximately 5 kg/cd).

For this reason, there was a first-order problem.

■The cutting-out air blowing mechanism for the quick-setting agent is located in the tank, and the cutting-out air blowing mechanism is surrounded by the quick-setting agent.Moreover, the flat liner can be simply tightened with clamp bolts to connect the upper and lower surfaces of the thick peripheral part of the feed wheel. Since the clearance is only brought close to zero, the clearance increases due to wear of the flat liner. As a result, the quick-setting agent enters the cut-out passage from the side and is pneumatically transported, resulting in poor measurement accuracy and stability, increased consumption of expensive quick-setting agent, generation of dust, and deterioration of concrete quality. lower.

■Adjusting and checking the clearance of the cut-out air blowing mechanism was not easy and required a high degree of skill and time, and complicated bolt tightening required work.

■Since the quick-setting agent cutting and blowing mechanism is inside the tank, if the quick-setting agent reacts with the drain contained in the compressed air and causes a blockage, the sealed tank will be disassembled and the strong alkali inside the tank will be removed. The quick-setting agent must be removed and cleaned. For this reason, it was extremely time consuming and labor intensive, and also lacked safety.

The present invention was invented in order to solve the above-mentioned problems, and its purpose is to prevent the rapid setting agent from entering from unnecessary places and to achieve a good result without the need for complicated clearance adjustments. It is an object of the present invention to provide a pneumatic feeding device for cutting out quick-setting agents, which can maintain measurement accuracy over a long period of time, and which can be handled very simply and easily in the event of a blockage.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an airtight tank for accommodating quick-setting agents, a feed wheel having a group of pockets around the periphery for measuring the quick-setting agents in the tank, and a feed wheel for measuring the quick-setting agents in the pockets. A wheel casing is provided at the bottom of the tank with a mechanism for discharging compressed air using compressed air. The tank center axis and the eccentric feed wheel are arranged in a smooth manner.

An air blowing mechanism and a discharge mechanism are attached to the pocket group passing position in the thickness direction of the lateral extension part, and between the air blowing mechanism and the discharge mechanism, the upper and lower surfaces of the peripheral edge of the feed wheel are installed. A spigot-type sealing mechanism is provided for this.

The spigot-type seal mechanism preferably includes upper and lower wear-resistant pads having a passage hole that matches the pocket of the feedwheel and a curvature groove corresponding to the thick peripheral portion, and at least the lower wear-resistant pad is preferably pushed up by a bias. Furthermore, it is preferable that an upper cover with an air blowing mechanism is disposed on the upper wear-resistant pad, and that the upper cover is fixed to the side extensions by a rotatable pressing mechanism. This results in
Tightening with lamp bolts does not require complicated operations, and the cutting mechanism can be easily disassembled.

Further, a structure in which a cleaning opening is formed in the body of the closed tank and an opening/closing lid is airtightly attached to the opening is also suitable. When this structure is adopted, even in the worst case, the remaining amount of quick setting agent in the closed tank can be easily removed.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 3 show the entire device for cutting out and pneumatically discharging quick setting agents according to the present invention, and FIGS. 4 to 11 show details of each part.

In Figures 1 to 3, 1 is a sealed tank;
Main body 1a and feed wheel case 1 that also serves as a bottom member
It consists of b. The sealed tank 1 is provided with an input port 1°O at the top for charging the quick-setting agent A, and is configured to be airtightly closed with an opening/closing lid 101. A feed wheel 3 as a measuring means is built into the feed wheel case 1b.

2 is a support frame that supports the sealed tank 1, and a drive mechanism 2o that rotates a feed wheel (described later) at a variable speed.
The whole including this drive mechanism 20 is a load cell 20.
It is supported by the base 201 via 0,200.

Reference numeral 4 denotes a cutting device which is a feature of the present invention, and is arranged outside the closed tank 1. Figures 4 to 6 show the details. First, feed wheel case 1b
As shown in FIG. 4, FIG. 5, and FIG. A lower plate 12 having an extending portion 120, a frame plate 13 having a U-shape in plan for connecting the upper and lower portions of the lower plate 12 and the upper plate 11 to define a feed wheel storage chamber, and the lateral extensions. Exit 11o.

120 is provided with an end plate 14 that closes the end face on the gable side.

As shown in FIG. 5, the main body 1a of the sealed tank 1 has an oval or elliptical lower opening 102 with a shorter diameter on the side extending side, and the upper plate 11 also has a lower opening 102 having the same shape as the lower opening 10. A window 111 is formed, and a flange 112 is formed on the outside of the window 111.
is formed, and a flange 10 at the bottom of the sealed tank body is attached to this.
are overlapped and integrated by tightening with bolts.

The feed wheel 3 has a disk shape and is arranged in the feed wheel storage chamber. Specifically, as shown in FIGS. 4 and 4a, the feedwheel 3 has a thick peripheral edge 3o, in which pockets 31 for measuring are provided at required intervals, and A relatively short flange 300 is formed on the side.

The conventional feedwheel was arranged concentrically with the closed tank; however, in the present invention, the center C1 is located partially in the lateral extension zone, as is clear from FIGS. 4 and 5. Eccentric by the required distance from the center C2 of the sealed tank 1,
A rotating shaft 3 extending from the center opening of the lower plate 12 at the eccentric position
A conductive element connected to a and attached thereto communicates with the drive mechanism 20. A cone 32 is attached to the upper surface of the feed wheel 3, and an agitator 33 extending into the tank is provided on the cone 32.

The side extending portions 110, 120 have window holes 110a, 120a at positions corresponding to the distance R from the center C□ of the feed wheel 3 to the pocket center, that is, on the passing line of the center of the pocket, as shown in FIG. is formed. The window holes 110a and 120a are coaxial, and the air blowing mechanism 5 and the discharge mechanism 6 are attached to these window holes 110a and 120a, respectively, and there is a thick peripheral portion between the air blowing mechanism 5 and the discharge mechanism 6. A spigot type sealing mechanism 7 for 30 is provided.

4 and 4a show details of the air blowing mechanism 5, discharge mechanism 6, and spigot type sealing mechanism 7, and FIGS.
Figure 1 shows each part in an exploded state. First, the air blowing mechanism 5 will be described. As shown in FIG. It is connected to the air supply hose 5o from the

The upper cover 5b is shown in FIGS. 4a, 8, and 9, and has a protrusion 5 that fits into the window 110a.
1 and a flange portion 52 that contacts the side extending portion 110 via a sealing member 53, and the protrusion 51 is provided with a pin hole 54 that opens on the lower surface.

Next, the discharge mechanism 6 has a machine side nozzle 6a connected to the pneumatic feed hose 6o, and the machine side nozzle 6a is attached to the flange 6.
Although the pneumatic hose 60 is not shown, it is connected to the concrete conveying system as in the prior art, and thereby the quick-setting agent is applied to the concrete being conveyed by air flow. It is supposed to be added. The lower cover 6b is shown in FIGS. 4a, 8, and 11, and has a cylindrical portion 61 that fits all the way into the window 120a.
It has a flange portion 62 that contacts the side extending portion 120 via a sealing member 63, and is fixed to the side extending portion 120 with bolts 8,8.

The protrusion 61 is provided with a pin hole 64 opening on its upper surface, and a plurality of spring insertion holes 65 are provided at equal intervals as shown in FIG. A wear-resistant sleeve 9 made of a wear-resistant material such as hardened steel or ceramic is fitted onto the inner diameter portion of the cylindrical portion 61, which is either directly hardened or, as shown, is fitted therein to form a discharge passage 90.

The spigot type seal mechanism 7 includes an upper wear-resistant pad 7a and a lower wear-resistant pad 7b. In this embodiment, the upper wear-resistant pad 7a and the lower wear-resistant pad 7b are made of one type of common member (liner), and are used upside down to seal the thick peripheral edge 3o of the feed wheel 3. It looks like this.

Specifically, the upper wear-resistant pad 7a and the lower wear-resistant pad 7b are made of cylinders with an outer diameter that fits into the windows 110a and 120a.
A curvature groove 71 having approximately the same curvature and width as the thick peripheral portion 30 is formed in the cylindrical body, and a highly wear-resistant groove 71 whose diameter matches that of the pocket 30 and the discharge side passage in the axial direction from the groove bottom. A passage hole 70 is formed. The passage hole 70 may be formed by directly hardening the pad, but in the illustrated example, the stepped hole 70 is formed from the bottom of the curvature groove 71.
A wear-resistant sleeve 9 made of a wear-resistant material such as hardened steel or ceramic (same specifications as that of the above-mentioned discharge mechanism) is inserted therethrough by press-fitting, screwing, or gluing, thereby forming a passage hole. 70 is formed.

A pin hole 74 is formed in the cylinder at the same position as the pin holes 54 and 64 of the upper and lower covers 5b and 6b, and
A spring insertion hole 75 is formed to match the spring insertion hole 65 of the lower cover 6b. In this embodiment, a spring insertion hole 55 is also formed in the cylindrical portion 51 of the upper cover 5b.

The lower wear-resistant pad 7b has a pin hole 74 and a spring insertion hole 75 facing downward, and a pin hole 64 of the lower cover 6b.
By fitting the knock pin 15 fitted into the pin hole 74, positioning and rotation prevention are achieved, and the lower cover 6b
The spring 16 inserted in advance into the spring insertion hole 65 of
is inserted into the spring insertion hole 75, thereby forcing the lower wear-resistant pad 7b upward. As a result, the inner diameter side and the outer diameter side of the thick peripheral portion 30 of the feed wheel 3 form the curvature groove 7.
1, and the wear-resistant sleeve 9 is set so as to face the lower surface of the thick inner circumferential edge 30 with almost zero clearance.

On the other hand, the upper wear-resistant pad 7a has the dowel pin 15 fitted into the pin hole 74, and with the pin hole 74 and the spring insertion hole 75 facing upward, the upper wear-resistant pad 7a is moved by its own gravity to the window 110.
a, and by aligning the knock pin 15 with the pin hole S4 of the upper cover 5b, positioning and rotation prevention are achieved. As a result, the thick peripheral portion 3 of the feed wheel 3
The inner diameter side and the outer diameter side of the wear sleeve 9 are fitted into the curvature groove 71, and the wear sleeve 9 is set so as to face the upper surface of the thick peripheral portion 30 with almost zero clearance. In addition, when the sealing load of the upper wear-resistant pad 7a is insufficient, the spring 16 is also inserted into the spring insertion hole 55.75 as shown in FIG. 4a.
As a result, the upper wear-resistant pad 7a is urged downward, so that even if the wear-resistant sleeve 9 is worn, it can be more precisely adjusted and maintain the balance.

The upper cover 5b is fixed and unfixed to the side extending portion 110 with a single touch by a rotatable pressing mechanism 17. To explain in detail, the rotatable pressing mechanism 17
As shown in FIGS. 3 and 4a, a butterfly bolt 17a is rotatably supported by a pin 170 on a bracket 140 fixed to the end plate 14, and a butterfly bolt 17a has a base end provided at the bottom of the main body of the sealed tank 1. A rotatable lever 17b consisting of two parallel bars is pivotally supported on the bracket 106 by a pin 171.

The parallel bar constituting the rotatable lever 17b has a pressing protrusion 173 on its lower surface that can come into contact with the upper surface of the upper cover 5b,
The free ends are connected by a connecting bar 17c, and a groove or hole 172 into which the butterfly bolt 17a fits is formed in the center of the connecting bar 17c, and a cap nut is attached to the tip of the butterfly bolt protruding from the groove or hole 172. By screwing together the lever 17d, the rotatable lever 17b is fixed in position.

Further, as shown in FIGS. 1 and 3, the main body 1a of the sealed tank 1 is provided with at least one opening 18 for cleaning, and the opening 18 is normally hermetically sealed with an opening/closing lid 19. The opening/closing lid 19 is opened only in an emergency, and the quick setting agent in the tank can be taken out from the opening 18. FIG. 7 shows details of the opening 18 and the opening/closing lid 19. The opening 18 is surrounded by a cylindrical wall 180, and is brought into close contact with the opening/closing lid 19 by an O-ring 181 attached to the end surface of the cylindrical wall. The opening/closing lid 19 may be of any type as long as it has a structure that opens on one side, and in the embodiment, a butterfly bolt 19a is attached to a bracket provided on the main body 1a.

19b is pivotally supported by a pin, the wing bolts 19a and 19b are inserted into the opening/closing lid 19, and the cap nut 19c is installed and removed so that it can be opened outward using one wing bolt 19a as a fulcrum. .

Note that when the window holes 110a and 120a have a non-circular cross section, the dowel pin and pin hole are not necessarily required. The opening/closing lid 19 is preferably made of high-strength transparent plastic. In this way, the properties of the quick-setting agent in the tank can be easily determined.

[Effect of the embodiment]

The apparatus of the present invention is installed on the base floor of a site for concrete spraying using a base 201, or is used by being mounted on a concrete spraying vehicle or the like.

The quick-setting agent A is accommodated inside the airtight tank 1 through the input port 100. The feed wheel 3 is rotated at a required rotational speed by driving the opening mechanism 20, and at the same time, compressed air is sent from the compressed air supply source through the air supply hose 50.

In this way, the quick setting agent A deposited on the feed wheel 3 through the lower opening 102 of the airtight tank 1 is metered by being filled into the pocket 31 of the feed wheel 3, and as the feed wheel 3 rotates. and move. Since the feedwheel 3 is eccentric with respect to the tank center C2, the pocket 31 gradually comes out of the lower opening area of the airtight tank 1, passes between the feed wheel case lateral extensions 110 and 120 outside the airtight tank, and reaches this position. It is cut out and blown by the air blowing mechanism 5 and discharge mechanism 6 of the cutting mechanism 4 provided in the.

That is, the pocket 31 is the side extending portion 11o.

When the axes of the air nozzle 5a attached to the upper cover 5b and the machine side nozzle 6a attached to the lower cover 6b are aligned at predetermined positions of 120, the upper wear-resistant pad 7
Compressed air is blown through the passage hole 7o of a, and the metered quick-setting agent in the pocket 31 is blown from the passage hole 70 of the lower wear-resistant pad 7b through the discharge passage 90 to the machine side nozzle 6a, and from the pneumatic hose 60. It is conveyed by air current to the concrete conveyance path and mixed into concrete via an addition mechanism.

At this time, the thick peripheral portion 30 including the pocket 31 has the curvature grooves 71.7 of the upper wear-resistant pad 7a and the lower wear-resistant pad 7b.
1, the lower wear-resistant pad 7b is pressed upward by the spring 16 to maintain zero clearance with the upper surface of the thick-walled peripheral portion 30, and the upper wear-resistant pad 7a, which has a great influence on measurement accuracy, Alternatively, since a downward force is further applied by the spring force, the clearance with the lower surface of the thick peripheral portion 30 is maintained at zero. Therefore, good sealing performance is ensured in the cutting zone due to the labyrinth effect. Furthermore, the cutting mechanism 4 including the upper wear-resistant pad 7a and the lower wear-resistant pad 7b is located outside the tank, and there is almost no quick-setting agent A around it. As a result, even if the internal pressure of the tank is high, the rapid setting agent is completely prevented from entering the pocket 31 from the sides of the cutting area.

Rapid setting agents can be pneumatically fed with good metering accuracy.

Even if the lower wear-resistant pad 7b wears out due to continued use, the clearance is automatically adjusted because it is urged by the spring 16 toward the lower surface of the thick-walled peripheral edge of the feed wheel. Further, since the upper wear-resistant pad 7a is also in a state of moving toward the upper surface of the thick peripheral portion of the feed wheel by its own weight or by the force of a spring, the clearance can be automatically adjusted. Therefore, good cutting accuracy can be maintained over a long period of time without requiring complicated adjustment operations. Also, when checking the clearance, there is no need to use sick gauges, and the end plate 14
When it is removed, the end side of the feed wheel case 1b is opened, and since there is a sealing mechanism in that area, it is possible to immediately judge whether the clearance is good or bad.

As mentioned earlier, quick-setting agents tend to react with the drain and moisture contained in the compressed air, and even if the air line is well-controlled by removing drain, etc., it may stick to the passageway in the cutting device, or May cause passageway obstruction. In this case, in the past, it was necessary to remove the remaining quick-setting agent (high alkali) from the tank and disassemble the tank, but with this invention, these tasks are not required and the process can be completed in an extremely short time. Easy and safe cleaning.

That is, in the present invention, the cutting device 4 is installed outside the tank (laterally extending portions 110 and 120 of the feed wheel case 1b).
). Moreover, in order to disassemble the cutting device 4, it is sufficient to remove the cap nut 17d from the state shown in FIG. 4a and lift the rotatable lever 17b. If you do this,
The rotatable lever 17b tilts around the pin 171 as shown in an imaginary line, thereby releasing the fixation of the upper cover 5b by the pressing protrusion 173. All that is left to do is to pull out the upper cover 55 from the window hole 110a, and since the entire air blowing mechanism is removed, cleaning can be performed by inserting a cleaning jig or injecting fluid etc. through the window hole 110a.

In addition, when it is necessary to take out the upper wear-resistant pad 7a, remove the upper cover 5b and pull it upward, and when you want to remove the lower wear-resistant pad 7b, just insert your hand under the lower plate 120 and loosen the bolt. . These can be done without removing the feedwheel 3, so they are very simple.

In addition, even if the blockage is large-scale and the remaining amount of quick-setting agent in the sealed tank 1 must be removed, the main body 1a has an opening 18 at least in the body part and can be opened and closed with the opening/closing lid 19. It has become. Therefore, by using the opening 18 as a hand hole and attaching a removable chute or the like to the opening 18, the remaining amount in the tank can be easily removed.

In addition, as in the example, the device was installed with a load cell of 200°200°.
When supported via a weight signal, the amount remaining in the tank and the discharge amount per pocket can be accurately confirmed and grasped.

〔Effect of the invention〕

According to the first and second aspects of the present invention described above, the wheel casing 1b having the lateral extensions 110 and 120 is provided at the bottom of the tank, and the pocket group at the peripheral edge is provided in the wheel casing 1b on the side. A feed wheel 3 eccentric to the tank center axis is arranged so as to pass through the lateral extension, and an air blowing mechanism 5 and a discharge mechanism 6 are installed in the pocket group passage position in the thickness direction of the lateral extension. And, between the air blowing mechanism 5 and the discharge mechanism 6, a spigot type sealing mechanism 7 for the peripheral edge 30 of the feed wheel is provided.
There is no intrusion of quick-setting agent from unnecessary places, good weighing accuracy can be maintained over a long period of time without the need for complicated clearance adjustments, and expensive quick-setting agents can be used most efficiently. Excellent results can be obtained.

Further, according to the third aspect of the present invention, the upper cover 5b to which the air blowing mechanism 5 is attached is disposed on the upper wear-resistant pad 7a, and the upper cover 5b is laterally extended by the rotatable pressing mechanism 17. Since it is fixed to the portion 110, an excellent effect can be obtained in that it can be easily cleaned in a short time when it is closed or the like.

Furthermore, according to item 6 of the present invention, the opening 18 for cleaning is formed in the body of the sealed tank 1, and the opening/closing lid 19 is airtightly attached to the opening 18, so that when cleaning the cutting mechanism alone is not sufficient, Also, an excellent effect can be obtained in that the remaining quick-setting agent in the tank can be easily removed.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the quick-setting agent cutting and air blowing device according to the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a partially front view thereof, and FIG. 4 4a is a sectional view showing the main part of the present invention, FIG. 4a is an enlarged view thereof, and FIG.
The figures are a sectional view taken along the line ■-■ in Figure 4, Figure 6 is a partially cutaway plan view of the wheel case, Figure 7 is an enlarged sectional view of the cleaning opening in Figure 1, and Figure 8 is a spigot type seal. An exploded cross-sectional view of the mechanism, Figure 9 is a plan view of the upper cover of the pilot seal mechanism, Figure 10 is a plan view of the wear-resistant pad of the pilot seal mechanism, and Figure 11 is a plan view of the lower cover of the pilot seal mechanism. It is a diagram.

Claims (6)

[Claims] (1) An airtight tank that accommodates quick-setting agents, a feed wheel that has a group of pockets around its periphery for measuring the quick-setting agents in the tank, and a mechanism that discharges the measured quick-setting agents in the pockets using compressed air. A wheel casing having a lateral extension is provided at the bottom of the tank, and a group of pockets at the peripheral edge of the wheel casing are aligned with the tank center axis so as to pass through the lateral extension. An eccentric feed wheel is arranged, and an air blowing mechanism and a discharge mechanism are installed in the pocket group passage position in the thickness direction of the lateral extension part, and an air blowing mechanism and a discharge mechanism are installed between the air blowing mechanism and the discharge mechanism. A pneumatic feeding device for cutting out quick-setting agents, characterized in that a spigot-type sealing mechanism is provided for the peripheral edge of a feed wheel. (2) The feed wheel is equipped with a flange on the outer periphery of the thick-walled periphery that forms the pocket group, and the spigot type seal mechanism
Claim 1 comprising upper and lower wear pads having passage holes that match the pockets of the feedwheel and curvature grooves corresponding to the thick walled periphery, at least the lower wear pads being adapted to be pushed up on a bias. A device for cutting out and pneumatically blowing the quick-setting agents described in Section 1. (3) A patent that includes an upper cover with an air blowing mechanism attached above the upper wear-resistant pad, and the upper cover is fixed to the side extension by a rotatable pressing mechanism. An apparatus for cutting out and pneumatically feeding quick-setting agents according to any one of claims 1 and 2. (4) The rotatable pressing mechanism has a butterfly bolt provided on the end plate that closes the end plate of the side extension, the base end is pivoted to the sealed tank, the free end side engages with the butterfly bolt, and the lower surface 4. The device for cutting out and pneumatically discharging quick-setting agents according to claim 3, further comprising a rotatable lever provided with a pressing protrusion. (5) Claims 1 and 2 in which the upper wear-resistant pad and the lower wear-resistant pad have wear-resistant surfaces integrally or integrally.
A device for cutting out and pneumatically blowing the quick-setting agent according to any one of paragraphs. (6) The airtight tank according to any one of claims 1 to 5, wherein a cleaning opening is formed in the body of the sealed tank, and an opening/closing lid is airtightly attached to the opening. A pneumatic device for cutting out binders.