JP2018080601A - Rotation pump for transporting viscosity material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of scratching scar caused by an excessive press contact wearing by a rotating elliptical-shaped piston against an inner peripheral wall surface of a cylinder or prevent damage of the piston and to enable even a viscous material of high viscosity to be discharged under uniform density having no clearance at all.SOLUTION: This invention comprises a cylinder 1 having a viscosity material transferring space part S formed as a cavity having a circular cross section and formed with a viscosity material intake port 2 at one side and a viscosity material outlet port 3 at the other side so as to be communicated with the viscosity material transferring space part S; and an elliptical-shaped piston 11 in which a close contact elastic member 12 encloses and covers the cylinder 1 at its outer peripheral surface and elliptical-shaped piston is rotationally driven by a driving source M while a side surface in an elliptical longitudinal axis direction being slid and contacted with an inner peripheral wall surface of the cylinder 1. There is provided a liquid storage part 13 filled with hermetic seal lubrication liquid between the close contact elastic member 12 of the piston 11 and the inner peripheral wall surface of the cylinder 1 so as to support the close contact elastic member 12 from inside part of the piston 11 and to keep a contacted state between the inside surface of the cylinder 1 and the close contact elastic member 12.SELECTED DRAWING: Figure 1

Description

  The present invention includes, for example, suction on one end side by negative pressure and discharge on the other end side by positive pressure, such as cement mortar for concrete, sewage sludge, chemical industry waste liquid, sludge, food, etc. It is related with the rotary pump for viscous material transfer using the sealing lubricating liquid which can be transferred by repetition of this, and can be comprised small and lightweight.

  In general, a vane pump is widely used as one of pumps for transferring various viscous materials. This vane type pump is transported by causing pulsation in discharge by giving repetitive acceleration to a viscous material. However, when the transferred viscous material is cement mortar for concrete, it contains stones, gravel, etc., so the vane's protruding movement is hindered and the vane pump stops or breaks. There is a fear. For this reason, in recent years, many mechanisms have been proposed that do not hinder the vane protruding movement.

  For example, as disclosed in Patent Document 1, the rotor is eccentrically housed in a pump chamber formed in the casing, and extends in the radial direction around the rotation axis of the rotor and extends in the radial direction and the rotation axis direction. The vane is slidable in the radial direction in a plurality of vane grooves that open in the direction, and the tip of the vane is in sliding contact with the inner peripheral wall surface of the pump chamber by the rotational centrifugal force of the rotor. Provided with a plurality of working chambers that are surrounded by the rotor and vanes and whose volume is changed by the rotational drive of the rotor, and a suction path through which viscous material flows into the working chamber in the volume expansion process, and in the volume reduction process A vane pump having a discharge passage for discharging viscous material from a working chamber has been proposed.

  Further, as disclosed in Patent Document 2, vanes are accommodated in the vane liquid accommodating portion formed radially from the central portion of the cylindrical main body so as to protrude from the peripheral surface of the cylindrical main body, and the cylindrical main body is And is accommodated in a casing having an inflow pipe on one side and a discharge pipe on the other side through a circular path-like transportation path provided on the lower side inside, and the vane is pushed out by water pressure to the inner peripheral wall surface of the casing. By being in pressure contact, a pair of front and rear vanes make the inner lower transportation path partitioned into an arc cavity, and the viscous material flowing in from the inflow pipe is surrounded and transported by the pair of front and rear vanes on the rotating body. A vane pump that is pumped from the road to the discharge pipe side has been proposed.

JP 2011-47322 A Japanese Utility Model Publication No. 56-10954

  However, in the case of Patent Document 1 and Patent Document 2 described above, the tip of the rotating vane slides in such a way that the tip of the rotating vane is pressed against the inner peripheral wall surface of the casing by centrifugal force, water pressure, etc. Because it is a so-called squeeze-out pressure feed type vane pump, not only the inner peripheral wall surface of the casing is scratched by the tip of the vane, but also the excessive load caused by centrifugal force, water pressure, etc. on the inner peripheral wall surface of the casing. There is a possibility that the pressure contact tip may be damaged.

  Further, when the viscous material is pumped out by the rotation of the vane in the conventional vane type pump, it is between the pump chamber and the rotor as described in Patent Document 1 or the casing and the circle as described in Patent Document 2 described above. High viscosity viscous material such as cement mortar has a uniform density because the viscous material between the columnar body is pulsating by applying repetitive acceleration to the viscous material with gaps. There is a risk that unevenness of density (specific gravity) may be generated inside the concrete after being deposited and solidified in a predetermined place without being discharged in the form of dumpling.

  Therefore, the present invention was created in view of the conventional circumstances as described above. The purpose of the present invention is to provide a side surface in the elliptical long axis direction on the inner peripheral wall surface of the cylinder formed as a cavity having a circular cross section. It is equipped with an elliptical piston that is slidably driven by a drive source while being in sliding contact, and prevents the occurrence of scratches and damage to the piston due to excessive pressure friction on the inner peripheral wall of the cylinder by the rotating piston. An object of the present invention is to provide a viscous material transfer rotary pump using a sealed lubricating liquid that can be discharged evenly evenly at a uniform density without gaps and can be made compact and lightweight.

In order to solve the above-described problems, in the present invention, a description will be given by adding reference numerals in the embodiments for carrying out the invention to be described later. And a cylinder 1 having a viscous material suction port 2 on one side and a viscous material discharge port 3 on the other side so as to communicate with the viscous material transfer space S, and an inner peripheral wall surface of the cylinder 1 on an outer peripheral surface And an elliptical piston 11 that is rotationally driven by a driving source M while being covered with an intimate elastic member 12 that is in close contact with the inner circumferential wall surface of the cylinder 1 and sliding in contact with the side surface in the elliptical long axis direction. Is supported from the inside of the piston 11 so that the inner surface of the cylinder 1 and the intimate elastic member 12 are kept in contact with each other. I have 13 It is characterized in.
The piston 11 is formed such that the liquid storage portion 13 is recessed on both side surfaces of the piston 11, and each liquid storage portion 13 is communicated by a lubricating liquid communication hole 14 penetrating the side surface of the piston 11 itself. Can be.
The piston 11 is placed in pressure contact with the adjustment bolt 15 screwed in the lubricating fluid communication hole 14 along the elliptical long axis direction, and one end of the adjustment bolt 15 so as to be in close contact with the elastic member 12. It is possible to adjust the pressing force of the tight elastic member 12 against the inner peripheral wall surface of the cylinder 1 by changing the pressing force of the pressing adjusting unit 16 by adjusting the screwing or pulling-in of the adjusting bolt 15. It can be made.
The inner peripheral wall surface located below the viscous material suction port 2 and the viscous material discharge port 3 in the viscous material transfer space S of the cylinder 1 is opened, and a pair of movable sealing valves 17 on the suction side and the discharge side, 18 are arranged opposite to each other, and both movable sealing valves 17 and 18 are elastically pressed against each other in the closing and swinging direction so as to close the viscous material transfer space S by cross-contacting the outer periphery of the piston 11 in close contact with each other from both sides. It can be energized.
One side of the cylinder 1 is provided with a liquid injection part 20 filled with a sealing lubricant in the liquid storage part 13 and sealed with a sealing lid 20A, and on the other side of the cylinder 1, a liquid injection part is provided. It is possible to provide an air vent 19 that allows the air in the liquid storage portion 13 to be removed with the sealing lubricating liquid from 20 and sealed with the sealing member 19A.

In the rotary pump for viscous material transfer using the sealed lubricating liquid according to the present invention configured as described above, the elliptical type is driven to rotate while the side surface in the elliptical long axis direction is in sliding contact with the inner peripheral wall surface of the cylinder 1. The piston 11 rotates between the viscous material suction port 2 side and the viscous material discharge port 3 side so that the side surface in the elliptical short axis direction and the inner peripheral wall surface of the viscous material transfer space S on the viscous material suction port 2 side are formed. A space between the side surface in the elliptical short axis direction and the inner peripheral wall surface of the viscous material transfer space S on the viscous material discharge port 3 side serves as a positive pressure space and a close elastic member 12 and the cylinder 1 The viscous material P is pushed out to the viscous material discharge port 3 side so that no gap is generated between the inner peripheral wall surface and the inner surface.
The liquid storage portion 13 filled with a sealing lubricant between the piston 11 and the cylinder 1 and the substantially planar side wall supports the close elastic member 12 from the inside of the piston 11 to maintain contact with the cylinder 1, and is a viscous material. Even if the transfer space S becomes a positive pressure or a negative pressure due to the transfer of the viscous material, the close elastic member 12 is prevented from swinging in the inner and outer directions.
The adjustment bolt 15 is screwed and pushed out from the lubricating fluid circulation hole 14 side so as to move to the outside of the piston 11 itself along the elliptical long axis direction of the piston 11, so that the pressing force to the pressing adjustment portion 16 is increased. Accordingly, the pressure contact force of the close elastic member 12 against the inner peripheral wall surface of the cylinder 1 is increased. On the other hand, the adjustment bolt 15 is screwed and pulled into the lubricating fluid circulation hole 14 side so as to move to the inside of the piston 11 along the elliptical long axis direction. 1, the pressure contact force of the close elastic member 12 to 1 is decreased.
Thus, by adjusting the close contact state between the outer peripheral side surface of the close elastic member 12 and the inner peripheral wall surface of the cylinder 1, the pressures in the negative pressure space S1 on the suction side and the positive pressure space S2 on the discharge side in the cylinder 1 are appropriately set. In addition, the brake phenomenon of the piston 11 due to the excessive pressure friction of the close elastic member 12 against the inner peripheral wall surface of the cylinder 1 is avoided.
A pair of movable sealing valves on the suction side and the discharge side that are elastically urged in the closing and swinging directions so as to close the viscous material transfer space S by close pressure contact with the outer peripheral surface of the piston 11 from both sides. 17 and 18 always block the inner peripheral wall surface located below the viscous material suction port 2 and the viscous material discharge port 3 of the viscous material transfer space S of the cylinder 1 during the rotation of the piston 11.
Thereby, the suction side movable sealing valve 18 dams the viscous material P so as not to move downward from the position of the viscous material suction port 2, so that the viscous material from the viscous material suction port 2 to the inside of the cylinder 1 is retained. Improve the suction force by the negative pressure of P.
On the other hand, the discharge-side movable sealing valve 17 dams the viscous material P so as not to move downward from the position of the viscous material discharge port 3 so that the viscous material is discharged from the viscous material discharge port 3 to the outside of the cylinder 1. Improve P positive pressure discharge force.
The air vent 19 on the other side of the cylinder 1 vents the air in the liquid container 13 to the outside as the sealed lubricating liquid is filled into the liquid container 13 from the liquid injection part 20 on one side of the cylinder 1. By making it come out, air accumulation in the liquid storage unit 13 is prevented.

  Since the present invention is configured as described above, it is rotationally driven by the drive source M while the side surface in the elliptical long axis direction is in sliding contact with the inner peripheral wall surface of the cylinder 1 formed as a hollow having a circular cross section. Oval-shaped piston 11 prevents scratches due to excessive pressure contact friction on the inner peripheral wall surface of cylinder 1 and damage to piston 11, and discharges even viscous material P at a uniform density without gaps. Can be made.

  That is, this is because the present invention has a viscous material transfer space S formed as a cavity having a circular cross section and communicates with the viscous material transfer space S on one side on the viscous material inlet 2 and on the other side. The cylinder 1 formed with the viscous material discharge port 3 and the tightly elastic member 12 that is in close contact with the inner peripheral wall surface of the cylinder 1 are covered with the outer peripheral surface, and the side surface in the elliptical long axis direction slides on the inner peripheral wall surface of the cylinder 1. And an elliptical piston 11 that is rotationally driven by a drive source M while in contact with the piston 11 so as to support the close elastic member 12 from the inside of the piston 11 and maintain contact between the inner peripheral wall surface of the cylinder 1 and the close elastic member 12. This is because the liquid containing portion 13 filled with the sealing lubricant is provided between the substantially planar side walls of the cylinder 11 and the cylinder 1.

  That is, the rotation from the viscous material suction port 2 side to the viscous material discharge port 3 side causes a negative gap between the side surface in the elliptical short axis direction and the inner peripheral wall surface of the viscous material transfer space S on the viscous material suction port 2 side. At the same time as the pressure space, the space between the side surface in the direction of the minor axis of the ellipse and the inner peripheral wall surface of the viscous material transfer space S on the viscous material discharge port 3 side becomes a positive pressure space to closely contact the elastic member 12 and the inner periphery of the cylinder 1. By extruding the viscous material P toward the viscous material discharge port 3 so as not to generate a gap between the wall and the wall surface, a gap is generated even for the highly viscous material P sucked from the viscous material suction port 2. In addition, it is possible to discharge from the viscous material discharge port 3 at a substantially constant density.

  In addition, the liquid storage portion 13 filled and sealed with a sealing lubricant between the substantially planar side walls of the piston 11 and the cylinder 1 supports the close elastic member 12 from the inside of the piston 11 and the inner peripheral wall surface of the cylinder 1. By maintaining the contact, the occurrence of the brake phenomenon, which is a negative property of the close elastic member 12, can be eliminated, and the occurrence of scratches on the inner peripheral wall surface of the cylinder 1 and the damage of the piston 11 can be prevented. In addition, even if the viscous material transfer space S becomes a positive pressure and a negative pressure for the transfer of the viscous material, it is possible to prevent the tight elastic member 12 from swinging inward and outward.

  The piston 11 is formed by forming the liquid storage portion 13 in a concave shape on both side surfaces of the piston 11 itself, and each liquid storage portion 13 is communicated by a lubricating liquid communication hole 14 penetrating the side surface. Pressure is applied to the both sides of the close elastic member 12 in the width direction substantially uniformly from the inside of the liquid storage portion 13 of the piston 11, whereby the contact between the cylinder 1 and the close elastic member 12 can be maintained.

  The piston 11 is placed in pressure contact with the adjustment bolt 15 screwed in the lubricating fluid communication hole 14 along the elliptical long axis direction, and one end of the adjustment bolt 15 so as to be in close contact with the elastic member 12. A pressure adjusting portion 16, and adjusting the pressure of the pressure adjusting portion 16 against the close elastic member 12 by adjusting the screwing or screwing-in of the adjusting bolt 15, thereby pressing the close elastic member 12 against the inner peripheral wall surface of the cylinder 1. The force can be adjusted. Therefore, the viscous material P can be sucked in the negative pressure space S1 and discharged in the positive pressure space S2 by an appropriate close contact state between the inner peripheral wall surface of the cylinder 1 and the outer peripheral side surface of the close elastic member 12, and driven. Wear due to excessive pressure contact with the inner peripheral wall surface of the cylinder 1 by the piston 11 that is rotationally driven by the source M and increase in power of the drive source M due to an increase in load due to an increase in friction can be reliably prevented. .

  That is, the adjustment bolt 15 is screwed from the inside of the piston 11 in the lubricating fluid communication hole 14 and the pressure adjusting portion 16 is pushed toward the outside of the piston 11, thereby increasing the pressure contact force of the tightly elastic member 12 to the cylinder 1. be able to. On the other hand, the adjustment bolt 15 is screwed into the lubricating fluid communication hole 14 and is retracted toward the inside of the piston 11, thereby reducing the pressing force applied to the pressing adjustment portion 16 by the adjustment bolt 15, and tight elasticity to the cylinder 1. The pressure contact force of the member 12 can be reduced. Thus, the adjustment of the pressing force of the close elastic member 12 to the cylinder 1 can be easily and reliably performed by the adjusting bolt 15.

  The inner peripheral wall surface located below the viscous material suction port 2 and the viscous material discharge port 3 in the viscous material transfer space S of the cylinder 1 is opened, and a pair of movable sealing valves 17 on the suction side and the discharge side, 18 are arranged opposite to each other, and both movable sealing valves 17 and 18 are elastically pressed against each other in the closing and swinging direction so as to close the viscous material transfer space S by cross-contacting the outer periphery of the piston 11 in close contact with each other from both sides. Since it is energized, during the rotation of the piston 11, the inner peripheral wall surface positioned below the viscous material suction port 2 and the viscous material discharge port 3 of the viscous material transfer space S of the cylinder 1 and the outer periphery of the piston 11. It is possible to always close the gap between the surface and the side surface in the elliptical minor axis direction and the viscous material when rotating from the viscous material suction port 2 side toward the viscous material discharge port 3 side. Occurred between the inner peripheral wall surface of the viscous material transfer space S on the suction port 2 side A negative pressure, and, respectively are pressure itself positively generated between the inner peripheral wall surface of the viscous product pump space S in elliptic minor axis direction of the side surface and the viscous material delivery port 3 side can be reliably thing that.

  One side of the cylinder 1 is provided with a liquid injection part 20 filled with a sealing lubricant in the liquid storage part 13 and sealed with a sealing lid 20A, and on the other side of the cylinder 1, a liquid injection part is provided. 20 is provided with an air vent 19 that allows the air in the liquid container 13 to be removed and sealed with the sealing member 19A as the sealed lubricating liquid from 20 is filled. As the housing portion 13 is filled with the sealed lubricating liquid, the air in the liquid housing portion 13 can be extracted from the air vent portion 19 to the outside. Thereby, the accumulation of air in the sealed lubricating liquid in the liquid storage portion 13 can be prevented, and the pressing action of the sealed lubricating liquid against the tight elastic member 12 is ensured.

  In addition, the code | symbol attached | subjected in each means of the means for solving said subject and the effect of invention was attached | subjected in order to make easy reference with the part which shows each structure part described in drawing. The present invention is not limited to these descriptions, structures, shapes, and the like indicated by reference numerals and the like in the drawings.

It is the front view which showed the use condition in one form for carrying out the present invention transparently. It is XX sectional drawing of FIG. It is YY sectional drawing of FIG. It is an exploded perspective view similarly. Explaining the operation principle in the use state, (a) is a front view at the suction start point, (b) is a front view showing a suction state by negative pressure, (c) is a front view at the discharge start point by positive pressure, (D) is a front view which shows the discharge state by a positive pressure. It is the side view which showed the use condition mounted in the two-wheeled carriage with a partial cross section.

  Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings. Reference numeral 1 shown in the figure is a cylinder constituting a viscous material transfer rotary pump using a sealed lubricating liquid according to the present invention. As shown in FIGS. 1 to 4, the viscous material inlet 2 has a viscous material transfer space S formed as a cavity having a circular cross section and communicates with the viscous material transfer space S on one side. Further, a viscous material discharge port 3 is formed on the other side, and an elliptical piston 11 is built in the viscous material transfer space S of the cylinder 1, and the side surface in the elliptical long axis direction of the piston 11 is the inner side of the cylinder 1. It is rotationally driven by a drive source M (see FIG. 6) such as a rotational drive motor provided with a speed reduction mechanism MG while being in sliding contact with the peripheral wall surface.

  The cylinder 1 has a cylindrical body portion 4 in which a piston 11 is disposed, and a drive bearing portion 5A that protrudes in a cylindrical shape substantially at the center, and closes one open end of the body portion 4. 5. Each of the front sealing side plates 7 that closes the other opening end of the body 4 via a middle frame 6 having a circular opening 6A in the center and an O-ring-shaped packing member 7A, for example, bolts and nuts These fastening members (not shown) are assembled. The body portion 4 is formed with a pair of guide rail portions 8A, 8B having a substantially trapezoidal cross section on the inner peripheral wall surface along the circumferential direction, and is lower than the viscous material suction port 2 and the viscous material discharge port 3. The inner peripheral wall surface located at is opened to form a substantially C-ring-shaped housing in front view. A pair of movable sealing valves 17 and 18 on the suction side and the discharge side, which will be described later, are arranged opposite to each other in the open portion.

  The elliptical piston 11 is fixedly covered with the elastic member 12 in close contact with the outer peripheral surface of a piston body made of, for example, a casting without being displaced along the rotation direction of the piston 11 around the piston body. On the outer peripheral surface of the close contact elastic member 12, a pair of guide groove portions 9A and 9B having a substantially trapezoidal cross section are formed along the circumferential direction so as to be in sliding contact with the guide rail portions 8A and 8B of the body portion 4 of the cylinder 1. Further, the thickness in the width direction of the piston 11 is smaller than the thickness in the width direction of the body portion 4, and the end portions in the width direction of the intimate elastic member 12 are substantially wedge-shaped in cross section and protrude outward. The tip is slidably in close contact with the inner surface of each of the rear sealing side plate 5 and the front sealing side plate 7.

  In the center of the piston main body of the piston 11, the front end side of the output drive shaft L in which the driving force by the driving source M passed through the driving bearing portion 5A of the rear sealing side plate 5 is appropriately reduced by the reduction mechanism MG is fitted. A shaft hole 11A for mating is formed. A key protrusion 21A is formed in the inner surface of the shaft hole 11A along the hole direction, and a key groove 21B is recessed along the axial direction of the output drive shaft L corresponding to the key protrusion 21A. By engaging with the groove 21B, the output drive shaft L and the piston 11 rotate integrally.

  Recessed liquid storage portions 13 are formed on both side surfaces of the piston 11, and the inner peripheral surfaces of the guide rail portions 8 </ b> A and 8 </ b> B of the body portion 4 in the cylinder 1 by supporting the close elastic member 12 from the inside of the piston 11, The liquid container 13 is filled with a sealing lubricant so as to maintain contact with the inner surfaces of the rear sealing side plate 5 and the front sealing side plate 7. As the sealing lubricant, for example, when the viscous material P is a relatively low-viscosity food, fresh water is used, and when the viscous material P is a relatively high-viscosity mortar, a 20-fold waterproofing liquid is used. Each of the liquid storage portions 13 on both side surfaces has a pair of lubricating liquid communication holes 14 having a substantially rectangular opening in a side view and penetrating in a symmetrical position in the piston body itself along the elliptical long axis direction around the central shaft hole 11A. It is communicated by.

  Further, an adjustment bolt 15 is screwed into both the lubricating liquid communication holes 14 toward the outside of the piston 11 along the elliptical long axis direction of the piston 11, and the cylinder 1 is adjusted by screwing or adjusting the screwing of the adjustment bolt 15. The pressure contact force of the tightly elastic member 12 with respect to can be adjusted. That is, the adjustment bolt 15 is screwed so as to be pushed toward the outside of the piston 11 in the lubricating fluid communication hole 14 along the elliptical long axis direction of the piston 11, thereby increasing the pressing force of the pressing adjustment portion 16. Accordingly, the pressure contact force of the close elastic member 12 to the cylinder 1 is increased. On the other hand, the adjustment bolt 15 is retracted so as to be drawn into the inside of the piston 11 along the elliptical long axis direction in the lubricating fluid communication hole 14, whereby the pressing force of the pressing adjustment portion 16 is reduced with respect to the cylinder 1. The pressing force of the close elastic member 12 is also reduced. As a result, it is possible to adjust the pressing force of the tightly elastic member 12 covered with the cylinder 1 against the inner peripheral wall surface of the cylinder 1, thereby eliminating excessive wear and load.

  A pair of movable sealing valves 17 and 18 on the suction side and the discharge side disposed opposite to each other at the open portion of the inner peripheral wall surface located below the viscous material suction port 2 and the viscous material discharge port 3 of the body portion 4, The support shafts 23A and 23B provided so as to straddle the rear sealing side plate 5 and the front sealing side plate 7 are swingable. Then, the spiral springs 22A wound around the support shafts 23A and 23B so as to close the viscous material transfer space S by cross-contacting in close contact with the piston 11 covering the elastic member 12 closely on the outer peripheral surface from both sides. 22B (refer to FIG. 2) are elastically biased toward each other in the closed swinging direction, that is, inward of the body 4.

  Here, the tip shapes of the pair of movable sealing valves 17 and 18 that are in close pressure contact with the piston 11 are a pair of guide grooves 9 </ b> A having a substantially trapezoidal concave cross section of the close elastic member 12 covered by the piston 11. , 9B, a pair of cross-sectionally substantially trapezoidal convex shapes are formed. Further, the movable sealing valves 17 and 18 are in close contact with the outer peripheral surface of the close elastic member 12, and the outer peripheral surface of the close elastic member 12 slides with the rotation of the piston 11 to maintain the close contact. Thus, for example, the contact surfaces of the movable sealing valves 17 and 18 with the close elastic member 12 are covered with an elastic material. As a result, during the rotation of the piston 11, the space between the inner peripheral wall surface located below the viscous material suction port 2 and the viscous material discharge port 3 of the viscous material transfer space S of the cylinder 1 and the outer peripheral surface of the piston 11. The gap is always closed.

  The front sealing side plate 7 of the cylinder 1 is provided with an L-shaped liquid injection part 20 that communicates with the liquid storage part 13, and the liquid storage part 13 is filled with a sealing lubricating liquid, for example, by a screw-type sealing lid 20A. It is supposed to be sealed. Further, the rear sealing side plate 5 of the cylinder 1 is provided with an air vent 19 that communicates with the liquid container 13, and the air in the liquid container 13 is vented as the sealed lubricating liquid is filled from the liquid injector 20. The sealing member 19A is hermetically sealed.

  Next, the operating principle of the configuration configured as described above will be described with reference to FIG. 5. First, as shown in FIG. 5A, when the suction starts, the elliptical long axis direction of the piston 11 is changed. Horizontally, one end of the long axis A is positioned at the upper edge of the viscous material suction port 2 in the viscous material transfer space S, and the other end B of the long axis is at the upper edge of the viscous material discharge port 3 in the viscous material transfer space S. positioned.

  As shown in FIG. 5B, the piston 11 rotates, for example, 135 ° in the clockwise direction from the viscous material suction port 2 side toward the viscous material discharge port 3 side (A in the elliptical long axis direction of the piston 11). When the point is located obliquely to the upper right), in the viscous material transfer space S, the intermediate portion of one side surface in the elliptical short axis direction of the piston 11 (intermediate of the elliptical side surface AB) faces the viscous material suction port 2 of the cylinder 1. It becomes the rotation position to do. Then, the cylinder 1 is surrounded by the inner peripheral wall surface of the cylinder 1 on the viscous material suction port 2 side, the side surface in the elliptical short axis direction facing the viscous material suction port 2 of the piston 11, the rear sealing side plate 5, and the front sealing side plate 7. The substantially arc-shaped space is in a negative pressure state (a negative pressure space indicated by S1 in FIG. 5B), and the viscous material P is sucked into the viscous material transfer space S from the viscous material suction port 2 side. . At this time, the suction-side movable sealing valve 18 below the viscous material suction port 2 is in a closed swinging direction so as to close the viscous material transfer space S by tightly contacting the outer peripheral surface of the piston 11 in close contact with each other. Since the elastic material is energized, the viscous material P is dammed so as not to move downward from the position of the viscous material suction port 2, thereby causing the viscous material due to the negative pressure from the viscous material suction port 2 to the inside of the cylinder 1. The suction power of P is increased.

  As shown in FIG. 5 (c), the piston 11 is further rotated 90 ° clockwise from the viscous material suction port 2 side toward the viscous material discharge port 3 side (A in the elliptical long axis direction of the piston 11). When the point is diagonally down to the right, the discharge starts.

  As shown in FIG. 5D, the piston 11 is further rotated 45 ° clockwise from the viscous material suction port 2 side toward the viscous material discharge port 3 side (A in the elliptical long axis direction of the piston 11). Point is down). Then, the middle part of the other side surface in the elliptical short axis direction of the piston 11 (middle of the elliptical side surface BA) faces the viscous material discharge port 3 of the cylinder 1, and the inner peripheral wall surface of the cylinder 1 on the viscous material discharge port 3 side, A substantially arcuate space surrounded by the other side surface in the elliptical short axis direction facing the viscous material discharge port 3 of the piston 11, the rear sealing side plate 5, and the front sealing side plate 7 is in a positive pressure state (FIG. 5). (D), a positive pressure space indicated by reference numeral S2), and the viscous material P is discharged outward from the viscous material transfer space S through the viscous material discharge port 3. At this time, the discharge-side movable sealing valve 17 below the viscous material discharge port 3 is in a closed swinging direction so as to close the viscous material transfer space S by tightly contacting the outer peripheral surface of the piston 11 in close contact with each other. Since the elastic material is energized, the viscous material P is blocked so that the viscous material P does not move downward from the position of the viscous material discharge port 3, and thereby the viscosity due to the positive pressure from the viscous material discharge port 3 to the outside of the cylinder 1. The discharge force of the object P is increased.

  In the present embodiment, the outer diameter of the cylinder 1 is approximately 150 mm, the inner diameter is approximately 120 mm, the width is approximately 75 mm, the long axis side width of the piston 11 is approximately 120 mm, and the short axis width is approximately 50 mm. By doing so, it can be configured to be small and light, and, as will be described later, for example, it can be easily carried in and used at a work site such as a mortar filling site.

  Next, as an example of use of the configuration configured as described above, a case where viscous material P such as cement mortar for concrete is transferred will be described with reference to FIG. In the rotary pump, the elliptical piston 11 in the cylinder 1 is connected to the output drive shaft L in which the driving force from the driving source M such as a rotation driving motor provided with the speed reduction mechanism MG is appropriately reduced by the speed reduction mechanism MG. The movable table of the two-wheeled carriage 31 having a front table 34 and a rear support leg 35 on a mounting table 32 having a movable table 33 that slides forward and backward, and a U-shaped frame-shaped gripping portion 36 on the upper surface of the rear. 33 is mounted with a rotary pump for transferring viscous material. A trumpet-shaped suction device 41 is connected to the viscous material suction port 2 of the cylinder 1 through a suction pipe 42 for suctioning cement mortar as the viscous material P stored in the basket Q. A nozzle-shaped discharge device 43 for discharging the viscous material P in the cylinder 1 to a predetermined place is connected to the viscous material discharge port 3 of the cylinder 1 via a discharge pipe 44. Thus, after the rotary pump for transferring the viscous material is carried to the side Q by the two-wheel carriage 31, the viscous material P is sucked into the cylinder 1 from the suction device 41 by the start of the drive source M, and based on the above-described operating principle. Then, the viscous material P is discharged from a discharge device 43 connected to the cylinder 1 to a predetermined place. In addition, it is good to arrange | position the pulsation prevention device which prevents the pulsation of the viscous material P and equalizes discharge amount on the discharge side.

P ... viscous material S ... viscous material transfer space S1 ... negative pressure space S2 ... positive pressure space M ... drive source MG ... deceleration mechanism L ... output drive shaft Q ... 桶 1 ... cylinder 2 ... viscous material inlet 3 ... viscous material Discharge port 4 ... barrel 5 ... rear sealing side plate 5A ... drive bearing 6 ... middle frame 6A ... circular opening 7 ... front sealing side plate 7A ... packing member 8A, 8B ... guide rail 9A, 9B ... guide groove DESCRIPTION OF SYMBOLS 11 ... Piston 11A ... Shaft hole 12 ... Close elastic member 13 ... Liquid storage part 14 ... Lubricating fluid communication hole 15 ... Adjustment bolt 16 ... Press adjustment part 17 ... Movable sealing valve 18 ... Movable sealing valve 19 ... Air vent part 19A DESCRIPTION OF SYMBOLS ... Sealing member 20 ... Liquid injection | pouring part 20A ... Sealing lid 21A ... Key protrusion 21B ... Key groove 22A, 22B ... Spiral spring 23A, 23B ... Spindle 31 ... Two-wheel carriage 32 ... Mounting stand 33 ... Movable stand 34 ... Front wheel 35 ... rear support leg 36 ... gripping part 4 ... suction device 42 ... suction tube 43 ... dispenser 44 ... discharge pipe

Claims (5)

  Cylinder having a viscous material transfer space portion formed as a cavity having a circular cross section and having a viscous material suction port on one side and a viscous material discharge port on the other side so as to communicate with the viscous material transfer space portion And an elliptical piston that is rotationally driven by a drive source while the outer peripheral surface is covered with a close elastic member that is in close contact with the inner peripheral wall surface of the cylinder and the side surface in the elliptical long axis direction is in sliding contact with the inner peripheral wall surface of the cylinder. A liquid storage portion that is sealed and filled with a sealing lubricant between the substantially planar side walls of the piston and the cylinder so as to support the close elastic member from the inside of the piston and maintain contact between the inner surface of the cylinder and the close elastic member. A rotary pump for transferring a viscous material, characterized by comprising: .
2. The piston according to claim 1, wherein the liquid storage portion is formed in a concave shape on both side surfaces of the piston, and each liquid storage portion is communicated by a lubricating liquid communication hole penetrating the side surface of the piston itself. Rotary pump for viscous material transfer.   The piston includes an adjustment bolt that is screwed into the lubricating fluid communication hole along the elliptical long axis direction, and a pressure adjustment portion that is supported by one end of the adjustment bolt and press-contacted inside the elastic member. The viscous material transfer according to claim 2, wherein adjustment of the pressing force of the tightly elastic member against the inner peripheral wall surface of the cylinder is enabled by changing the pressing force of the pressing adjusting portion by adjusting or screwing in the adjusting bolt. Rotary pump.   The inner peripheral wall surface located below the viscous material suction port and the viscous material discharge port in the viscous material transfer space of the cylinder is opened, and a pair of movable sealing valves on the suction side and the discharge side are arranged to face each other. Both movable sealing valves are elastically urged in the closing and swinging directions so as to close the viscous material transfer space portion by close pressure contact with the outer peripheral surface of the piston from both sides in close contact with each other. Any one of the rotary pumps for viscous material transfer.   One side of the cylinder is provided with a liquid injection part filled with a sealing lubricant in the liquid storage part and sealed with a sealing lid, and the other side of the cylinder is provided with a sealing lubricant from the liquid injection part. The rotary pump for viscous material transfer according to any one of claims 1 to 4, further comprising an air venting portion that allows air in the liquid storage portion to be extracted and sealed with a sealing member.

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