JP3929537B2 - Squeeze pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a squeeze pump used to transport viscous materials such as concrete and mortar.
[0002]
[Prior art]
In construction sites, squeeze pumps are used to transport concrete and mortar from the hopper to the placement position. A squeeze-type pump usually has a short cylindrical casing, an elastic pumping tube disposed over almost a half of the inner peripheral surface of the casing, and a rotor disposed rotatably in the casing. A plurality of squeeze rollers are rotatably supported on the outer periphery of the rotor, and each squeeze roller rotates while pressing the pumping tube disposed along the inner peripheral surface of the casing as the rotor rotates. It comes to move. When the pumping tube is sequentially pressed by each squeeze roller, a viscous material such as mortar flows into the inside from one end of the pumping tube, and the viscous material such as mortar that has flowed into the pumping tube flows into the pumping tube. It is squeezed from the other end by the pumping action.
[0003]
[Problems to be solved by the invention]
In such a squeeze pump, the rotor to which the squeeze roller is attached is usually disposed in a casing that is in a substantially sealed state. For this reason, when each squeeze roller rolls on the pumping tube arranged along the inner peripheral surface of the casing by the rotation of the rotor, the frictional heat generated during the rolling is not discharged to the outside of the casing, The inside may become hot. When the inside of the casing becomes hot, deterioration of the pumping tube is promoted, so that the pumping tube cannot be stably used for a long time. As a result, the pumping tube must be replaced frequently. Moreover, since the inside of the casing becomes hot, deterioration of parts such as a bearing for rotatably supporting the rotor is promoted, and parts such as the bearing may be damaged early.
[0004]
The present invention solves such a problem, and an object of the present invention is to provide a squeeze pump that can prevent the inside of a casing from becoming hot and suppress deterioration of a pumping tube or the like. There is.
[0005]
[Means for Solving the Problems]
The squeeze pump according to the present invention includes a cylindrical casing, an elastic pumping tube disposed so as to be substantially along the inner circumference of the casing, and a pumping tube sequentially pressed along the inner circumference of the casing. A rotor disposed rotatably in the casing so as to suck fluid from one end of the pumping tube and discharge fluid from the other end, and transmit power to the rotor. Therefore, a transmission mechanism arranged outside the casing is provided, and a ventilation hole is provided in the end surface portion on the front side of the casing so that air flows through the inside of the casing, and the ventilation hole has air permeability. And a belt cover that covers the transmission mechanism .
[0006]
[Embodiment]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0007]
FIG. 1 is a front view showing an example of an embodiment of a squeeze pump according to the present invention, and FIG. 2 is a partially broken plan view thereof.
[0008]
The squeeze-type pump is disposed in a cylindrical casing 10 that is horizontally disposed, a pumping tube 20 that is disposed substantially along the inner circumference of the casing 10, and a casing 10 that is rotatable. The rotor 30 (see FIG. 2) and a power transmission mechanism 40 that transmits power to the rotor 30 are provided.
[0009]
The casing 10 has a short cylindrical casing body 11. The casing body 11 is provided with cylindrical guide portions 13 and 14 extending in the same direction along the tangential direction from the peripheral surface of the casing 10 at the uppermost and lowermost portions, respectively. Each guide part 13 and 14 and the inside of the casing main body 11 are in the state which connected by the opening part provided in the surrounding surface of the casing main body 11, respectively.
[0010]
The pumping tube 20 disposed inside the casing body 11 is disposed along substantially half the circumference of the inner peripheral surface of the casing body 11 such that each end portion extends from each guide portion 13 and 14. A tube (not shown) to which a fluid such as mortar is supplied is connected to the end of the pumping tube 20 extending from each lower guide portion 14 by a nipple 21. A tube (not shown) for conveying a fluid such as mortar to a predetermined position is connected to the end of the pumping tube 20 by a nipple 22.
[0011]
Casing body 11 has an end face portion 11a of the front side is closed, through the occluded end face portion 11a, a rotor 30 disposed inside the casing body 11 and the transmission mechanism 40 is connected. The end surface on the back side of the casing body 11 is in an open state, and after the pumping tube 20, the rotor 30, etc. are arranged inside the casing body 11, the casing body 11 is closed by the casing cover 12, Further, the casing cover 12 is covered with a disk-shaped side cover 15.
[0012]
As shown in FIG. 2, the rotor 30 disposed inside the casing body 11 can rotate in a concentric state with the casing 10, and a plurality of squeeze rollers 31 are arranged in the circumferential direction on the outer peripheral portion thereof. It is arranged with an interval equal to. Each squeeze roller 31 is rotatably supported in a state along the axial direction of the casing 10, and rolls while pressing the pumping tube 20 disposed along the inner peripheral surface of the casing 10. It is like that.
[0013]
A rotary shaft 32 that rotates integrally with the rotor 30 is provided at the axial center of the rotor 30. The rotating shaft 32 passes through the center of the front end surface portion 11 a of the casing body 11 and extends to the side of the casing body 11. A rotor-side pulley 41 in the transmission mechanism 40 is attached to the end of the rotating shaft 32 extending to the side of the casing body 11.
[0014]
The power transmission mechanism 40 is configured to transmit the rotation of the motor 44 provided on the side opposite to the direction in which each end of the pumping tube 20 in the casing 10 extends to the rotating shaft 32 of the rotor 30. The output shaft 44a of the motor 44 is parallel to the axial center of the casing 10 and extends in the same direction as the extending direction of the rotating shaft 32 of the rotor 30. The output shaft 44a is connected to the motor side of the transmission mechanism 40. A pulley 42 is attached. A V-belt 43 is wound around the motor-side pulley 42 and a rotor-side pulley 41 provided on the rotating shaft 32 of the rotor 30. The rotation of the motor 44 is transmitted to the rotating shaft 32 of the rotor 30 via the motor-side pulley 42, the V-belt 43, and the rotor-side pulley 41.
[0015]
The rotor-side pulley 41, the motor-side pulley 42, and the V-belt 43 of the transmission mechanism 40 are covered with a belt cover 45 that is attached to the end surface portion 11a of the casing body 11. In the belt cover 45, a vertical front cover portion 45a facing the rotor-side pulley 41 and the motor-side pulley 42 is made of punching metal.
[0016]
As shown in FIG. 1, four vent holes 11 b are provided around the rotation shaft 32 at equal intervals in the circumferential direction on the end surface portion 11 a of the casing body 11 through which the rotation shaft 32 of the rotor 30 passes. It has been. Each air hole 11b is covered with the belt cover 45, and therefore the inside of the casing body 11 is formed by each air hole 11b and a front cover portion 45a formed by punching metal in the belt cover 45. , Communicate with the outside.
[0017]
FIG. 3 is a back surface portion of the casing 10. Three through holes 12a are provided at equal intervals in the circumferential direction in the casing cover 12 that covers the open end face of the casing body 11 on the back side. Each through-hole 12a is configured in a fan-like shape with the same central angle at the center side portion excluding the outer peripheral edge of the casing cover 12, and all the through-holes 12a are formed by the disc-shaped side cover 15. Covered. The side cover 15 is provided with three circular vent holes 15a facing each through hole 12a of the casing cover 12 with an equal interval in the circumferential direction. The side cover 15 is attached to the casing cover 12 by a bolt 16 that passes through the center portion.
[0018]
The squeeze pump having such a configuration operates as follows. When the motor 44 is rotated and its output shaft 44a is rotated, the rotation of the output shaft 44a is transmitted to the rotating shaft 32 of the rotor 30 via the motor-side pulley 42, the V-belt 43, and the rotor-side pulley 41, and the casing. The rotor 30 in 10 is rotated. And by rotation of the rotor 30, each squeeze roller 31 provided in the outer peripheral part of the rotor 30 presses sequentially the pumping tube 20 arrange | positioned along the internal peripheral surface of the casing main body 11, rolling. .
[0019]
When each squeeze roller 31 sequentially moves from the lower side to the upper side along the inner peripheral surface of the casing body 11 while pressing the pumping tube 20, a viscous material such as mortar passes through the tube from a hopper (not shown). 20 and flows in the pumping tube 20 by the pumping action of the pumping tube 20 by the squeeze roller 31. When each squeeze roller 31 reaches the upper part of the casing body 11, a mortar or other viscous material that has flowed through the pumping tube 20 by each squeeze roller 31 is connected by an upper nipple 22 on the discharge side (not shown). Squeezed inside. Each squeeze roller 31 sequentially presses the pumping tube 20 and rolls, whereby viscous materials such as mortar flowing into the pumping tube 20 are sequentially discharged into the tube on the discharge side. The viscous material such as mortar discharged to the tube on the discharge side is sequentially conveyed to a predetermined position by the tube.
[0020]
In this manner, when each squeeze roller 31 rolls on the pumping tube 20, frictional heat between each squeeze roller 31 and the pumping tube 20 is generated in the casing body 11. However, the inside of the casing main body 11 communicates with the outside through a through hole 12 a provided in the casing cover 12 and a vent hole 15 a provided in the side cover 15, and is provided in the end surface portion 11 a of the casing main body 11. The vent hole 11b and the front cover portion 45a made of a punching metal of the belt cover 45 are also communicated with the outside.
[0021]
In addition, a rotor-side pulley 41 is provided between a vent hole 11b provided in the end surface portion 11a of the casing body 11 and a front cover portion 45a made of a punching metal of the belt cover 45, and this rotor-side pulley is provided. By rotating 41, the air in the casing 10 is discharged through the vent hole 11b and the front cover 45a made of punching metal, and the air in the casing body 11 is discharged, and the through hole 12a and the casing of the casing cover 12 are discharged. Air flows into the casing body 11 through the vent hole 15 a of the cover 15. Thereby, air flows through the inside of the casing body 11, and high heat inside the casing body 11 is reliably discharged to the outside. In addition, since air flows through the inside of the casing body 11 in this manner, generation of high heat due to friction between the squeeze roller 31 and the pumping tube 20 is suppressed.
[0022]
As a result, the pumping tube 20 due to high heat is suppressed, the durability of the pumping tube 20 is remarkably improved, and the pumping tube 20 does not need to be frequently replaced. Further, since deterioration of parts such as bearings is prevented, the durability of the squeeze pump itself is remarkably improved.
[0023]
【The invention's effect】
As described above, the squeeze pump of the present invention is provided with a vent hole in the end surface portion on the front side of the casing, and the vent hole is covered with a belt cover that covers the transmission mechanism and has air permeability . The inside of the casing is reliably prevented from becoming hot. Therefore, the deterioration of the pumping tube or the like disposed inside the casing is surely prevented, and the durability of the squeeze pump is remarkably improved.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of an embodiment of a squeeze pump according to the present invention.
FIG. 2 is a partially broken plan view of the squeeze pump.
FIG. 3 is an enlarged view of a main part on the back side of the squeeze pump.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Casing 11 Casing main body 11a End surface part 11b Vent hole 12 Casing cover 12a Through hole 15 Side cover 15a Vent hole 20 Pumping tube 30 Rotor 31 Squeeze roller 32 Rotating shaft 40 Power transmission mechanism 41 Rotor side pulley 42 Motor side pulley 43 V belt 44 Motor 45 Belt cover 45a Front cover

Claims (1)

One of the pumping tubes is formed by sequentially pressing the pumping tube along the inner peripheral surface of the cylindrical casing, the elastic pumping tube arranged along the inner peripheral surface of the casing, and the inner peripheral surface of the casing. A rotor rotatably disposed inside the casing so as to suck fluid from one end and discharge fluid from the other end, and disposed outside the casing to transmit power to the rotor. A belt cover that covers the transmission mechanism, and is provided with a ventilation hole in the end surface portion on the front side of the casing so that air can flow through the inside of the casing. A squeeze pump characterized by being covered by

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