JPH025777A - Rotary pump for pressure forwarding of concrete - Google Patents

Abstract

PURPOSE:To make a pump for pressure forwarding of concrete in simple construction with a minor space required for installation by protruding a pressure forwarding plate automatically into a pressure forwarding path through utilization of a cam for moving the pressure forwarding plate. CONSTITUTION:A rotor 6 rotated by a driving device is accommodated in a casing 4, which is provided with an inlet 1, an outlet 2, and a bulkhead 3 installed between them. Around this rotor 6 is pressure forwarding plate 8 is fitted movably in the radial direction of the rotor. That portion of this pressure forwarding plate 8 nearer the center of the rotor is either directly or indirectly detained with the peripheral surface of a cam 9, which is mounted on the casing 4 for moving the mentioned pressure forwarding plate, and a spring 11 to press this plate 8 to the cam 9 is interposed between the rotor 6 and a spring receptacle 10 provided on the plate 8 within the rotor 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotary pump used for pumping concrete into a transportation pipeline.

[Conventional technology]

Conventionally, as a rotary pump for compressing concrete, as disclosed in Japanese Patent Application Laid-Open No. 52-81607,
A concrete pumping path is provided between a casing having a concrete inlet and a concrete outlet and a rotor housed therein, and guide portions of three pumping plates are fitted around the rotor so as to be movable in the radial direction of the rotor. combined,
and three hydraulic cylinders are fixed to the rotor to move each pressure feeding plate forward and backward toward the concrete pumping path,
Three hydraulic switching devices for supplying and discharging pressure oil to and from the hydraulic cylinders are provided on the side of the rotor, a grooved cam for controlling the hydraulic cylinders is provided on the side of the casing, and a switching plate in the hydraulic switching device is connected to the groove. 2. Description of the Related Art A rotary pump for pumping concrete that is engaged with a cam is known.

(Problem to be Solved by the Invention) However, in the case of the conventional rotary pump for pumping concrete, the three pumping plates are moved forward and backward toward the pumping path by three hydraulic cylinders, and the three pumping plates attached to each hydraulic cylinder are The switching plate in the two hydraulic switching devices needs to be moved by a grooved cam installed on the side of the casing, resulting in an extremely complex structure and high manufacturing costs.Moreover, a pressure oil supply source is required, which reduces equipment costs. There are problems in that it is expensive and requires a large equipment installation space.

An object of the present invention is to provide a rotary pump for pumping concrete that has a simple structure, can be manufactured at low cost, and requires only a small installation space.

Means for Solving the Problem C] In order to achieve the above object, the rotary pump for pumping concrete of the present invention includes a casing comprising an inlet 1, an outlet 2, and a shielding wall 3 provided between them. 4
A rotor 6 rotated by a drive device 5 is housed therein, and a pressure passage 7 connected to the inlet 1 and the outlet 2 is formed between the casing 4 and the rotor 6. A pressure-feeding plate 8 is fitted to be movable in the radial direction of the rotor, and a portion of the pressure-feeding plate 8 on the rotor center side engages directly or indirectly with the circumferential surface of a cam 9 for moving the pressure-feeding machine provided in the casing 4. A spring 11 is interposed between the rotor 6 and a spring receiving portion 10 provided on the pressure-feeding plate 8 in the rotor 6, and the spring 11 presses the pressure-feeding plate 8 toward the cam 9. When the pressure-feeding plate 8 is inside the shielding wall 3, the pressure-feeding plate 8 is drawn into the rotor 6, and when the pressure-feeding plate 8 is separated from the inside of the shielding wall 3, the pressure-feeding plate 8 is pulled into the pressure-feeding path 7. It is curved so that it protrudes.

[For production]

A plurality of pressure-feeding plates 8 fitted around the rotor 6 are provided with a spring 1 on the circumferential surface of a cam 9 for moving the pressure-feeding machine provided in the casing 4.
1 and when the drive device 5 is operated, the rotor 6 is rotated, and each pressure feeding plate 8 is rotated by the rotor 6.
is rotated, and each pumping plate 8 is projected into the pumping path 7 by the pumping machine moving cam 9, and the concrete is transferred to the casing 4.
After descending from the inlet 1 to the starting end of the pumping path 7, the rotation of the pumping plate 8 forces the liquid through the pumping path 7 and the outlet 2 of the casing 4.

〔Example〕

Next, the present invention will be explained in detail using illustrated examples.

1 to 3 show a first embodiment of the invention, which has - an inlet 1 and an outlet 2 at the lower and upper sides of the side, and a shielding wall 3 provided between them; A casing 4 provided therein is fixed to a support stand 12, and a circular rotor 6 that contacts the arcuate inner surface of the shielding wall 3 is disposed inside the casing 4, and is fixed to the center part of the side plate of the rotor 6. The horizontal rotating shaft 13 is rotatably supported by the casing 4 via a bearing, and a pressure passage 7 connected to the inlet 1 and the outlet 2 is provided between the periphery inside the casing 4 and the circumferential surface of the rotor 6. It is being

A drive device 5 consisting of an electric motor 14 and a speed reducer 15 connected thereto is fixed to the support base 12.
A drive gear 16 fixed to the output shaft of the rotor 6 is meshed with a driven gear 17 fixed to the rotating shaft 13, and the rotor 6 is rotated by the drive device 5. A plurality of (four in the illustrated case) pressure feeders [8] arranged at equal intervals around the rotor 6 are fitted to be slidable in the radial direction of the rotor, and the rotor is disposed at the center of the casing 4. A pressure feeding machine moving cam 9 having a peripheral surface surrounding the rotation center of the rotor 6 is provided, and a support shaft 18 parallel to the center line of the rotor 6 is provided on the rotor center side of each pressure feeding plate 8. A roller 19 is rotatably fitted in 18 .

Spring receiving portion lO provided on the pumping plate 8 in the rotor 6
A spring 11 that presses the pressure plate 8 toward the cam 9 is interposed between the pressure plate 8 and the rotor 6.
A roller 19 is pressed against the circumferential surface of the cam 9, and the circumferential shape of the cam 9 is such that when the pressure plate 8 is inside the shielding wall 3, the pressure plate 8 is drawn into the rotor 6, and As the pressure feeding plate 8 moves away from the inside of the shielding wall 3,
The pressure-feeding plate 8 is made to protrude from the periphery of the rotor 6, and the pressure-feeding path 7
At the middle part of the pumping path 7, the leading edge of the pressure feeding plate 8 is brought close to the inner circumferential surface of the casing 4, and as the pressure feeding plate 8 approaches the shielding wall 3 from the middle part of the pumping path 7, the pressure feeding plate 8 is moved into the rotor 6. It is set to retract and move.

A grid 21 is fixed to the upper end opening of the hopper 20 supported by the support stand 12, and an intermediate shaft 22 extending parallel to the rotating shaft 13 is rotatably supported by a bearing fixed to the hopper 20. A driven shaft 23 extending parallel to the rotating shaft 13 is inserted into the hopper 20 and rotatably supported by a bearing fixed to the hopper 20, and a discharge port 24 at the bottom of the hopper 20 is connected to the casing 4. A number of inclined agitation and transfer members 25 are connected to the inlet 1 of the hopper 20 and around the driven wheel 23 for agitating and mixing the concrete charged into the hopper 20 and transferring the concrete toward the discharge port 24. is attached to the outlet 2 of the casing 4, and one end of a concrete transport pipe 26 made of a hose is connected to the outlet 2 of the casing 4.

A transmission chain 29 is wound around a driving sprocket 27 fixed to the rotating shaft 13 and a driven sprocket 28 fixed to the intermediate shaft 22.
A driving sprocket 30 and a driven shaft 23 fixed to the end of the
A transmission chain 32 is wound around a driven sprocket 31 fixed to the end of the drive sprocket.

When the drive device 5 is operated, the driven shaft 23 rotates each inclined stirring transfer member 25, and the rotor 6 rotates each pumping plate 8, and the concrete charged into the hopper 20 is transferred to the inclined stirring transfer member 25. After being stirred and mixed by the casing 4 and transferred toward the discharge port 24,
The concrete is transported downward from the population 1 to the starting end of the pumping path 7, and is then pumped into the concrete transport pipe 26 through the pumping path 7 and the outlet 2 of the casing 4 by rotation of the pumping plate 8 protruding from the rotor 6. .

4 to 6 show a second embodiment of the present invention, in which an inlet 1 is provided in the upper part of the casing 4, and an outlet 2 is provided in the lower side of the casing 4. The other configurations are the same as in the first embodiment.

When carrying out this invention, a hydraulic motor may be used as the drive device 5, and instead of installing the roller 19 on the rotor center side of the pressure feeding plate 8, a synthetic resin motor provided on the rotor center side of the pressure feeding plate 8. A sliding shoe may be slidably engaged with the circumferential surface of the cam 9.

〔Effect of the invention〕

Since this invention is configured as described above, it produces the effects described below.

By simply rotating the rotor 6 and the plurality of pressure-feeding plates 8 fitted therein by the drive device 5, the pressure-feeding machine moving cam 9 is used to automatically project the pressure-feeding plates 8 into the pressure-feeding path 7. , when the pressure plate 8 passes through the shielding wall 3, the pressure plate i8 can be pressed by the spring 11 and automatically retracted into the rotor 6, and therefore the pressure plate 8 can be moved in a protruding manner by extremely simple means. Since it can be retracted and moved, the structure of the rotary pump for concrete pumping can be significantly simplified and manufactured at low cost.
Furthermore, since it does not require a pressure oil supply source that is required in the case of the conventional rotary pump for pumping concrete, there are advantages such as no need for additional equipment costs and a small installation space for the pump equipment.

[Brief explanation of the drawing]

1 to 3 show a rotary pump for pumping concrete according to a first embodiment of the present invention, in which FIG. 1 is a partially longitudinal side view, FIG. 2 is a partially longitudinal front view, and FIG. FIG. 3 is a partially cutaway plan view. 4 to 6 show a rotary pump for pumping concrete according to a second embodiment of the present invention, in which FIG. 4 is a partially longitudinal side view, FIG. 5 is a partially longitudinal front view, and FIG. FIG. 6 is a partially cutaway plan view. In the figure, 1 is an inlet, 2 is an outlet, 3 is a shielding wall, 4 is a casing, 5 is a drive device, 6 is a rotor, 7 is a pumping path, 8 is a pumping plate, 9 is a cam for moving the pumping machine, 10 is a spring Receiving part, 11
13 is a rotating shaft, 14 is an electric motor, 15 is a reduction gear,
16 is a driving gear, 17 is a driven gear, 18 is a support shaft, 19 is a roller, 20 is a hopper, 23 is a driven shaft, 24 is a discharge port,
25 is an inclined agitation transfer member, and 26 is a pipe for transporting concrete.

Claims (1)

[Claims] A rotor 6 rotated by a drive device 5 is housed in a casing 4 having an inlet 1 and an outlet 2 and a shielding wall 3 provided between them, and between the casing 4 and the rotor 6 the rotor 6 is rotated by a drive device 5. A pressure feeding path 7 connected to the inlet 1 and the outlet 2 is formed, a plurality of pressure feeding plates 8 are fitted around the rotor 6 so as to be movable in the rotor radial direction, and a portion of the pressure feeding plates 8 on the rotor center side is A spring receiving portion 1 that is directly or indirectly engaged with the circumferential surface of a pressure-feeding plate moving cam 9 provided on the casing 4 and provided on the pressure-feeding plate 8 in the rotor 6.
A spring 11 that presses the pressure plate 8 toward the cam 9 is interposed between the pressure plate 8 and the rotor 6. This rotary pump for pumping concrete is curved so that the pumping plate 8 is retracted into the rotor 6 and the pumping plate 8 is projected into the pumping path 7 when the pumping plate 8 is separated from the inside of the shielding wall 3.