JP2000034976A - Slurry press-feeding pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a slurry press-feeding pump which is reduced in clogging of a piping and abrasion thereof, facilitated in maintenance and smooth press- feeding of the slurry. SOLUTION: A pair of slurry suctioning/discharging portions 2, 2 are formed on a base 1 in an axially rotatable manner. A fixation part 5 having a slurry suctioning hole 6 and a slurry discharging hole 4 are formed on the base 1. The paired slurry suctioning/discharging portions 2, 2 are unitedly rotated in an intermittent manner every 180 degree, for communicating the slurry suctioning/discharging portions 2, 2 alternatively with the slurry suctioning hole 3 and the slurry discharging hole 4. The suctioning and discharging operations of the portions 2, 2 are alternatively switched.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a slurry pump.

[0002]

2. Description of the Related Art A conventional slurry pump for pumping a slurry of concrete, mortar, sludge or the like at a construction site or the like is arranged in series with a slurry cylinder cylinder and a slurry cylinder cylinder via a washing box. A slurry suction cylinder including a hydraulic cylinder cylinder provided, a slurry piston provided in the slurry cylinder cylinder, a hydraulic piston provided in the hydraulic cylinder cylinder, and a rod connecting the slurry piston and the hydraulic piston. A pair of discharge units are provided, and a valve mechanism is provided at the opening end of each slurry cylinder body, and the suction and discharge operations of the pair of slurry suction and discharge units are alternately switched to discharge the slurry intermittently. Was.

[0003] The valve mechanism includes the following. It has a trunk swingably provided on the slurry discharge pipe and a trunk switching cylinder for swinging the trunk, and the trunk is swung to one of a pair of slurry cylinder cylinders inserted into the slurry hopper by swinging the trunk. Are communicated, the slurry in the slurry cylinder body is discharged, and the other slurry cylinder body is opened in the slurry hopper to suck in the slurry, and this is repeated alternately. A slurry hopper is provided above the pair of slurry cylinder cylinders in a communicating manner, and a plate-like slide valve having a hole is provided between the slurry cylinder cylinder and the slurry hopper, and the slide valve is horizontally reciprocated. Thus, the respective slurry cylinder cylinders are alternately communicated with and closed by the slurry hopper, and the slurry is alternately sucked and discharged by the respective slurry cylinder cylinders. A hollow block is provided in a communicating manner between each opening of the pair of slurry cylinder cylinders and the slurry discharge pipe, and a slurry hopper is provided in a communicating manner above the block, and further, a skirt is provided in the block. Provide a cylindrical body,
The skirt-shaped cylinder is reciprocated so that one of the slurry cylinders and the slurry discharge pipe communicate with each other to discharge the slurry, and the other slurry cylinder and the slurry hopper are communicated with each other to suck the slurry and alternately. repeat.

[0004]

However, in such a valve mechanism, when switching between the suction hole and the discharge hole, both holes are sometimes opened, so that the degree of vacuum does not increase and suction is difficult. In some cases, the slurry could not be sucked in with a slump (soft) slurry. Also,
Since the valve mechanism has a complicated structure and a complicated flow path for the slurry, the pipe resistance is large and the inside of the pipe is often clogged, and the valve is worn quickly. In particular, a high pressure was applied to the valve due to the weight of the slurry discharged to a high place and the like, and the sliding portion was significantly worn.

Accordingly, the present invention reduces the number of failures due to clogging of pipes and abrasion, facilitates maintenance,
An object of the present invention is to provide a slurry pump for smoothly feeding a slurry.

[0006]

In order to achieve the above-mentioned object, a slurry pump according to the present invention comprises a slurry cylinder tube, and a hydraulic cylinder tube arranged in series with the slurry cylinder tube. A slurry piston provided in the slurry cylinder body, a hydraulic piston provided in the hydraulic cylinder body, and a rod connecting the slurry piston and the hydraulic piston, A pair of bases is provided on the base so as to be rotatable about one axis, and a fixed part having a slurry suction hole and a slurry discharge hole is provided on the base, and the pair of slurry suction / discharge parts are integrally intermittently interposed every 180 °. By rotating, the openings of the respective slurry cylinder cylinders are alternately communicated with the slurry suction holes and the slurry discharge holes, and the suction / discharge operation of each slurry suction / discharge unit is controlled. In which was to switch each other.

A slurry cylinder cylinder, a hydraulic cylinder cylinder disposed in series with the slurry cylinder cylinder, a slurry piston provided in the slurry cylinder cylinder, and a slurry piston provided in the hydraulic cylinder cylinder. Two pairs of slurry suction and discharge sections each including a hydraulic piston and a rod for connecting the slurry piston and the hydraulic piston are provided on the base so as to be rotatable around one axis, and a pair of slurry suction holes and a pair of slurry suction holes are provided. A fixed portion having a slurry discharge hole is provided on a base, and two pairs of the slurry suction and discharge portions are integrally formed.
By rotating intermittently every 90 °, the opening of each pair of slurry cylinder cylinders alternately communicates with the slurry suction hole and the slurry discharge hole, and the suction / discharge operation of each pair of slurry suction / discharge portions is performed. The switching is performed alternately.

In addition, a first sliding contact plate having a slurry suction hole and a slurry discharge hole is provided in a fixed portion, and a second sliding contact plate having a communication hole which can communicate with the slurry suction hole and the slurry discharge hole is provided in a slurry cylinder. The second sliding contact plate is fixed to the opening end of the cylindrical body, and the second sliding contact plate is slidably rotated with respect to the first sliding contact plate to open the opening of each slurry cylinder cylindrical body through the communication hole with the slurry suction hole and the slurry discharge port. The hole is made to communicate with the hole in a sealed manner.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIGS. 1 and 2 show an embodiment of the present invention. This slurry pumping pump comprises a base 1 and a pair of slurry provided on the base 1 so as to be rotatable around one axis P. It has suction and discharge portions 2 and 2 and a fixed portion 5 provided on the base 1 and having a slurry suction hole 3 and a slurry discharge hole 4.

More specifically, as shown in FIGS. 1 to 4, the fixing portion 5 includes a first disc-shaped sliding contact plate 12 having a slurry suction hole 3 and a slurry discharge hole 4, and a first sliding contact plate 12. It has a suction tube 13 and a discharge tube 14 fixed to the flat portion of the contact plate 12. That is, the uniaxial center P passing through the center point of the first sliding contact plate 12
The above-mentioned slurry suction hole 3 and slurry discharge hole 4 are formed around the axis, and the suction cylinder 13 and the discharge cylinder 14 project from the first sliding contact plate 12 so as to communicate with the slurry suction hole 3 and the slurry discharge hole 4. The respective holes of the suction tube 13 and the discharge tube 14 are also formed as a slurry suction hole 3 and a slurry discharge hole 4.

The slurry suction / discharge unit 2 includes a slurry cylinder tube 6, a hydraulic cylinder tube 7 arranged in series with the slurry cylinder tube 6, a slurry cylinder tube 6, and a hydraulic cylinder tube 7 , A slurry piston 9 provided in a slurry cylinder 6, a hydraulic piston 10 provided in a hydraulic cylinder 7, and a slurry piston 9. And a rod 11 for connecting to the hydraulic piston 10.

Then, a pair of slurry suction and discharge sections 2 and 2
A second sliding contact plate 15 is provided at an open end of the pair of slurry cylinder cylinders 6, 6, a rotary joint 16 is provided at an end of the pair of hydraulic cylinder cylinders 7, 7, and The washing box 8 is provided so as to be integrated in parallel with each other.

The second sliding contact plate 15 has a disk shape having an outer diameter substantially equal to that of the first sliding contact plate 12, and communicates with the openings 17, 17 of the pair of slurry cylinder cylinders 6, 6, and 1st sliding contact plate
A pair of communication holes 18, 18 that can communicate with the twelve slurry suction holes / discharge holes 3, 4 are provided.

The first sliding contact plate 12 is mounted on the base 1 such that the slurry discharge holes 4 and the slurry suction holes 3 are arranged vertically.
And the sliding contact surface 20 of the second sliding contact plate 15 is superimposed on the sliding contact surface 19 of the first sliding contact plate 12, and the first sliding contact surface 20 is formed by an arc member 21 having a U-shaped cross section. A plurality of outer peripheral edges of the second sliding contact plates 12 and 15 are externally connected to each other so that the pair of slurry suction and discharge portions 2 and 2 can be rotated about the horizontal axis P with respect to the fixed portion 5; It is attached to the table 1.

More specifically, as shown in FIGS. 1 to 5, a plurality of arc members 21 are fixed only to the first sliding contact plate 12 side, and the second sliding member 15 is attached to the arc members 21. It is slidable and rotatable. The second sliding contact plate 15 is supported by a pair of rollers 22, 22 rotatably connected to one end of the base 1, and the rotating part 25 of the rotary joint 16 is connected to the other end of the base 1. The rotatable joint 16 is rotatably supported by a bearing member 24 (such as a pillow block) provided thereon, and the fixing portion 23 of the rotary joint 16 is fixed to the base 1 via a fixing member 36 protruding therefrom. Further, for example, U is provided between the first and second sliding contact plates 12 and 15.
A packing 29 is provided.

A large wheel wheel 30 is provided on the second sliding contact plate 15 on the side of the slurry cylinder 6, and a motor M is provided on the base 1 below the slurry cylinder 6.
The small chain wheel 31 provided on the drive shaft of the motor M and the large chain wheel 30
Is suspended by a chain 32. Then, by driving the motor M, the pair of slurry suction / discharge units 2 are integrally rotated around the horizontal axis P. The chain wheel and the chain may be a pulley and a belt.

As shown in FIGS. 1 and 5, the rotary joint 16 is
The fixing portion 23 fixed to the base 1 via a fixing member 36
And a rotating part 25 rotatably supported by a bearing member 24 of the base 1 and fitted externally at a fixed part 23 and connected to the pair of hydraulic cylinder cylinders 7, 7. Then, oil is supplied from the external hydraulic pump 26 to one or the other hydraulic cylinder cylinder 7 through the solenoid valve 27 and the oil passage 28 of the rotary joint 16, and the oil is supplied from the other or the one hydraulic cylinder cylinder 7. Oil is recovered to the hydraulic pump 26 through the oil passage 28 of the joint 16 and the electromagnetic valve 27.

Next, the pumping operation by the slurry pump of the present invention will be described. FIGS. 1 and 2 show a state before the pressure feeding operation, in which a pair of slurry suction / discharge units 2 and 2 is set at an up and down position, and upper and lower slurry cylinder cylinders 6 and 6 are discharged cylinders.
14 and the suction cylinder 13 are in communication. At this time, the slurry piston 9 and the hydraulic piston 10 of the lower slurry suction / discharge unit 2 (2a) are at the top dead center, and the slurry piston 9 and the hydraulic piston 10 of the upper slurry suction / discharge unit 2 (2b).
Is at the bottom dead center. L indicates the stroke of the slurry piston 9.

A connecting pipe from the slurry hopper 33
34 is connected to the lower suction cylinder 13 and a supply pipe 35 for supplying slurry to a desired location is connected to the upper discharge cylinder.
Connected to 14.

Next, as shown in FIG. 1, FIG. 5, and FIG. 6, when the hydraulic pump 26 is driven, oil is supplied into the hydraulic cylinder cylinder 7 of the upper slurry suction / discharge section 2 (2b). The slurry piston 9 is pressed via the hydraulic piston 10 and the rod 11 and moves to the top dead center. Further, oil is discharged from the inside of the hydraulic cylinder tube 7 of the lower slurry suction / discharge unit 2 (2a), the slurry piston 9 moves to the bottom dead center, and the slurry piston 9 moves into the lower slurry cylinder tube 6 from the slurry hopper 33. The slurry S is sucked.

Thereafter, as shown in FIGS. 1, 3 and 7,
When the motor M is driven, the pair of slurry suction / discharge units 2 and 2 are integrally rotated by 180 ° about the horizontal axis P, and the slurry S
Is moved to a position corresponding to the discharge tube 14 of the fixed portion 5, and the empty slurry suction and discharge portion 2 (2 b) is moved to the position of the suction tube 13 of the fixed portion 5. Move to the corresponding position and flip it upside down. At this time, the first
The second sliding contact plate 15 rotates 180 ° while slidingly contacting the sliding contact plate 12, and opens through the communication holes 18, 18 of the second sliding contact plate 15 to open the openings 17, 17 of the slurry cylinder cylinders 6, 6. 17 communicates with the slurry suction hole 3 and the slurry discharge hole 4 in a hermetically sealed manner (see FIG. 4).
That is, the first and second sliding contact plates 12, 15 serve as valves.

Thereafter, as shown in FIG. 1 and FIG.
27 (see FIG. 5) is switched to the upper slurry suction and discharge section 2
Oil is supplied into the hydraulic cylinder cylinder 7 of (2a),
The slurry piston 9 is pressed by the hydraulic pressure and the slurry S in the slurry cylinder 6 is discharged from the slurry discharge hole 4. Further, oil is discharged from the inside of the hydraulic cylinder cylinder 7 of the lower slurry suction / discharge unit 2 (2b), the slurry piston 9 moves to the bottom dead center, and the slurry hopper
The slurry S is sucked from 33 through the slurry suction hole 3 into the lower slurry cylinder 6.

Thereafter, as described with reference to FIG. 7, the pair of slurry suction / discharge sections 2 and 2 are integrally formed around the horizontal axis P.
The operation is repeated so that the slurry S is turned upside down and turned upside down, and the slurry S is discharged from the upper slurry cylinder cylinder 6 to the outside, and the slurry S is sucked into the lower slurry cylinder cylinder 6. In other words, the pair of slurry suction / discharge units 2 and 2 are rotated intermittently every 180 ° to form the openings 17 and 17 of each of the slurry cylinder cylinders 6 and 6.
The slurry S is intermittently communicated with the slurry suction holes 3 and the slurry discharge holes 4 of the fixed portion 5, and the suction and discharge operations of the slurry suction and discharge portions 2 and 2 are alternately switched to intermittently discharge the slurry S from the discharge cylinder 14. It is configured to perform pressure feeding.

As shown in FIG. 6, during the pressurizing operation of the slurry S, water was poured into the washing box 8 through the window 8a and adhered to the inner surfaces of the respective slurry cylinder cylinders 6, 6. Concrete and mortar are prevented from solidifying. The space between the washing box 8 and each of the cylinder bodies 7, 7 is hermetically sealed with a sealing material.

The present invention is not limited to the above-described embodiment. For example, in the present embodiment, the pair of slurry suction / discharge units 2 and 2 are intermittently rotated in every direction by 180 ° in one direction. However, you may make it rotate intermittently every 180 degrees in the forward and reverse directions. Further, the slurry suction hole 3 and the slurry discharge hole 4 of the fixed portion 5 are arranged on the left and right, or the suction tube 13 and the discharge tube
The 14 openings may be directed upward. In the above embodiment (although not shown), the intermittent rotation at every 180 ° is shown, but the intermittent rotation at every 90 ° may be used freely. In this case, when two slurry cylinders at point-symmetric positions with respect to the axis P are in the suction process, the other two slurry cylinders at point-symmetric positions may be operated in the discharge process. .

[0027]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first or second aspect of the present invention, the integrated slurry suction and discharge sections 2 and 2 are intermittently rotated every 180 ° to alternately rotate the slurry suction holes 3 and the slurry discharge holes 4.
, The suction flow path and the discharge flow path of the slurry S in the valve have a straight structure, the piping resistance is reduced, and the slurry S is hardly clogged. In particular, the pumping resistance is greatly reduced, and the slump (softness)
Even hard slurry S can be pumped smoothly.

According to the second aspect of the present invention, since the suction step and the discharge step can be performed in each of the two slurry suction and discharge sections 2,... (Claim 3
According to this, the structure of the valve mechanism for alternately switching the slurry suction / discharge portions 2 to the suction position / discharge position is simple, and wear due to the slurry S is reduced, so that frequent replacement of parts or disassembly cleaning is required. And maintenance becomes easier.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional front view showing the inside of a slurry suction / discharge unit.

FIG. 3 is an explanatory view showing a connection structure between a second sliding contact plate and a motor.

FIG. 4 is a cross-sectional front view of a main part showing a connection structure of first and second sliding contact plates.

FIG. 5 is an explanatory view showing a structure of a rotary joint.

FIG. 6 is an operation explanatory view showing a suction step of a slurry suction and discharge section.

FIG. 7 is an operation explanatory view showing a state where the slurry suction / discharge unit is rotated by 180 °.

FIG. 8 is an operation explanatory view showing a suction / discharge process of a slurry suction / discharge unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Slurry suction discharge part 3 Slurry suction hole 4 Slurry discharge hole 5 Fixed part 6 Slurry cylinder cylinder 7 Hydraulic cylinder cylinder 9 Slurry piston 10 Hydraulic piston 11 Rod 12 First sliding contact plate 15 Second sliding contact plate 17 Opening 18 Communication hole

Claims (3)

[Claims] 1. A slurry cylinder body 6, a hydraulic cylinder body 7 arranged in series with the slurry cylinder body 6, a slurry piston 9 provided in the slurry cylinder body 6, A slurry suction / discharge unit 2 including a hydraulic piston 10 provided in a hydraulic cylinder cylinder 7 and a rod 11 connecting the slurry piston 9 and the hydraulic piston 10 can be rotated about one axis P. Base 1
And a fixed part 5 having a slurry suction hole 3 and a slurry discharge hole 4 is provided on the base 1, and the pair of slurry suction and discharge parts 2 and 2 are intermittently rotated integrally at every 180 °. Openings 17, 17 of each slurry cylinder cylinder 6, 6
Characterized by alternately communicating with the slurry suction holes 3 and the slurry discharge holes 4 and alternately switching the suction / discharge operation of each of the slurry suction / discharge units 2 and 2. 2. A slurry cylinder tube 6, a hydraulic cylinder tube 7 arranged in series with the slurry cylinder tube 6, a slurry piston 9 provided in the slurry cylinder tube 6, and A slurry suction / discharge unit 2 including a hydraulic piston 10 provided in a hydraulic cylinder cylinder 7 and a rod 11 connecting the slurry piston 9 and the hydraulic piston 10 can be rotated about one axis P. Base 1
The base 1 is provided with a fixed portion 5 having a pair of slurry suction holes 3, 3 and a pair of slurry discharge holes 4, 4, and the two pairs of slurry suction and discharge portions 2,.
The opening 17 of each pair of slurry cylinder cylinders 6 is alternately communicated with the above-mentioned slurry suction holes 3, 3 and the slurry discharge holes 4, 4 by rotating the slurry intermittently every °, and each pair of slurry cylinders 6 A slurry pumping pump characterized in that the suction / discharge operation of the suction / discharge units 2 is alternately switched. A first sliding contact plate having a slurry suction hole and a slurry discharge hole provided in the fixed portion, and a communication hole capable of communicating with the slurry suction hole and the slurry discharge hole.
The second sliding contact plate 15 having 18 ...
Is fixed to the opening end of the second sliding contact plate with respect to the first sliding contact plate 12.
A sliding rotation of the sliding member (15) so that the openings (17) of the respective slurry cylinder cylinders (6) are hermetically connected to the slurry suction holes (3) and the slurry discharge holes (4) through the communication holes (18). 2. The slurry pump according to 2.