JP2000213457A - Ready-mixed concrete feeding pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain smooth press-feeding of concrete by improving changeover of suctioning and discharging it. SOLUTION: Through-holes 2a, 2b of a cylinder support disc 2 are communicated with a pair of rotatably attached concrete cylinders 15, 16, while through holes of an oscillation surface plate 29 are communicated with the through-holes 2a, 2b by means of a pair of oscillating hydraulic cylinders 22, 23. A suctioning aperture 30a is opened to a wall of a hopper 30 for charging ready-mixed concrete. A discharging aperture 34a on the same plane as the suctioning aperture 30a is opened to a fixed surface plate 34 on the outside of the hopper 30. The cylinder support disc 2 is rotated by the oscillating hydraulic cylinder devices 22, 23 so as to alternatively communicate it with the suctioning aperture 30a and the discharging aperture 34a. Suctioning and discharging of the ready-mixed concrete is alternatively switched for press-feeding concrete to a concrete feeding pipe. The oscillation surface plate 29 can be attached in an inverted manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ready-mixed concrete pump for continuously pumping ready-mixed concrete by causing a cylinder device to alternately suck and discharge the ready-mixed concrete.

[0002]

2. Description of the Related Art A pump for feeding fresh concrete by a piston system is a suction / discharge switching valve which is connected to a hopper for charging ready-mixed concrete from a mixer truck and an inlet pipe below the hopper to perform a suction / discharge operation of a concrete cylinder. , A pair of concrete cylinders fixed facing the valve box, concrete packings respectively inserted in the concrete cylinders, rods respectively connected to the concrete packings, and the rods And a pair of hydraulic cylinder devices for moving back and forth in the axial direction, and operating the suction / discharge switching valve to suck in the ready-mixed concrete in the other concrete cylinder while sucking the ready-mixed concrete in one concrete cylinder. By discharging, the ready-mixed concrete is continuously And it is configured to be able to pump the Nkurito pumping tube. In addition, in order to combine the ready-mixed concrete discharged from the pair of concrete cylinders into one pipe and send it to the concrete pumping pipe,
A Y-tube is detachably connected to the discharge port of the valve box. Such a device is often used as a mobile type or a mounting type mounted on a vehicle for various types of construction, civil engineering and other works.

[0003] As described above, the ready-mixed concrete pump is capable of continuous pumping by alternately sucking and discharging a pair of concrete cylinders. The discharge switching portion, that is, the structure of the suction / discharge switching valve. The system of the suction / discharge switching valve is a gate valve type by the vertical movement or horizontal movement of the plate valve, a flapper valve type by the rotational movement of the plate valve, a hemispherical valve type by the rotational movement of the hemispherical valve, and a lateral movement by the box type valve. A rectangular slide valve type is known.

[0004]

However, none of the conventional suction / discharge switching valves satisfies all of the inhalability and dischargeability of fresh concrete and the ease of closing and maintenance, such as maintenance, inspection and cleaning. Therefore, all of them have inferior problems, and at present, they have not yet met various requirements required for a fresh concrete pump. In addition, the conventional suction / discharge switching valve has a complicated structure and requires two drive units for opening and closing the valve, resulting in high cost.

Accordingly, the present invention highly satisfies various items required for a switch section between ready-mixed concrete suction and discharge.
Provided is a ready-mixed concrete pump that is simple in structure, inexpensive, and easy to maintain.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a pair of concrete cylinders rotatably mounted by a pair of rocking hydraulic cylinder devices.
A cylinder support disk having a through hole communicating with the pair of concrete cylinders, and a swinging face plate having a through hole communicating with the through hole of the cylinder support disk are each mounted rotatably about a rotation axis. A suction opening is formed in the wall of the hopper into which the concrete is to be charged, and a discharge opening is formed in the fixed face plate disposed outside the hopper on the same plane as the suction opening, and a hydraulic cylinder for swinging is provided. The suction and discharge of the ready-mixed concrete are alternately performed by rotating the cylinder support disk so as to alternately communicate with the opening for suction and the opening for discharge by the device, and the ready-mixed concrete is removed from a pair of concrete cylinders. Provided is a ready-mixed concrete pump for directly pumping to a concrete pumping tube.

The suction opening is formed in a pair substantially adjacent to each other, and the discharge opening is provided at a lower portion and an intermediate portion thereof at a predetermined radius centered on the rotation center of the cylinder supporting disk. Are provided on the circumference of a circle.

According to this configuration, when the ready-mixed concrete put into the hopper is sucked, the swinging face plate is turned to move one concrete cylinder into the suction opening and the other concrete cylinder into the discharge opening. The concrete packing of one of the concrete cylinders is pulled by a hydraulic cylinder device in a state where the concrete packings are communicated with each other, and the ready-mixed concrete is sucked.

When discharging the inhaled ready-mixed concrete, the rocking face plate is rotated so that one concrete cylinder communicates with the discharge opening and the other concrete cylinder communicates with the suction opening. Press the concrete packing of the concrete cylinder with a hydraulic cylinder device to discharge ready-mixed concrete.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in an exploded perspective view of FIG. 1, a bearing portion 4 (see FIG. 2) is attached to a shaft 3 in which a substantially fan-shaped pressure plate 1 is connected at one end and a cylinder supporting disk 2 is connected at the other end at right angles. , The bearing portion 4 is connected to the mounting plate 5, and a casing 6 for supporting the later-described swing hydraulic cylinders 22, 23 is set up on one of the mounting plates 5 near the cylinder supporting disk 2. . Both ends of the mounting plate 5 and the casing 6 are mounted on the side frame 7a of the base 7 and are connected appropriately. The casing 6 is located behind the gate 8 erected on the front side of the base 7. The base 7 has telescopic legs 9 such as outriggers. Therefore, the shaft 3 is rotatably supported by the base 7 via the bearing 4 fixed by the mounting plate 5.

Between the pressure-resistant plate 1 and the cylinder supporting disk 2, the hydraulic cylinder devices 10 and 11 for swinging and the concrete cylinder 1 connected to the hydraulic cylinder devices 10 and 11 for swinging are provided.
5 and 16 are provided. That is, as shown in FIGS. 2 and 3, the tail ends of a pair of rocking hydraulic cylinder devices 10 and 11 are fixed to the pressure-resistant plate 1 at the periphery of the arc portion, respectively. A concrete packing 14 is connected to the distal ends of the operating rods 12 and 13 which can move forward and backward respectively, and the concrete packing 14 is connected to a pair of concrete cylinders (tubes) 15 and 15.
16 and the concrete cylinder 1
It is possible to advance and retreat in the axial directions 5 and 16. The swing hydraulic cylinder devices 10 and 11 are connected to an appropriate hydraulic pressure generating device (not shown) via an appropriate pipe.

One end of each of the concrete cylinders 15 and 16 has a pair of through holes 2a and 2b formed in the cylinder support disk 2.
And the other end is exchangeably connected by a tie rod or the like to the substantially fan-shaped support block 17 inserted through the shaft 3. Therefore, the concrete cylinders 15, 16
Both ends are supported and fixed to the cylinder support disk 2 and the support block 17, and when the operating rods 12, 13 advance and retreat in the concrete cylinders 15, 16, both are firmly supported so as not to bend. Concrete cylinder 1
The operating rods 12 and 13 and the hydraulic cylinder devices 10 and 11 for swinging are all parallel to the shaft 3.

The distal ends of a pair of operating rods 18 and 19 are rotatably connected to the cylinder supporting disk 2 by shafts 20 and 21, and a pair of swing hydraulic pressures with which the operating rods 18 and 19 are engaged. The tail ends of the cylinders 22 and 23 are rotatably connected to the casing 6 by shafts 24 and 25. Shaft 21
Is disposed on the side of the through hole 2a, and the shaft 20 is disposed on the side of the through hole 2b, such that one is lower than the other. Therefore, by repeatedly supplying pressure oil to one of the swing hydraulic cylinders 22 and 23 in the extension direction and supplying pressure oil to the other in the contraction direction, the cylinder supporting disk 2 can reciprocate and rotate. It has become.

A gate 8 is provided in front of the cylinder supporting disk 2.
A cover plate 26 that covers the front surface of the cover plate 26 is provided, and a circular hole 26a is opened substantially in the center of the cover plate 26.
A seal ring 27 is orthogonally mounted on the back surface of the cover plate 26 so as to surround the circular hole 26a. The seal ring 27 rotatably fits and accommodates the cylinder supporting disk 2 and a swinging surface plate 29 of substantially the same diameter which is mounted in contact with the cylinder supporting disk 2 and is rotatably fitted therein. Is formed with a seal groove 27a. A seal member 28 is interposed between the cylinder support disk 2 and the seal groove 27a. Further, the seal member 28 may be interposed between the seal groove 27a and the outer peripheral portion of the oscillating face plate 29, or between the oscillating face plate 29 and the outer peripheral portions of both the cylinder supporting disk 2. . That is, the seal between the oscillating face plate 29 and the fixed face plate 34 is not the sliding surface between the oscillating face plate 29 and the fixed face plate 34, but the outer peripheral portion of the oscillating face plate 29, the outer peripheral portion of the cylinder support disk 2, or the oscillating face plate 29. It is characterized in that a seal member 28 is disposed on the outer peripheral portion of both the cylinder support disk 2 and the cylinder support disk 2.

The oscillating face plate 29 is fitted on the seal ring 27, and the shaft 3 is rotatably disposed through the center thereof.
The swing face plate 29 has a through hole 29a communicating with the through hole 2a of the cylinder support disk 2 and a through hole 2b of the cylinder support disk 2.
A through hole 29b communicating with the opening is provided. The remaining through holes 29c and 29d of the swing face plate 29 are spare through holes,
When the edges of the through holes 29a, 29b are worn by aggregates of ready-mixed concrete or the like, the position of the swinging face plate 29 can be shifted by 180 degrees. In addition, since the swing face plate 29 can be used by being inverted, the four through holes 29a to 29d can be used for a total of four cycles, and only the swing face plate 29 can be replaced.

A circular hole 26a is formed on the front side of the cover plate 26.
A hopper 30 that covers substantially half of is mounted and fixed. The hopper 30 has a suction opening 30a of the same shape communicating with the circular hole 26a of the cover plate 26 at a portion in contact with the hopper 30, as shown in FIG. It has round bottoms 31 and 32 arranged so as to surround 29a and 29c, and a through hole 2 is formed between the bottoms 31 and 32.
9b has a convex bottom part 33 located at the upper part.

The front face of the cover plate 26 is positioned such that the fixed face plate 34 contacts the swing face plate 29 at a position where the discharge opening 34a opened in the fixed face plate 34 communicates with the through hole 29b of the swing face plate 29. Is fixed via a support plate 35. Accordingly, in this state, the through hole 29a communicates with the suction opening 30a of the hopper 30, and the through hole 29b communicates with the discharge opening 34a. The fixed face plate 34 has a through hole 29.
b, and discharge openings 34a having substantially the same diameter, and concave portions 36, 3 contacting the edges of the concave bottom portions 31, 32 of the hopper 30.
7 is formed in a half-moon shape. Reference numeral 38 denotes a convex portion, which is formed between the concave portions 36 and 37. The support plate 35 has a half-moon-shaped circumferential recess 35a on which the half-moon-shaped circumferential bottom of the fixed face plate 34 is placed. The fixed face plate 34 is also the swing face plate 2
When the sliding surface with the surface 9 is worn, it can be reversed and used for two cycles, or only the fixed face plate 34 can be replaced.

A holding plate 39 having a hole 39a having the same diameter as the discharge opening 34a is connected to the front surface of the support plate 35. The holding plate 39 is a concave portion 3 of the fixed face plate 34.
The holding plate 39 and the fixed face plate 34 are joined together by bolts, having concave portions 40 and 42 corresponding to the convex portions 6 and 37 and a convex portion 41 corresponding to the convex bottom portion 33 of the hopper 30. I have. A discharge pipe 43 is connected to the hole 39a of the holding plate 39 so as to communicate with the discharge opening 34a.

The seal between the oscillating face plate 29 and the fixed face plate 34 is formed not in the sliding surface of the oscillating face plate 29 and the fixed face plate 34 but in the radial direction with respect to the rotation axis of the oscillating face plate 29, that is, the outer periphery of the oscillating face plate 29. The seal member 28 is arranged in the portion,
The suction opening 30a and the discharge opening 34a are located inside the seal member 28.

Next, the operation of the above embodiment will be described.
As shown in FIG. 5 (A), when the operating rod 18 of the swing hydraulic cylinder 22 is retracted and the operating rod 19 of the swing hydraulic cylinder 23 is extended, the cylinder support disk 2 (the swing The face plate 29) rotates counterclockwise. Therefore, concrete cylinder 1
5 and 16, the support block 17, the operating rods 12 and 13, and the hydraulic cylinder devices 10 and 11 for swinging are integrally rotated to the right as shown by the arrow, and the through holes 29b of the swing face plate 29 (the cylinder support disk 2). The through hole 2 b) is formed in the concave bottom 3 in the hopper 30.
1, and the through hole 29 a of the swinging face plate 29 (the through hole 2 a of the cylinder support disk 2) is located on the convex bottom 33 side and communicates with the discharge pipe 43. Then, while the fresh concrete 44 in the hopper 30 is sucked into the concrete cylinder 16 on the through hole 29b side, the fresh concrete 44 already sucked into the concrete cylinder 15 on the through hole 29a is pushed out by the concrete packing 14 and discharged. Is discharged into the discharge pipe 43 from the opening 34a.

Then, as shown in FIG. 5B, when the operating rod 18 of the oscillating hydraulic cylinder 22 is extended and the operating rod 19 of the oscillating hydraulic cylinder 23 is retracted, the cylinder support circle around the shaft 3 is obtained. Board 2
(Swinging face plate 29) rotates clockwise. Therefore,
The cylinder support disk 2, the support block 17, and the pressure-resistant plate 1 rotate the concrete cylinders 15, 16, the hydraulic cylinder units 10, 11, and the operating rods 12, 13 to the left as shown in FIG. 29 through holes 29a
(The through-hole 2a of the cylinder supporting disk 2) enters the concave bottom 32 side in the hopper 30, and the through-hole 29b of the swinging face plate 29 (the through-hole 2b of the cylinder supporting disk 2) is located on the convex bottom 33 side. As a result, the arrangement communicates with the discharge opening 34a and the discharge pipe 43. Therefore, the concrete cylinder 15 on the side of the through hole 29a
While the fresh concrete 44 in the hopper 30 is sucked, the fresh concrete 44 already sucked into the concrete cylinder 16 on the side of the through hole 29b is pushed out by the concrete packing 14 and discharged from the discharge opening 34a through the discharge pipe 43. And discharge it inside.

By repeating the above operation, the discharge opening 34
The ready-mixed concrete 44 can be discharged to the discharge pipe 43 continuously from a.

In order to smoothly feed the ready-mixed concrete, dewatering due to leakage to the outside or suction of air is inevitable. During operation, the swing face plate 29 and the fixed face plate 34 slide, but since the object to be pumped includes various aggregates, wear is inevitable. When the ready-mixed concrete is discharged by the rocking hydraulic cylinder devices 10 and 11, a strong thrust is applied, so that a gap may be generated between the rocking face plate 29 and the fixed face plate 34.

For this reason, sluggish leakage and air suction occur. However, in the past, sealing was attempted on the sliding surface between the swinging face plate 29 and the fixed face plate 34, but good results were not obtained. Was. However, in the present invention, this problem has been solved by sealing the shaft 3 in the radial direction, that is, in the outer periphery of the swing face plate 29, instead of the sliding face. Therefore, even if leakage occurs in the hopper, it does not affect the pressure feeding because it is inside the hopper.

[0025]

According to the present invention described above, a pair of concrete cylinders rotatably mounted within approximately 90 degrees by a pair of rocking hydraulic cylinder devices are reciprocated right and left of a cylinder supporting disk. By switching between the suction and discharge of the ready-mixed concrete, the concrete cylinder that has sucked the ready-mixed concrete pivots downward, enabling physically reasonable and reasonable operation. Therefore, the rotation angle can be reduced to 90 degrees or less and the time loss can be reduced, so that the pulsation at the time of switching can be reduced.

Therefore, since the switching operation can be performed as a line instead of the conventional surface, the switching is reliable and smooth, and no switching failure due to the biting of the aggregate occurs. In addition, the conventional valve box is not required, the height of the hopper can be reduced, the receiving of the chute of the ready-mixed concrete car can be improved, and the structure is simplified, so that the maintenance is easy and the running cost is low. Becomes

Further, by interposing the oscillating face plate between the cylinder supporting disc and the fixed face plate, it is possible to prevent the through holes of the cylinder supporting disc from being worn out primarily by the fixed face plate and the oscillating face plate. There is an advantage that the through-hole is prevented and the swinging face plate can be reused by rotating or reversing, thereby improving durability.

Further, since four through-holes are formed in the swinging face plate corresponding to the suction opening and the discharge opening, when the through-holes are worn out, they are rotated about the shaft. By changing the position of the other unused holes and / or reversing the contact surface with the cylinder support disk, a total of 4
Cycles can be used and only the swinging faceplate can be replaced. Further, since the fixed face plate which is in contact with the swinging face plate is fitted and fixed to the support plate, there is an advantage that the through-hole of the fixed face plate which is easily worn can be reused by inverting the fixed face plate.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of one embodiment of the present invention.

FIG. 2 is a partial sectional side view.

FIG. 3 is a partial cross-sectional side view when operating from the state of FIG. 2;

FIG. 4 is a front view.

FIGS. 5 (A) and 5 (B) are action explanatory diagrams.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure-resistant plate 2 ... Cylinder support disk 3 ... Shaft 4 ... Bearing part 5 ... Mounting plate 6 ... Casing 7 ... Base 10, 11 ... Oscillating hydraulic cylinder device 12, 13 ... Operating rod 14 ... Concrete packing 15, 16 ... Concrete cylinder 17 ... Support block 22,23 ... Hydraulic cylinder for swing 26 ... Cover plate 27 ... Seal ring 27a ... Seal groove 28 ... Seal member 29 ... Swing face plate 30 ... Hopper 30a ... Suction opening 31,32 ... Concave Bottom 33: Convex bottom 34: Fixed face plate 34a: Discharge opening 35: Support plate 43: Discharge pipe Reference number P3036

Claims (2)

[Claims] 1. A pair of concrete cylinders rotatably mounted by a pair of rocking hydraulic cylinder devices, a pair of concrete cylinders having a through hole communicating with the pair of concrete cylinders, and a through hole of the cylinder support disk. A swinging face plate having a through-hole communicating with the hole is rotatably attached around the rotation axis, and a suction opening is formed in a wall of a hopper for charging ready-mixed concrete, and is disposed outside the hopper. A discharge opening on the same plane as the suction opening is opened in the fixed face plate, and the cylinder supporting disk is rotated by a swing hydraulic cylinder device so as to alternately communicate with the suction opening and the discharge opening. The raw concrete is pumped directly from a pair of concrete cylinders to the concrete pumping pipe by alternately sucking and discharging the raw concrete. And a pump for feeding ready-mixed concrete. 2. The suction opening is formed in a pair substantially adjacent to each other, and the discharge opening is provided at a lower portion and an intermediate portion thereof at a predetermined radius centered on the rotation center of the cylinder supporting disk. 2. The arrangement of claim 1, wherein
The pump for pressurized ready-mixed concrete described.