JPH09112414A - Ready-mixed concrete force-feeding pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a force-feed pump smooth feed with reduced pulsation, make the construction simple to lower costs, and make maintenance easier in a ready-mixed concrete force-feeding pump. SOLUTION: In a ready-mixed concrete force-feeding pump for continuously feeding ready-mixed concrete under pressure by allowing a cylinder device to alternately suck and discharge ready-mixed concrete, a suction opening part is provided in the wall part of a hopper 30 into which ready-mixed concrete is fed. Further, a discharge opening part 34a is provided in a fixed face plate 34 arranged outside the hopper, and an oscillating face plate 29 which abuts on the suction opening part and the discharge opening part 34a to be rotated around a rotary shaft, is provided. Suction and discharge of ready-mixed concrete are switched by turning the oscillating face plate 29 so that through holes 29a, 29b formed in the oscillating face plate 29 so as to be connected to the concrete cylinder may be connected to the suction opening part 30a and the discharge opening part 34a.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A piston-type pump for pumping fresh concrete is a suction / discharge switching valve that is connected to a hopper for feeding fresh concrete from a mixer car and an introduction pipe below the hopper to perform suction / discharge operation of a concrete cylinder. Valve box, a pair of concrete cylinders fixed to face the valve box, concrete packings inserted in the concrete cylinders, rods respectively connected to the concrete packings, and the rods Consists of a pair of hydraulic cylinder devices that move the concrete forward and backward in the axial direction.While operating the suction / discharge switching valve to suck the fresh concrete in one concrete cylinder, By discharging it, fresh concrete can be continuously And it is configured to be able to pump the Nkurito pumping tube. In order to send fresh concrete discharged from each of the pair of concrete cylinders into a single pipe into a concrete pumping pipe,
A Y-shaped tube is detachably connected to the discharge port of the valve box. Further, such a device is often used as a mobile type or a mounting type mounted on a vehicle for various constructions and construction works such as civil engineering.

As described above, the ready-mixed concrete pump for pumping is capable of continuous pumping by alternate suction and discharge operations of a pair of concrete cylinders, but the biggest structural problem is suction and suction. The structure of the discharge switching portion, that is, the intake / discharge switching valve was used. The intake / discharge switching valve system is a gate valve type that moves the plate valve vertically or horizontally, a flapper valve type that rotates the plate valve, a hemispherical valve type that rotates the hemispherical valve, and a box type valve that moves left and right. A rectangular slide valve type is known.

[0004]

However, there is no conventional intake / discharge switching valve that satisfies all of the intake and discharge properties of fresh concrete, the blockability, and the maintainability such as maintenance, inspection and cleaning. Therefore, each of them has inferior problems, and it is the current situation that they have not yet fully met the various requirements required for the pump for ready-mixed concrete. In addition, the conventional intake / discharge switching valve has a complicated structure and requires two driving parts for opening and closing the valve, resulting in high cost.

Therefore, the present invention highly satisfies various matters required for the switching portion for sucking and discharging fresh concrete,
(EN) Provided is a pump for pumping fresh concrete which has a simple structure, is inexpensive, and is easy to maintain.

[0006]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a pump for pumping ready-mixed concrete for continuously pumping ready-mixed concrete by causing a cylinder device to alternately suck and discharge fresh concrete. At
A suction opening is opened in the wall of the hopper into which ready-mixed concrete is poured, and a discharge opening is opened in a fixed face plate arranged outside the hopper, and the suction opening and the discharge opening are brought into contact with each other. An oscillating face plate that is rotatable around a rotation axis is arranged, and the oscillating face plate is oscillated so that through holes communicating with a concrete cylinder are alternately communicated with the suction opening and the discharge opening. (EN) A structure for switching between suction and discharge of fresh concrete by rotating a face plate.

Further, a cylinder support circle having a suction face opening formed in a hopper supported on a base and a fixed face plate having a discharge opening formed on the base and a pair of through holes communicating with a concrete cylinder. A rocking face plate having a plate arranged therein and having a through hole communicating with the through hole of the cylinder supporting disc is attached to the cylinder supporting disc, and the cylinder supporting disc is rotated to form the rocking face plate. A configuration is provided in which through holes are alternately connected to the suction opening and the discharge opening to switch between suction and discharge of fresh concrete.

According to this structure, when sucking the fresh concrete thrown into the hopper, the rocking face plate is rotated so that one concrete cylinder is used as the suction opening and the other concrete cylinder is used as the discharge opening. The concrete packing of one of the concrete cylinders is pulled by a hydraulic cylinder device in a state of being communicated with the concrete cylinder, and fresh concrete is sucked.

When discharging the fresh concrete that has been sucked in, one of the concrete cylinders is rotated while the swinging 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 the hydraulic cylinder device to discharge the fresh concrete.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. As shown in the exploded perspective view of FIG. 1, a substantially fan-shaped pressure plate 1 is connected to one end of the shaft 3, and a cylinder support disc 2 is connected to the other end of the shaft 3 at right angles, and a bearing portion 4 (see FIG. 2). And the bearing portion 4 is connected to the mounting plate 5, and a casing 6 for supporting the rocking hydraulic cylinders 22 and 23, which will be described later, is erected on one of the mounting plates 5 near the cylinder support disk 2. . Both ends of the mounting plate 5 and the casing 6 are placed on the side frames 7a of the base 7 and are appropriately coupled. The casing 6 is located behind the gate 8 which is erected on the front side of the base 7. The base 7 has extendable legs 9 such as outriggers. Therefore, the shaft 3 is rotatably suspended via the bearing portion 4 fixed to the base 7 by the mounting plate 5.

Between the pressure plate 1 and the cylinder support disk 2, the hydraulic cylinders 10, 11 and the hydraulic cylinder devices 10, 11 are provided.
Concrete cylinders 15, 16 connected to the are provided. That is, as shown in FIGS. 2 and 3, the tail end portions of a pair of hydraulic cylinders 10 and 11 are fixed to the pressure plate 1 at the peripheral edges of the circular arc portions, and are engaged with the hydraulic cylinders 10 and 11 so that they can move back and forth. A concrete packing 14 is coupled to the tip ends of the working rods 12 and 13 to be fitted, and the concrete packing 14 is inserted into a pair of concrete cylinders (tubes) 15 and 16, respectively, and is moved in the axial direction of the concrete cylinders 15 and 16. It is possible to move forward and backward. The hydraulic cylinders 10 and 11 are suitable hydraulic pressure generators (not shown).
Are connected to each other via appropriate pipes.

One end of the concrete cylinders 15 and 16 has a pair of through holes 2a and 2b formed in the cylinder supporting disk 2.
, And the other end is exchangeably coupled to a substantially fan-shaped support block 17 inserted into the shaft 3 by a tie rod or the like. Therefore, the concrete cylinders 15 and 16 are
Both ends of the cylinder support disk 2 and the support block 17 are supported and fixed, and they are firmly supported so that the concrete rods 15 and 16 do not bend when the operating rods 12 and 13 advance and retract. Concrete cylinder 1
5, 16, operating rods 12, 13 and hydraulic cylinder 1
0 and 11 are all parallel to the shaft 3.

The tip ends of a pair of operating rods 18 and 19 are rotatably connected to the cylinder support disk 2 by shafts 20 and 21, and a pair of rocking hydraulic pressures with which the operating rods 18 and 19 engage. The tail ends of the cylinders 22 and 23 are rotatably connected to the casing 6 by shafts 24 and 25. Shaft 21
Is arranged on the side of the through hole 2a, and the shaft 20 is arranged on the side of the through hole 2b so that one of them is lower than the other. Therefore, the cylinder support disk 2 can be reciprocally rotated by supplying pressure oil to one of the swinging hydraulic cylinders 22 and 23 in the extension direction and supplying pressure oil to the other at the same time in the contraction direction. It is like this.

A gate 8 is provided on the front side of the cylinder supporting disk 2.
Is provided with a cover plate 26 for covering the front surface of the cover plate 26, and a circular hole 26a is formed in a substantially central portion of the cover plate 26.
A seal ring 27 is mounted orthogonally 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 which is mounted in contact with the cylinder supporting disk 2 and has substantially the same diameter. A seal groove 27a is formed in the. A seal member 28 is interposed in the seal groove 27 a between the cylinder support disc 2 and the seal member 28. 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 of the cylinder supporting discs 2. . That is, the seal between the oscillating face plate 29 and the fixed face plate 34 is not the sliding face of the oscillating face plate 29 and the fixed face plate 34, but the outer peripheral part of the oscillating face plate 29, the outer peripheral part of the cylinder supporting disc 2 or the oscillating face plate 29. It is characterized in that a seal member 28 is provided on both outer peripheral portions of the cylinder support disc 2 and the cylinder support disc 2.

The swing face plate 29 is fitted in the seal ring 27, and the shaft 3 is rotatably disposed so as to penetrate through the center thereof.
The rocking face plate 29 has a through hole 29a communicating with the through hole 2a of the cylinder supporting disk 2 and the through hole 2 of the cylinder supporting disk 2.
A through hole 29b communicating with b is opened. The remaining through holes 29c and 29d of the swing face plate 29 are preliminary through holes, and the position of the swing face plate 29 is set to 18 when the edge portions of the through holes 29a and 29b are worn by aggregate of the fresh concrete or the like.
It can be used by shifting it by 0 degree. Also,
Since the rocking face plate 29 can be used by reversing it,
A total of 4 cycles can be exchanged and used by the four through holes 29a to 29d, and only the rocking face plate 29 can be exchanged.

A hopper 30 is attached and fixed to the front side of the cover plate 26 so as to cover almost half of the hole 26a. As shown in FIG. 4, this hopper 30 has a suction opening 30a of the same shape that communicates with the hole 26a of the cover plate 26 in the portion in contact with the hopper 30, and the swing face plate 29 is provided at the lower bottom portion.
R-shaped concave bottom portion 3 arranged to surround the through holes 29a and 29c of
1 and 32, and the through hole 29b between the concave bottom portions 31 and 32.
Has a convex bottom portion 33 located on the upper part of the.

Then, at the 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, the front face of the cover plate 26 is brought into contact with the swing face plate 29 so that the fixed face plate 34 abuts. Is fixed via a support plate 35. Therefore, 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.
The discharge opening 34a having substantially the same diameter and communicating with b, and the recesses 36 and 3 that come into contact with the edges of the recessed bottoms 31 and 32 of the hopper 30.
It is formed in a half-moon shape with 7. 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. This fixed face plate 34 is also the swing face plate 2
When the sliding surface with 9 is worn, it can be reversed for two cycles and it is also possible to replace only the fixed face plate 34.

A pressing plate 39 having a hole 39a having the same diameter as the discharge opening 34a is joined to the front surface of the support plate 35. The holding plate 39 is the recess 3 of the fixed face plate 34.
6 and 37 and the concave portions 40 and 42 corresponding to the convex bottom portion 33 of the hopper 30, and the convex portion 41 corresponding to the convex bottom portion 33 of the hopper 30, are stacked on the support plate 35. There is. The 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 not the sliding surface of the oscillating face plate 29 and the fixed face plate 34, but 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. It means that the seal member 28 is arranged in the section,
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. 5A, when the operating rod 18 of the rocking hydraulic cylinder 22 is retracted and the operating rod 19 of the rocking hydraulic cylinder 23 is extended, the cylinder supporting disk 2 (the rocking motion) about the shaft 3 is moved. The face plate 29) rotates counterclockwise. Therefore, the concrete cylinder 1
5, 16, the support block 17, the operating rods 12, 13 and the hydraulic cylinders 10, 11 are integrally rotated to the right as shown by the arrow, and the through hole 29b of the rocking face plate 29 (the through hole 2b of the cylinder support disk 2 is formed. ) Enters the concave bottom 31 side of the hopper 30, and the through hole 29a of the rocking face plate 29 (the through hole 2a of the cylinder support disk 2) is located on the convex bottom 33 side and communicates with the discharge pipe 43. . Therefore, while the raw concrete 44 in the hopper 30 is sucked into the concrete cylinder 16 on the side of the through hole 29b, the concrete cylinder 15 on the side of the through hole 29a is sucked.
The already injected raw concrete 44 is pushed out by the concrete packing 14 and discharged into the discharge pipe 43 through the discharge opening 34a.

Then, as shown in FIG. 5B, when the operating rod 18 of the rocking hydraulic cylinder 22 is extended and the operating rod 19 of the rocking hydraulic cylinder 23 is retracted, the cylinder supporting circle is centered on the shaft 3. Board 2
(Swing face plate 29) rotates clockwise. Therefore,
The cylinder support disc 2, the support block 17, and the pressure plate 1 are concrete cylinders 15, 16, hydraulic cylinders 10,
11 and the operating rods 12 and 13 are integrally rotated to the left as shown by the arrow, and the through hole 29a of the rocking face plate 29 (the through hole 2a of the cylinder support disk 2) enters the concave bottom portion 32 side in the hopper 30. The through hole 29b of the rocking face plate 29 (the through hole 2b of the cylinder support disk 2) is located on the side of the convex bottom portion 33 and communicates with the discharge opening 34a and the discharge pipe 43. Therefore,
A hopper 3 is provided on the concrete cylinder 15 on the side of the through hole 29a.
While sucking the fresh concrete 44 in 0, the through hole 29b
The concrete cylinder 16 on the side of the concrete packing
And is discharged into the discharge pipe 43 through the discharge opening 34a.

By repeating the above operation, the discharge opening 34 is formed.
The fresh concrete 44 can be continuously discharged to the discharge pipe 43 from a.

In order to smoothly feed fresh concrete, it is forbidden to let it be dehydrated by leaking to the outside or sucking air. The swing face plate 29 and the fixed face plate 34 slide during the operation, but wear is unavoidable because the object to be pumped contains various aggregates. Hydraulic cylinder 1
Since a strong thrust is applied when the fresh concrete is discharged by 0 and 11, a gap may occur between the swing face plate 29 and the fixed face plate 34.

For this reason, some leakage and air intake occur, but in the past, it was tried to seal the sliding surface of the rocking face plate 29 and the fixed face plate 34, but no good result was obtained. It was However, in the present invention, this problem is solved by sealing not in the sliding surface but in the radial direction with respect to the shaft 3, that is, in the outer circumference of the rocking face plate 29. Therefore, even if a leak occurs, it does not affect the pressure feeding because it is in the hopper.

[0025]

According to the present invention described above, a pair of horizontally supported concrete cylinders are adapted to switch between suction and discharge of fresh concrete by reciprocal rotation of the cylinder supporting disk to the left and right. By rotating the concrete cylinder that has sucked in fresh concrete downward, it is possible to perform a rational operation that is physically consistent, and the rotation angle for switching can be made small, which reduces time loss, and therefore pulsation at the time of switching can also be reduced. .

Therefore, since the switching operation can be performed as a wire instead of the conventional surface, the switching is reliable and smooth, and the switching failure due to the biting of the aggregate or the like does not occur. In addition, the conventional valve box is not required, the height of the hopper can be lowered, the chute of the ready-mixed concrete vehicle can be received well, and the structure is simplified, so maintenance is easy and running costs are low. Becomes

Further, since the cylinder supporting disk forms one switching valve and becomes a part of the outer wall of the hopper, the concrete cylinder can directly and efficiently suck the fresh concrete from the hopper, and the air is mixed from the outside. Since there is no need for a conventional Y-shaped pipe or other introduction pipe, there is no bending, and since there is no introduction pipe, the cross-sectional area does not change, the flow path resistance can be reduced, and smooth pumping can be performed. Fewer areas will produce concrete deposits. In addition, when the concrete is sucked, the concrete cylinder and the suction opening opening in the wall of the hopper are aligned with each other, and the concrete cylinder and the discharge pipe are aligned with each other when the concrete is pressure-fed, so that smoother suction and pressure-feeding can be performed.

Further, since the oscillating face plate is provided with four through holes corresponding to the suction opening and the discharge opening, when the through holes are worn, the shaft is rotated about the shaft. By changing the position of the other through holes that are not used, or reversing the contact surface with the cylinder support disk, a total of 4
The cycle can be used, and only the swing face plate can be replaced. Further, the fixed face plate can be used by reversing the front and back, or it is possible to replace only 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 in the case of operating from the state of FIG.

FIG. 4 is a front view.

FIG. 5 (A) and FIG. 5 (B) are operation explanatory views.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure plate 2 ... Cylinder support disk 3 ... Shaft 4 ... Bearing 5 ... Mounting plate 6 ... Casing 7 ... Base 10,11 ... Hydraulic cylinder device 12, 13 ... Operating rod 14 ... Concrete packing 15, 16 ... Concrete cylinder 17 ... Support block 22, 23 ... Hydraulic cylinder device 26 ... Cover plate 27 ... Seal ring 27a ... Seal groove 28 ... Seal member 29 ... Oscillating face plate 30 ... Hopper 30a ... Suction opening 31, 32 ... Recessed bottom 33 ... Convex Bottom 34 ... Fixed face plate 34a ... Discharge opening 35, 39 ... Support plate 43 ... Discharge pipe

Claims (15)

[Claims] 1. In a fresh concrete pressure pump for continuously pumping fresh concrete by causing a cylinder device to alternately suck and discharge fresh concrete, a suction opening is provided in a wall portion of a hopper into which the fresh concrete is introduced. Is provided, and a switching valve for sucking and discharging fresh concrete is interposed in the suction opening, so that the fresh concrete is sucked directly from the hopper to the cylinder device without using an introduction pipe. Pump for pumping fresh concrete. 2. In a fresh concrete pressure pump for continuously pumping fresh concrete by causing a cylinder device to alternately suck and discharge fresh concrete, a suction opening is provided in a wall portion of a hopper into which the fresh concrete is introduced. By opening a part and interposing a switching valve for sucking and discharging fresh concrete in the suction opening, by sucking fresh concrete directly from the hopper into the cylinder device without using an introduction pipe, A pump for pumping fresh concrete, characterized in that air is not mixed in, the cross-sectional area does not change because an introduction pipe is not used, and flow resistance can be reduced. 3. A fresh concrete pressure pump for continuously pumping fresh concrete by causing a cylinder device to alternately suck and discharge the fresh concrete, and a suction opening is provided in a wall portion of a hopper for feeding the fresh concrete. Opening a discharge opening in the fixed face plate arranged outside the hopper, and arranging a swing face plate that is rotatable about the rotation axis by contacting the suction opening and the discharge opening. Then, the swaying face plate is rotated so that the through holes communicating with the concrete cylinder formed on the oscillating face plate are alternately communicated with the suction opening and the discharge opening, and the suction and discharge of the fresh concrete are performed. A pump for pumping ready-mixed concrete, which is characterized by switching between. 4. The ready-mixed concrete pumping according to claim 3, wherein the rocking face plate and the fixed face plate are sealed by arranging a seal member not on the sliding faces of the rocking face plate and the fixed face plate but on the outer peripheral portion of the rocking face plate. Pump. 5. A seal between the oscillating face plate and the fixed face plate is provided not on the sliding surface of the oscillating face plate and the fixed face plate, but on the outer peripheral portion of the cylinder supporting disc or both the outer peripheral portion of the oscillating face plate and the cylinder supporting disc. The pump for fresh concrete pressure-feeding according to claim 3, wherein a pump is provided with a seal member. 6. The sealing between the swing face plate and the fixed face plate is performed by arranging a seal member in a radial direction with respect to a rotating shaft of the swing face plate, not on a sliding surface of the swing face plate and the fixed face plate. Three
Pump for pumping fresh concrete as described. 7. The pump for pumping fresh concrete according to claim 4, 5 or 6, wherein the suction opening and the discharge opening are located inside the seal member. 8. The pump for pumping fresh concrete according to claim 3, 4, 5, 6 or 7, wherein the discharge opening is located below the suction opening. 9. A cylinder support circle in which a suction opening is formed in a hopper supported by a base, and a fixed face plate having a discharge opening in the base and a pair of through holes communicating with a concrete cylinder are formed. A rocking face plate having a plate arranged therein and having a through hole communicating with the through hole of the cylinder supporting disc is attached to the cylinder supporting disc, and the cylinder supporting disc is rotated to form the rocking face plate. A pump for pumping fresh concrete, characterized in that through holes are alternately connected to the suction opening and the discharge opening to switch between suction and discharge of fresh concrete. 10. A cylinder supporting disk integrally formed with a concrete cylinder connected to a through hole of the cylinder supporting disk and a hydraulic cylinder device connected to a concrete packing for sucking and discharging fresh concrete into the concrete cylinder. The pump for fresh concrete pressure-feeding according to claim 9, which is rotated in a vertical direction. 11. A rocking hydraulic cylinder is mounted on a base,
11. The pump for pumping fresh concrete according to claim 9 or 10, wherein an operating rod of the rocking hydraulic cylinder is connected to a cylinder supporting disk to rotate a rocking surface plate mounted on the cylinder supporting disk. 12. A rocking face plate mounted on a cylinder supporting disc has a plurality of through holes that can communicate with the suction opening and the discharge opening, and the rocking face plate and the cylinder supporting disc. 12. The pump for pumping ready-mixed concrete according to claim 9, 10 or 11, wherein said is rotatably supported inside a seal member fixed to a base. 13. The pump for pumping fresh concrete according to claim 12, wherein the rocking face plate has a preliminary through hole in advance. 14. A pump for pumping fresh concrete according to claim 9, 10, 11, 12 or 13, wherein a seal member is interposed on the outer peripheral portion of the rocking face plate. 15. A pump for pumping fresh concrete according to claim 9, 10, 11, 12, 13 or 14, wherein a discharge pipe is attached to the discharge opening.