JPS6165968A - concrete valve - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rotary set cutting valve used in a pumping line for conveying concrete or the like.

[Conventional technology]

Conventionally, there are rotary pulps as shown in Figures 1 to 4 to 6 used in pressure conveyance lines for concrete, etc.
The rotor R in this case is: 1lii 4M A conical hole is provided perpendicularly to the eccentric position of a cylinder with a shaft, and the end on the eccentric side is cut out.

[Four points while the invention is trying to solve the problem]

Generally, the rotor side is the wear side, but each time the
- The shaded area X of the rotor R shown in Figure 6 is completely worn out due to concrete build-up and biting of fine particles and pieces of material, so either remove it from time to time and repair the worn area by build-up welding, or use High 1+i! The entire rotor was replaced.

However, overlay welding, in particular, tends to cause distortion due to unevenness, which poses a problem in terms of accuracy, and it also has the disadvantage that replacing the entire rotor is expensive.

[Means for solving problems]

The inner end shape of the passage of the casing and the shape of the passage of the valve rotor are approximately rectangular, and one corner that becomes the apex of the passage is made fy[by a removable tip.

[For use]

When the pulp is changed by rotation of the rotor, the concrete inside the pulp is cut by the rotor side passage, but since the passage is rectangular in shape, the concrete is squeezed into a gradually decreasing square shape by the rotor and the casing. Therefore, the wear is concentrated on the corner, which is the top of the line, and the edges in the middle do not wear much.

Since replacement tips are provided at the locations where wear is concentrated, the valve rotor can be repaired to its original state simply by replacing the tips at a timely manner.

[Example of 1 actual package] In the figure, 1 is the pulp casing, and the hopper side opening I
11 and passage 1b, concrete cylinder side opening 1c and passage 1d, discharge +! II four-port IC and Jm path 1f are formed on three sides in a 1f T-shape. 2 is a valve rotor with a circular outer circumference of tm. The sunken shafts are rotatably supported on both sides by fittings 5 and 6 built into the lid fittings 3 and 4, respectively, 7 and 8 are packings, and 9 and 10 are It is a 0 ring.

The valve rotor 2 forms a passage 2a with a corner 1 in a direction orthogonal to a parallel axis eccentric from the axis, and one corner of the passage is cut out, and both sides on the side opposite to the cutout are the same on the inside. It is formed into a bow shape that bulges out.

Reference numeral 11 denotes a chip made of hard "r!i" material, which is cut into a stepped corner shape near the apex of the rectangular passage 211 of the rotor and inserted from both sides, and is detachably fixed with a bolt 12.

Further, the passages 1b, 1d-1f of the casing are circular at the open end, but as they go inward, they gradually change until they reach the outer circumferential welding surface 1g of the valve rotor 2, which coincides with the rotor passage 211. It is formed into a nearly square shape.

Therefore, the valve rotor 2 has a passage 1 as shown by the solid line in FIG.
In the state of communication between d and 1f and the passage 2a, or the communication of the passages 1b and 1d and the passage 2a shown by the two-dot chain line in the figure; in the operating state, the shape of the passage opening is the same as that of the passage 1b and 1d on the casing 1 side.
・1 out of 1f! ! IIJfI mouth shape, but due to the rotation of the rotor 2, the openings of both passages are overlapped with the cylinder side passage 1b (or if) as shown by the dashed-dotted line and the dashed-double line 2a'' shown in FIG. Yl Yl gradually decreases.Furthermore, since the shape of the overlapping part is a corner-shaped overlap, compared to the conventional arrangement of circular arc-shaped parts, the flowing concrete is concentrated at the point around the corner. Since the rotor 2 side of the convergence part is constructed with a tip 11 made of zero-repair material, it is not only difficult to wear out, but when it wears out, just replacing the tip 11 restores the rotor 2 to almost its original appearance. It is possible.

At this time, the tip ↓1 can be easily replaced within the hopper or from the opening 1e by simply disconnecting the outlet 1i (+1) without disassembling the entire pulp.

Incidentally, in the above-mentioned example, the casing l is not provided with a sleeve, but if a sleeve is inserted as in the conventional four-structure structure shown in FIG.
Even if one part is worn out, the sleeve can be easily returned to its original shape and size by replacing it.

Also, the shape of each passage 1b, 1d, 1f, and 2a may be a straight rectangular shape, and the stipple 1■! on the chip 11 side! If the 10 sides are arcuate, the concrete convergence at 14 o'clock is more effective by +t.

〔Effect of the invention〕

In the present invention, the shapes of the casing side and the rotor measurement path are approximately rectangular, and a removable chip is provided at the apex of the path, so that the rotor l! ! At 1IIIJ, the shape of the +di path m joint is extremely small and converged into a square shape, reducing wear on parts other than the tip, and the tip is thick (when it wears out, the tip can be replaced to restore the original shape). The passage condition is 1ait.

Furthermore, since tip replacement can be easily performed from the hopper side or from the opening by uncoupling the discharge side without disassembling the valve, maintenance costs and repairs can be reduced compared to conventional -4-component pulp. This allows time to be shortened.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an example of the present invention, Fig. 42 is a cross-sectional view taken along the line 11-[1 in Fig. 1, Fig. 3 is an explanation of the operation of the present invention, and Figs. 4 to 6 are This is a conventional example, and the fourth
The figure is an exploded perspective view of the main parts of the concrete valve, 4
5 is a perspective view of the rotor, and FIG. 6 is a cross-sectional view of the center of FIG. 5. In the figures, 1 is a casing, 2 is a valve rotor, and 11 is a chip.

Claims (2)

[Claims] (1) A valve rotor is fitted rotatably in a direction orthogonal to the intersection of these passages in a casing having passages and openings that communicate in three directions: the hopper side, the concrete cylinder side, and the discharge side. The passage of the casing gradually changes inward from the circular opening and is formed into a substantially rectangular shape until it reaches the contact surface of the outer circumference of the valve rotor, and the rotor is arranged perpendicular to a parallel axis eccentric from the axis. This concrete valve is characterized in that a substantially rectangular passage is formed, one corner of the passage is cut out, and one corner of the passage on the opposite side has a tip made of a hard material detachably attached from both sides. (2) The passage of the valve rotor is formed in an arcuate shape with sides on both sides of the chip bulging inward, and both sides of the corresponding passage on the casing side are similarly bulged inward. Concrete valve as described in section.