JPS59211774A - Change-over device for intake and supply-out part of concrete pump - Google Patents

Abstract

PURPOSE:To provide ease with which a valve mechanism is taken out and mounted on an equipment by forming a pair of left and right housing chambers between front and rear plates and inserting each valve mechanism into each of the housing chambers from its side opening. CONSTITUTION:An approximately I-shaped projection 28 is raised on either a rear plate 19 or a front plate 18. Both the plates 18 and 19 are firmly joined with each other via the projection 28 which is on the rear plate 19, for example, whereby forming a pair of housing chambers 29 and 30. Valve mechanisms 13 and 14 are inserted in the housing chambers 29 and 30 for housing from the side openings 31 and 32, respectively. After the housing, the side openings 31 and 32 are closed by pressing plates 36 and 37. The pressing plate 36 is retracted, the bolts thereon are loosened and both closing plates are pulled away in the upward and downward directions along a valve stem 50, permitting the valve mechanism 13 to be pulled sideway from the side opening 31.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a switching device for a suction section in a concrete pump, and particularly to a hopper and a hopper having a pair of left and right outlets that can communicate with a pair of left and right pump cylinders and both bong cylinders. A pair of valve mechanisms are interposed between the Y-shaped pipes having a single discharge port capable of communicating with both the pump cylinders, and are capable of switching the communication state of the two pump cylinders, the hopper, and the Y-shaped pipe. This invention relates to a switching device for a suction section in a concrete pump housed in a valve housing.

Conventionally, this divine switching device accommodates a pair of valve mechanisms.
The valve housing is a rectangular circle y with both ends open,
1. The hopper and Y-shaped pipe are connected to the end plates of the yrM 4ti, so when maintaining or replacing the valve mechanism in the valve housing, the connection state with the hopper and y*w is Remove the end plate from the rectangular body.
7 had to be removed, making maintenance or replacement work of the 9F mechanism troublesome and complicated.

The present invention overcomes such conventional drawbacks and allows for the removal and installation of the valve mechanism within the nozzle valve bousing. ”
The purpose of the present invention is to provide a switching device for a suction section of a concrete pump that greatly facilitates maintenance and replacement of the valve mechanism and improves work efficiency.

Hereinafter, we will briefly explain the features of the present invention with reference to the drawings. First, in FIG. 1, a pump body 1 of a concrete pump has a pair of left and right pump cylinders 2.3,
A switching device 6 is interposed between these pump cylinders 2.3 and the hopper 4 and Y-tube 5 common to both pump cylinders 2.3.

The hopper 4 is provided with a pair of outflow lowers 1-1 on the left and right corresponding to both the pump cylinders 2 and 3, and the 7-figure heavy 5 has a single discharge port that can be easily flowed slowly to both the pump cylinders 2 and 3. 9 is provided.

9 Sakaki device 6 includes a single valve housing 10 and left and right sides.
- A pair of left and right valve mechanisms 13.1 as described later are provided in the valve housing 10.
4 (see Figure 4) is accommodated. Picture sucking paper” 1,1
2 is a suction VfllS15 that can communicate with the hopper 4, and Y
The discharge pipe section 16 that can communicate with the
1S 15 + 16 are commonly connected to the pump cylinder 2. -3, and a common bone portion 17 that communicates with each other.
Valve housing 10 (・Double suction I mountain '11.11
It is interposed between the J suction section 15 and the discharge pipe section 16 (none), as well as the hopper 4 and the Y-shaped pipe 5.

This switching device 6 operates when a pump cylinder (not shown) in one pump cylinder 2 performs a discharge operation.
The suction pipe section 15'6 of one suction pipe 11 and the outflow lower of the hopper 4 are closed off, and the discharge pipe section 1 of the suction pipe 111 and the Y-shaped pipe 5 are communicated with each other. When the pump piston performs suction operation,
<(! 1 b and the outflow lower of the hopper 4 are connected, and the discharge pipe section 16 connected to the suction feed 11 and between the figure 7 11 and 5 are closed off.Also, regarding the other pump cylinder 3 , same as in the case of pump cylinder 2 described above 4
*D. The switching device 6 performs a switching operation.

In FIGS. 2, 3, and 4, the wrap housing 10 has a front plate 18 and a rear plate 19 facing each other,
It is solidified. The front plate 18 has a pair of openings 20.
．． 21:22.23 are bored on both the left and right sides of the hole, and the hopper 48 and the Y-shaped sound 5 are connected. Upper opening 20.
22 individually communicate with the outflow lower 8 of the hopper 4, and the lower openings l5521°23 communicate with the Y-shaped pipes 5, respectively.

In addition, the rear plate 19 has a pair of upper and lower openings 24, 25;
゜27 or both left and right sides, suction '111.12
are connected accordingly. Upper openings 24, 26i/(
1, the ridged pipe portions 15 of both suction Iα11 and 12 communicate with each other, and the lower opening 25.27 has both suction Iα11.1.
The two discharge pipe portions 16 communicate with each other.

One of the front plate 16 and the rear plate 19, for example, the rear plate 19, is provided with a substantially 1-shaped protrusion 28, and the front +1i1B and the rear plate 19 are made to intersect with each other via this protrusion 2B. By putting the inner box together, the front plate 1B and the rear cover 19
A pair of storage chambers 29 and 30 are formed on the left and right sides of the storage chamber 29 and 30, which are partitioned from each other by the projections 28. Also, side openings 31 and 32 are respectively formed between the 18 and the extractor 19 in the 1iJ4 so that the inner and outer sides of the chambers 29 and 30, which are opposite to each other, are opened.

5 and 6, the upper and lower parallel parts 33.34 of the projection 28P have a length tl from the central partition part 35 connecting both parallel parts 33.34 to the front spar 1B and the rear. It is set to be shorter than the cutout tl from the partition part 35 of the plate 19, and the difference between the lengths tl and tl of the plate 19 is determined by the length tl of the plate 19. 40.
The size of the chest is determined to be large enough to accommodate each of the 41.

The inner surfaces of the front plate 18 and the rear plate '19 are sloped so that they approach each other as they approach the partition 35, so that the compartments 29.30 become closer together as they approach the partition opening 31.32. Expand 1-. Benden+413°14 is accommodated in these accommodation ￥29+30 from the side openings 31.32, and after being accommodated, the llj part opening 1 31.32 is connected to the protrusion 2B with both P and horizontal 13°14.
Published in the partition section 35 of
IA'i in
be done. These pressing plates 36, 37, the ends of the descending portions 33, 34 of the protrusion 28, the front plate 18, and the rear samurai 19, make one of the accommodation chambers 29 -1 =3 concentric holes 44 and 45 are defined, and the other accommodation chamber 30
In contrast, a pair of concentric through holes 46°4r are formed.

7121 and O- In FIG. 8, one valve mechanism 13
A casing 48 that can accommodate IJJ, a valve body 49 that can slide freely within the goose song 48, a 9r rod 50 on which the valve 144J is fixed and extends vertically, and a valve stem. A pair of 1/38゜3 supports that support 50 movably in the direction of the force.
9 and a pair of closing members s1.52 that close both upper and lower ends of the casing 48.

The goose song 48 basically has a flat shape, and an inclined surface 53 +'54 is formed on the outside of the image corresponding to F'f'J+, ii8 and the inner surface of the fitting plate 19. This casing 48 has a circular part 5 that is perpendicular to the direction of the pitcher.
5 and a rectangular portion 56 are provided. Also, the inclined surface 53.51 corresponds to the opening 20.21 of the front plate 18.
59, valve holes δU and 61 are respectively drilled corresponding to the 1liLJ product 24°25 of the rear plate 19. Furthermore, the two corners on the elongated N and +μ36 sides of the casing 46 have +! Notches b2+63 are provided for loading the III receivers 3f5 and 39, respectively.

The valve body 49 slides on the rectangular part 56 of the sliding hole 57'-/'g
The flat 4hL m 64 and the circular part 65 that can slide on the circular part 55 are integrally formed, and the cylindrical part 6b
+: Two valve rods 50 are inserted and fixed in the middle. Moreover, the flat portion 64 is connected to one valve hole 59. When the bl is completely occluded, the other valve hole b8 * b (J is completely closed by 1, 1
The area is set so that one can be released.

The closed base member 51 has a rectangle)1βjNl+ in the sliding hole 57
The insertion temporary 66 that is inserted into the hole of 56 is the Kusidogu 4.
8 and the parallel part 33 of the protrusion 28.
The return of i66 is formed in an arc shape corresponding to the edge of the valve body 49. The other closing member 52 is formed symmetrically with the closing member 51 with respect to a half plane perpendicular to the axis of the valve stem 50.

Both ends of the valve stem 50 protruding from the casing 48 are located in the notches b2. of the casing 48. Spider l'238 fitted to a3
Supported by +39. Moreover, the length of the valve stem 50 and the predetermined position of the valve body 49 are such that both sides of the valve stem 50 are always supported by the bearings 38, regardless of the reciprocating movement of the valve stem 50 and the valve body 49 in the axial direction. It is set to the extent that

The other valve cypress 14 is r
The number is symmetrically approximated as 13 for i+f.

Both valves tFm13 and 14 are inserted into the housing chambers 2J and 30 through the openings 31 and 32 of the valve housing 1u, and then pressed and fastened to the front plate 18 and the extraction root 19 with bolts 42 and 43. By closing the side openings 31 and 32, the bulb is housed in the bulbous pufferfish 10. This h double valve j) M 4' (413, 1417) bearing 3a, 39.41J, 41 has through holes 44, 45, 46
．． Located in the 47th circle '6 a those through holes 44,
45.46.47 is the protrusion 28 and the pressing plate 36.37
Closing plates 72-1 are fastened by bolts 68-71 to
5, thereby bearing 3B, 39.40
, 41 from falling off from the valve housing 10.

In addition, insertion holes 77 to 80 for the valve stems 50 and 76 are protruded from each of the blocking plates 72 to 75, respectively, and from these insertion holes 77 to 80, square 'A' 50 + 7 b 'J I
TI ends each arrow.

The upper ends of the valve rods 50.76σ in both valve mechanisms 13.14 are connected to the valley piston 83.84 of the hydraulic cylinder a1.82, and both the hydraulic cylinders 8i, g2+, AtJ plate 1B and the number plate 1j Support stand 851 fixed to
Supported by i.

Next, to explain this operation, when pumping concrete 1, the pump pistons are alternately driven in the left and right pump cylinders 2.3, and at the same time both hydraulic cylinders 81 d2 is alternately extended and moved by Mr+t)A. As a result, in one valve mechanism 13 corresponding to one pump cylinder 2 which has not been extended and driven, the valve body 49 opens the upper valve hole b8.
・Opens the valve hole 59+t;1 of the toca, and the concrete from the pump cylinder 2 is discharged from the discharge port 9 of the Y-shaped eyebrow 5. In addition, in the other valve Isogatsu 14 corresponding to the other pump cylinder 3 which is driven by zero, the valve hole connected to the pump cylinder 3 and the Y-shaped sound 5 is closed, and the outlet port 8 of the hopper 4 is closed. The corresponding valve hole is opened and the concrete in the hopper 4 is sucked into the pump 79723. On the contrary, one pump cylinder 2 is contracted and driven, and the other pump cylinder 3 is
When driven R, both valve mechanisms 13.141'! , which operate in the opposite manner to that described above, and which are repeated alternately so that concrete is alternately delivered from both pump cylinders 2.3.

Next, assuming that one of the valve mechanisms 13 is to be removed from the valve housing 1u, first loosen the pin 1-42f and remove the pressing plate 36 from the front plate 18 and I&4 1j or C1. At this time, the front plate 18 and the front plate 18 are fixed to each other via the hinges 28 to maintain the integration.

By removing the pressing plate 36, 1161 part-port 31
7 due to the fact that it is opened. Therefore, Pol) 68.69
Loosen and pull out the inner blocking plates 72, 73 in the vertical direction along the square 50, and remove the connection between the valve rod 50 and the piston rod 83).
Pull it out with force. This maintains the connection state between the 7-shaped tube 5, the hopper 4, and the valve housing 10! The valve mechanism 13 can be removed extremely easily.

When housing the valve mechanism 14 in the housing chamber 29, it is sufficient to perform the operation opposite to that described above.
The valve mechanism 13 can be housed in the housings 6 to 29 up to 1 while maintaining the connection state between the hopper 4 and the 7-shaped pipe 5 and the valve housing 10.

The other valve mechanism 14 can be removed and installed in exactly the same manner as the valve mechanism 13 described above.

As described above, according to the present invention, the valve housing has a front valve having a pair of upper and lower openings on the left and right sides that communicate with the outlet of the hopper and the 7-shaped pipe, and a pair of upper and lower openings that communicate with the pump cylinder. The rear plate has a rear plate on the left and right sides, and the front plate and the rear plate are connected to each other via a roughly I-shaped protrusion that is not provided on either side. Inner and outer i′A:] Kanko 1;:.

A pair of containment chambers on the left and right are formed, and the famous lawyer ('rl)
can be stored in the drawing chamber from its I11 opening;
i: VC in the cushioning having one hole at the front and rear in pairs at the top and bottom corresponding to the above-mentioned upper and lower openings;
The side openings of the partitioned chambers housing these valve mechanisms are arranged in the front plate and the rear plate VC openings. Fixed and cut i[:
They are each closed by a pair of pushers '+Ji that push the casing inward. Therefore, while maintaining the connection between the valve nose and the hopper and Y-shaped 1,
By removing the pressing plate, it is possible to remove the valve mechanism from the side or insert it into the housing from the side, making maintenance and access work of the valve much easier. Moreover, the space for removal and insertion only needs to be maintained at the ii, li, and hb4 of the valve housing, and there is no need to secure that space in the front, rear, top, and bottom.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention ν1], in which FIG. 1 is a general view from 111j, FIG. 2 is a front view seen from n-xH in FIG. 1, and FIG. 3 is from l1l- in FIG. 1. 4 is a cross-sectional view taken along the line ■-IV in Figure 1, Figure 5 is a cross-sectional view taken along the v-v line in Figure 4, and Figure 6 is an exploded view of the valve housing with the front plate omitted. 7 is a vertical sectional view of the valve mechanism,
FIG. 8 is a partial perspective view of the valve mechanism. 2.3...Pump cylinder, 4...Hopper, 5...
・7-character head, 6... Kiriki device, 7.8... Outlet, 9
...Discharge port, 10...Valve housing, 13.1
4...Valve mechanism, 18...IJ・1叡, 19...Rear plate, -〇～27...-mouth sound b1 28...Protrusion,
29.30 ...accommodation≧≦, '31. 32... Side opening, 36.37... Pressing plate, 48.
...Casing, 49.=Valve body, 50, 76-=Valve body, 573°61...Valve hole. Patent applicant: Kyokuto Kaihatsu Kogyo Co., Ltd.

Claims (1)

[Claims] Pair of left and right pump cylinders, can communicate with both pump cylinders.
) A valve is installed between the Y-shaped pipe having a single discharge port that can communicate with the pump cylinder in the υ hole, and the two bonno cylinders,
-J6ff for a concrete pump comprising a pair of valve mechanisms capable of switching the communication state of a hopper and a Y-shaped pipe housed in a single valve nozzle; A front plate having a pair of upper and lower openings on the left and right sides that communicate with the outlet and the Y-shaped pipe '1' and a rear mount that has a pair of upper and lower openings on the left and right that communicate with the pump cylinder are connected to the front plate ■6. They are connected to each other by facing each other through approximately I-shaped protrusions protruding from either one of the rear plates, and the front and rear plates have a pair of left and right panels that open medially and laterally. A housing chamber is formed, and each of the valve mechanisms can be accommodated in both housing chambers from the side openings thereof, and has a pair of valve holes located below the upper and lower openings corresponding to the upper and lower openings, respectively. The valve bodies that alternately close and close the valve holes are housed in the casing, and the side opening of the six-hole storage chamber that accommodates these valve mechanisms can be attached to and removed from the front and rear plates. 1. A switching device for a suction section in a concrete pump, characterized in that the switching device for a suction section in a concrete pump is closed by a pair of pressing plates that are fixedly fixed to each other and that press the casing inward.