JPH04116687U - Squeezable concrete pump - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the flattened pumping tube to be easily pulled out from the tube penetration port. [Configuration] Diameter D of tube penetration port 1a of casing 1
₂ should be at least 1.15 times the outer diameter D ₁ of the pumping tube 6. Seal flange 12 holding seal member 11
is removably attached to the position of the tube through hole 1a.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a concrete pump for discharging concrete toward the place where it will be poured. In particular, squeezing the pumping tube inserted into the casing with a roller The concrete is sucked in from one end of the pumping tube and discharged from the other end. This invention relates to a squeeze-type concrete pump that is designed to be able to move.

0002

[Conventional technology]

The squeeze-type concrete pump is formed into a cylindrical shape, as shown in Figure 3. Inside the casing 1, vertical rollers 2 are installed at multiple locations (two locations in the figure) on the outer periphery. A rotary body 3 is attached and supported, and the hydraulic motor 4 on the casing 1 moves the upper The rotating body 3 is configured to be rotated, and the rotating body 3 is arranged in the casing 1. A pad 5 having an arcuate surface centered on the axis O of the rolling body 3 on the inner surface is provided along the side wall, and a pumping tube whose intermediate portion 6a is arranged in an arc shape along the pad 5. Both ends of the casing 6 are made to protrude outside from the casing 1, and one end serves as the suction port 7. By using the other end as the discharge port 8 and rotating the rotary body 3, the roller 2 and The middle part 6a of the pumping tube 6 is squeezed from a circular shape to a flat shape between it and the pad 5. The concrete sucked in from the suction port 7 is discharged from the discharge port 8. (Special Publication No. 61-2792).

0003 In addition, in the above-mentioned squeezing type concrete pump, the concrete is squeezed flat by the roller 2. The middle part 6a of the pumping tube 6 is easily restored to a circular shape by vacuum pressure. In order to increase the intake efficiency, the suction of the pumping tube 6 is Tube penetration of the casing 1 through the mouth 7 part and the discharge port 8 part The diameter of the port 1a is made small, and a seal portion is provided at the tube through port 1a. The supporting member 9 holding the material 10 is attached, and the sealing member 10 seals the tube. The gap between the through hole 1a and the pumping tube 6 is sealed.

0004

[Problem that the idea aims to solve]

However, in the case of the squeeze type concrete pump mentioned above, the pumping tube 6 needs to be replaced as the cross-sectional shape gradually deforms into a flat shape with use. However, as mentioned above, the tube penetration port 1a of the casing 1 has a small diameter. For some reason, the work of pulling out the pumping tube 6 has been hindered. sand In other words, the conventional pumping tube 6 had a structure with nylon thread, so it was made flat. Even if the tube is penetrated, it can be easily deformed and restored to a circular shape at the tube penetration opening 1a, making it easy to pull out. Although there were no particular difficulties involved in the process, recently it has been improved in strength and durability. The pumping tube 6 containing steel wire is used to prevent flattening. If the tube is bent, it will be difficult to restore it to a circular shape, making it difficult to pull it out from the tube through hole 1a. This creates problems that make the work extremely difficult.

[0005] Therefore, with this invention, when replacing the pumping tube, the casing tube Make sure that the pumping tube can be easily pulled out from the tube through-hole. That is.

[0006]

[Means to solve the problem]

In order to solve the above problems, the present invention has developed a pump with an intermediate part placed inside the casing. Pass both ends of the pin tube through the tube penetration hole provided in the above casing to the outside. By protruding from the pump tube and squeezing the middle part of the pumping tube, suction is drawn from one end. Squeezable concrete in which the soldered concrete is discharged from the other end. In the pump, the diameter of the tube through hole is 1.15 of the outer diameter of the pumping tube. At least twice as long, and a pumping tube is installed at the tube penetration part of the casing. The seal flange that holds the seal member in contact with the outer peripheral surface of the The configuration is such that it can be attached as easily as possible.

[0007] In addition, the seal member has an internal hollow structure that allows air to enter and exit. It is best to make it complete.

[0008]

[Effect]

The diameter of the tube penetration port in the casing is at least 1.15 times the outer diameter of the pumping tube. By removing the seal flange, the pumping tube can be flattened. You will be able to pull out the tube easily.

[0009] In addition, if the seal member has an internal hollow structure that allows air to enter and exit, the air The seal ring can be pressed against the outer circumferential surface of the pumping tube by filling it with Therefore, the tube through-hole can be sealed more reliably.

0010

【Example】

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an embodiment of the present invention, in which the suction port 7 portion and the discharge port portion of the pumping tube 6 having the intermediate portion 6a inserted into the casing 1 are similar to the squeeze type concrete pump shown in FIG. In the configuration in which the outlet 8 portion is made to protrude outside the casing 1 through the tube through-hole 1a, the diameter _D2 of the tube through-hole 1a of the casing 1 is 1.15 times or more the outer diameter D1 of the pumping tube ₆ , Preferably, the diameter is 1.15 to 1.5 times (1.15D ₁ ≦D ₂ ≦1.5 D ₁ ), and the flange portion 1b formed at a position surrounding the tube through hole 1a is brought into contact with the outer peripheral surface of the pumping tube 6. A seal flange 12 provided with a seal member 11 is detachably attached with bolts 13. Note that 12a indicates a tube steadying portion extending from the seal flange 12 toward the inside of the casing 1.

0012 With the above configuration, the seal member 11 supported by the seal flange 12 Therefore, the outer periphery of the suction port 7 portion and the discharge port 8 portion of the pumping tube 6 is sealed. The internal and external pressures of the casing 1 can be maintained respectively. In addition, vibrations generated in the pumping tube 6 due to operation are caused by the seal flange 12 and This can be suppressed by the integral steady rest part 12a.

When it becomes necessary to replace the pumping tube 6, the seal flanges 12 at the suction port 7 portion and the discharge port 8 portion are separated from the casing 1 by removing the bolts 13, and the seal flanges 12 are removed from the casing 1 for pumping. It is pulled out from the tube 6, and then the pumping tube 6 is pulled out in one direction. At this time, although the pumping tube 6 is flattened, since the diameter _D2 of the tube through-hole 1a is 1.15 to 1.5 times the outer diameter _D1 of the pumping tube 6, it can be easily pulled out.

In the above, the diameter D ₂ of the tube through-hole 1 a of the casing 1 is set to 1.15 to 1.5 times the outer diameter D ₁ of the pumping tube 6 for the following reason. In other words, the test results confirmed that, in general, when the pumping tube 6 is flattened through use, the length of the flat cross section in the long axis direction is about 12 to 13% larger than the state before flattening. This is because it was done. Recently, in order to improve the durability of the pumping tube 6, it has been considered to make the intermediate portion 6a elliptical in advance to reduce the amount of deformation due to the throttling action. It is sufficient to increase the outer diameter by 50% of the outer diameter of the port 7 and the discharge port 8.

[0015] Next, FIG. 2 shows another embodiment of the present invention, which has the same structure as the embodiment shown in FIG. During construction, the seal member held by the seal flange 12 is emptied by operating the valve 14. A system with a circular internal hollow structure that allows air to flow in and out. The ring (inflatable seal) is 15.

[0016] In the case of the embodiment shown in FIG. 2, when the seal ring 15 is filled with air, the air pressure This allows the seal ring 15 to be pressed against the outer circumferential surface of the pumping tube 6. This has the advantage that the tube penetration opening 1a can be sealed more reliably. be. Also, when replacing the pumping tube 6, remove the air inside the seal ring 15. For example, the work of removing the seal flange 12 from the pumping tube 6 becomes easier. There are also some advantages.

[0017] Note that the present invention is not limited to the above-mentioned embodiments, and for example, The steady rest portion 12a extending from the flange 12 is not necessarily necessary. and that other various changes may be made within the scope of the gist of the invention. Of course.

[0018]

[Effect of the idea]

As described above, according to the squeezing type concrete pump of the present invention, the casing The diameter of the tube through-hole of the tube should be at least 1.15 times the outer diameter of the tube, and The seal flange that holds the seal member is removably attached to the seal member. Therefore, the sealing member can reliably seal the tube penetration part. In both cases, when replacing the pumping tube, the seal flange can be removed. The flattened pumping tube can be easily pulled out for quick replacement work. In addition, the sealing member has a hollow interior that allows air to enter and exit. This structure allows the sealing member to be pressed against the outer circumferential surface of the pumping tube. This allows for more reliable sealing at the tube penetration opening. , and other excellent effects.

[Brief explanation of drawings]

FIG. 1 is a partial view showing an embodiment of the squeeze-type concrete pump of the present invention.

FIG. 2 is a partial view showing another embodiment of the present invention.

FIG. 3 is a schematic diagram showing an example of a conventional squeeze-type concrete pump.

FIG. 4 is a partially enlarged sectional view of FIG. 3 showing a tube through-hole portion.

[Explanation of symbols]

1 Casing 1a Tube penetration port 6 Pumping tube 6a Intermediate portion 11 Seal member 12 Seal flange 13 Bolt 15 Seal ring (seal member) D ₁ Outer diameter of pumping tube D ₂ Diameter of tube penetration port

──────────────────────────────────────────────── ─── Continuation of front page (72) Creator Takashi Kimura Ishikawajima, 3-1-15 Toyosu, Koto-ku, Tokyo Harima Heavy Industries Co., Ltd. Toji Technical Center - inside (72) Creator Katsuo Kaneda Ishikawa, 2-9-7 Yaesu, Chuo-ku, Tokyo Inside Shima Kenki Co., Ltd.

Claims (2)

[Scope of utility model registration request] Claim 1: Both ends of a pumping tube, the middle part of which is disposed inside a casing, protrude to the outside through a tube through hole provided in the casing, and by squeezing the middle part of the pumping tube, the concrete drawn in from one end is drawn into the other end. In a squeeze-type concrete pump configured to discharge from the end, the diameter of the tube through-hole is 1.15 times or more the outer diameter of the pumping tube, and the tube through-hole of the casing is brought into contact with the outer peripheral surface of the pumping tube. A squeeze type concrete pump characterized in that a seal flange for holding a seal member configured as described above is detachably attached. 2. The squeeze type concrete pump according to claim 1, wherein the sealing member has an internal hollow structure that allows air to be taken in and taken out.