CN1026023C

CN1026023C - Concrete pump

Info

Publication number: CN1026023C
Application number: CN92108856A
Authority: CN
Inventors: 武崎俊夫; 稻田善明
Original assignee: Mitsubishi Heavy Industries Ltd
Current assignee: Mitsubishi Heavy Industries Ltd
Priority date: 1991-07-30
Filing date: 1992-07-29
Publication date: 1994-09-28
Anticipated expiration: 2007-07-29
Also published as: DE4224525A1; DE4224525C2; JP2585147Y2; KR930002668A; KR970001751B1; JPH0512670U; CN1069104A

Abstract

To increase the extent of torque transmissibility as well as to improve the performance of a torque converter by setting a compression rate in a pump torus and an asymmetrical rate in this pump torus and a turbine torus within the specified numerical range each, while forming a turbine blade form into a free vortex form. A torque converter A is provided with a pump 1, a turbine 2 and a stator 3, thereby constituting a torus 4. In this case, a compression rate lp/H of the torus being formed by a pump 1, namely, a pump torus should be set within the range of 0.4-0.6. In addition, an asymmetrical rate lp/lt of the torus being formed by the pump torus/turbine torus, namely, the turbine 2 should be set within the range of 1.1-1.4. Moreover, a blade form of the turbine 2 is made up into a free vortex form. With this constitution, any imbalance between centrifugal force and centripetal force acting on a fluid adjacent to a blade is reduced, thus torque transmissibility is increased.

Description

Concrete pump

The present invention relates to concrete pump, particularly, relate to the structure of its gate chamber improved concrete pump in addition.

Following elder generation is 4 explanation available coagulation soil pumps with reference to the accompanying drawings, among the figure 1,1 ' be concrete piston, 2,2 ' be equipped with this concrete piston 1,1 ' concrete cylinder, the 3rd, gate chamber, and above-mentioned concrete cylinder 2,2 ' the cylinder mouth just open in this gate chamber 3.

4 shake pipe (shaking valve) for being located in the

gate chamber

3,5 for being used to shake the oil hydraulic cylinder that this shakes pipe 4,6 is the hopper that is communicated with gate chamber 3 by opening portion, 7 for being installed on the output tube in the gate chamber 3, this gate chamber 3 is set at above-mentioned concrete cylinder 2,2 ' and output tube 7 between, 7 of output tubes are communicated with the above-mentioned pipe 4 that shakes.

In existing concrete pump shown in Figure 4, starting-up oil cylinder pressure 5 makes and shakes pipe and 4 shake, and concrete cylinder 2 is communicated with output tube 7.

Push away before making the concrete piston 1 of concrete cylinder 2 subsequently, concrete in making concrete cylinder 2 is in 7 outputs of concrete cylinder 2 → shake pipe 4 → output tube, allow the concrete piston 1 of concrete cylinder 2 ' interior ' retreat, the concrete in the hopper 6 through gate chamber 3 suck concrete cylinders 2 ' in.

The starting-up oil cylinder pressure 5 then, shake the aforementioned pipe 4 that shakes by opposite direction, make concrete cylinder 2 ' be communicated with output tube 7.

Make again concrete cylinder 2 ' concrete piston 1 ' preceding pushing away, the concrete of concrete cylinder 2 ' interior through concrete cylinder 2 ' → shake 7 outputs of pipe 4 → output tube, meanwhile, the concrete pistons 1 in the concrete cylinder 2 are retreated, with the concrete in the hopper 6 among gate chamber 3 sucks concrete cylinders 2.

Carry out aforesaid operations repeatedly, just can export concrete incessantly.

Have following problem in the concrete pump of this prior art shown in Figure 4: be in when shaking process when shaking pipe 4, in gate chamber 3, shaking pipe 4 concrete that shake the direction front side can scroll up, and back into up in the hopper 6.

On the other hand, viscosity is high and concrete mobile difference just can flow to the gap part that shakes the direction rear side that shakes pipe 4, but at this only is this flow results that produces by negative pressure, thereby can not fully tamp this gap part, concrete fails to inhale fully the concrete cylinder 2(or 2 ' to the suction side through gate chamber 3 in hopper 6), like this, except having reduced the suction efficiency of concrete pump, also make the concrete bleed and influence its quality, the worst situation is to stop up.

Above problem is that the structure by gate chamber 3 causes.That is to say, the relative hopper 6 in the top of gate chamber 3 is unlimited fully, by shake pipe 4 shake the concrete that discharges by on shift onto in the hopper 6, but do not form a kind of like this structure, so that can force the ground filling by concrete owing to shake the gap part that shakes the direction rear side that shaking of pipe 4 produced.

The present invention promptly proposes at above problem, and one of its purpose is to provide a kind of like this concrete pump, and it can improve the suction efficiency of concrete pump, and pressurized delivered concrete stably.

Another object of the present invention is to provide a kind of like this concrete pump, it overcomes the problems referred to above by the gate chamber that employing has following structure, the structure of this kind gate chamber can be transported to the gap part that shakes the direction rear side that this shakes pipe with the concrete in the gate chamber with forcing when shaking pipe and shake.

Another purpose of the present invention is to provide a kind of like this concrete pump, and it is can be at the concrete bleed few and do not reduce pressurized delivered concrete under the condition of its quality.

In order to realize above purpose, in concrete pump of the present invention, place, aperture on gate chamber top towards hopper, the cap or the cover portion that have certain-length L from concrete cylinder one side setting, this cap or cover portion cover the part in above-mentioned aperture, the gate chamber both sides that feasible cap thus or cover portion both sides link to each other, that is, the section configuration of the axis normal of the concrete cylinder therewith in the top bight of gate chamber is the curved surface that curvature is R.

Pipe when shaking pipe and shake, is shaken to shaking the concrete that push open the direction front side along the internal surface guiding of this cap or cover portion in the cap or the cover portion on the gate chamber top that the present invention adopts, and is transported to the gap part that this shakes the direction rear side forcibly.

Because the existence of this cap or cover portion, just can make because of shaking concrete that shaking of pipe push open and have only seldom that a part turns back to hopper.

The length L of above-mentioned cap or cover portion preferably is equivalent to shake bore D to D/2, but and nonessential like this.This L value should and be shaken the shape of pipe and specific design result such as length according to the given shape and the structure of gate chamber, selectes its optimum value according to purpose of the present invention.

In addition, on the section perpendicular to coagulation cylinder central axis, the curved surface that forms the gate chamber both sides can be such curved surface, and this curved surface makes easily because of what shake pipe and shakes transmission and concrete transmission that action is open to the gap part that shakes the generation of direction rear side that shakes pipe.

Such curved surface is preferably got the part of radius of curvature greater than the circular arc that shakes the pipe radius, but and nonessential like this.

The gate chamber of concrete pump of the present invention is described according to the embodiment shown in Fig. 1,2 and 3 below.In the accompanying drawings.

Fig. 1 is gate chamber one embodiment's the local abridged stereogram that shows bright the present invention's concrete pump;

Fig. 2 is the longitudinal section side view of above-mentioned gate chamber;

Fig. 3 is the longitudinal section front elevation along the A-A line.

In above each figure, be marked with identical several numbers with parts identical in the existing apparatus shown in Figure 4, omit their detailed description.

In Fig. 1 to 3,1,1 ' be concrete piston; 2,2 ' for have this concrete piston 1,1 ' concrete cylinder; 3 is gate chamber; 8 is the apertures of gate chamber 3 tops towards hopper 6; 3 ' for gate chamber 3 from concrete cylinder 2,2 ' one sides towards the aperture 8 cap with preseting length L or cover portion, this cap or cover portion 3 ' the cover part in aperture 8.

In addition, make the both sides of the gate chamber 3 that cap thus or cover portion 3 ' both sides link to each other, promptly the section configuration with the concrete cylinder axis normal in the top bight of gate chamber 3 has curved surface R, and it is a radius of curvature greater than the part of the circular arc of the above-mentioned radius that shakes pipe.

4 shake pipe (shaking valve) for being located in the

gate chamber

3, and 5 for being used for shaking the oil hydraulic cylinder that this shakes pipe, and 7 for being loaded on the output tube in the gate chamber 3, this gate chamber 3 promptly be located at concrete cylinder 2,2 ' and output tube 7 between, output tube 7 is managed 4 and is communicated with shaking.

Above-mentioned radius of curvature R should be greater than the radius that shakes pipe 4.

Specify the operation of the concrete pump shown in Fig. 1,2 and 3 below.

Starting-up oil press pump 5 shakes pipe 4, and concrete cylinder 2 is communicated with output tube 7.

Subsequently pushing away before the concrete piston in the concrete cylinder 21, make concrete in this cylinder 2 via concrete cylinder 2 → shake pipe 4 to be defeated by output tube 7 again, make the concrete piston 1 of concrete cylinder 2 ' interior ' retreat simultaneously, make in the hopper 6 concrete through gate chamber 3 suck concrete cylinders 2 ' in.

Starting-up oil cylinder pressure 5 allows and shakes pipe 4 according to oppositely shaking, and makes concrete cylinder 2 ' be communicated with output tube 7.

Make again concrete cylinder 2 ' concrete piston 1 ' preceding pushing away, the concrete that makes this cylinder 2 ' interior via concrete cylinder 2 ' → shake pipe 4 and flow to output tube 7, meanwhile, the concrete piston 1 of concrete cylinder 2 is retreated, make the interior concrete of hopper 6 among gate chamber sucks concrete cylinder 2.

After this, carry out above-mentioned operation repeatedly, concrete is exported incessantly from output tube 7.

Shaking pipe 4 when shaking, along the cap 3 of gate chamber 3 ' the internal surface guiding shaken pipe 4 and shake pipe 4 and shake the gap part 3a of direction rear side to shaking the concrete that push open the direction front side, being transported to forcibly, and the amount of concrete that turns back among the hopper 6 is reduced.

Above according to the most preferred embodiment specific explanations the present invention, but relevant concrete profile and structure can be done all changes in the present invention's scope.

Concrete pump of the present invention is aforementioned when shaking pipe and shaking pipe and shake, can shake the concrete that push open the direction front side shaking pipe, force to transfer to along the cap of gate chamber and shake pipe and shake the gap part that is situated between after the direction, turn back to this moment in the hopper amount of concrete seldom, thereby can improve the suction efficiency of concrete pump.

Simultaneously, adopt said structure just can reduce concrete bleed phenomenon, help the propelling movement concrete that stably pressurizes.

Claims

1, a kind of concrete pump, it has following structure: suck two concrete cylinders (2 with output operation at the concrete that is used to hocket, 2 ') in have the aperture, also be provided with aperture (8) simultaneously accepts from the concrete of hopper (6) supply on gate chamber (3) top, in gate chamber, use the pipe (4) that shakes that is communicated with concrete output tube (7) alternately to be communicated with in turn with the aperture of above-mentioned concrete cylinder;

Be characterised in that: above-mentioned gate chamber (3) top on the said aperture (8) of hopper (6), from aforementioned concrete cylinder (2,2 ') a side setting has cap or the cover portion (3 ') of certain-length L, cover the part of aperture (8), the both sides of the gate chamber (3) that feasible cap thus or cover portion (3 ') both sides link to each other, that is, the section configuration of the axis normal of the concrete cylinder therewith (2,2 ') in the top bight of gate chamber formation radius of curvature is the curved surface of R.

2, concrete pump as claimed in claim 1 is characterised in that: when the above-mentioned internal diameter that shakes pipe (4) was D, the length L of above-mentioned cap was D/2～D.

3, concrete pump as claimed in claim 1 or 2, be characterised in that: the both sides of the gate chamber (3) that the both sides of aforementioned cap or cover portion (3) are continuous be gate chamber (3) top bight with concrete cylinder (2,2 ') the section configuration of axis normal have above-mentioned curved surface R, it is that the more aforementioned pipe (4) that shakes of radius of curvature is the part of big circular arc for radius.