SU1199972A1 - Concrete pump - Google Patents

Abstract

CONCRETE PUMP, containing two working cylinders fixed on the walls of the receiving bunker, a discharge pipeline and a distribution device in the form of a pipe installed over the bottom between the two extreme positions of the nozzle, one end of which is permanently connected to the discharge pipe and the other in any from the extreme positions communicated with one of the working cylinders, and the end of the nozzle, facing the working cylinders, is equipped with a wear-resistant ring having evenly outer circumferences located and one-sidedly directed protrusions with short workers and flattened back faces in the form of a toothed rim of a ratchet wheel mounted with the ability to interact with the discrete turning means, characterized in that, to simplify the design, the means for the discrete turning of the wear-resistant ring interaction with the crown of the wear-resistant ring when moving the nozzle. 2. A concrete pump according to claim 1, wherein the projections of the crown of the wear-resistant ring are made in the form of spring-loaded cams installed with the possibility of displacement of the wear-resistant ring into the body when its flat faces interact with the discrete turning means. the emphasis fixed on the bottom of the receiving bunker. 3. Concrete pump according to claim 1, characterized in that the means for discrete rotation is wear-resistant (the ring is made in a vvde fixed on the bottom of the receiving hopper of a spring-loaded non-equal cam, mounted with the possibility of displacement in the direction of the bottom when its flat face interacts with the flat face of the rim 4. A concrete pump according to claim 1, wherein the means for the discrete rotation of the wear ring is made in the form of a spring-loaded pawl fixed to the wall of the receiving hopper. A pump according to claim 1, characterized in that the bottom of the hopper is provided with interchangeable resilient, for example rubber linings, provided with wear-resistant plates for interacting with the wear-resistant ring through a concrete mix between the latter’s crown and the bottom.

Description

The invention relates to pump engineering, in particular to pumps for pumping viscous and non-uniform liquids.

The purpose of the invention is 111 design construction.

Figure 1 shows a concrete pump, a section along a distribution device} in figure 2 is section AA, in figure 1, figure 3 is node G in figure 2, and figure 4 is section AA in FIG. 1 (embodiment of the means for discrete rotation of a wear-resistant ring in the form of a spring-loaded cam) in FIG. 5 is the same; embodiment of means for discrete rotation of the wear-resistant ring in the form of a spring-loaded dog} in FIG. 6 is the same; embodiment of a pump with rotation-resistant rings using a filler betonosmesi.

The concrete pump contains two working cylinders 4 fixed on the walls 1 and 2 of the receiving hopper 3, a discharge pipe 5 and a distribution device installed in the receiving hopper 3 with the possibility of swinging over its bottom 6 between the two extreme positions of the nozzle 7, one end of which with the help of sleeves 8 and 9 are permanently connected to the discharge pipe 5, and the other is connected to one of the working cylinders 4 in any of the extreme positions, and the end of the pipe 7, facing the working cylinders 4, is equipped with a wear-resistant ring U, and evenly around the outer circumference, spaced and one-sidedly directed protrusions 11 with short workers 12 and flat 13 reverse faces in the form of a toothed rim of a ratchet mounted with the ability to interact with the means for its discrete rotation, which, in turn, is installed with the possibility of interacting with the crown of the wear-resistant ring 10 when moving the tubex. 7. The protrusions 11 of the crown of the wear-resistant ring 10 can be made in the form of cams spring-loaded 14, installed with the possibility of displacing the wear-resistant ring 10 into the body when its flat faces 13 interact with the means of its discrete rotation.

leg in the form of a hard stop 15 mounted on the bottom 6;. of the receiving bunker 3 (FIGS. 2 and 3). 4;

The means for the discrete rotation of the wear-resistant ring 10 can be made in the vtsd fixed to the bottom 6 of the receiving hopper 3 spring-loaded by a spring 16 of an unequal-sized cam 17 mounted

10 with the possibility of displacement in the direction of the bottom 6 in the interaction of its flat face with the flat face 13 of the crown of the wear-resistant ring 10 (Figure 4).

15 The means for discrete rotation of the wear-resistant ring is made in the form of a spring-loaded dog 18 fixed on the wall 2 of the receiving hopper 3 (FIG. 5).

20 A variant of the concrete pump is possible, in which the bottom 6 of the receiving hopper can be equipped with replaceable elastic, for example, rubber pads 19, fitted with

25 with wear-resistant plates 20 for engaging with the wear-resistant ring 10 through the aggregate 21 without a mixture, between the latter’s crown and the bottom 6 of the receiving bin 3, the distance from the circumference of the crowns to the bottom is selected according to the condition of the maximum aggregate size (Fig. 6).

- Concrete pump works as follows.

At the end of the injection cycle, in one of the working cylinders 1, the nozzle 7 is transferred to another extreme

4Q position. When moving the nozzle 7, the working faces 12 of the protrusions 11 of the wear-resistant ring 10 come into contact with the means for discrete rotation of this ring — hard rum 15 (FIG. 2), an unequal cam 17 (FIG. 4), spring-loaded dog 18 (FIG. 5) or a filler 21 betonosmes (6). I

At the specified contact, 50 torque occurs, which acts on

wear ring 10, and it rotates at an angle equal to the angular pitch of the protrusions 11. When reverse movement of the nozzle 7, there is a contact of the flat reverse faces 13

protrusions 11 of wear-resistant ring 10 with means for discrete rotation of this ring. When the flat face 13 of the protrusion 11 contacts the rigid stop 15, this protrusion 11 is displaced into the body of the wear-resistant ring 10, and the latter is not turned. When the flat face 1 of the protrusion 11 comes into contact with the cam 17, this cam moves into the body of the bottom 6 of the receiving hopper, and the wear-resistant ring 10 does not turn. When the flat face 13 of the protrusion 11 comes into contact with the pawl 18, the latter rotates about the axis on which this pawl 18 is mounted and the wear-resistant ring 10 does not turn. When the flat face 13 of the protrusion 11 comes into contact with the filler 21, the elastic lining 19 deforms, and the wear-resistant ring 10 does not turn. Thus, when the concrete pump is working on each cycle, a constant discrete rotation of the wear-resistant ring in one direction occurs, which virtually eliminates its uneven wear.

The number of projections 11 of the wear-resistant ring 10 is selected from the condition that one of the projections contact the means for discrete rotation of the ring 10. In the case where the means for discrete rotation of the wear-resistant ring 10 is located below its horizontal axis, the number of projections can be determined by the formula

21G

, 5b

 R (b.r1 .. In the case of the location of the means for the discrete rotation of the wear-resistant ring 10 in its horizontal axis, the number of projections can be determined by the formula 2f

and -

Rp4-hf. + o.5h ° R (h.r1

rb is an integer number of projections from a locally resistant ring; height of protrusions j radius of cavities j

r R is the distance from the axis of rotation of the nozzle to the axis of the wear-resistant ring.

The proposed solution can be used in a concrete pump with a rectilinear movement of the end of the distribution manifold, in this case the number of protrusions of the wear-resistant ring can be determined by the formula 21G

.Z

arccos

hc-1l

It is advisable to choose the height of the protrusions of the wear-resistant rings.

h (0,075 - 0,0825) 0, where D is the diameter of the injection

pipeline

Thus, when implementing the invention, uniform wear of the wear-resistant ring is ensured when the switchgear is operated, which increases the durability of the pump, and in comparison with the known device, a substantial simplification of the design of the concrete pump is achieved by simplifying the means for discrete rotation of the wear-resistant ring.

Fig.Z

Claims (5)

A CONCRETE PUMP containing two working cylinders fixed on the walls of the receiving hopper, a discharge pipe and a switchgear in the form of a nozzle installed in the receiving hopper with the possibility of swinging above its bottom between two extreme positions of the nozzle, one end of which is constantly in communication with the discharge pipeline, and the other in any of the extreme provisions communicated with one of the working cylinders, and the end of the pipe facing the working cylinders is equipped with a wear-resistant ring having uniformly around the outer circumference These located and one-sidedly directed protrusions with short working and gentle reverse faces in the form of a gear ring of a ratchet mounted with the possibility of interaction with means for its discrete rotation, characterized in that, in order to simplify the design, the means for discrete rotation of the wear-resistant ring is installed with the possibility interaction with the crown of the wear-resistant ring when moving the pipe. 2. The concrete pump according to claim 1, characterized in that the protrusions of the wear ring ring are made in the form of spring-loaded cams mounted with the possibility of displacement of the wear ring in the body when its gentle faces interact with its discrete rotation means, the latter being made in the form of a rigid stop fixed on the bottom of the hopper. 3. The concrete pump according to claim 1, characterized in that the means for discrete rotation of the wear-resistant ring is made in the insertion of a spring-loaded unequal cam fixed to the bottom of the receiving hopper, which is mounted with the possibility of displacement towards the bottom when its shallow face interacts with the gently sloping face of the crown wear ring. 4. The concrete pump according to claim 1, characterized in that the means for discrete rotation of the wear-resistant ring is made in the form of a spring-loaded dog mounted on the wall of the receiving hopper. 5. The concrete pump according to claim 1, characterized in that the bottom of the hopper is equipped with replaceable elastic, for example, rubber plates, provided with wear-resistant plates for interaction with the wear-resistant ring through the aggregate of the concrete mixture located between the crown of the last and the bottom. »1199972