CN111347544A - Part making machine and rapid forming method of concrete sample - Google Patents

Abstract

The invention belongs to the field of concrete equipment, and particularly discloses a part making machine and a rapid concrete test piece forming method, wherein the part making machine comprises a push fixing platform, a part pushing cylinder, a covering platform, a feeding cylinder, a driven gear and a driving wheel, the feeding cylinder is higher than the covering platform, the bottom of the feeding cylinder is communicated with a connecting pipe, and one end of the connecting pipe, far away from the feeding cylinder, is communicated to a space between the covering platform and the fixing platform; a plurality of arc racks of action wheel week fixedly connected with, driven gear and arc rack are interrupted the meshing, driven gear's center is equipped with reset torsion spring, fixedly connected with connecting rod on the driven gear, connecting rod one end fixedly connected with arc, the connecting pipe is located the rotation route of arc, be equipped with the slide in the connecting pipe, arc sliding connection is in the slide, a plurality of shelves pole of fixedly connected with on the action wheel, the examination mould can promote a shelves pole when pushing away a cylinder promotion examination mould and removing. The scheme solves the problems of low efficiency and high cost of the prior art.

Description

Part making machine and rapid forming method of concrete sample

Technical Field

The invention belongs to the field of concrete equipment, and particularly relates to a rapid forming method of a concrete sample.

Background

In a ready-mixed concrete plant, a precast concrete member plant and a construction unit adopting field centralized mixed concrete, the concrete is sampled and a test piece is manufactured according to the national standard, and the strength of the structural concrete is evaluated according to the strength of the test piece. Therefore, a strict standardized method and device are needed for molding the self-compacting concrete test piece, so that the manufactured test piece can keep the original performance characteristics of the self-compacting concrete and truly reflect the strength of the self-compacting concrete.

In the national standard of Standard for testing mechanical Properties of general concrete (GB/T50081), each step of the method for producing a general concrete sample was specified in detail and standardized. The concrete is divided into two concrete forming methods according to the consistency of the concrete mixture, the concrete with the slump value not more than 70mm is preferably compacted by vibration, and the concrete with the slump value more than 70mm is preferably compacted by a tamping bar manually.

When a test piece is manufactured by vibrating and compacting with a vibrating table, the concrete mixture is loaded into a test mold at one time, and a spatula is used for inserting and tamping along the wall of each test mold during loading, so that the concrete mixture is higher than the opening of the test mold; the test mold is adhered or fixed on a vibration table, the test mold cannot jump during vibration, and the vibration is continued until the surface of the test mold is discharged with slurry and cannot be over-vibrated.

The manual tamping method for manufacturing the test piece comprises the following steps: the concrete mixture is loaded into the mould in two layers, and the loading thickness of each layer is approximately equal; the tamping should be done uniformly from the edge to the centre in a spiral direction. When bottom concrete is inserted and tamped, the tamping bar is required to reach the bottom of the test mold; when the upper layer is inserted and pounded, the pounding rod penetrates through the upper layer and then is inserted into the lower layer for 20-30 mm; the tamper is kept vertical and cannot be inclined when inserted and pounded; and then, inserting and pulling the spatula along the inner wall of the test mould for a plurality of times. The number of times of inserting and smashing each layer is not less than 12 times within 10000mm2 sectional area; and lightly knocking the periphery of the test mold by using a rubber hammer after the inserting and tamping until the hole left by the inserting and tamping rod disappears.

The method for manufacturing the test piece by using the inserted vibrating rod to carry out the vibration compaction is as follows: loading the concrete mixture into a test mold at one time, and inserting and tamping the concrete mixture along each test mold wall by using a spatula during loading, wherein the concrete mixture is higher than a test mold opening; preferably, an inserted vibrating rod with the diameter of 25mm is used, when the vibrating rod is inserted into the test mold for vibrating, the vibrating rod is 10 mm-20 mm away from the bottom plate of the test mold and cannot touch the bottom plate of the test mold, the vibration is continued until the surface is discharged with slurry, and over-vibration is avoided, so as to prevent concrete from segregation; generally, the vibrating time is 20 seconds, the vibrating rod needs to be pulled out slowly, and holes cannot be left after the vibrating rod is pulled out; scraping the excessive concrete on the upper opening of the test mold, and trowelling the concrete when the concrete is close to initial setting.

However, self-compacting concrete has good fluidity and segregation resistance, flows by self-weight during pouring, and is compacted without vibration. The vibration or the insertion operation is carried out when the test piece is molded, on one hand, the molded test piece is inconsistent with the actual engineering situation and cannot objectively reflect the actual engineering strength of the self-compacting concrete, and on the other hand, the vibration or the insertion easily causes the layering or the segregation of aggregate in the concrete, so that the molding of the test piece of the self-compacting concrete fails, and the prepared test piece cannot truly evaluate the strength of the self-compacting concrete. Therefore, the method for manufacturing the test piece of the common concrete is not suitable for the self-compacting concrete.

There is also a relevant regulation for the formation of test pieces of self-compacting concrete, namely "technical Specification for the application of self-compacting concrete" (JGJ/T283). The preparation method is specified as follows: after the self-compacting concrete sampled or mixed in a laboratory is mixed, the self-compacting concrete is molded as soon as possible and is not suitable for more than 15 minutes; the sampled or mixed concrete mixture should be mixed at least three times and then loaded into a container.

In the prior art, the self-compacting concrete is usually and completely poured into the test mold manually, so that the efficiency is low and the labor cost is high.

Disclosure of Invention

The invention aims to provide a workpiece making machine and a concrete sample rapid forming method, and aims to solve the problems of low efficiency and high cost in the prior art.

In order to achieve the purpose, the basic scheme of the invention provides a part manufacturing machine which comprises a part pushing mechanism and a pouring mechanism, wherein the part pushing mechanism comprises a fixed platform, a part pushing cylinder used for pushing a test mold on the fixed platform, and a shielding platform used for shielding the top of the test mold; a plurality of arc racks of action wheel week fixedly connected with, driven gear and arc rack are interrupted the meshing, driven gear's center is equipped with the reset torsion spring that makes driven gear reset when not meshing with the arc rack, fixedly connected with connecting rod on the driven gear, driven gear's one end fixedly connected with and the concentric arc of driven gear are kept away from to the connecting rod, the connecting pipe is located the rotation route of arc, be equipped with the slide in the connecting pipe, the slide runs through the connecting pipe and communicates with the connecting pipe, arc sliding connection is in the slide, a plurality of shelves pole of fixedly connected with on the action wheel, the test mould can promote a shelves pole when pushing away a cylinder and promoting the test mould removal.

The first optimization scheme is as follows: the shading platform is provided with a through hole.

And the second optimization scheme is as follows: and the arc-shaped plate is provided with a semicircular hole.

And the optimization scheme is three: the end of the connecting pipe close to the fixed platform is vertical.

And the optimization scheme is four: the method for quickly forming the concrete test piece by using the piece making machine comprises the following steps:

s1, preparing a workpiece making machine;

s2, completely stirring the self-compacting concrete for at least three times;

s3, filling the self-compacting concrete in the step S2 into a container, and filling the self-compacting concrete into a feeding cylinder of a workpiece making machine by using the container;

and S4, when the liquid level of the self-compacting concrete in the feeding cylinder is higher than the shielding platform, placing the test mold on the fixed platform, and starting the part making machine to enable the self-compacting concrete to enter the test mold from the lower part of the test mold under the action of atmospheric pressure.

The beneficial effect of this scheme lies in: 1. this scheme utilization self-compaction concrete has avoided artifical vibration or has inserted the operation of smashing, has practiced thrift the cost of labor.

2. The high mobility of this scheme utilization self-compaction concrete, application atmospheric pressure is impressed the self-compaction concrete examination mould, has avoided using power equipment to the at utmost, has practiced thrift the cost in the at utmost promptly. Meanwhile, the filling of the test mold can be rapidly completed with high automation degree, and the efficiency is improved.

3. The motion messenger of this scheme utilization examination mould realizes leading of connecting pipe stifled, has further saved the use of inductor. While the maintenance difficulty is relatively low.

4. This scheme can be in succession to trying the mould filling, has higher efficiency.

Drawings

FIG. 1 is a schematic structural diagram of a rapid concrete specimen molding method according to an embodiment of the invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic view of the irrigation mechanism;

fig. 4 is an enlarged view of a portion a in fig. 3.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a piece pushing cylinder 1, a through hole 2, a shielding plate 3, a stop rod 4, a test mold 5, a fixed platform 6, a connecting pipe 7, a driven gear 8, a driving wheel 9, a first rotating shaft 10, a material container 11, a feeding cylinder 12, a connecting rod 13, a second rotating shaft 14, an arc-shaped rack 15, a slide way 16 and an arc-shaped plate 17.

Example (b): the component manufacturing machine in the scheme comprises a pushing mechanism and a pouring mechanism as shown in fig. 1, fig. 2, fig. 3 and fig. 4. The pushing mechanism comprises a fixed platform 6, a pushing cylinder 1 used for pushing the test mold 5 on the fixed platform 6, and a shielding table used for shielding the top of the test mold 5. Hide the platform and lie in fixed platform 6's top, hide bench integrated into one piece and have through-hole 2. The pushing cylinder 1 is communicated with an air pump to drive the pushing cylinder to stretch.

As shown in fig. 2, the filling mechanism includes a frame, a feeding cylinder 12, a driven gear 8 and a driving wheel 9, wherein the feeding cylinder 12 is positioned higher than the covering table. The bottom of the feeding cylinder 12 is communicated with a connecting pipe 7, the connecting pipe 7 is U-shaped, and one end of the connecting pipe 7, which is far away from the feeding cylinder 12, is communicated to the space between the shielding table and the fixed platform 6. Three arc-shaped racks 15 are integrally formed on the peripheral side of the driving wheel 9, a first rotating shaft 10 is fixedly connected to the center of the driving wheel 9, and the first rotating shaft 10 is rotatably connected to the rack through a bearing. The center of driven gear 8 is fixedly connected with second pivot 14, and second pivot 14 passes through the bearing and rotates the connection in the frame, and driven gear 8 is interrupted meshing with arc rack 15.

As shown in fig. 2 and 3, a return torsion spring is sleeved on the second rotating shaft 14, one end of the return torsion spring is fixed on the second rotating shaft 14, and the other end of the return torsion spring is fixed on the frame, so that the driven gear 8 is reset when not meshed with the arc-shaped rack 15. A connecting rod 13 is fixedly connected to the second rotating shaft 14, and an arc-shaped plate 17 concentric with the driven gear 8 is fixedly connected to one end, far away from the driven gear 8, of the connecting rod 13. The connecting pipe 7 is positioned on the rotating path of the arc-shaped plate 17, an arc-shaped slideway 16 is integrally formed in the connecting pipe 7, and the slideway 16 penetrates through the connecting pipe 7 and is communicated with the connecting pipe 7. The arc-shaped plate 17 is connected in the slideway 16 in a sliding manner, three blocking rods 4 are fixedly connected to the first rotating shaft 10, included angles of 120 degrees are formed between the three blocking rods 4 on the same plane, and the test mold 5 can push the blocking rods 4 when the piece pushing cylinder 1 pushes the test mold to move. As shown in fig. 4, a semicircular hole is formed at one end of the arc plate 17 far away from the connecting rod 13.

Initially, the arc 17 seals off the connecting tube 7. After the test mold 5 pushes the stop lever 4 by a certain angle, the arc-shaped plate 17 does not block the connecting pipe 7 any more.

The method for quickly forming the concrete test piece by using the piece making machine comprises the following steps:

s1, completely stirring the self-compacting concrete for at least three times.

S2, the self-compacting concrete in the step S1 is filled into the container 11, and the container 11 is used for filling the self-compacting concrete into the feeding cylinder 12.

S3, when the liquid level of the self-compacting concrete in the feeding cylinder 12 is higher than the shading platform, the test mold 5 is placed on the fixed platform 6, and the air pump is started, so that the pushing cylinder 1 pushes the test mold 5 to move between the shading plate 3 and the fixed platform 6. The test mold 5 pushes a gear lever 4 on the moving path of the test mold 5 to rotate in the moving process, and the gear lever 4 drives the driving wheel 9 to rotate. The arc-shaped rack 15 on the driving wheel 9 drives the driven gear 8 to rotate, and the driven gear 8 drives the connecting rod 13 to rotate. The connecting rod 13 drives the arc-shaped plate 17 to rotate, so that the arc-shaped plate 17 slides in the slideway 16 and does not block the connecting pipe 7 any more. At this time, the self-compacting concrete flows into the test mold 5 under the atmospheric pressure.

And S4, the pushing cylinder 1 is suspended to stretch out, when the self-compacting concrete overflows from the through hole 2, the pushing cylinder 1 is made to stretch out again, the test mold 5 is pushed to move, and the stop lever 4 is continuously pushed to rotate. The stop lever 4 deviates from the movement path of the test mold 5 after rotating, and at the moment, the other stop lever 4 is positioned on the movement path of the test mold 5 after rotating to prepare for the next continuous filling of the test mold 5.

The test mold 5 is continuously pushed, after the test mold 5 leaves the shielding plate 3, the test mold 5 is filled, and the top is flat under the action of the shielding plate 3, so that manual scraping is not needed. The pushing cylinder 1 retracts, and a new test mold 5 is placed on the fixed platform 6 for the next filling.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (5)

1. The system machine, its characterized in that: the test mold testing device comprises a pushing mechanism and a pouring mechanism, wherein the pushing mechanism comprises a fixed platform, a pushing cylinder used for pushing a test mold on the fixed platform, and a shielding table used for shielding the top of the test mold; a plurality of arc racks of action wheel week fixedly connected with, driven gear and arc rack are interrupted the meshing, driven gear's center is equipped with the reset torsion spring that makes driven gear reset when not meshing with the arc rack, fixedly connected with connecting rod on the driven gear, driven gear's one end fixedly connected with and the concentric arc of driven gear are kept away from to the connecting rod, the connecting pipe is located the rotation route of arc, be equipped with the slide in the connecting pipe, the slide runs through the connecting pipe and communicates with the connecting pipe, arc sliding connection is in the slide, a plurality of shelves pole of fixedly connected with on the action wheel, the test mould can promote a shelves pole when pushing away a cylinder and promoting the test mould removal.

2. The workpiece maker of claim 1, wherein: the shading platform is provided with a through hole.

3. The workpiece maker of claim 2, wherein: and the arc-shaped plate is provided with a semicircular hole.

4. The workpiece maker of claim 3, wherein: the end of the connecting pipe close to the fixed platform is vertical.

5. The rapid forming method of the concrete test piece is characterized by comprising the following steps: the method comprises the following steps:

s1, preparing a workpiece making machine;

s2, completely stirring the self-compacting concrete for at least three times;

s3, filling the self-compacting concrete in the step S2 into a container, and filling the self-compacting concrete into a feeding cylinder of a workpiece making machine by using the container;

and S4, when the liquid level of the self-compacting concrete in the feeding cylinder is higher than the shielding platform, placing the test mold on the fixed platform, and starting the part making machine to enable the self-compacting concrete to enter the test mold from the lower part of the test mold under the action of atmospheric pressure.

Images