CN111516125A

CN111516125A - Concrete placement sample shedder

Info

Publication number: CN111516125A
Application number: CN202010330268.7A
Authority: CN
Inventors: 白应华; 张佳; 杨启萌
Original assignee: Hubei University of Technology
Current assignee: Hubei University of Technology
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2020-08-11
Anticipated expiration: 2040-04-24
Also published as: CN111516125B

Abstract

The invention discloses a concrete pouring sample demoulding device, which comprises: the device comprises a pouring mold, a base plate, a first mold constraint arm, a second mold constraint arm and a jacking mechanism, wherein the pouring mold is provided with a sample cavity with an upward opening, the bottom of the pouring mold is provided with a demolding hole for the jacking mechanism to stretch into, the bottom surface of the inner side of the sample cavity is bonded with a base plate, and the top edge of the pouring mold is provided with a constraint edge which is turned outwards; a pair of parallel sliding grooves are arranged on the surface of the substrate, a first mold constraint arm is fixed at one end of each sliding groove, the bottom end of a second mold constraint arm is embedded in each sliding groove, is locked in the vertical direction by each sliding groove and can slide along each sliding groove, and barbs which are matched with the first mold constraint arm and the second mold constraint arm and block the pouring mold from moving upwards are arranged at the upper parts of the opposite sides of the first mold constraint arm and the second mold constraint arm; the jacking mechanism is placed in the middle of the base plate, and a station for locking the pouring mold is formed on the jacking mechanism and between the lower portions of the barbs of the first mold constraint arm and the second mold constraint arm.

Description

Concrete placement sample shedder

Technical Field

The invention mainly relates to the field of constructional engineering, in particular to a concrete pouring sample demoulding device.

Background

The concrete is a building material with the largest consumption and the widest use in the engineering field, but a large number of influencing factors influence the quality of the formed concrete in production, and the commercial concrete in use needs to be subjected to sample sending detection in real time to ensure the forming quality of the commercial concrete.

At present, a plastic mold provided by CN201710763987.6 is mainly used for detecting the basic mechanical property of concrete, the concrete to be detected is put into the mold for casting and molding, the concrete is maintained at a specified age for carrying out a basic mechanical property test, the bottom of the test mold is inverted upwards during demolding, and a demolding gun is used for aligning to an air hole at the bottom for demolding. However, if the test piece is subjected to uneven demolding in the demolding process, the gas leakage phenomenon is easy to occur, and the demolding of the test piece is extremely difficult at the moment; meanwhile, the air hole is reserved in the middle of the test mold, so that the mold can be conveniently taken out, paper is required to cover the air hole in the test, and if the paper is displaced during vibration, slurry leaks from the air hole, so that the local water-cement ratio is changed, the quality of the prepared concrete sample is reduced, and meanwhile, the cement slurry blocks the air hole, so that the mold is not easy to demold. Porous concrete (such as pervious concrete) or low-strength concrete is prepared, and the demoulding device fails.

Disclosure of Invention

Aiming at the performance defects in the prior art, the invention mainly provides a concrete sample pouring mold and a matched concrete sample demolding device, and solves the problems of difficult demolding caused by air leakage, test piece performance change caused by bottom air hole leakage, air hole blockage and the like. Simultaneously, the main part of the demoulding device is a jacking mechanism, and compared with the traditional demoulding device, the demoulding device has low cost and low failure rate.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a concrete placement specimen de-molding apparatus comprising: the device comprises a pouring mold, a base plate, a first mold constraint arm, a second mold constraint arm and a jacking mechanism, wherein the pouring mold is provided with a sample cavity with an upward opening, which is defined by a template and a bottom plate on the side surface and the bottom surface, the middle part of the bottom plate is provided with a demolding hole for the jacking mechanism to extend into, one surface of the bottom plate facing the sample cavity is bonded with a base plate, the base plate is provided with a cross section matched with the sample cavity, and the top edge of the pouring mold is provided with a constraint edge which is turned outwards;

the surface of the substrate is symmetrically provided with a pair of parallel and mutually far away sliding grooves, one end close to the pair of sliding grooves is fixedly erected with the first mold restraint arm, the bottom end of the second mold restraint arm is embedded in the sliding grooves and is locked by the sliding grooves in the vertical direction, the other surface of the second mold restraint arm is connected with a propelling mechanism moving along the direction of the sliding grooves, so that the second mold restraint arm can horizontally move and be positioned along the sliding grooves, and the upper parts of the opposite sides of the first mold restraint arm and the second mold restraint arm are respectively provided with a barb which is matched with the restraint to block the upward movement of the pouring mold;

the jacking mechanism is placed in the middle of the base plate surrounded by the first die constraint arm, the second die constraint arm and the pair of sliding grooves, and a station for locking the pouring die is formed on the jacking mechanism and between the lower portions of the barbs of the first die constraint arm and the second die constraint arm.

Furthermore, the restraint is connected along the lower part and is along the vertical stiffening rib that pouring mould evenly set up all around.

Further, advancing mechanism includes threaded rod, fixed arm, the fixed arm is kept away from climbing mechanism and is fixed on the base plate, the fixed arm still be equipped with threaded rod complex screw hole, threaded rod one end is passed the fixed arm and is connected second mould restraint arm, the other end is equipped with the axial hand (hold) of shaking of perpendicular threaded rod.

Furthermore, the cross section of the sliding groove is of an inverted T-shaped structure, and the bottom end of the restraint arm of the second die is matched with the cross section of the sliding groove in shape.

Furthermore, the bottom of the template is provided with a hole, and a base plate fixing bolt is detachably arranged in the hole to lock the base plate.

Has the advantages that:

the concrete pouring sample demoulding device can solve the problem that demoulding cannot be performed due to air leakage when a demoulding gun is used for demoulding at present. Meanwhile, the device can also be used for demoulding porous concrete materials with low strength and the like. In addition, this shedder adopts climbing mechanism manual operation drawing of patterns, compares other traditional shedder, can prevent to leak thick liquid and block up concrete quality influence and hole, has efficient, and the fault rate is low, advantage such as economic nature is good.

Drawings

The drawings illustrate non-limiting embodiments of the invention in detail, and the objects, features and advantages of the invention will be more fully understood by reading the accompanying drawings of the apparatus of the invention.

The size of the sample cavity is designed according to the size required by the concrete performance detection specification, the other sizes of the mold are described in detail mainly by taking a concrete flexural strength test mold (150mm multiplied by 550mm) as an example in the attached drawings of the specification, and the test mold is not limited to the size.

FIG. 1 is a schematic view of a concrete sample casting mold;

FIG. 2 is a side cross-sectional view of a concrete sample casting mold;

FIG. 3 is a bottom structure view of a concrete sample casting mold;

FIG. 4 is a structural diagram of a supporting concrete sample demolding device;

FIG. 5 is a view showing a lower partial configuration of a first mold restraining arm of the apparatus for stripping concrete samples;

FIG. 6 is a side view of a concrete sample being demolded.

The attached drawings of the concrete sample pouring mold comprise an attached drawing 1, an attached drawing 2 and an attached drawing 3, and the concrete sample pouring mold comprises a pouring mold-1, a sample cavity 111, a template-2, a transverse stiffening rib-3, a vertical stiffening rib-4, a constraint edge-5, a top plate fixing bolt-6, a lifting ring-7, a bottom plate-8, a demoulding hole-81, a grout stopping pad-9 and a backing plate-10;

the matched concrete sample demoulding device comprises a appended figure 4, a appended figure 5 and a appended figure 6, and comprises a base plate-11, a first mould constraint arm-12, a rocking rod-13, a jacking mechanism-14, a second mould constraint arm-15, a barb-151, a threaded rod-161, a rocking handle-17, a fixed arm-18 and a sliding chute-19.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the use functions of the invention more obvious and intuitive, the invention is explained in detail with the specific embodiments below.

Referring to the attached drawings 1-6, the invention provides a concrete sample pouring mold and a matched sample demolding device. A concrete sample pouring mold structure is shown in attached figures 1-3. Pouring mold 1 the pouring mold 1 is provided with a sample cavity 111 which is enclosed by four templates 2 and a bottom plate 8 and has an upward opening. The lateral direction of the outer wall of the template 2 is respectively provided with a transverse stiffening rib 3 and a vertical stiffening rib 4 in the horizontal direction and the vertical direction so as to enhance the mechanical strength of the formed cavity. And the top edge of the long edge of the sample cavity 111 is provided with a constraint edge 5 which is turned outwards and used for demoulding and fixing. The template 2, the bottom plate 8, the transverse stiffening ribs 3, the vertical stiffening ribs 4 and the constraint edges 5 of the pouring mold 1 are integrally poured by ABS plastic injection molding so as to ensure good impact toughness and mechanical strength. The bottom plate 8 is provided with a demoulding hole 81 in the center of a square-back shape, the demoulding hole 81 for the jacking mechanism 14 to extend into is arranged, the upper surface of the bottom plate 8 is bonded with a square-back shaped water stop pad 9, the upper surface of the water stop pad 9 is bonded with a backing plate 10, so that the leakage of cement paste is prevented, the bottom of the opposite templates 2 in the casting mould 1 is respectively drilled with a hole for inserting a backing plate fixing bolt 6, the backing plate 10 can be fixed by inserting the backing plate fixing bolt 6, the backing plate 10 is prevented from moving up and down when a test piece is vibrated, and the outer sides of the upper parts of two parallel block templates 2 on the casting mould 1 are respectively and symmetrically provided with; the backing plate 10 is made of Q235 steel and is used for applying uniform thrust to the concrete sample when the sample cavity 111 is pushed out, and the backing plate 10 has a cross section matched with the sample cavity 111.

Before the sample is formed, vaseline is coated on the upper and lower sawtooth surfaces of the silica gel grout stopping pad 9, and the sealing performance of the device is further improved. The base plate 10 is placed in the pouring mold 1, the base plate fixing bolt 6 is rotated, the base plate fixing bolt 6 is gradually inserted into the pouring mold 1, and the base plate 10 is fixed in the pouring mold 1 and does not slide up and down. After the steps are finished, the newly mixed concrete can be poured into the pouring mold 1 for molding.

The concrete sample pouring mold and the matched sample demolding device are shown in the attached figures 4-6, and the structure of the concrete sample pouring mold further comprises a base plate 11, a first mold constraint arm 12, a jacking mechanism 14, a second mold constraint arm 15, a pushing mechanism 16 and a sliding groove 19. The base plate 11 is a rectangular block made of Q235 steel, a pair of sliding grooves 19 which are parallel to each other and far away from each other are symmetrically arranged on the surface of the base plate 11, one end of each sliding groove 19 is fixedly erected with the first mold constraint arm 12, the bottom end of the second mold constraint arm 15 is embedded in the corresponding sliding groove 19, the cross section of each sliding groove 19 is of an inverted T-shaped structure, the bottom end of the second mold constraint arm 15 is matched with the cross section of the corresponding sliding groove 19 in shape, so that the second mold constraint arm 15 is locked in the vertical direction by the corresponding sliding groove 19, the other surface of the second mold constraint arm 15 is connected with the pushing mechanism 16 which moves along the direction of the corresponding sliding groove 15, the first mold constraint arm 12 is welded on the base plate 11, the position of the first mold constraint arm 12 cannot move, the second mold constraint arm 15 can move leftwards or rightwards in the corresponding sliding groove 19 in the base plate 11, and the distance between, the concrete sample pouring mould 1 with different specifications is fixed. The second die-holding arm 15 is moved mainly by means of an advancing mechanism 16 comprising a threaded rod 161, a rocking handle 17, a fixed arm 18, the fixed arm 18 being arranged in parallel, away from the first die-holding arm 12, and being welded to the base plate 11. One end of the threaded rod 161 is connected with the second die restraint arm 15 through the threaded hole of the fixed arm 18, the other end of the threaded rod 161 is connected with the rocking handle 17, the second die restraint arm 15 can be displaced in the sliding groove 19 by rotating the rocking handle 17 to axially advance the threaded rod 161, and the positional relationship between the second die restraint arm 15 and the sliding groove 19 is shown in fig. 4. The jacking mechanism 14 is a hydraulic jack and is placed between the first die constraint arm 12 and the second die constraint arm 15, the ascending stroke is 150mm, the upper parts of the opposite sides of the first die constraint arm 12 and the second die constraint arm 15 are respectively provided with a barb 151 which is matched with the constraint to block the pouring die 1 to move upwards along the constraint edge 5, the jacking mechanism 14 is provided with a rocker 13 for connection, and a small oil cylinder of the jacking mechanism 14 is operated by pressing the rocker 13 with hand. The jacking mechanism 14 is a main component in the structure of the demoulding device and is used for pushing out a concrete sample in the pouring mould 1.

After the molded concrete sample is cured to a specified age, as shown in fig. 6, the pouring mold is placed on the jacking mechanism 14 of the demolding device, and the handle 17 is shaken to axially advance the threaded rod 161 and push the second mold restraining arm 15 to displace in the direction of the sample in the chute 19. Before the slide groove 19 is used, lubricating oil is adopted for lubrication, so that the excessive friction between the lower part of the second die restraint arm 15 and the slide groove 19 is prevented. When the distance between the first mold restraint arm 12 and the second mold restraint arm 15 is equal to the width of the two restraint edges 5, the handle 17 stops rocking. And (3) loosening the base plate fixing bolt 6 of the base plate 10, and shaking the shaking rod 13 to enable the jacking mechanism 14 to be fed with oil, so that the base plate 10 is pushed to ascend, and the concrete sample in the pouring mold 1 is pushed out.

While there have been shown and described what are at present considered the fundamental principles of the invention, its essential features and advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics 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

1. A concrete placement specimen de-molding apparatus comprising: the device comprises a pouring mold (1), a base plate (11), a first mold restraint arm (12), a second mold restraint arm (15) and a jacking mechanism (14), and is characterized in that the pouring mold (1) is provided with a sample cavity (111) which is surrounded by a template (2) and a bottom plate (8) at the side surface and the bottom surface and has an upward opening, the middle part of the bottom plate (8) is provided with a demoulding hole (81) for the jacking mechanism to extend into, one surface of the bottom plate (8) facing the sample cavity (111) is bonded with a backing plate (10), the backing plate (10) is provided with a cross section matched with the sample cavity (111), and the top edge of the pouring mold (1) is provided with an outward-turned restraint edge (5);

a pair of parallel sliding grooves (19) which are far away from each other are symmetrically arranged on the surface of the base plate (11), a first mold constraint arm (12) is fixedly erected at one end close to the pair of sliding grooves (19), the bottom end of a second mold constraint arm (15) is embedded in the sliding grooves (19) and locked by the sliding grooves (19) in the vertical direction, the other surface of the second mold constraint arm (15) is connected with a propelling mechanism (16) which moves along the direction of the sliding grooves (15), so that the second mold constraint arm (15) can move horizontally and be positioned along the sliding grooves (19), and barbs (151) which are matched with the constraint arms to block the upward movement of the casting mold (1) along the limiting direction (5) are arranged on the upper parts of the opposite sides of the first mold constraint arm (12) and the second mold constraint arm (15);

the jacking mechanism (14) is placed in the middle of the base plate (11) surrounded by the first die constraint arm (12), the second die constraint arm (15) and the pair of sliding grooves (19), and a station for locking the pouring die (1) is formed on the jacking mechanism (14) and between the lower portions of the barbs (151) of the first die constraint arm (12) and the second die constraint arm (15).

2. The concrete pouring specimen stripping device according to claim 1, characterized in that the lower part of the constraining edge (5) is connected with vertical stiffening ribs (4) uniformly arranged along the periphery of the pouring mold (1).

3. The concrete pouring sample demoulding device according to claim 1, wherein the pushing mechanism (16) comprises a threaded rod (161) and a fixed arm (18), the fixed arm (18) is far away from the jacking mechanism (14) and fixed on the base plate (11), the fixed arm (18) is further provided with a threaded hole matched with the threaded rod (161), one end of the threaded rod (161) penetrates through the fixed arm (18) to be connected with the second mould restraint arm (15), and the other end of the threaded rod (161) is provided with a rocking handle (17) perpendicular to the axial direction of the threaded rod (161).

4. The concrete pouring specimen de-molding device according to claim 1, wherein the cross section of the slide groove (19) is an inverted T-shaped structure, and the bottom end of the second mold restraint arm (15) is matched with the cross sectional shape of the slide groove (19).

5. The concrete pouring sample demoulding device according to claim 1, wherein the bottom of the template (2) is provided with a hole, and a pad fixing bolt (6) is detachably arranged on the hole to lock the pad (10).