CN111516125A - A concrete pouring sample demoulding device - Google Patents

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

A concrete pouring sample demoulding device

technical field

The invention mainly relates to the field of construction engineering, in particular to a demoulding device for concrete pouring samples.

Background technique

Concrete is the largest and most widely used building material in the engineering field, but there are a lot of influencing factors in the production that affect the quality of concrete after it is formed. It is necessary to send samples and test the commercial concrete in use in real time to ensure its forming quality.

At present, a plastic mold provided by CN201710763987.6 is mainly used to test the basic mechanical properties of concrete. The concrete to be tested is poured into the mold, and the basic mechanical properties test is carried out for a specified age of curing. Use a demoulding gun to align the bottom air hole for demoulding. However, if the specimen is not uniformly ejected during the demoulding process, air leakage will easily occur, and it will be extremely difficult to eject the sample; at the same time, there are air holes in the middle of the trial mold for easy ejection, and paper is required for the test. Cover the pores, if the paper is displaced when vibrating, it will cause slurry leakage at the pores, change the local water-cement ratio, and reduce the quality of the prepared concrete samples. At the same time, the cement slurry blocks the pores and is not easy to demould. When preparing porous concrete (such as pervious concrete) or low-strength concrete, the above-mentioned demoulding device fails.

SUMMARY OF THE INVENTION

In view of the performance defects in the prior art, the purpose of the present invention is to provide a concrete sample pouring mold and a supporting concrete sample demoulding device, so as to solve the difficulty of demoulding due to air leakage, and the performance change of the test piece and the blockage of air holes caused by the leakage of the bottom pores. And other issues. At the same time, the main component of the demoulding device is a jacking mechanism, and compared with the traditional demoulding device, the cost is low and the failure rate is low.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

A concrete pouring sample demoulding device, comprising: a pouring mold, a base plate, a first mold constraining arm, a second mold constraining arm, and a jacking mechanism; A sample cavity with an upward opening, the middle of the bottom plate is provided with a demolding hole for the jacking mechanism to extend into, and the side of the bottom plate facing the sample cavity is bonded to a backing plate, the backing plate has a cross section that matches the sample cavity , the top edge of the casting mold is provided with a restraint edge that is folded outwards;

The surface of the base plate is symmetrically arranged with a pair of chute parallel to each other and away from each other, the first mold restraining arm is fixedly erected near one end of the pair of chute, and the bottom end of the second mold restraining arm is embedded in the chute Inside, it is locked by the chute in the vertical direction, and the other side of the second mold restraining arm is connected with the propulsion mechanism that moves along the direction of the chute, so that the second mold restraining arm can move horizontally and locate along the chute. The upper parts of the opposite sides of the first mold restraint arm and the second mold restraint arm are provided with barbs that cooperate with the restraint to block the upward movement of the casting mold;

The lifting mechanism is placed in the middle of the base plate surrounded by the first mold restraining arm, the second mold restraining arm and a pair of chutes, on the lifting mechanism and the barbs of the first and second mold restraining arms A station for locking the casting mould is formed between the lower parts.

Further, the restraint is connected to vertical stiffeners evenly arranged around the casting mold along the lower part.

Further, the propulsion mechanism includes a threaded rod and a fixed arm, the fixed arm is fixed on the base plate away from the jacking mechanism, the fixed arm is further provided with a threaded hole matched with the threaded rod, and one end of the threaded rod passes through the fixed arm to connect to the second The other end of the mold restraining arm is provided with a vertical threaded rod axial rocking handle.

Further, the cross section of the chute is an inverted T-shaped structure, and the bottom end of the second mold restraining arm matches the shape of the cross section of the chute.

Further, the bottom of the template is provided with a hole, and the backing plate fixing bolt is detachably installed in the hole to lock the backing plate.

Beneficial effects:

The demoulding device for concrete pouring samples of the present invention can solve the problem that demoulding cannot be performed due to air leakage when demoulding is currently used with a demoulding gun. At the same time, the device of the invention can also demould concrete materials such as porous and low strength. In addition, the demoulding device adopts the lifting mechanism to manually operate demoulding. Compared with other traditional demoulding devices, it can prevent the effect of slurry leakage on the quality of concrete and the blockage of holes. It has high efficiency, low failure rate and good economy. Advantage.

Description of drawings

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

The size of the sample cavity is designed according to the requirements of the concrete performance testing specification. The attached drawings in this specification mainly take the concrete flexural strength test mold (150mm×150mm×550mm) as an example, and describe other dimensions of the mold in detail. size.

Fig. 1 is the structural drawing of concrete sample pouring mould;

Fig. 2 is the side sectional view of concrete sample pouring mould;

Fig. 3 is the bottom structure diagram of concrete sample pouring mould;

Figure 4 is a structural diagram of the supporting concrete sample demoulding device;

5 is a partial structural diagram of the lower part of the first mold restraining arm of the supporting concrete sample demoulding device;

Figure 6 is a side view of the concrete sample when it is demolded.

The drawings of the concrete sample casting mold include Figure 1, Figure 2 and Figure 3, including the casting mold-1, the sample cavity 111, the template-2, the transverse stiffener-3, the vertical stiffener-4, the restraint edge -5, top plate fixing bolt-6, lifting ring-7, bottom plate-8, demoulding hole-81, pulp stop pad-9, backing plate-10;

The supporting concrete sample demoulding device includes Figure 4, Figure 5 and Figure 6, including a base plate-11, a first mold restraint arm-12, a rocker-13, a jacking mechanism-14, a second mold restraint arm- 15. Barb-151, threaded rod-161, rocking handle-17, fixed arm-18, chute-19.

Detailed ways

In order to make the technical means, creation features, realization purpose and use function of the present invention more clear and intuitive, the present invention will be explained in detail below with reference to the specific embodiments.

Referring to Figures 1 to 6, the present invention provides a concrete sample pouring mold and a matching sample demoulding device. A concrete sample casting mold structure is shown in Figures 1-3. Pouring Mould 1 The casting mould 1 is provided with a sample cavity 111 with an upward opening surrounded by four templates 2 and a bottom plate 8 . The lateral stiffening ribs 3 and the vertical stiffening ribs 4 are installed in the horizontal direction and the vertical direction on the side of the outer wall of the formwork 2 respectively, so as to enhance the mechanical strength of the formed chamber. The top edge of the long side of the sample cavity 111 is provided with a constraining edge 5 that is folded outwards for demolding and fixing. The template 2 , the bottom plate 8 , the transverse stiffener 3 , the vertical stiffener 4 and the restraint edge 5 of the casting mold 1 are made of ABS plastic injection molding to ensure good impact toughness and mechanical strength. The bottom plate 8 is provided with a mold release hole 81 in the center of the back shape, and the mold release hole 81 for the jacking mechanism 14 to extend into. The plate 10 is bonded to prevent the leakage of the cement slurry. A hole is drilled at the bottom of the opposite formwork 2 in the pouring mold 1, so that the backing plate fixing bolt 6 can be inserted. The backing plate 10 can be fixed by inserting the backing plate fixing bolt 6 to prevent the test. When the parts are vibrated, the backing plate 10 is displaced up and down, and lifting rings 7 are symmetrically installed on the outer sides of the upper parts of the two parallel blocks 2 on the casting mold 1 to facilitate sample handling; the backing plate 10 is made of Q235 steel. When pushing out the sample cavity 111 , a uniform thrust is applied to the concrete sample, and the backing plate 10 has a cross-section matching with the sample cavity 111 .

Before the sample is formed, the upper and lower serrated surfaces of the silica gel stop pad 9 are coated with vaseline to further improve the sealing performance of the device. The backing plate 10 is put into the pouring mold 1, and the backing plate fixing bolts 6 are rotated to gradually insert the backing plate fixing bolts 6 into the pouring mold 1, so that the backing plate 10 is fixed in the pouring mold 1 without sliding up and down. After the above steps are completed, the freshly mixed concrete can be poured into the pouring mold 1 to be formed.

The concrete sample pouring mold and the supporting sample demoulding device are shown in Figures 4 to 6, and its structure also includes a base plate 11, a first mold restraint arm 12, a jacking mechanism 14, a second mold restraint arm 15, a propulsion mechanism 16, Chute 19. The base plate 11 is a rectangular block made of Q235 steel. The surface of the base plate 11 is symmetrically arranged with a pair of chutes 19 parallel to and away from each other, and the first mold restraint arm 12 is fixedly erected at one end of the pair of chutes 19 . The bottom end of the second mold restraining arm 15 is embedded in the chute 19, the cross section of the chute 19 is an inverted T-shaped structure, and the bottom end of the second mold restraining arm 15 is matched with the cross-sectional shape of the chute 19, so that the first The two mold restraining arms 15 are locked in the vertical direction by the chute 19, and the other side of the second mold restraining arm 15 is connected with the propulsion mechanism 16 that moves along the direction of the chute 15, and the first mold restraining arm 12 is welded On the base plate 11, its position cannot be moved, so that the second mold restraint arm 15 can move left or right in the chute 19 in the base plate 11, and the second mold restraint arm 15 can be adjusted to the first mold restraint The distance between the arms 12 can be used to fix the casting molds 1 for concrete samples of different specifications. The movement of the second mold restraining arm 15 mainly depends on the propulsion mechanism 16, the propulsion mechanism includes a threaded rod 161, a rocking handle 17, and a fixed arm 18. The fixed arm 18 is far away from the first mold restraint arm 12 and is arranged in parallel and welded. on the substrate 11 . One end of the threaded rod 161 is connected to the second mold restraining arm 15 through the threaded hole of the fixed arm 18, and the other end is connected to the rocking handle 17. By rotating the rocking handle 17 to make the threaded rod 161 axially advance, the second mold restraining arm can be realized. 15 can be displaced in the chute 19, and the positional relationship between the second mold restraining arm 15 and the chute 19 is shown in FIG. 4 . The lifting mechanism 14 adopts a hydraulic jack, which is placed between the first mold restraint arm 12 and the second mold restraint arm 15, and the lifting stroke is 150 mm. The upper parts are provided with barbs 151 that cooperate with the restraint edge 5 to block the upward movement of the casting mold 1. The jacking mechanism 14 is connected with a rocker 13, and the small cylinder of the jacking mechanism 14 is operated by pressing the rocker 13 by hand. The jacking mechanism 14 is the main component in the structure of the demoulding device, and is used to push out the concrete specimen in the pouring mold 1 .

After curing the above-mentioned molded concrete specimen to a specified age, as shown in Fig. 6, the casting mold is placed on the lifting mechanism 14 of the demoulding device, and the handle 17 is shaken to make the threaded rod 161 axially advance, and push the second mold. The restraining arm 15 is displaced in the direction of the sample in the chute 19 . The chute 19 must be lubricated with lubricating oil before use to prevent excessive friction between the lower part of the second die restraining arm 15 and the chute 19 . 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 is stopped. Loosen the backing plate fixing bolt 6 of the backing plate 10, shake the rocker 13, so that the jacking mechanism 14 enters the oil, pushes the backing plate 10 to rise, and pushes out the concrete sample in the pouring mold 1.

While the basic principles, main features and advantages of the present invention have been shown and described above, it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but without departing from the spirit or essential characteristics of the invention In the following, the present invention can be implemented in other specific forms. Therefore, the embodiments are to be regarded in all respects as illustrative and not restrictive, and the scope of the invention is to be defined by the appended claims rather than the foregoing description, which are therefore intended to fall within the scope of the claims. All changes within the meaning and scope of the equivalents of , are included in the present invention. Any reference signs in the claims shall not be construed as limiting the involved claim.

In addition, it should be understood that although this specification is described in terms of embodiments, not each embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (5)

1. A concrete pouring sample demoulding device, comprising: 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), It is characterized in that the pouring mold (1) is provided with a sample cavity (111) with an upward opening surrounded by a template (2) and a bottom plate (8) on the side and bottom surfaces, and the bottom plate (8) is provided with The demolding hole (81) into which the jacking mechanism extends, and the side of the bottom plate (8) facing the sample cavity (111) is bonded to the backing plate (10), and the backing plate (10) has a surface corresponding to the sample cavity (111). The matching cross section, the top edge of the casting mold (1) is provided with a restraining edge (5) that is folded outwards; A pair of chute (19) parallel to each other and away from each other are symmetrically arranged on the surface of the base plate (11), and the first mold restraining arm (12) is fixedly erected at one end close to the pair of chute (19), and the second The bottom end of the mold restraining arm (15) is embedded in the chute (19), and is locked in the vertical direction by the chute (19), and the other side of the second mold restraining arm (15) is in line with the sliding groove (19). The propulsion mechanism (16) that moves in the direction of the groove (15) is connected, so that the second mold restraining arm (15) can move and position horizontally along the chute (19). The first mold restraining arm (12) and the second mold restraining arm ( 15) The upper parts of the opposite sides are provided with barbs (151) that cooperate with the restraining edge (5) to block the upward movement of the casting mold (1); The jacking mechanism (14) is placed in the middle of the base plate (11) surrounded by the first mold restraining arm (12), the second mold restraining arm (15) and a pair of chute (19), in the jacking mechanism ( 14) A station for locking the casting mold (1) is formed between the upper part and the lower part of the barbs (151) of the first mold restraint arm (12) and the second mold restraint arm (15). 2 . The demoulding device for concrete pouring samples according to claim 1 , wherein the lower part of the restraining edge ( 5 ) is connected to vertical stiffening ribs ( 4 ) that are evenly arranged around the pouring mold ( 1 ). 3 . 3 . The demoulding device for concrete pouring samples according to claim 1 , wherein the propulsion mechanism ( 16 ) comprises a threaded rod ( 161 ) and a fixed arm ( 18 ), and the fixed arm ( 18 ) is far away from the ceiling. 4 . The lifting mechanism (14) is fixed on the base plate (11), and the fixing arm (18) is further provided with a threaded hole matched with a threaded rod (161), and one end of the threaded rod (161) passes through the fixing arm (18) to connect to the second mold constraint The other end of the arm (15) is provided with a vertical threaded rod (161) and an axial rocking handle (17). 4. The demoulding device for concrete pouring samples according to claim 1, wherein the cross section of the chute (19) is an inverted T-shaped structure, and the bottom end of the second mold restraining arm (15) is The cross-sectional shape of the chute (19) is matched. 5 . The demoulding device for concrete pouring samples according to claim 1 , wherein a hole is provided at the bottom of the template ( 2 ), and a backing plate fixing bolt (6) is detachably installed in the hole to lock the backing plate. 6 . (10).

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