CN216718119U - Concrete aggregate grading detection device - Google Patents

Abstract

The utility model discloses a concrete aggregate grading detection device which comprises a screening barrel and a fixing support, wherein the screening barrel is formed by connecting a plurality of grades of unit structures in a vertical end-to-end manner, the fixing support is used for fixing the screening barrel, each unit structure comprises an external barrel, each external barrel comprises a vertical section and an inclined section below the vertical section, a first buffer plate which inclines downwards is arranged on the inner wall of one side of the vertical section, and a second buffer plate which inclines downwards is reversely arranged below the opposite side of the first buffer plate; the circular screen is arranged in the inclined section in a sliding mode through a sliding groove in the inner wall of the top of the inclined section. The utility model can periodically stretch out and draw back through the electric push rod and is matched with the vibration motor to replace a shaker to carry out vibration screening on aggregates, and after the vibration duration reaches the standard, the residual non-screened aggregates on the circular screen are driven out from the discharge hole by retracting the electric push rod, thereby replacing the existing step of manual material distribution, effectively shortening the detection duration, improving the detection efficiency and reducing the labor cost input.

Description

Concrete aggregate grading detection device

Technical Field

The utility model relates to the field of concrete detection, in particular to a concrete aggregate gradation detection device.

Background

The grading of the aggregate refers to the matching condition of aggregate size particles. In concrete, the voids of the coarse aggregate are filled with sand grains, and the voids between the sand grains are filled with cement paste. In order to reduce the gaps among aggregate particles as much as possible and achieve the purposes of saving cement and improving strength, the requirement of grading must be provided for the aggregate. The concrete with poor aggregate particle size distribution is inevitably collapsed and separated by slurry, bones and water in the construction process, and is difficult to cast and form, and finally, the concrete finished product, namely honeycomb, dog holes and pitted surfaces, is low in strength and poor in durability. Therefore, the particle composition of the aggregate must be regulated to ensure the production and manufacture of concrete. Otherwise, a great technical and economic loss of concrete works will result.

Good grading criteria are: the aggregate contains more coarse particles, and the gaps of the aggregate are filled with proper medium particles and small particles, so that the void ratio and the total area of the aggregate are smaller. The aggregate with good gradation is used, so that the required cement paste amount is small, the economy is good, and the workability, the compactness and the strength of the concrete can be improved.

According to the hydraulic concrete gravel aggregate test regulation DL/T5151-2001, aggregate grading is usually detected at the present stage by utilizing a set of sand standard sieve and a shaker to separate aggregates, the aggregate grading is determined according to the mass of the residual aggregates on each layer of round-hole sieve or square-hole sieve, and the concrete mixture with good working performance is formed by the minimum mortar volume (completely wrapping the aggregates) and the maximum aggregate volume mainly according to the theory of maximum compactness and minimum porosity; the aggregate pile is divided by a quartering method, and then one fourth of the aggregate pile is taken out and used as a material sample to be screened by a sieve shaker. In the whole process, a large amount of time is consumed, and the detection efficiency of workers is seriously influenced. Therefore, the highway engineering concrete aggregate grading detection device capable of automatically screening and discharging is provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the existing aggregate grading detection device consumes long time, needs manual material distribution of workers, has high labor intensity and influences the detection efficiency.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a concrete aggregate grading detection device comprises a screening barrel and a fixing support, wherein the screening barrel is formed by connecting a plurality of grades of unit structures in a vertical end-to-end mode, the fixing support is used for fixing the screening barrel, each unit structure comprises an outer barrel, each outer barrel comprises a vertical section and an inclined section below the vertical section, a first buffer plate inclining downwards is arranged on the inner wall of one side of each vertical section, and a second buffer plate inclining downwards is reversely arranged below the opposite side of each first buffer plate; the device also comprises a circular screen, wherein the circular screen is arranged in the inclined section in a sliding manner through a sliding chute on the inner wall of the top of the inclined section, and the aperture of the circular screen of the upper-stage unit structure and the aperture of the circular screen of the lower-stage unit structure accord with aggregate gradation; the electric push rod is arranged below the second buffer plate and inclines downwards, and a piston rod of the electric push rod is fixedly connected with the circular screen; a discharge hole is also formed in the lower wall of the top end of the inclined section, and the circular screen moves to the discharge hole position in the contraction state of the electric push rod; the outer side wall of the fixed support is relatively provided with a group of vibrating motors, the bottom end of the fixed support is also provided with a buffer spring, and the buffer spring is fixed on the bottom plate.

Particularly, adjacent unit structures are connected through screw threads.

Particularly, the fixed support is also provided with a material box supporting rod, the tail end of the material box supporting rod is provided with a closed material box, and the top of the closed material box is provided with a connecting pipe used for connecting a discharge port.

Particularly, the upper and lower openings of the vertical section and the inclined section of the outer cylinder are both horizontal openings.

Compared with the prior art, the utility model has the following advantages and beneficial effects: according to the utility model, the electric push rod periodically stretches and cooperates with the vibrating motor to replace a screen shaker to perform vibrating screening on aggregates, after the vibrating duration reaches the standard, the electric push rod is contracted to expel the remaining non-screened aggregates on the circular screen out of the discharge hole, so that the existing manual material distribution step is replaced, the detection duration can be effectively shortened, the detection efficiency is improved, and the labor cost input is reduced.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic sectional view of the plane a-a in fig. 1.

The definitions of the reference symbols in the figures are: unit structure-1; an outer cylinder-11; a vertical section-12; an inclined section-13; magazine bar-14; a sealing magazine-15; a fixed support-2; a first buffer plate-21; a second buffer plate-22; a circular screen-3; a chute-4; an electric push rod-5; a discharge port-6; a vibration motor-7; a buffer spring-8; a bottom plate-9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so as to further understand the concept, the technical problems solved, the technical features constituting the technical solutions, and the technical effects brought by the technical solutions.

As shown in fig. 1 and 2, the concrete aggregate gradation detection device of the utility model comprises a screening cylinder formed by connecting a plurality of unit structures 1 end to end in a vertical direction and a fixing support 2 for fixing the screening cylinder, wherein each unit structure 1 comprises an outer cylinder 11, each outer cylinder 11 comprises a vertical section 12 and an inclined section 13 below the vertical section 12, a first buffer plate 21 inclined downwards is arranged on the inner wall of one side of the vertical section 12, and a second buffer plate 22 inclined downwards is reversely arranged below the opposite side of the first buffer plate 21; the screening device further comprises a circular screen 3, wherein the circular screen 3 is arranged in the inclined section 13 in a sliding mode through a sliding groove 4 in the inner wall of the top of the inclined section 13, and the aperture of the circular screen 3 of the upper-stage unit structure 1 and the aperture of the circular screen 3 of the lower-stage unit structure 1 accord with aggregate grading; the device also comprises an electric push rod 5 which is arranged below the second buffer plate 21 and inclines downwards, and a piston rod of the electric push rod 5 is fixedly connected with the circular screen 3; a discharge port 6 is further formed in the lower wall of the top end of the inclined section 13, and the circular screen 3 moves to the position of the discharge port 6 in the contraction state of the electric push rod 5; a group of vibrating motors 7 are oppositely arranged on the outer side wall of the fixed support 2, a buffer spring 8 is further arranged at the bottom end of the fixed support 2, and the buffer spring 8 is fixed on a bottom plate 9.

As a preferred embodiment, the adjacent unit structures 1 are connected by screw threads; threaded connection is comparatively convenient on the one hand, is convenient for assemble and operate, and on the other hand can fix the relative position between upper and lower and unit structure 1 after the equipment is good, unifies the stress state of aggregate in the whereabouts in-process.

As a preferred embodiment, a magazine support rod 14 is further arranged on the fixed support 2, a closed magazine 15 is arranged at the tail end of the magazine support rod 14, and a connecting pipe for connecting the discharge port 6 is arranged at the top of the closed magazine 15.

In a preferred embodiment, the upper and lower openings of the vertical section 12 and the inclined section 13 of the outer cylinder 11 are both horizontally opened.

The working principle of the utility model is as follows: the aggregate that will divide by the quartering method slowly pours into vertical section 12 in from the cell structure 1 of the top, cover the apron above vertical section 12, the aggregate is the landing downwards under the action of gravity, get into each level of cell structure 1 below after the buffering of first buffer board 21 and second buffer board 22 to accomplish preliminary screening in each level of cell structure 1 at circular screen cloth 3 department, part accords with aperture size and continues to get into next level of cell structure 1, the aggregate that the surplus accords with aperture size and the aggregate that the particle size surpasss circular screen cloth 3 aperture remain on last level of circular screen cloth 3. The vibration motor 7 is started, the vibration motor 7 drives the fixed support 2 to vibrate, the screening cylinder is driven to vibrate together, the electric push rod 5 stretches in a small range, aggregate is screened under the action of vibration and the electric push rod 5, and aggregate with small particle size is reserved with large particle size. In the vibration process, buffer spring 8 of fixed bolster 2 below mainly plays the cushioning effect, avoids the device to the damage in experimental place, prevents the device spring through setting up the balancing weight simultaneously on bottom plate 9. After the vibration is enough, the piston rod drives the circular screen 3 to move to the position above the discharge port 6 by retracting the electric push rod 5, and residual large-particle-size aggregates retained on the circular screen 3 and large-particle-size materials clamped on the circular screen 3 fall off under the vibration action and are transferred into the closed material box 15 below from the discharge port 6. Then, the unit structures 1 at all levels are disassembled in a rotating mode, whether materials remain on the circular screen 3 or not is checked, the closed material boxes 15 at all levels are disassembled, and the screened aggregate is taken out of the material boxes, so that automatic distribution of the aggregate is completed, and complex operation of manual distribution is avoided. And finally, cleaning and maintaining each part.

The terms "connected" and "fixed" in the description of the present invention may be fixed, formed, welded, or mechanically connected, and the specific meaning of the above terms in the present invention is understood.

In the description of the present invention, the terms "center", "upper", "lower", "horizontal", "inner", "outer", etc. are used in the orientation or positional relationship indicated only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element referred to must have a particular orientation and therefore should not be construed as limiting the present invention.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; while the utility model has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.

Claims (4)

1. The concrete aggregate grading detection device comprises a screening barrel and a fixing support (2) for fixing the screening barrel, wherein the screening barrel is formed by connecting a plurality of grades of unit structures (1) in a vertical end-to-end mode, the unit structures (1) are characterized in that each unit structure comprises an external barrel (11), each external barrel (11) comprises a vertical section (12) and an inclined section (13) below the vertical section (12), a first buffer plate (21) which inclines downwards is arranged on the inner wall of one side of the vertical section (12), and a second buffer plate (22) which inclines downwards is reversely arranged below the opposite side of the first buffer plate (21); the aggregate grading sieve is characterized by further comprising a circular sieve (3), wherein the circular sieve (3) is arranged in the inclined section (13) in a sliding mode through a sliding chute (4) in the inner wall of the top of the inclined section (13), and the aperture of the circular sieve (3) of the upper-stage unit structure (1) and the aperture of the circular sieve (3) of the lower-stage unit structure (1) accord with aggregate grading; the device also comprises an electric push rod (5) which is arranged below the second buffer plate (22) and inclines downwards, and a piston rod of the electric push rod (5) is fixedly connected with the circular screen (3); a discharge port (6) is further formed in the lower wall of the top end of the inclined section (13), and the circular screen (3) moves to the position of the discharge port (6) in the contraction state of the electric push rod (5); the outer side wall of the fixed support (2) is relatively provided with a group of vibrating motors (7), the bottom end of the fixed support (2) is further provided with a buffer spring (8), and the buffer spring (8) is fixed on the bottom plate (9).

2. A concrete aggregate gradation detection apparatus according to claim 1, wherein adjacent unit structures (1) are connected by screw threads.

3. The concrete aggregate grading detection device according to claim 1, wherein the fixing support (2) is further provided with a magazine support rod (14), the tail end of the magazine support rod (14) is provided with a closed magazine (15), and the top of the closed magazine (15) is provided with a connecting pipe for connecting the discharge port (6).

4. A concrete aggregate grading detection device according to claim 1, wherein the upper and lower mouths of the vertical section (12) and the inclined section (13) of the outer cylinder (11) are horizontal openings.

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