CN210180868U

CN210180868U - Slump detection device

Info

Publication number: CN210180868U
Application number: CN201920933440.0U
Authority: CN
Inventors: Zhinan Kuai; 郐志楠; Qiushi Yang; 杨秋实; Haijuan Gao; 高海娟; Xiuhui Wang; 王秀辉
Original assignee: Dalian Xingli Luqiao Engineering Co Ltd
Current assignee: Dalian Xingli Luqiao Engineering Co Ltd
Priority date: 2019-06-20
Filing date: 2019-06-20
Publication date: 2020-03-24
Anticipated expiration: 2029-06-20

Abstract

The utility model provides a slump detection device belongs to building engineering technical field, concretely relates to improvement of slump detection device structure. The utility model provides a simple structure can guarantee slump detection device of the experimental precision of concrete slump. The utility model discloses a base, its characterized in that: positioning rods are arranged on two sides of the base, a stepping motor is arranged at the top of the base through a support, and the stepping motor is connected with a bracket on the positioning rods through a screw rod; the bracket is connected with the slump cone on the base through the support rod; the surface of the positioning rod is provided with vertical scales; and a rotatable horizontal scale is arranged at the bottom of the positioning rod.

Description

Slump detection device

Technical Field

The utility model belongs to the technical field of building engineering, concretely relates to improvement of slump detection device structure.

Background

In the cement concrete construction process, the slump of cement concrete needs to be detected, the concrete slump mainly refers to the plasticizing performance and the pumpability of the concrete, and factors influencing the concrete slump mainly include grading change, water content, weighing deviation of a weighing apparatus, the using amount of an additive, cement temperature and the like which are easy to neglect. Slump refers to the workability of concrete, and particularly to the normal operation of construction, wherein the workability includes the water retention, the fluidity and the cohesiveness of the concrete.

In the traditional detection method, a slump cone needs to be manually lifted; after the filling of the slump cone is finished, the slump cone is immediately lifted, the lifting of the slump cone is finished within 5-10 s, and the concrete is not affected by transverse and torsion. The whole process from the start of charging to the lifting of the slump cone should be completed within 150 s. The process of lifting the cylinder wastes time and labor, the manual operation cannot ensure that the slump cone is not influenced by the transverse and torsion actions, and the test time cannot be accurately controlled. Although the problems of automatic slump cone lifting and slump detection are solved by the current invention patent application with the application number of 201811221139.3 and the invention patent application with the application number of 201811546654.9, the problems of automatic filling and slump detection are solved by the invention patent with the application number of 201811546654.9, but the two patents have the following problems in structural design and operation: the traditional slump detection method needs manual lifting of a slump cone, the cone lifting process is time-consuming and labor-consuming, manual operation cannot guarantee that the slump cone is free from transverse and torsion effects, and test time cannot be accurately controlled.

Secondly, the top cross beam of the invention patent application with the application number of 201811221139.3 influences the filling, and the edge of the lower bottom plate has no edge, so that concrete mortar is easy to flow and is inconvenient to clean.

Third, although the invention patent application with application number 201811546654.9 can realize automatic detection, because the position of the highest point of the concrete after collapse is not unique, if no manual intervention exists, the accuracy and precision requirements of detection are difficult to guarantee.

Disclosure of Invention

The utility model discloses be exactly to above-mentioned problem, provide a simple structure, can guarantee the slump detection device of the experimental precision of concrete slump.

In order to realize the above object of the utility model, the utility model discloses a following technical scheme, the utility model discloses a base, its characterized in that: positioning rods are arranged on two sides of the base, a stepping motor is arranged at the top of the base through a support, and the stepping motor is connected with a bracket on the positioning rods through a screw rod; the bracket is connected with the slump cone on the base through the support rod; the surface of the positioning rod is provided with vertical scales; and a rotatable horizontal scale is arranged at the bottom of the positioning rod.

As an optimized scheme of the utility model, locating lever upper portion and lower part all are provided with step motor's limit switch corresponding to the bracket.

As another preferred aspect of the present invention, a tray is provided on the base corresponding to the slump cone.

The utility model has the advantages that: the utility model fully utilizes the existing mature step motor technology and adopts the common mechanical principle to form a set of concrete mixture slump measuring device, and has the advantages of simple structure, convenient operation, reliable performance and no need of special training; wide application range, large demand and good market prospect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a plan view of the present invention.

Fig. 3 is a schematic structural diagram of a base, a tray, a horizontal scale positioning rod, a screw rod and a stand column.

Fig. 4 is a sectional view taken along line I-I of fig. 1.

Fig. 5 is a schematic structural view of the bracket.

Fig. 6 is a schematic view of the structure of the slump cone.

Fig. 7 is a side view of fig. 6.

Fig. 8 is a top view of fig. 6.

In the attached drawing, 1 is a base, 2 is a horizontal scale, 3 is a slump cone, 4 is a positioning rod, 5 is a bracket, 6 is a screw rod, 7 is a support, 8 is a positioning sleeve, 9 is a stepping motor, 10 is an upright post, 11 is a control panel, 12 is a tray, 13 is a limit switch, 14 is an emergency stop key, 15 is an ascending key, 16 is a descending key, 17 is a power switch, 18 is a nut sleeve, 19 is a supporting rod, 20 is a support, and 21 is a supporting platform.

Detailed Description

The utility model discloses a base 1, its characterized in that: positioning rods 4 are arranged on two sides of the base 1, a stepping motor 9 is arranged at the top of the base 1 through a support 7, and the stepping motor 9 is connected with a bracket 5 on the positioning rods 4 through a screw rod 6; the bracket 5 is connected with the slump cone 3 on the base 1 through a support rod 19; the surface of the positioning rod 4 is provided with vertical scales; the bottom of the positioning rod 4 is provided with a rotatable horizontal scale 2.

As a preferred embodiment of the present invention, the upper portion and the lower portion of the positioning rod 4 are provided with a limit switch 13 of the stepping motor 9 corresponding to the bracket 5.

As another preferable embodiment of the present invention, a tray 12 is provided on the base 1 corresponding to the slump cone 3.

The bracket 5 comprises a bracket body, the bracket body is connected with the positioning rod 4 through a positioning sleeve 8, and the bracket body is connected with the screw rod 6 through a nut sleeve 18.

The limit switch 13 is matched with the positioning sleeve 8.

Be provided with bearing 20 on the slump cone 3, die-pin 19 passes through bolted connection with bearing 20.

The number of the support rods 19 is three, and the support rods are respectively fixed with the positioning sleeve 8 and the nut sleeve 18.

The locating sleeves 8 are arranged at two ends of the bracket 5, and the nut sleeve 18 is positioned between the two locating sleeves 8.

Form a triangular support to ensure the stable lifting of the slump cone 3.

The bracket 7 comprises two upright posts 10 arranged on the base 1, the upper ends of the two upright posts 10 are provided with supporting platforms 21, and the upper ends of the positioning rods 4 are fixed with the supporting platforms 21; the stepping motor 9 is arranged on the support platform 21.

The supporting platform 21 is also provided with a control panel 11, and the control panel 11 is provided with a power switch 17 of the stepping motor 9, an ascending key 15, a descending key 16 and an emergency stop key 14.

The maximum reading of the scale on the positioning rod 4 is 35cm, the reading is sequentially reduced to 0 from top to bottom, and the scale of 0 is parallel to the top of the slump cone 3 at the position of 30cm and is parallel to the top surface of the tray 12.

The utility model discloses an operation: step one, turning on a power switch 17, checking whether a system is normal, pressing a descending key 16, driving a screw rod 6 to rotate anticlockwise by a stepping motor 9, descending a slump cone 3 to an initial position, touching a limit switch 13, stopping the work of the stepping motor 9, falling the bottom of the slump cone 3 on a tray 12 at the moment, and making a measurement preparation when the top corresponding reading is 30 cm.

And step two, taking concrete on site, and loading the concrete into the slump cone 3 in three layers, wherein the height of each layer is about one third of the height of the cone. Each layer was tamped 25 times along a spiral from edge to center with a tamp. Each plunge should be evenly distributed across the interface. When the concrete at the side of the cylinder is inserted and tamped, the tamping rod can be slightly inclined. When the bottom layer is inserted and tamped, the tamping rod penetrates the whole depth, and when the other two layers are inserted and tamped, the tamping rod is inserted through the bottom layer and is inserted into the lower layer by about 20-30 mm. After the completion of the filling, the excess concrete is scraped off by a trowel, and the nozzle of the slump cone 3 is smoothed to remove the concrete around the bottom of the slump cone 3.

Step three, pressing a lifting key 15, driving a screw rod 6 to rotate clockwise by a stepping motor 9, driving a slump cone 3 to lift along a positioning rod 4, finishing lifting the slump cone 3 within 5-10 s, and stopping the stepping motor 9 when an upper limit switch 13 is touched; at this time, the concrete slump-forms a cone from the slump cone 3.

And step four, lifting and rotating the scale on the positioning rod 4 according to the operation habit, aligning the lower edge of the scale to the highest point of the slump concrete sample, reading out the vertical distance of the slump on the positioning rod 4, namely the slump of the concrete mixture, wherein the accurate value is 1mm, and the result is corrected to be 5mm which is the closest.

And fifthly, cleaning concrete mixture in the tray 12, cleaning the tray 12 and the slump cone 3, and lifting the slump cone 3 to the top to enable the slump cone 3 to be in an air circulation state, so as to avoid damp corrosion.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims

1. A slump detection device comprises a base (1), and is characterized in that: positioning rods (4) are arranged on two sides of the base (1), a stepping motor (9) is arranged at the top of the base (1) through a support (7), and the stepping motor (9) is connected with a bracket (5) on each positioning rod (4) through a screw rod (6); the bracket (5) is connected with the slump cone (3) on the base (1) through a support rod (19); the surface of the positioning rod (4) is provided with vertical scales; the bottom of the positioning rod (4) is provided with a rotatable horizontal scale (2).

2. The slump detecting device according to claim 1, wherein: the upper part and the lower part of the positioning rod (4) are provided with limit switches (13) of a stepping motor (9) corresponding to the bracket (5).

3. The slump detecting device according to claim 1, wherein: the base (1) is provided with a tray (12) corresponding to the slump cone (3).

4. The slump detecting device according to claim 2, wherein: the bracket (5) comprises a bracket body, the bracket body is connected with the positioning rod (4) through a positioning sleeve (8), and the bracket body is connected with the screw rod (6) through a nut sleeve (18).

5. The slump detecting device according to claim 4, wherein: the limit switch (13) is matched with the positioning sleeve (8).

6. The slump detecting device according to claim 1, wherein: be provided with bearing (20) on slump section of thick bamboo (3), die-pin (19) pass through bolted connection with bearing (20).

7. The slump detecting device according to claim 1, wherein: the number of the support rods (19) is three, and the support rods are respectively fixed with the positioning sleeve (8) and the nut sleeve (18).

8. The slump detecting device according to claim 4, wherein: the locating sleeves (8) are arranged at two ends of the bracket (5), and the nut sleeve (18) is located between the two locating sleeves (8).

9. The slump detecting device according to claim 1, wherein: the support (7) comprises two upright posts (10) arranged on the base (1), the upper ends of the two upright posts (10) are provided with supporting platforms (21), and the upper ends of the positioning rods (4) are fixed with the supporting platforms (21); the stepping motor (9) is arranged on the supporting platform (21).