CN214794321U

CN214794321U - Detection apparatus for cement paste fluidity

Info

Publication number: CN214794321U
Application number: CN202121136588.5U
Authority: CN
Inventors: 杨宝; 陈维敏; 徐亦冬; 黄佳敏
Original assignee: Zhejiang University of Science and Technology ZUST; China Communication South Road and Bridge Co Ltd
Current assignee: Zhejiang University of Science and Technology ZUST; China Communication South Road and Bridge Co Ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2021-11-19
Anticipated expiration: 2031-05-25

Abstract

The utility model discloses a device for detecting the fluidity of cement paste, which comprises a conical die, a glass plate which is in a horizontal state and is provided with cross-shaped scale marks, a lifting device of the conical die and a pressure sensor arranged at the bottom end of the conical die; still include the mark device that stays, the structure of mark device be: the testing device comprises a lifting device, a glass plate, a camera, a main controller and a display, wherein the glass plate is square and is placed on a top plate of a hollow support, the camera is arranged on a bottom plate of the hollow support, the axis of the camera, the intersection point of a cross-shaped scale mark and the axis of a conical die are on the same plumb line, a driving mechanism, a pressure sensor, the camera and the display of the lifting device are electrically connected with the main controller, and an infrared distance measuring sensor is also electrically connected with the main controller; the water tank is connected with the support or the support plate, and a pump and a water spray gun communicated with a water pipe are arranged on the water tank. The detection process has the advantages of high automation degree, relatively high measurement precision and relatively high measurement efficiency.

Description

Detection apparatus for cement paste fluidity

Technical Field

The utility model relates to a building material detects technical field, specifically says a detection device of cement paste fluidity.

Background

The flow property of the slurry reflects the water requirement of the cement-based material and the adaptation degree of the cement-based material and the additive in the aspect of fluidity, and the properties can be expressed by the fluidity of the cement net slurry.

At present, a method for judging the fluidity of cement paste generally adopts a paste fluidity method in the specification of GB/T8077-2012 'concrete additive homogeneity test method', and a truncated cone circular mold is required in the paste fluidity method, namely a metal product with an upper opening diameter of 36mm, a lower opening diameter of 60mm, a height of 60mm and a smooth and seamless inner wall. The cement paste fluidity method in the prior art is widely applied, but the following defects still exist in the actual operation process that manual detection is generally adopted for detecting the cement paste fluidity, the measurement result is that the cement paste fluidity is measured by manual comparison with a straight ruler, the error is large, the measurement precision is not high, the measurement efficiency is relatively low, and improvement is needed urgently.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a detection device that detects the clean thick liquid mobility of cement that process automation degree is higher, measurement accuracy is high relatively, measurement of efficiency is high relatively.

The technical solution of the utility model is to provide a device for detecting the fluidity of cement paste, which comprises a conical die, a glass plate which is in a horizontal state and is provided with cross-shaped scale marks, a lifting device of the conical die and a pressure sensor arranged at the bottom end of the conical die;

still include the mark device that stays, the structure of mark device be:

the glass plate is square and is placed on a top plate of a hollow support, a camera is arranged on a bottom plate of the hollow support, and the axis of the camera, the intersection point of the cross-shaped scale mark and the axis of the conical die are on the same plumb line; or

The glass plate is placed on a supporting plate, the four infrared ranging sensors are arranged on the supporting plate, the axes of the four infrared ranging sensors are arranged on the extension lines of the respective crossed scale marks, the distances between the four vertical axes and the cross points of the crossed scale marks are equal, and the cross points of the crossed scale marks and the axes of the conical dies are on the same plumb line;

the detection device further comprises a main controller and a display, the driving mechanism, the pressure sensor, the camera and the display of the lifting device are electrically connected with the main controller, and the infrared distance measuring sensor is also electrically connected with the main controller.

After the structure above the adoption, the utility model discloses detection device of cement paste fluidity has following advantage:

when the fluidity of the cement paste needs to be detected, the cement paste is poured into a conical die placed on a glass plate, a conical die lifting device is started, the pressure sensor is triggered to be reset and an electric signal is transmitted to a main controller when the conical die leaves the glass plate, the main controller starts timing, a camera is started to shoot or four infrared distance measuring sensors are started to measure distance at a preset time such as 50 seconds, then the camera transmits the shot result or the infrared distance measuring sensors transmit the distance measuring result to the main controller, the main controller transmits the profile of the cement paste flowing shot by the camera or the flowing distance of the cement paste measured by the infrared distance measuring sensors to a display to display, and an operator can immediately divide the four scales to obtain the average flowing distance of the cement paste in unit time as long as the operator sees the four scales. The average value of the four scales can be calculated by the main controller and displayed by a display or reported by voice.

The bracket is hollow and is combined with the transparent glass plate, and the camera is arranged under the cross-shaped intersection point by utilizing the bottom plate of the hollow bracket, so that the lens is centered and has a reasonable interval of 0.5-1 m with the glass plate, the diffusion profile of the cement paste on the glass plate can be directly, clearly and completely shot, the imaging is accurate, the proportion is not disordered, and the accurate measurement effect is obtained.

Or because four infrared ranging sensors are symmetrically arranged at equal intervals, the diffusion distances of the cement paste in four directions on the glass plate can be accurately and reliably measured, and the accuracy of the measurement result is further ensured.

This cement paste testing arrangement, as long as the manual work starts circular cone mould elevating gear, whole testing process is semi-automatization or full automatization, and its degree of automation is high relatively, and measurement of efficiency is high mutually.

Furthermore, the top plate is provided with an Contraband-shaped horizontal slot which is opened at one side and is used for inserting the glass plate. After the structure is adopted, the glass plate can be always kept in a horizontal state, and the glass plate can be conveniently moved in and out when needing to be detached and cleaned or needing to be replaced, so that labor and time are saved.

Furthermore, the lifting device adopts a servo motor fixed on the top plate or the supporting plate of the hollow support, a coaxial screw rod is arranged on an upward motor shaft of the servo motor, a threaded hole of a supporting cross rod is screwed on the screw rod, one end of the supporting cross rod is provided with a hoop tightly holding the top of the conical die, a sliding sleeve at the other end of the supporting cross rod is sleeved on a sliding stand column fixed on the top plate or the supporting plate of the hollow support in a sliding mode, and the cross section of the sliding stand column is square. After adopting above structure, elevating gear simple structure opens and stops that the controllability is good, goes up and down in a flexible way, and operational reliability is strong, and the level is spacing accurate simultaneously, has guaranteed that the center circle on the glass board is adjusted well all the time to the circular cone mould.

Further, the structure of the trace-remaining device is as follows: simultaneously include camera and infrared ray range finding sensor: the glass plate is placed on the top plate of the hollow support, the camera is arranged on the bottom plate of the hollow support, and the axis of the camera, the intersection point of the cross-shaped scale mark and the axis of the conical die are on the same plumb line; the four infrared ranging sensors are arranged on the top plate of the hollow support, the axes of the four infrared ranging sensors are arranged on the extension lines of the respective cross-shaped scale marks, and the distances between the four vertical axes and the cross points of the cross-shaped scale marks are equal. Structure more than adopting, main control unit can divide by 2 after adding the average value that obtains both again, and the mark device that stays has two kinds of functions of camera shooting and infrared ray sensor range finding simultaneously to have more simultaneously above advantage between them, the measuring result is more accurate.

Further, the utility model discloses detection device of the clean thick liquid mobility of cement still includes the water tank of being connected with support or backup pad, has the water spray gun of pump and water pipe intercommunication on the water tank the utility model discloses the testing arrangement of the clean thick liquid mobility of cement. After the structure is adopted, after each detection, the glass plate can be cleaned after collecting cement paste on the glass plate without detaching the glass plate, and the glass plate is prepared for the next detection.

Drawings

Fig. 1 is a schematic perspective view of a first embodiment of the device for testing fluidity of cement paste of the present invention.

Fig. 2 is a schematic perspective view of a second embodiment of the device for testing fluidity of cement paste of the present invention.

Fig. 3 is a schematic perspective view of a third embodiment of the device for testing fluidity of cement paste of the present invention.

Fig. 4 is a schematic view of the bottom and top views of the glass plate with cross-shaped scale lines according to the present invention.

The device comprises a pressure sensor 1, a conical die 2, a hoop 3, a supporting rod 4, a supporting cross rod 5, a screw rod 6, a sliding upright post 7, a sliding sleeve 8, a first top plate 9, a hollow support 10, a supporting leg 11, a horizontal slot 12, a camera 13, a bottom plate 14, a glass plate 15, a servo motor 16, a first infrared ranging sensor 17, a supporting plate 18, a cross-shaped scale mark 19, a cement paste diffusion profile 20, a central circle 21, a second top plate 22 and a second infrared ranging sensor.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 4.

The utility model discloses test device of cement paste fluidity's embodiment one:

the utility model discloses testing arrangement of cement paste fluidity, include conical die 2 and be the glass board 14 of horizontality and have cross scale mark 18, still include conical die 2's elevating gear and establish the pressure sensor 1 in conical die 2 bottom. The conical die 2 is also called a truncated cone round die, and the general specification size and requirements are as follows: the diameter of the upper opening is 36mm, the diameter of the lower opening is 60mm, the height is 60mm, and the metal product is a metal product with smooth and seamless inner wall.

The glass plate 14 is square, the cross-shaped scale marks 18 transversely and longitudinally penetrate through the edges of four sides of the glass plate 14, and a central circle 20 on the glass plate 14 can be coincided with the bottom end excircle of the conical die 2. The cross-shaped scale of fig. 4 may be numbered to provide a more direct visual indication (no numbers are shown). Fig. 4 shows the grout spread profile 19 of the net flow of cement from the moment of detachment of the glass panel 14 from the conical mould 2 to a predetermined moment, for example 50 seconds.

The utility model discloses testing arrangement of cement paste fluidity is still including staying the trace device, the first concrete structure of staying the trace device do: the hollow support 9 comprises a top plate, a bottom plate 13 and a plurality of support legs 10 which are connected with the bottom plate 13 and the top plate, wherein the plurality of support legs are four at four corners of the bottom plate 13. The top plate of the first embodiment employs the first top plate 8, and the glass plate 14 rests on the first top plate 8 of the hollow frame 9. A camera 12 is arranged on a bottom plate 13 of the hollow bracket 9, and the axis of the camera 12, the intersection point of the cross-shaped scale mark 18 and the axis of the conical die 2 are on the same vertical line.

The utility model discloses testing arrangement of cement paste fluidity still includes main control unit and display (all not shown in main control unit and the display picture), and elevating gear's actuating mechanism all is connected with the main control unit electricity like servo motor 15, pressure sensor 1, camera 12 and display. The main controller can be a PLC programmable chip, and can also be a computer such as a portable computer or a desktop computer. The camera head 12 may also be referred to as a camera.

The top plate 8 has a horizontal slot 11 of Contraband shape with one side open for inserting a glass plate 14. It should be understood that the Contraband shape is Contraband shape in horizontal state. Of course, the horizontal slot has two structures in the front view, namely the vertical direction, one structure is shown in figure 1, and the cross section of the slot is L-shaped. Another type of groove may be a vertical Contraband-shaped groove in cross-section.

The automatic lifting device preferably adopts a servo motor 15 fixed on the first top plate 8 of the hollow bracket 9, a coaxial screw rod 5 is arranged on an upward motor shaft of the servo motor 15, and a threaded hole (not shown in the figure) of a supporting cross rod 4 is screwed on the screw rod 5. The device that this lead screw 5 cooperates with the screw hole promptly the nut in order to go up and down is also called ball screw pair, or called ball screw pair. One end of the supporting cross rod 4 is provided with a hoop 3 which tightly holds the top of the conical die 2, an annular groove can be arranged at the top of the conical die 2, and the hoop 3 is held in the annular groove. The anchor ear 3 may also be called a clip. The sliding sleeve 7 at the other end of the supporting cross rod 4 is movably sleeved or slidingly sleeved on the sliding upright 6 fixed on the first top plate 8 of the hollow support 9, and the cross section of the sliding upright 6 is preferably square. Of course, the ball screw pair can also be replaced by an air cylinder or an oil cylinder, the installation position and the connection relation of the ball screw pair are basically the same, and for example, only the free end of the piston rod needs to be fixed with the supporting cross rod.

The utility model discloses testing arrangement of cement paste fluidity still can include the water tank with cavity leg joint, has the water spray gun (water tank, pump, water pipe and water spray gun are not shown in the figure) of pump and water pipe intercommunication on the water tank.

As shown in fig. 2 and 4, the second embodiment of the testing device for cement paste fluidity of the present invention:

the second specific structure of the mark leaving device is as follows: the glass plate 14 is placed on a supporting plate 17, four first infrared ranging sensors 16 are arranged on the supporting plate 17, the axes of the four first infrared ranging sensors 16 are arranged on the extension lines of the cross-shaped scale marks 18, the distances between the four vertical axes of the first infrared ranging sensors 16 and the intersection points of the cross-shaped scale marks 18 are equal, and the intersection points of the cross-shaped scale marks 18 and the axis of the conical die 2 are on the same vertical line. The first infrared ranging sensor 16 is electrically connected to the main controller. The servo motor 15 and the sliding column 6 are fixed on the support plate 17. The rest of the structure is the same as the first embodiment.

As shown in fig. 3 and 4, the third embodiment of the testing device for cement paste fluidity of the present invention:

the structure of the mark retaining device is as follows: simultaneously include camera and infrared ray range finding sensor:

the glass plate is placed on the top plate of the hollow support, the camera is arranged on the bottom plate of the hollow support, and the axis of the camera, the intersection point of the cross-shaped scale mark and the axis of the conical die are on the same plumb line; the four infrared ranging sensors are arranged on the top plate of the hollow support, the axes of the four infrared ranging sensors are arranged on the extension lines of the respective cross-shaped scale marks, and the distances between the four vertical axes and the cross points of the cross-shaped scale marks are equal.

The above paragraph explains that: the third concrete structure of the trace-remaining device is as follows: on the basis of the specific structure of the first embodiment, the following improvements are made: the roof adopts second roof 21, and glass board 14 all has second roof 21 all around. Four second infrared ranging sensors 22 are added to the second top plate 21: the four second infrared ranging sensors 22 are arranged on the second top plate 21, the axes of the four second infrared ranging sensors 22 are on the extension lines of the respective cross-shaped scale marks 18, the distances between the four vertical axes of the second infrared ranging sensors 22 and the intersection points of the cross-shaped scale marks 18 are equal, and the intersection points of the cross-shaped scale marks 18 and the axis of the conical die 2 are on the same vertical line. The second infrared ranging sensor 22 is electrically connected to the main controller. It will be appreciated that the main controller starts timing and starts the camera 12 shooting and the four second infrared ranging sensors 22 ranging at the same time at a predetermined time, for example, 50 seconds.

The infrared distance measuring sensor is also called an infrared distance sensor or an infrared distance measuring sensor. It will be understood that each of the infrared ranging sensors, including the first infrared ranging sensor 16 and the second infrared ranging sensor 22, can detect the grout spread profile 19 by emitting infrared light at a level slightly above the upper plane of the glass sheet 14 and receiving infrared light at a level slightly above the upper plane of the glass sheet 14, e.g., 1mm above the upper plane of the glass sheet 14.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a detection apparatus for cement paste fluidity, includes the cone mould and is the horizontality and has the glass board of cross scale mark, its characterized in that: the device also comprises a lifting device of the conical die and a pressure sensor arranged at the bottom end of the conical die;

still include the mark device that stays, the structure of mark device be:

the glass plate is square and is placed on a top plate of a hollow support, a camera is arranged on a bottom plate of the hollow support, and the axis of the camera, the intersection point of the cross-shaped scale mark and the axis of the conical die are on the same plumb line;

or: the glass plate is placed on a supporting plate, the four infrared ranging sensors are arranged on the supporting plate, the axes of the four infrared ranging sensors are arranged on the extension lines of the respective crossed scale marks, the distances between the four vertical axes and the cross points of the crossed scale marks are equal, and the cross points of the crossed scale marks and the axes of the conical dies are on the same plumb line;

2. The apparatus for detecting fluidity of cement paste according to claim 1, wherein: the top plate is provided with an Contraband-shaped horizontal slot which is opened at one side and is used for inserting the glass plate.

3. The apparatus for detecting fluidity of cement paste according to claim 1, wherein: the automatic lifting device adopts a servo motor fixed on the top plate or the supporting plate of the hollow support, a coaxial screw rod is arranged on an upward motor shaft of the servo motor, a threaded hole of a supporting cross rod is screwed on the screw rod, one end of the supporting cross rod is provided with a hoop tightly holding the top of the conical die, a sliding sleeve at the other end of the supporting cross rod is sleeved on a sliding stand column fixed on the top plate or the supporting plate of the hollow support in a sliding mode, and the cross section of the sliding stand column is square.

4. The apparatus for detecting fluidity of cement paste according to claim 1, wherein: the structure of the mark retaining device is as follows: simultaneously include camera and infrared ray range finding sensor:

5. The apparatus for detecting fluidity of cement paste according to claim 1, wherein: the water tank is connected with the support or the support plate, and a pump and a water spray gun communicated with a water pipe are arranged on the water tank.