CN110411887B - Self-contraction test system of cement-based material - Google Patents
Self-contraction test system of cement-based material Download PDFInfo
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- CN110411887B CN110411887B CN201910733881.0A CN201910733881A CN110411887B CN 110411887 B CN110411887 B CN 110411887B CN 201910733881 A CN201910733881 A CN 201910733881A CN 110411887 B CN110411887 B CN 110411887B
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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Abstract
The invention discloses a self-contraction test system of cement-based materials, which comprises a base and a support plate fixedly arranged on the upper end surface of the base, wherein a detection box is rotatably arranged on the front end surface of the support plate, a detection cavity with an upward opening is arranged in the detection box, and a closing mechanism is arranged at an opening on the upper side of the detection cavity.
Description
Technical Field
The invention relates to the technical field of performance detection of cement-based materials, in particular to a self-contraction test system of a cement-based material.
Background
In order to find a way of reducing the self-shrinkage of a cement-based material, enhance the volume stability of the cement-based material and well control cracks generated in the cement-based material, the self-shrinkage of the cement-based material needs to be regularly measured, and the existing cement-based material self-shrinkage measuring instrument mainly measures the self-shrinkage deformation of the cement-based material through the change of the linear length of a cement-based sample so as to further measure the volume stability of the cement-based material, but the change of the linear length of the cement-based material sample has a large error with the actual shrinkage deformation of the cement-based material, so that the stability of the cement-based material cannot be well evaluated;
the technical scheme of application number CN201410398887.4 uses liquid to detect the shrinkage volume of the cement-based material, so that the detection precision is effectively improved, but the total shrinkage of the cement-based material within a period of time can only be detected, the change trend of the shrinkage in the whole detection period can not be detected, and when the liquid is used for volume detection, the cement-based material can absorb a part of liquid, so that a certain error is formed.
Disclosure of Invention
The invention aims to provide a self-contraction test system for cement-based materials, which overcomes the problems.
The invention is realized by the following technical scheme.
The invention discloses a self-contraction test system of cement-based materials, which comprises a base and a support plate fixedly arranged on the upper end surface of the base, wherein a detection box is rotatably arranged on the front end surface of the support plate, a detection cavity with an upward opening is arranged in the detection box, a closing mechanism is arranged at an opening on the upper side of the detection cavity, a lower spring cavity with an upward opening is arranged in the bottom wall of the detection cavity, a lower connecting block is arranged in the lower spring cavity in a sliding manner, a lower spring is connected between the lower connecting block and the bottom wall of the lower spring cavity, the upper end of the lower connecting block extends into the detection cavity, a lower support plate is fixedly arranged at the upper end of the lower connecting block, and after the closing mechanism is opened, the cement-based materials;
a clamping mechanism is arranged in the detection cavity, after the cement-based material is placed, the clamping mechanism clamps the cement-based material, a sand adding hole penetrating left and right is formed in the left wall of the detection cavity, and a valve mechanism is arranged on the left wall of the detection box;
the upper end surface of the base is provided with an installation groove with an upward opening, the bottom wall of the installation groove is fixedly provided with a weight detection mechanism, a sand storage box is arranged on the upper side of the weight detection mechanism, a sand storage cavity is arranged in the sand storage box, fine sand is filled in the sand storage cavity, the upper end surface of the sand storage box is provided with a sand pump, a connecting pipe on the lower side of the sand pump extends into the sand storage cavity, the lower end of the connecting pipe is fixedly provided with a sand suction nozzle, a sand discharge pipe on the upper side of the sand pump extends to the upper side of the detection box, the front end surface of the support plate is fixedly provided with a fixed block, the sand discharge pipe is fixedly connected with the front end surface of the fixed block, the opening of the sand discharge pipe is downward, the detection box is rotated to enable the opening of the sand feeding hole to be upward during detection, the sand pump is started to fill the fine sand into the detection cavity, the fine sand is added into the detection cavity at intervals, an information storage mechanism is fixedly arranged in the base, the weight detection mechanism can detect the weight reduction of the fine sand every time, data are recorded in the information storage mechanism, and the shrinkage of the cement-based material and the change trend of the shrinkage can be known by looking up the data.
Further, the closing mechanism include bilateral symmetry set up in the screw hole of detection case upside, detect chamber upside opening part and placed the apron, bilateral symmetry threaded connection has the screw in the apron, will screw in can with in the screw hole the apron is fixed, thereby will detect the chamber and seal, the fixed handle that is equipped with of apron up end.
Further, the clamping mechanism comprises motor cavities which are symmetrically arranged in the detection box from left to right, the left motor cavity and the right motor cavity are respectively positioned at the left side and the right side of the detection cavity, the inner walls of the left motor cavity and the right motor cavity which are far away from each other are fixedly provided with motors, a threaded rod is dynamically installed on one side of the motor, a clamping rod is slidably installed in a wall body between the motor cavity and the detection cavity, one side of the clamping rod extends into the detection cavity, the other side of the clamping rod extends into the motor cavity and is in threaded connection with the threaded rod, a side spring cavity is arranged in the clamping rod, a slide block is arranged in the side spring cavity in a sliding manner, a side spring is connected between the slide block and the inner wall of the side spring cavity, the opposite end surfaces of the left slide block and the right slide block are fixedly provided with a middle rod extending into the detection cavity, the opposite ends of the left middle rod and the right middle rod are fixedly provided with clamping blocks, the cement-based material is located between the left and right clamping blocks and clamped by the left and right clamping blocks.
Furthermore, the valve mechanism comprises a sealing plate which can slide up and down and is arranged on the left end face of the detection box, a cavity with an opening left is arranged on the left end face of the detection box, an electric guide rail is fixedly arranged on the right wall of the cavity, and a sliding block on the left side of the electric guide rail is fixedly connected with the sealing plate.
Furthermore, the front end face of the supporting plate is fixedly provided with a rotating motor, the front side of the rotating motor is in power connection with a rotating shaft, and the rotating shaft is fixedly connected with the rear end face of the detection box.
Furthermore, the bottom wall of the detection cavity is provided with an air vent which penetrates through the detection cavity from top to bottom, and a breathable film is fixedly installed in the air vent.
Furthermore, a sand discharge hole penetrating left and right is formed in the right wall of the detection cavity, and a sealing plug is detachably mounted at the right opening of the sand discharge hole.
Further, at least two vent holes are arranged.
Further, the fine sand is dry and water-free.
The invention has the beneficial effects that: the invention adopts fine sand to detect the shrinkage of the cement-based material, thereby avoiding the error caused by using liquid, and the invention can carry out detection once at intervals in the whole detection period, and can know the shrinkage change trend of the cement-based material in the detection period according to the detection data of each time after the detection is finished, thereby improving the practicability.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the present invention in operation;
FIG. 3 is a schematic view of the structure of the inspection box 23 of FIG. 1;
FIG. 4 is a schematic view of the structure at A-A in FIG. 1;
fig. 5 is a schematic diagram of the structure at C in fig. 3.
Detailed Description
The invention will now be described in detail with reference to fig. 1-5, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The self-contraction test system of cement-based materials described with reference to fig. 1-5 mainly comprises a base 10 and a support plate 22 fixedly arranged on the upper end surface of the base 10, a detection box 23 is rotatably arranged on the front end surface of the supporting plate 22, a detection cavity 24 with an upward opening is arranged in the detection box 23, a closing mechanism 92 is arranged at the opening at the upper side of the detection cavity 24, a lower spring cavity 37 which is opened upwards is arranged in the bottom wall of the detection cavity 24, a lower connecting block 38 is arranged in the lower spring cavity 37 in a sliding manner, a lower spring 36 is connected between the lower connecting block 38 and the bottom wall of the lower spring cavity 37, the upper end of the lower connecting block 38 extends into the detection cavity 24, and the upper end is fixedly provided with a lower supporting plate 35, after the closing mechanism 92 is opened, placing a cement-based material 25 in the detection cavity 24 and on the upper end face of the lower support plate 35;
a clamping mechanism 91 is arranged in the detection cavity 24, after the cement-based material 25 is placed, the cement-based material 25 is clamped by the clamping mechanism 91, a sand adding hole 26 which penetrates through the left wall and the right wall of the detection cavity 24 is formed in the left wall of the detection box 23, and a valve mechanism 90 is arranged on the left wall of the detection box 23;
the upper end surface of the base 10 is provided with an upward opening installation groove 13, the bottom wall of the installation groove 13 is fixedly provided with a weight detection mechanism 14, the upper side of the weight detection mechanism 14 is provided with a sand storage box 15, the sand storage box 15 is internally provided with a sand storage cavity 18, the sand storage cavity 18 is internally provided with fine sand 17, the upper end surface of the sand storage box 15 is provided with a sand pump 19, a connecting pipe 16 at the lower side of the sand pump 19 extends into the sand storage cavity 18, the lower end of the connecting pipe 16 is fixedly provided with a sand suction nozzle 12, a sand discharge pipe 20 at the upper side of the sand pump 19 extends to the upper side of a detection box 23, the front end surface of a support plate 22 is fixedly provided with a fixed block 21, the sand discharge pipe 20 is fixedly connected to the front end surface of the fixed block 21, the sand discharge pipe 20 is opened downwards, the detection box 23 is rotated during detection to enable the opening of the sand feeding hole 26 to be opened upwards, and the sand, The sand adding holes 26 are filled into the detection cavity 24, the fine sand 17 is added into the detection cavity 24 at intervals in the whole detection period, the information storage mechanism 11 is fixedly arranged in the base 10, the weight detection mechanism 14 can detect the weight reduction of the fine sand 17 every time, data are recorded in the information storage mechanism 11, and the shrinkage and the change trend of the shrinkage of the cement-based material 25 can be known by looking at the data.
The clamping mechanism 91 comprises a motor cavity 43 which is symmetrically arranged in the detection box 23 left and right, the motor cavity 43 is respectively arranged at the left side and the right side of the detection cavity 24, the motor cavity 43 is mutually far away from one inner wall to be fixedly provided with a motor 46 left and right, one side of the motor 46 is dynamically provided with a threaded rod 45, the motor cavity 43 and the detection cavity 24 are slidably provided with a clamping rod 44, one side of the clamping rod 44 extends into the detection cavity 24, the other side of the clamping rod extends into the motor cavity 43 to be in threaded connection with the threaded rod 45, a side spring cavity 41 is arranged in the clamping rod 44, a sliding block 42 is arranged in the side spring cavity 41 in a sliding manner, a side spring 50 is connected between the sliding block 42 and the inner wall of the side spring cavity 41, the opposite end faces of the sliding block 42 are fixedly provided with an intermediate rod 40 extending into the detection cavity 24, and the opposite ends of the intermediate rod 40, the cement-based material 25 is located between the left and right clamping blocks 39 and is clamped by the left and right clamping blocks 39.
The valve mechanism 90 includes a closing plate 28 which is slidably disposed on the left end surface of the detection box 23, the left end surface of the detection box 23 is provided with a cavity 55 which is opened to the left, the right wall of the cavity 55 is fixedly provided with an electric guide rail 54, and a sliding block 53 on the left side of the electric guide rail 54 is fixedly connected with the closing plate 28.
The front end face of the supporting plate 22 is fixedly provided with a rotating motor 52, the front side of the rotating motor 52 is in power connection with a rotating shaft 51, and the rotating shaft 51 is fixedly connected with the rear end face of the detection box 23.
The bottom wall of the detection cavity 24 is provided with a vent hole 34 which penetrates up and down, and a breathable film 33 is fixedly installed in the vent hole 34.
A left-right through sand discharge hole 27 is formed in the right wall of the detection cavity 24, and a closing plug 48 is detachably mounted at the right opening of the sand discharge hole 27.
At least two vent holes 34 are provided.
The fine sand 17 is dry and water-free.
Sequence of mechanical actions of the whole device:
1. screwing off the screw 32, taking down the cover plate 31, and placing the poured cement-based material 25 in the detection cavity 24 and on the upper end face of the lower support plate 35;
2. starting a motor 46, wherein the motor 46 drives a threaded rod 45 to rotate so that the left clamping rod 44 and the right clamping rod 44 are close to each other to clamp the cement-based material 25;
3. starting the rotating motor 52 to enable the rotating shaft 51 to drive the detection box 23 to rotate, and when the sand adding hole 26 is opened upwards, closing the rotating motor 52;
4. the electric guide rail 54 is started to drive the closing plate 28 to slide through the sliding block 53 so as to open the sand adding hole 26;
5. the sand pump 19 is started to enable the fine sand 17 in the sand storage cavity 18 to enter the sand adding hole 26 through the sand suction nozzle 12, the connecting pipe 16 and the sand discharge pipe 20, after the detection cavity 24 is filled, the electric guide rail 54 is started to enable the detection box 23 to rotate rapidly, and after the detection box is stopped, the fine sand 17 is continuously added into the detection cavity 24 until the detection cavity 24, the sand adding hole 26 and the sand discharge hole 27 are completely filled with the fine sand 17;
6. in the whole detection period, the rotating motor 52 is started to rotate the detection box 23 at intervals, gaps among the fine sand 17 in the detection cavity 24 are eliminated, then the sand pump 19 is started to fill the detection cavity 24 with the fine sand 17, the weight detection mechanism 14 detects the weight reduced by the fine sand 17 each time, and information is recorded in the information storage mechanism 11;
7. after the detection is finished, the shrinkage volume of the cement-based material 25 can be calculated according to the weight of the fine sand 17 reduced in the step 6;
8. the weight reduction of the fine sand 17 at each time can also be checked so as to judge the change trend of the shrinkage of the cement-based material 25;
9. the closing plug 48 is removed and the fine sand 17 in the detection chamber 24 is poured out of the sand discharge hole 27.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides a cement-based material's from shrink test system, include the base and fixed set up in the backup pad of base up end, rotatable the installing detection case on the terminal surface before the backup pad, be equipped with the open-ended detection chamber that makes progress in the detection case, it is equipped with closing mechanism, its characterized in that to detect the side opening part on the chamber: a lower spring cavity with an upward opening is formed in the bottom wall of the detection cavity, a lower connecting block is arranged in the lower spring cavity in a sliding mode, a lower spring is connected between the lower connecting block and the bottom wall of the lower spring cavity, the upper end of the lower connecting block extends into the detection cavity, a lower supporting plate is fixedly arranged at the upper end of the lower connecting block, and after the sealing mechanism is opened, cement-based materials are placed in the detection cavity and located on the upper end face of the lower supporting plate;
a clamping mechanism is arranged in the detection cavity, after the cement-based material is placed, the clamping mechanism clamps the cement-based material, a sand adding hole penetrating left and right is formed in the left wall of the detection cavity, and a valve mechanism is arranged on the left wall of the detection box;
the upper end surface of the base is provided with an installation groove with an upward opening, the bottom wall of the installation groove is fixedly provided with a weight detection mechanism, a sand storage box is arranged on the upper side of the weight detection mechanism, a sand storage cavity is arranged in the sand storage box, fine sand is filled in the sand storage cavity, the upper end surface of the sand storage box is provided with a sand pump, a connecting pipe on the lower side of the sand pump extends into the sand storage cavity, the lower end of the connecting pipe is fixedly provided with a sand suction nozzle, a sand discharge pipe on the upper side of the sand pump extends to the upper side of the detection box, the front end surface of the support plate is fixedly provided with a fixed block, the sand discharge pipe is fixedly connected with the front end surface of the fixed block, the opening of the sand discharge pipe is downward, the detection box is rotated to enable the opening of the sand feeding hole to be upward during detection, the sand pump is started to fill the fine sand into the detection cavity, the fine sand is added into the detection cavity at intervals, an information storage mechanism is fixedly arranged in the base, the weight detection mechanism can detect the weight reduction of the fine sand every time, data are recorded in the information storage mechanism, and the shrinkage of the cement-based material and the change trend of the shrinkage can be known by looking up the data.
2. A self-contraction test system of cement-based materials according to claim 1, wherein: the sealing mechanism comprises a bilateral symmetry, the bilateral symmetry is arranged in a threaded hole in the upper side of the detection box, the cover plate is placed at an opening in the upper side of the detection cavity, the bilateral symmetry is in threaded connection with screws in the cover plate, the screws are screwed into the threaded holes, and the cover plate can be fixed, so that the detection cavity is sealed, and a handle is fixedly arranged on the upper end face of the cover plate.
3. A self-contraction test system of cement-based materials according to claim 1, wherein: the clamping mechanism comprises motor cavities which are symmetrically arranged in the detection box from left to right, the left motor cavity and the right motor cavity are respectively positioned at the left side and the right side of the detection cavity, the inner walls of the left motor cavity and the right motor cavity which are far away from each other are fixedly provided with motors, a threaded rod is dynamically installed on one side of the motor, a clamping rod is slidably installed in a wall body between the motor cavity and the detection cavity, one side of the clamping rod extends into the detection cavity, the other side of the clamping rod extends into the motor cavity and is in threaded connection with the threaded rod, a side spring cavity is arranged in the clamping rod, a slide block is arranged in the side spring cavity in a sliding manner, a side spring is connected between the slide block and the inner wall of the side spring cavity, the opposite end surfaces of the left slide block and the right slide block are fixedly provided with a middle rod extending into the detection cavity, the opposite ends of the left middle rod and the right middle rod are fixedly provided with clamping blocks, the cement-based material is located between the left and right clamping blocks and clamped by the left and right clamping blocks.
4. A self-contraction test system of cement-based materials according to claim 1, wherein: the valve mechanism comprises a sealing plate which can slide up and down and is arranged on the left end face of the detection box, a cavity with a left opening is formed in the left end face of the detection box, an electric guide rail is fixedly arranged on the right wall of the cavity, and a sliding block on the left side of the electric guide rail is fixedly connected with the sealing plate.
5. A self-contraction test system of cement-based materials according to claim 1, wherein: the rotary motor is fixedly arranged on the front end face of the supporting plate, a rotary shaft is dynamically connected to the front side of the rotary motor, and the rotary shaft is fixedly connected with the rear end face of the detection box.
6. A self-contraction test system of cement-based materials according to claim 1, wherein: the bottom wall of the detection cavity is provided with an air vent which penetrates through the detection cavity from top to bottom, and a breathable film is fixedly arranged in the air vent.
7. A self-contraction test system of cement-based materials according to claim 1, wherein: the detection cavity right wall is provided with a left sand discharge hole and a right sand discharge hole which penetrate through the detection cavity right wall, and a sealing plug is detachably mounted at an opening on the right side of the sand discharge hole.
8. The self-contraction test system for cement-based materials according to claim 6, wherein: at least two vent holes are arranged.
9. A self-contraction test system of cement-based materials according to claim 1, wherein: the fine sand is dry and water-free.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910733881.0A CN110411887B (en) | 2019-08-09 | 2019-08-09 | Self-contraction test system of cement-based material |
| JP2019210939A JP2021028625A (en) | 2019-08-09 | 2019-11-22 | Self-shrinkage test system for cement-based member |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910733881.0A CN110411887B (en) | 2019-08-09 | 2019-08-09 | Self-contraction test system of cement-based material |
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| CN110411887A CN110411887A (en) | 2019-11-05 |
| CN110411887B true CN110411887B (en) | 2020-09-01 |
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| CN113681678A (en) * | 2021-08-30 | 2021-11-23 | 嘉兴创奇环保材料有限公司 | Forming device for ecological water-permeable mortar components of different specifications |
| CN114136858B (en) * | 2021-11-17 | 2024-03-08 | 盐城保荣机械有限公司 | Detection device is used in production of ventilation flow's ventilated membrane |
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| Publication number | Publication date |
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| CN110411887A (en) | 2019-11-05 |
| JP2021028625A (en) | 2021-02-25 |
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