CN219820163U - Cement mortar mixer - Google Patents
Cement mortar mixer Download PDFInfo
- Publication number
- CN219820163U CN219820163U CN202321218157.2U CN202321218157U CN219820163U CN 219820163 U CN219820163 U CN 219820163U CN 202321218157 U CN202321218157 U CN 202321218157U CN 219820163 U CN219820163 U CN 219820163U
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- Prior art keywords
- cement mortar
- gear
- transmission shaft
- shaft
- mortar mixer
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- 239000011083 cement mortar Substances 0.000 title claims abstract description 45
- 238000003756 stirring Methods 0.000 claims abstract description 29
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 abstract description 8
- 239000004568 cement Substances 0.000 description 13
- 239000004570 mortar (masonry) Substances 0.000 description 6
- 239000004567 concrete Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The utility model relates to the field of cement mortar detection, in particular to a cement mortar stirrer, which comprises a transmission shaft, wherein one end of the transmission shaft is linked with a driving motor, and the other end of the transmission shaft is connected with an eccentric seat; the stirring blade is connected with a gear shaft, and the gear shaft is linked with the transmission shaft; an internal gear is arranged above the eccentric seat, a planetary gear is arranged on the gear shaft, the planetary gear is meshed with the internal gear, and the gear shaft rotates around the transmission shaft and simultaneously realizes autorotation; and the torque sensor is connected with the internal gear through a connecting piece and is used for detecting the torque generated by the stirring blade. After the scheme is adopted, when cement mortar is uniformly stirred, the fluidity is measured by the received torque, so that the detection result is more accurate.
Description
Technical Field
The utility model relates to the field of cement mortar detection, in particular to a cement mortar stirrer.
Background
With the development of concrete construction technology and the importance of concrete durability, people pay more and more attention to cement and the workability of cement to concrete, and have put higher demands on the workability of cement and concrete. Such as a sufficient fluidity for a prescribed period of time, a high fluidity, and ease of pumping.
The mobility of the cement mortar is reflected by the plasticity of the cement mortar, and after the mobility of the cement mortar is measured by jumping the cement mortar on a diving table according to the specified operation, the bottom diffusion diameter is expressed by mm, and the mobility is expressed by the size of the diffusion diameter. The lower the standard consistency water demand of the cement, the better the cement performance, which shows that the cement mortar or concrete has better fluidity under a certain water-cement ratio or water-cement ratio.
However, the existing method for testing the fluidity of cement mortar by using a runout measuring method has larger errors, which not only is reflected in errors existing in equipment factors, but also has human operation factors:
the stirred cement mortar needs to be operated rapidly, and if the stirred cement mortar is kept stand for a few minutes after stirring or is delayed in the operation process, the fluidity is reduced;
when the first layer is tamping, the tamping rod is required to be slightly inclined along the direction of the wall of the test mould, some detection personnel vertically tamp the material by using the tamping rod, and the test mould is a round table with a large bottom, so that the tamping area of the material is insufficient and the data is inaccurate;
the tamping force of the two layers of materials is uniform, the size is proper, if the tamping force is not uniform, the tested mortar test piece is easy to generate irregular shape, the diameter value in the vertical direction is larger, if the force is large, the fluidity value is smaller than the force during tamping, and the operator value during tamping is larger;
the bottom diameter after mortar spreading should be measured from the edge of the mortar particles, not from the edge of the net mortar.
Accordingly, the inventor further research and develop a cement mortar mixer, and the scheme is generated.
Disclosure of Invention
The utility model aims to provide a cement mortar mixer, which measures the fluidity by the torque received when cement mortar is uniformly mixed, so that the detection result is more accurate.
In order to achieve the above object, the technical scheme of the present utility model is as follows:
a cement mortar mixer comprises
One end of the transmission shaft is linked with the driving motor, and the other end of the transmission shaft is connected with the eccentric seat;
the stirring blade is connected with a gear shaft, and the gear shaft is linked with the transmission shaft;
an internal gear is arranged above the eccentric seat, a planetary gear is arranged on the gear shaft, the planetary gear is meshed with the internal gear, and the gear shaft rotates around the transmission shaft and simultaneously realizes autorotation;
and the torque sensor is connected with the internal gear through a connecting piece and is used for detecting the torque generated by the stirring blade.
Cement mortar is a viscoplastic bingham fluid, and when flowing or stirring, the cement mortar overcomes the yield stress and viscosity of the cement mortar, so that a certain force is required to be applied to realize flowing or stirring. On the contrary, a reaction force is applied to the stirring device, and the magnitude of the reaction force is closely related to the flow property of the mortar, namely, the fluidity of the mortar. The planetary gear functions to provide the stirring blade with the ability to "revolve" and "spin".
Based on the existing cement mortar mixer, a torque sensor is arranged to measure the torque applied when the cement mortar is mixed by the mixing blades (namely, the resistance of the cement mortar to the mixing blades is generated), so that the fluidity is detected, and the better the fluidity is, the smaller the measured torque is; the mode can avoid errors in manual operation, and the gaps between the stirring blades and the pot wall, the thickness of the stirring blades and the material of the stirring pot can be subjected to standardized design.
Further, the planetary gear is located inside the internal gear, and a second bearing is arranged between the gear shaft and the eccentric seat.
Further, the connecting piece comprises a bearing seat, a first bearing is arranged between the bearing seat and the transmission shaft, and the bearing seat is connected with the torque sensor.
The bearing seat is in rolling connection with the transmission shaft, so that the influence of the torque sensor on the transmission shaft is reduced as much as possible.
Further, a torque sensor is provided on the upper beam.
Further, the torque sensor is connected with the bearing seat and the upper beam respectively.
Further, the first bearing and the second bearing are both ball bearings.
Further, the internal gear is fixed on the bearing seat.
Further, the torque sensor has a maximum torque range of 5Nm to 20Nm.
The sensor selects a proper measuring range, so that the requirement of the maximum torque value measuring range during stirring is met, and the requirement of small-range measuring precision is also met. And an oversized range sensor is selected, and the error is larger in the detection of a small range. Selecting a sensor with too small a range will not reach the detected torque peak.
After the scheme is adopted, compared with the prior art, the utility model has the following advantages:
the torque sensor is added on the planetary cement mortar stirrer, the torque of the stirrer during cement mortar stirring is detected, and the fluidity of cement mortar is measured by the torque, so that a novel detection method and instrument are provided for society to measure the fluidity of cement mortar, the instrument and equipment for detecting the physical properties of cement are high in technology and automation, personal errors are reduced, labor intensity is reduced, and the detection result is stable and accurate.
Drawings
FIG. 1 is a schematic illustration of the present utility model;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
description of the reference numerals
A transmission shaft 1, a planetary gear 2, a gear shaft 3, a stirring blade 4, a torque sensor 5,
an upper beam 6, a bearing seat 7, an internal gear 8, an eccentric seat 9, a first bearing 10,
a second bearing 11, a stirred tank 12.
Detailed Description
The utility model will be further described with reference to the drawings and the specific examples.
As shown in fig. 1 and 2, a cement mortar mixer includes a mixing pot 12, in which cement mortar is placed in the mixing pot 12, and is mixed by a rotating mixing blade 4, and rotation and lifting of the mixing blade 4 are driven by different driving devices disposed on the left side. The driving part on the left side can be realized by adopting the existing structure, and special design is not needed, and the design from the transmission shaft to the stirring blade 4 part on the right side (as shown in fig. 3) is focused:
as shown in fig. 3, a torque sensor 5 for testing the torque applied to the stirring blade 4 is provided around above the drive shaft 1, but not in direct contact with the drive shaft. The outer ring of the torque sensor 5 is connected with the upper beam 6, the inner ring is connected with the bearing seat 7 below, a plurality of first bearings 10 are arranged between the bearing seat 7 and the transmission shaft 1, an inner gear 8 is arranged below the bearing seat 7, an eccentric seat 9 is arranged below the inner gear 8, the inner gear 8 is positioned on the outer ring of the planetary gear 2, and a second bearing 11 is arranged between the eccentric seat 9 and the gear shaft 3, so that the gear shaft 3 can rotate relative to the inner gear 8 when the inner gear 8 follows the rotation of the gear shaft 3.
The upper end of the transmission shaft 1 is linked with a left driving device to realize rotation, the lower end of the transmission shaft 1 is connected with an eccentric seat 9, meanwhile, the transmission shaft 1 is positioned in the middle of an internal gear 8, the internal gear 8 is meshed with a planetary gear 2, the planetary gear 2 is connected with a gear shaft 3, the gear shaft 3 is connected with a stirring blade 4, namely, the stirring blade 4 has the capabilities of revolution and autorotation through the cooperation of the planetary gear 2 and the internal gear 8, so that the aim of stirring cement mortar uniformly as much as possible is fulfilled.
Cement mortar is a viscoplastic bingham fluid, and when flowing or stirring, the cement mortar overcomes the yield stress and viscosity of the cement mortar, so that a certain force is required to be applied to realize flowing or stirring. On the contrary, a reaction force is applied to the stirring device. The magnitude of this reaction force is closely related to the flow properties of the gum sand, i.e. to the degree of flow of the gum sand. The resistance generated by stirring the rubber sand by the stirring blade 4 is transmitted to the torque sensor 5 through the gear shaft 3, the internal gear 8 and the bearing seat 7, and the torque sensor 5 is a disc type torque sensor.
The range of the sensor is selected as follows: the maximum torque range is 5Nm to 20Nm.
According to GB/T17671-2021 cement mortar strength test method (ISO method) and JC/T681-2022 planetary cement mortar stirrer, the stirring sequence is 30s at low speed, 30s at low speed and sand adding, 30s at high speed (the stirring torque value is the largest at this time), 90s stopping and 60s at high speed (the torque value is the smallest at this time). At the highest and lowest agitation, the torque values differ by a factor of 2 to 4. The torque value is also related to cement variety (common cement, pozzolan cement, fly ash cement, composite cement, etc.).
The foregoing is only specific embodiments of the present utility model, and words such as "upper, lower, left, right, middle" and the like "related to the present utility model are merely used by way of reference, not to be construed as limiting, and any insubstantial modifications made by the present utility model shall fall within the scope of the utility model.
Claims (8)
1. The utility model provides a cement mortar mixer which characterized in that: comprising
One end of the transmission shaft is linked with the driving motor, and the other end of the transmission shaft is connected with the eccentric seat;
the stirring blade is connected with a gear shaft, and the gear shaft is linked with the transmission shaft;
an internal gear is arranged above the eccentric seat, a planetary gear is arranged on the gear shaft, the planetary gear is meshed with the internal gear, and the gear shaft rotates around the transmission shaft and simultaneously realizes autorotation;
and the torque sensor is connected with the internal gear through a connecting piece and is used for detecting the torque generated by the stirring blade.
2. A cement mortar mixer according to claim 1, wherein: the planetary gear is positioned in the internal gear, and a second bearing is arranged between the gear shaft and the eccentric seat.
3. A cement mortar mixer according to claim 1, wherein: the connecting piece comprises a bearing seat, a first bearing is arranged between the bearing seat and the transmission shaft, and the bearing seat is connected with the torque sensor.
4. A cement mortar mixer according to claim 1, wherein: the torque sensor is arranged on the upper beam.
5. A cement mortar mixer according to claim 1, wherein: the torque sensor is respectively connected with the bearing seat and the upper beam.
6. A cement mortar mixer according to claim 2 or 3, characterized in that: the first bearing and the second bearing are both ball bearings.
7. A cement mortar mixer according to claim 3, wherein: the internal gear is fixed on the bearing seat.
8. A cement mortar mixer according to claim 1, wherein: the maximum torque range of the torque sensor is 5Nm to 20Nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321218157.2U CN219820163U (en) | 2023-05-19 | 2023-05-19 | Cement mortar mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321218157.2U CN219820163U (en) | 2023-05-19 | 2023-05-19 | Cement mortar mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219820163U true CN219820163U (en) | 2023-10-13 |
Family
ID=88251411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321218157.2U Active CN219820163U (en) | 2023-05-19 | 2023-05-19 | Cement mortar mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219820163U (en) |
-
2023
- 2023-05-19 CN CN202321218157.2U patent/CN219820163U/en active Active
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| GR01 | Patent grant |