CN220542680U - Cement flexural strength measuring equipment - Google Patents
Cement flexural strength measuring equipment Download PDFInfo
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- CN220542680U CN220542680U CN202322006466.XU CN202322006466U CN220542680U CN 220542680 U CN220542680 U CN 220542680U CN 202322006466 U CN202322006466 U CN 202322006466U CN 220542680 U CN220542680 U CN 220542680U
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- 239000004568 cement Substances 0.000 title claims abstract description 61
- 238000012360 testing method Methods 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000007689 inspection Methods 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a cement flexural strength measuring device, which belongs to the technical field of cement quality inspection devices and comprises a base; the test box body is arranged on the base; the upper clamping assembly is movably arranged at the top of the test box body through the supporting frame; the upper clamping assembly comprises two symmetrically arranged upper clamping units, and a guide screw and a guide shaft which are movably connected with the upper clamping units; the pressing mechanism is vertically arranged above the test box body through a portal frame; the pressure applying mechanism comprises a hydraulic cylinder and a pressure applying head assembly connected with a piston rod of the hydraulic cylinder. The cement flexural strength measuring equipment can keep the stress of the center of the measuring point, can measure the flexural strength of the soaked cement, can directly perform the underwater flexural test, simulates the actual use environment of the cement blocks, and enables the test result to be more fit with reality.
Description
Technical Field
The utility model relates to cement flexural strength measuring equipment, and belongs to the technical field of cement quality inspection equipment.
Background
In cement concrete tests, it is often necessary to detect the flexural resistance of the cement blocks produced; however, when the existing cement bending detection equipment is used for testing cement, the cement blocks are often subjected to bending resistance test in a dry environment, the service condition of the cement blocks in a real environment cannot be simulated, and the cement blocks are especially like cement blocks for dams and are in underwater humid environment for a long time; if the existing cement folding detection equipment is adopted for testing, the test result cannot be adapted to the real environment, so that the test result is inaccurate; when the existing cement bending detection equipment is used for testing, the sample test point is often deviated due to the fact that the pressure applying head has larger downward impact force on the cement sample, and the center stress of the test point cannot be guaranteed; therefore, in order to solve the above problems, it is necessary to design a new cement flexural strength measuring apparatus.
Disclosure of Invention
In order to solve the problems, the utility model provides a cement flexural strength measuring device which can keep the central stress of a measuring point; and the flexural performance of the soaked cement can be measured, the underwater flexural test can be directly carried out, and the actual use environment of the cement block is simulated, so that the test result is more fit with the actual situation.
The utility model relates to a cement flexural strength measuring device, which comprises
A base;
the test box body is arranged on the base; a test bin is arranged in the test box body; the bottom of the test bin is provided with a stepped positioning seat for placing a cement sample, during test, the cement sample to be tested is placed on the stepped positioning seat, the middle of the cement sample is suspended, and two side edges are attached to the inner wall of the stepped positioning seat; the device comprises a positioning seat, a plurality of standard-size test blocks, a plurality of positioning seats and a plurality of positioning seats, wherein the positioning seats are arranged in a stepped manner, and the positioning seats can be adapted to a plurality of standard-size test blocks and are arranged in a stepped manner according to the sizes of cement samples with different specifications; the top of one side of the test box body is connected with a water inlet pipe; the bottom of the other side of the test box body is connected with a water outlet pipe, and a switch valve is arranged on the water outlet pipe;
the upper clamping assembly is movably arranged at the top of the test box body through the supporting frame; the upper clamping assembly comprises two symmetrically arranged upper clamping units, and a guide screw and a guide shaft which are movably connected with the upper clamping units; the guide screw and the guide shaft are arranged in parallel front and back; one end of the guide screw rod is connected with the supporting frame, and the other end of the guide screw rod penetrates through the supporting frame and is connected with the hand wheel; two ends of the guide shaft are fixedly connected with the support frame respectively; the upper clamping unit comprises an L-shaped sliding arm and a clamping screw rod in threaded connection with the L-shaped sliding arm; one end of the L-shaped sliding arm is in threaded connection with the guide screw rod, and the other end of the L-shaped sliding arm is in sliding connection with the guide shaft; the clamping screw is perpendicular to the L-shaped sliding arm, and a clamping hand wheel is arranged at the upper end of the clamping screw; the lower end of the clamping screw rod passes through the L-shaped sliding arm, and an upper clamping head is arranged at the end part of the clamping screw rod;
the pressing mechanism is vertically arranged above the test box body through a portal frame; the pressure applying mechanism comprises a hydraulic cylinder and a pressure applying head assembly connected with a piston rod of the hydraulic cylinder; the pressing head assembly sequentially comprises an upper connecting seat, an upper pressing disc, a lower pressing disc and Shi Yatou from top to bottom; one side of the upper connecting seat, which is away from the lower pressing disc, is fixedly connected with the piston rod; the upper pressing plate is integrally fixed below the upper connecting seat; the lower pressure plate is movably connected with the upper pressure plate through a guide rod and a nut; the pressure applying head is fixedly arranged below the lower pressure plate; a pressure sensor is also arranged between the upper pressure plate and the lower pressure plate;
before the test, placing the cement sample to be tested into a test bin, and placing the test bin into a stepped positioning seat, wherein the middle of the cement sample is suspended; the upper clamping assembly is used for fixing the sample clamp on the stepped positioning seat, so that the test block can be symmetrically positioned by taking the test point as the center during testing, the clamping stress is uniform, and the stress of the center of the test point is kept; specifically, the hand wheel is rotated, so that the two L-shaped slide arms can relatively move along the guide screw rod and the guide shaft until the two clamping screw rods are positioned above the sample; then, adjusting the clamping hand wheel to enable the clamping screw rod to move downwards until an upper clamping head at the end part of the clamping screw rod is pressed at the edge of the top of the sample; the two L-shaped sliding arms are driven by one guide screw, so that the two L-shaped sliding arms can synchronously move, and the moving distances are the same, so that the clamping screw on the L-shaped sliding arms and the upper clamping head can be symmetrically pressed on a cement block to be tested, and the clamping stress of the cement block is uniform;
when the test is carried out, the hydraulic cylinder acts, the piston rod is driven to drive the pressure applying head assembly to move towards the direction of the sample, when the pressure applying head is contacted with the upper top surface (the suspended part) of the sample, the hydraulic cylinder continues to act, the piston rod is driven to continuously extend, the upper pressure plate can continuously move downwards along the guide rod until the upper pressure plate is pressed on the lower pressure plate, at the moment, the pressure sensor acts, the pressure change value is detected, and the pressure value is transmitted to the controller for analysis and treatment, so that the measurement of the compression resistance and the bending resistance of the cement sample is realized;
meanwhile, clean water can be injected into a test bin of the test box body through the water inlet pipe, so that a cement sample is soaked, and after the soaking is finished, a switch valve on the water outlet pipe is opened, and the wastewater is discharged; then, performing a bending test on the soaked cement; so as to measure the fracture resistance of the soaked cement; after injection, the underwater bending test can be directly carried out, and the actual use environment of the cement block is simulated, so that the test result is more fit with the actual situation.
Further, threaded holes for threaded connection with the guide screw are formed in the L-shaped sliding arms of the two upper clamping units, and the threaded directions of the two threaded holes are opposite.
Further, a plurality of guide rod holes which are arranged right opposite to each other are uniformly distributed on the outer edges of the upper pressing plate and the lower pressing plate respectively; the guide rod is inserted into the guide rod hole, and the upper end and the lower end of the guide rod are respectively connected with the nuts in a threaded manner.
Further, the pressure sensor is mounted on the upper top surface of the lower pressure plate, and the pressure sensor is connected to the controller.
Compared with the prior art, the cement flexural strength measuring equipment disclosed by the utility model has the advantages that the upper clamping component is used for clamping the cement sample to be measured on the stepped positioning seat, so that a plurality of test blocks with standard sizes can be adapted, and in the process of testing, the test blocks can be symmetrically positioned by taking the test point as the center, the clamping stress is uniform, and the center stress of the test point is kept; pressurizing the cement sample by using a pressurizing mechanism, so as to realize a flexural strength measurement test; in the test, clean water can be injected into a test bin of the test box body, and the cement sample is soaked, so that the fracture resistance of the soaked cement can be measured; the bending test can be directly carried out under water; the actual service environment of the cement block is simulated, so that the test result is more fit with the actual test result.
Drawings
Fig. 1 is a schematic overall structure of embodiment 1 of the present utility model.
Fig. 2 is a schematic view showing an installation structure of an upper clamping assembly according to embodiment 1 of the present utility model.
Fig. 3 is a schematic view of the mounting structure of the pressing mechanism of embodiment 1 of the present utility model.
Fig. 4 is a schematic structural view of a pressing head assembly according to embodiment 1 of the present utility model.
The components in the drawings are marked as follows: the device comprises a 1-base, a 2-test box body, a 3-test bin, a 4-stepped positioning seat, a 5-water inlet pipe, a 6-water outlet pipe, a 7-switch valve, an 8-support frame, a 9-upper clamping unit, a 91-L-shaped sliding arm, a 92-clamping screw rod, a 93-clamping hand wheel, a 94-upper clamping head, a 10-guiding screw rod, a 11-guiding shaft, a 12-hand wheel, a 13-portal frame, a 14-hydraulic cylinder, a 15-pressing head assembly, a 151-upper connecting seat, a 152-upper pressure plate, a 153-lower pressure plate, 154-Shi Yatou, 155-guide rods and 156-nuts.
Detailed Description
Example 1:
the apparatus for measuring flexural strength of cement shown in FIGS. 1 to 4 comprises
A base 1;
the test box body 2 is arranged on the base 1; a test bin 3 is arranged in the test box body 2; the bottom of the test bin 3 is provided with a stepped positioning seat 4 for placing a cement sample; the top of one side of the test box body 2 is connected with a water inlet pipe 5; the bottom of the other side of the test box body 2 is connected with a water outlet pipe 6, and a switch valve 7 is arranged on the water outlet pipe 6;
the upper clamping assembly is movably arranged at the top of the test box body 2 through a supporting frame 8; the upper clamping assembly comprises two symmetrically arranged upper clamping units 9, and a guide screw 10 and a guide shaft 11 which are movably connected with the upper clamping units 9; the guide screw 10 and the guide shaft 11 are arranged in parallel front and back; one end of the guide screw 10 is connected with the supporting frame 8, and the other end of the guide screw passes through the supporting frame 8 and is connected with the hand wheel 12; two ends of the guide shaft 11 are fixedly connected with the support frame 8 respectively; the upper clamping unit 9 comprises an L-shaped sliding arm 91 and a clamping screw 92 in threaded connection with the L-shaped sliding arm 91; one end of the L-shaped sliding arm 91 is in threaded connection with the guide screw 10, and the other end of the L-shaped sliding arm is in sliding connection with the guide shaft 11; the clamping screw 92 is arranged perpendicular to the L-shaped sliding arm 91, and a clamping hand wheel 93 is arranged at the upper end of the clamping screw 92; the lower end of the clamping screw 92 passes through the L-shaped sliding arm 91, and the end part of the clamping screw is provided with an upper clamping head 94;
the pressing mechanism is vertically arranged above the test box body 2 through a portal frame 13; the pressure mechanism comprises a hydraulic cylinder 14 and a pressure head assembly 15 connected with a piston rod of the hydraulic cylinder 14; the pressing head assembly 15 sequentially comprises an upper connecting seat 151, an upper pressing plate 152, a lower pressing plate 153 and a pressing head 154 from top to bottom; one side of the upper connecting seat 151, which is away from the lower pressure plate 152, is fixedly connected with a piston rod; the upper pressure plate 152 is integrally fixed below the upper connecting seat 151; the lower pressure plate 153 is movably connected with the upper pressure plate 152 through a guide rod 155 and a nut 156; the pressing head 154 is fixedly arranged below the lower pressing plate 153; a pressure sensor (not shown) is also installed between the upper platen 152 and the lower platen 153;
before the test, placing the cement sample to be tested into a test bin, placing the test bin into a stepped positioning seat, suspending the middle of the cement sample, and attaching two side edges to the inner wall of the stepped positioning seat; the device comprises a positioning seat, a plurality of standard-size test blocks, a plurality of positioning seats and a plurality of positioning seats, wherein the positioning seats are arranged in a stepped manner, and the positioning seats can be adapted to a plurality of standard-size test blocks and can be used for selecting corresponding stepped placement positions according to the sizes of cement samples with different specifications; the upper clamping assembly is used for fixing the sample clamp on the stepped positioning seat, so that the test block can be symmetrically positioned by taking the test point as the center during testing, the clamping stress is uniform, and the stress of the center of the test point is kept; specifically, the hand wheel is rotated to drive the guide screw to rotate, so that the two L-shaped slide arms can relatively move towards the center of the guide screw until the two clamping screws are positioned above the sample; then, adjusting the clamping hand wheel to enable the clamping screw rod to move downwards until an upper clamping head at the end part of the clamping screw rod is pressed at the edge of the top of the sample; the two L-shaped sliding arms are driven by one guide screw, so that the two L-shaped sliding arms can synchronously move, and the moving distances are the same, so that the clamping screw on the L-shaped sliding arms and the upper clamping head can be symmetrically pressed on a cement block to be tested, and the clamping stress of the cement block is uniform;
when the test is carried out, the hydraulic cylinder acts, the piston rod is driven to drive the pressure applying head assembly to move towards the direction of the sample, when the pressure applying head is contacted with the upper top surface of the sample, the hydraulic cylinder continues to act, the piston rod is driven to extend continuously, the upper pressure plate can move downwards continuously along the guide rod until the upper pressure plate is pressed on the lower pressure plate, at the moment, the pressure sensor acts, the pressure change value is detected, and the pressure value is transmitted to the controller for analysis and processing, so that the measurement of the compression resistance and the bending resistance of the cement sample is realized;
meanwhile, clean water can be injected into a test bin of the test box body through the water inlet pipe, so that a cement sample is soaked, and after the soaking is finished, a switch valve on the water outlet pipe is opened, and the wastewater is discharged; then, performing a bending test on the soaked cement; so as to measure the fracture resistance of the soaked cement; after injection, the underwater bending test can be directly carried out, and the actual use environment of the cement block is simulated, so that the test result is more fit with the actual situation.
The two L-shaped slide arms 91 of the upper clamping unit are provided with threaded holes for threaded connection with the guide screw, and the threaded directions of the two threaded holes are opposite. A plurality of guide rod holes which are arranged oppositely are uniformly distributed on the outer edges of the upper pressure plate 152 and the lower pressure plate 153 respectively; the guide rod 155 is inserted into the guide rod hole, and the upper and lower ends of the guide rod 155 are respectively in threaded connection with the nut 156. The pressure sensor is mounted on the upper top surface of the lower pressure plate 153, and is connected to the controller, the pressure sensor is used for detecting pressure change, detecting signals are transmitted to the controller for analysis and processing, and after the pressure signals are processed by the controller, the pressure signals are displayed on a display, so that the pressure sensor is convenient for operators to observe; wherein the pressure sensor may be a strain gauge of the prior art; the controller can be a minimum control unit of a singlechip or a microprocessor minimum system; because the technologies of realizing pressure detection through the pressure sensor, communication between the pressure sensor and the controller, and controlling the display to display the screen by the controller are all the prior art, the specific structure and the working principle thereof are not described in detail.
The above embodiments are merely preferred embodiments of the present utility model, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the utility model are therefore intended to be embraced therein.
Claims (4)
1. A cement flexural strength measuring device is characterized in that: comprising
A base;
the test box body is arranged on the base; a test bin is arranged in the test box body; the bottom of the test bin is provided with a stepped positioning seat for placing a cement sample; the top of one side of the test box body is connected with a water inlet pipe; the bottom of the other side of the test box body is connected with a water outlet pipe, and a switch valve is arranged on the water outlet pipe;
the upper clamping assembly is movably arranged at the top of the test box body through the supporting frame; the upper clamping assembly comprises two symmetrically arranged upper clamping units, and a guide screw and a guide shaft which are movably connected with the upper clamping units; the guide screw and the guide shaft are arranged in parallel front and back; one end of the guide screw rod is connected with the supporting frame, and the other end of the guide screw rod penetrates through the supporting frame and is connected with the hand wheel; two ends of the guide shaft are fixedly connected with the support frame respectively; the upper clamping unit comprises an L-shaped sliding arm and a clamping screw rod in threaded connection with the L-shaped sliding arm; one end of the L-shaped sliding arm is in threaded connection with the guide screw rod, and the other end of the L-shaped sliding arm is in sliding connection with the guide shaft; the clamping screw is perpendicular to the L-shaped sliding arm, and a clamping hand wheel is arranged at the upper end of the clamping screw; the lower end of the clamping screw rod passes through the L-shaped sliding arm, and an upper clamping head is arranged at the end part of the clamping screw rod;
the pressing mechanism is vertically arranged above the test box body through a portal frame; the pressure applying mechanism comprises a hydraulic cylinder and a pressure applying head assembly connected with a piston rod of the hydraulic cylinder; the pressing head assembly sequentially comprises an upper connecting seat, an upper pressing disc, a lower pressing disc and Shi Yatou from top to bottom; one side of the upper connecting seat, which is away from the lower pressing disc, is fixedly connected with the piston rod; the upper pressing plate is integrally fixed below the upper connecting seat; the lower pressure plate is movably connected with the upper pressure plate through a guide rod and a nut; the pressure applying head is fixedly arranged below the lower pressure plate; and a pressure sensor is also arranged between the upper pressure plate and the lower pressure plate.
2. The cement flexural strength testing apparatus according to claim 1, characterized in that: the L-shaped sliding arms of the two upper clamping units are respectively provided with a threaded hole which is in threaded connection with the guide screw, and the threaded directions of the two threaded holes are opposite.
3. The cement flexural strength testing apparatus according to claim 1, characterized in that: the outer edges of the upper pressing disc and the lower pressing disc are respectively and uniformly provided with a plurality of guide rod holes which are arranged right opposite to each other; the guide rod is inserted into the guide rod hole, and the upper end and the lower end of the guide rod are respectively connected with the nuts in a threaded manner.
4. The cement flexural strength testing apparatus according to claim 1, characterized in that: the pressure sensor is arranged on the upper top surface of the lower pressing disc, and is connected to the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322006466.XU CN220542680U (en) | 2023-07-28 | 2023-07-28 | Cement flexural strength measuring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322006466.XU CN220542680U (en) | 2023-07-28 | 2023-07-28 | Cement flexural strength measuring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220542680U true CN220542680U (en) | 2024-02-27 |
Family
ID=89974192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322006466.XU Active CN220542680U (en) | 2023-07-28 | 2023-07-28 | Cement flexural strength measuring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220542680U (en) |
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2023
- 2023-07-28 CN CN202322006466.XU patent/CN220542680U/en active Active
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