CN215415437U - Detection apparatus for pipeline inside lining or outer cement mortar coating that scribbles - Google Patents
Detection apparatus for pipeline inside lining or outer cement mortar coating that scribbles Download PDFInfo
- Publication number
- CN215415437U CN215415437U CN202121895127.6U CN202121895127U CN215415437U CN 215415437 U CN215415437 U CN 215415437U CN 202121895127 U CN202121895127 U CN 202121895127U CN 215415437 U CN215415437 U CN 215415437U
- Authority
- CN
- China
- Prior art keywords
- cement
- mould
- cement mortar
- fastening
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model provides a detection device for a pipeline lining or an outer coating cement mortar coating, which comprises a storage ring, a pin, a fastening bolt, a first fastening screw, a second fastening screw, two cement moulds and a bottom plate, wherein the storage ring is fixedly connected with the pin; the interior of the cement mould is of a hollow structure, bolt holes and positioning pin holes are formed in the side wall of the cement mould, screw holes and positioning pin holes are formed in the top of the cement mould, screw holes are formed in the bottom of the cement mould, the two cement moulds are covered with each other, and a circular cavity is formed in the interior of the cement mould; the fastening bolt penetrates through a bolt hole in the side wall of the cement mould; the bottom plate is fixed at the bottom of the cement mold through second fastening screws, and the containing ring is fixed at the top of the cement mold through pins and first fastening screws. The utility model can accurately measure the one-dimensional expansion rate of cement mortar, realize the accurate comparison of the linear expansion rates of different materials, and simultaneously can simulate the lining cement mortar coating of a pipeline and observe and research the size of cracks of the lining cement mortar and the change relation of the lining cement mortar along with time.
Description
Technical Field
The utility model belongs to the technical field of cement mortar detection, and particularly relates to a detection device for a pipeline lining or an externally-coated cement mortar coating.
Background
The pipeline heat supply history is long, and particularly in the north, the heat supply of the pipeline is frozen in the sky and the ground in winter, so that the pipeline heat supply is an important thing which is related to thousands of households and nationally counted. High-temperature hot water is conveyed by a town heat distribution pipeline, the temperature is generally about 100 ℃, the high-temperature water is generally in direct contact with the inner wall of a metal pipeline, and if the oxygen content in the high-temperature water is higher, the severe corrosion phenomenon occurs. In order to retard the corrosion of the metal pipes, cement mortar is generally lined inside the metal pipes. However, the cement lining of the pipeline generally undergoes drying shrinkage at normal temperature, and a certain expansion amount occurs at high temperature, and if the expansion amount (or shrinkage amount) is not matched with that of the metal pipeline, cracks and falling of the cement may occur, thereby causing serious quality problems. Therefore, it is necessary to accurately measure the linear expansion rate (or shrinkage rate) of cement, and the expansion rate testers of cement mortar on the market and in literature are all the shrinkage or expansion amount of the cement sample in a free state, which is completely different from the actual working condition, and the test result is very inaccurate, so that it is necessary to develop a tester which can accurately measure the one-dimensional expansion rate (or shrinkage rate) of cement mortar by simulating the actual working condition.
Disclosure of Invention
The utility model aims to solve the defects in the prior art, and provides the device for detecting the expansion rate (or shrinkage rate) of cement mortar, which can accurately detect the one-dimensional expansion rate or shrinkage rate of the cement mortar, has a simple structure and is easy to popularize and apply.
The technical scheme adopted by the utility model is as follows: the detection device for the pipeline lining or the outer coating cement mortar coating comprises a storage ring, a pin, a fastening bolt, a first fastening screw, a second fastening screw, two cement molds and a bottom plate; the interior of the cement mould is of a hollow structure, bolt holes and positioning pin holes are formed in the side wall of the cement mould, screw holes and positioning pin holes are formed in the top of the cement mould, screw holes are formed in the bottom of the cement mould, the two cement moulds are covered with each other, and a circular cavity is formed in the interior of the cement mould; the fastening bolt penetrates through a bolt hole in the side wall of the cement mould; the bottom plate is fixed at the bottom of the cement mold through second fastening screws, and the containing ring is fixed at the top of the cement mold through pins and first fastening screws.
Furthermore, a positioning pin penetrates through the middles of the side walls of the two cement molds.
Furthermore, a positioning pit is formed in the bottom plate, the detection device further comprises a circular core rod, a positioning protrusion is arranged at the bottom of the circular core rod, the circular core rod is located in a circular cavity formed by the two cement molds, and the positioning protrusion of the circular core rod is clamped with the positioning pit of the bottom plate.
The beneficial effects obtained by the utility model are as follows: 1. the structure is simple, and the cost is low; 2. the one-dimensional expansion rate of cement mortar can be accurately measured, the accurate comparison of the linear expansion rates of different materials is realized, and meanwhile, the coating of the cement mortar lining of the pipeline can be simulated, and the size of cracks of the cement mortar lining and the change relation of the cracks of the cement mortar lining along with time can be observed and researched; 3. the one-dimensional expansion rate and the one-dimensional shrinkage rate of the cement mortar can be measured.
Drawings
FIG. 1 is an assembly view of the inspection device of the present invention;
FIG. 2 is a front view of the receiving ring of the present invention;
FIG. 3 is a top view of the receiving ring of the present invention;
FIG. 4 is a front view of the base plate of the present invention;
FIG. 5 is a top view of the base plate of the present invention;
FIG. 6 is a perspective view of the cement mold of the present invention;
FIG. 7 is a front view of the cement mold of the present invention;
FIG. 8 is a left side view of the cement mold of the present invention;
FIG. 9 is a top view of the cement mold of the present invention;
FIG. 10 is a schematic view of a round mandrel configuration according to the present invention;
wherein 1 represents a receiving ring, 2 represents a pin, 3 represents a first fastening screw, 4 represents a fastening bolt, 5 represents a cement mold, 6 represents a bottom plate, 7 represents a second fastening screw, 8 represents a positioning pin, and 9 represents a round core rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
As shown in fig. 1-10, the detection device for the pipeline lining or the outer coating cement mortar coating comprises a receiving ring 1, a pin 2, a fastening bolt 4, a first fastening screw 3, a second fastening screw 7, two cement molds 5 and a bottom plate 6; the interior of the cement mould 5 is of a hollow structure, bolt holes and positioning pin holes are formed in the side wall of the cement mould 5, screw holes and positioning pin holes are formed in the top of the cement mould 5, screw holes are formed in the bottom of the cement mould 5, and the two cement moulds 5 are mutually covered and form a circular cavity inside the cement mould; the fastening bolt 4 penetrates through a bolt hole in the side wall of the cement mould 5; the bottom plate 6 is fixed at the bottom of the cement mold 5 through second fastening screws 7, and the receiving ring 1 is fixed at the top of the cement mold 5 through pins 2 and first fastening screws 3. And a positioning pin 8 penetrates through the middle of the side walls of the two cement moulds 5. The bottom plate 6 is provided with a positioning pit, the detection device further comprises a circular core rod 9, a positioning bulge is arranged at the bottom of the circular core rod 9, the circular core rod 9 is positioned in a circular cavity formed by the two cement molds 5, and the positioning bulge of the circular core rod 9 is clamped with the positioning pit of the bottom plate 6.
When the mould is dismantled, the containing ring 1 is dismantled firstly, then the bottom plate 6 is dismantled, and finally the two cement moulds 5 are dismantled and separated. The cement mortar samples were removed and the assembled parts of each tester were cleaned for the next use.
When manufacturing the A-type proportioning cement mortar sample block, firstly, uniformly coating a release agent on the inner surfaces of a cement mold 5, a containing ring 1 and a bottom plate 6 which form a cement sample cavity, merging the two cement molds 5 together after the release agent is dried to form a cylindrical cavity, secondly, inserting two positioning pins 8 into positioning pin holes of the cement mold 5 for positioning, then, penetrating 4 fastening bolts 4 into bolt holes in the cement mold 5, and fastening and fixing by nuts and gaskets;
the bottom plate 6 is installed at a corresponding position in the cement mold 5 and then is firmly fixed by 4 second fastening screws 7;
the testing device with the bottom plate 6 fixed and the cement mould 5 assembled is erected and placed on a horizontal workbench with a flat surface and the levelness not exceeding 0.02, and one side of the bottom plate 6 is arranged below the testing device; and (3) inserting the round core rod 9 into the positioning pit on the bottom plate 6 through the cylindrical cavity of the cement mould 5 to prepare a hollow cement mortar sample and simulate the pipeline lining cement mortar coating.
And adding water into the grouting material, uniformly stirring, immediately grouting into a mold, and grouting from the upper part of the assembly mold. When the height of the grout is about 1/4, the grout is inserted and tamped 6 times by a tamping plate in the circumferential direction of the grout. When the water is filled to about 1/2 and 3/4, the water is inserted and tamped as before, and the air is exhausted to tamp and compact as much as possible. And (4) filling the last layer of grouting material for 3 times until the grouting material overflows from the upper side, and tamping for 8 times.
Slightly smearing the mixture into a plane by using a straight knife, removing redundant slurry, and carefully taking out the round core rod 9 after the cement mortar is cured and molded so as not to damage the molded tubular cement mortar sample;
mounting the receiving ring 1 on the upper part of the assembled cement mould 5, and positioning and fixing by using two pins 2; the receiving ring 1 is then fixed to the cement mould 5 with 4 first fastening pins 3.
Keeping the assembled 3 sets of moulds at the constant temperature of 20 +/-2 ℃ and the constant humidity of 60 +/-2 percent under the standard curing condition, keeping the moisture and curing for 28 days until the required age, taking out 3 sets of moulds, putting the moulds into a 100 ℃ constant temperature water bath box, taking out the moulds after 3 days, measuring the depth reading of a containing ring 1 in the 1 st set of moulds by using a depth micrometer, uniformly measuring 6 depth readings of 9.010mm, 9.013mm, 9.016mm, 9.009mm, 9.012mm and 9.015mm in the containing ring 1, wherein the height of the containing ring 1 is 10mm, the height of a cement mould 5 is 500mm, and calculating the expansion rate of cement mortar by using the following formula;
S＝{[H1-(C1+C2+C3+C4+C5+C6)/6]}/(ΔT*H2)
s-expansion rate or shrinkage rate of cement mortar;
the calculated expansion rate of the cement mortar is 0.0025%/DEG C, and similarly, the detection results of the other two sets of moulds are 0.0021%/DEG C and 0.0028%/DEG C. Meanwhile, the size of the cracks on the inner surface of the cement mortar and the condition of the expansion change of the cement mortar along with time can be regularly observed.
And the test results of the conventional method are shown in table 1 below.
TABLE 1 test results of conventional methods are reported in Table
The traditional method has large fluctuation in the length, width and height directions, inconsistent measurement results and large difference of the test results among parallel samples. The comparison shows that the utility model has accurate test result and good superiority.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. Pipeline inside lining or outer detection device who scribbles cement mortar coating, its characterized in that: the concrete pouring device comprises a containing ring (1), a pin (2), a fastening bolt (4), a first fastening screw (3), a second fastening screw (7), two cement moulds (5) and a bottom plate (6); the interior of the cement mould (5) is of a hollow structure, bolt holes and positioning pin holes are formed in the side wall of the cement mould (5), screw holes and positioning pin holes are formed in the top of the cement mould, screw holes are formed in the bottom of the cement mould, the two cement moulds (5) are mutually covered, and a circular cavity is formed in the interior of the cement mould; the fastening bolt (4) penetrates through a bolt hole in the side wall of the cement mould (5); the bottom plate (6) is fixed at the bottom of the cement mold (5) through a second fastening screw (7), and the containing ring (1) is fixed at the top of the cement mold (5) through a pin (2) and a first fastening screw (3).
2. The apparatus for inspecting the inner lining or outer coating cement mortar of the pipeline according to claim 1, wherein: and a positioning pin (8) penetrates through the middle of the side walls of the two cement moulds (5).
3. The apparatus for inspecting the inner lining or outer coating cement mortar of the pipeline according to claim 1, wherein: the detection device is characterized in that a positioning pit is formed in the bottom plate (6), the detection device further comprises a circular core rod (9), a positioning protrusion is arranged at the bottom of the circular core rod (9), the circular core rod (9) is located in a circular cavity formed by the two cement molds (5), and the positioning protrusion of the circular core rod (9) is clamped with the positioning pit of the bottom plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121895127.6U CN215415437U (en) | 2021-08-13 | 2021-08-13 | Detection apparatus for pipeline inside lining or outer cement mortar coating that scribbles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121895127.6U CN215415437U (en) | 2021-08-13 | 2021-08-13 | Detection apparatus for pipeline inside lining or outer cement mortar coating that scribbles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215415437U true CN215415437U (en) | 2022-01-04 |
Family
ID=79662805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121895127.6U Active CN215415437U (en) | 2021-08-13 | 2021-08-13 | Detection apparatus for pipeline inside lining or outer cement mortar coating that scribbles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215415437U (en) |
-
2021
- 2021-08-13 CN CN202121895127.6U patent/CN215415437U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Torrent | A two-chamber vacuum cell for measuring the coefficient of permeability to air of the concrete cover on site | |
| Mejlhede Jensen et al. | A dilatometer for measuring autogenous deformation in hardening Portland cement paste | |
| CN108593883B (en) | Strain type lateral expansion force testing device and measuring method | |
| CN108693049B (en) | Unsaturated soil evaporation and dehumidification direct shear apparatus and use method thereof | |
| CN207036837U (en) | A kind of sleeve grouting material bleeding rate and vertical expansion ratio measure device | |
| CN103837670A (en) | Method and apparatus for measuring early-stage autogenous shrinkage of cement-based material | |
| CN104155432B (en) | Setting time of cement-based material intelligence assay method | |
| CN203720173U (en) | Device for measuring self-contraction of cement-based material at early age | |
| CN104965063A (en) | Time domain reflection-based detection method for maintenance quality of early-stage concrete | |
| CN111189698B (en) | Device and method for testing internal and external deformation characteristics of anchoring rock body under corrosion creep condition | |
| CN215415437U (en) | Detection apparatus for pipeline inside lining or outer cement mortar coating that scribbles | |
| CN202433369U (en) | Testing device used for detecting slump and expansion degree of concrete | |
| CN110618128B (en) | Test bar for rapidly testing concentration of chloride ions in concrete and preparation method and application thereof | |
| CN113740518A (en) | Detection device and detection method for pipeline lining or outer coating cement mortar coating | |
| CN106969693A (en) | A kind of expansion filling body test block expansion rate determines device | |
| CN209182277U (en) | The quickly electric resistance measuring apparatus of detection asphalt pavement material moisture content | |
| CN109100497B (en) | Method for testing drying shrinkage performance of cement mortar | |
| CN206891901U (en) | Concrete slump test instrument | |
| CN214472903U (en) | Concrete adiabatic temperature rise test mould | |
| CN113390784B (en) | Method for detecting shrinkage performance of slag soil fluidization backfill material | |
| CN113447538A (en) | Common concrete compressive strength capacitance nondestructive testing method | |
| CN109458925B (en) | Dynamic deformation testing method for cement-based material in thermal curing process | |
| CN207703862U (en) | A kind of Mortar shrinkage test stand | |
| CN209803140U (en) | Quick testing arrangement of concrete crack resistance | |
| CN211235866U (en) | Vertical expansibility testing arrangement of mortar is repaired in self-leveling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |