CN2807217Y - Concrete autogenous volume deformation measurer - Google Patents
Concrete autogenous volume deformation measurer Download PDFInfo
- Publication number
- CN2807217Y CN2807217Y CN 200520103088 CN200520103088U CN2807217Y CN 2807217 Y CN2807217 Y CN 2807217Y CN 200520103088 CN200520103088 CN 200520103088 CN 200520103088 U CN200520103088 U CN 200520103088U CN 2807217 Y CN2807217 Y CN 2807217Y
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- Prior art keywords
- sample chamber
- valve
- concrete
- pipe
- differential pressure
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Abstract
The utility model discloses a concrete autogenous volume deformation measurer. A bottle-shaped sample chamber is arranged in an organic glass cylinder, both ends of the bottle-shaped sample chamber are communicated, and a reference tube which has same cross section area is arranged on bottle neck position. The big end of the sample chamber is sealed by a bottom seat, a small hole is arranged on the bottom seat, and a tube is led out of the bottom seat through a first valve, and connected to one end of a differential pressure sensor. A small hole is arranged on the bottom of the reference tube, and a tube is led out of the reference tube through a second valve, and connected to the other end of the differential pressure sensor. A third valve is connected between the two tubes in parallel. Mixed concrete is filled in a rubber film bag, and put in the sample chamber. Water is filled in the sample chamber and the reference tube. When the water is filled, the first and the second valves are closed, and the third valve is opened. After the water is filled, the first and the second valves are opened, and the water level of the reference tube and the sample chamber is automatically regulated to balance. The third valve is closed during the measurement. When the volume of concrete is changed, the water level in the sample chamber is also changed, and the differential pressure sensor is used for measurement. The rise and the fall value of the water level in the sample chamber is calculated by pressure difference value, and the autogenous volume deformation of the concrete is obtained by multiplying the height with the section area of the bottle neck.
Description
Technical field
The utility model relates to measurement mechanism, relates in particular to a kind of concrete autogenous volumetric deformation measuring apparatus.
Background technology
Measure concrete autogenous volumetric deformation at present and have following problem:
1, concrete autogenous volumetric deformation is that the hydration of Binder Materials causes, this hydration begins from the concrete mixing process, because the concrete mix begins to be overall plastic property, the distortion of this moment is often owing to the excessive test error that causes of measuring instrument rigidity is bigger.Given this, China's " concrete for hydraulic structure testing regulations " (SD105-82) stipulates: except that specific (special) requirements is arranged, generally began to measure concrete autogenous volumetric deformation behind the concrete formation in 24 hours.
2, the measurement of autogenous volumetric deformation should keep the waterproof state, and general way is test specimen to be shown wrap the effusion that one deck paraffin is stopped moisture, can not make test specimen be in top-secret state and do in fact like this.
Because the mensuration of concrete autogenous volumetric deformation is the energy measurement early deformation not, can not really keep test specimen waterproof state, causes test figure incorrect.Handsome referring to closing, the research of concrete autogenous volumetric deformation, Chinese water power research institute scientific research collection of thesis, 138-146.
Summary of the invention:
In order to overcome above-mentioned defective, this use is novel to provide a kind of comparatively accurately concrete autogenous volumetric deformation measuring apparatus, this measuring instrument can finish from concrete mixing the measurement of concrete autogenous volumetric deformation, and guarantee that concrete is in the waterproof state in the whole measuring process, thereby guaranteed the accuracy of measuring.
The technical scheme that its technical matters that solves the utility model adopts is:
In columniform organic glass tube, have up-small and down-big, the ampuliform sample chamber that open at two ends, have a tubular at ampuliform sample chamber bottleneck position, the reference pipe that open the upper end, sectional area with reference to pipe is identical with the sectional area of sample chamber bottleneck, the big end of ampuliform sample chamber adds the sealing of O RunddichtringO with base, have an aperture that is communicated with the ampuliform sample chamber on the base, draw after first valve connects an end of differential pressure pick-up with a pipe, have aperture with reference to the pipe bottom, draw after second valve connects the other end of differential pressure pick-up the 3rd valve in parallel between two tubes with another root pipe.
The beneficial effect that the utlity model has is: can measure concrete autogenous volumetric deformation more accurately, this apparatus structure is simple, and is easy to operate.
Description of drawings
Accompanying drawing is a structural principle synoptic diagram of the present utility model.
Among the figure: 1, ampuliform sample chamber, 2, with reference to pipe, 3, the organic glass tube, 4, the O RunddichtringO, 5, base, 6, differential pressure pick-up, 7, valve, 8, valve, 9, valve.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
In columniform organic glass tube 3, have up-small and down-big, the ampuliform sample chamber 1 that open at two ends, have a tubular at ampuliform sample chamber 1 bottleneck position, the reference pipe 2 that open the upper end, sectional area with reference to pipe 2 is identical with the sectional area of sample chamber 1 bottleneck, ampuliform sample chamber 1 big end adds 4 sealings of O RunddichtringO with base 5, have an aperture that is communicated with ampuliform sample chamber 1 on the base 5, draw after first valve 7 connects an end of differential pressure pick-up 6 with a pipe, have aperture with reference to pipe 2 bottoms, draw after second valve 8 connects the other end of differential pressure pick-up 6 the 3rd valve 9 in parallel between two tubes with another root pipe.
Basic functional principle of the present utility model is as follows:
The concrete that mixes and stirs is packed in the good rubber membrane bag of fluid-tight elasticity, put into ampuliform sample chamber 1 then, water filling in the ampuliform sample chamber 1, water level is advisable to be positioned at the bottleneck middle part.Toward injecting water in 2 with reference to managing.In the process of water filling, first valve 7, second valve 8 are closed, and the 3rd valve 9 is opened.After water filling was finished, first valve 7, second valve 8 were opened, and the water level of reference pipe 2 and ampuliform sample chamber 1 automatically adjusts, till balance.When measuring beginning the 3rd valve 9 is closed.When volume of concrete changes, can cause the variation of water level in the ampuliform sample chamber 1, this variation is measured by differential pressure pick-up 6.Can calculate the height that water level rises or descends in the ampuliform sample chamber by pressure difference, with this sectional area that highly multiply by bottleneck, the volume that obtains promptly is concrete autogenous volumetric deformation.
One organic glass right cylinder is processed, as shown in drawings, comprised the sample chamber of an ampuliform and the reference pipe of tubular, its bottom is opening all.The higher precision differential pressure sensor passed through water pipe and sample chamber and linked to each other with bottom with reference to pipe.First valve 7, second valve 8, the 3rd valve 9 are time protection differential pressure pick-ups 6 for water filling, and the 3rd valve 9 has also played and regulated ampuliform sample chamber 1 and with reference to the effect of water levels in the pipe 2 simultaneously.
In order to increase the accuracy of measurement, take following measure:
1, sample chamber adopts the form of variable cross section, i.e. ampuliform, and a tube middle water level is positioned at bottleneck in the process of the test.The body cross section is big, can be so that place the sample of more amount, and bottleneck is little, can change the fluctuation in stage that causes by sensitive more reaction volume.The bottleneck diameter dimension can design according to the concrete autogenous volumetric deformation amount, and purpose is sensitively to react the SEA LEVEL VARIATION that causes because of volume change.
2, the sectional area with reference to pipe is identical with the sectional area of sample chamber bottleneck, can avoid causing test error because of the difference of water evaporation quantity.
Above-mentioned embodiment is used for the utility model of explaining; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.
Claims (1)
1, a kind of concrete autogenous volumetric deformation measuring apparatus, it is characterized in that: in columniform organic glass tube (3), have up-small and down-big, the ampuliform sample chamber (1) that open at two ends, have a tubular at ampuliform sample chamber (1) bottleneck position, the reference pipe (2) that open the upper end, sectional area with reference to pipe (2) is identical with the sectional area of sample chamber (1) bottleneck, the big end of ampuliform sample chamber (1) adds O RunddichtringO (4) sealing with base (5), have an aperture that is communicated with ampuliform sample chamber (1) on the base (5), draw after first valve (7) connects an end of differential pressure pick-up (6) with a pipe, have aperture with reference to pipe (2) bottom, draw after second valve (8) connects the other end of differential pressure pick-up (6) the 3rd valve (9) in parallel between two tubes with another root pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520103088 CN2807217Y (en) | 2005-06-20 | 2005-06-20 | Concrete autogenous volume deformation measurer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520103088 CN2807217Y (en) | 2005-06-20 | 2005-06-20 | Concrete autogenous volume deformation measurer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2807217Y true CN2807217Y (en) | 2006-08-16 |
Family
ID=36921517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520103088 Expired - Fee Related CN2807217Y (en) | 2005-06-20 | 2005-06-20 | Concrete autogenous volume deformation measurer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2807217Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146687A (en) * | 2019-05-21 | 2019-08-20 | 哈尔滨工业大学 | Detection device and method for concrete early deformation under various environment temperatures |
-
2005
- 2005-06-20 CN CN 200520103088 patent/CN2807217Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110146687A (en) * | 2019-05-21 | 2019-08-20 | 哈尔滨工业大学 | Detection device and method for concrete early deformation under various environment temperatures |
| CN110146687B (en) * | 2019-05-21 | 2022-03-01 | 哈尔滨工业大学 | Device and method for detecting early deformation of concrete at various environmental temperatures |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |