CN202720205U - Novel concrete quick freezing and thawing test device - Google Patents
Novel concrete quick freezing and thawing test device Download PDFInfo
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- CN202720205U CN202720205U CN 201220364229 CN201220364229U CN202720205U CN 202720205 U CN202720205 U CN 202720205U CN 201220364229 CN201220364229 CN 201220364229 CN 201220364229 U CN201220364229 U CN 201220364229U CN 202720205 U CN202720205 U CN 202720205U
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Abstract
The utility model provides a novel concrete quick freezing and thawing test device which comprises a cold-heat exchange unit, a test box and a control device, and the control device is respectively connected with the cold-heat exchange unit and a test sample box. The novel concrete quick freezing and thawing test device solves the technical problems that an existing test device is low in work efficiency and high in work energy consumption, a heating component is easy to damage due to long-term heating, and operation is inconvenient. Heat exchanging of the cold-heat exchange unit is utilized to achieve the purpose that the temperature of a concrete sample rises, work efficiency is high, work energy consumption is little, and the problem that an electric heating component is easy to damage is solved. Advanced technology is used to match with a color liquid crystal display screen, an embedded type printer and other components to achieve the purpose of intelligent operation.
Description
Technical field
The utility model relates to a kind of concrete test device, is specifically related to a kind of new concrete fast freeze-thaw test device.
Background technology
At cold district, freeze injury of concrete is to affect concrete durability, causes one of too early topmost reason of destroying of building, road and bridge.The northern area of China all is in lower temperature environment winter, it is very serious that road surface, bridge, river, ocean platform and high-rise are destroyed by freeze injury, such as the Cooling Tower Wall of the peaceful highway in bridge, Heilongjiang Province of Delingha-sky fine horse and Xizhimen, Beijing viaduct, generating plant, Tongliao etc. all suffers freeze-thaw damage, the phenomenons such as abrasion, hollowing occurs.Because the freeze thawing phenomenon is serious to concrete destruction, a lot of countries that comprise China have all formulated standard concrete frost resistance are estimated and controlled.
China's method for testing dough recovery the earliest is " Standard for test methods of longterm performance and durability of ordinary concrete " (GB/T82-85) the middle method of freezing slowly and quick-freeze method of formulating, is updated to " Standard for test methods of longterm performance and durability of ordinary concrete " (GB/T50082-2009) before this standard mesh.And＜ASTM C66697 be the test method of the concrete fast freeze-thaw recommended of American Society for testing and materials, be divided into two kinds of methods of A and B, respectively with China standard in the quick-freeze method with to freeze slowly method similar.
In new GB, the quick-freeze method is that concrete sample is under the Rapid Circulation state that water freezes aqueous fusion, estimate the frost resistance of concrete sample, in the test of quick-freeze method, the single cycle temperature drops to (18 ± 2 ℃) from (5 ± 2 ℃), intensification is completed in 2h～4h from (18 ± 2 ℃) to (5 ± 2 ℃).Test is carried out reaching 5% until the cycle index of stipulating or concrete sample dynamic modulus of elasticity are reduced to the mass loss rate of 60% or test specimen of initial value continuously.
Utility model patent " concrete fast freeze-thaw test device " (ZL 97200590.0) is that a kind of early stage concrete quick-freeze method of utilizing is estimated the device of concrete antifreezing performance, this device utilizes electrically heated rod or electrical heating valve to reach the purpose that concrete sample heats up, work efficiency is low, the work energy consumption is larger, and the heater block long-time heating is easily damaged; Due to the research and development time early, electric control gear can't reach the purpose of intelligence operation.
The utility model content
In order to solve existing test unit inefficiency, the work energy consumption is larger, the technical matters of the easy damage of heater block long-time heating and inconvenient operation, and the utility model provides a kind of new concrete fast freeze-thaw test device.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of new concrete fast freeze-thaw test device, described test unit comprises cold-heat exchanger group, chamber and control device, described control device is connected with the test specimen case with the cold-heat exchanger group respectively.
As further improvement in the technical proposal, described cold-heat exchanger group inside comprises refrigeration compressor, the air-cooled condenser that is communicated with refrigeration compressor, the plate type heat exchanger that is communicated with refrigeration compressor; Be provided with four-way valve between described refrigeration compressor and air-cooled condenser and plate type heat exchanger, be provided with oil-liquid separator between described cold-heat exchanger group and four-way valve; Described cold-heat exchanger group inside also comprises pressure protective device, the first fluid reservoir, the second fluid reservoir, be arranged at the first via by-pass valve control between plate type heat exchanger and the first fluid reservoir, be arranged at the second road by-pass valve control between air-cooled condenser and the second fluid reservoir, be arranged at the hot and cold water self-suction circulation pump between chamber and plate type heat exchanger; Be provided with high-pressure mouth and low pressure port on described refrigeration compressor; Described pressure protective device is connected on high-pressure mouth and low pressure port.
As further improvement in the technical proposal, described chamber comprises the casing that is connected with the test specimen case with the cold-heat exchanger group.
As further improvement in the technical proposal, be provided with temperature measuring equipment, industrial computer, color touch liquid crystal display, embedded printer, relay indicating light, switch and alarm lamp on described control device.
As further improvement in the technical proposal, be provided with the first port and the second port on described plate type heat exchanger.
As further improvement in the technical proposal, described first via by-pass valve control is comprised of expansion valve, retaining valve and filtrator;
As further improvement in the technical proposal, described the second road by-pass valve control is comprised of retaining valve and filtrator.
Implement a kind of new concrete fast freeze-thaw test device of the present utility model, have following beneficial effect:
1. this device utilizes the heat interchange of cold-heat exchanger group to reach the purpose that concrete sample heats up, and work efficiency is higher, and the work energy consumption is less, has effectively avoided the problem of electric heating element rapid wear;
2. this device adopts advanced technology in conjunction with chromatic liquid crystal screen and embedded printer and other parts, reaches the purpose of intelligence operation.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Refrigerant flow direction schematic diagram when Fig. 2 is refrigeration of the present utility model;
Refrigerant flow direction schematic diagram when Fig. 3 is heating of the present utility model.
Embodiment:
As shown in Figure 1, new concrete fast freeze-thaw test device described in the utility model comprises cold-heat exchanger group 1, chamber 2 and control device 3.Cold-heat exchanger group 1 inside comprises refrigeration compressor 101, air-cooled condenser 102, plate type heat exchanger 103, be provided with the first port 1031 and the second port one 032 on this plate type heat exchanger 103), oil-liquid separator 104, pressure protective device 105, four-way valve 106, the first fluid reservoir 107, the second fluid reservoir 108, first via by-pass valve control 10, this first via by-pass valve control 10 comprises expansion valve 109, retaining valve 110 and filtrator 111, the the second road by-pass valve control 11, this second road by-pass valve control 11 comprises retaining valve 112 and filtrator 113; Hot and cold water self-suction circulation pump 114; Pressure protective device 105 is connected on the high-pressure mouth 1011 and low pressure port 1012 of refrigeration compressor 101; this unit utilizes refrigeration compressor to control the physical state of cold-producing medium; utilize four-way valve 106 to switch different pipe path; utilize the high and low pressure environment of plate type heat exchanger 103 to make refrigerants vaporize or liquefaction; heat absorption phenomenon when utilizing vaporization; make the heat transfer medium that closes in plate type heat exchanger 103 in pipe path---the anti freezing solution cooling; exothermic phenomenon when utilizing liquefaction heats up anti freezing solution.The duty of monitoring refrigeration compressor 101 also feeds back to industrial computer 302 in control device 3, adjusts duties by industrial computer 302, and opertaing device normally moves.Chamber 2 comprises casing 201, chamber is comprised of casing and pipe path, be provided with test-piece stand in casing, be used for fixing standard compliant rubber test specimen box, during test, put into concrete test block and injected water in rubber test specimen box, add heat transfer medium---anti freezing solution in chamber, anti freezing solution passes in and out plate type heat exchanger under the effect of hot and cold water self-suction circulation pump, with the cold-producing medium generation heat interchange that closes in pipe path, thereby reach the purpose of freezing and heating in chamber.Control device 3 comprises temperature measuring equipment 301, industrial computer 302, color touch liquid crystal display 303, embedded printer 304, relay indicating light 305, switch 306 and alarm lamp 307.Switch 306 is controlled the startup of equipment set and stops.After opening, the user utilizes color touch liquid crystal display 303 to assign user instruction to industrial computer 302, and parameters shows data and freeze thawing curve.Temperature measuring equipment 301 is placed on casing 201 inside of chamber 2, the temperature of test block and feed back to industrial computer 302 in the watch-dog operational process, and industrial computer 302 determines according to temperature equipment is taked which kind of mode of operation (heating or refrigeration).Embedded printer 304 is according to instruction real time print operational data or the historical data of industrial computer 302.Relay indicating light 305 display devices are in heating or refrigeration mode.Alarm lamp 307 is accepted the instruction of industrial computer 302, reports to the police in abnormal situation in working order.
As shown in Figure 2, in the time of need to be to casing 201 internal refrigeration storage of test specimen case 2, cold-producing medium be along arrow direction in figure.control device 3 is controlled four-way valve 106 and is connected corresponding pipe path, cold-producing medium goes out from refrigeration compressor 101 high pressure port 1011, flow to air-cooled condenser 102 through four- way valve 106, 102 pairs of ducted cold-producing mediums of air-cooled condenser (being in the state of High Temperature High Pressure this moment) are lowered the temperature, cold-producing medium is liquefied as liquid gradually, enter the first fluid reservoir 107, through the filtrator 111 in first via by-pass valve control, expansion valve 109, retaining valve 110 enters in plate type heat exchanger 103, these timed unit 3 control four-way valves 106 switch to plate type heat exchanger 103 first ports 1031 and are communicated with refrigeration compressor 101 low pressure ports 1012 through four-way valve 106, under refrigeration compressor 101 effects and under the control of first via by-pass valve control, refrigeration piping in plate type heat exchanger 103 is in low-pressure state, cold-producing medium enters plate type heat exchanger 103 from the second port one 032, be vaporizated into gaseous state, absorb amount of heat, make the anti freezing solution temperature fast cooling that closes in sealing pipeline, under the effect of hot and cold water self-suction circulation pump 114, the anti freezing solution that has changed low temperature into enters test specimen case 2, concrete sample temperature in casing 201 is reduced, reach the effect of refrigeration, and in plate type heat exchanger 103, the cold-producing medium of volatilization flows out from the first port 1031, enter refrigeration compressor 101 by four-way valve 106 and refrigeration compressor 101 low pressure ports 1012, continue the work that comes and goes after high pressure compressed, thereby complete whole process of refrigerastion.When need to heat the test specimen case, cold-producing medium is along arrow direction in figure.control device 3 is controlled four-way valve 106 and is connected corresponding pipe path, cold-producing medium goes out from refrigeration compressor 101 high pressure port 1011, enter plate type heat exchanger 103 through four-way valve 106 by plate type heat exchanger 103 first ports 1031, under High Pressure, the refrigerant liquid of gaseous state changes into liquid state and emits amount of heat, the anti freezing solution temperature of closing in sealing pipeline is rapidly heated, under the effect of hot and cold water self-suction circulation pump 114, the anti freezing solution that has changed high temperature into enters test specimen case 2, concrete sample temperature in casing 201 is raise, reach the effect of heating, and in plate type heat exchanger 103, the cold-producing medium of condensation flows out from the second port one 032, enter the second fluid reservoir 108, enter air-cooled condenser 102 through filter 113 and retaining valve 112 subsequently, get back to refrigeration compressor 101 by four-way valve 106 and refrigeration compressor 101 low pressure ports 1012, continue the work that comes and goes after high pressure compressed, thereby complete whole heating process.
Claims (7)
1. new concrete fast freeze-thaw test device, it is characterized in that: described test unit comprises cold-heat exchanger group (1), chamber (2) and control device (3), and described control device (3) is connected 3 with cold-heat exchanger group (1) with the test specimen case respectively) be connected.
2. new concrete fast freeze-thaw test device according to claim 1, it is characterized in that: described cold-heat exchanger group (1) inside comprises refrigeration compressor (101), the air-cooled condenser (102) that is communicated with refrigeration compressor (101), the plate type heat exchanger (103) that is communicated with refrigeration compressor (101); Be provided with four-way valve (106) between described refrigeration compressor (101) and air-cooled condenser (102) and plate type heat exchanger (103), be provided with oil-liquid separator (104) between described cold-heat exchanger group (1) and four-way valve (106);
Described cold-heat exchanger group (1) inside also comprises pressure protective device (105), the first fluid reservoir (107), the second fluid reservoir (108), be arranged at the first via by-pass valve control (10) between plate type heat exchanger (103) and the first fluid reservoir (107), be arranged at the second road by-pass valve control (11) between air-cooled condenser (102) and the second fluid reservoir (108), be arranged at the hot and cold water self-suction circulation pump (114) between chamber (2) and plate type heat exchanger (103);
Be provided with high-pressure mouth (1011) and low pressure port (1012) on described refrigeration compressor (101); Described pressure protective device (105) is connected on high-pressure mouth (1011) and low pressure port (1012).
3. new concrete fast freeze-thaw test device according to claim 2, it is characterized in that: described chamber (2) comprises with cold-heat exchanger group (1) is connected 3 with the test specimen case) casing (201) that is connected.
4. new concrete fast freeze-thaw test device according to claim 3, is characterized in that: be provided with temperature measuring equipment (301), industrial computer (302), color touch liquid crystal display (303), embedded printer (304), relay indicating light (305), switch (306) and alarm lamp (307) on described control device (3).
5. new concrete fast freeze-thaw test device according to claim 4, is characterized in that: be provided with the first port (1031) and the second port (1032) on described plate type heat exchanger (103).
6. new concrete fast freeze-thaw test device according to claim 5, it is characterized in that: described first via by-pass valve control (10) is comprised of expansion valve (109), retaining valve (110) and filtrator (111).
7. new concrete fast freeze-thaw test device according to claim 6, it is characterized in that: described the second road by-pass valve control (11) is comprised of retaining valve (112) and filtrator (113).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220364229 CN202720205U (en) | 2012-07-26 | 2012-07-26 | Novel concrete quick freezing and thawing test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220364229 CN202720205U (en) | 2012-07-26 | 2012-07-26 | Novel concrete quick freezing and thawing test device |
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| CN202720205U true CN202720205U (en) | 2013-02-06 |
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| CN 201220364229 Expired - Fee Related CN202720205U (en) | 2012-07-26 | 2012-07-26 | Novel concrete quick freezing and thawing test device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964994A (en) * | 2015-07-16 | 2015-10-07 | 中国水利水电科学研究院 | Two-box asynchronous concrete freezing-thawing test device and test method |
| CN106526146A (en) * | 2016-11-22 | 2017-03-22 | 河海大学 | Evaluation method of freezing resistance of concrete |
| CN107515232A (en) * | 2017-10-23 | 2017-12-26 | 许昌学院 | A kind of roadbed freezing and thawing circulating test device |
| CN110082284A (en) * | 2019-04-09 | 2019-08-02 | 中水北方勘测设计研究有限责任公司 | A kind of system and method for adjustable ice layer thickness and progress avalanche test |
| CN110424377A (en) * | 2019-08-21 | 2019-11-08 | 东北大学 | A kind of anti-freeze-thaw damage stake of intelligent temperature control |
| CN113466286A (en) * | 2021-06-30 | 2021-10-01 | 中国科学院西北生态环境资源研究院 | Freeze-thaw test equipment for simulating concrete ultralow-temperature-large-temperature-difference freeze-thaw process |
-
2012
- 2012-07-26 CN CN 201220364229 patent/CN202720205U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104964994A (en) * | 2015-07-16 | 2015-10-07 | 中国水利水电科学研究院 | Two-box asynchronous concrete freezing-thawing test device and test method |
| CN104964994B (en) * | 2015-07-16 | 2018-07-20 | 中国水利水电科学研究院 | Double case asynchronous system concrete freezing-thawing test devices and test method |
| CN106526146A (en) * | 2016-11-22 | 2017-03-22 | 河海大学 | Evaluation method of freezing resistance of concrete |
| CN107515232A (en) * | 2017-10-23 | 2017-12-26 | 许昌学院 | A kind of roadbed freezing and thawing circulating test device |
| CN110082284A (en) * | 2019-04-09 | 2019-08-02 | 中水北方勘测设计研究有限责任公司 | A kind of system and method for adjustable ice layer thickness and progress avalanche test |
| CN110082284B (en) * | 2019-04-09 | 2021-06-25 | 中水北方勘测设计研究有限责任公司 | System and method capable of adjusting ice layer thickness and performing collapse test |
| CN110424377A (en) * | 2019-08-21 | 2019-11-08 | 东北大学 | A kind of anti-freeze-thaw damage stake of intelligent temperature control |
| CN113466286A (en) * | 2021-06-30 | 2021-10-01 | 中国科学院西北生态环境资源研究院 | Freeze-thaw test equipment for simulating concrete ultralow-temperature-large-temperature-difference freeze-thaw process |
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| DD01 | Delivery of document by public notice |
Addressee: Chen Qingli Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| EXPY | Termination of patent right or utility model |