Experimental device
By setting up multiple independent test chambers, a mixing tank, and a temperature control device in the experimental setup, the problem of the existing device having only one function was solved, and the switching between freeze-thaw cycle and wet-dry cycle was realized, thus improving the applicability and accuracy of the experiment.
Patent Information
- Application Number
- CN202520113525.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-01-17
AI Technical Summary
The existing experimental setup has a single function mode and cannot conduct freeze-thaw cycle and wet-dry cycle tests at the same time, which limits the applicability of the test.
An experimental device was designed, comprising multiple independent test chambers, multiple independent mixing tanks, and a temperature control device. The control system coordinates the water pump, compressor condenser, and heater to achieve switching between freeze-thaw cycles and wet-dry cycles.
The experimental device has realized multiple experimental function modes, is widely applicable, easy to operate, and accurate in measurement. It can better simulate the actual environment and ensure the accuracy of the experimental results.
Smart Images
Figure CN223955576U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to soil body performance test technical field, especially a kind of experimental device. BACKGROUND
[0002] Freeze-thaw cycle refers to the phenomenon that material or soil repeatedly experiences temperature change in freezing and thawing process, mainly including freezing and thawing process. When temperature drops below freezing point, water in material or soil freezes and expands in volume, which is freezing process. When temperature rises above freezing point, ice melts into water and shrinks in volume, which is thawing process. In freeze-thaw cycle, stress caused by volume expansion of water when it freezes will cause cracks and even structural damage to buildings and pavement materials (such as concrete, masonry, water-stable base, etc.), which seriously affects the service life of materials. Therefore, in cold regions of northern China, freeze-thaw cycle is an important factor that must be considered in engineering design and management.
[0003] Dry-wet cycle test is a test that simulates dry-wet alternating conditions caused by temperature changes, precipitation and evaporation in natural environment, mainly including wetting and drying processes, and is one of the important tests for evaluating the durability and long-term stability of building materials (concrete, bricks, metals, etc.).
[0004] At present, experimental devices are mainly divided into two types: one is an experimental device that can only perform freeze-thaw cycle test, and the other is an experimental device that can only perform dry-wet cycle test.
[0005] In summary, how to solve the problem of single test function mode of existing experimental devices has become a technical problem that technicians in this field urgently need to solve. UTILITY MODEL CONTENT
[0006] Therefore, the utility model provides an experimental device, which has multiple test function modes by setting mutually independent test cavities, multiple independent mixed liquid tanks and temperature control devices.
[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:
[0008] An experimental device comprises:
[0009] A test piece tank has multiple test cavities, each test cavity is provided with a placement structure for placing test pieces, and the placement structure and the test cavity are detachably connected;
[0010] A salt solution tank has a salt storage tank, a salt conveying pipe and multiple mixed liquid tanks. One end of the salt conveying pipe is communicated with the salt storage tank, and the other end is provided with multiple liquid outlet valves in sequence along its extension direction, and each liquid outlet valve is communicated with a corresponding mixed liquid tank.
[0011] a plurality of water pumps, each of the test cavities being communicated with a corresponding mixed liquid tank through a corresponding water pump;
[0012] a temperature control device, the temperature control device comprising a compression condensing machine for refrigerating the test piece and a heater for heating the test piece;
[0013] a control system for controlling the water pumps, the compression condensing machine and the heater to operate.
[0014] Preferably, the placing structure comprises a partition plate, which is detachably arranged in the test cavity and divides the test cavity into an upper test cavity and a lower test cavity in communication with each other.
[0015] A plurality of slots are formed on a side of the partition plate facing the upper test cavity, and the test piece can be clamped into the slots, and the lower test cavity is communicated with the mixed liquid tank through the water pump.
[0016] Preferably, a plurality of partition plates are arranged in the test piece tank.
[0017] The test piece tank is divided into a plurality of test cavities by the partition plates, and the test cavities are provided with openings in the front surface, which are covered by test cavity covers, and the front surface of the test cavity cover is provided with a hand slot, and the back surface of the test cavity cover is connected with the partition plate.
[0018] The partition plate is provided with slide rails on both sides, and the two symmetrically arranged side walls in the test cavity are provided with limiting structures matched with the slide rails, so that the slide rails slide along the limiting structures.
[0019] Preferably, the slide rails are provided with clamping grooves at the ends, and the two symmetrically arranged side walls in the test cavity are further provided with clamping structures matched with the clamping grooves.
[0020] Preferably, the lower test cavity is provided with a temperature sensor and a first salt content sensor, and the temperature sensor and the first salt content sensor are connected with the control system.
[0021] Preferably, a row of air vents are arranged on the side wall of the test cavity, the air inlets of the air vents are communicated with the compression condensing machine, and the air outlets of the air vents are in the same direction as the length direction of the test cavity.
[0022] Preferably, the salt storage tank comprises a chloride salt sub-tank and a sulfate salt sub-tank.
[0023] The salt conveying pipe comprises a first salt conveying pipe and a second salt conveying pipe.
[0024] The first salt conveying pipe is communicated with the chlorinated salt sub-tank at one end, and a plurality of liquid outlet valves are sequentially arranged along the extension direction of the first salt conveying pipe at the other end, and each liquid outlet valve is communicated with a corresponding mixed liquid tank; the second salt conveying pipe is communicated with the sulfate sub-tank at one end, and a plurality of liquid outlet valves are sequentially arranged along the extension direction of the second salt conveying pipe at the other end, and each liquid outlet valve is communicated with a corresponding mixed liquid tank.
[0025] Preferably, a liquid level instrument, a stirring vane and a second salt content sensor are arranged in the mixed liquid tank.
[0026] The liquid level instrument, the stirring vane and the second salt content sensor are connected with the control system.
[0027] Preferably, a weight sensing device is arranged at the bottom of the salt storage tank.
[0028] Preferably, the control system comprises a control panel.
[0029] The control panel acquires information of the water pump, the compression condensing machine and the heater, and controls the water pump, the compression condensing machine and the heater to operate based on and according to the information.
[0030] As can be seen from the above technical solution, the experimental device provided by the present application has multiple test function modes, for example, the different test cavities can be used to simultaneously perform freeze-thaw cycle test and dry-wet cycle test, or the different test cavities can all perform freeze-thaw cycle test, or the different test cavities can all perform dry-wet cycle test, etc., so that the device has wide applicability, and has the characteristics of convenient operation and accurate measurement, etc.; in addition, in different modes, the temperature control device is used to control different temperature parameters, so as to better simulate the actual road environment, and the accuracy of the test results can be greatly ensured. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0032] Figure 1 The experimental device provided by the embodiment of the present application is a three-dimensional structure schematic diagram.
[0033] Figure 2 The experimental device provided by the embodiment of the present application is a three-dimensional structure schematic diagram.
[0034] Figure 3 The structure schematic diagram of the partition plate provided by the embodiment of the utility model.
[0035] The meanings of the various reference numerals in the drawings are as follows:
[0036] 1 is test piece box, 11 is hand groove, 12 is ventilation opening, 13 is partition plate, 131 is slot, 132 is sliding rail, 133 is clamping groove, 14 is temperature sensor, 15 is first salt content sensor;
[0037] 2 is salt solution box, 21 is salt storage tank, 211 is salt inlet, 212 is weight sensing device, 221 is liquid level meter, 222 is stirring fan blade, 223 is liquid inlet pipe, 224 is liquid outlet pipe, 225 is second salt content sensor, 23 is salt conveying pipe, 231 is liquid outlet valve;
[0038] 3 is control system, 31 is control panel, 32 is alarm device;
[0039] 4 is temperature control device, 41 is compression condensing machine, 42 is heater;
[0040] 5 is water pump, 51 is water permeable screen. DETAILED DESCRIPTION
[0041] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0042] The experimental device provided by the embodiment of the utility model is as shown in Figures 1-3 The experimental device provided by the embodiment of the utility model is as shown in
[0043] The test piece box 1 has a plurality of test cavities, each test cavity is provided with a placing structure for placing test pieces, and the placing structure and the test cavity are detachably connected;
[0044] The salt solution box 2 has a salt storage tank 21, a salt conveying pipe 23 and a plurality of mixed liquid tanks 22, the salt conveying pipe 23 is communicated with the salt storage tank 21 at one end, a plurality of liquid outlet valves 231 are sequentially arranged along the extension direction of the salt conveying pipe 23 at the other end, and each liquid outlet valve 231 is communicated with a corresponding mixed liquid tank 22;
[0045] The water pump 5 is provided in a plurality of numbers, and each test cavity is communicated with a corresponding mixed liquid tank 22 through a corresponding water pump 5;
[0046] The temperature control device 4 comprises a compression condensing machine 41 for refrigerating the test piece and a heater 42 for heating the test piece.
[0047] The control system 3 is used for controlling the water pump 5, the compression condensing machine 41 and the heater 42 to operate.
[0048] In the above technical solution, the experimental device can perform freeze-thaw cycle test and dry-wet cycle test under the temperature-salt coupling effect. When the freeze-thaw cycle test is needed, first, the test piece is placed in the corresponding test cavity. Second, the corresponding parameters are input to the control system 3, including the size of each layer of test piece, the salt concentration of the salt solution tank, the freeze-thaw cycle temperature range, the time interval and the number of cycles of each freeze-thaw cycle, etc. Third, the compression condensing machine 41 starts to refrigerate and freeze the test piece. Before the freezing time is about to end, the mixed solution tank 22 prepares the mixed solution needed for the test. After the freezing process is completed, the compression condensing machine 41 stops working, and the heater 42 starts working. The water pump 5 draws the salt solution from the mixed solution tank 22 to the test cavity to start the thawing process. After thawing, the water pump 5 draws the salt solution from the test piece tank 1 back to the mixed solution tank 22 for next use. Fourth, before the next freeze-thaw cycle starts, the test piece is taken out and weighed. The test piece with a mass loss of 5% is stopped in time (i.e., the subsequent freeze-thaw test is stopped). In the above test process, the control system can control the water pump 5, the compression condensing machine 41 and the heater 42 to operate.
[0049] When the dry-wet cycle test is needed, first, the test piece is placed in the corresponding test cavity. Second, the corresponding parameters are input to the control system 3, including the size of each layer of test piece, the salt concentration of the salt solution tank 2, the dry-wet cycle temperature range, the time interval and the number of cycles of each dry-wet cycle, etc. Third, the water pump 5 draws the salt solution from the mixed solution tank 22 to the test piece tank 1. When the salt solution solution immerses all the test pieces, the solution addition is stopped. After the test piece is soaked for a set time, the water pump 5 draws the salt solution from the test piece tank 1 back to the mixed solution tank 22 for next use. The test piece is dried by the heater 42. After the test piece is dried, the heater 42 is turned off. The above second step and third step are repeated for multiple cycles to achieve the number of dry-wet cycle test cycles. As an optimization, the number of cycles is 60-90. In the above test process, the control system can control the water pump 5, the compression condensing machine 41 and the heater 42 to operate.
[0050] In summary, the experimental device has multiple test function modes by setting multiple independent test cavities, multiple independent mixed liquid tanks and the temperature control device 4. The different test cavities can be used to simultaneously perform freeze-thaw cycle test and dry-wet cycle test, or all the test cavities can perform freeze-thaw cycle test, or all the test cavities can perform dry-wet cycle test, etc. Thus, the experimental device has multiple test modes, and has wide applicability, and is easy to operate and accurate in measurement. In addition, in different modes, the temperature control device 4 can control different temperature parameters to better simulate the actual road environment, and can greatly ensure the accuracy of the test results.
[0051] In a possible embodiment, as shown in Figure 2 , the placement structure comprises: a partition plate 13, which is detachably arranged in the test cavity and divides the test cavity into an upper test cavity and a lower test cavity in communication with each other. The partition plate 13 is preferably a mesh structure to ensure the communication between the upper test cavity and the lower test cavity.
[0052] The partition plate 13 has multiple slots 131 on the side facing the upper test cavity, and the test piece can be clamped into the slots 131. The lower test cavity is connected to the mixed liquid tank 22 through the water pump 5. In this technical solution, multiple test pieces can be tested simultaneously, and the test pieces can be replaced after one test to perform the next test. Preferably, the slots 131 are spaced apart by more than 20 mm to facilitate gas flow, and the slots 131 are selected for test pieces of different sizes.
[0053] To optimize the above technical solution, as shown in Figure 1 and Figure 2 , the test piece tank 1 is provided with multiple partition plates.
[0054] The test piece tank 1 is divided into multiple test cavities by the partition plates. The test cavities are provided with openings in the front, and the openings are covered by test cavity covers. The front of the test cavity cover is provided with a hand slot 11, and the back of the test cavity cover is connected to the partition plate 13. Preferably, the connection between the back of the test cavity cover and the partition plate 13 is detachable.
[0055] The partition plate 13 is provided with sliding rails 132 on both sides, and the two symmetrical side walls in the test cavity are provided with limiting structures matched with the sliding rails 132, so that the sliding rails 132 slide along the limiting structures.
[0056] In the above technical solution, the partition plate 13 can slide relative to the sliding rails 132. When the partition plate 13 slides outward to the limit position, the sliding rails 132 and the limiting structures are separated, and the partition plate 13 is detached and replaced with a new one. Preferably, the limiting structure is a sliding groove matched with the sliding rail 132.
[0057] Further optimization of the above technical solutions, such as Figure 3 As shown in the figure, in order to avoid the accidental falling of the partition plate 13 during stretching, the end of the slide rail 132 is provided with a clamping groove 113, and the two symmetrical side walls in the test cavity are also provided with clamping structure matched with the clamping groove 113, and the preferred clamping structure is a groove.
[0058] Optimization of the above technical solutions, such as Figure 1 As shown in the figure, the lower test cavity is provided with a temperature sensor 14 and a first salt sensor 15, both of which are connected with the control system 3, the control system 3 can real-time detect the temperature in the test cavity through the temperature sensor 14, and control the temperature in the test cavity through the heater 42; the first salt sensor 15 is connected with the alarm device 32 of the control system 3, and can real-time monitor the change of salt in the test piece box 1, and timely feedback to the alarm device 32 when the salt concentration changes.
[0059] Optimization of the above technical solutions, such as Figure 2 As shown in the figure, a row of air vents 12 are arranged on the side wall of the test cavity, the air inlet of the air vent 12 is communicated with the compressed condensing machine 41, and the air outlet of the air vent 12 is in the same direction as the length direction of the test cavity, in this technical solution, the compressed condensing machine 41 is used to start refrigeration, and the cold air is conducted through the air vent 12 to freeze the test piece; as preferred, the air vent 12 is provided with a ventilation fan blade; further, the air inlet of the air vent 12 is also communicated with the heater 42, and the hot air is conducted through the air vent 12 to heat and dry the test piece.
[0060] In a possible embodiment, the salt storage tank 21 comprises: a chloride salt sub-tank and a sulfate salt sub-tank, as preferred, the upper part of the chloride salt sub-tank and the sulfate salt sub-tank is provided with a salt inlet 221, which can be used to observe the remaining salt at any time and add salt;
[0061] The salt conveying pipe 23 comprises: a first salt conveying pipe and a second salt conveying pipe;
[0062] One end of the first salt conveying pipe is communicated with the chloride salt sub-tank, and the other end is provided with a plurality of liquid outlet valves 231 along the extension direction in sequence, and each liquid outlet valve 231 is communicated with a corresponding mixed liquid tank 22; one end of the second salt conveying pipe is communicated with the sulfate salt sub-tank, and the other end is provided with a plurality of liquid outlet valves 231 along the extension direction in sequence, and each liquid outlet valve 231 is communicated with a corresponding mixed liquid tank 22.
[0063] In the above technical solution, the liquid outlet valves 231 of the first salt conveying pipe and the second salt conveying pipe can control the single doping or complex doping of the two kinds of salt; it can be understood that the liquid outlet valves 231 are used to convey salt to each layer of mixed liquid tank 22, and the chloride salt sub-tank and the sulfate salt sub-tank are independently arranged and configured with corresponding salt conveying pipes, which can accurately control the composition in the mixed liquid tank 22.
[0064] In a possible embodiment, as shown in Figure 2 The mixing liquid tank 22 is provided with a liquid level meter 221, stirring blades 222 and a second salinity sensor 225.
[0065] The liquid level meter 221, the stirring blades 222 and the second salinity sensor 225 are connected to the control system 3.
[0066] The stirring blades 222 are used to stir the mixing liquid to quickly and uniformly dissolve the salt. The liquid level meter can control the water level in the mixing liquid tank. The second salinity sensor 225 can monitor the salinity concentration in real time. It should be noted that the mixing liquid tank 22 is connected to the liquid inlet pipe 223 and the liquid outlet pipe 224, which can replace the liquid in the tank in time to meet the requirements of different tests and different concentrations. In combination with the liquid level meter 221, the liquid volume in the tank can be controlled to meet the requirements of different test piece sizes.
[0067] In a possible embodiment, as shown in Figure 2 The bottom of the salt storage tank 21 is provided with a weight sensing device 212, which can monitor the change of salt mass to add salt.
[0068] In a possible embodiment, as shown in Figure 2 The control system 3 includes a control panel 31.
[0069] The control panel 31 obtains information of the water pump 5, the compression condensing machine 41 and the heater 42, and controls the operation of the water pump 5, the compression condensing machine 41 and the heater 42 based on and according to the information. It should be noted that the control panel 31 can also collect other information and control the switches of the devices. Preferably, the water pump 5 is provided with a detachable water filter screen 51 at one end connected to the test chamber, which can prevent the test piece residues that are loose and fall off from blocking the pipeline or entering the mixing liquid tank 22.
[0070] In the above technical solution, the control system 3 includes a power supply and electromagnetic valves. The electromagnetic valves are electrically connected to the liquid outlet valve 231, the weight sensing device 212, the liquid level meter 221, the stirring blades 222, the water pump 5, the compression condensing machine 41, the heater 42, the liquid inlet pipe 223 and the liquid outlet pipe 224 to control the above components.
[0071] In a possible embodiment, the material of the test piece tank 1 is a heat-insulating and low-temperature-resistant material.
[0072] In a possible embodiment, when the experiment (freeze-thaw cycle or dry-wet cycle) is carried out, the common size of the test piece is a cylinder with a size of 50*50, 100*100, or 150*150 mm. Different sizes of test pieces can be subjected to freeze-thaw cycles in different test cavities at the same time, and the required water level is different. The amount of salt solution entering the test cavity is controlled to ensure that the water level is 20 mm higher than the test piece during water melting according to the specification. In this way, the use of water and salt can be maximized, and unnecessary waste can be reduced.
[0073] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown in the drawings alone can be combined with each other arbitrarily, as long as the combined technical features are not contradictory to each other. All feasible combinations of features are explicitly described herein. Any one of the multiple sub-features included in the same sentence can be applied independently, and does not have to be applied together with other sub-features.
[0074] The present application will be further described below in conjunction with specific embodiments:
[0075] In an embodiment, multiple test spaces (i.e., test cavities) are realized by layering, the fan blades in the ventilation opening 12 are used to realize rapid refrigeration and heat conduction, and the uniformity of heating and cooling of the test piece is ensured; the test piece can be fixed and placed through the mesh-type partition plate 13, and the test piece falling off during the test can flow out through the mesh opening, facilitating collection and cleaning; the test piece is placed or taken out more conveniently through the transverse sliding rail 132, and the partition plate 13 is prevented from falling off through the clamping groove 133; the temperature sensor 14 and the first salt content sensor 15 can monitor the temperature and salt content changes in the test box in real time, and the loss of salt content during the freeze-thaw or dry-wet cycle of the salt solution is avoided through timely feedback of the alarm device 32.
[0076] In another embodiment, the weight sensing device 212 can weigh different amounts of salt, the salt content of each layer is controlled through the salt conveying pipe 23 and the valve of each layer, the liquid level instrument 221 can control the water level in the mixed liquid tank 22, the stirring fan 22 is started after the experimental requirements are met, so that the salt is completely dissolved, and the second salt content sensor 225 can monitor the concentration in real time. When the test piece box needs to be water-melted or moistened, the water pump 5 is started, and the salt solution of each layer is conveyed to the corresponding layer position; after the melting or moistening is completed, the water pump 5 sends the salt solution in the test piece box back to the mixed liquid tank for subsequent use; the compression condensing machine 41 and the heater 42 are alternately turned on, the compression condensing machine is started to refrigerate when freezing or low-temperature moistening is required, and the heater is turned on to heat when melting or drying is required.
[0077] In another embodiment, the test specimen box 1 is divided into three layers of test cavities, each layer is provided with a hand slot 11 on the outside, and a ventilation opening 12 is provided above the highest liquid level on the inside, a fan is provided in the ventilation opening 12 to accelerate air circulation, a partition 13 is provided in the middle and lower part of each layer, the partition 13 is provided with a slot 131, the slots 131 are spaced apart by more than 20mm to facilitate gas circulation, a sliding rail 132 is provided on both sides of the partition 13, and a clamping groove 133 is located at the tail of the sliding rail 132 to prevent the partition 13 from accidentally falling off during stretching. The uppermost layer of the salt solution tank 2 is a salt storage tank 21, an open salt inlet 211 is provided above the salt storage tank 21, a weight sensing device 212 is provided at the bottom of the salt storage tank 21, and a mixed liquid tank 22 is provided below the salt storage tank 21. The mixed liquid tank 22 is divided into three layers corresponding to the three layers of the test specimen box 1, the salt storage tank 21 and the mixed liquid tank 22 are connected by a salt conveying pipe 23, and a liquid outlet valve 231 is provided in each layer of the salt conveying pipe 23. The salt conveying pipe 23 transports salt to each layer of the mixed liquid tank 22 to achieve different salt concentrations in each layer of the mixed liquid tank 22. The mixed liquid tank 22 is provided with a liquid level instrument 221, a stirring fan 222, a second salt content sensor 225, a liquid inlet pipe 223 and a liquid outlet pipe 224. The liquid level instrument 221 can feedback the liquid volume in the mixed liquid tank 22 in real time. Each layer between the mixed liquid tank 22 and the test specimen box 1 is connected by a water pump 5. The control system 3 includes a power supply, an electromagnetic valve, an alarm device 32 and a control panel 31. The power supply connects all electrical devices to provide power for the entire instrument. The temperature control system 4 is composed of a compression condensing machine 41 and a heater 42, which is used to change the temperature in the test specimen box 1 at different stages of the test. The electromagnetic valve of the control system 3 is electrically connected to the liquid outlet valve 231, the weight sensing device 212, the liquid level instrument 221, the stirring fan 222, the water pump 5, the compression condensing machine 41, the heater 42, the liquid inlet pipe 223 and the liquid outlet pipe 224. The control panel 31 of the control system 3 collects information to control the switching of each device. In addition, the volume of the mixed liquid tank 2 is greater than the volume of the mixed liquid required when melting in the test specimen box. The stirring fan 222 can be a fan-shaped stirring rod.
[0078] In a specific embodiment, the freeze-thaw cycle test steps are as follows: first, pull out part of the partition 13 through the hand slot 11, replace the partition 13 with different types of slots according to the size of the test specimen, place the test specimen in the slot 131 above each layer of the partition 13, and then push the partition 13 back into the test specimen box 1;
[0079] Second, add the required salt into the salt storage tank 21 through the salt inlet 211 in advance, input the required test parameters on the control panel interface, including the size of each layer of test specimen, salt concentration, freeze-thaw cycle temperature range, cycle time interval and cycle number;
[0080] Third step, start the test device, compression condensing machine 41 starts refrigeration, through the ventilation opening 12 conduction cold air to the test piece freezing; freeze time will end, the system according to each layer in advance set salt concentration calculation required salt and water volume, open liquid inlet pipe 223 water, liquid level instrument 221 sense volume change feedback solenoid valve control liquid inlet pipe 223, open the valve 231 of salt delivery pipe 23, the salt is sent into each layer, weight sensing device 212 monitor salt mass change, meet the requirements after feedback solenoid valve closes liquid valve 231, then the stirring fan blade 222 starts, according to the same direction high frequency stirring until completely dissolved; freeze process ends, compression condensing machine 41 stops working, heater 42 starts, water pump 5 from the mixed liquid tank 22 draws salt solution to the test piece tank 1 to start the melting process; melting ends, that is, the freeze-thaw cycle ends, water pump 5 from the test piece tank 1 draws salt solution back to the mixed liquid tank 22 for next use;
[0081] Fourth step, before the next freeze-thaw cycle starts, there is enough time to take out the test piece on the slot 131 and weigh it, the removal step is the same as the first step, the test piece with quality loss exceeding the specification can be stopped in time.
[0082] It should be noted that the dry-wet cycle test process operation steps are similar to the freeze-thaw cycle test, which will not be repeated here.
[0083] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between various embodiments can be referred to each other.
[0084] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An experimental apparatus, characterized in that, The utility model relates to a test piece box, a salt solution box and a control system, and belongs to the field of test piece test. The test piece box has a plurality of test cavities, each of which is provided with a placing structure for placing a test piece, and the placing structure is detachably connected with the test cavity; The salt solution box has a salt storage tank, a salt conveying pipe and a plurality of mixed liquid tanks, one end of the salt conveying pipe is communicated with the salt storage tank, the other end of the salt conveying pipe is provided with a plurality of liquid outlet valves in sequence along the extension direction of the salt conveying pipe, and each liquid outlet valve is communicated with a corresponding mixed liquid tank; The water pump is provided in a plurality of numbers, and each test cavity is communicated with a corresponding mixed liquid tank through a corresponding water pump; The temperature control device includes a compression condenser and a heater, the compression condenser is used for refrigerating the test piece, and the heater is used for heating the test piece; The control system is used for controlling the operation of the water pump, the compression condenser and the heater.
2. The experimental setup of claim 1, wherein, The placing structure includes a partition plate, the partition plate is detachably arranged in the test cavity and divides the test cavity into an upper test cavity and a lower test cavity in communication with each other; The partition plate is provided with a plurality of grooves on the side facing the upper test cavity, the test piece can be clamped into the grooves, and the lower test cavity is communicated with the mixed liquid tank through the water pump.
3. The experimental set-up of claim 2, wherein, The test piece box is provided with a plurality of partition plates; The test piece box is divided into a plurality of test cavities by the partition plates, the front of the test cavity is provided with an opening, the opening is covered with a test cavity cover, the front of the test cavity cover is provided with a hand groove, and the back of the test cavity cover is connected with the partition plate; The two sides of the partition plate are provided with sliding rails, and the two symmetrically arranged side walls in the test cavity are provided with limiting structures matched with the sliding rails, so that the sliding rails slide along the limiting structures.
4. The experimental setup of claim 3, wherein, The end of the sliding rail is provided with a clamping groove, and the two symmetrically arranged side walls in the test cavity are further provided with clamping structures matched with the clamping groove.
5. The experimental setup of claim 2, wherein, The lower test cavity is provided with a temperature sensor and a first salt content sensor, and the temperature sensor and the first salt content sensor are connected with the control system.
6. The experimental setup of claim 2, wherein, A row of air vents is arranged on the side wall of the test cavity, the air inlet of the air vent is communicated with the compression condenser, and the air outlet of the air vent is in the same direction as the length direction of the test cavity.
7. The experimental setup of claim 1, wherein, The salt storage tank includes a chloride salt sub-tank and a sulfate salt sub-tank; The salt conveying pipe includes a first salt conveying pipe and a second salt conveying pipe; The first salt conveying pipe is communicated with the chloride salt sub-tank at one end and is provided with a plurality of liquid outlet valves (231) along its extension direction at the other end, and each liquid outlet valve (231) is communicated with a corresponding mixed liquid tank (22); the second salt conveying pipe is communicated with the sulfate salt sub-tank at one end and is provided with a plurality of liquid outlet valves (231) along its extension direction at the other end, and each liquid outlet valve (231) is communicated with a corresponding mixed liquid tank (22).
8. The experimental setup of claim 1, wherein, The mixed liquid tank (22) is provided with a liquid level instrument (221), a stirring blade (222) and a second salt content sensor (225); The liquid level instrument (221), the stirring blade (222) and the second salt content sensor (225) are connected with the control system (3).
9. The experimental setup of claim 1, wherein, The salt storage tank (21) is provided with a weight sensing device (212) at the bottom.
10. The experimental setup of any one of claims 1-9, wherein, The control system (3) comprises a control panel (31); The control panel (31) acquires information of the water pump (5), the compression condensing machine (41) and the heater (42), and controls the water pump (5), the compression condensing machine (41) and the heater (42) to operate based on and according to the information.