Concrete chloride ion diffusion resistance simulation test equipment and method

Abstract

The invention relates to the technical field of concrete durability testing, and discloses a concrete chloride ion diffusion resistance simulation test device and a concrete chloride ion diffusion resistance simulation test method. Comprising a supporting platform, a height adjusting mechanism, a synchronous driving mechanism, a pressing and covering platform, a test cavity construction mechanism, an auxiliary adjusting mechanism, a liquid guiding mechanism and a data monitoring mechanism. The test chamber formed between the test cavity construction mechanism and the test piece can be adjusted through the auxiliary adjusting mechanism, the pressure intensity and the solution concentration in the test chamber can be stably adjusted in the test process, and compared with a mode of continuously introducing a large amount of solution to adjust the pressure, the loss amount of the chlorine-containing solution can be effectively reduced, and the test efficiency is improved. And the stability of the liquid in the test chamber can be effectively improved, the influence of turbulent flow generated when the chlorine-containing solution is introduced again on the test is effectively reduced, and the accuracy of test parameters is improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete durability testing, and more specifically, to a concrete chloride ion diffusion resistance simulation test device and method. Background Art

[0002] my country has a long coastline and widespread saline soil areas. A large amount of reinforced concrete is subjected to severe chloride-salt environmental erosion, which leads to corrosion of the steel bars inside the structure and reduced durability. Therefore, the penetration and diffusion of chloride ions is a top priority in research. However, due to the limitations of experimental conditions, the test conditions cannot meet the on-site working conditions well, and the research results have large errors, which is very unfavorable for the correct evaluation or assessment of the safety and life cycle of the project.

[0003] Currently, the commonly used test conditions mainly adopt natural penetration, which cannot fully simulate the physical field or stress field conditions at the engineering site and has a large error.

[0004] The existing simulated test equipment uses a sealed cover of fixed volume to tightly cover the surface of the concrete test block, and introduces a set amount of chlorine-containing solution to form a test environment with a set pressure. However, since the volume in the cavity is fixed, the concentration of the internal solution will also change under different pressure conditions, so it is necessary to configure the concentration of the chlorine-containing solution according to the pressure setting value. During the test, as the chloride ions penetrate, the solution concentration changes, which affects the pressure change. The chlorine-containing solution needs to be re-introduced for adjustment, which can easily cause the concentration of the chlorine-containing solution to change. The actual calculation and configuration of the introduced liquid concentration are also required, which not only consumes more chlorine-containing solution, but is also more cumbersome and costly. Summary of the invention

[0005] The purpose of the present invention is to provide a concrete chloride ion diffusion resistance simulation test device and method in order to solve the above problems.

[0006] The present invention provides a concrete chloride ion diffusion resistance simulation test device, comprising a support platform, a height adjustment mechanism movably connected to the support platform, a synchronous driving mechanism arranged on the support platform, a pressing platform threadedly connected to the height adjustment mechanism, a test cavity construction mechanism fixedly connected to the middle position of the upper end of the pressing platform, an auxiliary adjustment mechanism arranged at the upper end of the test cavity construction mechanism, and a liquid guiding mechanism and a data monitoring mechanism arranged on the support platform, wherein a through hole is provided at the middle position of the support platform, the internal space of the test cavity construction mechanism is connected to the through hole, the synchronous driving mechanism is connected to the height adjustment mechanism, the height adjustment mechanism is used to adjust the distance between the pressing platform and the support platform, when the pressing platform contacts the test piece and applies a set pressure value to it, a sealed test chamber is formed between the test cavity construction mechanism, the pressing platform and the test piece, the output end of the liquid guiding mechanism is connected to the test chamber, and the data monitoring mechanism is used to obtain the hydraulic pressure in the test chamber and the chloride ion concentration of the chlorine-containing solution;

[0007] The test cavity construction mechanism includes a through-type cylinder fixedly connected to the middle position of the upper end of the pressure-covering platform, a volume adjustment component arranged inside the through-type cylinder, and an exhaust component arranged on the volume adjustment component, wherein the volume adjustment component is used to adjust the volume of the test chamber, and the interior of the test chamber is connected to the external space through the exhaust component;

[0008] The auxiliary adjustment mechanism is used to adjust the distance between the volume adjustment component and the pressing platform and to apply a set value of pressure to the volume adjustment component.

[0009] As a further optimization scheme of the present invention, the height adjustment assembly includes several screws movably connected to the support platform, several screws are evenly distributed at the four corners of the support platform, several of the screws are threadedly connected to the pressing platform, and a gasket is provided in the middle of the upper end of the support platform.

[0010] As a further optimization scheme of the present invention, the synchronous drive mechanism includes a first motor, a first sprocket connected to the output shaft end of the first motor, a second sprocket connected to one of the screws, a first chain connected between the first sprocket and the second sprocket, a third sprocket connected to the height adjustment mechanism, and a second chain connected between several third sprockets. The first motor is fixedly connected to the upper end of the support platform, and a U-shaped cavity is provided inside the support platform. The output shaft end of the first motor passes through the upper end of the support platform and extends into the U-shaped cavity. The first sprocket, the first chain, the second sprocket, the third sprocket and the second chain are all located in the U-shaped cavity, and the lower ends of several screws pass through the upper end of the support platform and are movably connected to the inner bottom wall of the U-shaped cavity.

[0011] As a further optimization scheme of the present invention, the overburden platform includes an overburden plate, a plurality of nuts fixedly connected to the overburden plate, and a sealing gasket connected at the middle position of the bottom end of the overburden plate. The overburden plate is provided with a plurality of through holes, and the plurality of through holes are arranged corresponding to the nuts. A plurality of screw rods pass through the corresponding through holes and are threadedly connected with the matching nuts.

[0012] As a further optimization scheme of the present invention, the volume adjustment assembly includes a limit block fixedly connected to the inner wall of the through-type cylinder and a first piston member arranged in the through-type cylinder, the outer diameter of the first piston member is the same as the inner diameter of the through-type cylinder, and a piston ring is sleeved on the outer circular surface of the first piston member, the limit block is arranged on the inner wall of the through-type cylinder close to the pressure plate, and the first piston member is located above the limit block.

[0013] As a further optimization scheme of the present invention, the exhaust assembly includes an air hole arranged on the first piston member, a first pipe connected to the upper end of the first piston member, a liquid level gauge and a solenoid valve connected to the first pipe, and the first pipe is connected to the test chamber through the first piston member.

[0014] As a further optimization scheme of the present invention, the auxiliary adjustment mechanism includes a plurality of telescopic rods fixedly connected to the upper end of the through-type cylinder, a first bracket connected between the plurality of telescopic rods, a second motor fixedly mounted on the first bracket, a second bracket fixedly connected to the opening at the upper end of the through-type cylinder, a screw threadedly connected to the second bracket, a second piston member movably connected to the lower end of the screw, a spring fixedly connected to the lower end of the second piston member, and a plurality of limiting guide rods connected to the upper end of the second piston member, wherein the plurality of limiting guide rods are all slidably connected to the second bracket, the output shaft end of the second motor is detachably connected to the upper end of the screw, the lower end of the spring is fixedly connected to the first piston member, the outer diameter of the second piston member is the same as the inner diameter of the through-type cylinder, and a piston ring is sleeved on the outer circumferential surface of the second piston member, and a plurality of first pipes are provided at a position close to the second bracket on the through-type cylinder, and the thickness of the second piston member is less than the distance between the first pipe and the second bracket.

[0015] As a further optimization scheme of the present invention, the liquid guide mechanism includes a joint connected to the upper end of the pressure covering plate, a liquid guide channel arranged inside the pressure covering plate, a first liquid guide tube connected to the inner wall of the perforation, a telescopic bellows connected to one end of the first liquid guide tube, a second liquid guide tube connected to one end of the telescopic bellows, and a plurality of liquid guide holes arranged on the second liquid guide tube, the lower end surface of the sealing gasket of the second liquid guide tube is flush, and the first liquid guide tube is connected to the joint through the liquid guide channel.

[0016] As a further optimization scheme of the present invention, the data monitoring mechanism includes a hydraulic sensor and a chloride ion sensor connected to the inner wall of the perforation and a connecting terminal connected to the upper end of the pressure covering plate, and the hydraulic sensor and the chloride ion sensor are both electrically connected to the connecting terminal.

[0017] A concrete chloride ion diffusion resistance simulation test method, using the concrete chloride ion diffusion resistance simulation test equipment as described above, comprises the following steps:

[0018] Step 100, placing the concrete test piece between the pressing platform and the supporting platform;

[0019] Step 200, the height adjustment mechanism is driven to operate by the synchronous driving mechanism, and when the height adjustment mechanism operates, the pressing platform is driven to move toward the supporting platform until the pressing platform contacts the upper end surface of the concrete test piece and generates a set pressure, thereby forming a sealed test chamber above the concrete test piece;

[0020] Step 300, opening the exhaust assembly, and pouring a set amount of chlorine-containing solution into the test chamber through the liquid guide mechanism;

[0021] Step 400, driving the volume adjustment component to move toward the concrete test piece through the auxiliary adjustment mechanism until the gas in the test chamber is completely exhausted, and then closing the exhaust component;

[0022] Step 500, continuously driving the volume adjustment assembly to move toward the concrete test piece through the auxiliary adjustment mechanism until the hydraulic pressure of the chlorine-containing liquid in the test chamber reaches a set value;

[0023] Step 600: monitor the hydraulic pressure and chloride ion concentration of the chlorine-containing solution in the test chamber in real time through the data monitoring mechanism. When the hydraulic pressure decreases, the volume adjustment component is driven by the auxiliary adjustment mechanism to continue to move toward the concrete test piece until the hydraulic pressure of the chlorine-containing liquid in the test chamber reaches a set value. When the hydraulic pressure reaches the set value and the chloride ion concentration of the chlorine-containing solution is higher or lower than the set range, the chlorine-containing solution of a set amount and a set concentration is introduced into the test chamber through the liquid guiding mechanism.

[0024] The beneficial effects of the present invention are as follows: the present invention can adjust the test chamber formed between the test cavity construction mechanism and the test piece through the auxiliary adjustment mechanism, and can stably adjust the pressure and solution concentration in the test chamber during the test. Compared with the method of continuously introducing a large amount of solution for pressure adjustment, it can not only effectively reduce the loss of chlorine-containing solution, but also effectively improve the stability of the liquid in the test chamber, effectively reduce the influence of turbulence generated when the chlorine-containing solution is reintroduced on the test, and improve the accuracy of the test parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 The present invention Figure 1 The cross-sectional view at AA in FIG.

[0027] Figure 3 The present invention Figure 2 A magnified view of point B in FIG.

[0028] Figure 4 The present invention Figure 2 A magnified view of point C in FIG.

[0029] Figure 5 The present invention Figure 2 A magnified view at D in FIG.

[0030] Figure 6 It is a matching view of the synchronous driving mechanism and the height adjustment mechanism of the present invention.

[0031] In the figure: 1, support platform; 101, gasket; 102, Chinese-shaped cavity; 2, synchronous drive mechanism; 201, first motor; 202, first sprocket; 203, first chain; 204, second sprocket; 205, third sprocket; 206, second chain; 3, height adjustment mechanism; 301, screw; 4, pressing platform; 401, pressing plate; 402, nut; 403, perforation; 404, sealing gasket; 5, test cavity construction mechanism; 501, through-type cylinder; 502, limit block; 503, first piston; 5030, air hole; 504, seal gasket; 505, test cavity construction mechanism; 506, test cavity construction mechanism; 507, test cavity construction mechanism; 508, test cavity construction mechanism; 509, test cavity construction mechanism; 510, test cavity construction mechanism; 511, test cavity construction mechanism; 512, test cavity construction mechanism; 513, test cavity construction mechanism; 514, test cavity construction mechanism; 515, test cavity construction mechanism; 516, test cavity construction mechanism; 517, test cavity construction mechanism; 518, test cavity construction mechanism; 519, test cavity construction mechanism; 520, test cavity construction mechanism; 521, test cavity construction mechanism; 522, test cavity construction mechanism; 523, test cavity construction mechanism; 524, test cavity construction mechanism; 525, test cavity construction mechanism; 526, test cavity construction mechanism; 527, test cavity construction mechanism; 528, test cavity construction mechanism; 529, test cavity construction mechanism; 530, test cavity construction mechanism; 531, test cavity construction mechanism; 532, test cavity construction mechanism; 533, test cavity construction mechanism; 534, test cavity construction mechanism; 535, test cavity construction mechanism; 53 04. First pipeline; 505. Liquid level meter; 506. Solenoid valve; 6. Auxiliary adjustment mechanism; 601. Telescopic rod; 602. First bracket; 603. Second motor; 604. Second bracket; 605. Screw rod; 606. Second piston member; 607. Spring; 608. Limit guide rod; 7. Liquid guiding mechanism; 701. Joint; 702. First liquid guiding tube; 703. Telescopic bellows; 704. Second liquid guiding tube; 7040. Liquid guiding hole; 8. Data monitoring mechanism; 801. Hydraulic sensor; 802. Chloride ion sensor; 803. Connecting terminal. DETAILED DESCRIPTION

[0032] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only intended to enable those skilled in the art to better understand and implement the subject matter described herein. In addition, the features described relative to some examples may also be combined in other examples.

[0033] like Figure 1-2As shown, a concrete chloride ion diffusion resistance simulation test equipment comprises a support platform 1, a height adjustment mechanism 3 movably connected to the support platform 1, a synchronous driving mechanism 2 arranged on the support platform 1, a pressing platform 4 threadedly connected to the height adjustment mechanism 3, a test cavity construction mechanism 5 fixedly connected to the middle position of the upper end of the pressing platform 4, an auxiliary adjustment mechanism 6 arranged at the upper end of the test cavity construction mechanism 5, and a liquid guiding mechanism 7 and a data monitoring mechanism 8 arranged on the support platform 1, a through hole 403 is provided at the middle position of the support platform 1, the internal space of the test cavity construction mechanism 5 is connected to the through hole 403, the synchronous driving mechanism 2 is connected to the height adjustment mechanism 3, the height adjustment mechanism 3 is used to adjust the distance between the pressing platform 4 and the support platform 1, when the pressing platform 4 contacts the test piece and applies a set pressure value to it, a sealed test chamber is formed between the test cavity construction mechanism 5, the pressing platform 4 and the test piece, the output end of the liquid guiding mechanism 7 is connected to the test chamber, and the data monitoring mechanism 8 is used to obtain the hydraulic pressure in the test chamber and the chloride ion concentration of the chlorine-containing solution;

[0034] The test cavity construction mechanism 5 includes a through-type cylinder 501 fixedly connected to the middle position of the upper end of the pressing platform 4, a volume adjustment component arranged inside the through-type cylinder 501, and an exhaust component arranged on the volume adjustment component. The volume adjustment component is used to adjust the volume of the test chamber. The interior of the test chamber is connected to the external space through the exhaust component.

[0035] The auxiliary adjustment mechanism 6 is used to adjust the distance between the volume adjustment component and the pressing platform 4 and to apply a set value of pressure to the volume adjustment component.

[0036] It should be noted that the test process of the chloride ion diffusion resistance of concrete test pieces using the above concrete chloride ion diffusion resistance simulation test equipment includes the following steps:

[0037] The concrete test piece is placed between the pressing platform 4 and the supporting platform 1;

[0038] The height adjustment mechanism 3 is driven to operate by the synchronous driving mechanism 2, and when the height adjustment mechanism 3 operates, the pressing platform 4 is driven to move toward the supporting platform 1, until the pressing platform 4 contacts the upper end surface of the concrete test piece and generates a set value of pressure, and forms a sealed test chamber above the concrete test piece;

[0039] Open the exhaust assembly and pour a set amount of chlorine-containing solution into the test chamber through the liquid guiding mechanism 7;

[0040] The volume adjustment component is driven to move toward the concrete test piece by the auxiliary adjustment mechanism 6 until the gas in the test chamber is completely exhausted and then the exhaust component is closed;

[0041] The volume adjustment assembly is continuously driven to move toward the concrete test piece by the auxiliary adjustment mechanism 6 until the hydraulic pressure of the chlorine-containing liquid in the test chamber reaches a set value;

[0042] The hydraulic pressure and chloride ion concentration of the chlorine-containing solution in the test chamber are monitored in real time by the data monitoring mechanism 8. When the hydraulic pressure decreases, the volume adjustment component is driven by the auxiliary adjustment mechanism 6 to continue to move toward the concrete test piece until the hydraulic pressure of the chlorine-containing liquid in the test chamber reaches a set value. When the hydraulic pressure reaches the set value and the chloride ion concentration of the chlorine-containing solution is higher or lower than the set range, the chlorine-containing solution of a set amount and a set concentration is introduced into the test chamber by the liquid guiding mechanism 7.

[0043] Compared with the method of continuing to introduce a large amount of solution for pressure regulation, the loss of chlorine-containing solution can be effectively reduced, the stability of the liquid in the test chamber can be effectively improved, and the influence of turbulence generated when the chlorine-containing solution is reintroduced on the test can be effectively reduced, thereby improving the accuracy of the test parameters.

[0044] In one embodiment of the present invention, Figure 1-2 and Figure 6 As shown, the height adjustment assembly includes a plurality of screw rods 301 movably connected to the support platform 1, the plurality of screw rods 301 are evenly distributed at the four corners of the support platform 1, the plurality of screw rods 301 are all threadedly connected to the pressing platform 4, and a gasket 101 is provided at the middle position of the upper end of the support platform 1.

[0045] It should be noted that when the synchronous drive mechanism 2 drives the height adjustment mechanism 3 to adjust the pressing platform 4 to move toward or away from the supporting platform 1, the synchronous drive mechanism 2 can drive several screw rods 301 to rotate in the same direction and at the same angle. In this embodiment, four screw rods 301 are taken as an example. Since the four screw rods 301 are all threadedly connected to the pressing platform 4, the pressing platform 4 is constrained by the four screw rods 301 and can only move along the length direction of the screw rods 301. The length direction of the screw rods 301 is perpendicular to the direction of the supporting platform 1, so that the pressing platform 4 can be parallel to the supporting platform 1 when moving up and down, and the four corners of the pressing platform 4 are subjected to the same force, so that the pressing platform 4 can form a stable and close contact with the concrete test piece, thereby forming a stable test chamber above the concrete test piece.

[0046] In one embodiment of the present invention, Figure 1-2 and Figure 6As shown, the synchronous drive mechanism 2 includes a first motor 201, a first sprocket 202 connected to the output shaft end of the first motor 201, a second sprocket 204 connected to one of the screw rods 301, a first chain 203 connected between the first sprocket 202 and the second sprocket 204, a third sprocket 205 connected to the height adjustment mechanism 3, and a second chain 206 connected between a plurality of third sprockets 205, the first motor 201 is fixedly connected to the upper end of the support platform 1, a U-shaped cavity 102 is provided inside the support platform 1, the output shaft end of the first motor 201 passes through the upper end of the support platform 1 and extends into the U-shaped cavity 102, the first sprocket 202, the first chain 203, the second sprocket 204, the third sprocket 205 and the second chain 206 are all located in the U-shaped cavity 102, and the lower ends of the plurality of screw rods 301 pass through the upper end of the support platform 1 and are movably connected to the inner bottom wall of the U-shaped cavity 102;

[0047] The overburden platform 4 includes an overburden plate 401, a plurality of nuts 402 fixedly connected to the overburden plate 401, and a sealing gasket 404 connected at the middle position of the bottom end of the overburden plate 401. The overburden plate 401 is provided with a plurality of through holes, and the plurality of through holes are arranged corresponding to the nuts 402. A plurality of screw rods 301 respectively pass through the corresponding through holes and are threadedly connected with the matching nuts 402.

[0048] It should be noted that, as described above, when the four screw rods 301 are driven to rotate in the same direction and at the same angle by the synchronous drive mechanism 2, the first sprocket 202 is driven to rotate by the first motor 201, and after the first sprocket 202 rotates, the second sprocket 204 is driven to rotate through the first chain 203. Since the second sprocket 204 is connected to one of the screw rods 301, when the second sprocket 204 rotates, it can drive one of the screw rods 301 to rotate. When one of the screw rods 301 rotates, it drives the third sprocket 205 connected thereto to rotate. After the third sprocket 205 rotates, it can drive the third sprockets 205 connected to the other three screw rods 301 through the second chain 206. The four screw rods 301 rotate in the same direction and at the same angle. The four screw rods 301 rotate simultaneously, which can drive the corresponding nuts 402 to move in the vertical direction. Since the nuts 402 are fixedly connected to the pressing plate 401, the pressing plate 401 can be driven to move downward stably following the nuts 402. Moreover, the four corners of the pressing plate 401 are evenly stressed, which can ensure that the sealing gasket 404 is in parallel contact with the upper end surface of the concrete test piece and is pressed on the concrete test piece with a set pressure, so that the sealing gasket 404 can be deformed and stably seal the gap between the pressing plate 401 and the concrete test piece.

[0049] In one embodiment of the present invention, Figure 1-2As shown, the volume regulating assembly includes a limit block 502 fixedly connected to the inner wall of the through-type cylinder 501 and a first piston member 503 arranged in the through-type cylinder 501. The outer diameter of the first piston member 503 is the same as the inner diameter of the through-type cylinder 501, and a piston ring is sleeved on the outer circumferential surface of the first piston member 503. The limit block 502 is arranged on the inner wall of the through-type cylinder 501 near the pressure plate 401, and the first piston member 503 is located above the limit block 502.

[0050] It should be noted that, as mentioned above, the first piston member 503 divides the internal space of the through-type cylinder 501 into two parts, the lower part, which is connected to the perforation 403 to form a test chamber above the concrete test piece. When the position of the first piston member 503 in the through-type cylinder 501 changes, the volume of the test chamber can be adjusted, and when the upper end of the first piston member 503 is subjected to a set pressure value, it can be transmitted to the test chamber, thereby realizing the hydraulic regulation of the chlorine-containing solution in the test chamber without the need to continuously introduce liquid for hydraulic regulation, which can effectively reduce the use of chlorine-containing solution, reduce resource loss and test costs.

[0051] In one embodiment of the present invention, Figure 1-3 As shown, the exhaust assembly includes an air hole 5030 provided on the first piston member 503, a first pipe 504 connected to the upper end of the first piston member 503, a liquid level meter 505 and a solenoid valve 506 connected to the first pipe 504, and the first pipe 504 is connected to the test chamber through the first piston member 503.

[0052] It should be noted that, initially, the space above the first piston member 503 is connected to the external space. When a set amount of chlorine-containing solution is introduced into the test chamber, the solenoid valve 506 can be opened to allow the gas in the test chamber to be discharged from the air hole 5030. When there is still air between the first piston member 503 and the liquid level, the first piston member 503 can be moved downward to squeeze the air to discharge it until the liquid level meter 505 detects that the liquid has entered the first pipeline 504 and a liquid level of a set height is generated. Then, the solenoid valve 506 is closed. At this time, only the chlorine-containing solution exists in the entire test chamber. At this time, the set pressure can continue to be applied to the first piston member 503, so that the hydraulic pressure of the chlorine-containing solution in the test chamber reaches the set value.

[0053] In one embodiment of the present invention, Figure 1-2As shown, the auxiliary adjustment mechanism 6 includes a plurality of telescopic rods 601 fixedly connected to the upper end of the through-type cylinder 501, a first bracket 602 connected between the plurality of telescopic rods 601, a second motor 603 fixedly mounted on the first bracket 602, a second bracket 604 fixedly connected to the opening at the upper end of the through-type cylinder 501, a screw rod 605 threadedly connected to the second bracket 604, a second piston member 606 movably connected to the lower end of the screw rod 605, a spring 607 fixedly connected to the lower end of the second piston member 606, and a plurality of limit guides connected to the upper end of the second piston member 606. Rod 608, several limiting guide rods 608 are all slidably connected to the second bracket 604, the output shaft end of the second motor 603 is detachably connected to the upper end of the screw rod 605, the lower end of the spring 607 is fixedly connected to the first piston member 503, the outer diameter of the second piston member 606 is the same as the inner diameter of the through-type cylinder 501, and a piston ring is sleeved on the outer circular surface of the second piston member 606, and several first pipes 504 are provided on the through-type cylinder 501 near the second bracket 604, and the thickness of the second piston member 606 is less than the distance between the first pipe 504 and the second bracket 604.

[0054] It should be noted that, as mentioned above, when the first piston member 503 is driven downward by the auxiliary regulating mechanism 6 and a set value of pressure is applied thereto, specifically, the screw rod 605 is driven to rotate by the second motor 603. Since the screw rod 605 is threadedly connected to the fixed second bracket 604, the screw rod 605 can be driven to move toward the first piston member 503. When the screw rod 605 moves, the second piston member 606 can be driven to move in the same direction and at the same distance until the solenoid valve 506 is closed. At this time, a closed gas storage space is formed between the second piston member 606 and the first piston member 503. Since the first piston member 503 is in contact with the liquid surface of the chlorine-containing solution, at this time, the downward movement of the first piston member 503 is blocked. , the second piston member 606 is continuously pushed downward by the screw rod 605, and the second piston member 606 begins to compress the spring 607 and the air between the second piston member 606 and the first piston member 503, and the elastic force and air pressure act on the first piston member 503, providing the first piston member 503 with a continuously increasing pressure, and the pressure is applied from above the first piston member 503, so that the first piston member 503 transmits the pressure value to the chlorine-containing solution. After being pressurized, the chlorine-containing solution generates the same hydraulic pressure to act on the first piston member 503, until the pressure value on the upper end of the first piston member 503 reaches the set value, so that the hydraulic pressure of the chlorine-containing solution in the test chamber can reach the set value.

[0055] In one embodiment of the present invention, Figure 1-2 and Figure 4As shown, the liquid guiding mechanism 7 includes a joint 701 connected to the upper end of the pressing plate 401, a liquid guiding channel arranged inside the pressing plate 401, a first liquid guiding tube 702 connected to the inner wall of the through hole 403, a telescopic bellows 703 connected to one end of the first liquid guiding tube 702, a second liquid guiding tube 704 connected to one end of the telescopic bellows 703, and a plurality of liquid guiding holes 7040 arranged on the second liquid guiding tube 704. The lower end surface of the second liquid guiding tube 704 is flush with the lower end surface of the sealing gasket 404, and the first liquid guiding tube 702 is connected to the joint 701 through the liquid guiding channel.

[0056] It should be noted that the joint 701 is externally connected to a hydraulic pump, and the chlorine-containing solution can be introduced into the test chamber through the hydraulic pump, and the entire liquid guiding mechanism 7 can move with the pressing plate 401, wherein, when the pressing plate 401 contacts and deforms with the concrete test piece, the second liquid guiding tube 704 and the sealing gasket 404 contact with the concrete test piece at the same time, and when the sealing gasket 404 deforms, the second liquid guiding tube 704 is forced to move upward and squeeze the telescopic bellows 703, so that the second liquid guiding tube 704 can always be in contact with the upper end surface of the concrete test piece, so that at the end of the test, all the chlorine-containing solution can be extracted, and when the solution is extracted, the second piston member 606 can be driven to move upward so that the space between the second piston member 606 and the first piston member 503 is connected to the first pipe 504, and the solenoid valve 506 is opened to reduce the influence of negative pressure on the solution when it is extracted.

[0057] In one embodiment of the present invention, Figure 1-2 and Figure 5 As shown, the data monitoring mechanism 8 includes a hydraulic sensor 801 and a chloride ion sensor 802 connected to the inner wall of the perforation 403 and a connecting terminal 803 connected to the upper end of the pressing plate 401 , and the hydraulic sensor 801 and the chloride ion sensor 802 are both electrically connected to the connecting terminal 803 .

[0058] It should be noted that the hydraulic sensor 801 and the chloride ion sensor 802 are used to obtain the hydraulic data and the chloride ion concentration data in the test chamber respectively. The hydraulic sensor 801 and the chloride ion sensor 802 are both existing technologies, and their specific models and parameters are not described here.

[0059] The present embodiment is described above, but the present embodiment is not limited to the above-mentioned specific implementation manner. The above-mentioned specific implementation manner is merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, which are all within the protection of the present embodiment.

Claims

1. A concrete chloride ion diffusion resistance simulation test equipment, characterized in that: The invention comprises a support platform (1), a height adjustment mechanism (3) movably connected to the support platform (1), a synchronous drive mechanism (2) arranged on the support platform (1), a pressing platform (4) threadedly connected to the height adjustment mechanism (3), a test cavity construction mechanism (5) fixedly connected to the middle position of the upper end of the pressing platform (4), an auxiliary adjustment mechanism (6) arranged at the upper end of the test cavity construction mechanism (5), and a liquid guiding mechanism (7) and a data monitoring mechanism (8) arranged on the support platform (1), wherein a through hole (403) is provided in the middle position of the support platform (1), and the test cavity construction mechanism (5) is provided with a plurality of holes (403) on the support platform (1). The internal space of the mechanism (5) is connected to the through hole (403), the synchronous driving mechanism (2) is connected to the height adjustment mechanism (3), the height adjustment mechanism (3) is used to adjust the distance between the pressing platform (4) and the supporting platform (1), when the pressing platform (4) contacts the test piece and applies a set pressure value to it, a sealed test chamber is formed between the test cavity construction mechanism (5), the pressing platform (4) and the test piece, the output end of the liquid guiding mechanism (7) is connected to the test chamber, and the data monitoring mechanism (8) is used to obtain the hydraulic pressure in the test chamber and the chloride ion concentration of the chloride-containing solution; The test cavity construction mechanism (5) comprises a through-type cylindrical body (501) fixedly connected to the middle position of the upper end of the pressing platform (4), a volume adjustment component arranged inside the through-type cylindrical body (501), and an exhaust component arranged on the volume adjustment component, wherein the volume adjustment component is used to adjust the volume of the test chamber, and the interior of the test chamber is connected to the external space through the exhaust component; The auxiliary adjustment mechanism (6) is used to adjust the distance between the volume adjustment component and the pressing platform (4) and to apply a set value of pressure to the volume adjustment component.

2. A concrete chloride ion diffusion resistance simulation test equipment according to claim 1, characterized in that: The height adjustment assembly comprises a plurality of screw rods (301) movably connected to the support platform (1), the plurality of screw rods (301) being evenly distributed at the four corners of the support platform (1), the plurality of screw rods (301) being threadedly connected to the pressing platform (4), and a gasket (101) being provided at the middle of the upper end of the support platform (1).

3. A concrete chloride ion diffusion resistance simulation test equipment according to claim 2, characterized in that: The synchronous drive mechanism (2) comprises a first motor (201), a first sprocket (202) connected to the output shaft end of the first motor (201), a second sprocket (204) connected to one of the screw rods (301), a first chain (203) connected between the first sprocket (202) and the second sprocket (204), a third sprocket (205) connected to the height adjustment mechanism (3), and a second chain (206) connected between a plurality of third sprockets (205), wherein the first motor (201) is fixedly connected to the support platform (1). The upper end of the support platform (1) is provided with a U-shaped cavity (102) inside the support platform (1); the output shaft end of the first motor (201) passes through the upper end of the support platform (1) and extends into the U-shaped cavity (102); the first sprocket (202), the first chain (203), the second sprocket (204), the third sprocket (205) and the second chain (206) are all located in the U-shaped cavity (102); the lower ends of a plurality of the screw rods (301) pass through the upper end of the support platform (1) and are movably connected to the inner bottom wall of the U-shaped cavity (102).

4. A concrete chloride ion diffusion resistance simulation test equipment according to claim 3, characterized in that: The cladding platform (4) comprises a cladding plate (401), a plurality of nuts (402) fixedly connected to the cladding plate (401), and a sealing gasket (404) connected to the middle of the bottom end of the cladding plate (401); the cladding plate (401) is provided with a plurality of through holes, the plurality of through holes being arranged corresponding to the nuts (402); and a plurality of screw rods (301) respectively pass through the corresponding through holes and are threadedly connected to the matching nuts (402).

5. A concrete chloride ion diffusion resistance simulation test equipment according to claim 4, characterized in that: The volume adjustment component comprises a limit block (502) fixedly connected to the inner wall of the through-type cylinder (501) and a first piston member (503) arranged in the through-type cylinder (501); the outer diameter of the first piston member (503) is the same as the inner diameter of the through-type cylinder (501); and a piston ring is sleeved on the outer circumferential surface of the first piston member (503); the limit block (502) is arranged on the inner wall of the through-type cylinder (501) close to the pressure plate (401); and the first piston member (503) is located above the limit block (502).

6. A concrete chloride ion diffusion resistance simulation test equipment according to claim 5, characterized in that: The exhaust assembly comprises an air hole (5030) provided on a first piston member (503), a first pipe (504) connected to the upper end of the first piston member (503), a liquid level gauge (505) and a solenoid valve (506) connected to the first pipe (504); the first pipe (504) is connected to the test chamber through the first piston member (503).

7. A simulation test equipment for concrete resistance to chloride ion diffusion according to claim 6, characterized in that: The auxiliary adjustment mechanism (6) comprises a plurality of telescopic rods (601) fixedly connected to the upper end of the through-type cylinder (501), a first bracket (602) connected between the plurality of telescopic rods (601), a second motor (603) fixedly mounted on the first bracket (602), a second bracket (604) fixedly connected to the opening at the upper end of the through-type cylinder (501), a screw rod (605) threadedly connected to the second bracket (604), a second piston member (606) movably connected to the lower end of the screw rod (605), a spring (607) fixedly connected to the lower end of the second piston member (606), and a plurality of limiting guide rods (608) connected to the upper end of the second piston member (606). , a plurality of the limit guide rods (608) are slidably connected to the second bracket (604), the output shaft end of the second motor (603) is detachably connected to the upper end of the screw rod (605), the lower end of the spring (607) is fixedly connected to the first piston member (503), the outer diameter of the second piston member (606) is the same as the inner diameter of the through-type cylinder (501), and a piston ring is sleeved on the outer circumferential surface of the second piston member (606), a plurality of first pipes (504) are provided on the through-type cylinder (501) at a position close to the second bracket (604), and the thickness of the second piston member (606) is less than the distance between the first pipe (504) and the second bracket (604).

8. A simulation test device for concrete resistance to chloride ion diffusion according to claim 7, characterized in that: The liquid guiding mechanism (7) comprises a joint (701) connected to the upper end of the pressing plate (401), a liquid guiding channel provided inside the pressing plate (401), a first liquid guiding tube (702) connected to the inner wall of the through hole (403), a telescopic bellows (703) connected to one end of the first liquid guiding tube (702), a second liquid guiding tube (704) connected to one end of the telescopic bellows (703), and a plurality of liquid guiding holes (7040) provided on the second liquid guiding tube (704); the lower end surface of the second liquid guiding tube (704) is flush with the lower end surface of the sealing gasket (404); and the first liquid guiding tube (702) is connected to the joint (701) through the liquid guiding channel.

9. A simulation test equipment for concrete resistance to chloride ion diffusion according to claim 8, characterized in that: The data monitoring mechanism (8) comprises a hydraulic sensor (801) and a chloride ion sensor (802) connected to the inner wall of the perforation (403) and a connecting terminal (803) connected to the upper end of the pressing plate (401), and the hydraulic sensor (801) and the chloride ion sensor (802) are both electrically connected to the connecting terminal (803).

10. A simulation test method for concrete resistance to chloride ion diffusion, characterized in that: The concrete chloride ion diffusion resistance simulation test equipment according to any one of claims 1 to 9 is used, comprising the following steps: Step 100: placing the concrete test piece between the pressing platform (4) and the supporting platform (1); Step 200: The height adjustment mechanism (3) is driven to operate by the synchronous driving mechanism (2); when the height adjustment mechanism (3) is in operation, the pressing platform (4) is driven to move toward the supporting platform (1) until the pressing platform (4) contacts the upper end surface of the concrete test piece and generates a set pressure, thereby forming a sealed test chamber above the concrete test piece; Step 300, opening the exhaust assembly, and pouring a set amount of chlorine-containing solution into the test chamber through the liquid guide mechanism (7); Step 400: driving the volume adjustment component to move toward the concrete test piece through the auxiliary adjustment mechanism (6) until the gas in the test chamber is completely exhausted and then closing the exhaust component; Step 500: continuously driving the volume adjustment assembly to move toward the concrete test piece through the auxiliary adjustment mechanism (6) until the hydraulic pressure of the chlorine-containing liquid in the test chamber reaches a set value; Step 600: The hydraulic pressure and chloride ion concentration of the chlorine-containing solution in the test chamber are monitored in real time by the data monitoring mechanism (8); when the hydraulic pressure decreases, the volume adjustment component is driven by the auxiliary adjustment mechanism (6) to continue to move toward the direction of the concrete test piece until the hydraulic pressure of the chlorine-containing liquid in the test chamber reaches a set value; when the hydraulic pressure reaches the set value and the chloride ion concentration of the chlorine-containing solution is higher or lower than a set range, a set amount and a set concentration of chlorine-containing solution are introduced into the test chamber by the liquid guiding mechanism (7).

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