A concrete sample water erosion test device

Abstract

The present invention discloses a concrete sample water erosion test device related to the field of concrete detection technology. It comprises: a base, the base is fixedly connected with a detection shell, a water pump and an electric push rod are installed in the base, the telescopic end of the electric push rod passes through the detection shell and is sealed and slidably connected with it, and the water pump is connected with the inside of the detection shell; a slide cylinder is fixedly connected in the detection shell, a piston plate is sealed and slidably connected in the slide cylinder, and a first spring is fixedly connected between the telescopic end of the electric push rod and the piston plate; a sensor is installed in the detection shell. In the present invention, in the dry-wet alternating test of concrete samples, the seawater is pressurized in the stage of simulating high tide to promote the erosion of seawater into the sample, and the air is blown to the surface of the sample in the stage of simulating low tide to promote the volatilization of seawater in the sample, thereby shortening the time required for a dry-wet alternation cycle of the sample, and further shortening the time required for the overall concrete erosion test.

Description

Technical Field

[0001] The invention relates to the technical field of concrete detection, in particular to a concrete sample water erosion test device. Background Art

[0002] Concrete structures used in coastal or marine environments are in contact with seawater all year round and are eroded by seawater, which reduces the strength of the concrete. Water erosion tests on concrete specimens are currently conducted to understand the impact of seawater erosion on concrete strength. The concrete water erosion test includes two methods: long-term immersion and dry-wet alternation. The dry-wet alternation focuses on studying the impact of high tide and low tide on concrete.

[0003] The high and low tides cause the concrete to alternate between a dry and wet environment all year round, resulting in uneven volume changes in different parts of the concrete. At the same time, after the tide recedes, the salt in the seawater crystallizes and precipitates as the water evaporates. The expansion stress generated by the salt crystallization damages the pore structure of the concrete, ultimately increasing the porosity of the concrete and reducing its strength.

[0004] During the dry-wet alternation test, on the one hand, the seawater needs to have sufficient time to penetrate into the concrete, and on the other hand, the seawater in the concrete needs to have sufficient time to evaporate and form salt crystals in the concrete. This results in a long cycle of dry-wet alternation of concrete, and the entire concrete dry-wet alternation test requires dozens or even hundreds of cycles, and the entire test takes a long time. Summary of the invention

[0005] The invention provides a concrete sample water erosion test device to overcome the shortcoming that the existing concrete sample dry-wet alternating test requires a long time.

[0006] The technical solution is: a concrete sample water erosion test device, comprising:

[0007] A base, wherein the base is fixedly connected to a detection shell, a water pump and an electric push rod are installed in the base, a telescopic end of the electric push rod passes through the detection shell and is sealed and slidably connected thereto, and the water pump is communicated with the interior of the detection shell;

[0008] A slide cylinder is fixedly connected in the detection shell, a piston plate is sealingly and slidably connected in the slide cylinder, and a first spring is fixedly connected between the telescopic end of the electric push rod and the piston plate;

[0009] A sensor, installed in the detection shell, for monitoring the water pressure in the detection shell;

[0010] An air pump is installed on the detection shell. The air pump is connected to a cleaning transfer ring. A fixed cover is provided on the detection shell. An annular flow channel is provided in the fixed cover. The cleaning transfer ring is connected to the annular flow channel through a first conduit.

[0011] Furthermore, it also includes:

[0012] A film is fixed to the fixed cover, and the fixed cover is provided with an annular guide surface;

[0013] A blocking ring, fixedly connected to the film, wherein the height of the lowest point of the blocking ring is lower than the height of the annular guide surface;

[0014] The piston rod is fixedly connected to the sealing ring. The fixed cover is provided with a stepped through hole. The piston rod slides in a sealed manner in the stepped through hole of the fixed cover.

[0015] Furthermore, it also includes:

[0016] A middle connector is arranged in the detection shell, a bottom cover is arranged in the detection shell, and a sealing capsule is fixedly connected to a position of the detection shell close to the fixed cover;

[0017] A mounting shell is fixedly connected to the detection shell, an air inlet and an exhaust port are arranged on the mounting shell, the exhaust port is communicated with the sealing bag, a pressing piece is limited in position and sealingly slidably connected in the mounting shell, the pressing piece is provided with a rectangular through groove, the rectangular through groove is used to control the connection relationship between the mounting shell and the outside, a sealing piece is limited in position and sealingly slidably connected in the pressing piece, the sealing piece is sealingly slidably connected with the mounting shell, a second spring is fixedly connected between the sealing piece and the mounting shell, and a third spring is fixedly connected between the pressing piece and the sealing piece;

[0018] The sealing transfer ring is fixedly connected to the detection shell and communicated with the air pump. The sealing transfer ring is communicated with the air inlet.

[0019] Furthermore, the elastic coefficient of the second spring between the sealing member and the mounting shell is greater than the elastic coefficient of the third spring between the pressing member and the sealing member.

[0020] Furthermore, the fixed cover is provided with an arc-shaped groove, the middle connecting piece and the bottom cover are both provided with an annular groove, and the arc-shaped groove and the annular groove are both in contact with and matched with the sealing bag.

[0021] Furthermore, it also includes:

[0022] A cleaning ring is fixedly connected to a position of the detection shell close to the fixed cover, and the fixed cover, the middle connecting piece and the bottom cover are all extrusion-matched with the cleaning ring.

[0023] Furthermore, it also includes:

[0024] The guide frame is fixedly connected to the detection shell at a position close to the fixed cover, and the middle connecting piece is provided with a guide inclined surface.

[0025] Furthermore, a drainage hole is provided on the middle connecting piece.

[0026] Furthermore, it also includes:

[0027] A sliding shaft is fixedly connected to the lower side of the bottom cover, the sliding shaft is limitedly slidably connected to a limiting member, and a fourth spring is fixedly connected between the limiting member and the bottom cover;

[0028] A winding shaft is slidably and rotatably connected to the sliding shaft, a pull rope is fixedly connected to the winding shaft, and the pull rope passes through the limiting member, the bottom cover and the middle connecting member in sequence and is then fixedly connected to the fixed cover;

[0029] The elastic sheet is fixedly connected to the winding shaft, and the limiting member is provided with a limiting groove, and the limiting groove is limitedly matched with the elastic sheet.

[0030] Furthermore, the pull rope passes through the annular groove on the middle connecting piece and the annular groove on the bottom cover, and the pull rope contacts and cooperates with the sealing bag.

[0031] The invention discloses the following technical effects: in a dry-wet alternation test on a concrete sample, the invention pressurizes seawater in a stage of simulating high tide to promote the erosion of seawater into the sample, and blows air to the sample surface in a stage of simulating low tide to promote the volatilization of seawater in the sample, thereby shortening the time required for a dry-wet alternation cycle of the sample, and further shortening the time required for the overall concrete erosion test; by changing the direction of the wind flow, the seawater adhering to the sample surface is first blown away to promote the volatilization of seawater in the sample, and then the wind flow direction is adjusted to avoid the wind flow from eroding the sample surface; the moist wind flow is guided to a position away from the air pump by the cooperation of a guiding slope and a guiding frame to ensure the dryness of the gas entering the air pump, and further ensure the efficiency of the air flow in promoting the volatilization of water inside the sample; a load is applied to the first sample and the second sample by a pull rope to simulate the load condition of the sample in actual use, thereby improving the practicality and comparability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the three-dimensional structure of the base, the detection shell and the water pump of the present invention;

[0034] Figure 3 It is a three-dimensional structural schematic diagram of the electric push rod, the slide cylinder and the piston plate of the present invention;

[0035] Figure 4 It is a three-dimensional structural schematic diagram of the fixed cover, the middle connecting piece and the bottom cover of the present invention;

[0036] Figure 5It is a three-dimensional structural cross-sectional view of the detection shell, the fixing cover and the installation shell of the present invention;

[0037] Figure 6 The present invention is attached Figure 5 The enlarged view of point A in the middle;

[0038] Figure 7 An exploded view of the fixed cover, the middle connector and the bottom cover of the present invention;

[0039] Figure 8 It is a schematic diagram of the three-dimensional structure of the mounting shell, the pressing member and the sealing member of the present invention;

[0040] Fig. 9 It is a schematic diagram of the three-dimensional structure of the guide frame, the guide slope and the drainage hole of the present invention;

[0041] Fig.10 It is a three-dimensional structural schematic diagram of the limiter, the winding shaft and the pull rope of the present invention;

[0042] Fig.11 An exploded view of the sliding shaft, the stopper and the winding shaft of the present invention;

[0043] Fig.12 It is an exploded view of the limiter, the winding shaft and the elastic sheet of the present invention.

[0044] Wherein: 101-base, 1-detection shell, 2-water pump, 3-electric push rod, 4-slide, 5-piston plate, 6-sensor, 7-air pump, 8-cleaning transfer ring, 9-fixing cover, 901-annular flow channel, 902-annular guide surface, 10-film, 11-sealing ring, 12-piston rod, 13-middle connector, 14-bottom cover, 15-sealing capsule, 151-arc groove, 152-annular groove, 16-installation shell, 161-air inlet, 162-exhaust port, 17-pressing piece, 171-rectangular through groove, 18-sealing piece, 19-sealing transfer ring, 20-cleaning ring, 21-guide frame, 211-guide slope, 212-drainage hole, 22-sliding shaft, 23-limiting piece, 24-winding shaft, 25-pull rope, 26-elastic sheet, 261-limiting groove. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] A concrete sample water erosion test device, please refer to Figure 1-Figure 5, including: a base 101, the base 101 is fixedly connected to a detection shell 1, a water pump 2 and an electric push rod 3 are installed in the base 101, the telescopic end of the electric push rod 3 passes through the detection shell 1 and is sealed and slidably connected thereto, and the water pump 2 is communicated with the inside of the detection shell 1; a slide cylinder 4 is fixedly connected to the detection shell 1, a piston plate 5 is sealed and slidably connected in the slide cylinder 4, and a first spring is fixedly connected between the telescopic end of the electric push rod 3 and the piston plate 5; a sensor 6 is installed in the detection shell 1 and is used to monitor the water pressure in the detection shell 1; an air pump 7 is installed on the detection shell 1, the air pump 7 is connected to a cleaning transfer ring 8, a fixed cover 9 is provided on the detection shell 1, an annular flow channel 901 is provided in the fixed cover 9, and the cleaning transfer ring 8 is communicated with the annular flow channel 901 through a first conduit.

[0047] The above scheme aims to solve the problem that the dry-wet alternation test of the existing concrete specimens (hereinafter referred to as specimens) takes a long time. The scheme pressurizes the seawater in the stage of simulating high tide to promote the erosion of seawater into the specimen, and blows air to the surface of the specimen in the stage of simulating low tide to promote the volatilization of seawater in the specimen, thereby shortening the time required for a dry-wet alternation cycle of the specimen. The first conduit is a retractable conduit, which is only shown in the attached figure for illustration. The detection shell 1 is used to store seawater, and the water pump 2 can be a plunger pump, which can prevent the seawater in the detection shell 1 from flowing back to the outside through the water pump 2. The sensor 6 can be a water pressure sensor, which can monitor the pressure of the seawater in the detection shell 1 in real time, and control the extension and retraction of the telescopic end of the electric push rod 3 to keep the seawater in the detection shell 1 always at a constant pressure. in a stable high-pressure state; an airflow drying device can be installed at the air inlet of the air pump 7 to ensure the dryness of the airflow around the fixed cover 9, and the dry airflow is used to take away the volatilized moisture in the fixed cover 9, thereby accelerating the drying rate of the fixed cover 9, and at the same time does not affect the crystallization process of the salt in the seawater in the fixed cover 9; the number of fixed covers 9 can be increased according to the number of test samples; the principle of pressurizing the seawater is as follows: the lower side of the piston plate 5, the detection shell 1 and the slide cylinder 4 form an extrusion chamber, and as the telescopic end of the electric push rod 3 extends, the first spring is compressed, so that the piston plate 5 has a tendency to move upward, and the volume of the extrusion chamber has a tendency to increase, thereby making the volume of seawater in the detection shell 1 tend to decrease, thereby increasing the pressure of the seawater in the detection shell 1.

[0048] Please refer to Figure 5-Figure 7 , and also includes: a film 10, which is fixedly connected to the fixed cover 9, and the fixed cover 9 is provided with an annular guide surface 902; a sealing ring 11, which is fixedly connected to the film 10, and the height of the lowest point of the sealing ring 11 is lower than the height of the annular guide surface 902; a piston rod 12, which is fixedly connected to the sealing ring 11, and the fixed cover 9 is provided with a stepped through hole, and the piston rod 12 slides in the stepped through hole of the fixed cover 9 in a sealed manner.

[0049] In the above scheme, the purpose is to change the direction of the wind flow, first blow away the seawater adhering to the surface of the sample, promote the volatilization of the seawater in the sample, and then adjust the direction of the wind flow to avoid erosion of the sample surface by the wind flow; the film 10 can be a flexible film; the sealing ring 11 and the piston rod 12 are both made of high density, and the sealing ring 11 and the piston rod 12 are subsequently reset by their own gravity; by increasing the air supply speed of the air pump 7, thereby increasing the air pressure in the annular flow channel 901, the air pressure in the annular flow channel 901 is used to push the piston rod 12 and the sealing ring 11 upward, and the wind flow passes through After being guided by the annular guide surface 902, the flow direction changes, so that the wind flows along the surface of the sample, assisting the separation of seawater from the surface of the sample, and then by reducing the air supply speed of the air pump 7, the air pressure in the annular flow channel 901 is reduced, and the piston rod 12 and the sealing ring 11 move downward under the action of their own gravity, so that the wind flow in the annular flow channel 901 finally flows out through the gap between the sealing ring 11 and the fixed cover 9. At this time, the wind flow direction is parallel to the central axis of the sample, which promotes the flow of water evaporated from the seawater in the sample, reduces the humidity around the sample, and thereby increases the volatilization rate of seawater in the sample.

[0050] Please refer to Figure 3-Figure 8 , further comprising: a middle connector 13, arranged in the detection shell 1, a bottom cover 14 is arranged in the detection shell 1, a sealing capsule 15 is fixedly connected to the detection shell 1 near the fixed cover 9; a mounting shell 16, fixedly connected to the detection shell 1, an air inlet 161 and an exhaust port 162 are arranged on the mounting shell 16, the exhaust port 162 is communicated with the sealing capsule 15, a pressing member 17 is limited in position and sealed and slidably connected in the mounting shell 16, the pressing member 17 is provided with a rectangular through groove 171, the rectangular through groove 171 is used to control the connection relationship between the mounting shell 16 and the outside world, a sealing member 18 is limited in position and sealed and slidably connected in the pressing member 17, and the sealing member 18 is connected to the mounting shell 16 A sealed sliding connection is provided, a second spring is fixedly connected between the sealing member 18 and the mounting shell 16, and a third spring is fixedly connected between the pressing member 17 and the sealing member 18; a sealing intermediate ring 19 is fixedly connected to the detection shell 1 and is connected to the air pump 7, and the sealing intermediate ring 19 is connected to the air inlet 161; the elastic coefficient of the second spring between the sealing member 18 and the mounting shell 16 is greater than the elastic coefficient of the third spring between the pressing member 17 and the sealing member 18; an arc-shaped groove 151 is provided on the fixed cover 9, and an annular groove 152 is provided on the intermediate member 13 and the bottom cover 14, and the arc-shaped groove 151 and the annular groove 152 are both in contact with and cooperate with the sealing bag 15.

[0051] In the above scheme, the expansion of the sealing capsule 15 is used to seal the fixed cover 9 to ensure the pressure of the seawater in the detection shell 1. At the same time, through the installation shell 16, the pressing piece 17 and the sealing piece 18, the expansion and contraction of multiple sealing capsules 15 are independently carried out, which is convenient for the test personnel to adjust the sample in the detection shell 1 (for example, in a test of multiple samples together, one of the samples can be taken out separately); the sealing capsule 15 is made of elastic material; the height of the rectangular through groove 171 is greater than the thickness of the upper part of the installation shell 16, and is used to connect the internal space of the installation shell 16 with the outside world; the third spring is always in a compressed state, which is used to ensure that the position of the pressing piece 17 remains unchanged during the flow of gas from the air inlet 161 to the exhaust port 162; the arc groove 151 and the annular groove 152 increases the contact area between the fixed cover 9, the middle connector 13 and the bottom cover 14 and the sealing bag 15, and improves the sealing between the fixed cover 9, the middle connector 13 and the bottom cover 14 and the sealing bag 15; the fixed cover 9, the middle connector 13 and the bottom cover 14, a sample is fixed between each two (hereinafter, the sample between the fixed cover 9 and the middle connector 13 is referred to as the first sample, and the sample between the middle connector 13 and the bottom cover 14 is referred to as the second sample), so that the first sample can be subjected to a dry-wet alternating test and the second sample can be subjected to a long-term immersion test. The two tests are carried out together, thereby improving the accuracy of the test results, or the first sample and the second sample are subjected to a dry-wet alternating test or a long-term immersion test at the same time, thereby increasing the number of samples and thereby improving the reliability of the test results.

[0052] Please refer to Figure 4-Figure 7 , further comprising: a cleaning ring 20 fixedly connected to the detection shell 1 at a position close to the fixed cover 9 , and the fixed cover 9 , the middle connecting piece 13 and the bottom cover 14 are all pressed and matched with the cleaning ring 20 .

[0053] In the above scheme, the cleaning ring 20 is intended to slide along the surfaces of the fixed cover 9, the middle connector 13 and the bottom cover 14 to scrape off the concrete debris adhered to the surfaces of the fixed cover 9, the middle connector 13 and the bottom cover 14, so as to prevent the concrete from entering between the above three (i.e., the fixed cover 9, the middle connector 13, the bottom cover 14) and the sealing bag 15, causing damage to the sealing bag 15 and affecting the sealing performance; the cleaning ring 20 is made of elastic material, the inner diameter of the cleaning ring 20 is smaller than the outer diameter of the fixed cover 9, the middle connector 13 and the bottom cover 14, the upper side of the cleaning ring 20 close to its axial position is a plane, and the plane is coplanar with the upper side of the detection shell 1, which is used for cleaning the fixed cover 9, the middle connector 13 Or when the bottom cover 14 moves to a position corresponding to the sealing bag 15 (that is, when the lower side of the fixed cover 9, the middle connector 13 or the bottom cover 14 contacts the plane on the upper side of the cleaning ring 20), the plane on the upper side of the cleaning ring 20 provides a temporary limit for the fixed cover 9, the middle connector 13 and the bottom cover 14. At this time, the tester can know that the fixed cover 9, the middle connector 13 or the bottom cover 14 is in place and locks the fixed cover 9, the middle connector 13 or the bottom cover 14. At the same time, the lower side of the cleaning ring 20 close to its axial position is an arc surface, which is convenient for squeezing the cleaning ring 20 to deform when the fixed cover 9, the middle connector 13 and the bottom cover 14 move upward, so that the cleaning ring 20 contacts the peripheral side of the fixed cover 9, the middle connector 13 and the bottom cover 14.

[0054] Please refer to Figure 1-Figure 3 , Figure 7 and Fig. 9 , further comprising: a guide frame 21 fixedly connected to the detection shell 1 at a position close to the fixed cover 9, a guide slope 211 is provided on the middle connecting member 13; and a drainage hole 212 is provided on the middle connecting member 13.

[0055] In the above scheme, the guiding slope 211 cooperates with the guiding frame 21 to guide the moist airflow to a position away from the air pump 7, so as to ensure the dryness of the gas entering the air pump 7, and further ensure the efficiency of the airflow in promoting the volatilization of the water inside the sample; when the first sample is dried, the middle connecting piece 13 contacts the sealing bag 15 (at this time, the highest point of the guiding slope 211 and the upper side of the guiding frame 21 are located in the same plane), and the seawater adhered to the surface of the first sample flows along itself and the guiding slope 211 to the inner side of the guiding frame 21 and the middle connecting piece 13. At the same time, the seawater seeping out of the first sample flows to the inner side of the guide frame 21 and the middle connecting piece 13 through the drainage hole 212; the airflow is guided by the guide slope 211, and the airflow with high humidity is quickly guided to the direction away from the first sample; a step surface is formed on the inner side of the guide frame 21, and the width of the upper side section of the guide frame 21 is greater than the width of the lower side section thereof. The step surface is used to make the airflow that changes its flow direction through the guide slope 211 flow along the guide frame 21 and take away the seawater between the inner side of the guide frame 21 and the fixed cover 9.

[0056] Please refer to Figure 9-12, and also includes: a sliding shaft 22, which is fixedly connected to the lower side of the bottom cover 14, the sliding shaft 22 is limited and slidably connected to the limiting member 23, and a fourth spring is fixedly connected between the limiting member 23 and the bottom cover 14; a winding shaft 24, which is slidably and rotatably connected to the sliding shaft 22, and a pull rope 25 is fixedly connected to the winding shaft 24, and the pull rope 25 passes through the limiting member 23, the bottom cover 14 and the middle connecting member 13 in sequence and is fixedly connected to the fixed cover 9; an elastic sheet 26, which is fixedly connected to the winding shaft 24, and the limiting member 23 is provided with a limiting groove 261, and the limiting groove 261 is limitedly matched with the elastic sheet 26; the pull rope 25 passes through the annular groove 152 on the middle connecting member 13 and the annular groove 152 on the bottom cover 14, and the pull rope 25 contacts and cooperates with the sealing bag 15.

[0057] In the above scheme, the purpose is to apply load to the first sample and the second sample through the pull rope 25, so as to simulate the load conditions of the samples during actual use and improve the practicality and comparability of the test results; the outer side of the pull rope 25 can be coated with a rubber layer, and when the sealing bag 15 squeezes the pull rope 25, the rubber layer on the pull rope 25 can be deformed and the holes on the bottom cover 14 and the middle connecting member 13 through which the pull rope 25 passes can be blocked; the matching relationship between the elastic sheet 26 and the limiting groove 261 is similar to the one-way rotation structure in the rear wheel of a bicycle; a strain gauge can be installed between the fourth spring and the limiting member 23 to judge the load on the sample according to the elastic force of the fourth spring.

[0058] The working process of the above scheme is as follows (taking the first sample for dry-wet alternating test and the second sample for long-term immersion test as an example): the tester fixes the second sample between the middle connection piece 13 and the bottom cover 14, and then fixes the first sample between the fixed cover 9 and the middle connection piece 13, and rotates the winding shaft 24. The winding shaft 24 rotates unidirectionally under the cooperation of the elastic sheet 26 and the limiting groove 261, and reels the pull rope 25. The pull rope 25 pulls the fixed cover 9 and the bottom cover 14 to move in opposite directions, so that the distance between the fixed cover 9 and the bottom cover 14 is reduced until the distance between the fixed cover 9 and the bottom cover 14 remains unchanged. As the winding shaft 24 continues to rotate, the winding shaft 24 moves up under the traction of the pull rope 25, and pushes the limiting piece 23 to move up, compressing the fourth spring. At this time, the load on the sample is controlled according to the compression amount of the fourth spring, and then the sample is connected to the middle connection piece 13 and the bottom cover 14 and placed in the detection shell 1 together, thereby completing the placement of the sample.

[0059] After the sample is placed, the test personnel inject seawater into the detection shell 1 through the water pump 2, and stop the water pump 2 until the seawater level is coplanar with the upper side of the detection shell 1, start the air pump 7 and supply air to the sealing transfer ring 19, and the air pump 7 conveys the gas to the upper part of the installation shell 16 through the sealing transfer ring 19 and the air inlet 161. The air pressure in the upper part of the installation shell 16 increases and pushes the seal 18 downward, so that the lower side of the seal 18 passes over the exhaust port 162. At this time, the gas in the installation shell 16 enters the sealing bag 15 through the exhaust port 162, so that the sealing bag 15 expands and contacts the arc-shaped groove 151, completing the sealing of the fixed cover 9 and the sealing bag 15. Then the test personnel stop the air pump 7 (at this time, the seal 18 moves up and resets under the action of the second spring) and start the electric push rod 3, increase the pressure of the seawater in the detection shell 1 by extending the telescopic end of the electric push rod 3, and monitor the seawater pressure in real time through the sensor 6 to control the telescopic end of the electric push rod 3 to extend and retract in real time.

[0060] After adjusting the pressure of the seawater, wait for a while to allow the seawater to immerse in the sample, then the test personnel temporarily reset the telescopic end of the electric push rod 3 and press the pressing piece 17. The pressing piece 17 drives the sealing piece 18 to move downward through the third spring, so that the lower side of the sealing piece 18 passes over the exhaust port 162. At the same time, the rectangular through groove 171 connects the interior of the mounting shell 16 with the outside world. Under the elastic reset action of the sealing bag 15, the gas in the sealing bag 15 is discharged through the exhaust port 162, the mounting shell 16 and the rectangular through groove 171. Then the test personnel release the pressing piece 17, and under the reset action of the second spring, the sealing piece 18 and the pressing piece 17 are reset, thereby releasing the seal between the sealing bag 15 and the fixed cover 9.

[0061] The sample personnel lift up the fixed cover 9, and the fixed cover 9 drives the first sample and the second sample to move up together. When the first sample is completely moved out of the detection shell 1 (that is, the lower side of the middle connecting piece 13 is coplanar with the upper side inside the detection shell 1), the sealing bag 15 is controlled by the air pump 7 to expand and contact with the annular groove 152 of the middle connecting piece 13 to complete the sealing of the detection shell 1. Then, the air pump 7 is used to supply air to the cleaning transfer ring 8, and the flow rate of the air pump 7 is controlled to be first large and then small, so that the gas is first blown along the surface of the first sample and then blown parallel to the central axis of the first sample. After the first sample is dried by the air flow for a certain period of time, the above-mentioned step of pressing the pressing piece 17 is repeated to reset the fixed cover 9, and a dry-wet alternating cycle is completed.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A concrete sample water erosion test device, characterized in that: include: A base (101), the base (101) being fixedly connected to a detection shell (1), a water pump (2) and an electric push rod (3) being installed in the base (101), a telescopic end of the electric push rod (3) passing through the detection shell (1) and being sealingly and slidably connected thereto, and the water pump (2) being in communication with the interior of the detection shell (1); A slide cylinder (4) is fixedly connected in the detection shell (1), a piston plate (5) is sealingly and slidably connected in the slide cylinder (4), and a first spring is fixedly connected between the telescopic end of the electric push rod (3) and the piston plate (5); A sensor (6) is installed in the detection shell (1) and is used to monitor the water pressure in the detection shell (1); An air pump (7) is mounted on the detection housing (1); the air pump (7) is connected to a cleaning transfer ring (8); a fixed cover (9) is provided on the detection housing (1); an annular flow channel (901) is provided in the fixed cover (9); the cleaning transfer ring (8) is connected to the annular flow channel (901) via a first conduit; Also includes: A film (10) is fixedly connected to the fixed cover (9), and the fixed cover (9) is provided with an annular guide surface (902); A sealing ring (11) fixedly connected to the film (10), wherein the height of the lowest point of the sealing ring (11) is lower than the height of the annular guide surface (902); The piston rod (12) is fixedly connected to the sealing ring (11); a stepped through hole is provided on the fixed cover (9); and the piston rod (12) slides in a sealed manner in the stepped through hole of the fixed cover (9).

2. A concrete sample water erosion test device according to claim 1, characterized in that: Also includes: A middle connector (13) is arranged in the detection shell (1), a bottom cover (14) is arranged in the detection shell (1), and a sealing capsule (15) is fixedly connected to a position of the detection shell (1) close to the fixed cover (9); A mounting shell (16) is fixedly connected to the detection shell (1); an air inlet (161) and an air outlet (162) are provided on the mounting shell (16); the air outlet (162) is communicated with the sealing capsule (15); a pressing member (17) is limited in position and sealingly slidably connected inside the mounting shell (16); the pressing member (17) is provided with a rectangular through groove (171); the rectangular through groove (171) is used to control the communication relationship between the mounting shell (16) and the outside; a sealing member (18) is limited in position and sealingly slidably connected inside the pressing member (17); the sealing member (18) is sealingly slidably connected to the mounting shell (16); a second spring is fixedly connected between the sealing member (18) and the mounting shell (16); and a third spring is fixedly connected between the pressing member (17) and the sealing member (18); A sealing transfer ring (19) is fixedly connected to the detection housing (1) and is in communication with the air pump (7); the sealing transfer ring (19) is in communication with the air inlet (161).

3. A concrete sample water erosion test device according to claim 2, characterized in that: The elastic coefficient of the second spring between the sealing member (18) and the mounting shell (16) is greater than the elastic coefficient of the third spring between the pressing member (17) and the sealing member (18).

4. A concrete sample water erosion test device according to claim 2, characterized in that: The fixed cover (9) is provided with an arc-shaped groove (151), and the middle connecting piece (13) and the bottom cover (14) are both provided with an annular groove (152), and the arc-shaped groove (151) and the annular groove (152) are both in contact with and matched with the sealing bag (15).

5. A concrete sample water erosion test device according to claim 4, characterized in that: Also includes: A cleaning ring (20) is fixedly connected to a position of the detection housing (1) close to the fixed cover (9); the fixed cover (9), the intermediate connecting piece (13) and the bottom cover (14) are all extruded and matched with the cleaning ring (20).

6. A concrete sample water erosion test device according to claim 5, characterized in that: Also includes: The guide frame (21) is fixedly connected to a position of the detection shell (1) close to the fixed cover (9), and a guide inclined surface (211) is provided on the middle connecting piece (13).

7. A concrete sample water erosion test device according to claim 6, characterized in that: The middle connecting piece (13) is provided with a drainage hole (212).

8. A concrete sample water erosion test device according to claim 7, characterized in that: Also includes: A sliding shaft (22) is fixedly connected to the lower side of the bottom cover (14); the sliding shaft (22) is limitedly slidably connected to a limiting member (23); a fourth spring is fixedly connected between the limiting member (23) and the bottom cover (14); A winding shaft (24) is slidably and rotatably connected to the sliding shaft (22), a pull rope (25) is fixedly connected to the winding shaft (24), and the pull rope (25) passes through the limiting member (23), the bottom cover (14) and the middle connecting member (13) in sequence and is then fixedly connected to the fixed cover (9); The elastic sheet (26) is fixedly connected to the winding shaft (24); the limiting member (23) is provided with a limiting groove (261); the limiting groove (261) is in limiting cooperation with the elastic sheet (26).

9. A concrete sample water erosion test device according to claim 8, characterized in that: The pull rope (25) passes through the annular groove (152) on the middle connecting piece (13) and the annular groove (152) on the bottom cover (14), and the pull rope (25) contacts and cooperates with the sealing bag (15).

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