Water insensitivity testing equipment for mixed slurry

Abstract

The utility model relates to the technical field of material science and engineering, in particular to water insensitivity testing equipment for mixed slurry, and aims to solve the problems that the degree of crosslinking of the slurry is increased within the time from mixing to pouring into water due to time interval caused by separation of a stirring and mixing procedure and a grouting procedure in the related technology, and the water insensitivity of the slurry is influenced. Therefore, the water insensitivity of the slurry is enhanced, and the accuracy of a test result is influenced. The water insensitivity testing equipment comprises a double-liquid grouting mechanism and a mold. According to the water insensitivity testing equipment, through the feeding assembly, the mixing assembly and the grouting assembly which are communicated in sequence, continuous stirring and discharging of mixed slurry can be achieved, the time interval is shortened, the time interval caused by separation of a stirring and mixing procedure and a grouting procedure in an existing underwater forming test is overcome, and the water insensitivity testing efficiency is improved. The cross-linking degree of the slurry is increased within the time from mixing to pouring into water, so that the water insensitivity of the slurry is enhanced, and the accuracy of a test result is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of material science and engineering, in particular to a water insensitivity testing device for mixed slurry. Background Art

[0002] Underwater molding is a prerequisite for evaluating a material's performance in underwater environments. Water insensitivity testing involves two separate steps: first, mixing components A and B to form a reactive slurry; second, pouring the slurry into a mold. Water insensitivity is assessed by measuring indicators such as bubble area on the surface of the cured specimen and the density or strength of the cured product. Due to the time lag between mixing and pouring, the slurry's crosslinking increases, enhancing water insensitivity and affecting the accuracy of the test results.

[0003] Existing underwater forming tests suffer from a technical issue: the separation of the mixing and grouting steps results in a time gap. This causes the slurry to crosslink more between mixing and pouring into water, leading to increased water insensitivity and, consequently, compromising the accuracy of test results. This effect is particularly significant for fast-curing materials. Utility Model Content

[0004] The purpose of the utility model is to provide a water insensitivity testing device for mixed slurries, so as to solve the technical problem in the related art that due to the time interval caused by the separation of the stirring and mixing process and the grouting process, the cross-linking degree of the slurry increases from the time after mixing to the time when it is poured into water, thereby increasing the water insensitivity of the slurry and affecting the accuracy of the test results.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0006] The water insensitivity testing equipment provided by the utility model comprises:

[0007] A dual-liquid grouting mechanism and mold. The dual-liquid grouting mechanism includes a feed assembly, a mixing assembly, and a grouting assembly, which are sequentially connected. The mixing assembly is used to stir the independent components A and B delivered by the feed assembly to form a mixed slurry, and the mixed slurry is directly delivered to the mold through the grouting assembly.

[0008] Specifically, the feeding assembly includes a first feeding unit and a second feeding unit. The first feeding unit includes a first delivery pump and a first material barrel. The second feeding unit includes a second delivery pump and a second material barrel. One end of the first delivery pump is connected to the mixing assembly and the other end is connected to the first material barrel. One end of the second delivery pump is connected to the mixing assembly and the other end is connected to the second material barrel.

[0009] Specifically, the mixing assembly includes a three-way connector and a mixing unit. The three-way connector is provided with a first feed port, a second feed port, and a discharge port, which are respectively connected to the first feeding unit, the second feeding unit, and the grouting assembly. The mixing unit is mounted on the three-way connector and is used to mix and stir the materials delivered by the first feeding unit and the second feeding unit.

[0010] Specifically, the mixing unit includes a stirring shaft, a stirring blade, and a motor. The stirring blade is mounted on the stirring shaft, the stirring shaft is rotatably connected to the three-way connector, and the motor is used to drive the stirring shaft to rotate.

[0011] Specifically, the mixing unit further includes a one-way valve. Two one-way valves are respectively installed at the first feed port and the second feed port to limit the movement of the mixed slurry to the first feeding unit and the second feeding unit.

[0012] Specifically, the mixing unit further comprises a partition plate, which is mounted on the discharge port. The partition plate is provided with a plurality of mixing holes, and the turbulence generated by the flow through the mixing holes is used to further mix the mixed slurry.

[0013] Specifically, the grouting assembly includes a grouting nozzle, a grouting pipe, and a mixer; the grouting nozzle, the mixer, and the discharge port are sequentially connected through the grouting pipe. The mixer is used to continuously mix the mixed slurry.

[0014] Specifically, it also includes a water holding mechanism, which includes a water storage tank. The mold is arranged in the water storage tank. The water storage tank is provided with an overflow hole, and the height of the overflow hole is higher than the mold.

[0015] Specifically, the grouting assembly further includes a grouting arm, which includes a fixed frame and a lifting frame. The fixed frame is mounted on the water storage tank, the grouting nozzle is detachably connected to the lifting frame, and the lifting frame is movably connected to the fixed frame to drive the grouting nozzle to move in the vertical and horizontal directions.

[0016] Specifically, it also includes a support frame, and the dual-liquid grouting mechanism is installed on the support frame.

[0017] Based on the above technical solutions, the beneficial effects of the present invention are analyzed as follows:

[0018] The utility model provides a water insensitivity testing device for mixed slurry, comprising:

[0019] A double-liquid grouting mechanism and a mold; the double-liquid grouting mechanism includes a feeding component, a mixing component and a grouting component that are connected in sequence; the mixing component is used to stir the AB independent components delivered by the feeding component to form a mixed slurry, and directly deliver the mixed slurry to the mold containing water through the grouting component.

[0020] In specific applications, two independent components, A and B, are fed into the mixing assembly via the feeding assembly for mixing. Due to the direct connection between the mixing assembly and the grouting assembly, the mixing and grouting processes can be completed continuously, shortening the time interval. The mixed slurry is then rapidly injected into the mold containing water. The specimen is stored in the water-retaining mechanism 300 and cured until fully cured. After curing, it is demolded and the molded surface is observed using an optical magnification device. The maximum bubble size and the number of bubbles with a diameter of 2 to 5 mm and a diameter greater than 5 mm are counted. This information is used to evaluate the material's water insensitivity, density retention, and strength retention.

[0021] It can be seen that compared with the existing technology, the water insensitivity testing equipment can realize continuous stirring and discharging of the mixed slurry through the sequentially connected feeding component, the mixing component and the grouting component, shorten the time interval, and overcome the technical problem that the time interval caused by the separation of the stirring and mixing process and the grouting process in the existing underwater forming test increases the cross-linking degree of the slurry from the time of mixing to the time of pouring into water, thereby enhancing the water insensitivity of the slurry, and further affecting the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 The overall structure of the water insensitivity test device provided by the embodiment of the utility model is schematically shown. Figure 1 ;

[0024] Figure 2 Schematic diagram of the overall structure of the water insensitivity test equipment Figure 2 ;

[0025] Figure 3 Schematic diagram of the overall structure of the water insensitivity test equipment Figure 3 ;

[0026] Figure 4 is a schematic cross-sectional view of the water insensitivity testing device;

[0027] Figure 5 It is a schematic diagram of the cross-section structure of the double-liquid grouting mechanism;

[0028] Figure 6 It is a structural diagram of the water holding mechanism;

[0029] Figure 7 It is a structural diagram of the grouting arm;

[0030] Figure 8 Schematic diagram of the structure of the mixing component;

[0031] Figure 9 Schematic diagram of the cross-section structure of the mixing component;

[0032] Figure 10 Schematic diagram of the cross-section structure of the mixer.

[0033] icon:

[0034] 100, dual-liquid grouting mechanism; 110, feeding assembly; 111, first feeding unit; 1111, first delivery pump; 1112, first material barrel; 112, second feeding unit; 1121, second delivery pump; 1122, second material barrel; 120, mixing assembly; 121, three-way connector; 101, first feed port; 102, second feed port; 103, discharge port; 122, mixing unit; 1221, stirring shaft; 1222, stirring blade; 1223, motor; 123, one-way valve; 124, partition plate; 104, mixing hole; 130, grouting assembly; 131, grouting nozzle; 132, grouting pipe; 133, mixer; 134, grouting arm; 1341, fixing frame; 1342, lifting frame;

[0035] 200, mold;

[0036] 300, water storage mechanism; 310, water storage tank; 301, overflow hole; 320, water supply connector;

[0037] 400. Support frame. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0040] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0041] Existing underwater forming tests have a technical problem: due to the time interval caused by the separation of the stirring and mixing process and the grouting process, the cross-linking degree of the slurry increases between the time of mixing and pouring into water, thereby increasing the water insensitivity of the slurry and affecting the accuracy of the test results.

[0042] In view of this, the present invention provides a water insensitivity testing device for mixed slurry, comprising:

[0043] A double-liquid grouting mechanism 100 and a mold 200; the double-liquid grouting mechanism 100 includes a feeding component 110, a mixing component 120 and a grouting component 130 that are connected in sequence; the mixing component 120 is used to stir the AB independent components delivered by the feeding component 110 to form a mixed slurry, and directly deliver the mixed slurry to the mold 200 through the grouting component 130.

[0044] Based on the above technical solutions, the water insensitivity testing equipment provided by the present invention can achieve the following technical effects:

[0045] The water insensitivity testing equipment can realize continuous stirring and discharging of the mixed slurry through the feeding component 110, the mixing component 120 and the grouting component 130 connected in sequence, shortening the time interval and overcoming the technical problem that the time interval caused by the separation of the stirring and mixing process and the grouting process in the existing underwater forming test increases the cross-linking degree of the slurry from the time of mixing to the time of pouring into water, thereby increasing the water insensitivity of the slurry and affecting the accuracy of the test results.

[0046] The following combination Figures 1 to 7 The structure and shape of the water insensitivity testing device provided in this embodiment are described in detail:

[0047] In this embodiment, the water-insensitivity testing equipment further includes a water-holding mechanism 300, comprising a water tank 310 and a water supply connector 320. The mold 200 is positioned within the water tank 310, with the water supply connector 320 mounted at both the inlet and outlet of the water tank 310. The water tank 310 is provided with an overflow hole 301, which is located higher than the mold 200. Water is poured into the water tank 310 through the water supply connector 320, and water above the overflow hole 301 flows out of the overflow hole 301. This maintains a constant liquid level within the water tank 310, limiting irrelevant variables and preventing variations in water pressure from interfering with the experimental data.

[0048] Regarding the structural composition of the feeding assembly 110, specifically:

[0049] The feeding assembly 110 includes a first feeding unit 111 and a second feeding unit 112. The first feeding unit 111 includes a first feed pump 1111 and a first material barrel 1112. The second feeding unit 112 includes a second feed pump 1121 and a second material barrel 1122. The first feed pump 1111 is connected to the mixing assembly 120 at one end and to the first material barrel 1112 at the other end. The second feed pump 1121 is connected to the mixing assembly 120 at one end and to the second material barrel 1122 at the other end. The feed direction of the first material barrel 1112 forms a preset angle with the axis of the first feed pump 1111 to avoid the motor of the first feed pump 1111. The feed direction of the second material barrel 1122 forms a preset angle with the axis of the second feed pump 1121 to avoid the motor of the second feed pump 1121. The first feed pump 1111 and the second feed pump 1121 can be configured as screw pumps.

[0050] In the solution of this embodiment, the water insensitivity testing device also includes a support frame 400, which includes a frame body and a support base, and a first delivery pump 1111 and a second delivery pump 1121 are respectively mounted on the support base. The first delivery pump 1111 is tilted as a whole so that the feed direction of the independent component A from the first barrel 1112 into the first delivery pump 1111 is in the same direction as gravity, thereby reducing the required feed consumption. The second delivery pump 1121 is tilted as a whole so that the feed direction of the independent component B from the second barrel 1122 into the second delivery pump 1121 is in the same direction as gravity, thereby reducing the required feed consumption.

[0051] Regarding the structure of the mixing assembly 120, specifically:

[0052] The mixing assembly 120 includes a three-way connector 121 and a mixing unit 122. The three-way connector 121 is provided with a first feed port 101, a second feed port 102, and a discharge port 103, which are connected to the first feeding unit 111, the second feeding unit 112, and the grouting assembly 130, respectively. The mixing unit 122 is mounted on the three-way connector 121 and is used to mix and stir the materials delivered by the first feeding unit 111 and the second feeding unit 112. The independent components AB input from the first feed port 101 and the second feed port 102 are stirred into a mixed slurry by the mixing unit 122 and then enter the grouting assembly 130 through the discharge port 103.

[0053] Regarding the structure of the mixing unit 122, specifically:

[0054] The mixing unit 122 includes a stirring shaft 1221, stirring blades 1222, and a motor 1223. The stirring blades 1222 are mounted on the stirring shaft 1221, the stirring shaft 1221 is rotatably connected to the three-way connector 121, and the motor 1223 is used to drive the stirring shaft 1221 to rotate.

[0055] To prevent the mixed slurry from flowing back and contaminating the independent components A and B in the first feeding unit 111 and the second feeding unit 112, in the solution of this embodiment, the mixing unit 122 further includes a one-way valve 123. The two one-way valves 123 are respectively installed at the first feeding port 101 and the second feeding port 102 to limit the movement of the mixed slurry into the first feeding unit 111 and the second feeding unit 112. The one-way valve 123 can be configured as a spring-loaded inline one-way valve, a ball one-way valve, or a diaphragm one-way valve.

[0056] In the solution of this embodiment, the mixing unit 122 further includes a partition plate 124, which is installed at the discharge port 103. The partition plate 124 is provided with a plurality of mixing holes 104. When the mixed slurry flows through the mixing holes 104, turbulence is generated in the mixed slurry to further mix the mixed slurry.

[0057] Specifically, when the mixed slurry flows through the mixing holes 104 of the partition plate 124, the design of these small holes forces the fluid to pass through a narrower channel. Since the fluid itself is already unstable, the design of this narrow channel will aggravate the disturbance of the fluid. When the fluid passes through the mixing holes 104, its speed and direction will change, resulting in local high-speed areas and low-speed areas. These changes cause violent interactions between the micro-clusters inside the fluid, forming a complex flow pattern. Under the action of these mixing holes 104, the fluid micro-clusters not only move in the mainstream direction, but also produce irregular pulsations in other directions. These pulsations cause frequent mixing and exchange between fluid micro-clusters, thereby generating turbulence. The movement of fluid micro-clusters in turbulent flow is random, and the momentum, heat and mass transfer rate brought about by this randomness is much higher than that of laminar flow, so the mixing efficiency is significantly improved.

[0058] Regarding the structural composition of the grouting assembly 130, specifically:

[0059] like Figure 4 As shown, the grouting assembly 130 includes a grouting nozzle 131, a grouting pipe 132, and a mixer 133. The grouting nozzle 131, the mixer 133, and the discharge port 103 are sequentially connected through the grouting pipe 132. The mixer 133 continuously mixes the mixed slurry during the entire process of being transported from the discharge port 103 through the grouting assembly 130 to the mold 200. The mixer 133 is configured as a spiral mixer.

[0060] During underwater molding, the slurry is poured into the water-filled mold 200, which often results in bubbles in the corners. Furthermore, the test specimens are relatively small, which increases the test error and reduces the reproducibility and repeatability of the test data.

[0061] In order to avoid bubbles formed in the corners when the mixed slurry fills the mold 200, which leads to increased test errors and reduced reproducibility and repeatability of experimental data, in the scheme of this embodiment, during the grouting process, the grouting nozzle 131 is inserted into the bottom of the mold 200, so that the slurry starts to be injected from the bottom of the mold 200, and the grouting nozzle 131 is gradually lifted as the liquid level of the mixed slurry rises, and the outlet of the grouting nozzle 131 should be kept inside the mixed slurry.

[0062] In order to further improve the efficiency of the grouting process, in the solution of this embodiment, Figure 7As shown, the grouting assembly 130 also includes a grouting arm 134, which includes a fixed frame 1341 and a lifting frame 1342. The fixed frame 1341 is mounted on the water tank 310, and the grouting nozzle 131 is detachably connected to the lifting frame 1342. The lifting frame 1342 is movably connected to the fixed frame 1341 to drive the grouting nozzle 131 to move in the vertical and horizontal directions. The detachable connection between the grouting nozzle 131 and the lifting frame 1342 can be configured as a snap connection, a threaded connection, or a pin connection. The driving mode of the lifting frame 1342 can be configured as manual or electric.

[0063] Water insensitivity judgment standard: Taking the mold 200 with dimensions of 2 cm in height, 10 cm in width and 10 cm in length as an example, if the number of bubbles with a diameter greater than 5 mm is ≥5, it is judged as unqualified; if the number of bubbles with a diameter between 2 and 5 mm is ≥10, it is judged as unqualified; if the number of bubbles with a diameter greater than 5 mm is <4 and the number of bubbles with a diameter between 2 and 5 mm is <10, it is judged as qualified.

[0064] Strength retention rate judgment criteria:

[0065] Strength retention is calculated as the ratio of the density of a sample molded in water to the strength of a sample molded in air. For example, a polyurethane slurry used to treat road mud and mud problems would be considered unqualified if its strength retention is less than 80%, while a strength retention of 80% or more would be considered acceptable.

[0066] Density retention rate judgment criteria:

[0067] Density retention is calculated as the ratio of the density of a sample formed in water to the density of a sample formed in air. For example, a density retention rate of less than 80% for polyurethane slurry used to treat road mud and mud problems is considered unacceptable, while a density retention rate of 80% or higher is considered acceptable.

[0068] In summary, the specific working process of the water insensitivity testing device provided in this embodiment is as follows:

[0069] Take the lifting frame 1342 as an example, which is slidably connected to the fixing frame 1341 in the vertical and horizontal directions;

[0070] Water filling preparation: Place the mold 200 in the water tank 310 and fill it with water until the water level is flush with the overflow hole 301;

[0071] Grouting test: Turn on the first delivery pump 1111, the second delivery pump 1121, and the motor 1223 of the mixing unit 122. The independent components AB are stirred into a mixed slurry by the mixing unit 122 and then discharged along the grouting assembly 130. The operator holds the grouting nozzle 131 and allows the grouting nozzle 131 to continuously discharge slurry for more than 5 seconds. The dual-liquid grouting mechanism 100 is paused and the grouting nozzle 131 is installed on the lifting frame 1342. At this time, the lifting frame 1342 is at the lowest point and the grouting nozzle 131 is at the bottom of the mold 200.

[0072] Specimen casting: Open the dual-liquid grouting mechanism 100 again, and start grouting the mixed slurry from the bottom of the mold 200. As the liquid level of the mixed slurry rises, the motor drives the lifting frame 1342 to gradually move upward along the fixed frame 1341 to increase the height of the grouting nozzle 131. The outlet of the grouting nozzle 131 remains inside the mixed slurry throughout the process until the liquid level is flush with the upper surface of the mold 200. Stop grouting and scrape off the mixed slurry above the upper surface of the mold 200.

[0073] Specimen curing and data statistics: Wait for the specimen in the mold 200 to be completely cured before demolding, use optical magnification equipment to observe the molding surface of the specimen, count the maximum bubble size and the number of bubbles with a diameter of 2 to 5 mm and the number of bubbles with a diameter greater than 5 mm, and test the molding strength and molding density of the underwater molded specimen.

[0074] Determination of underwater forming performance of materials: Determine whether the underwater forming performance of materials is qualified based on the technical requirements of the current application scenario.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water insensitivity testing device for mixed slurries, characterized in that: include: A double-liquid grouting mechanism (100) and a mold (200); the double-liquid grouting mechanism (100) comprises a feeding assembly (110), a mixing assembly (120) and a grouting assembly (130) which are connected in sequence; the mixing assembly (120) is used to stir the A and B independent components delivered by the feeding assembly (110) to form a mixed slurry, and to deliver the mixed slurry directly to the mold (200) through the grouting assembly (130).

2. The water insensitivity testing device according to claim 1, characterized in that: The feeding assembly (110) comprises a first feeding unit (111) and a second feeding unit (112); the first feeding unit (111) comprises a first delivery pump (1111) and a first material barrel (1112); the second feeding unit (112) comprises a second delivery pump (1121) and a second material barrel (1122); one end of the first delivery pump (1111) is connected to the mixing assembly (120), and the other end is connected to the first material barrel (1112); one end of the second delivery pump (1121) is connected to the mixing assembly (120), and the other end is connected to the second material barrel (1122).

3. The water insensitivity testing device according to claim 2, characterized in that: The mixing assembly (120) comprises a three-way connector (121) and a mixing unit (122); the three-way connector (121) is provided with a first feed port (101), a second feed port (102) and a discharge port (103), which are respectively connected to the first feeding unit (111), the second feeding unit (112) and the grouting assembly (130); the mixing unit (122) is installed on the three-way connector (121) and is used to mix and stir the materials transported by the first feeding unit (111) and the second feeding unit (112).

4. The water insensitivity testing device according to claim 3, characterized in that: The mixing unit (122) comprises a stirring shaft (1221), a stirring paddle (1222) and a motor (1223); the stirring paddle (1222) is mounted on the stirring shaft (1221), the stirring shaft (1221) is rotatably connected to the three-way connector (121), and the motor (1223) is used to drive the stirring shaft (1221) to rotate.

5. The water insensitivity testing device according to claim 3, characterized in that: The mixing unit (122) further includes a one-way valve (123); two one-way valves (123) are respectively installed at the first feed port (101) and the second feed port (102) to limit the movement of the mixed slurry toward the first feeding unit (111) and the second feeding unit (112).

6. The water insensitivity testing device according to claim 3, characterized in that: The mixing unit (122) further comprises a partition plate (124), which is mounted on the discharge port (103); the partition plate (124) is provided with a plurality of mixing holes (104), and the turbulence generated by the flow through the mixing holes (104) is used to further mix the mixed slurry.

7. The water insensitivity testing device according to claim 3, characterized in that: The grouting assembly (130) comprises a grouting nozzle (131), a grouting pipe (132) and a mixer (133); the grouting nozzle (131), the mixer (133) and the discharge port (103) are sequentially connected through the grouting pipe (132); and the mixer (133) is used to continuously mix the mixed slurry.

8. The water insensitivity testing device according to claim 7, characterized in that: The invention also includes a water storage mechanism (300), wherein the water storage mechanism (300) includes a water storage tank (310), the mold (200) is arranged in the water storage tank (310), and the water storage tank (310) is provided with an overflow hole (301), and the height of the overflow hole (301) is higher than that of the mold (200).

9. The water insensitivity testing device according to claim 8, characterized in that: The grouting assembly (130) further includes a grouting arm (134), and the grouting arm (134) includes a fixing frame (1341) and a lifting frame (1342); the fixing frame (1341) is installed on the water storage tank (310), the grouting nozzle (131) is detachably connected to the lifting frame (1342), and the lifting frame (1342) is movably connected to the fixing frame (1341) to drive the grouting nozzle (131) to move in the vertical and horizontal directions.

10. The water insensitivity testing device according to claim 1, characterized in that: It also includes a support frame (400), and the dual-liquid grouting mechanism (100) is installed on the support frame (400).

Images