Testing device for detecting concrete reflux pumping filling effect

Abstract

The utility model discloses a test device for detecting the filling effect of a concrete reflux pump, which comprises a bottom plate, a pump pipe connecting port, a pump pipe connecting port and a pump pipe connecting port, and the visual arc-shaped box type part is connected with the bottom plate, the pump pipe access port is communicated with the visual arc-shaped box type part, and exhaust holes are formed in the two sides of the visual arc-shaped box type part towards the highest point. The testing device for detecting the concrete reflux pumping filling effect provided by the utility model solves the problems that the existing testing device cannot carry out large-scale multiple tests and exploration due to the influence of factors such as the number of modeling test sections, the site, the cost and the time, the determined technical indexes are limited to be met, the optimal effect cannot be achieved, and the testing efficiency is poor. In order to solve the problems of low cost, high economic cost and time cost and the like, the test device disclosed by the utility model can be used for intuitively feeling the filling and pouring of the concrete to the closed space caused by different working performances and different pumping settings of the concrete in the pouring process.

Description

Technical Field

[0001] This utility model relates to the field of test devices for detecting concrete filling, and the test device for detecting the filling effect of concrete backflow pumping can be applied to detect the filling effect of concrete backflow pumping. Background Technology

[0002] In the design of concrete pouring schemes for concealed structures such as the annular lining of railway tunnel arches, using a pump-pressurized reverse-flow pouring structure to allow the concrete to self-level is a conventional pouring method. To achieve a dense filling effect, the determination of several technical indicators is crucial: the workability of the concrete itself (including slump, fluidity, uniformity, etc.), the number of pump pipes, the pumping direction, the pumping pressure and discharge rate, and the pouring process. Determining these technical indicators requires experimental verification.

[0003] The conventional approach to testing and verification involves creating a model test section. After theoretical analysis, concrete production and pumping are carried out according to several predetermined indicators. Then, the formwork is removed to verify the quality of the concrete pouring. This is done in conjunction with the model test section, followed by physical damage testing. However, due to factors such as the number of model test sections, site conditions, cost, and time, large-scale, multiple tests are often not feasible. The determined technical indicators are often only barely met, failing to achieve the best results and incurring high economic and time costs.

[0004] Therefore, there is an urgent need to develop a device that can repeatedly simulate pump-pressure backflow pouring tests in enclosed spaces such as the annular lining of railway tunnel arches. Using this device, the appropriate workability of concrete (mainly slump, spread, and uniformity) required for structural construction can be determined through intuitive perception of the filling effect. This allows for the identification of suitable pump pressure, flow rate matching, pump pipe layout and orientation, and other pouring techniques during construction. This will help determine the above technical indicators, ensure the quality of concrete pouring for structural construction, reduce economic costs, and save construction time. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a test device for detecting the backflow pumping filling effect of concrete. This device solves the problems of existing test devices being unable to conduct large-scale, multiple tests due to factors such as the number of modeling test sections, site conditions, cost, and time constraints. The determined technical indicators are often only barely met, failing to achieve optimal results, and incurring high economic and time costs.

[0006] To solve the above-mentioned technical problems, this utility model provides a test device for detecting the backflow pumping filling effect of concrete, comprising:

[0007] Base plate, including pump pipe inlet;

[0008] The visualized arc-shaped box section is connected to the base plate, and the pump pipe inlet is connected to the visualized arc-shaped box section. Exhaust holes are provided on both sides of the visualized arc-shaped box section towards the highest point.

[0009] Optionally, the visualized arc-shaped box section is made of transparent glass.

[0010] Optionally, the glass is high-strength explosion-proof glass.

[0011] Optionally, the base plate is a steel plate.

[0012] Optionally, the pump pipe inlet is connected to an adjustable-orientation pump pipe, and the pump pipe is movably connected to the pump pipe inlet.

[0013] Optionally, the pump pipe is threadedly connected to the pump pipe inlet.

[0014] Optionally, a control valve is provided on the pump pipe.

[0015] Optionally, the number of exhaust holes is 2, and the size is 10mm*10mm.

[0016] Optionally, the visual arc-shaped box section is bolted to the base plate, and the connection between the visual arc-shaped box section and the base plate is sealed with a rubber gasket.

[0017] Optionally, the visualized arc-shaped box section is composed of multiple movable plates bolted together, and the connection points of the multiple movable plates are sealed with rubber gaskets.

[0018] The testing device for detecting the backflow pumping filling effect of concrete provided in this embodiment of the invention has the following advantages compared with the prior art:

[0019] This utility model provides a test device for detecting the backflow pumping filling effect of concrete. The device includes a base plate with a pump pipe inlet and a visual arc-shaped box section connected to the base plate. The pump pipe inlet is connected to the visual arc-shaped box section, and vent holes are provided on both sides of the box section towards its highest point. Using this test device, one can intuitively observe the filling effect of concrete on a confined space caused by different workability properties of the concrete and different pumping settings during the pouring process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are drawings in some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a test device for detecting the backflow pumping filling effect of concrete in one embodiment of the present invention.

[0022] Figure label:

[0023] 1- Test apparatus for detecting the backflow pumping filling effect of concrete;

[0024] 10-Base plate;

[0025] 20-Visualized curved box-shaped section;

[0026] 101 - Pump pipe inlet; 102 - Pump pipe; 103 - Control valve;

[0027] 201 - Exhaust port. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] As described in the prior art, existing testing devices for detecting the filling effect of concrete backflow pumps mainly employ a test section approach. This involves creating a proportionally scaled test section or directly designating a section from the engineering structure as the test section for concrete pouring tests. Theoretical assumptions or engineering experience are made regarding the workability of certain concrete, and specific pumping conditions are used for pouring. The overall filling quality is then inspected by demolding or damage testing. However, this approach has limitations in the number of tests, low tolerance for error, long testing times, and irreversible quality repairs due to damage to the concrete structure.

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] As described below, this utility model provides a test device for detecting the backflow pumping filling effect of concrete.

[0032] Figure 1 This is a three-dimensional structural schematic diagram of a test device for detecting the backflow pumping filling effect of concrete in one embodiment of the present invention.

[0033] Please refer to Figure 1 This utility model provides a test device 1 for detecting the backflow pumping filling effect of concrete, including: a base plate 10, including a pump pipe inlet 101; a visual arc-shaped box section 20, the visual arc-shaped box section 20 being connected to the base plate 10, the pump pipe inlet 101 being connected to the visual arc-shaped box section 20, and exhaust holes 201 being provided on both sides of the visual arc-shaped box section 20 towards the highest point.

[0034] Specifically, during use, the concrete to be tested can be pumped in through the pump pipe inlet 101, and the filling quality of the internal concrete can be directly observed through the visual arc-shaped box section 20. Excess gas in the concrete can be discharged through the vent 201. Using this test device, one can intuitively feel the filling of the confined space by the concrete due to different workability of the concrete and different pumping settings during the pouring process.

[0035] Additionally, it should be noted that the purpose of setting the visual arc-shaped box section 20 to an arc is to make the test device consistent with the tunnel lining structure, which is equivalent to a scaled-down model of the tunnel entity. It also facilitates the adjustment of the relative position of the pump pipe 102 in the visual arc-shaped box section 20.

[0036] Furthermore, the base plate 10 is a steel plate. The pump pipe inlet 101 is connected to an adjustable pump pipe 102, which is movably connected to the pump pipe inlet 101. Specifically, the relative position of the pump pipe 102 within the visual arc-shaped box-type part 20 can be adjusted by the assembly position of the base plate 10 and the box-type part 20. In some embodiments, the pump pipe 102 is threadedly connected to the pump pipe inlet 101. A control valve 103 is provided on the pump pipe 102 to control the sealing of the concrete.

[0037] Furthermore, the visible curved box-shaped section 20 is made of transparent glass. Specifically, in some embodiments, the glass is high-strength explosion-proof glass.

[0038] Furthermore, in some embodiments, the visual arc-shaped box-type part 20 is bolted to the base plate 10, and the connection between the visual arc-shaped box-type part 20 and the base plate 10 is sealed with a rubber gasket.

[0039] Furthermore, in some embodiments, the visualized arc-shaped box-type part 20 is composed of multiple movable plates bolted together, and the connection of the multiple movable plates is sealed with a rubber gasket.

[0040] It should be noted that the visual arc-shaped box section 20 is bolted to the base plate 10. The visual arc-shaped box section 20 is composed of multiple movable plates connected by bolts, which makes disassembly and demolding convenient and can be reused multiple times.

[0041] Furthermore, the number of vent holes 201 is two, and the size is 10mm*10mm. The vent holes 201 can expel air from the visible arc-shaped box section 20, allowing for a direct observation of the filling quality of the sealed space caused by different concrete workability and different pumping settings during the pouring process, and to check the compactness, uniformity, and void degree.

[0042] In addition, it should be noted that the visual arc-shaped box section 20 can intuitively reflect the filling effect of concrete under reverse pumping conditions, and find the optimal workability state of concrete for a certain filling effect, as well as check the uniformity and compaction of concrete in the structure; the adjustable pump pipe 102 can find the optimal pumping conditions of concrete for a certain filling effect, and find the optimal pump pipe connection position and connection direction for a certain filling effect, as well as find the optimal pumping conditions for concrete with different workability, in order to achieve the best filling effect.

[0043] The advantages of this utility model will be further illustrated below through specific practical operation methods.

[0044] 1. Concrete

[0045] The concrete to be tested.

[0046] 2. Test apparatus

[0047] The experimental device of this utility model includes a steel plate with a pump pipe inlet connected to the pump pipe via a thread. The pump pipe is equipped with a control valve. It also includes a visual arc-shaped box-type part connected to the steel plate. The visual arc-shaped box-type part is made of high-strength explosion-proof glass. Two exhaust holes with a size of 10mm*10mm are provided on both sides of the visual arc-shaped box-type part towards the highest point.

[0048] 3. Test Methods

[0049] Once the concrete to be tested is mixed and the required performance indicators are tested, the pump pipe is connected to the concrete pump truck. The required pumping pressure and pumping volume are adjusted, and the concrete is pumped back from bottom to top into the visible arc-shaped box section until the concrete is discharged from the vent at the highest point. Pumping is then stopped and the pump pipe valve is closed.

[0050] 4. Experimental Results

[0051] Effect 1: Visually reflects the filling effect of concrete under reverse-flow pumping conditions.

[0052] Whether the entire visualized arc-shaped box section is filled during the pouring process, whether there are voids, and whether the concrete is layered can all be visually observed through the visualized arc-shaped box section.

[0053] Effect 2: Finding the optimal workability of concrete for a specific filling effect.

[0054] To ensure that the concrete evenly fills the entire visible arc-shaped box section, select concrete spreads of 550mm and 650mm respectively, and conduct filling tests under fixed pumping conditions to compare which spread is easier to achieve. If the 650mm spread is easier to achieve, it can be selected for the construction plan.

[0055] Effect 3: Finding the optimal pumping conditions for concrete to achieve a specific filling effect.

[0056] To ensure that the concrete evenly fills the entire visible arc-shaped box section, pumping pressures of 15 MPa and 30 MPa, and pumping displacements of 30% and 70% were selected respectively. A filling test was conducted with a fixed concrete spread to compare which pumping condition was more achievable. If the pumping condition of 15 MPa and 70% was easier to achieve, it could be determined as the pumping condition selected for that concrete spread in the construction plan.

[0057] Effect 4: Finding the optimal pump pipe connection location and direction for a specific filling effect.

[0058] To ensure that the concrete evenly fills the entire visible arc-shaped box section, select the pump pipe positions at the ends and the middle, respectively, and conduct filling tests to compare which pump pipe position is more likely to achieve the desired result. If the middle position is easier to achieve, it can be selected for the construction plan.

[0059] Effect 5: Finding the optimal pumping conditions for concrete with different workability to achieve the best filling effect.

[0060] To ensure the concrete evenly fills the entire visible curved box section, orthogonal filling tests were conducted with concrete spreads of 550mm and 650mm, pumping pressures of 15MPa and 30MPa, pumping rates of 30% and 70%, and pump pipe positions at the end and middle of the box section, respectively. The optimal pumping conditions for the 550mm and 650mm spread were then determined, and these conditions will be selected for the construction plan.

[0061] Effect 6: Inspect the uniformity and density of concrete in the structure.

[0062] After the filling test is completed, check the aggregate stratification of the concrete. Determine whether there is stratification between the upper and lower layers of aggregate by observing the uniformity of the aggregate in the concrete. Also check for voids in the entire visualized curved box section.

[0063] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A test apparatus for detecting the backflow pumping filling effect of concrete, characterized in that, include: Base plate, including pump pipe inlet; The visualized arc-shaped box section is connected to the base plate, and the pump pipe inlet is connected to the visualized arc-shaped box section. Exhaust holes are provided on both sides of the visualized arc-shaped box section towards the highest point.

2. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 1, characterized in that, The visualized curved box-shaped section is made of transparent glass.

3. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 2, characterized in that, The glass is high-strength explosion-proof glass.

4. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 1, characterized in that, The base plate is a steel plate.

5. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 1, characterized in that, The pump pipe inlet is connected to an adjustable-orientation pump pipe, which is movably connected to the pump pipe inlet.

6. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 5, characterized in that, The pump pipe is threadedly connected to the pump pipe inlet.

7. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 5, characterized in that, The pump pipe is equipped with a control valve.

8. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 1, characterized in that, The number of exhaust holes is 2, and the size is 10mm*10mm.

9. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 1, characterized in that, The visual arc-shaped box section is bolted to the base plate, and the connection between the visual arc-shaped box section and the base plate is sealed with a rubber gasket.

10. The test apparatus for detecting the backflow pumping filling effect of concrete as described in claim 1, characterized in that, The visualized arc-shaped box section is composed of multiple movable plates connected by bolts, and the connection points of the multiple movable plates are sealed with rubber gaskets.

Images