Self-compacting backfill material fluidity detection device

Abstract

The utility model provides a self-compacting backfill material fluidity detection device which comprises a container, the container is of an L-shaped structure composed of a vertical section and a horizontal section, a self-compacting backfill material inlet is formed in the top of the vertical section, and an electric quick-opening ball valve device is arranged at the inlet. The device is improved on the basis of an original L-shaped instrument, electric quick-opening ball valve equipment is adopted as a movable switch of the instrument, opening and closing are more flexible and rapid, different opening degrees of the valve can be set, and the flowing property of the self-compacting backfill material is evaluated from multiple aspects according to the flowing-out speed or flow of the self-compacting backfill material.

Description

Technical Field

[0001] The utility model relates to the technical field of self-compacting backfill materials, in particular to a fluidity detection device for self-compacting backfill materials. Background Art

[0002] Self-compacting backfill material is a special type of concrete. It is made of raw materials such as soil, cementitious materials, admixtures and water, which are evenly mixed in a set ratio to form a material with fluidity, uniformity and stability. Backfill construction does not require external rolling or vibration, and can flow and fill the groove space under the action of its own weight. After solidification, the material meets the engineering performance requirements.

[0003] The fluidity of self-compacting backfill materials is one of the indicators for evaluating their performance. In the prior art, an L-type instrument is usually used for testing. After the front slot of the L-type instrument is filled with self-compacting backfill materials, the movable switch is quickly lifted to allow the self-compacting backfill materials to flow into the horizontal part of the L-type instrument. After the flow stops, the corresponding height is measured and recorded. By comparing the heights on both sides, the index data H2 / H1 is obtained to evaluate the passability of the self-compacting backfill materials.

[0004] In the prior art, most L-type instruments are operated manually, and their active switches are driven by manual pull ropes or simple pneumatic push rods. The opening speed is uneven, the opening process is difficult to be fast and smooth, and the repeatability is poor, which affects the test accuracy of slurry fluidity. On the other hand, L-type instruments can generally only test the flow rate and H2 / H1 test indicators, and cannot fully reflect the flow performance of self-compacting backfill materials.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a self-compacting backfill material fluidity detection device, which is improved on the original L-type instrument and adopts an electric quick-opening ball valve device as the active switch of the instrument. Not only is the opening and closing more flexible and rapid, but the valve can also be set to different opening degrees. According to the outflow rate or flow rate of the self-compacting backfill material, its fluidity performance can be evaluated from multiple aspects.

[0007] In order to achieve the above-mentioned purpose of the utility model, the following technical solutions are specially adopted:

[0008] The utility model provides a self-compacting backfill material fluidity detection device, comprising a container, wherein the container is an L-shaped structure composed of a vertical section and a horizontal section, the top of the vertical section is a self-compacting backfill material inlet, and an electric quick-opening ball valve device is arranged at the inlet.

[0009] The electric rotary ball valve design is more accurate and quicker than the common manual and pneumatic methods, and can be opened and closed within 0.1 seconds, ensuring the continuous and stable inflow of the self-compacting backfill material, and realizing quantitative control of the fluidity test. On the other hand, the rotary ball valve is fully opened by quickly rotating 90°. The utility model can also control the rotation angle of the rotary ball valve to achieve different opening degrees of the valve. By testing and recording the rate and flow rate of the self-compacting backfill material flowing out of the valve at different openings, a curve of the relationship between the rate or flow rate and the valve opening is drawn, and its fluidity performance is further evaluated according to the flatness of the curve.

[0010] Preferably, the electric quick-opening ball valve device includes a driving motor, the driving motor is connected to a ball valve body, the ball valve body includes a rotating ball valve with a through hole and a pressure ring arranged on the upper and lower sides of the rotating ball valve, and a plurality of opening positions are preset on the pressure ring.

[0011] The drive motor can rotate in both directions to realize the opening and closing of the ball valve body through the control of the drive motor. The drive motor controls the opening size of the through hole by adjusting the rotation angle of the rotary ball valve, thereby realizing different opening degrees of the valve. The opening position reserved on the pressure ring can control the opening degree of the ball valve body more quickly and accurately, realize continuous, stable and high-precision control, and meet the needs of quantitative testing and evaluation.

[0012] The electric quick-opening ball valve device also includes a flow meter and a flow rate sensor.

[0013] In order to obtain data on flow and velocity, it is convenient to draw a curve of the relationship between rate or flow and valve opening. In view of the characteristics of self-compacting backfill materials such as being relatively viscous, easy to scale, and having a high particle content, the flow meter is preferably an electromagnetic flow meter, and the flow velocity sensor is preferably a Doppler flow velocity sensor.

[0014] Preferably, a material box is connected to the top of the inlet, a bottom outlet of the material box is completely covered by the ball valve body, and a stirring device is provided at the center of the interior of the material box.

[0015] The material box contains the self-compacting backfill material, and a stirring device is installed inside it to simulate the stirring effect of the mixer truck on the self-compacting backfill material during transportation, which is beneficial to reduce the fluidity loss of the self-compacting backfill material. In addition, the fluidity performance at different initial setting degrees can be tested by controlling the stirring time or stirring degree.

[0016] Preferably, the vertical section and the horizontal section are provided with laser distance measuring equipment, which can accurately record the values ​​of the heights H1 and H2 and transmit them to the control system for data generation.

[0017] Preferably, the vertical section and the horizontal section are made of organic glass, and irregular fine grooves are etched on the bottom surface and side walls of the inner surface of the horizontal section.

[0018] The use of transparent organic glass material can better observe the test process and help the laser ranging equipment to measure the distance. Since the surface of organic glass is relatively smooth, the friction force it encounters during actual pouring is quite different. By etching irregular fine grooves, a microscopic concave-convex texture with a certain degree of roughness is generated to increase friction and approximately simulate the surface of the surrounding rock, thereby better simulating the real flow state of the self-compacting backfill material in actual application.

[0019] Preferably, the height of the inner cavity of the vertical section is 700 mm, the width is 200 mm, and the top surface length is 200 mm; the length of the inner cavity of the horizontal section is 1000 mm, the width is 200 mm, and the height is 170 mm.

[0020] Preferably, a control system is also included, which includes a display screen and control buttons to regulate and coordinate the drive motor, flow meter, flow rate sensor, stirring equipment and laser ranging equipment.

[0021] The test status parameters, test results, etc. are displayed on the display screen. The operator can output control instructions through the control buttons to control the opening and closing of the ball valve body, the opening degree, the material box mixer and other operating parameters.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The self-compacting backfill material fluidity detection device provided by the utility model is improved on the existing technology in terms of the movable switch. By adopting an electric quick-opening ball valve device, a rapid response of the valve opening and closing is achieved, ensuring that the slurry flows continuously and stably into the vertical section.

[0024] (2) The electric quick-opening ball valve device of the utility model can set the valve to different opening degrees by driving the motor to drive and control the ball valve body, and evaluate its flow performance from multiple aspects according to the outflow rate or flow rate of the self-compacting backfill material.

[0025] (3) The utility model is also provided with a material box and fine grooves, etc., to better simulate the actual flow state of the self-compacting backfill material under actual conditions, and to achieve accurate recording of the simulation data through a laser ranging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0027] Figure 1 A schematic diagram of the structure of a self-compacting backfill material fluidity detection device provided by an embodiment of the utility model;

[0028] Figure 2 A side view of a self-compacting backfill material fluidity detection device provided by an embodiment of the utility model;

[0029] Figure 3 This is a schematic structural diagram of an electric quick-opening ball valve device provided in an embodiment of the utility model.

[0030] Among them, 1-vertical section, 2-horizontal section, 3-electric quick-opening ball valve equipment, 4-material box, 5-mixing equipment, 6-rotary ball valve, 7-pressure ring. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings and specific embodiments, but those skilled in the art will understand that the embodiments described below are part of the embodiments of the utility model, rather than all of the embodiments, and are only used to illustrate the utility model, and should not be considered as limiting the scope of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the utility model. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integrated connection; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In order to more clearly explain the technical solution of the present invention, it is described in the form of specific embodiments below.

[0035] Example

[0036] like Figure 1-2 As shown, this embodiment provides a self-compacting backfill material fluidity detection device, including a container for performing fluidity test, the container is an L-shaped structure, and consists of a vertical section 1 and a horizontal section 2, wherein an opening is provided at the top of the vertical section 1 as an inlet for the self-compacting backfill material, and the rest of the vertical section 1 and the horizontal section 2 are sealed to avoid slurry leakage during the test.

[0037] In this embodiment, the height of the inner cavity of the vertical section 1 is 700 mm, the width is 200 mm, and the top surface length is 200 mm; the length of the inner cavity of the horizontal section 2 is 1000 mm, the width is 200 mm, and the height is 170 mm, which can meet the space requirements of simulation and performance testing.

[0038] Reference Figure 3 As shown, an electric quick-opening ball valve device 3 is provided at the opening at the top of the vertical section 1 as a switch for controlling the self-compacting backfill material to enter the vertical section 1. The electric quick-opening ball valve device 3 includes a driving motor and a ball valve body connected to the driving motor, and the ball valve body includes a rotating ball valve and pressure rings arranged on the upper and lower sides of the rotating ball valve.

[0039] The driving motor adopts a bidirectional rotating structure, and controls the rotation angle of the rotary ball valve 6 in the ball valve body through push-pull action. When the through hole is rotated 90°, it is fully open. There are multiple opening positions preset on the pressure ring 7, which helps the driving motor to adjust the rotation angle of the rotary ball valve 6, thereby controlling the opening degree of the valve.

[0040] Among them, the electric quick-opening ball valve device 3 is also provided with a flow meter and a flow velocity sensor to obtain data on flow and flow velocity, so as to facilitate drawing a curve of the relationship between rate or flow and valve opening. In this embodiment, the flow meter is preferably an electromagnetic flow meter, and the flow velocity sensor is preferably a Doppler flow velocity sensor.

[0041] During specific operation, the ball valve body can be rotated 90° to fully open. After the self-compacting backfill material stops flowing, the H2 / H1 index data is obtained by measuring and recording the heights on both sides to evaluate the fluidity. In addition, the rotation angle of the rotary ball valve can be controlled, such as starting from full opening (90 degrees) and gradually reducing the angle (for example, 10 degrees each time). By testing and recording the rate and flow rate of the self-compacting backfill material flowing out of the valve at different openings, a curve of the relationship between the rate or flow rate and the valve opening is drawn, and finally the flow performance is further evaluated based on the flatness of the curve.

[0042] To ensure the accuracy of the measurement results, vertical section 1 and horizontal section 2 are both equipped with laser distance measuring devices perpendicular to the container surface. While accurately measuring the values, the data is transmitted to the control system through the line for calculation and drawing. In order to cooperate with the use of laser distance measuring equipment, vertical section 1 and horizontal section 2 are made of transparent organic glass as a whole, so that the laser can penetrate more easily and reduce measurement errors.

[0043] In the actual construction process, the two sides of the groove where the self-compacting backfill material is poured are not smooth, but the surrounding rock with a certain degree of roughness; and although a sand cushion layer is often set at the bottom of the groove for leveling, the sand cushion layer also has a certain degree of roughness. The L-shaped structure container used in the prior art is mostly a smooth-surfaced organic glass plate or steel plate, which is quite different from the friction force during actual pouring. In order to more realistically simulate the force and flow state of the self-compacting backfill material, the utility model etches irregular fine grooves on the bottom and side walls of the inner surface of the horizontal section 2 to generate a microscopic concave-convex texture with a certain degree of roughness, increase friction, and approximately simulate the surface of the surrounding rock and sand cushion layer.

[0044] In addition, a material box 4 is provided at the top of the entrance of the vertical section 1. The material box 4 is used to hold the self-compacting backfill material. The bottom of the material box 4 is provided with an outlet of the material box 4, which is completely covered by the ball valve body. Among them, a stirring device 5 is provided at the inner center of the material box 4, which can be used to simulate the stirring effect of the mixer truck on the self-compacting backfill material during transportation, which is conducive to reducing the fluidity loss of the self-compacting backfill material. Since the initial setting time of the self-compacting backfill material is generally longer than that of ordinary concrete, it needs to be determined according to a time not less than the sum of the transportation time and the on-site backfill time; in addition, when pouring in sections, the backfill time is preferably controlled to be 80-100% of the initial setting time of the self-compacting backfill material poured in advance. Therefore, by simulating the stirring effect of the mixer truck, the initial setting time required for the self-compacting backfill material can also be tested to facilitate the improvement of the material formula; the flow properties of the self-compacting backfill material at different initial setting times can also be tested to determine the best time for backfilling.

[0045] In addition, it also includes a control system, which includes a display screen and control buttons, which can control the operating parameters of the above-mentioned drive motor, flow meter, flow rate sensor, stirring equipment 5 and laser ranging equipment, and the test status parameters, test results, etc. are displayed through the display screen.

[0046] Finally, it is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the principles and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A self-compacting backfill material fluidity detection device, characterized in that: The invention comprises a container, which is an L-shaped structure composed of a vertical section and a horizontal section. The top of the vertical section is an inlet for self-compacting backfilling materials, and an electric quick-opening ball valve device is arranged at the inlet.

2. The fluidity detection device according to claim 1, characterized in that: The electric quick-opening ball valve device includes a driving motor, the driving motor is connected to a ball valve body, the ball valve body includes a rotating ball valve with a through hole and a pressure ring arranged on the upper and lower sides of the rotating ball valve, and a plurality of opening positions are preset on the pressure ring.

3. The fluidity detection device according to claim 2, characterized in that: The electric quick-opening ball valve device also includes a flow meter and a flow rate sensor.

4. The fluidity detection device according to claim 3, characterized in that: The top of the inlet is connected to a material box, the bottom outlet of the material box is completely covered by the ball valve body, and a stirring device is arranged at the center of the interior of the material box.

5. The fluidity detection device according to claim 4, characterized in that: Laser distance measuring equipment is arranged on the vertical section and the horizontal section.

6. The fluidity detection device according to claim 5, characterized in that: The vertical section and the horizontal section are made of organic glass, and irregular fine grooves are etched on the bottom surface and side walls of the inner surface of the horizontal section.

7. The fluidity detection device according to claim 1, characterized in that: The height of the inner cavity of the vertical section is 700 mm, the width is 200 mm, and the top surface length is 200 mm; the length of the inner cavity of the horizontal section is 1000 mm, the width is 200 mm, and the height is 170 mm.

8. The fluidity detection device according to claim 2, characterized in that: It also includes a control system, which includes a display screen and control buttons to regulate and coordinate the drive motor, flow meter, flow rate sensor, stirring equipment and laser distance measuring equipment.

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