Device capable of fixing mold for vibration
By designing a device including a fixing mechanism and a vibration table, the problem that traditional vibration devices cannot achieve uniform vibration inside the mold is solved, and the efficiency, stability and uniform pouring of concrete are achieved, and the quality and working efficiency of concrete are improved.
Patent Information
- Application Number
- CN202421209817.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-05-29
AI Technical Summary
During the pouring of concrete specimens, traditional vibration devices cannot achieve uniform vibration inside the mold, resulting in uneven distribution of concrete, unstable amplitude, and easy to be disturbed by external interference, resulting in unstable concrete quality or local defects.
A device including a fixing mechanism and a vibration table is designed. The fixing mechanism is fixed to the vibration table by welding to ensure that the mold is subjected to uniform force when vibrating, and the hollow frame and baffle are fixed by a cylindrical shape to prevent the mold from turning over, ensuring the stability and safety of vibration.
It realizes uniform vibration inside the mold, reduces accidental errors, improves the density and quality stability of concrete, reduces manpower investment, and improves work efficiency.
Smart Images
Figure CN222590163U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of civil engineering, in particular to a device capable of fixing a mold for vibration. Background Art
[0002] In the pouring of concrete specimens, molds are usually used to make various types of concrete specimens.
[0003] Freshly mixed concrete is often in a loose state, and the particles of various materials are of different sizes, which will form voids of different sizes. The voids and bubbles account for 5-20% of the concrete volume. During the pouring process, it is very easy to form honeycombs due to loose vibration, which greatly reduces the compressive strength and density of the concrete. Therefore, in the traditional pouring process, it is usually necessary to apply vibration to the outside of the mold, such as instruments such as vibration table vibrators, to ensure that the concrete fully fills the mold and obtains the ideal density and quality.
[0004] However, there are still some limitations in the existing technology of making concrete test blocks through concrete molds and vibration. For example, some traditional mold vibration devices may not be able to vibrate the inside of the mold, which will lead to uneven distribution of concrete inside the mold. For another example, when the concrete test block is on the vibration table, the amplitude is unstable due to the lack of additional fixation, and its movement trajectory is easily affected by external interference and overturned, which makes the quality of the poured concrete unstable or has local defects. Utility Model Content
[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a device that can fix the mold for vibration, and provide a more efficient, more stable and safer mold vibration solution.
[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is a device that can fix the mold for vibration, including a fixing mechanism and a vibration table, the lower end of the fixing mechanism and the upper end plane of the vibration table are fixed by welding, and the fixing mechanism includes a mold fixing device evenly distributed at a distance from the vibration center, which is used to place the mold.
[0007] Preferably, the fixing mechanism is a hollow frame formed by welding steel bars, and the dimensions of the fixing mechanism are 600 mm in length, 400 mm in width, and 200 mm in height.
[0008] Preferably, the mold fixing device is a cylindrical fixed hollow frame for placing a movable concrete mold, and the concrete mold has a diameter of 150 mm and a height of 200 mm.
[0009] Preferably, an infrared rangefinder and a timed automatic data acquisition device are installed vertically downward above the mold fixing device.
[0010] Preferably, a weighing device is installed below the mold fixing device.
[0011] Preferably, the number of the mold fixing devices is 3 to 6.
[0012] More preferably, the number of the mold fixing devices is 4, the diameter is 155 mm, and the height is 200 mm.
[0013] Preferably, the table top of the vibration table is a steel plate, and also includes baffles around it.
[0014] Preferably, the table top of the vibration table is rectangular or square.
[0015] Preferably, the vibration table also includes a vibration device and a base frame, the vibration table plane and the base frame are welded by steel plates and steel sections to form a vibration table frame, the vibration device is composed of a motor, an eccentric wheel, a spring, and a hanger coupling, and the vibration device is installed at the geometric center position inside the vibration table frame through the hanger coupling.
[0016] Preferably, the vibration device is an adjustable vibration device in which at least one of the vibration direction, vibration frequency, vibration time and vibration amplitude can be adjusted.
[0017] Preferably, the vibration device vibrates in a stable vertical direction during the vibration process.
[0018] Preferably, the spring is a high-strength load-bearing spring.
[0019] Preferably, the number of the eccentric wheels is two, and the number of the springs is four.
[0020] The utility model relates to a device capable of fixing a mould for vibration, comprising a fixing mechanism and a vibration table. The fixing mechanism also comprises a cylindrical fixed hollow frame evenly distributed along the centre.
[0021] The beneficial effects of the utility model are:
[0022] 1. The cylindrical fixed hollow frame is evenly distributed along the vibration center to obtain uniform vibration external force of the vibration table, which can effectively solve the problem of uneven vibration during concrete pouring and reduce accidental errors;
[0023] 2. The fixing mechanism and the table top of the vibration table are fixed by welding, which can reduce the trouble of the experimenter manually fixing the concrete mold for vibration, avoid the problem of uneven force on the concrete in the concrete mold, reduce manpower input, and improve work efficiency;
[0024] 3. During the vibration process, the mold placed in the cylindrical fixed hollow frame is displaced by the vibration, which squeezes the surrounding steel bars. The steel bars are squeezed by the mold and produce a reaction force on the mold to limit the displacement of the mold, thereby playing a role in fixing the concrete mold on the vibration table;
[0025] 4. Baffles are arranged around the table top of the vibration table, and the baffles are tightly welded to the table top of the vibration table, which can effectively prevent the concrete mold from tipping over or shifting during the vibration process, thereby ensuring the safety of the staff and the stability of the vibration compaction effect of the concrete in the concrete mold. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the structure of the fixing mechanism described in Example 1 of the utility model.
[0027] Figure 2 This is a schematic diagram of the structure of the vibration table described in Example 1 of the utility model.
[0028] Figure 3 This is a complete structural diagram of the connection between the fixing mechanism and the vibration table described in Example 1 of the utility model.
[0029] Figure 4 This is a schematic diagram of the position distribution of the mold fixing device described in Example 1 of the utility model.
[0030] Figure 5 This is a schematic diagram of the installation position of the vibration device described in Example 1 of the utility model inside the vibration table frame.
[0031] In the figure: 1. fixing mechanism; 2. baffle; 3. vibration table surface; 4. spring; 5. base frame; 6. vibration table plane; 7. mold fixing device; 8. vibration device. DETAILED DESCRIPTION
[0032] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0033] Example 1
[0034] This embodiment discloses a device capable of fixing a mold for vibration, which adopts a method of fixing the mold by adding an upper steel bar composite frame to a vibration table. The device includes a stable steel bar frame and an original vibration table, which can effectively solve the problem of uneven vibration during concrete pouring. The detailed information is as follows:
[0035] A fixing mechanism 1 is arranged above the table 3 of the vibration table. The fixing mechanism is generally formed by welding steel pipe beams. The stable steel frame can effectively support the entire steel frame. Figure 1 As shown, the fixing mechanism 1 is a steel frame structure, below which is a vibration table surface 3 with a length of 600 mm and a width of 400 mm, and a cylindrical fixed hollow frame with a diameter of 155 mm and a height of 200 mm, i.e., a fixing device 7 for a concrete mold, which is evenly distributed with its center at an equal distance from the geometric center of the vibration table, and the number is set to 3 to 6, preferably 4, which can respectively place movable plastic concrete molds with a size of 150 mm*200 mm.
[0036] In addition, baffles 2 are arranged around the table 3 of the vibration table and are tightly welded to the vibration table plane 6, which can effectively prevent the mold from tipping over or shifting during the vibration process, ensuring the safety of the staff and the stability of the compaction effect. By designing the structure of the vibration table and the mold as one, the manpower input is minimized and the work efficiency is improved.
[0037] like Figure 1 As shown, the four concrete mold fixing positions 7, i.e., the cylindrical fixed hollow frames, are evenly distributed with the center of the circle being equidistant from the vibration center, which can ensure that each mold is evenly stressed during vibration. Furthermore, the lower end of the mold fixing device 7 and the contact portion with the vibration table plane 6 are also fixed by welding, which can make the fixed hollow frame more firmly fix the mold.
[0038] Reference Figure 2 It is a vibration table structure, mainly composed of components such as the vibration table base frame 5, vibrator spring 4, and vibration device 8. The vibration table plane 6, spring 4 and base frame 5 are all welded with steel plates and steel sections to form a vibration table frame. The vibration device 8 is composed of a motor and a pair of identical eccentric wheels, and is installed at the geometric center of the table (reverse side) through a pair of hanger couplings. Its function is to stabilize the vertical direction during the vibration compaction process. The vibration table plane 6 is a square with a length and width of 500mm. The spring 4 is a high-strength load-bearing spring to ensure that the mold casting process can proceed smoothly. The middle part of the vibration table base frame 5 is hollow. The composition of the vibration table spring 4 and the base frame 5 provides a good basic support for the casting of concrete specimens. The mold is used as a temporary vibration compaction component. After pouring concrete into the mold, the spatial position is fixed by its own weight. By designing a fixing device 7 that is installed on the vibration table and set in a one-to-one ratio according to the mold to fix the mold for casting, and the fixed position is evenly distributed from the vibration center, ensuring uniform vibration, reducing accidental errors in the experiment, and can be taken out for maintenance after the bubbles are discharged. Vibrating the mold by fixing the mold device 7 can reduce the trouble of the test personnel manually fixing the mold for vibration, and also make the experimental value close to the theoretical value to a certain extent.
[0039] Example 2
[0040] The specific steps of using a device that can fix a mold for vibration are as follows:
[0041] Step 1: Place a vibration table with a size of 500mm*500mm on a horizontal ground, adjust it with a level, and put four 150mm*300mm concrete molds into the steel cylindrical hollow structure of the steel bar fixing mechanism 1 welded on the upper part of the vibration table plane 6;
[0042] Step 2: Apply a thin layer of engine oil or release agent on the inner wall of the test mold cavity, load the concrete mixture into the mold at one time, and vibrate the four test pieces on a flat vibration table at the same time. The vibration should continue until the slurry appears on the surface and there are no obvious large bubbles overflowing. Do not over-vibrate to ensure that the concrete reaches a high density at the same time. Then evacuate the mold to the ground and use plastic wrap to seal it for 24 hours.
[0043] Step 3: After 24 hours of sealing, the concrete specimens were demoulded and transferred to a standard curing room with a temperature of 20±2°C and a relative humidity of 95% for curing.
[0044] Step 4: After the curing is completed, the concrete specimens can be subjected to material performance tests such as axial compression test and durability test.
[0045] Example 3
[0046] In this embodiment, a device that can fix the mold for vibration is provided, and an infrared rangefinder and a timed automatic data acquisition device are installed vertically downward above the cylindrical fixed hollow frame of its fixing mechanism 1 to monitor the changes in the concrete pouring height inside the cylindrical fixed hollow frame.
[0047] In step 2 of the above embodiment 2, the concrete mixture is loaded into the mold at one time, and the four test pieces are vibrated simultaneously. In order to effectively check and control the vibration to continue until the slurry comes out of the surface and there is no obvious large bubble overflow, and no over-vibration is allowed, so as to ensure that the concrete reaches a high density synchronously, the concrete height before, during and after the vibration can be automatically and regularly measured by an infrared rangefinder. The change in the concrete height can reflect the vibration of the bubbles in the concrete. When the concrete density reaches a high density, the vibration can be stopped in time and the mold can be evacuated, which can also play an environmental protection role in saving energy.
[0048] Example 4
[0049] In this embodiment, a device that can fix a mold for vibration is provided, and a timing weighing device is connected to the bottom of the cylindrical fixed hollow frame of its fixing mechanism 1 or the vibration table surface 3 to automatically measure the weight of the concrete, so as to monitor the weight change of the concrete poured into the mold inside the cylindrical fixed hollow frame.
[0050] In step 2 of the above embodiment 2, the concrete mixture is loaded into the mold at one time, and the four test pieces are vibrated simultaneously. In order to effectively check and control the vibration to continue until the slurry comes out of the surface and there is no obvious large bubble overflow, and no over-vibration is allowed, so as to ensure that the concrete reaches a higher density synchronously, the weight of the concrete before, during and after the vibration can be automatically and regularly measured by a weighing device. The change in the weight of the concrete can reflect the vibration of the bubbles in the concrete. When the concrete density reaches a higher density, the vibration can be stopped in time and the mold can be evacuated.
[0051] The utility model provides a device capable of fixing a mold for vibration, which can not only improve the integrity, uniformity and compactness of concrete to a certain extent, but also facilitate the concrete test block testing unit to produce and detect corresponding material properties, and proposes a concise and efficient path for the preparation of concrete test blocks, has good procedural standardization, avoids the empiricism and blindness in traditional production, and is convenient for large-scale promotion and use.
[0052] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.
Claims
1. A device for fixing a mold for vibration, comprising a fixing mechanism and a vibration table, wherein the lower end of the fixing mechanism and the plane of the upper end of the vibration table are fixed by welding, characterized in that: The fixing mechanism also includes a mold fixing device evenly distributed at a distance from the vibration center, which is used to place the mold.
2. The device according to claim 1, characterized in that The fixing mechanism is a steel structure, and the fixing mechanism is a hollow frame formed by welding steel bars.
3. The device according to claim 1, characterized in that The mold fixing device is a cylindrical fixed hollow frame that can hold four cylindrical molds, and the number of the cylindrical hollow frames is four.
4. The device according to any one of claims 1 to 3, characterized in that: The vibrating table also includes baffles around the table top.
5. The device according to claim 4, characterized in that The number of the baffles is four.
6. The device according to claim 1, characterized in that An infrared rangefinder and a timing automatic data acquisition device are installed vertically downward above the mold fixing device.
7. The device according to claim 1, characterized in that A weighing device is installed below the mold fixing device.
8. The device according to any one of claims 1 to 3, characterized in that: The vibration table also includes a vibration device and a base frame. The table top and the base frame of the vibration table are welded from steel plates and steel sections to form a vibration table frame. The vibration device is composed of a motor, an eccentric wheel, a spring, and a hanger coupling. The vibration device is installed at the geometric center position inside the vibration table frame through the hanger coupling.
9. The device according to claim 8, characterized in that The number of the eccentric wheels is two.
10. The device according to claim 8, characterized in that The number of the springs is four.