Joint cutter for concrete channel side slope

Abstract

The invention provides a joint cutter for a concrete channel slope, the joint cutter comprises a support, an adjustable movable frame, joint cutting equipment, a moving device, a water tank and a control cabinet, a control module is arranged in the control cabinet, and the joint cutting equipment is used for cutting the concrete channel slope by inputting a current air temperature value and channel slope pouring completion time; the temperature duration value of the side slope concrete middle layer thickness after the channel side slope is completed is called, the suggested temperature is calculated, the control module obtains the suggested temperature and controls adjustment of the water temperature of the water tank, and the water outlet temperature of the water tank is controlled by adjusting the temperature of the water tank, so that concrete temperature cracks caused by temperature difference of the side slope at the cutting position due to too low water temperature are prevented; the construction quality is ensured.

Description

[0001] Technical Field: This invention relates to the field of equipment for concrete construction, and more specifically to a cutting machine for concrete channel slopes.

[0002] Background Technology: Canals are the most common form of water diversion and conveyance structure in my country. As early as ancient times, my country began to build canals by hand to meet the needs of water allocation. Due to serious water leakage, earthen canals have low water conveyance efficiency. In order to improve the water conveyance capacity of canals, concrete lining is set during the construction or renovation of canals to form concrete canal slopes, which is an important means to improve the flow capacity of canals.

[0003] For concrete channel slopes, corresponding cutting joints are generally required to meet the deformation requirements of the channel. Traditional manual cutting methods have large operational errors and low construction efficiency. Using mobile mechanized cutting equipment can significantly improve the cutting efficiency of concrete channel slopes. However, after the concrete channel slope is poured, the internal temperature is higher than the surface temperature due to the cement hydration reaction. When cutting, the original concrete structure is damaged. In addition, water needs to be circulated to ensure the normal operation of the cutting machine and reduce friction. If the water temperature is too low, the temperature at the concrete cutting point may be too low, resulting in a temperature difference. Since the lining concrete is generally thin, the existence of a temperature difference will increase the risk of temperature crack development.

[0004] Summary of the Invention: This invention addresses the problems of existing technologies by providing a cutting machine for concrete channel slopes, used to cut joints in concrete channel slopes, thereby improving construction efficiency and reducing the risk of temperature cracking.

[0005] This invention provides a joint cutting machine for concrete channel slopes, characterized in that: the joint cutting machine includes a support frame, an adjustable movable frame, a joint cutting device, a moving device, a water tank, and a control cabinet; the joint cutting device includes a first drive motor, a belt, a cutting disc protective cover, a cutting disc, and an adjuster; the first drive motor is connected to the cutting disc via the belt; the joint cutting device is placed on the support frame via the adjustable movable frame; the moving device includes a second drive motor, a reducer, a connecting rod, traveling rollers, and moving rollers; the second drive motor is connected to the connecting rod via the reducer; the connecting rod is connected to the traveling rollers; the water tank is equipped with a control valve connected to a water supply pipe; the water supply pipe has branch pipes with several left and right sprinkler heads; and the water tank is equipped with a temperature control device. The system includes sensors and a heating device. A control module is installed within the control cabinet. This control module comprises an input module, a data storage module, and a decision module. The input module inputs the current air temperature W and the completion time T0 of the channel slope pouring. The data storage module stores the temperature duration F(W) of the intermediate layer thickness of the concrete on the channel slope since the completion of the slope pouring. The decision module, based on W and T0 input from the input module and F(W) from the data storage module, obtains a suggested temperature Wq. The control module acquires the suggested temperature Wq. When the water temperature WT in the water tank is less than Wq, the control module controls the heating device to operate. When the water temperature WT is greater than or equal to Wq, the control module controls the heating device to not operate.

[0006] As a preferred embodiment, the method for calculating the temperature duration value F(W) of the middle layer thickness of the slope concrete after the channel slope is poured is as follows: without considering the length and width of the slope concrete, only the thickness of the slope concrete is considered. A one-dimensional temperature field model is established, and the temperature of the middle layer of the slope concrete is solved using the finite element method or the one-dimensional difference method, thereby obtaining the temperature duration value F(W) of the middle layer thickness. The middle layer is half of the thickness direction of the slope concrete.

[0007] Preferably, the method for obtaining the suggested temperature Wq is as follows: based on the channel slope pouring completion time T0 input by the input module, obtain the current time T1, calculate the pouring completion time T3, based on the pouring completion time T3, query the temperature duration value F(W) of the middle layer thickness, obtain the temperature value W3 corresponding to the current middle layer thickness, compare W3 with the air temperature W at the current time, if W is less than or equal to W3 minus the set value dW, then the suggested temperature Wq is equal to W3 minus the set value dW, if W is greater than W3 minus the set value dW, then the suggested temperature Wq is equal to W.

[0008] Preferably, the branch pipe is located above the cutting blade and is used to supply water to the cutting part of the cutting blade through a water spray nozzle during operation.

[0009] Preferably, the cutting device is configured as multiple sets, each set of cutting devices is placed on a support via an adjustable movable frame, and each set of cutting devices is provided with a corresponding branch pipe so that when the cutting blade of each set of cutting devices is working, the water spray head on the branch pipe supplies water to the cutting part of the cutting blade.

[0010] The working principle of this invention is as follows:

[0011] For channel cutting machines, it is necessary to adapt to the form of the channel. By setting the appropriate drive, automated operation can be achieved. Adjustable brackets can be used to adjust the cutting device, thereby achieving position adjustment. Automated settings enable the cutting machine to work efficiently. At the same time, in order to wet the cutting part as necessary and reduce resistance, a water tank and control cabinet are set up to realize water flow control during the cutting operation and improve the cutting efficiency.

[0012] For the concrete lining structure of the channel, the internal temperature of the concrete rises after pouring due to the cement hydration reaction. Due to the poor thermal conductivity of concrete, the temperature difference between the inside and outside of the concrete increases. Once it exceeds the tensile strength of the concrete, it will cause the concrete structure to be damaged and generate temperature cracks. For cutting operations, cutting will cause damage to the concrete structure. If the internal temperature of the concrete is high and the water temperature in the water tank is low, it is very easy to create a large internal and external temperature difference, forming temperature cracks at the cutting point. Once these temperature cracks are combined with other factors, such as settlement and deformation, they can easily cause through cracks, which may even affect the safety and use of the structure.

[0013] After the concrete is poured, its internal temperature rises and then falls. By knowing the core temperature of the concrete, the temperature difference can be reduced by reasonably controlling the water temperature in the water tank, thus avoiding large internal and external temperature differences in the concrete and effectively preventing the formation of temperature cracks. At the same time, it can also meet the working requirements of the cutting machine. By using the control module, automated and intelligent construction can be achieved, improving the overall working quality and efficiency of the cutting machine.

[0014] The advantages of this invention are:

[0015] (1) Electric drive is used to move the cutting machine and improve work efficiency;

[0016] (2) Water circulation in the water tank can reduce dust, and at the same time, water can be used at the cutting blade to reduce frictional resistance, improve cutting efficiency, and reduce the wear of the cutting blade.

[0017] (3) The water temperature in the water tank is adjustable, and the heating device can be adjusted for different water temperatures.

[0018] (4) Set up a control module. The control module can realize the reasonable calculation of the recommended temperature, ensure that the water outlet temperature of the water tank is compatible with the temperature of the concrete slope lining, and reduce the generation and development of concrete temperature cracks.

[0019] (5) Utilize automated control to reduce human error, improve the working efficiency of the cutting machine, and reduce the occurrence of cracks during the cutting process. Attached image description:

[0020] Figure 1 This is a plan view of the structure of the present invention;

[0021] Figure 2 This is an elevation view (a) of the structure of the present invention;

[0022] Figure 3 This is an elevation view (b) of the structure of the present invention;

[0023] Figure 4 This is a schematic diagram of the working state of the structure of the present invention (m is the channel slope);

[0024] Figure 5 A schematic diagram of the water supply pipeline and branch pipe layout;

[0025] Figure 6 This is a schematic diagram of the control module's control flow.

[0026] Figure 7 This is a schematic diagram illustrating the suggested temperature calculation process;

[0027] Figure 8 This is a schematic diagram of a one-dimensional difference in the temperature field.

[0028] 1-Bracket, 2-Adjustable movable frame, 3-Water tank, 4-Control cabinet, 5-First drive motor, 6-Belt, 71-Cutting disc protective cover, 72-Cutting disc, 8-Regulator, 9-Second drive motor, 10-Reducer, 11-Connecting rod, 12-Walking roller, 13-Moving roller, 14-Control module, 15-Water supply pipe, 16-Branch pipe, 17-Sprinkler head.

[0029] Detailed Implementation: The following provides a detailed explanation of the scope of this invention.

[0030] This invention provides a cutting machine for concrete channel slopes, characterized in that: the cutting machine includes a support frame 1, an adjustable movable frame 2, a cutting device, a moving device, a water tank 3, and a control cabinet 4; the cutting device includes a first drive motor 5, a belt 6, a cutting disc protective cover 71, a cutting disc 72, and an adjuster 8; the first drive motor 5 is connected to the cutting disc 72 via the belt 6; the cutting device is placed on the support frame 1 via the adjustable movable frame 2; the moving device includes a second drive motor 9, a reducer 10, a connecting rod 11, a traveling roller 12, and a moving roller 13; the second drive motor 9 is connected to the connecting rod 11 via the reducer 10; the connecting rod 11 is connected to the traveling roller 12; the water tank 3 is equipped with a control valve connected to a water supply pipe 15; the water supply pipe 15 is equipped with a branch pipe 16, and the branch pipe 16 is equipped with several left and right spray nozzles. The water nozzle 17 is provided. A temperature sensor and a heating device are installed in the water tank 3. A control module 14 is installed in the control cabinet 4. The control module 14 is provided with an input module, a data storage module, and a decision module. The input module is used to input the current air temperature value W and the completion time T0 of the channel slope pouring. The data storage module is used to store the temperature duration value F(W) of the middle layer thickness of the slope concrete after the channel slope pouring is completed. The decision module is used to obtain a suggested temperature Wq based on W and T0 input by the input module and F(W) from the data storage module. The control module 14 obtains the suggested temperature Wq. When the water temperature WT of the water tank 3 is less than Wq, the control module 14 controls the heating device to work. When the water temperature WT of the water tank 3 is greater than or equal to Wq, the control module 14 controls the heating device to not work.

[0031] The first drive motor 5 can drive the cutting blade 72 to work. The cutting blade protective cover 71 is used to protect against dust generated during the cutting operation. The regulator 8 can be a manual mechanical regulator used to adjust the cutting depth of the cutting blade 72. The position of the cutting device can be effectively adjusted by the adjustable movable frame 2. The water tank 3 is supplied by an external water source. The water tank 3 is connected to a control valve, which can be a solenoid valve. The control valve controls the water volume of the water supply pipe 15. When there are no special requirements, it is sufficient to control the opening or closing of the control valve. Water is supplied to the vicinity of the cutting blade 72 through the water supply pipe 15 to achieve the effects of dust reduction, lubrication, and drag reduction.

[0032] Preferably, the method for calculating the temperature duration value F(W) of the middle layer thickness of the slope concrete after the channel slope is poured is as follows: without considering the length and width of the slope concrete, only the thickness of the slope concrete is considered. A one-dimensional temperature field model is established, and the temperature of the middle layer of the slope concrete is solved using the finite element method or the one-dimensional difference method, thereby obtaining the temperature duration value F(W) of the middle layer thickness. The middle layer is half of the thickness direction of the slope concrete (i.e., the central layer in the thickness direction).

[0033] The one-dimensional temperature field model can refer to the relevant provisions of the "Standard for Construction of Mass Concrete" (GB50496-2018) or related papers and books, all of which have detailed descriptions of the one-dimensional temperature field solution. Through specific solution methods, the one-dimensional temperature field solution results can be obtained. These results are calculated and stored every hour after the concrete slope is poured. That is, the time interval for the temperature duration value F(W) of the middle layer thickness is in the hourly range. When querying later, it can be approximately rounded down. For example, at any time between 2 o'clock and 3 o'clock, the data of the whole hour of 2 o'clock is taken. Since the temperature of the middle layer does not change abruptly, although there will be some discrepancies in the duration curve, it can basically meet the requirements of engineering use.

[0034] When solving the one-dimensional temperature field, the initial temperature of the concrete pouring is taken as the temperature at which it enters the formwork. The various parameters of the poured concrete are based on laboratory test data. If no test data is available, values ​​can also be determined based on experience. The external temperature changes are based on the forecast temperature data from the weather forecast. The one-dimensional difference format is shown below:

[0035] T i,τ+Δτ =(1-2r)T i,τ +r(T i-1,τ +T i+1,τ )+Δθ

[0036] In the formula, r = aΔτ / h 2 When r is less than 0.5, the difference scheme is stable. Δθ is the heat generated by concrete per unit time, which can be calculated using the heat generation formula.

[0037] Preferably, the method for obtaining the suggested temperature Wq is as follows: based on the channel slope pouring completion time T0 input by the input module, obtain the current time T1, calculate the pouring completion time T3, based on the pouring completion time T3, query the temperature duration value F(W) of the middle layer thickness, obtain the temperature value W3 corresponding to the current middle layer thickness, compare W3 with the air temperature W at the current time, if W is less than or equal to W3 minus the set value dW, then the suggested temperature Wq is equal to W3 minus the set value dW, if W is greater than W3 minus the set value dW, then the suggested temperature Wq is equal to W.

[0038] The pouring completion time can be manually input and must be accurate to the minute. The current time is automatically obtained by the system. Using the current time and the pouring completion time, the pouring completion duration (T1-T0) can be calculated. Using this duration, the temperature duration value F(W) of the middle layer thickness can be queried to obtain the temperature value W3 corresponding to the current middle layer thickness. By comparing W3 with the air temperature W at the current moment, the suggested temperature can be obtained. Considering the concrete pouring capacity, it is generally assumed that the concrete slope pouring completion time is the same at every set distance. For example, the pouring completion time is reset every 100m or 50m. The calculation of the temperature duration value F(W) can be performed by computer, and the results can be entered and stored. Generally, for a set distance, the pouring temperature is selected as the same set of calculation results. The decision-making module can be a microcontroller with logic storage capability. The input module can be a small control cabinet with data input function. Input includes manual input or computer input. When the on-site calculation conditions are not available, the computer can also be used for calculation and analysis. The suggested temperature calculated by the computer is connected to the control module 14 via a wire. After the control module 14 obtains the suggested temperature, it directly controls the working status of the heating device.

[0039] Preferably, the branch pipe 16 is located above the cutting blade and is used to supply water to the cutting part of the cutting blade through the water spray nozzle 17 during operation.

[0040] Preferably, the cutting device is configured as multiple sets, each set of cutting devices is placed on the support 1 via an adjustable movable frame 2, and each set of cutting devices is provided with a corresponding branch pipe 16 so that when the cutting blade of each set of cutting devices is working, the water spray nozzle 17 on the branch pipe 16 supplies water to the cutting part of the cutting blade.

[0041] As shown in the attached diagram, the cutting device includes two sets, which can be used to cut two slope joints simultaneously. The number of cutting devices can be increased or decreased according to the actual construction design requirements and the number of joints. Each cutting device is independent and can be spliced ​​on site according to the number of joints. The bracket 1 is connected by U-bolts.

[0042] The overall support frame 1 is welded from square steel. When cutting slope joints, its upper end is suspended and fixed to the top of the lining via movable rollers 13, and the cutting surface moves using traveling rollers 12. The second drive motor 9 and the reducer 10 are connected as a single component, providing power for the cutting machine's movement and allowing adjustment and determination of the cutting speed. The traveling rollers 12 are fixed to the support frame 1 via bearing seats. The general direction of travel is clockwise for the cutting blade 72. The connection between the cutting blade 72 and the first drive motor is a reverse nut, meaning the cutting blade 72 can only rotate clockwise.

[0043] The above embodiments are merely preferred embodiments of the present invention. The scope of protection of the present invention should not be considered as limited to the specific forms described in the embodiments. The scope of protection of the present invention also includes equivalent technical means that can be conceived by those skilled in the art based on the concept of the present invention.

Claims

1. A cutting machine for concrete channel slopes, characterized in that: The slitting machine includes a support frame, an adjustable movable frame, slitting equipment, a moving device, a water tank, and a control cabinet. The slitting equipment includes a first drive motor, a belt, a cutting disc protective cover, a cutting disc, and an adjuster. The first drive motor is connected to the cutting disc via the belt. The slitting equipment is placed on the support frame via the adjustable movable frame. The moving device includes a second drive motor, a reducer, a connecting rod, traveling rollers, and moving rollers. The second drive motor is connected to the connecting rod via the reducer, and the connecting rod is connected to the traveling rollers. The water tank is equipped with a control valve connected to a water supply pipe. The water supply pipe has branch pipes with several left and right sprinkler heads. The water tank contains a temperature sensor and a heating device. The control cabinet contains a control module, which includes an input module, a data storage module, and a decision module. The input module is used to input the current temperature value W and the completion time T0 of the channel slope pouring. The data storage module is used to store the temperature duration F(W) of the middle layer thickness of the concrete on the channel slope since the completion of the pouring. The decision module is used to obtain a suggested temperature Wq based on the W and T0 input by the input module and the F(W) from the data storage module. The control module obtains the suggested temperature Wq and controls the heating device to work when the water temperature WT in the water tank is less than Wq. When the water temperature WT in the water tank is greater than or equal to Wq, the control module controls the heating device to not work.

2. A cutting machine for concrete channel slopes as described in claim 1, characterized in that: The method for calculating the temperature duration value F(W) of the middle layer thickness of the slope concrete after the channel slope is poured is as follows: without considering the length and width of the slope concrete, only the thickness of the slope concrete is considered. A one-dimensional temperature field model is established, and the temperature of the middle layer of the slope concrete is solved using the finite element method or the one-dimensional difference method, thereby obtaining the temperature duration value F(W) of the middle layer thickness. The middle layer is half of the thickness direction of the slope concrete.

3. A cutting machine for concrete channel slopes as described in claim 2, characterized in that: The method for obtaining the suggested temperature Wq is as follows: Based on the channel slope pouring completion time T0 input by the input module, obtain the current time T1, calculate the pouring completion time T3, and based on the pouring completion time T3, query the temperature duration value F(W) of the middle layer thickness to obtain the temperature value W3 corresponding to the current middle layer thickness. Compare W3 with the air temperature W at the current time. If W is less than or equal to W3 minus the set value dW, then the suggested temperature Wq is equal to W3 minus the set value dW. If W is greater than W3 minus the set value dW, then the suggested temperature Wq is equal to W.

4. A cutting machine for concrete channel slopes as described in claim 1, characterized in that: The branch pipe is located above the cutting blade and is used to supply water to the cutting part of the cutting blade through a water spray nozzle during operation.

5. A cutting machine for concrete channel slopes as described in claim 1, characterized in that: The cutting device is configured in multiple sets, each set of which is placed on a support via an adjustable movable frame. Each set of the cutting device is equipped with a corresponding branch pipe so that when the cutting blade of each set of the cutting device is working, the water spray nozzle on the branch pipe supplies water to the cutting part of the cutting blade.

Images