Microwave drying equipment for reducing water content of dam filling soil material in situ

Abstract

A microwave drying device for reducing the water content of dam filling soil in situ comprises a chassis, a cab and a power unit, a connecting frame is arranged at the front end of the chassis through a hydraulic supporting system, a bulldozing knife is arranged at the front end of the connecting frame, a microwave drying unit is arranged on the upper portion of the connecting frame, and a soil rotary overturning device is arranged at the rear end of the chassis. The microwave drying unit, the soil material rotary turning device and the hydraulic supporting system are electrically connected with a PLC control unit installed in a cab. The drying power and the running speed are coordinated through the PLC control unit, the actual moisture content of the field soil material is accurately controlled, the problems that the moisture content of the soil material is too large and a large number of mechanical equipment and workers are lost due to interference of weather factors are solved, and the problem that the construction progress of the soil material in rainy weather areas is slow is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of equipment or devices for processing earth-rock dam filling materials, and in particular relates to a microwave drying device for in-situ reducing the moisture content of dam filling materials. Background Art

[0002] In order to ensure the compaction effect of the soil material used in the clay dam, the water content of the soil material must be controlled within the deviation range of the optimal water content to ensure that the compaction meets the design requirements. When the water content of the soil material is too high, the soil material is not easy to compact and is prone to springs. During the actual on-site filling process, when the water content of the paved soil material is too high due to rainy weather, the conventional operation is to evaporate the excess water in the soil material through natural drying and rotation. It takes about 2 hours to reduce the water content of the soil material by 1%, and the surface soil material still needs to be rotated and stirred after drying. When the water content is too high, the on-site construction waiting time is longer, or the soil material with a high water content is excavated and re-paved. During the rainy season in some areas, the temperature is low, the ultraviolet rays are not strong, and the water in the soil evaporates slowly. It usually takes 2 to 3 days for the soil to evaporate naturally after the rain. If the soil with a high moisture content is dug out and re-laid, it will not only waste transportation resources, but also easily disturb the quality of the upper layer of qualified soil and the non-soil dam materials on both sides that are contaminated during transportation. Therefore, during the construction of clay dams, when dealing with soil with a high moisture content, all kinds of rolling, paving equipment and manpower configured for on-site soil construction are in a state of idle work, and the efficiency of soil filling is greatly reduced. Based on the above requirements, during the soil filling process, for the treatment of soil with a high moisture content that has been laid, a device that can quickly reduce the moisture content of the in-situ soil is needed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a microwave drying device which is used to accurately adjust the moisture content during on-site paving to ensure the actual construction quality and reduce the moisture content of the dam filling soil in situ.

[0004] The technical solution adopted to solve the above technical problems is: a microwave drying equipment for reducing the moisture content of dam filling soil in situ, including a chassis, a cab, and a power unit. A connecting frame is arranged at the front end of the chassis through a hydraulic support system, a bulldozer is arranged at the front end of the connecting frame, a microwave drying unit is arranged on the upper part, and a soil turning device is arranged at the rear end of the chassis. The microwave drying unit, the soil turning device, and the hydraulic support system are electrically connected to a PLC control unit installed in the cab.

[0005] The microwave drying unit of the present invention comprises: a heat dissipation hole is arranged in the middle of an inverted U-shaped installation shell, a heat dissipation fan is installed at the corresponding position of the heat dissipation hole on the installation shell, a plurality of groups of microwave guide holes are processed on the bottom and side wall of the installation shell, a plurality of groups of microwave generators are arranged on the installation shell corresponding to the microwave guide holes, and the microwave generator is electrically connected to a PLC control unit.

[0006] The microwave generators on the side wall of the mounting shell of the present invention are symmetrically arranged.

[0007] The connecting frames of the present invention are symmetrically arranged in two groups with respect to the width direction of the chassis.

[0008] The soil material turning device of the present invention is provided with a plurality of groups of moisture content sensors, and the moisture content sensors are electrically connected with the PLC control unit.

[0009] Since the present invention uses a microwave drying unit at the front end of the chassis to dry the soil, the rear rotary device mixes the soil with different water content evenly, and coordinates the drying power and the driving speed through the PLC control unit, the actual moisture content of the soil on site is accurately controlled. The problem of high moisture content of soil caused by weather factors, a large number of mechanical equipment and personnel idle work is solved, and the difficult problem of slow progress of soil construction in rainy weather areas is accelerated. At the same time, in the process of earth-rock dam construction, the process of preparing soil by adding water to soak the soil increases the allowable error range, reduces the pressure of controlling the moisture content of large amounts of soil, and the process can prepare soil with a wet moisture content. The equipment is used to accurately adjust the moisture content during on-site paving to ensure the actual construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0011] Figure 2 yes Figure 1 Top view of the .

[0012] Figure 3 yes Figure 1 Schematic diagram of the structure of the microwave drying unit.

[0013] In the figure: 1. bulldozer; 2. mounting shell; 3. cooling fan; 4. microwave generator; 5. chassis; 6. PLC control unit; 7. cab; 8. power unit; 9. soil turning device; 10. moisture content sensor; 11. hydraulic support system; 12. connecting frame; 13. microwave guide hole; 14. heat dissipation hole. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below with reference to the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.

[0015] Example 1

[0016] exist Figures 1 to 3 The present invention relates to a microwave drying device for reducing the moisture content of dam filling soil in situ, comprising a chassis 5, a cab 7, and a power unit 8. The power unit 8 provides power for the device. A connecting frame 12 is provided at the front end of the chassis 5 through a hydraulic support system 11. The connecting frame 12 is symmetrically provided with two groups about the width direction of the chassis 5. The hydraulic support system 11 is composed of multiple groups of hydraulic struts. A bulldozer 1 is provided at the front end of the connecting frame 12, and a microwave drying unit is provided at the upper part. A soil material rotation device 9 is provided at the rear end of the chassis 5. The microwave drying unit, the soil material rotation device 9, and the hydraulic support system 11 are electrically connected to a PLC control unit 6 installed in the cab 7. The PLC control unit 6 controls the extension and retraction of the hydraulic support system 11, thereby controlling the lifting and lowering of the connecting frame 12. A plurality of groups of moisture sensors 10 are arranged on the soil turning device 9, and the moisture sensors 10 are electrically connected to the PLC control unit 6. The soil turning device 9 adopts the turning device of a rotary tiller. When it is detected that the moisture content of the soil exceeds the allowable range during the clay dam filling process, the device is driven to the soil area with relatively high moisture content, and the bulldozer 1 is penetrated to the depth where the soil needs to be dried through the hydraulic support system 11. The microwave drying unit is turned on, and the moisture in the soil begins to evaporate from shallow to deep under the microwave radiation, and the moisture content decreases rapidly. The vehicle moves forward, and the soil in the area is evenly stirred by the rear soil turning device 9. The soil moisture sensor 10 feeds back the moisture content result of the evenly stirred soil to the PLC control unit 6. The PLC control unit 6 compares it with the set threshold value and adjusts the vehicle driving speed and drying power.

[0017] Furthermore, the microwave drying unit of the present embodiment is composed of a mounting shell 2, a heat dissipation fan 3, and a microwave generator 4. The mounting shell 2 is an inverted U-shaped structure. The bulldozer 1 is located at the front end of the side wall of the inverted U-shaped structure. During the driving process of the vehicle, the bulldozer 1 pushes out two channels to allow the mounting shell 2 to pass through. A heat dissipation hole 14 is arranged in the middle of the mounting shell 2. A heat dissipation fan 3 is installed at the corresponding position of the heat dissipation hole 14 on the mounting shell 2. The heat dissipation fan 3 assists in the evaporation of water. Several groups of microwave guide holes 13 are processed on the bottom and side wall of the mounting shell 2. Several groups of microwave generators 4 are arranged on the mounting shell 2 corresponding to the microwave guide holes 13. The microwave generator 4 is electrically connected to the PLC control unit 6. The microwave generators 4 on the side wall of the mounting shell 2 are symmetrically arranged. Microwaves are generated by the microwave generator 4. Water molecules in the soil material will vibrate at high speed under the action of microwaves. The friction heat generated by this vibration causes the water molecules to heat up and evaporate rapidly, thereby achieving the purpose of drying.

[0018] The working principle of the present invention is as follows:

[0019] When the soil material of the clay dam is filled with too much water, the equipment is driven to the soil material area. The microwave drying unit is set in front of the chassis 5, and the height is adjustable. When the height is controlled to be about 1 cm away from the soil material, the microwave generator 4 is turned on, and the microwaves generated accelerate the evaporation of the soil material water. The moisture content of the clay dam soil material needs to be controlled within the optimal moisture content deviation range to ensure that the soil material can be compacted when rolled. When the soil material is dried with microwaves, the moisture of the surface soil material evaporates the fastest and decreases downward, and the moisture content of the soil material gradually increases from the surface layer to the deep layer. According to the moisture content of the soil material fed back by the moisture content sensor 10, the power of the microwave generator 4 is adjusted. After the soil material is dried for about 5 seconds, the whole equipment starts to move forward. The soil material rotation device 7 is set in the rear wheel area. The soil material rotation device 7 rotates the soil material with uneven moisture content in the upper and lower layers at high speed to achieve the effect of uniform moisture content of the soil material. After the soil material is rotated, the moisture content sensor 10 detects the moisture content of the soil material. By coordinating the drying power and the driving speed, the moisture content test result is compared with the actual required moisture content. The driving speed of the equipment is adjusted according to the difference between the two values. When the difference is too large, it indicates that the moisture content of the soil is larger than the actual required moisture content, and the equipment reduces the driving speed or increases the drying power gear; when the difference approaches 0, it indicates that the moisture content of the soil is close to the actual required moisture content, and the driving speed of the equipment remains unchanged; when the difference is a negative value, it indicates that the moisture content of the soil is smaller than the actual required moisture content, and the equipment increases the driving speed or reduces the drying power gear.

Claims

1. A microwave drying device for reducing the moisture content of dam filling soil in situ, comprising a chassis (5), a cab (7), and a power unit (8), characterized in that: A connecting frame (12) is arranged at the front end of the chassis (5) through a hydraulic support system (11); a bulldozer (1) is arranged at the front end of the connecting frame (12); a microwave drying unit is arranged at the upper part; a soil material turning device (9) is arranged at the rear end of the chassis (5); the microwave drying unit, the soil material turning device (9) and the hydraulic support system (11) are electrically connected to a PLC control unit (6) installed in a cab (7).

2. The microwave drying equipment for reducing the moisture content of dam filling materials in situ according to claim 1 is characterized in that The microwave drying unit comprises: a heat dissipation hole (14) is arranged in the middle of an inverted U-shaped installation shell (2); a heat dissipation fan (3) is installed at a position corresponding to the heat dissipation hole (14) on the installation shell (2); a plurality of groups of microwave guide holes (13) are processed on the bottom and side walls of the installation shell (2); a plurality of groups of microwave generators (4) are arranged on the installation shell (2) corresponding to the microwave guide holes (13); and the microwave generators (4) are electrically connected to a PLC control unit (6).

3. The microwave drying equipment for reducing the moisture content of dam filling materials in situ according to claim 2 is characterized in that: The microwave generators (4) on the side walls of the installation shell (2) are symmetrically arranged.

4. The microwave drying equipment for reducing the moisture content of dam filling materials in situ according to claim 1 is characterized in that: The connecting frames (12) are arranged in two groups symmetrically with respect to the width direction of the chassis (5).

5. The microwave drying equipment for reducing the moisture content of dam filling materials in situ according to claim 1 is characterized in that: The soil material turning device (9) is provided with a plurality of groups of moisture content sensors (10), and the moisture content sensors (10) are electrically connected to the PLC control unit (6).

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