Concrete preparation mixing device for engineering construction

Abstract

The invention belongs to the technical field of concrete preparation, and particularly relates to an engineering construction concrete preparation mixing device which comprises a stirring tank, a stirring motor and a stirrer, a feeding pipe is arranged at the top of the stirring tank, a discharging pipe is arranged at the bottom of the stirring tank, the stirring motor is fixedly installed at the top of the stirring tank, and the stirrer is located in the stirring tank. The stirrer is arranged in the stirring tank and fixedly connected with the stirring motor, and the temperature detection mechanisms are arranged on the inner wall of the stirring tank. According to the concrete stirring device, the temperature of concrete can be automatically detected, the power of the stirring motor is controlled through the detected temperature, the situation that the working performance is reduced by stirring at the same speed at low temperature or high temperature is avoided, meanwhile, the stirring temperature can be controlled according to the detected temperature, and the concrete stirring effect is improved; the water vapor generated in the stirring process can be recycled, the to-be-stirred aggregate can be pre-wetted, and the phenomenon of energy waste is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete preparation, and in particular relates to a concrete preparation mixing device for engineering construction. Background Art

[0002] Concrete is a material made of a mixture of water, cement and aggregates (such as sand, gravel, etc.). Concrete has been widely used in construction projects, bridges, tunnels, water conservancy projects and other fields due to its advantages such as fire resistance, good durability, convenient construction and moderate price. A mixing device is required in the preparation process of concrete. For example, Publication No.: CN118358052A discloses a recycled concrete preparation device.

[0003] The existing mixing device cannot control the temperature inside the mixing device when mixing concrete, resulting in uncontrollable mixing temperature of the concrete. Since the temperature range for mixing concrete is usually most suitable between 10°C and 30°C, too high or too low temperature will affect the hydration reaction rate of cement, the working properties of concrete (such as slump, fluidity, etc.) and the final strength development. For example, when mixing in a high temperature environment, the hydration rate of cement is accelerated, which may lead to a shortened setting time of concrete and a rapid loss of working properties. In a low temperature environment, the fluidity of concrete deteriorates, the hydration reaction is slow, and the strength development is also delayed. In addition, the water vapor generated during the mixing process of concrete cannot be recycled. If it is directly discharged into the air, it will cause certain energy loss and environmental pollution.

[0004] Therefore, a concrete preparation and mixing device for engineering construction is proposed. Summary of the invention

[0005] The object of the present invention is to provide a concrete preparation and mixing device for engineering construction in view of the above problems.

[0006] To achieve the above object, the present invention adopts the following technical scheme: a concrete preparation and mixing device for engineering construction, comprising a mixing tank, a mixing motor and a stirrer, wherein a feed pipe is arranged on the top of the mixing tank, and a discharge pipe is arranged on the bottom of the mixing tank, the mixing motor is fixedly installed on the top of the mixing tank, the stirrer is located inside the mixing tank, and the stirrer is fixedly connected to the mixing motor, and further comprising: A temperature detection mechanism is arranged on the inner wall of the stirring tank, wherein the number of the temperature detection mechanisms is three and they are arranged at the top, the middle and the bottom of the side wall of the stirring tank respectively; A protective cover is fixedly arranged outside the stirring tank, a plurality of uniformly distributed semiconductor refrigeration rods are fixedly arranged on the outer wall of the protective cover, one end of the semiconductor refrigeration rod extends to the outside of the protective cover, and the other end of the semiconductor refrigeration rod extends to the outside of the protective cover, and an annular heat conduction plate is arranged between the protective cover and the stirring tank; The current switching mechanism is arranged on the top of the stirring tank, and the current switching mechanism and the semiconductor refrigeration rod are both electrically connected to an external power source; A pre-wetting tank is arranged at one side of the stirring tank, and aggregate is stored inside the pre-wetting tank. A feed cover is arranged at the top of the pre-wetting tank, and a discharge cover is arranged at one side of the pre-wetting tank. A pipeline mechanism is arranged between the pre-wetting tank and the stirring tank, and an exhaust pipe is arranged on the side wall of the pre-wetting tank. A PLC controller and a signal hub are fixedly arranged on the top of the stirring tank, and the stirring motor, the temperature detection mechanism, the semiconductor refrigeration rod, the current switching mechanism, the pipeline mechanism and the signal hub are all electrically connected to the PLC controller.

[0007] In the above-mentioned concrete preparation and mixing device for engineering construction, the temperature detection mechanism includes an insulating tube fixedly arranged on the side wall of the mixing tank and the side wall of the protective sleeve, an infrared optical fiber temperature sensor is fixedly installed inside the insulating tube, and a transparent heat conductive plate is fixedly arranged at the opening of the insulating tube.

[0008] In the above-mentioned concrete preparation and mixing device for engineering construction, scraper plates are fixedly provided at positions corresponding to the positions of the temperature detection mechanism on both sides of the blades of the agitator, and the scraper plates can be arranged in contact with the transparent heat conductive plate.

[0009] In the above-mentioned concrete preparation and mixing device for engineering construction, the current switching mechanism includes a shell fixedly arranged on the top of the mixing tank, a current switching motor is fixedly arranged on the top of the shell, the output shaft of the current switching motor extends to the interior of the shell and a double-headed cylinder is fixedly arranged laterally, both movable ends of the double-headed cylinder are fixedly arranged with movable electrode sheets, and both sides of the shell are fixedly arranged with fixed electrode sheets corresponding to the positions of the movable electrode sheets.

[0010] In the above-mentioned concrete preparation and mixing device for engineering construction, the pipeline mechanism includes a steam pipe fixedly arranged between the mixing tank and the pre-wetting tank, and an exhaust fan is fixedly installed on the pipe wall of the steam pipe, and part of the pipe wall of the steam pipe passes through the interior of the protective cover.

[0011] In the above-mentioned concrete preparation and mixing device for engineering construction, one end of the exhaust pipe located outside the pre-wetting tank is inclined upward, and a condenser is fixedly installed inside the exhaust pipe.

[0012] In the above-mentioned concrete preparation and mixing device for engineering construction, a uniformly distributed pipe is fixedly provided inside the pre-wetting tank, one side of the uniformly distributed pipe is fixedly connected to one end of the steam pipe, the uniformly distributed pipe includes an annular pipe and a plurality of straight pipes, one end of the plurality of straight pipes are fixedly connected to the pipe wall of the annular pipe, and the pipe wall of the straight pipe is provided with a plurality of evenly distributed air outlet holes.

[0013] In the above-mentioned concrete preparation and mixing device for engineering construction, the outer shell of the mixing tank and the outer shell of the pre-wetting tank are both made of heat-insulating shells, and the bottom of the mixing tank and the bottom of the pre-wetting tank are both provided with supporting legs.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the temperature detection mechanism, the temperature detection mechanism can detect the temperature of the concrete inside the mixing tank, and the temperature detection mechanism is set at the top, middle and bottom of the mixing tank, and cooperates with the stirring action of the agitator on the concrete, so that the temperature of the concrete can be fully detected. The temperature detection mechanism sends the detected data signal to the signal hub for processing, and the signal hub feeds back to the PLC controller after processing. The PLC controller controls the current to the mixing motor according to the temperature of the concrete, so that the power of the mixing motor can be adjusted. If the temperature of the concrete surface is lower than 10°C, speeding up the mixing efficiency can make the components mixed more evenly, which is helpful to improve the early strength of the concrete. If the temperature of the concrete surface is higher than 30°C, the PLC controller controls to reduce the current to the mixing motor, so that the mixing motor can drive the agitator to rotate at low power, reduce the mixing efficiency to reduce water loss, and ensure the working performance of the concrete.

[0015] 2. Through the semiconductor refrigeration rod, after the temperature of the concrete is detected, the PLC controller controls the operation of the semiconductor refrigeration rod according to the received data signal, so that the semiconductor refrigeration rod heats or cools the inside of the mixing tank, thereby controlling the temperature of the concrete between 10℃-30℃, improving the mixing effect of the concrete and ensuring the working performance of the concrete.

[0016] 3. Through the pre-wetting tank and pipeline mechanism, the pipeline mechanism can discharge the water vapor generated inside the mixing tank into the interior of the pre-wetting tank, and the water vapor can be used to pre-wet the aggregate, so that energy can be recycled. At the same time, the pipeline mechanism passes through the interior of the heating jacket, so that the water vapor can also be cooled and cooled to ensure that the temperature of the water vapor is between 10℃-30℃, thereby improving the pre-wetting effect on the aggregate inside the pre-wetting tank, thereby reducing the amount of water required for pre-wetting the aggregate inside the pre-wetting tank before the later mixing treatment, avoiding energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a three-dimensional diagram of a concrete preparation and mixing device for engineering construction provided by the present invention; Figure 2 It is a schematic diagram of a planar cross-section structure of a concrete preparation and mixing device for engineering construction provided by the present invention; Figure 3 It is a schematic diagram of the structure of a temperature detection mechanism of a concrete preparation and mixing device for engineering construction provided by the present invention; Figure 4 It is a schematic diagram of the structure of a current switching mechanism of a concrete preparation and mixing device for engineering construction provided by the present invention; Figure 5 It is a schematic structural diagram of a cross-section of an exhaust pipe of a concrete preparation and mixing device for engineering construction provided by the present invention; Figure 6 It is a schematic diagram of the uniformly distributed pipe structure of a concrete preparation and mixing device for engineering construction provided by the present invention; Figure 7 It is a bottom view of a uniformly distributed pipe of a concrete preparation and mixing device for engineering construction provided by the present invention.

[0018] In the figure: 1 stirring tank, 2 stirring motor, 3 stirrer, 4 feeding pipe, 5 discharging pipe, 6 temperature detection mechanism, 61 heat insulation cylinder, 62 infrared optical fiber temperature sensor, 63 transparent heat conductive plate, 7 protective cover, 8 semiconductor refrigeration rod, 9 annular heat conductive plate, 10 current switching mechanism, 101 shell, 102 current switching motor, 103 double-headed cylinder, 104 movable electrode sheet, 105 fixed electrode sheet, 11 pre-wetting tank, 12 feeding cover, 13 discharging cover, 14 pipeline mechanism, 141 steam pipe, 142 exhaust fan, 15 exhaust pipe, 151 condenser, 16 PLC controller, 17 signal hub, 18 scraper plate, 19 uniform distribution pipe, 191 annular pipe, 192 straight pipe, 193 air outlet. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] like Figure 1-Figure 7 As shown, a concrete preparation and mixing device for engineering construction includes a mixing tank 1, a mixing motor 2 and a stirrer 3, a feeding pipe 4 is provided on the top of the mixing tank 1, and a discharge pipe 5 is provided on the bottom of the mixing tank 1, the mixing motor 2 is fixedly installed on the top of the mixing tank 1, the stirrer 3 is located inside the mixing tank 1, and the stirrer 3 is fixedly connected to the mixing motor 2, and also includes: The temperature detection mechanism 6 is arranged on the inner wall of the mixing tank 1. There are three temperature detection mechanisms 6, which are respectively arranged on the top, middle and bottom of the side wall of the mixing tank 1. The temperature detection mechanism 6 includes a heat-insulating tube 61 fixedly arranged on the side wall of the mixing tank 1 and the side wall of the protective cover 7. An infrared optical fiber temperature sensor 62 is fixedly installed inside the heat-insulating tube 61, and a transparent heat-conducting plate 63 is fixedly arranged at the opening of the heat-insulating tube 61. The transparent heat-conducting plate 63 can ensure that the temperature of the concrete surface is transmitted to the infrared optical fiber temperature sensor 62, so that the infrared optical fiber temperature sensor 62 can be detected by the infrared optical fiber temperature sensor 62. The temperature sensor 62 can receive the infrared radiation emitted from the surface of the concrete. Scraper plates 18 are fixedly provided at the positions corresponding to the positions of the temperature detection mechanism 6 on both sides of the blades of the agitator 3, and the scraper plates 18 can be arranged in contact with the transparent heat-conducting plate 63. Since the concrete whose temperature has been detected may block the transparent heat-conducting plate 63 during the mixing process, the infrared optical fiber temperature sensor 62 cannot detect the temperature of other parts of the concrete. At this time, the scraper plates 18 rotate together with the agitator 3, and can scrape the concrete whose temperature has been detected on the surface of the transparent heat-conducting plate 63 to one side.

[0021] The protective cover 7 is fixedly arranged on the outside of the mixing tank 1. A plurality of uniformly distributed semiconductor refrigeration rods 8 are fixedly arranged on the outer wall of the protective cover 7. One end of the semiconductor refrigeration rod 8 extends to the outside of the protective cover 7, and the other end of the semiconductor refrigeration rod 8 extends to the outside of the protective cover 7. An annular heat conducting plate 9 is arranged between the protective cover 7 and the mixing tank 1. The annular heat conducting plate 9 can conduct the heat or cold generated inside the protective cover 7 to the inside of the mixing tank 1, so as to heat or cool the concrete.

[0022] The current switching mechanism 10 is arranged on the top of the mixing tank 1, and the current switching mechanism 10 and the semiconductor refrigeration rod 8 are electrically connected to the external power supply. The current switching mechanism 10 includes a shell 101 fixedly arranged on the top of the mixing tank 1, and a current switching motor 102 is fixedly arranged on the top of the shell 101. The output shaft of the current switching motor 102 extends into the interior of the shell 101 and is laterally fixed with a double-headed cylinder 103. Both movable ends of the double-headed cylinder 103 are fixed with movable electrode sheets 104. Both sides of the shell 101 are fixed with fixed electrode sheets 105 corresponding to the positions of the movable electrode sheets 104. When the concrete needs to be heated, the double-headed cylinder 103 is controlled to extend directly so that the movable electrode sheets 104 and the fixed electrode sheets 105 are connected. The electrode pieces 105 are in contact. At this time, the end of the semiconductor refrigeration rod 8 located inside the protective cover 7 can generate heat, and the end of the semiconductor refrigeration rod 8 located outside the protective cover 7 can generate cooling. When the concrete needs to be cooled, the current switching motor 102 is controlled to work, and the current switching motor 102 drives the double-headed cylinder 103 to rotate 180°, so that the movable electrode pieces 104 on the two movable ends of the double-headed cylinder 103 are exchanged, and then the double-headed cylinder 103 is controlled to extend, which can push the two movable electrode pieces 104 to contact with the fixed electrode piece 105. At this time, the current direction leading to the semiconductor refrigeration rod 8 is opposite, so that the end of the semiconductor refrigeration rod 8 located inside the protective cover 7 can be cooled, and the end located outside the protective cover 7 can be heated.

[0023] The pre-wetting tank 11 is arranged on one side of the mixing tank 1. The outer shells of the mixing tank 1 and the pre-wetting tank 11 are both made of heat-insulating shells, which can reduce the influence of the external temperature on the inside of the mixing tank 1 and the pre-wetting tank 11. For example, the external high-temperature heat and low-temperature cold enter the inside of the mixing tank 1 and the pre-wetting tank 11. The bottom of the mixing tank 1 and the bottom of the pre-wetting tank 11 are both provided with supporting legs, which can lift the mixing tank 1 and the pre-wetting tank 11 to a certain height. Aggregates are stored in the pre-wetting tank 11. The top of the pre-wetting tank 11 A feed cover 12 is provided on the top, and a discharge cover 13 is provided on one side of the pre-wetting tank 11. A pipeline mechanism 14 is provided between the pre-wetting tank 11 and the stirring tank 1. An exhaust pipe 15 is provided on the side wall of the pre-wetting tank 11. The end of the exhaust pipe 15 located outside the pre-wetting tank 11 is inclined upward, and a condenser 151 is fixedly installed inside the exhaust pipe 15. After the water vapor in the exhaust gas pre-wet the aggregate, a small amount of water vapor still remains in the gas. At this time, it is condensed through the condenser 151 and flows into the inside of the pre-wetting tank 11.

[0024] The pipeline mechanism 14 includes a steam pipe 141 fixedly arranged between the mixing tank 1 and the pre-wetting tank 11, and an exhaust fan 142 is fixedly installed on the pipe wall of the steam pipe 141. Part of the pipe wall of the steam pipe 141 passes through the interior of the protective cover 7. The exhaust fan 142 can absorb water vapor into the interior of the steam pipe 141, and the water vapor flows into the uniformly distributed pipe 19 inside the pre-wetting tank 11 along the steam pipe 141. At the same time, a section of the steam pipe 141 is arranged inside the protective cover 7, so that the discharged water vapor can be heated or cooled, so that the temperature of the water vapor is maintained between 10°C and 30°C, thereby improving the pre-wetting effect on the aggregate.

[0025] A uniformly distributed pipe 19 is fixedly provided inside the pre-wetting tank 11, one side of the uniformly distributed pipe 19 is fixedly connected to one end of the steam pipe 141, the uniformly distributed pipe 19 comprises an annular pipe 191 and a plurality of straight pipes 192, one end of the plurality of straight pipes 192 are fixedly connected to the pipe wall of the annular pipe 191, and the pipe wall of the straight pipe 192 is provided with a plurality of uniformly distributed air outlet holes 193, water vapor can be uniformly discharged into the interior of the pre-wetting tank 11 through the annular pipe 191 and the plurality of straight pipes 192, so that the aggregate can be uniformly pre-wetted.

[0026] A PLC controller 16 and a signal hub 17 are fixedly provided on the top of the stirring tank 1 , and the stirring motor 2 , the temperature detection mechanism 6 , the semiconductor refrigeration rod 8 , the current switching mechanism 10 , the pipeline mechanism 14 and the signal hub 17 are all electrically connected to the PLC controller 16 .

[0027] The operating principle of the present invention is described as follows: the staff first uses a conveyor to feed the aggregate (sand and stone) into the mixing tank 1 through the feed pipe 4, and then adds water to the aggregate in a quantitative manner for pre-wetting. At the same time, the stirring motor 2 is started by the PLC controller 16, and the stirring motor 2 drives the stirrer 3 to rotate, so that the aggregate is stirred, thereby achieving uniform pre-wetting. In this process, the staff can use a method of adding water in small amounts and multiple times, and sense the degree of wetness of the aggregate by touching it, so as to avoid excessive pre-wetting. If obvious water droplets gather on the surface of the aggregate, it may be that the amount of pre-wetting water is too much; if it still feels dry to the touch, it may be that the amount of pre-wetting water is insufficient, because it is impossible to judge the degree of pre-wetting of the aggregate by instrument detection during the preparation process. This method has the highest efficiency. After the pre-wetting is completed, cement is added to the mixing tank 1 through the conveyor, and the stirring motor 2 is kept running during the cement addition process. Finally, water and admixtures are added to the mixing tank 1; During the mixing process, the infrared fiber optic temperature sensors 62 located at the upper, middle and lower parts of the mixing tank 1 detect the surface temperature of the concrete (this is to use the characteristic of the concrete surface radiating infrared rays outward, and the infrared fiber optic temperature sensors 62 receive the infrared radiation emitted by the concrete surface, thereby obtaining the temperature information during the concrete mixing process. Since the concrete is in a continuous stirring state, the three sensors can comprehensively measure the surface temperature of the concrete. The data signals detected by the three sensors are fed back to the signal hub 17. The circuit of the signal hub 17 processes these data signals and merges them into a common data signal channel, and then outputs a comprehensive data signal and feeds it back to the PLC controller 16). The PLC controller 16 judges the concrete mixing temperature based on this. If the temperature is lower than 10°C, the cement hydration reaction slows down. To compensate for this situation, the PLC controller 16 increases the current to the stirring motor 2, so that the stirring motor 2 drives the stirrer 3 to rotate at high power, speeds up the stirring efficiency, and allows the components to be mixed more evenly, creating better conditions for the subsequent hydration reaction, which helps to improve the early strength of the concrete. If the temperature is higher than 30°C, the evaporation rate of water will be significantly accelerated, and the concrete mixing requires sufficient water to ensure the normal cement hydration reaction. Excessive evaporation of water will lead to a decrease in the working performance of the concrete, such as poor slump and fluidity. If the stirring efficiency is too high, it will further aggravate the evaporation of water. Therefore, the PLC controller 16 reduces the current to the stirring motor 2, so that the stirring motor 2 drives the stirrer 3 to rotate at low power. When the temperature is between 10°C and 30°C, the cement hydration reaction process is stable, and there is no need to adjust the stirring efficiency of the stirring motor 2 and the stirrer 3. When the surface temperature of the concrete is lower than 10°C, the PLC controller 16 controls the double-headed cylinder 103 to extend so that the movable electrode sheets 104 on its two moving ends are respectively in contact with the fixed electrode sheets 105 on both sides, so that the movable electrode sheets 104, the fixed electrode sheets 105 and the semiconductor refrigeration rod 8 are connected to the external power supply circuit. At this time, the end of the semiconductor refrigeration rod 8 located inside the protective cover 7 generates heat, and the end located outside the protective cover 7 generates cooling. The heat inside the protective cover 7 is transferred to the inside of the mixing tank 1 through the annular heat conduction plate 9, and the concrete in the mixing tank 1 is heated and heated to a temperature of 10°C-30°C, thereby ensuring the quality of concrete mixing. When the surface temperature of the concrete is higher than 30°C, the PLC controller 16 controls the current switching motor 102 to work, and the current switching motor 102 drives the double-headed cylinder 103 rotates 180°, so that the movable electrode sheet 104 at the moving end of the double-headed cylinder 103 is replaced, and then the PLC controller 16 controls the double-headed cylinder 103 to extend, and the double-headed cylinder 103 pushes the two movable electrode sheets 104 to contact the fixed electrode sheet 105. At this time, the movable electrode sheet 104, the fixed electrode sheet 105 and the semiconductor refrigeration rod 8 are connected to the circuit and the current is reversed. The end of the semiconductor refrigeration rod 8 located inside the protective cover 7 is cooling, and the end located outside the protective cover 7 is heating. The coldness inside the protective cover 7 is transferred to the inside of the mixing tank 1 through the annular heat conduction plate 9, and the concrete in the mixing tank 1 is cooled and cooled to a temperature of 10°C-30°C, thereby ensuring the mixing quality of the concrete. Due to the continuous stirring of the mixing motor 2 and the stirrer 3, the concrete can be evenly heated and cooled; The water vapor generated during the concrete mixing process is controlled by the staff operating the PLC controller 16 to control the exhaust fan 142 to work. The exhaust fan 142 sucks the water vapor into the steam pipe 141, and the water vapor flows along the steam pipe 141 into the uniform distribution pipe 19 inside the pre-wetting tank 11, and the aggregate in the pre-wetting tank 11 is uniformly pre-wetted, so that the water vapor is recycled and reused, and the additional energy consumption is reduced. The steam pipe 141 passes through the inside of the protective cover 7. When the surface temperature of the concrete is lower than 10°C, the temperature of the water vapor generated is relatively low. For example, when the surface temperature of the concrete is 2°C, the water vapor temperature is 6°C-8°C. The steam pipe 141 can use the heat inside the protective cover 7 to The water vapor is heated to raise its temperature to 10°C-30°C, thereby improving the pre-wetting effect on the aggregate in the pre-wetting tank 11. When the surface temperature of the concrete is higher than 30°C, the water vapor in the steam pipe 141 can be cooled and cooled to reduce its temperature to 10°C-30°C, thereby also improving the pre-wetting effect on the aggregate in the pre-wetting tank 11. The pre-wetting temperature range of the aggregate is 10°C-30°C. It should be emphasized that the heating and cooling of the concrete are synchronized with the heating and cooling of the water vapor, so the internal temperature of the heating jacket is exactly the temperature required for the water vapor to be processed, and the amount of water vapor generated during the mixing process is far from enough to over-pre-wet the aggregate, so there is no need to consider this issue. After the water vapor pre-wetted the aggregate in the pre-wetting tank 11, a small amount of water vapor usually remains in the gas. When the gas is discharged through the exhaust pipe 15, the condenser 151 inside the exhaust pipe 15 condenses the small amount of water vapor, liquefies it into water droplets and falls back into the pre-wetting tank 11, ensuring that the discharged gas does not contain water vapor; After the concrete mixing is completed, it is discharged for use through the discharge pipe 5 at the bottom of the mixing tank 1, and then the discharge cover 13 on the side wall of the pre-wetting tank 11 is opened to convey the pre-wetted aggregate to the inside of the mixing tank 1 through a conveyor. Subsequent workers can reduce the amount of pre-wetting water when pre-wetting the aggregate, thereby reducing additional energy consumption.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A concrete preparation and mixing device for engineering construction, comprising a mixing tank (1), a mixing motor (2) and a stirrer (3), wherein a feed pipe (4) is arranged at the top of the mixing tank (1), and a discharge pipe (5) is arranged at the bottom of the mixing tank (1), the mixing motor (2) is fixedly mounted on the top of the mixing tank (1), the stirrer (3) is located inside the mixing tank (1), and the stirrer (3) is fixedly connected to the mixing motor (2), characterized in that: Also includes: A temperature detection mechanism (6) is arranged on the inner wall of the stirring tank (1), wherein the number of the temperature detection mechanisms (6) is three and they are arranged respectively on the top, middle and bottom of the side wall of the stirring tank (1); A protective sleeve (7) is fixedly arranged outside the stirring tank (1); a plurality of uniformly distributed semiconductor refrigeration rods (8) are fixedly arranged on the outer wall of the protective sleeve (7); one end of the semiconductor refrigeration rod (8) extends to the outside of the protective sleeve (7); and the other end of the semiconductor refrigeration rod (8) extends to the outside of the protective sleeve (7); and an annular heat conduction plate (9) is arranged between the protective sleeve (7) and the stirring tank (1); A current switching mechanism (10) is arranged on the top of the stirring tank (1), and the current switching mechanism (10) and the semiconductor refrigeration rod (8) are both electrically connected to an external power source; A pre-wetting tank (11) is arranged on one side of the stirring tank (1), and aggregate is stored inside the pre-wetting tank (11); a feed cover (12) is arranged on the top of the pre-wetting tank (11), and a discharge cover (13) is arranged on one side of the pre-wetting tank (11); a pipeline mechanism (14) is arranged between the pre-wetting tank (11) and the stirring tank (1), and an exhaust pipe (15) is arranged on the side wall of the pre-wetting tank (11); A PLC controller (16) and a signal hub (17) are fixedly provided on the top of the stirring tank (1), and the stirring motor (2), the temperature detection mechanism (6), the semiconductor refrigeration rod (8), the current switching mechanism (10), the pipeline mechanism (14) and the signal hub (17) are all electrically connected to the PLC controller (16).

2. The concrete preparation and mixing device for engineering construction according to claim 1, characterized in that: The temperature detection mechanism (6) comprises a heat-insulating tube (61) fixedly arranged on the side wall of the stirring tank (1) and the side wall of the protective sleeve (7), an infrared optical fiber temperature sensor (62) is fixedly installed inside the heat-insulating tube (61), and a transparent heat-conducting plate (63) is fixedly arranged at the opening of the heat-insulating tube (61).

3. The concrete preparation and mixing device for engineering construction according to claim 1, characterized in that: Scraping plates (18) are fixedly provided at positions corresponding to the positions of the temperature detection mechanism (6) on both sides of the blades of the stirrer (3), and the scraping plates (18) can be arranged in contact with the transparent heat conducting plate (63).

4. The concrete preparation and mixing device for engineering construction according to claim 1, characterized in that: The current switching mechanism (10) comprises a shell (101) fixedly arranged on the top of the stirring tank (1), a current switching motor (102) being fixedly arranged on the top of the shell (101), an output shaft of the current switching motor (102) extending into the interior of the shell (101) and being laterally fixedly arranged with a double-headed cylinder (103), both movable ends of the double-headed cylinder (103) being fixedly arranged with movable electrode sheets (104), and both sides of the shell (101) being fixedly arranged with fixed electrode sheets (105) corresponding to the positions of the movable electrode sheets (104).

5. The concrete preparation and mixing device for engineering construction according to claim 1, characterized in that: The pipeline mechanism (14) comprises a steam pipe (141) fixedly arranged between the stirring tank (1) and the pre-wetting tank (11), and an exhaust fan (142) is fixedly mounted on the pipe wall of the steam pipe (141), and part of the pipe wall of the steam pipe (141) passes through the interior of the protective cover (7).

6. The concrete preparation and mixing device for engineering construction according to claim 1, characterized in that: One end of the exhaust pipe (15) located outside the pre-wetting tank (11) is arranged to be tilted upward, and a condenser pipe (151) is fixedly installed inside the exhaust pipe (15).

7. The concrete preparation and mixing device for engineering construction according to claim 1, characterized in that: A uniformly distributed pipe (19) is fixedly provided inside the pre-wetting tank (11), one side of the uniformly distributed pipe (19) is fixedly connected to one end of the steam pipe (141), the uniformly distributed pipe (19) comprises an annular pipe (191) and a plurality of straight pipes (192), one end of each of the plurality of straight pipes (192) is fixedly connected to the pipe wall of the annular pipe (191), and the pipe wall of the straight pipe (192) is provided with a plurality of uniformly distributed air outlet holes (193).

8. The concrete preparation and mixing device for engineering construction according to claim 1, characterized in that: The outer shell of the stirring tank (1) and the outer shell of the pre-wetting tank (11) are both heat-insulating shells, and the bottom of the stirring tank (1) and the bottom of the pre-wetting tank (11) are both provided with supporting legs.

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