A water constant temperature system for a mixing plant

Abstract

This utility model relates to a constant temperature water system for a concrete mixing plant, comprising a mounting plate, a water storage tank, and a water pump. The center of the bottom surface of the water storage tank is rotatably connected to the mounting plate. A driven pulley is fixedly fitted at the bottom of the water storage tank. The water inlet of the water pump extends into the water storage tank through an inlet pipe. A forward and reverse motor is mounted on one side of the mounting plate via a support. A drive pulley is mounted on the output shaft of the forward and reverse motor, and the drive pulley and the driven pulley are connected by a belt drive. A cover plate is mounted on the outer wall of the water storage tank via a fixed bracket. A stirring shaft is rotatably mounted on the bottom surface of the cover plate via a bearing seat. The upper end of the stirring shaft passes through the cover plate and is connected to the rotating end of a steam rotary joint. The fixed end of the steam rotary joint is connected to a high-pressure steam pipeline. A steam chamber is provided inside the stirring shaft. Stirring impellers are installed at intervals inside the water storage tank. A steam injection pipe is connected between two adjacent stirring impellers on the stirring shaft, and a steam outlet is provided on the steam injection pipe. This utility model can quickly improve water heating efficiency, provide constant temperature water for concrete mixing, and effectively prevent concrete from solidifying.

Description

Technical Field

[0001] This utility model relates to the field of mixing plant technology, specifically to a water constant temperature system for mixing plants. Background Technology

[0002] In the construction of tunnels, bridges, and roads, concrete needs to be produced. Controlling the temperature rise during concrete production is crucial, especially in cold winters when low water temperatures can cause the concrete to harden and solidify during mixing. Therefore, the method for controlling temperature rise has shifted to controlling the water temperature during concrete production. Existing water temperature control systems use electric heaters within water tanks, implemented through electronic control, which is energy-intensive and costly.

[0003] In addition, in the existing technology, when electric heating is used to heat the water in the tank, the water near the heater heats up faster, while the water in other parts heats up slower. This results in uneven heating inside the tank and low heating efficiency. When needed, it is impossible to guarantee a constant water temperature, which will affect the mixing quality of concrete and thus the construction quality. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a water constant temperature system for a mixing plant. It utilizes the reciprocating rotation of the water storage tank and the high-temperature steam ejected from the steam injection pipe on the mixing shaft to agitate and contact the water, thereby improving the steam heating efficiency. Compared with electric heating, it saves energy and reduces costs while improving heating efficiency, ensuring the mixing quality of concrete.

[0005] This utility model is achieved through the following technical solution: A water constant temperature system for a mixing plant is provided, including a mounting plate and a water storage tank and a water pump mounted on the mounting plate. The bottom center of the water storage tank is rotatably connected to the mounting plate via a rotating shaft and bearings. A driven pulley is fixedly fitted onto the bottom of the water storage tank. The water pump is located on one side of the water storage tank and fixedly connected to the mounting plate. The water inlet of the water pump extends into the water storage tank via an inlet pipe. A forward and reverse motor is mounted on one side of the mounting plate via a support. A drive pulley is mounted on the output shaft of the forward and reverse motor. The drive pulley and the driven pulley are connected by a belt drive. The outer wall is movably mounted with an openable cover plate via a [-shaped fixing frame. The bottom surface of the cover plate is rotatably mounted with a stirring shaft via a bearing seat. The upper end of the stirring shaft rotates through the cover plate and connects to the rotating end of the steam rotary joint on the cover plate. The fixed end of the steam rotary joint is connected to a high-pressure steam pipe. The stirring shaft has a steam chamber that communicates with the high-pressure steam pipe. The stirring shaft has stirring impellers installed vertically and vertically in the water storage tank. The stirring shaft connects multiple steam injection pipes that communicate with the steam chamber between two adjacent stirring impellers. Steam outlet holes are evenly opened on each steam injection pipe.

[0006] Furthermore, the upper horizontal part of the fixing frame is vertically threaded with a lead screw coaxial with the water storage tank. A rotating disk is installed at the upper end of the lead screw, and the lower end of the lead screw passes through the upper horizontal part and is rotatably connected to the cover plate through a bearing. The cover plate vertically fixes a guide rod on one side of the lead screw, and the upper end of the guide rod passes through the upper horizontal part and is movably connected to the upper horizontal part.

[0007] The upper horizontal part of the fixed frame is connected to a cover plate by a screw. The screw can be rotated by a rotating disk to open and close the cover plate, which facilitates the maintenance of the water tank. The guide rod can limit the up and down movement of the cover plate when the screw rotates, ensuring the stability of its opening and closing.

[0008] Furthermore, there are three steam injection pipes. The steam injection pipes are arc-shaped, with one end fixed to the stirring shaft and the other end closed. The three steam injection pipes are arranged in a circular array with the stirring shaft as the axis. The steam outlet on each steam injection pipe is opened on the inner arc surface of the steam injection pipe.

[0009] Three steam injection pipes are arranged in a circular array. The jet holes are opened on the inner arc surface of the arc-shaped pipe, which allows the high-pressure steam injection to react with the steam injection pipes, causing the steam injection pipes to drive the stirring shaft to rotate, which in turn drives the stirring impeller to stir the water in the water storage tank, thereby improving the heating efficiency.

[0010] Furthermore, a through hole is provided on the cover plate, through which the water inlet pipe enters the water storage tank. A corrugated pipe section is provided above the cover plate for the water inlet pipe.

[0011] The through holes on the cover plate are for the water inlet pipe to pass through. The water inlet pipe has a corrugated section above the cover plate to adjust its length, ensuring that the water inlet pipe does not affect the operation of the cover plate when it is raised, lowered and opened.

[0012] Furthermore, the outlet of the water pump is connected to the concrete mixing drum through an outlet pipe. A temperature compensation mechanism is installed on the outlet pipe, which includes an electric heater and a compensation water tank. A compensation pump is connected between the compensation water tank and the outlet pipe through a compensation pipe. Temperature sensor I and a one-way valve are installed sequentially in the outlet pipe between the electric heater and the compensation pipe along the water outlet direction. Temperature sensor II is installed at the outlet of the outlet pipe.

[0013] A temperature compensation mechanism is installed on the water pump's outlet pipe. An electric heater is set up to compensate for the outlet water temperature. In winter, when the air temperature is low and the outlet water temperature is low, the electric heater is activated to assist in heating so that the outlet water temperature meets the usage requirements. In summer, when the air temperature is high and the outlet water temperature is high, the electric heater is turned off and the compensation pump is activated. The water in the compensation tank exchanges heat with the high-temperature water in the outlet pipe to reduce the outlet water temperature in the outlet pipe so that the outlet water temperature meets the usage requirements.

[0014] Furthermore, the water storage tank is covered with an insulation layer.

[0015] The water storage tank is wrapped with an insulation layer, which can effectively prevent heat loss, improve insulation efficiency, and thus reduce heat loss.

[0016] The beneficial effects of this utility model are: This invention uses high-pressure steam to heat room-temperature water in a water storage tank, replacing the traditional electric heating method. This effectively reduces energy consumption. During steam heating, the forward and reverse rotation of a motor drives the water storage tank to rotate back and forth, ensuring full contact between the water in the tank and the stirring shaft on the cover. Steam is ejected through a steam spray pipe and contacts the constantly agitated water for heat transfer, improving the heat exchange efficiency of the water in the tank. Simultaneously, the steam injection drives the steam spray pipe to rotate, which in turn drives the stirring shaft to rotate, causing the stirring impeller on the stirring shaft to follow the rotation, stirring the water in the tank. This further increases the contact area with the steam, improves heat exchange efficiency, and enables rapid heating of the water stored in the tank.

[0017] This invention also includes a temperature compensation mechanism on the outlet pipe. When the outlet water temperature is low, an electric heater is used to assist in heating. When the outlet water temperature is high, a compensation pump is used to pump water from the compensation tank into the outlet pipe for mixing to achieve auxiliary cooling of the outlet water, thereby effectively ensuring a constant outlet water temperature and guaranteeing the quality of concrete mixing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the water constant temperature system for the mixing plant of this utility model.

[0019] Figure 2 This is a cross-sectional schematic diagram of the water storage tank in this utility model.

[0020] Figure 3 This is a schematic diagram of the temperature compensation mechanism in this utility model.

[0021] Figure 4 This is a top view of the installation of the steam injection pipe and the stirring shaft in this utility model.

[0022] As shown in the figure: 1. Mounting plate, 2. Water storage tank, 3. Water pump, 4. Driven pulley, 5. Water inlet pipe, 6. Forward and reverse motor, 7. Drive pulley, 8. Belt, 9. Fixing frame, 10. Cover plate, 11. Stirring shaft, 12. Steam rotary joint, 13. Steam pipe, 14. Lead screw, 15. Rotary disc, 16. Guide rod, 17. Water outlet pipe, 18. Temperature compensation mechanism, 19. Solenoid valve, 20. Stirring impeller, 21. Steam injection pipe, 22. Steam outlet, 23. Electric heater, 24. Temperature sensor I, 25. Check valve, 26. Temperature sensor II, 27. Compensation pipe, 28. Compensation pump, 29. Compensation water tank, 30. Steam chamber. Detailed Implementation

[0023] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0024] like Figures 1-4 As shown, a water constant temperature system for a mixing plant includes a mounting plate 1, a water storage tank 2 and a water pump 3 mounted on the mounting plate 1. The water storage tank 2 is covered with an insulation layer. The center of the bottom surface of the water storage tank 2 is rotatably connected to the mounting plate 1 via a rotating shaft and bearings. A driven pulley 4 is fixedly fitted onto the bottom of the water storage tank 2. The water pump 3 is located on one side of the water storage tank 2 and is fixedly connected to the mounting plate 1. The water inlet of the water pump 3 extends into the water storage tank 2 through an inlet pipe 5. A forward and reverse motor 6 is mounted on one side of the mounting plate 1 via a support. A drive pulley 7 is mounted on the output shaft of the forward and reverse motor 6. The drive pulley 7 and the driven pulley 4 are connected by a belt 8. A cover plate 10 that can be opened and closed is movably installed on the wall through a fixed bracket 9. The bottom surface of the cover plate 10 is rotatably mounted with a stirring shaft 11 through a bearing seat. The upper end of the stirring shaft 11 rotates through the cover plate 10 and is connected to the rotating end of the steam rotary joint 12 on the cover plate 10. The fixed end of the steam rotary joint 12 is connected to the high-pressure steam pipe 13. The stirring shaft 11 is provided with a steam chamber 30 that communicates with the high-pressure steam pipe 13. The stirring shaft 11 is equipped with stirring impellers 20 at intervals in the water storage tank 2. The stirring shaft 11 is connected to multiple steam injection pipes 21 that communicate with the steam chamber 30 between two adjacent stirring impellers 20. Each steam injection pipe 21 has evenly opened steam outlet holes 22.

[0025] The upper horizontal section of the fixed frame 9 is vertically threaded with a lead screw 14 coaxial with the water storage tank 2. A rotating disk 15 is installed at the upper end of the lead screw 14, and the lower end of the lead screw 14 passes through the upper horizontal section and is rotatably connected to the cover plate 10 through a bearing. The cover plate 10 vertically fixes a guide rod 16 on one side of the lead screw 14. The upper end of the guide rod 16 passes through the upper horizontal section and is movably connected to the upper horizontal section. In this embodiment, three steam injection pipes 21 are provided. The steam injection pipes 21 are arc-shaped, with one end fixed to the stirring shaft 11 and the other end closed. The three steam injection pipes 21 are arranged in a circular array with the stirring shaft 11 as the axis. The steam outlet hole 22 on each steam injection pipe 21 is opened on the inner arc surface of the steam injection pipe 21.

[0026] A through hole is provided on the cover plate 10, and the water inlet pipe 5 enters the water storage tank 2 through the through hole. The water inlet pipe 5 is provided with a corrugated pipe section above the cover plate 10 and at the fixed end connection end of the steam pipe and the steam rotary joint 12. The corrugated pipe section can expand and contract appropriately, which facilitates the opening and closing operation of the cover plate 10 and the reciprocating small-angle rotation of the water storage tank 2 to perform appropriate expansion and contraction actions.

[0027] The outlet of the water pump 3 is connected to the concrete mixing drum through the outlet pipe 17. A temperature compensation mechanism 18 is installed on the outlet pipe 17. The temperature compensation mechanism 18 includes an electric heater 23 and a compensation water tank 29. The compensation water tank 29 and the outlet pipe 17 are connected to a compensation pump 28 through a compensation pipe 27. A temperature sensor I24 and a one-way valve 25 are installed sequentially in the outlet pipe 17 between the electric heater 23 and the compensation pipe 27 along the water outlet direction. A temperature sensor II26 is installed at the end outlet of the outlet pipe 17.

[0028] The working process of this utility model: When using constant-temperature water for concrete mixing, an appropriate amount of room-temperature water is pumped into the water storage tank 2, and the solenoid valve 19 of the steam pipe 13 is opened to connect the steam pipe 13 to the air chamber 30 of the mixing shaft 11. Steam is ejected through the steam injection pipe 21 and the steam outlet 22 and exchanges heat with the room-temperature water. The high-pressure steam, while being injected, reacts to the steam injection pipe 21, causing it to rotate around the mixing shaft 11. The mixing impeller 20 on the mixing shaft 11 rotates, continuously stirring the water in the water storage tank 2, increasing the heat exchange contact area with the steam, and thus improving the steam's heat exchange efficiency. Simultaneously, the forward and reverse motor 6 can be started. The forward and reverse motor 6 can rotate periodically, driving the drive pulley 7 in conjunction with the belt 8 to drive the driven pulley 4 and the water storage tank 2 to rotate periodically. The rotation angle can be between 30° and 60°. Through the reciprocating rotation in both directions, the water in the water storage tank 2 can be repeatedly agitated and mixed, further increasing the contact area with the high-temperature steam and improving heating efficiency.

[0029] When the temperature is low in winter and the heating efficiency relying on steam is not high, the electric heater 23 of the temperature compensation mechanism 18 can be activated to reheat the water. The temperature is measured by the temperature sensor I24. When the water temperature reaches the specified temperature, it is discharged into the mixing drum through the outlet terminal of the outlet pipe 17 for concrete mixing. When the water temperature after secondary heating is detected to exceed the set temperature, the compensation pump 28 can be activated to pump the cold water in the compensation water tank 29 into the outlet pipe 17 for temperature neutralization. After heat exchange, the temperature sensor II26 measures that the set temperature has been reached, and the water is discharged into the mixing drum through the outlet terminal of the outlet pipe 17.

[0030] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A water constant temperature system for a mixing station, comprising a mounting plate, a water storage tank and a water pump arranged on the mounting plate, characterized in that: The bottom center of the water storage tank is rotatably connected to the mounting plate via a rotating shaft and bearings. A driven pulley is fixedly fitted at the bottom of the water storage tank. The water pump is located on one side of the water storage tank and is fixedly connected to the mounting plate. The water inlet of the water pump extends into the water storage tank through an inlet pipe. A forward and reverse motor is mounted on one side of the mounting plate via a support. The output shaft of the forward and reverse motor is equipped with a drive pulley, which is connected to the driven pulley via a belt drive. An openable cover plate is movably mounted on the outer wall of the water storage tank via a [-shaped fixed frame]. A stirring shaft is rotatably mounted on the bottom surface of the cover plate via a bearing seat. The upper end of the stirring shaft rotates through the cover plate and connects to the rotating end of a steam rotary joint on the cover plate. The fixed end of the steam rotary joint is connected to a high-pressure steam pipe. The stirring shaft has a steam chamber connected to the high-pressure steam pipe. Stirring impellers are installed vertically and horizontally on the stirring shaft inside the water storage tank. Multiple steam injection pipes connected to the steam chamber are connected between two adjacent stirring impellers. Steam outlet holes are evenly opened on each steam injection pipe.

2. The mixing station water thermostatic system of claim 1, wherein: The upper horizontal part of the fixed frame is vertically threaded with a lead screw coaxial with the water storage tank. A rotating disk is installed at the upper end of the lead screw, and the lower end of the lead screw passes through the upper horizontal part and is rotatably connected to the cover plate through a bearing. The cover plate vertically fixes a guide rod on one side of the lead screw, and the upper end of the guide rod passes through the upper horizontal part and is movably connected to the upper horizontal part.

3. The mixing station water thermostatic system of claim 1, wherein: There are three steam injection pipes. The steam injection pipes are arc-shaped, with one end fixed to the stirring shaft and the other end closed. The three steam injection pipes are arranged in a circular array with the stirring shaft as the axis. The steam outlet of each steam injection pipe is opened on the inner arc surface of the steam injection pipe.

4. The mixing station water thermostatic system of claim 1, wherein: A through hole is provided on the cover plate, through which the water inlet pipe enters the water storage tank. A corrugated pipe section is provided above the cover plate for the water inlet pipe.

5. The mixer station water thermostatic system of claim 1, wherein: The outlet of the water pump is connected to the concrete mixing drum through the outlet pipe. A temperature compensation mechanism is installed on the outlet pipe, which includes an electric heater and a compensation water tank. A compensation pump is connected between the compensation water tank and the outlet pipe through a compensation pipe. Temperature sensor I and a one-way valve are installed sequentially in the outlet pipe between the electric heater and the compensation pipe along the water outlet direction. Temperature sensor II is installed at the outlet of the outlet pipe.

6. The mixer station water thermostatic system of claim 1, wherein: The water storage tank is covered with an insulation layer.

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