A self-following heat treatment device for blades in a mixing drum

Abstract

The present invention relates to the field of concrete mixing and conveying devices, primarily comprising a mixing drum, a control device, and a heating and cooling device. During operation, the mixing drum is subjected to rotational motion, while a power slide is subjected to axial motion. The power slide drives the heating and cooling device along the trajectory of the blade tips, thereby achieving the purpose of heat treating the tops of welded spiral mixing blades within the drum. The present invention has a low design cost and is easy to operate. While improving the wear resistance of the mixing blades, it also solves the problem of blade cracking during the welding process after heat treatment, as well as certain issues that rely on the three-dimensional trajectory of the blades for heat treatment.

Description

Technical Field

[0001] The present invention relates to the field of concrete mixing and transportation devices, in particular to a device for heating and cooling blades in a mixing drum and an implementation method thereof. Background Art

[0002] With the rapid development of China's infrastructure, concrete has been widely used and promoted in my country's infrastructure construction. Along with this, the manufacturing and transportation methods of concrete have also developed rapidly. Among them, concrete mixer trucks have the advantages of convenient operation, high efficiency, simple maintenance, strong passability, and the ability to enter various construction sites with harsh conditions. Therefore, they have become the main construction machinery in the concrete transportation process.

[0003] The concrete mixer drum is a key component of a concrete mixer truck, and the spiral mixing blades within it play a decisive role in its performance. However, in the actual use of concrete mixer trucks, after a period of use, the spiral mixing blades within the mixer drum will suffer severe wear, resulting in deformation, thinning of the blade tips, and even cracks. This in turn reduces concrete mixing uniformity, slows material loading and unloading speeds, increases maintenance costs, and reduces the efficiency and reliability of the entire vehicle.

[0004] In the existing Chinese patent document CN2011201753791, a method for connecting blades inside a mixing drum is disclosed. The mixing drum blade structure manufactured in this way has better wear resistance and flow guidance effect, thereby achieving the purpose of extending the service life while making the mixing more uniform; there is also a part of the patent document CN2021109079220, which achieves the purpose of changing the blade material structure by quenching heat treatment on the blades installed in the mixing drum to extend the service life; but in the above patent documents, the angle error problem generated by the blades after welding is ignored, which brings about the problem of error in the quenching heat treatment process formulated according to the blade trajectory and incomplete heat treatment.

[0005] In summary, how to provide a method and device with high production efficiency, simple operation and adaptability for improving the wear resistance of the top of the mixing blade of a concrete mixing drum is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the existing heat treatment device for blades in a mixing drum relies on the three-dimensional model and trajectory of the blades. The present invention provides a device that can ignore the welding and installation errors of the blades and use the equipment itself for heat treatment, which is convenient for heat treatment of mixing drums of different specifications and models in the workshop, so as to achieve the purpose of improving production performance and the wear resistance of the blades in the mixing drum and extending the service life of the concrete mixing drum.

[0007] The technical solution of the present invention is as follows: The present invention provides a self-following heat treatment device for blades in a mixing drum, comprising a mixing drum device, a control device, and a heating and cooling device;

[0008] The present invention provides a self-following heat treatment device for blades in a mixing drum, the mixing drum device comprising a mixing drum; the mixing drum is subjected to a rotational force to form a rotary motion with an axial direction as a rotation axis, and the speed of the rotary motion is adjusted by a control device;

[0009] The present invention relates to a self-following heat treatment device for blades in a mixing drum. The control module includes a microcomputer system and flow sensors and solenoid valves installed in the coolant pipeline and the oxygen and acetylene gas pipelines. The collected gas flow data is converted into a heating temperature and compared with the target heat treatment temperature, thereby controlling the opening of the solenoid valve to adjust the gas flow in the gas pipeline. The speed sensor installed on the first stepper motor sends the collected speed data to the control device, which compares the collected speed with the target speed generated by the control program to adjust the speed of the mixing drum in real time.

[0010] The present invention relates to a self-following heat treatment device for blades in a mixing drum, wherein the heating and cooling device comprises a guide rail device, a water tank, a power slide, a gas cylinder, and a treatment device; the guide rail device comprises a guide rail landing frame, a guide rail fixing seat, and a guide rail; the power slide comprises a slide and a first stepper motor; the treatment device comprises a spring piston cylinder, a universal cover, a blade fixing wheel, a swing rod, a telescopic direction wheel, a coolant nozzle, a clamping ear, and a heating device; the coolant nozzle and the heating device are fixed to the telescopic direction wheel through the clamping ear; the swing rod and the universal cover are movably connected by bolts, and the telescopic direction wheel is retracted. The interior of the steering wheel is hollow and has a spring. The swing rod extends into the interior of the telescopic steering wheel and is tightly attached to the spring. The blade fixing wheel is fixed in the groove of the universal cover. A telescopic steering wheel is installed in front and behind the blade fixing wheel respectively. The rollers of the three are clamped together at the top of the spiral blade. The heating device is fixed to the front telescopic steering wheel, and the coolant nozzle is fixed to the rear telescopic steering wheel. The first stepper motor is installed on the slide by screws to drive the slide to move horizontally on the guide rail. The spring piston cylinder is fixed to the slide by a groove. The slide moves horizontally and drives the movement of the processing device at the same time.

[0011] The present invention relates to a self-following heat treatment device for blades in a mixing drum. The swing arm and the universal cover are movably connected by bolts. That is, the swing arm can swing at a certain angle when connected to the universal cover, so that the direction and angle of the telescopic direction wheel can be changed when rolling on the spiral blade, thereby achieving the purpose of self-adaptation. The telescopic direction wheel and the swing arm are raised or lowered by an internal spring. The telescopic direction wheel can move in the vertical direction, so that the telescopic direction wheel can be adaptively adjusted when facing spiral blades of different curvatures and heights welded to the inner wall of the mixing drum.

[0012] The present invention relates to a self-following heat treatment device for blades in a mixing drum. The blade fixing wheel is fixed in a groove of a universal cover. The blade fixing wheel can be replaced through the groove to achieve heat treatment processes for different spiral blades. The size of the groove matches the top of the blade fixing wheel to adapt to changes in the blades of the mixing drum. When encountering T-shaped blades, the blade fixing wheel can be removed and replaced with a suitable model.

[0013] In the present invention, a heat treatment device with blades self-following in a mixing drum is provided. The first stepper motor is mounted on a slide by screws and is used to drive the slide to move in translation on a guide rail. The spring piston cylinder is fixed to the slide by a groove, and the slide moves in translation and simultaneously drives the movement of the treatment device.

[0014] The present invention relates to a self-following heat treatment device for blades in a mixing drum. A retractable direction wheel is respectively installed in front and behind the blade fixing wheel. When the mixing drum moves axially and rotates on the slide, the rollers of the three wheels are clamped together at the top of the spiral blade and roll along the top of the spiral blade. The heating device is fixed to the front retractable direction wheel, and the coolant nozzle is fixed to the rear retractable direction wheel. The coolant nozzle and the heating device follow the track of the top of the mixing drum blade through the retractable direction wheels.

[0015] The present invention provides a self-following heat treatment device for blades in a mixing drum. When heat treating the blades, the residence time of the heating device in the heating area is longer than the time required to heat the area to complete austenitization. After the heat treatment is completed, the area moves to the bottom of the coolant nozzle as the mixing drum rotates, and coolant is sprayed on the heated area to increase the cooling rate. The residence time of the heating device in the heating area is determined by the rotation speed of the mixing drum. During the heat treatment, a control device controls the rotation speed of the mixing drum by running a control program. The control device adjusts the speed and number of rotations of the first stepper motor by running the control program to control the movement of the slide and the spring piston cylinder in the axial direction of the mixing drum.

[0016] The present invention provides a self-following heat treatment device for blades in a mixing drum. The coolant nozzle and the heating device are fixed to a telescopic direction wheel via clamping ears. The clamping ears can adjust the tightness of the coolant nozzle and the heating device on the telescopic direction wheel by the number of turns of the bolt, thereby adjusting the angle of the coolant nozzle and the heating device. This allows the device to adapt to changes in the curvature of the blades at different parts of the mixing drum during the heat treatment process.

[0017] The present invention provides a self-following heat treatment device for blades within a mixing drum. The top of the spring piston cylinder is fixed within a slide, and the slide's translation drives the spring piston cylinder's movement on a guide rail. The bottom of the spring piston cylinder is a hollow, irregular sphere that mates with the solid sphere atop the universal cover, allowing the spring piston cylinder to rotate within a certain angle. The middle of the spring piston cylinder is a hollow solid with a spring attached. The spring contracts when squeezed by the bottom, allowing the device to expand and contract within the mixing drum with varying internal diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a schematic diagram of the structure of the guide rail device, power slide and heating and cooling device.

[0020] Figure 3 It is a structural diagram of the heating and cooling device.

[0021] Figure 4 This is a schematic diagram of the power slide structure.

[0022] Figure 5 Schematic diagram of the guide rail structure.

[0023] Figure 6 It is a schematic diagram of the cross-sectional structure of the spring piston cylinder.

[0024] In the figure: 1-mixing drum device, 2-control device, 3-heating and cooling device, 31-guide rail device, 32-water tank, 33-power slide, 34-gas cylinder, 35-processing device, 311-guide rail fixing seat, 312-guide rail, 313-floor stand, 351-spring piston cylinder, 352-universal cover, 353-blade fixing wheel, 354-swing rod, 355-telescopic direction wheel, 356-coolant nozzle, 357-clamping ear, 358-heating device. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention is as follows:

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0027] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0028] The present invention provides a self-following heat treatment device for blades in a mixing drum, which is characterized by comprising a mixing drum device (1), a control device (2), and a heating and cooling device (3);

[0029] The mixing drum device (1) comprises a mixing drum; the mixing drum is subjected to a rotational force to form a rotary motion with an axial direction as a rotation axis, and the speed of the rotary motion is regulated by a control device (2);

[0030] The control device (2) includes a microcomputer system and flow sensors and solenoid valves installed in the coolant pipeline and the oxygen and acetylene gas pipelines; the collected gas flow data is converted into the size of the heating temperature and compared with the target heat treatment temperature, thereby controlling the opening of the solenoid valve to adjust the gas flow in the gas pipeline; the speed sensor installed on the first stepper motor (332) sends the collected speed data to the control device (2), and the control device (2) compares the collected speed with the target speed generated by the control program to adjust the rotation speed of the mixing drum in real time;

[0031] The heating and cooling device (3) comprises a guide rail device (31), a water tank (32), a power slide (33), a gas cylinder (34), and a processing device (35); the guide rail device (31) comprises a guide rail fixing seat (311), a guide rail (312), and a landing frame (313); the power slide (33) comprises a slide (331) and a first stepper motor (332); the processing device (35) comprises a spring piston cylinder (351), a universal cover (352), a blade fixing wheel (353), a swing rod (354), a telescopic direction wheel (355), a cooling liquid nozzle (356), a clamping ear (357), and a heating device (358); the cooling liquid nozzle (356) and the heating device (358) are fixed by the clamping ear (357). The telescopic direction wheel (355), the swing rod (354) and the universal cover (352) are movably connected by bolts. The interior of the telescopic direction wheel (355) is hollow and has a spring. The swing rod (354) extends into the interior of the telescopic direction wheel (355) and is close to the spring. The swing rod (354) is raised or lowered by the extension and compression of the internal spring; the blade fixing wheel (353) is fixed in the groove of the universal cover (352) and can be replaced; the first stepper motor (332) is installed on the slide (331) by screws, and is used to drive the slide (331) to move horizontally on the guide rail (312); the spring piston cylinder (351) is fixed to the slide (331) by a groove, and the slide (331) moves horizontally and drives the movement of the processing device (35) at the same time.

[0032] The method for implementing the heat treatment of the blades in the mixing drum comprises the following steps:

[0033] S1, setting the starting point of heat treatment: the cooling liquid nozzle (356) and the heating device (358) are fixed to the telescopic direction wheel (355) through the clamping ear (357); the swing rod (354) and the universal cover (352) are movably connected by bolts, the interior of the telescopic direction wheel (355) is hollow and has a spring, the swing rod (354) extends into the interior of the telescopic direction wheel (355) and is close to the spring; the mixing drum device is fixed and given an initial rotation speed, the rotation of the mixing drum and the movement of the slide (331) are controlled, so that the cooling liquid nozzle (356) and the heating device (358) are at the starting point of the spiral blade at the rear conical end of the mixing drum, and the telescopic direction wheel (355) and the blade fixing wheel (353) are connected. The blade fixing wheel (353) is fixed at the top of the spiral blade of the mixing drum, and is fixed in the groove of the universal cover (352). The blade fixing wheel (353) can be replaced through the groove to realize the heat treatment process of different spiral blades. A telescopic direction wheel (355) is respectively installed in front and behind the blade fixing wheel (353). When the slide (331) performs axial translation and rotation of the mixing drum, the three rollers are clamped together at the top of the spiral blade and realize rolling along the top of the spiral blade. The heating device (358) is fixed to the front telescopic direction wheel (355), and the cooling liquid nozzle (356) is fixed to the rear telescopic direction wheel (355), and its position is set as the starting point of the heat treatment process.

[0034] S2, input characteristic parameters of the mixing drum and generate a control program: input characteristic parameters of the mixing drum to be heat-treated, such as blade height B, cylinder diameter D, rear cone diameter d1, front cone diameter d2, rear cone width L1, front cone width L2, cylindrical section width H, rear cone helical angle β1, cylindrical section helical angle β2, front cone helical angle β3, and mixing drum rotation speed ω, and the software in the control device (2) calculates the approximate motion trajectory of the spiral blade based on the input parameters, and decomposes the motion trajectory along the axial direction of the mixing drum, thereby determining the displacement and speed of the blade heat treatment device along the axial direction of the mixing drum during the heat treatment process, and generates a control program;

[0035] S3, run the program to perform heat treatment: the first stepper motor (332) is installed on the slide (331) by screws, and is used to drive the slide (331) to move horizontally on the guide rail (312) to realize the movement of the processing device (35) along the axial direction of the mixing drum; the spring piston cylinder (351) is fixed to the slide (331) through a groove, and the slide (331) moves horizontally and drives the movement of the processing device (35) at the same time. During operation, the swing rod (354) and the universal cover (352) are movably connected by bolts, so that the direction and angle of the telescopic direction wheel (355) can be changed when the telescopic direction wheel (355) rolls on the spiral blade, thereby achieving the purpose of self-adaptation. The telescopic direction wheel (355) and the swing rod (354) can be raised or lowered by the internal spring; the telescopic direction wheel (355) and the blade fixing wheel (353) on the processing device (35) are clamped at the top of the spiral blade of the mixing drum through the roller, so that the telescopic direction wheel (355) and the blade fixing wheel (353) can roll along the top of the spiral blade of the mixing drum, thereby allowing the coolant nozzle (356) and the heating device (358) to perform heat treatment at the top of the spiral blade of the mixing drum;

[0036] When heat treating the blade, the residence time of the heating device (358) in the heating area at the top of the blade is longer than the time it takes to heat the area to complete austenitization; after the heat treatment is completed, the area moves to the bottom of the cooling liquid nozzle (356) as the mixing drum rotates, and cooling liquid is sprayed on the heated area to increase the cooling speed; the residence time of the heating device (358) in the heating area is determined by the rotation speed of the mixing drum; during the heat treatment process, the control device (2) controls the rotation speed of the mixing drum in real time by running a control program; the control device (2) adjusts the speed and number of rotations of the first stepper motor by running a control program to control the movement of the slide (313) and the spring piston cylinder (351) in the axial direction of the mixing drum; the flow rate of the cooling liquid is 2-5L / min; the temperature range of the heating device (358) is 820-1200°C;

[0037] S4, after the heat treatment is completed, the processing device (35) runs to the top of the spiral blade at the front conical end of the mixing drum through the slide (313), and the heat treatment of some spiral blades of the mixing drum is completed. The remaining spiral blades need to be processed and the above steps are repeated.

Claims

1. A self-following heat treatment device for blades in a mixing drum, comprising a mixing drum device, a control device, and a heating and cooling device; The mixing drum device includes a mixing drum; the mixing drum is subjected to a rotational force to form a rotary motion with the axial direction as the rotation axis, and the speed of the rotary motion is adjusted by a control device; The control device includes a microcomputer system and flow sensors and solenoid valves installed in the coolant pipeline and the oxygen and acetylene gas pipelines. The collected gas flow data is converted into the heating temperature and compared with the target heat treatment temperature, thereby controlling the opening of the solenoid valve to adjust the gas flow in the gas pipeline. The speed sensor installed on the first stepper motor sends the collected speed data to the control device, which compares the collected speed with the target speed generated by the control program and adjusts the rotation speed of the mixing drum in real time. The heating and cooling device includes a guide rail device, a water tank, a power slide, a gas cylinder, and a processing device; the guide rail device includes a guide rail landing frame, a guide rail fixing seat, and a guide rail; the power slide includes a slide and a first stepper motor; the processing device includes a spring piston cylinder, a universal cover, a blade fixing wheel, a swing rod, a telescopic direction wheel, a coolant nozzle, a clamping ear, and a heating device; the coolant nozzle and the heating device are both fixed to the telescopic direction wheel through the clamping ear, and the clamping ear can adjust the tightness of the coolant nozzle and the heating device on the telescopic direction wheel by the number of rotations of the bolt, thereby adjusting the angle of the coolant nozzle and the heating device, so that the coolant nozzle and the heating device can adapt to the blade during the heat treatment process. The blade changes in the curvature of the blade at different parts of the mixing drum; the swing arm and the universal cover are movably connected by bolts, the telescopic direction wheel is hollow inside and has a spring, the swing arm extends into the telescopic direction wheel and is close to the spring; the blade fixing wheel is fixed in the groove of the universal cover, and a telescopic direction wheel is installed in front and behind the blade fixing wheel respectively, and the rollers of the three are clamped together at the top of the spiral blade, the heating device is fixed on the front telescopic direction wheel, and the coolant nozzle is fixed on the rear telescopic direction wheel; the first stepper motor is installed on the slide by screws to drive the slide to move linearly on the guide rail; the spring piston cylinder is fixed to the slide through the groove, and the slide moves linearly while driving the movement of the processing device.

2. The self-following heat treatment device for blades in a mixing drum according to claim 1, characterized in that: The swing arm and the universal cover are movably connected by bolts, so that the telescopic direction wheel can swing in a direction and angle change when rolling on the spiral blade, thereby achieving the purpose of self-adaptation. The telescopic direction wheel and the swing arm can rise or fall through the internal spring.

3. The self-following heat treatment device for blades in a mixing drum according to claim 1, characterized in that: The blade fixing wheel is fixed in the groove of the universal cover, and the blade fixing wheel can be replaced through the groove to realize the heat treatment process of different spiral blades.

4. The self-following heat treatment device for blades in a mixing drum according to claim 1, characterized in that: The first stepper motor is mounted on the slide by screws and is used to drive the slide to move in translation on the guide rail; the spring piston cylinder is fixed to the slide by a groove, and the slide moves in translation and drives the processing device to move at the same time.

5. The self-following heat treatment device for blades in a mixing drum according to claim 1, characterized in that: A telescopic direction wheel is respectively installed in front and behind the blade fixing wheel. When the slide performs axial translation and rotational motion of the mixing drum, the rollers of the three are clamped together at the top of the spiral blade and roll along the top of the spiral blade. The heating device is fixed to the front telescopic direction wheel, and the coolant nozzle is fixed to the rear telescopic direction wheel. The coolant nozzle and the heating device follow the top trajectory of the mixing drum blade through the telescopic direction wheel.

6. The self-following heat treatment device for blades in a mixing drum according to claim 1, characterized in that: When the blades are heat treated, the residence time of the heating device in the heating area is greater than the time required to heat the area to complete austenitization; after the heat treatment is completed, the area moves to the bottom of the coolant nozzle as the mixing drum rotates, and coolant is sprayed on the heated area to increase the cooling rate; the residence time of the heating device in the heating area is determined by the rotation speed of the mixing drum; during the heat treatment process, the control device controls the rotation speed of the mixing drum by running a control program; the control device adjusts the speed and number of rotations of the first stepper motor by running the control program to control the movement of the slide and the spring piston cylinder in the axial direction of the mixing drum.

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