Electric screw jack for lifting a building

Abstract

The application relates to the technical field of jacks, and discloses an electric screw jack for house lifting, which comprises a jack mechanism, a waterproof electric box and a control module. The electric screw jack for house lifting is provided with a level and a pressure sensor, four groups of electric push rods are connected with the level, a PLC controller automatically calculates and executes a leveling action, base horizontal adjustment is quickly completed, the efficiency of manual leveling is improved, and human errors are completely eliminated. An absolute value encoder feeds back a positive and negative motor rotation angle in real time, precise transmission of a ball screw is combined, lifting displacement is convenient to control in precision, the strict requirements of historical building repair are met, a pressure sensor monitors the stress state of each roof in real time, a PLC controller dynamically adjusts the rotation speed of the positive and negative motors through an equalization mode, structure damage caused by local overload during multi-machine lifting is avoided, and any roof is controlled through a touch screen, so that complex working conditions such as local repair and deviation correction are adapted.

Description

Technical Field

[0001] This application relates to the field of jack technology, specifically an electric screw jack for roof lifting. Background Technology

[0002] In building maintenance and renovation projects, roof lifting technology is a key means to solve foundation settlement and structural reinforcement. Traditional lifting methods rely on hydraulic jacks or manual screw jacks, which suffer from problems such as unstable lifting force, poor synchronization, and high manual labor intensity. In recent years, with the acceleration of urbanization, the demand for existing building renovation has surged, and the market demand for high-precision, automated lifting equipment has become increasingly urgent. Lifting systems integrating pressure sensors and PLC control have emerged abroad, but they are expensive and complex to maintain. In China, separate jacks under 200 tons are still the mainstream, and in large public building lifting projects, dozens of pieces of equipment often need to work together, resulting in low construction efficiency and significant safety hazards.

[0003] In building jacking operations, traditional jacks have two major technical bottlenecks. Existing equipment requires operators to repeatedly measure and manually adjust the base level, which is inefficient and difficult to guarantee accuracy. Hydraulic or mechanical jacks lack a real-time feedback mechanism for pressure and displacement, and uneven load can easily cause structural damage when multiple jacks are used for jacking. Therefore, an electric screw jack for roof jacking is provided. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides an electric screw jack for roof lifting, which improves working accuracy and avoids structural damage caused by uneven load when multiple jacks are used for lifting.

[0005] To achieve the above objectives, this application provides the following technical solution: an electric screw jack for roof lifting, comprising a jack mechanism, a waterproof electrical box, and a control module. The jack mechanism is provided in multiple sets, and each jack mechanism package contains a forward and reverse motor, a level, an electric push rod, and a pressure sensor. The control module is integrated into the waterproof electrical box and includes a PLC controller, a touch screen, and an absolute encoder. The absolute encoder is coaxially connected to the output shaft of the forward and reverse motors, providing real-time feedback of the motor rotation angle to the PLC controller. The PLC controller is electrically connected to the level, the electric push rod, and the pressure sensor.

[0006] The above scheme, through the installation of a level and pressure sensor, links four sets of electric push rods with the level, and the PLC controller automatically calculates and executes the leveling action to quickly complete the horizontal adjustment of the base. Compared with manual leveling, the efficiency is improved and human error is completely eliminated. The absolute encoder provides real-time feedback on the rotation angle of the forward and reverse motors, which, combined with the precision transmission of the ball screw, enables precise control of the lifting displacement, meeting the stringent requirements of historical building renovation. The pressure sensor monitors the stress state of each roof plate in real time, and the PLC controller dynamically adjusts the speed of the forward and reverse motors through the equalization mode to ensure that structural damage caused by local overload is avoided when multiple machines are lifted. Any roof plate can be controlled individually through the touch screen, adapting to complex working conditions such as local repair and correction.

[0007] Furthermore, the jack mechanism includes a first connecting plate, a motor housing is fixedly connected to the right side of the first connecting plate, the forward and reverse motors are fixedly connected inside the motor housing, a planetary reducer is provided at the output end of the forward and reverse motors via a coupling, a ball screw is provided at the left end of the planetary reducer, a through hole is provided inside the first connecting plate and the ball screw passes through the through hole, a second connecting plate is provided at the left end of the first connecting plate, the second connecting plate and the ball screw are threadedly connected via a threaded hole, movable rods are movably connected to both the upper and lower ends of the first and second connecting plates, a total of four sets of movable rods are provided and symmetrically arranged at the upper and lower ends of the first and second connecting plates, the upper two sets of movable rods are movably connected to a top plate near one end, and a pressure sensor is provided inside the top plate.

[0008] With the above scheme, the forward and reverse motors drive the ball screw to rotate after the planetary reducer increases the torque. The rotational motion of the ball screw is converted into the linear displacement of the second connecting plate, which pushes the top plate to rise vertically through the hinge structure of four sets of movable rods.

[0009] Furthermore, the two sets of movable rods at the lower end are movably connected to a top plate support plate near one end. The level is set on the upper surface of the support plate, and a base is set on the lower surface of the support plate. A connecting block is fixedly connected to the side of the base. The electric push rod passes through the connecting block, and a base is set at the lower end of the electric push rod. There are four sets of electric push rods and bases, which are arranged in a rectangular shape on the side of the base.

[0010] With the above solution, the level on the support plate detects the three-dimensional tilt angle of the base in real time and sends the data to the PLC controller. The PLC controller calculates the height compensation amount of the four corners based on the tilt angle and drives the electric push rods at the corresponding positions to extend and retract until the base is level.

[0011] Furthermore, an anti-slip layer is provided on the lower surface of the base.

[0012] The above solution provides additional friction to prevent lateral slippage during the lifting process.

[0013] Furthermore, the base surface has threaded holes, and bolts are internally threaded.

[0014] Using the above method, the four sets of bases are anchored to the ground with bolts.

[0015] Furthermore, the PLC controller executes a multi-machine collaborative algorithm: Synchronous mode: All top blocks rise at the same speed, and the PLC controller compensates for displacement deviation in real time based on absolute encoder data; Balanced mode: Based on the average value of the pressure sensors, the speed of each of the forward and reverse motors is automatically adjusted; Independent mode: The start, stop, and lifting direction of any top block can be controlled individually via the touch screen.

[0016] Through the above scheme, the PLC controller realizes multi-unit control in three modes: Synchronous mode: all forward and reverse motors receive the same speed command, and the lifting speed is consistent; the absolute encoder provides real-time feedback on the rotation angle of each forward and reverse motor, and the PLC calculates the displacement deviation for dynamic compensation; Balanced mode: the PLC controller reads data from all pressure sensors, decelerates the motor with high load and accelerates the motor with low load to ensure load balance when lifting multiple machines and avoid local overload of the structure; Independent mode: the target height or lifting direction of each jack mechanism can be set individually through the touch screen; the PLC controller controls the start and stop of each forward and reverse motor in a time-sharing manner, which is suitable for local repairs or asymmetrical lifting scenarios.

[0017] Furthermore, the absolute encoder is a multi-turn magnetic encoder.

[0018] The above scheme allows the multi-turn magnetic design of the absolute encoder to accurately record the rotation speed of the motor in both directions.

[0019] Furthermore, the electric push rod is driven by a DC geared motor.

[0020] With the above solution, the DC motor only consumes power when it is running and can be completely powered off when it is stationary, resulting in significant energy savings.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects: This type of electric screw jack for roof lifting uses a level and pressure sensor. Four sets of electric push rods are linked to the level, and the PLC controller automatically calculates and executes the leveling action to quickly complete the leveling of the base. Compared with manual leveling, the efficiency is improved and human error is completely eliminated. The absolute encoder provides real-time feedback on the rotation angle of the forward and reverse motors. Combined with the precision transmission of the ball screw, the lifting displacement can be controlled with precision, meeting the stringent requirements of historical building renovation. The pressure sensor monitors the stress state of each roof plate in real time. The PLC controller dynamically adjusts the speed of the forward and reverse motors through the equalization mode to ensure that structural damage caused by local overload is avoided when multiple machines are lifting. Any roof plate can be controlled individually through the touch screen, adapting to complex working conditions such as local repair and correction. Attached Figure Description

[0022] Figure 1 This is a system diagram showing the overall connections of this application; Figure 2 This is a frontal three-dimensional sectional view of the jack mechanism of this application; Figure 3 This is a three-dimensional structural diagram of the jack mechanism in this application; Figure 4 This is a schematic diagram of the overall framework of this application; Figure 5 This is the logic diagram of the multi-machine collaborative control in this application.

[0023] In the picture: 1. Jack mechanism; 101. First connecting plate; 102. Motor housing; 103. Forward and reverse motor; 104. Planetary reducer; 105. Ball screw; 106. Second connecting plate; 107. Movable rod; 108. Top plate; 109. Pressure sensor; 1010. Support plate; 1011. Base; 1012. Level; 1013. Connecting block; 1014. Electric push rod; 1015. Base; 1016. Bolt; 2. Waterproof electrical box; 3. Control module; 301. PLC controller; 302. Touch screen; 303. Absolute encoder. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Please see Figure 1 , Figure 4 and Figure 5This embodiment describes an electric screw jack for roof lifting, comprising a jack mechanism 1, a waterproof electrical box 2, and a control module 3. The jack mechanism 1 has multiple sets, and each jack mechanism 1 contains a forward / reverse motor 103, a level 1012, an electric push rod 1014, and a pressure sensor 109. The control module 3 is integrated into the waterproof electrical box 2 and includes a PLC controller 301, a touch screen 302, and an absolute encoder 303. The absolute encoder 303 is coaxially connected to the output shaft of the forward / reverse motor 103, providing real-time feedback of the motor's rotation angle to the PLC controller 301. The PLC controller 301 is electrically connected to the level 1012, the electric push rod 1014, and the pressure sensor 109. The control module 3 is configured with the level 1012 and the pressure sensor 109. 9. Four sets of electric push rods 1014 are linked with the level instrument 1012. The PLC controller 301 automatically calculates and executes the leveling action to quickly complete the horizontal adjustment of the base 1015. Compared with manual leveling, the efficiency is improved and human error is completely eliminated. The absolute encoder 303 provides real-time feedback on the rotation angle of the forward and reverse motors 103. Combined with the precision transmission of the ball screw 105, the lifting displacement is easily controlled with high precision to meet the stringent requirements of historical building renovation. The pressure sensor 109 monitors the stress state of each top plate 108 in real time. The PLC controller 301 dynamically adjusts the speed of the forward and reverse motors 103 through the equalization mode to ensure that structural damage caused by local overload is avoided when multiple machines are lifted. Any top plate 108 can be controlled individually through the touch screen 302 to adapt to complex working conditions such as local repair and correction.

[0026] Please see Figure 2 and Figure 3The jack mechanism 1 includes a first connecting plate 101. A motor housing 102 is fixedly connected to the right side of the first connecting plate 101. A forward and reverse motor 103 is fixedly connected inside the motor housing 102. A planetary reducer 104 is installed at the output end of the forward and reverse motor 103 via a coupling. A ball screw 105 is installed at the left end of the planetary reducer 104. A through hole is opened inside the first connecting plate 101, and the ball screw 105 passes through the through hole. A second connecting plate 106 is installed at the left end of the first connecting plate 101. 106 and ball screw 105 are connected by a threaded hole. Movable rods 107 are movably connected to both the upper and lower ends of the first connecting plate 101 and the second connecting plate 106. There are four sets of movable rods 107, symmetrically arranged at the upper and lower ends of the first connecting plate 101 and the second connecting plate 106. The two upper sets of movable rods 107 are movably connected to a top plate 108 near one end, and a pressure sensor 109 is located inside the top plate 108. The two lower sets of movable rods 107 are movably connected to a support plate of the top plate 108 near one end. 1010. A level 1012 is mounted on the upper surface of a support plate 1010. A base 1011 is mounted on the lower surface of the support plate 1010. A connecting block 1013 is fixedly connected to the side of the base 1011. An electric push rod 1014 passes through the connecting block 1013. A base 1015 is mounted at the lower end of the electric push rod 1014. Four sets of electric push rods 1014 and bases 1015 are provided and are arranged in a rectangular shape on the side of the base 1011. A forward and reverse motor 103 is driven by a planetary reducer 104 after torque amplification. The ball screw 105 rotates, and the rotational motion of the ball screw 105 is converted into the linear displacement of the second connecting plate 106. Through the hinge structure of the four sets of movable rods 107, the top plate 108 is pushed to rise vertically. The level 1012 on the support plate 1010 detects the three-dimensional tilt angle of the base 1011 in real time and sends the data to the PLC controller 301. The PLC controller 301 calculates the height compensation of the four corners according to the tilt angle and drives the electric push rods 1014 at the corresponding positions to extend and retract until the base 1011 is horizontal.

[0027] Please see Figure 2 and Figure 3 The lower surface of the base 1015 is provided with an anti-slip layer, and the surface of the base 1015 has threaded holes, with bolts 1016 connected internally by threads. The PLC controller 301 executes a multi-machine collaborative algorithm. Synchronous mode: All top blocks are lifted at the same speed, and the PLC controller 301 compensates for displacement deviation in real time based on the data from the absolute encoder 303; Balanced mode: Based on the average value of pressure sensor 109, automatically adjust the speed of each forward and reverse motor 103; Independent Mode: The start, stop, and lifting direction of any single top block can be individually controlled via the touchscreen 302. The absolute encoder 303 is a multi-turn magnetic encoder, and the electric push rod 1014 is driven by a DC geared motor. The anti-slip layer provides additional friction to prevent side slippage during lifting. Four sets of bases 1015 are anchored to the ground via bolts 1016. The PLC controller 301 achieves multi-unit control through three modes: Synchronous Mode: All forward and reverse motors 103 receive the same speed command, resulting in consistent lifting speeds; The absolute encoder 303 provides real-time feedback on the rotation angle of each forward and reverse motor 103, and the PLC calculates displacement deviations for dynamic compensation. Balanced mode: The PLC controller 301 reads data from all pressure sensors 109, slowing down those with high loads and accelerating those with low loads to ensure balanced load during multi-machine lifting and avoid local overload of the structure; Independent mode: The target height or lifting direction of each jack mechanism 1 can be set individually via the touch screen 302; The PLC controller 301 controls the start and stop of each forward and reverse motor 103 in a time-sharing manner, which is suitable for local repairs or asymmetrical lifting scenarios. The multi-turn magnetic design of the absolute encoder 303 can accurately record the rotation of the forward and reverse motors 103. The DC motor only consumes power when it is in operation and can be completely powered off when it is stationary, resulting in significant energy saving.

[0028] In this embodiment, by setting up a level instrument 1012 and a pressure sensor 109, four sets of electric push rods 1014 are linked with the level instrument 1012. The PLC controller 301 automatically calculates and executes the leveling action, quickly completing the horizontal adjustment of the base 1015. Compared with manual leveling, the efficiency is improved and human error is completely eliminated. The absolute encoder 303 provides real-time feedback on the rotation angle of the forward and reverse motors 103. Combined with the precision transmission of the ball screw 105, the lifting displacement is easily controlled with high precision, meeting the stringent requirements of historical building renovation. The pressure sensor 109 monitors the stress state of each top plate 108 in real time. The PLC controller 301 dynamically adjusts the speed of the forward and reverse motors 103 through the equalization mode to ensure that structural damage caused by local overload is avoided when multiple machines are lifted. Any top plate 108 can be controlled individually through the touch screen 302, adapting to complex working conditions such as local repair and correction.

[0029] The working principle of the above embodiment is as follows: the level 1012 on the support plate 1010 detects the three-dimensional tilt angle of the base 1011 in real time and sends the data to the PLC controller 301. The PLC controller 301 calculates the height compensation amount of the four corners according to the tilt angle and drives the electric push rods 1014 at the corresponding positions to extend and retract until the base 1011 is horizontal. After leveling, the four sets of bases 1015 are anchored to the ground by bolts 1016. The anti-slip layer provides additional friction to prevent lateral slippage during the lifting process. The forward and reverse motors 103 drive the ball screw 105 to rotate after the planetary reducer 104 increases the torque. The rotational motion of the ball screw 105 is converted into the linear displacement of the second connecting plate 106, which pushes the top plate 108 to rise vertically through the hinge structure of the four sets of movable rods 107. The pressure sensor 109 in the top plate 108 monitors the lifting load in real time, and the data is fed back to the PLC controller 301 for dynamic adjustment of the lifting strategy. The PLC controller 301 realizes multi-unit control through three modes: synchronous mode: all forward and reverse motors 103 receive the same speed command, and the lifting speed is consistent; the absolute encoder 303 provides real-time feedback on the rotation angle of each forward and reverse motor 103, and the PLC calculates the displacement deviation for dynamic compensation; the equalization mode... In the standard mode, the PLC controller 301 reads data from all pressure sensors 109, decelerating those with high loads and accelerating those with low loads to ensure balanced load during multi-machine lifting and avoid local overload of the structure. In the independent mode, the target height or lifting direction of each jack mechanism 1 can be set individually via the touch screen 302. The PLC controller 301 controls the start and stop of each forward and reverse motor 103 in a time-sharing manner, which is suitable for local repairs or asymmetrical lifting scenarios. The multi-turn magnetic design of the absolute encoder 303 can accurately record the rotation of the forward and reverse motors 103. Combined with the lead of the ball screw 105, the lifting displacement is calculated. When the pressure sensor 109 detects that the load exceeds the rated value, the PLC controller 301 immediately cuts off the power supply of the corresponding forward and reverse motor 103 and triggers mechanical self-locking. If the communication of a certain device is interrupted or the displacement exceeds the tolerance, the system automatically marks it as a fault state and compensates the lifting force through adjacent devices.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0031] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electric screw jack for roof lifting, comprising a jack mechanism (1), a waterproof electrical box (2), and a control module (3), characterized in that: The jack mechanism (1) is provided in multiple sets. The jack mechanism (1) is provided with a forward and reverse motor (103), a level (1012), an electric push rod (1014) and a pressure sensor (109). The control module (3) is integrated in a waterproof electrical box (2) and includes a PLC controller (301), a touch screen (302) and an absolute encoder (303). The absolute encoder (303) is coaxially connected to the output shaft of the forward and reverse motor (103) and provides real-time feedback on the rotation angle of the forward and reverse motor (103) to the PLC controller (301). The PLC controller (301) is electrically connected to the level (1012), the electric push rod (1014) and the pressure sensor (109).

2. The electric screw jack for roof lifting according to claim 1, characterized in that: The jack mechanism (1) includes a first connecting plate (101), a motor housing (102) is fixedly connected to the right side of the first connecting plate (101), a forward and reverse motor (103) is fixedly connected inside the motor housing (102), a planetary reducer (104) is provided at the output end of the forward and reverse motor (103) through a coupling, a ball screw (105) is provided at the left end of the planetary reducer (104), a through hole is provided inside the first connecting plate (101), and the ball screw (105) passes through the through hole. A second connecting plate (106) is provided, and the second connecting plate (106) and the ball screw (105) are connected by a threaded hole. Movable rods (107) are movably connected to both the upper and lower ends of the first connecting plate (101) and the second connecting plate (106). There are four sets of movable rods (107), which are symmetrically arranged at the upper and lower ends of the first connecting plate (101) and the second connecting plate (106). The two sets of movable rods (107) at the upper end are movably connected to a top plate (108) near one end, and the pressure sensor (109) is located inside the top plate (108).

3. The electric screw jack for roof lifting according to claim 2, characterized in that: The two sets of movable rods (107) at the lower end are movably connected to the top plate (108) support plate (1010) near one end. The level (1012) is set on the upper surface of the support plate (1010). The lower surface of the support plate (1010) is provided with a base (1011). The side of the base (1011) is fixedly connected with a connecting block (1013). The electric push rod (1014) passes through the inside of the connecting block (1013). The lower end of the electric push rod (1014) is provided with a base (1015). There are four sets of electric push rods (1014) and bases (1015), which are arranged in a rectangular shape on the side of the base (1011).

4. An electric screw jack for roof lifting according to claim 3, characterized in that: The lower surface of the base (1015) is provided with an anti-slip layer.

5. An electric screw jack for roof lifting according to claim 3, characterized in that: The base (1015) has a threaded hole on its surface and a bolt (1016) is connected to it internally by a thread.

6. An electric screw jack for roof lifting according to claim 1, characterized in that: The PLC controller (301) executes a multi-machine collaborative algorithm: Synchronous mode: All top blocks are lifted at the same speed, and the PLC controller (301) compensates for displacement deviation in real time based on the data from the absolute encoder (303); Balanced mode: Based on the average value of the pressure sensor (109), the rotation speed of each of the forward and reverse motors (103) is automatically adjusted; Independent mode: The start, stop and lifting direction of any top block can be controlled independently via the touch screen (302).

7. An electric screw jack for roof lifting according to claim 1, characterized in that: The absolute encoder (303) is a multi-turn magnetic encoder.

8. An electric screw jack for roof lifting according to claim 1, characterized in that: The electric push rod (1014) is driven by a DC geared motor.

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