A construction lifting platform and control method thereof

Abstract

The present invention discloses a construction lifting platform. A lifting platform that moves up and down along two vertically arranged lifting rails is installed between the lifting rails. A brake slot is provided on the inner side of the lifting rails. Braking mechanisms are fixed on both sides of the lower surface of the lifting platform. The braking mechanisms include a brake plate and a damping telescopic rod. The limit plate is bent toward the brake slot. A controller is fixed to the lifting platform, and the output end of the controller is electrically connected to the two damping telescopic rods. The construction lifting platform of the present invention and its use method, by adding a deceleration brush to the brake slot in conjunction with the damping telescopic rod and a gravity sensor, can control the damping degree of the damping telescopic rod when the lifting platform loses weight. This allows the brake plate to fully contact the deceleration brush before it engages the brake slot, thereby reducing the speed of the lifting platform and, in turn, reducing the impact speed of the brake plate and the brake slot.

Description

Technical Field

[0001] The present invention relates to the technical field of construction platforms, in particular to a lifting platform for construction and a method for using the same. Background Art

[0002] In the field of construction, various types of scaffolding are widely used, but they generally have many problems, such as the use of too many materials, long erection time, operating platform height that is not convenient for construction operations, construction materials that are not convenient for transportation, and many safety hazards in construction. These problems are particularly prominent in high-rise and super-high-rise projects. The use of electric hanging baskets in engineering construction also has problems such as unstable operating frames, short frame lengths, and greater risks.

[0003] Traditional construction lifts utilize a pawl and brake groove system (elevators also employ a similar locking mechanism). When the platform loses weight, the pawl extends and engages the brake groove, causing the lift to brake urgently, preventing casualties from falling. However, when using a pawl and brake groove system, if the pawl's action is slightly delayed, the platform will accelerate after a short period of gravity acceleration. This can cause the pawl to strike the brake groove, breaking the pawl and preventing the platform from braking. This can lead to the risk of the platform falling. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to realize a lifting platform for construction and a method of using the same, which solves the problem that the anti-fall structure of the traditional construction platform has no deceleration buffer.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a lifting platform for construction, a lifting platform that moves up and down along the lifting track is installed between two vertically arranged lifting tracks, a brake slot is provided on the inner side of the lifting track, and a braking mechanism is fixed on both sides of the lower surface of the lifting platform, the braking mechanism includes a brake plate and a damping telescopic rod, the brake plate is composed of a connecting plate and a limit plate to form an L-shaped structure, one end of the connecting plate is hinged to the outside of the lifting platform through a first hinge part, one end of the damping telescopic rod is hinged to the inside of the lifting platform through a second hinge part, the other end of the damping telescopic rod is hinged to the other end of the connecting plate through a third hinge part, the limit plate is bent toward the brake slot, and a controller is fixed on the lifting platform, and the output end of the controller is electrically connected to the two damping telescopic rods.

[0006] A deceleration brush is fixed on the surface of the brake slot. A strip groove arranged obliquely downward is provided at each set distance of the brake slot. The width of the strip groove is greater than the thickness of the limiting plate.

[0007] There are two lifting platforms, each of which is provided with a controller and a braking mechanism. The two lifting platforms are fixed on a cable, the upper end of the cable is fixed on a winch, and the winch is driven to rotate by a lifting motor.

[0008] The control box has a controller inside its shell, as well as a gravity sensor, a signal storage and transmission module, and a battery connected to the controller. The controller is connected to the damping telescopic rod through a signal line. The damping telescopic rod is provided with an electronic control component that drives it to extend. The signal storage and transmission module is used to store data and send alarm signals to the server.

[0009] The gravity sensor is provided with a sealed shell, which has a channel that can move up and down. A pressure sensor is fixed to the bottom of the shell, and a moving block is placed above the pressure sensor. Gas is filled between the moving block and the pressure sensor. The pressure sensor sensing component faces upward to sense the pressure of the air pressed down by the moving block.

[0010] The gravity sensor is provided with a sealed shell, which has a channel that moves up and down. A tension sensor is fixed to the bottom of the shell, and a moving block is placed above the tension sensor. The moving block and the tension sensor are connected by a spring. The tension sensor sensing component faces upward to sense the pressure of the moving block on the spring.

[0011] Control method of construction lifting platform:

[0012] The controller presets the danger value A and the danger value B;

[0013] When the parameter of the gravity sensor reaches the dangerous value A, the damping telescopic rod is controlled to extend until the brake plate contacts the deceleration brush. When the parameter of the gravity sensor reaches the dangerous value B, the damping telescopic rod is controlled to extend until the brake plate is embedded in the brake slot.

[0014] The risk value A is equal to 0.8 to 0.99 times the gravity value of the moving block, and the risk value B is less than or equal to 0.79 times the gravity value of the moving block.

[0015] When the gravity sensor parameter reaches the dangerous value A, if the gravity sensor returns to the normal value, the damping telescopic rod will be controlled to retract to the initial state. When the gravity sensor parameter reaches the dangerous value B, the signal storage and transmission module will sound an alarm.

[0016] The controller controls the extension of the damping telescopic rod in a manner of controlling the damping telescopic rod to reduce the damping coefficient, or directly controlling the extension length of the damping telescopic rod.

[0017] The construction lifting platform of the present invention and the method of using the same, by adding a deceleration brush on the brake groove in combination with a damping telescopic rod and a gravity sensor, can control the damping degree of the damping telescopic rod when the lifting platform loses weight, so that the brake plate can fully contact with the deceleration brush before it is stuck in the brake groove, thereby reducing the speed of the lifting platform and further reducing the impact speed of the brake plate and the brake groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following is a brief description of the contents and marks in each figure in the specification of the present invention:

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 for Figure 1 A local enlarged view of point A in FIG;

[0021] Figure 3 The brake plate state diagram when the dangerous value A is reached but the dangerous value B is not reached;

[0022] Figure 4 The brake plate status diagram when the dangerous value B is reached;

[0023] Figure 5 This is the control box structure diagram;

[0024] Figure 6 This is a cross-sectional view of the control box (using an air pressure sensor);

[0025] Figure 7 This is a cross-sectional view of the control box (using a tension sensor);

[0026] The marks in the above figure are:

[0027] 1. Lifting track; 11. Brake slot; 12. Speed ​​reduction brush;

[0028] 2. Lifting platform; 21. Track;

[0029] 3. Brake plate; 31. First hinge; 32. Second hinge; 33. Damping telescopic rod;

[0030] 4. Cable;

[0031] 5. Control box; 51. Housing; 52. Gravity sensor; 521. Shell; 522. Moving block; 523. Air pressure sensor; 524. Tension sensor; 525. Spring; 53. Controller; 54. Signal storage and transmission module; 55. Battery. DETAILED DESCRIPTION

[0032] Below, with reference to the accompanying drawings, through the description of the embodiments, the specific implementation methods of the present invention, such as the shape, structure, relative positions and connection relationships of the various components involved, the functions and working principles of the various components, the manufacturing process and operating methods, etc., are further explained in detail to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0033] A construction lifting platform includes a lifting track 1, a lifting platform 2 is provided on the lifting track 1, a control box 5 is provided at the bottom of the lifting platform 2, a brake plate 3 is hingedly connected to the bottom of the lifting platform 2, a brake slot 11 is provided on the inner side of the lifting track 1, and a deceleration brush 12 is provided on the brake slot 11. The brake plate 3 is an L-shaped plate, and a damping telescopic rod 33 is hinged at its bending point. The other end of the damping telescopic rod 33 is hinged to the bottom of the lifting platform 2, and the damping telescopic rod 33 is electrically connected to the control box 5.

[0034] The control box 5 includes a housing 51 , in which a gravity sensor 52 and a controller 53 are disposed. The gravity sensor 52 is electrically connected to the controller 53 , and the controller 53 is electrically connected to the damping telescopic rod 33 .

[0035] like Figure 6 As shown, gravity sensor 52 includes a housing 521, with an air pressure sensor 523 disposed at the bottom of housing 521. A movable block 522 is disposed above air pressure sensor 523. Gas is filled between movable block 522 and air pressure sensor 523, and air pressure sensor 523 is electrically connected to controller 53. To increase the sensitivity of the sensor, the pressure of the gas at room temperature is equal to the weight of movable block 522.

[0036] The sensor can take another form, such as Figure 7 As shown, the gravity sensor 52 includes a shell 521 , a tension sensor 524 is provided at the bottom of the shell 521 , the top of the tension sensor 524 is connected to a moving block 522 via a spring 525 , and the tension sensor 524 is electrically connected to the controller 53 .

[0037] In order to provide the controller 53 with a stable power supply, a battery 55 and a signal storage and transmission module 54 are provided in the housing 51 . Both the battery 55 and the signal storage and transmission module 54 are electrically connected to the controller 53 .

[0038] An additional lifting platform 2 is added to the same lifting track 1, with two lifting platforms 2 installed on the lifting track 1. When driven by a cable 4, the lower lifting platform 2 will be slightly larger than the upper one to facilitate the connection of the cable 4. When driven by a travel motor, the above-mentioned connection of the cable 4 does not need to be considered.

[0039] Adding one more lifting platform 2 can increase the working range to a certain extent and improve the construction work efficiency. At the same time, when the upper lifting platform 2 falls, the lower lifting platform 2 can provide support and protection or transfer trapped people.

[0040] In order to adjust the extension angle of the damping telescopic rod 33, as shown in FIG. Figure 2-4 As shown, a track 21 is provided at the bottom of the lifting platform 2, and a damping telescopic rod 33 is provided on the track 21 near the second hinge portion 32 of the lifting platform 2. When the lifting track 1 is not arranged vertically, the brake plate 3 receives a downward component of force in the inclined direction, which can easily cause the brake plate 3 to malfunction. In this case, the distance between the second hinge portion 32 of the damping telescopic rod 33 near the lifting platform 2 and the first hinge portion 31 can be increased to prevent the brake plate 3 from accidentally hitting the deceleration brush 12 or the brake slot 11.

[0041] Example 1 of a method for using a construction lifting platform includes the following steps:

[0042] Step 1: Set the danger value A and the danger value B in the controller 53, where the danger value A is equal to 0.8 to 1 times the gravity value of the moving block 522, and the danger value B is less than or equal to 0.79 times the gravity value of the moving block 522, and start the lifting motor to rotate forward, so that the lifting platform 2 moves upward on the lifting track 1;

[0043] Step 2: During the upward acceleration of the lifting platform 2, the moving block 522 is in an overweight state. The air pressure sensor 523 receives a signal that is greater than the gravity of the moving block 522. At this time, it sends a signal to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to increase the damping coefficient, so that the brake plate 3 does not swing.

[0044] Step 3: When the lifting platform 2 accelerates to a uniform speed, the moving block 522 is in a normal state, and the air pressure sensor 523 receives a signal equal to the gravity of the moving block 522. At this time, a signal is sent to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to increase the damping coefficient, so that the brake plate 3 does not swing;

[0045] Step 4: When the lifting platform 2 is raised to the construction height, turn off the lifting motor and proceed with construction;

[0046] Step 5: After the construction is completed, start the lifting motor to reverse and move the lifting platform 2 downward on the lifting track 1;

[0047] Step 6: During the downward acceleration of the lifting platform 2, the moving block 522 is in a weightless state. The air pressure sensor 523 receives a signal that is less than the gravity of the moving block 522. If the signal value is less than the danger value A, the air pressure sensor 523 sends a signal to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to increase the damping coefficient, so that the brake plate 3 does not swing.

[0048] Step 7: During the downward acceleration of the lifting platform 2, the moving block 522 is in a weightless state. The air pressure sensor 523 receives a signal that is less than the gravity of the moving block 522. If the signal value is less than or equal to the danger value A, the pressure sensor 523 sends a signal to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to reduce the damping coefficient, causing the brake plate 3 to swing slightly downward, so that the end of the brake plate 3 contacts the deceleration brush 12. Figure 3 ;

[0049] Step 8: During the downward acceleration of the lifting platform 2, the moving block 522 is in a weightless state. The air pressure sensor 523 receives a signal that is less than the gravity of the moving block 522. If the signal value is less than or equal to the danger value B, the pressure sensor 523 sends a signal to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to further reduce the damping coefficient, so that the brake plate 3 continues to swing downward, so that the end of the brake plate 3 can be locked in the brake slot 11. Figure 4 .

[0050] The danger value A may also be equal to 0.79 to 0.99 times the gravity value on which the moving block 522 is subjected.

[0051] Another control method embodiment 2 of the present invention includes the following steps:

[0052] Step 1: Set the danger value A and the danger value B in the controller 53, where the danger value A is equal to 0.8 to 1 times the gravity value of the moving block 522, and the danger value B is less than or equal to 0.79 times the gravity value of the moving block 522, and start the lifting motor to rotate forward, so that the lifting platform 2 moves upward on the lifting track 1;

[0053] Step 2: During the upward acceleration of the lifting platform 2, the moving block 522 is in an overweight state. The air pressure sensor 523 receives a signal that is greater than the gravity of the moving block 522. At this time, it sends a signal to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to increase the damping coefficient, so that the brake plate 3 does not swing.

[0054] Step 3: When the lifting platform 2 accelerates to a uniform speed, the moving block 522 is in a normal state, and the air pressure sensor 523 receives a signal equal to the gravity of the moving block 522. At this time, a signal is sent to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to increase the damping coefficient, so that the brake plate 3 does not swing;

[0055] Step 4: When the lifting platform 2 is raised to the construction height, turn off the lifting motor and proceed with construction;

[0056] Step 5: After the construction is completed, start the lifting motor to reverse and move the lifting platform 2 downward on the lifting track 1;

[0057] Step 6: During the downward acceleration of the lifting platform 2, the moving block 522 is in a weightless state. The air pressure sensor 523 receives a signal that is less than the gravity of the moving block 522. If the signal value is less than the danger value A, the air pressure sensor 523 sends a signal to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to increase the damping coefficient, so that the brake plate 3 does not swing.

[0058] Step 7: During the downward acceleration of the lifting platform 2, the moving block 522 is in a weightless state. The air pressure sensor 523 receives a signal that is less than the gravity of the moving block 522. If the signal value is less than or equal to the danger value A, the pressure sensor 523 sends a signal to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to extend, causing the brake plate 3 to swing downward, so that the end of the brake plate 3 contacts the deceleration brush 12. Figure 3 ;

[0059] Step 8: During the downward acceleration of the lifting platform 2, the moving block 522 is in a weightless state. The air pressure sensor 523 receives a signal that is less than the gravity of the moving block 522. If the signal value is less than or equal to the danger value B, the pressure sensor 523 sends a signal to the controller 53, causing the controller 53 to control the damping telescopic rod 33 to continue to extend, causing the brake plate 3 to continue to swing downward, so that the end of the brake plate 3 can be locked in the brake slot 11. Figure 4 .

[0060] The difference between Example 1 and Example 2 lies in the different control methods for the damping telescopic rod 33. Example 1 adjusts the damping coefficient and then allows the brake plate 3 to automatically adjust its swing angle in a weightless state. Example 2 directly controls the extension length of the damping telescopic rod 33. In comparison, the control method of Example 1 is more accurate when reaching danger value A but not danger value B. It also improves the reaction speed when moving from danger value A to danger value B, because the degree of weightlessness can be used to automatically adjust the swing angle of the brake plate 3, thereby controlling the distance between the brake plate 3 and the deceleration brush 12. The higher the degree of weightlessness, the greater the swing angle of the brake plate 3 toward the deceleration brush 12, thereby significantly improving the braking effect of the deceleration brush 12 on the brake plate 3. Before reaching danger value B, the swing angle of the brake plate 3 is already close to the brake slot 11, so when danger value B is reached, the brake plate 3 can be quickly swung into the brake slot 11.

[0061] The second embodiment has lower requirements on the installation process of the brake plate 3 and the manufacturing accuracy of the first hinge portion 31 .

[0062] To sum up, the construction lifting platform and its use method are characterized by adding a deceleration brush on the brake groove in combination with a damping telescopic rod and a gravity sensor, which can control the damping degree of the damping telescopic rod when the lifting platform loses weight, so that the brake plate can fully contact with the deceleration brush before it is stuck in the brake groove, thereby reducing the speed of the lifting platform and further reducing the impact speed of the brake plate and the brake groove.

[0063] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A construction lifting platform, wherein a lifting platform is installed between two vertical lifting rails and moves up and down along the lifting rails, characterized in that: A brake slot is provided on the inner side of the lifting track, and a brake mechanism is fixed on both sides of the lower surface of the lifting platform, the brake mechanism includes a brake plate and a damping telescopic rod, the brake plate is composed of a connecting plate and a limit plate to form an L-shaped structure, one end of the connecting plate is hinged to the outer side of the lifting platform through a first hinge part, one end of the damping telescopic rod is hinged to the inner side of the lifting platform through a second hinge part, and the other end of the damping telescopic rod is hinged to the other end of the connecting plate through a third hinge part, the limit plate is bent toward the brake slot, and a controller is fixed on the lifting platform, and the output end of the controller is electrically connected to the two damping telescopic rods; A deceleration brush is fixed on the surface of the brake slot, and a strip groove arranged obliquely downward is provided at a set interval of the brake slot, and the width of the strip groove is greater than the thickness of the limit plate; A control box is provided at the bottom of the lifting platform. A controller, a gravity sensor, a signal storage and transmission module, and a battery connected to the controller are provided in the housing of the control box. The controller is connected to the damping telescopic rod via a signal line. The damping telescopic rod is provided with an electric control component for driving the extension thereof. The signal storage and transmission module is used to store data and send alarm signals to a server. The controller presets a danger value A and a danger value B; When the parameter of the gravity sensor reaches the dangerous value A, the damping telescopic rod is controlled to extend until the brake plate contacts the deceleration brush. When the parameter of the gravity sensor reaches the dangerous value B, the damping telescopic rod is controlled to extend until the brake plate is embedded in the brake slot.

2. The construction lifting platform according to claim 1, characterized in that: There are two lifting platforms, each of which is provided with a controller and a braking mechanism. The two lifting platforms are fixed on a cable, the upper end of the cable is fixed on a winch, and the winch is driven to rotate by a lifting motor.

3. The construction lifting platform according to claim 2, characterized in that: The gravity sensor is provided with a sealed shell, which has a channel that can move up and down. A pressure sensor is fixed to the bottom of the shell, and a moving block is placed above the pressure sensor. Gas is filled between the moving block and the pressure sensor. The pressure sensor sensing component faces upward to sense the pressure of the air pressed down by the moving block.

4. The construction lifting platform according to claim 2, characterized in that: The gravity sensor is provided with a sealed shell, which has a channel that moves up and down. A tension sensor is fixed to the bottom of the shell, and a moving block is placed above the tension sensor. The moving block and the tension sensor are connected by a spring. The tension sensor sensing component faces upward to sense the pressure of the moving block on the spring.

5. The control method for a construction lifting platform according to any one of claims 1 to 4, characterized in that: The controller presets the danger value A and the danger value B; When the parameter of the gravity sensor reaches the dangerous value A, the damping telescopic rod is controlled to extend until the brake plate contacts the deceleration brush. When the parameter of the gravity sensor reaches the dangerous value B, the damping telescopic rod is controlled to extend until the brake plate is embedded in the brake slot.

6. The control method for a construction lifting platform according to claim 5, characterized in that: The risk value A is equal to 0.8 to 0.99 times the gravity value on which the moving block is subjected, and the risk value B is less than or equal to 0.79 times the gravity value on which the moving block is subjected.

7. The control method for a construction lifting platform according to claim 6, characterized in that: When the gravity sensor parameter reaches the dangerous value A, if the gravity sensor returns to the normal value, the damping telescopic rod will be controlled to retract to the initial state. When the gravity sensor parameter reaches the dangerous value B, the signal storage and transmission module will sound an alarm.

8. The control method for a construction lifting platform according to claim 5, 6 or 7, characterized in that: The controller controls the extension of the damping telescopic rod in a manner of controlling the damping telescopic rod to reduce the damping coefficient, or directly controlling the extension length of the damping telescopic rod.

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