Safe lifting equipment for PP (polypropylene) plate production

Abstract

The invention relates to the technical field of hoisting equipment, in particular to safe hoisting equipment for PP plate production. According to the technical scheme, the device comprises a cross beam, a first sliding way fixedly installed on the cross beam, a second sliding way installed on the first sliding way, a base plate installed on the second sliding way in a sliding mode and two sets of guiding devices fixedly installed on the base plate, and electric hoists are fixedly installed on the guiding devices. The two sets of guiding devices are fixedly connected and perpendicular to each other, and a damping mechanism is installed on the sliding rail mechanism. When the electric hoist is not perpendicular to a plate, pulling force borne by the electric hoist is decomposed into force parallel to the axis of the supporting rod in direction, the connecting plate can move along the axis of the supporting rod, the inclined steel cable can be moved to a vertical state, and the steel cable is prevented from directly pulling the plate to a floating position in the inclined state; and the plates are prevented from shaking, losing balance and sliding off.

Description

Technical Field

[0001] The invention relates to the technical field of lifting equipment, and in particular to a safe lifting equipment used for the production of PP plates. Background Art

[0002] PP board, also known as polypropylene board, is a board made of polypropylene material. Polypropylene is widely used in various fields such as packaging, construction, automobile manufacturing, electronic products, etc. due to its excellent physical properties and chemical stability, as well as its characteristics of light weight, high strength, corrosion resistance, waterproofness, heat insulation, and electrical insulation. Especially in the field of construction, PP boards are often used as materials such as heat insulation, waterproofing, sound insulation, and decoration. In the batch processing and production of PP boards, the stacked boards need to be hoisted and transported. Generally, hoisting equipment is used to lift the boards from the stack and transport them to the production line for the next step of processing, such as gluing, hot pressing bonding, etc.

[0003] A trolley is usually set up in the production workshop (a trolley, also known as a trolley or a bridge crane, is a mechanical device used to transport heavy objects vertically. It is mainly composed of a crane body, an electrical system, a traveling mechanism and a lifting device). When hoisting the stacked plates, the plates are placed on a base with multiple traction ropes on the base. The hoisting operation can be carried out by connecting the hooks on the trolley with the traction ropes, but the position of the trolley is generally adjusted by a person through a controller. Therefore, when hoisting, the sling on the trolley must first be moved above the plate. The operator visually determines whether the sling has moved directly above the plate. Therefore, the sling cannot be accurately moved directly above the plate. When the sling pulls the plate to rise, and the center of gravity of the sling and the plate are not on the same vertical line, the floating plate will shake in the tilted direction. Shaking may cause the plate to lose balance, causing it to slip, tip over or collide, which may not only damage the plate, but also cause harm to the operator and other equipment. Summary of the invention

[0004] The purpose of the present invention is to address the problem mentioned in the background technology that when a sling pulls a plate to rise and the center of gravity of the sling and the plate are not in the same vertical line, the floating plate will shake in an inclined direction. The present invention proposes a lifting device for PP plate production that can automatically move the sling to directly above the plate when the center of gravity of the sling and the plate are not in the same vertical line, so that the center of gravity of the plate and the sling are in the same vertical line.

[0005] The technical solution of the present invention: a safe lifting device for PP sheet production, comprising a crossbeam, a first slideway fixedly mounted on the crossbeam, a second slideway mounted on the first slideway, a base plate slidably mounted on the second slideway, and further comprising: Two groups of guide devices are fixedly mounted on the base plate, and electric hoists are fixedly mounted on the guide devices. The two groups of guide devices are fixedly connected to each other and are perpendicular to each other. One group of guide devices includes two slide rail mechanisms, and a damping mechanism is installed on the slide rail mechanism. The electric hoist applies a pulling force to the PP plate, and the guide device drives the electric hoist to move to the top of the PP plate under the reverse force applied by the PP plate to the electric hoist, and the damping mechanism limits the moving speed of the electric hoist on the guide device.

[0006] Optionally, the slide rail mechanism includes a support rod, mounting grooves provided on both sides of the support rod, and multiple guide wheels rotatably installed in the mounting grooves, a connecting plate is fixedly installed on the multiple guide wheels located on the same side, one of the support rods on one group of the guide devices is fixedly connected to the base plate, one of the support rods on one group of the guide devices is fixedly installed on the connecting plate on another group of the guide devices, the axes of the two support rods on the same group of the guide devices are parallel to each other, and the axes of the support rods on the two groups of the guide devices are perpendicular to each other.

[0007] Optionally, the damping mechanism includes a speed limiting block fixedly mounted on a connecting plate, a pressure rod fixedly mounted on both sides of the speed limiting block, an oil cylinder fixedly mounted on both sides of the connecting plate, and two three-way joints fixedly mounted on a supporting rod, the three-way joints corresponding to the oil cylinders one by one, oil pipes are connected between the corresponding three-way joints and the oil cylinders, two conversion boxes are fixedly mounted on the supporting rod, both ends of the conversion box are fixedly mounted with a one-way valve, a thick pipe and a reducing joint are fixedly mounted on the three-way joint, a thin pipe is fixedly mounted on the reducing joint, the thick pipe and the thin pipe on the same three-way joint are respectively connected to the one-way valves on the two conversion boxes, the two one-way valves on the same conversion box are respectively fixedly connected to the thick pipe and the thin pipe, and a speed limiting component is installed in the conversion box.

[0008] Optionally, the inner diameter of the thick tube is greater than the inner diameter of the thin tube, and the inner diameter of the thick tube is equal to the inner diameter of the oil pipe.

[0009] Optionally, the speed limiting assembly includes an installation box fixedly installed in the conversion box, and a guide cover fixedly installed on both sides of the installation box, the two guide covers are respectively connected to the one-way valves on both sides of the conversion box, a cylindrical hole is provided inside the installation box, a first transmission rod is rotatably installed in the cylindrical hole, a turbine blade is fixedly installed on the first transmission rod, a first bevel gear is fixedly installed on the first transmission rod, a second transmission rod is rotatably installed in the cylindrical hole, a second bevel gear is fixedly installed on the second transmission rod, the first bevel gear and the second bevel gear are meshed with each other, the second transmission rod passes through one side of the installation box and the conversion box and extends to the outside of the conversion box, a first friction plate is fixedly installed on the second transmission rod, the first friction plate is located on the outside of the conversion box, a fixed seat is fixedly installed on the conversion box, a telescopic rod and a pressure spring are fixedly installed on the fixed seat, a second friction plate is fixedly installed on the telescopic rod, the pressure spring is located between the second friction plate and the fixed seat, and the second friction plate is against the first friction plate.

[0010] Optionally, a reset mechanism is fixedly mounted on the support rod, and the reset mechanism drives the connecting plate to slide to the middle of the support rod.

[0011] Optionally, the reset mechanism includes a push rod motor fixedly mounted on both ends of the support rod, and a push block fixedly mounted on an output shaft of the push rod motor, and the push block is located inside the mounting groove.

[0012] Optionally, a support plate is fixedly mounted on one group of four connecting plates on the guide device, and the electric hoist is fixedly mounted on the support plate.

[0013] Optionally, the axes of the first slide and the second slide are perpendicular to each other, a driving plate is slidably mounted on the first slide, the second slide is fixedly connected to the driving plate, and a first driving device is fixedly mounted on the first slide for driving the second slide to move along the axial direction of the first slide.

[0014] Optionally, a second driving device is fixedly mounted on the second slideway, and the second driving device drives the substrate to move along the axial direction of the second slideway.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: According to the present invention, when the electric hoist is not perpendicular to the plate, the electric hoist will be subjected to a force directed toward the plate. Because the force is not perpendicular to the horizontal plane, the pulling force exerted on the electric hoist can be decomposed into a force in a direction parallel to the axis of the support rod, so that the connecting plate can be moved along the axis of the support rod. By setting two groups of mutually perpendicular support rods, the electric hoist can be freely moved within the plane formed by the two groups of support rods, and then the inclined steel cable can be moved to a vertical state, preventing the steel cable from directly pulling the plate to a floating position in a tilted state, preventing the plate from shaking, preventing the plate from losing balance, causing problems such as sliding, tipping or collision, preventing damage to the PP plate or other hoisted products, and avoiding injuries to operators and other equipment.

[0016] Furthermore, when the support plate moves, it will drive the pressure rod to move, and the hydraulic oil to move. Through the reduction of the cross-sectional area of ​​the pipeline, the resistance of the turbine blades to the flow of the hydraulic oil, and the relative rotation between the first friction plate and the second friction plate, the kinetic energy of the hydraulic oil can be further converted into heat energy, which will lead to a reduction in the overall kinetic energy of the hydraulic oil. The kinetic energy of the movement of the hydraulic oil comes from the kinetic energy of the movement of the support plate, which can reduce the moving speed of the support plate, thereby preventing the support plate from moving too fast when a gap appears between the plate and the ground during the hoisting of the plate, and avoiding the sudden relaxation of the steel cable, which will cause the base to suddenly lose its tension and cause the base to fall down, thereby preventing the staff from being pinched and reducing the possibility of the plate tipping over. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of an embodiment of the present invention is given Figure 1 ; Figure 2 A schematic diagram of the structure of an embodiment of the present invention is given Figure 2 ; Figure 3 A schematic diagram of the structure of an embodiment of the present invention is given Figure 3 ; Figure 4 A schematic diagram of the positions of two sets of guide devices of the present invention is given; Figure 5 A schematic structural diagram of two sets of guide devices of the present invention is given; Figure 6 for Figure 5 A partial enlarged view of the middle A; Figure 7 The structural schematic diagram of the slide rail mechanism of the present invention is given as follows: Figure 1 ; Figure 8 The structural schematic diagram of the slide rail mechanism of the present invention is given as follows: Figure 2 ; Fig. 9 The structural schematic diagram of the slide rail mechanism of the present invention is given as follows: Figure 3; Fig.10 for Figure 7 A partial enlarged view of point B in the middle; Fig.11 for Figure 8 A partial enlarged view of point C in the middle; Fig.12 A structural schematic diagram of the installation box of the present invention is provided; Fig.13 A schematic structural diagram of the turbine blade of the present invention is given.

[0018] Reference numerals: 1, crossbeam; 101, first slideway; 102, drive plate; 103, second slideway; 104, base plate; 2, support rod; 201, mounting groove; 202, guide wheel; 203, connecting plate; 3, speed limit block; 301, pressure rod; 302, oil cylinder; 303, three-way joint; 304, oil pipe; 305, conversion box; 306, one-way valve; 307, thick pipe; 308, reducer; 309, thin pipe Tube; 310, installation box; 311, deflector; 312, cylindrical hole; 313, first transmission rod; 314, turbine blade; 315, first bevel gear; 316, second transmission rod; 317, second bevel gear; 318, first friction plate; 319, fixing seat; 320, telescopic rod; 321, pressure spring; 322, second friction plate; 4, push rod motor; 401, push block; 5, support plate; 6, electric hoist. DETAILED DESCRIPTION

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

[0020] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0021] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] like Figure 1-Figure 3 As shown, the safety lifting equipment for PP sheet production proposed by the present invention includes a crossbeam 1, a first slide 101 fixedly mounted on the crossbeam 1, a second slide 103 mounted on the first slide 101, and a base plate 104 slidably mounted on the second slide 103. The crossbeam 1 is mounted on the walls on both sides of the factory, or multiple support beams are built in the factory, and the crossbeam 1 is mounted on the support beam, and the crossbeam 1 is kept at a certain height from the ground. The specific height can be adjusted according to the production needs of the factory. The axes of the first slide 101 and the second slide 103 are perpendicular to each other, and a driving plate 102 is slidably mounted on the first slide 101. The second slide 103 is fixedly connected to the driving plate 102. A first driving device that drives the second slide 103 to move along the axial direction of the first slide 101 is fixedly mounted on the first slide 101. A second driving device is fixedly mounted on the second slide 103, and the second driving device drives the base plate 104 to move along the axial direction of the second slide 103. (The first driving device and the second driving device are prior art, so they are not drawn in the figure and will not be described again) The second slide 103 is driven by the first driving device to move along the second slide 103, and the substrate 104 is made to slide along the second slide 103 by the second driving mechanism, so that the substrate 104 can move freely in the plane area formed by the two beams 1, and the substrate 104 can be moved to any position in the plane area formed by the two beams 1.

[0025] like Figure 2-Figure 5 and Figure 7-Figure 9As shown, it also includes two groups of guide devices fixedly installed on the base plate 104, on which an electric hoist 6 is fixedly installed, the two groups of guide devices are fixedly connected to each other and are perpendicular to each other, one group of guide devices includes two slide rail mechanisms, the electric hoist 6 applies a pulling force to the PP plate, and the guide device drives the electric hoist 6 to move to the top of the PP plate under the reverse force applied by the PP plate to the electric hoist 6, and a steel cable is provided on the electric hoist 6, on which a hook is fixedly installed, when the plate of the PP plate is lifted, the electric hoist 6 extends the steel cable to move the steel cable downward and connect the hook with the plate, at this time the steel cable is in a relaxed state, and then the electric hoist 6 winds the steel cable to gradually put the steel cable in a taut state and apply an upward pulling force to the plate, when the steel cable is in a vertical state at this time, the pulling force generated by the steel cable will be perpendicular to the horizontal plane, and then the pulling force at this time cannot be decomposed into a pulling force parallel to the horizontal plane, which will directly pull up the plate, and the plate will not shake. When the steel cable is in an inclined state, according to Newton's third law, that is, the principle that "the action force and reaction force are equal, opposite in direction, and act on the same straight line", the electric hoist 6 will also be subjected to a force directed toward the plate, and the force is not perpendicular to the horizontal plane. At this time, the pulling force on the electric hoist 6 will be decomposed into components parallel to the horizontal direction, thereby driving the electric hoist 6 to move along the guide device parallel to the horizontal direction. When the steel cable on the electric hoist 6 moves to a vertical position, the steel cable that continues to be wound will drive the plate to rise, thereby preventing the plate from shaking, preventing the plate from losing balance, causing problems such as sliding, tipping or collision, preventing damage to the plate, and avoiding injuries to operators and other equipment.

[0026] Among them, the sliding rail mechanism includes a support rod 2, a mounting groove 201 arranged on both sides of the support rod 2, and a plurality of guide wheels 202 rollingly installed in the mounting groove 201, and a connecting plate 203 is fixedly installed on the plurality of guide wheels 202 located on the same side, wherein the support rods 2 on one group of guide devices are fixedly connected to the base plate 104, wherein the support rods 2 on one group of guide devices are fixedly installed on the connecting plate 203 on another group of guide devices, and the axes of the two support rods 2 on the same group of guide devices are parallel to each other, and the axes of the support rods 2 on the two groups of guide devices are perpendicular to each other. When the electric hoist 6 applies tension to the plate, the reverse force it receives will be decomposed into a force parallel to the axis of the support rod 2. Under the guidance of the guide wheel 202 and the mounting groove 201, the connecting plate 203 can be moved along the axis of the support rod 2. By setting two groups of mutually perpendicular support rods 2, the electric hoist 6 can be freely moved within the plane formed by the two groups of support rods 2, and then the inclined steel cable can be moved to a vertical state, preventing the steel cable from directly pulling the plate material to a floating position in an inclined state, and preventing the plate from shaking. A support plate 5 is fixedly installed on the four connecting plates 203 on one group of guide devices, and the electric hoist 6 is fixedly installed on the support plate 5. When the electric hoist 6 continues to wind the steel cable, the length of the inclined steel cable will decrease when it moves to a vertical position, and the reduced length will be wound up by the electric hoist 6, and a part of the pulling force applied to the plate will be decomposed into the power for the support plate 5 to move on the guide device, so that before the steel cable moves to a vertical state, there is no force to pull up the plate, thereby ensuring that the plate will not shake when being pulled up.

[0027] like Figure 6 and Figure 10-13As shown, a damping mechanism is installed on the slide rail mechanism, and the damping mechanism limits the moving speed of the electric hoist 6 on the guide device. When the electric hoist 6 lifts the plate, and the steel cable is in a taut state and tilted, the pulling force is decomposed into a force that drives the support plate 5 to move. When the support plate 5 moves, it will continue to move due to inertia, rather than moving gradually as the steel cable contracts. When the support plate 5 moves on the support rod 2, it will drive the steel cable to gradually approach the vertical position, and the steel cable will change from a tensioned state to a relaxed state from tilting to vertical, and the electric hoist 6 will continue to tighten the steel cable, so that the steel cable will not be in a relaxed state. However, when the electric hoist 6 suddenly stops or fails, the electric hoist 6 tightens the steel cable. The speed is less than the relaxation speed of the support plate 5 on the steel cable, which will cause the steel cable to no longer be taut. At this time, the steel cable will not generate tension on the plate. When in a taut state and the inclined steel cable, it will exert lateral force on the plate. Four traction ropes are generally connected to the base. At this time, the four traction ropes are unevenly stressed, and the side of the base with greater force has a stronger upward trend, which may cause a gap between one side of the base where the plate is placed and the ground. The sudden relaxation of the steel cable will cause the base to suddenly lose its tension, causing the base to fall downward, which may easily injure the staff and may cause the plate to topple over. Limiting the moving speed of the support plate 5 by the damping mechanism will prevent this from happening.

[0028] The damping mechanism includes a speed limit block 3 fixedly mounted on the connecting plate 203, a pressure rod 301 fixedly mounted on both sides of the speed limit block 3, an oil cylinder 302 fixedly mounted on both sides of the connecting plate 203, and two three-way joints 303 fixedly mounted on the supporting rod 2. The three-way joints 303 correspond to the oil cylinder 302 one by one, and an oil pipe 304 is connected between the three-way joints and the oil cylinder 302 corresponding to each other. Two conversion boxes 305 are fixedly mounted on the supporting rod 2, and both ends of the conversion box 305 are fixedly mounted with a one-way valve 306. The one-way valves 306 on the two conversion boxes 305 are in opposite directions, and the one-way valves 306 on the same conversion box 305 are in the same direction. A thick pipe 307 and a reducer 308 are fixedly mounted on the three-way joint 303, and a thin pipe 309 is fixedly mounted on the reducer 308. The one-way valve 306 allows the liquid to move from the thin pipe 309 to the direction of the thick pipe 307. The oil cylinder 302, the three-way joint 303, the oil pipe 304, the thick pipe 307, the reducer 308, the thin pipe 309, the conversion box 305 and the one-way valve 306 are filled with hydraulic oil. When the support plate 5 moves, it will drive the connecting plate 203 to move, thereby driving the speed limit block 3 that moves with the connecting plate 203 to move, and the moving speed limit block 3 will drive the pressure rod 301 to move, and the pressure rod 301 is slidably installed in the oil cylinder 302, and then the moving pressure rod 301 will squeeze the hydraulic oil in the oil cylinder 302, and the squeezed hydraulic oil will enter the conversion box 305 through the three-way joint 303 and the thin pipe 309. The inner diameter of the thick pipe 307 is larger than the inner diameter of the thin pipe 309, and the inner diameter of the thick pipe 307 is equal to the inner diameter of the oil pipe 304, which is located on the same three-way joint 303. The thick pipe 307 and the thin pipe 309 are connected to the one-way valves 306 on the two conversion boxes 305, respectively. The two one-way valves 306 on the same conversion box 305 are fixedly connected to the thick pipe 307 and the thin pipe 309, respectively. The hydraulic oil entering the thin pipe 309 through the oil pipe must increase the liquid flow rate to meet the law of conservation of mass due to the reduction of the pipe cross-sectional area, which leads to the acceleration of the flow rate of the hydraulic oil entering the thin pipe 309 from the oil pipe 304. However, the volume of liquid flowing through the thin pipe 309 per unit time is less than that of the thick pipe 307. Therefore, even if the flow rate increases, the reduction in flow rate will lead to a decrease in the overall kinetic energy of the hydraulic oil. Therefore, it can play a certain damping role, preventing the hydraulic oil in the oil cylinder 302 from flowing out quickly, and then preventing the support plate 5 from moving too fast, and the hydraulic oil passing through the conversion box 305 will enter the inside of the other oil cylinder 302, so that the hydraulic oil circulates in the two oil cylinders 302.

[0029] In this embodiment, a speed limiting assembly is installed in the conversion box 305. Specifically, the speed limiting assembly includes an installation box 310 fixedly installed in the conversion box 305, and air deflectors 311 fixedly installed on both sides of the installation box 310. The two air deflectors 311 are respectively connected to the one-way valves 306 on both sides of the conversion box 305. A cylindrical hole 312 is provided inside the installation box 310. A first transmission rod 313 is rotatably installed in the cylindrical hole 312. A turbine blade 314 is fixedly installed on the first transmission rod 313. A first bevel gear 315 is fixedly installed on the first transmission rod 313. A second transmission rod 316 is rotatably installed in the cylindrical hole 312. A second bevel gear 317 is fixedly installed on the second transmission rod 316. The first bevel gear 315 is fixedly installed on the first transmission rod 313. 15 is meshed with the second bevel gear 317, the second transmission rod 316 passes through the installation box 310 and one side of the conversion box 305 and extends to the outside of the conversion box 305, the second transmission rod 316 is fixedly mounted with a first friction plate 318, the first friction plate 318 is located on the outside of the conversion box 305, the conversion box 305 is fixedly mounted with a fixing seat 319, the fixing seat 319 is fixedly mounted with a telescopic rod 320 and a pressure spring 321, the telescopic rod 320 is fixedly mounted with a second friction plate 322, the pressure spring 321 is located between the second friction plate 322 and the fixing seat 319, and the second friction plate 322 abuts against the first friction plate 318. The hydraulic oil entering the conversion box 305 will enter the cylindrical hole 312 inside the installation box 310, so that the hydraulic oil will contact the turbine blade 314, and the hydraulic oil passing through the turbine blade 314 will drive the turbine blade 314 to rotate, so that the kinetic energy of the hydraulic oil is converted into the kinetic energy of the turbine blade 314, and the kinetic energy of the movement of the hydraulic oil is the kinetic energy of the movement of the self-supporting plate 5, which can further reduce the moving speed of the support plate 5, and the rotation of the turbine blade 314 drives the first bevel gear 315 and the second bevel gear 317 to rotate synchronously, so that the second transmission The movable rod 316 drives the first friction plate 318 to rotate, and the friction force between the first friction plate 318 and the second friction plate 322 provides resistance to the rotation of the turbine blade 314, which can prevent the turbine blade 314 from rotating quickly, and cause the turbine blade 314 to produce resistance to the flow of hydraulic oil, further reducing the flow rate of the hydraulic oil, and through the relative rotation between the first friction plate 318 and the second friction plate 322, the kinetic energy of the hydraulic oil can be further converted into heat energy, which can further weaken the kinetic energy of the support plate 5, thereby preventing the support plate 5 from moving too fast.

[0030] After the electric hoist 6 lifts the plate to a certain height and starts to slide along the first slide 101 or the second slide 103, the suddenly moving second slide 103 or base plate 104 will drive the plate to move. At this time, the plate will maintain its original static state under the action of inertia, and will shake when the plate accelerates at the beginning of its movement along the first slide 101 or the second slide 103 and stops at the end of its movement. At this time, the steel cable will tilt and pull the support plate 5 towards the direction close to the plate, so that the support plate 5 moves to the top of the plate to prevent the plate from shaking continuously. During the process, the plate to be swung will convert the kinetic energy of the swing into the kinetic energy of the movement of the support plate 5, and the kinetic energy of the movement of the support plate 5 will be converted into the kinetic energy of the movement of the hydraulic oil. The reduction of the cross-sectional area of ​​the pipeline, the resistance of the turbine blade 314 to the flow of the hydraulic oil, and the relative rotation between the first friction plate 318 and the second friction plate 322 can further convert the kinetic energy of the hydraulic oil into heat energy, which will lead to the reduction and conversion of the overall kinetic energy of the hydraulic oil, thereby preventing the plate from shaking when accelerating at the beginning of the movement along the first slide 101 or the second slide 103 and stopping at the end of the movement.

[0031] like Figure 8 As shown, a reset mechanism is fixedly installed on the support rod 2, and the reset mechanism drives the connecting plate 203 to slide to the middle of the support rod 2. The reset mechanism includes a push rod motor 4 fixedly installed at both ends of the support rod 2, and a push block 401 fixedly installed on the output shaft of the push rod motor 4, and the push block 401 is located inside the installation groove 201. Before the lifting operation, the push rod motor 4 pushes the guide wheel 202 to move, thereby driving the connecting plate 203 to move, so that the connecting plate 203 moves to the middle of the support rod 2, so that the connecting plate 203 can move in a large range on both sides of the support rod 2.

[0032] The working principle of this embodiment is as follows: a steel cable is provided on the electric hoist 6, and a hook is fixedly installed on the steel cable. When the PP plate is lifted, the hook is connected to the plate, and the steel cable is in a relaxed state. Then the electric hoist 6 winds the steel cable, so that the steel cable is gradually in a taut state, and applies an upward pulling force to the plate. At this time, if the steel cable is in an inclined state, the electric hoist 6 will be subjected to a force directed toward the plate, because the force is not perpendicular to the horizontal plane, so that the pulling force on the electric hoist 6 can be decomposed into a force parallel to the axis of the support rod 2, and the guide wheel 20 2 and the installation groove 201, the connecting plate 203 can be moved along the axis of the support rod 2. By setting two groups of mutually perpendicular support rods 2, the electric hoist 6 can be freely moved within the plane formed by the two groups of support rods 2, so that the inclined steel cable can be moved to a vertical state, preventing the steel cable from directly pulling the plate to a floating position in the inclined state, preventing the plate from shaking, preventing the plate from losing balance, causing problems such as sliding, tipping or collision, preventing damage to the plate, and avoiding injuries to operators and other equipment.

[0033] When the support plate 5 moves, the pressure rod 301 will be driven to move, and the moving pressure rod 301 will squeeze the hydraulic oil in the oil cylinder 302. The squeezed hydraulic oil will enter the capillary 309 through the oil pipe, which will reduce the overall kinetic energy of the hydraulic oil due to the reduction of the pipe cross-sectional area. Therefore, it can play a certain damping role. The hydraulic oil entering the conversion box 305 will drive the turbine blades 314 to rotate, so that the kinetic energy of the hydraulic oil is converted into the kinetic energy of the turbine blades 314, and the kinetic energy of the movement of the hydraulic oil is derived from the kinetic energy of the movement of the support plate 5, which can further reduce the moving speed of the support plate 5. The rotation of the turbine blades 314 drives the first friction plate 318 to rotate, and the friction between the first friction plate 318 and the second friction plate 322 provides resistance to the rotation of the turbine blades 314, which can prevent the turbine blades 314 from rotating quickly, so that the turbine blades 314 produce resistance to the flow of hydraulic oil, further reducing the flow rate of the hydraulic oil, and the relative rotation between the first friction plate 318 and the second friction plate 322 can further convert the kinetic energy of the hydraulic oil into heat energy, which can further weaken the kinetic energy of the support plate 5, thereby preventing the support plate 5 from moving too fast, and avoiding the sudden relaxation of the steel cable causing the base to suddenly lose tension, causing the base to fall downward, preventing the staff from being pinched, and reducing the possibility of the plate tipping.

[0034] The above specific embodiments are only several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A safety lifting device for PP sheet production, comprising a crossbeam (1), a first slideway (101) fixedly mounted on the crossbeam (1), a second slideway (103) mounted on the first slideway (101), and a base plate (104) slidably mounted on the second slideway (103), characterized in that: Also includes: Two groups of guide devices are fixedly mounted on a base plate (104), an electric hoist (6) being fixedly mounted on the guide devices, the two groups of guide devices being fixedly connected to each other and perpendicular to each other, one group of guide devices comprising two slide rail mechanisms, a damping mechanism being mounted on the slide rail mechanism, the electric hoist (6) applying a pulling force to the PP plate, the guide device drives the electric hoist (6) to move to just above the PP plate under the reverse force applied by the PP plate to the electric hoist (6), and the damping mechanism limits the moving speed of the electric hoist (6) on the guide device.

2. The safety lifting equipment for PP sheet production according to claim 1 is characterized in that: The slide rail mechanism comprises a support rod (2), mounting grooves (201) arranged on both sides of the support rod (2), and a plurality of guide wheels (202) rollingly mounted in the mounting grooves (201); a connecting plate (203) is fixedly mounted on the plurality of guide wheels (202) located on the same side; the support rods (2) on one group of the guide devices are fixedly connected to the base plate (104); the support rods (2) on one group of the guide devices are fixedly mounted on the connecting plate (203) on another group of the guide devices; the axes of the two support rods (2) on the same group of the guide devices are parallel to each other, and the axes of the support rods (2) on the two groups of the guide devices are perpendicular to each other.

3. The safety lifting equipment for PP sheet production according to claim 2 is characterized in that: The damping mechanism comprises a speed limiting block (3) fixedly mounted on a connecting plate (203), a compression rod (301) fixedly mounted on both sides of the speed limiting block (3), an oil cylinder (302) fixedly mounted on both sides of the connecting plate (203), and two three-way joints (303) fixedly mounted on a supporting rod (2), wherein the three-way joints (303) correspond to the oil cylinders (302) in a one-to-one manner, and oil pipes (304) are connected between the corresponding three-way joints and the oil cylinders (302), and two conversion boxes (305) are fixedly mounted on the supporting rod (2), and both ends of the conversion box (305) are fixedly mounted. A one-way valve (306) is fixedly installed on the three-way joint (303); a thick tube (307) and a reducing joint (308) are fixedly installed on the three-way joint (303); a thin tube (309) is fixedly installed on the reducing joint (308); the thick tube (307) and the thin tube (309) on the same three-way joint (303) are respectively connected to the one-way valves (306) on two conversion boxes (305); the two one-way valves (306) on the same conversion box (305) are respectively fixedly connected to the thick tube (307) and the thin tube (309); and a speed limiting component is installed in the conversion box (305).

4. The safety lifting equipment for PP sheet production according to claim 3 is characterized in that: The inner diameter of the thick tube (307) is greater than the inner diameter of the thin tube (309), and the inner diameter of the thick tube 307 is equal to the inner diameter of the oil tube 304.

5. The safety lifting equipment for PP sheet production according to claim 4 is characterized in that: The speed limiting assembly comprises an installation box (310) fixedly installed in a conversion box (305), and air guide covers (311) fixedly installed on both sides of the installation box (310), the two air guide covers (311) being respectively connected to the one-way valves (306) on both sides of the conversion box (305), a cylindrical hole (312) being provided inside the installation box (310), a first transmission rod (313) being rotatably installed in the cylindrical hole (312), a turbine blade (314) being fixedly installed on the first transmission rod (313), a first bevel gear (315) being fixedly installed on the first transmission rod (313), a second transmission rod (316) being rotatably installed in the cylindrical hole (312), a second bevel gear (317) being fixedly installed on the second transmission rod (316), and the first bevel gear (315) being The second transmission rod (316) is meshed with the second bevel gear (317). The second transmission rod (316) passes through one side of the installation box (310) and the conversion box (305) and extends to the outside of the conversion box (305). The first friction plate (318) is fixedly mounted on the second transmission rod (316). The first friction plate (318) is located on the outside of the conversion box (305). The conversion box (305) is fixedly mounted with a fixing seat (319). A telescopic rod (320) and a pressure spring (321) are fixedly mounted on the fixing seat (319). A second friction plate (322) is fixedly mounted on the telescopic rod (320). The pressure spring (321) is located between the second friction plate (322) and the fixing seat (319). The second friction plate (322) abuts against the first friction plate (318).

6. The safety lifting equipment for PP sheet production according to claim 5, characterized in that: A reset mechanism is fixedly mounted on the support rod (2), and the reset mechanism drives the connecting plate (203) to slide to the middle of the support rod (2).

7. The safety lifting equipment for PP sheet production according to claim 6, characterized in that: The reset mechanism comprises a push rod motor (4) fixedly mounted on both ends of the support rod (2), and a push block (401) fixedly mounted on the output shaft of the push rod motor (4), wherein the push block (401) is located inside the mounting groove (201).

8. The safety lifting equipment for PP sheet production according to claim 7, characterized in that: A support plate (5) is fixedly mounted on one group of four connecting plates (203) on the guide device, and the electric hoist (6) is fixedly mounted on the support plate (5).

9. The safety lifting equipment for PP sheet production according to claim 8, characterized in that: The axes of the first slideway (101) and the second slideway (103) are perpendicular to each other; a driving plate (102) is slidably mounted on the first slideway (101); the second slideway (103) is fixedly connected to the driving plate (102); and a first driving device for driving the second slideway (103) to move along the axial direction of the first slideway (101) is fixedly mounted on the first slideway (101).

10. The safety lifting equipment for PP sheet production according to claim 9, characterized in that: A second driving device is fixedly mounted on the second slideway (103), and the second driving device drives the substrate (104) to move along the axial direction of the second slideway (103).

Images