Safety protection device for hoisting machinery

Abstract

The utility model discloses a hoisting machinery safety protection device which comprises a guide rail installed at a high position, a crane trolley is installed on the guide rail, the hoisting machinery safety protection device further comprises a safety protection assembly, the safety protection assembly comprises a detection module and a protection module, the detection module comprises a pedestal, the pedestal is fixed to the bottom face of the crane trolley, and the protection module is fixed to the bottom face of the crane trolley. The steel wire rope of the crane trolley movably penetrates through the pedestal; a plurality of stress plates are arranged on the inner side of the pedestal, guide rods are fixed to the faces, away from each other, of the stress plates, the guide rods movably penetrate through the pedestal and are connected with first limiting nuts in a screwed mode, and spring bodies are arranged at the positions, between the pedestal and the stress plates, of the guide rods. A proximity switch is arranged on the stress plate; according to the safety protection device for the hoisting machinery, the hoisting machinery can be quickly braked when the hoisting rope swings greatly, meanwhile, a crane trolley can be assisted to tightly hold a guide rail, and the safety protection device is safer to use.

Description

Technical Field

[0001] The utility model specifically relates to a safety protection device for a hoisting machine, belonging to the technical field of hoisting machine components. Background Art

[0002] A hoisting machine refers to a multi-action machine that vertically lifts and horizontally transports heavy objects within a certain range, also known as an overhead crane, gantry crane, or crane; the working characteristic of a hoisting machine is intermittent movement, that is, in a working cycle, actions such as material taking, transporting, and unloading alternate. For the safety of the hoisting work of the hoisting machine, existing hoisting machines are equipped with various protection devices. For example, the Chinese patent authorization publication number: CN208700423U discloses a safety protection device for a hoisting machine, including a beam bridge, a sliding table, and an alarm box. By setting shock-absorbing cushions, this protection device can effectively reduce the impact force generated when the hoisting machine collides with a wall or other objects, and reduce the swinging amplitude of the hook to prevent damage to nearby personnel or equipment caused by the hook swinging too large. When the existing hoisting machine is hoisting, when there is a strong wind and the hoisting rope swings greatly, or when there is an abnormal collision of the hoisted object, the crane trolley is pulled by the hoisting rope, which is likely to cause the crane trolley to be strongly pulled, resulting in the walking wheels of the crane trolley deviating from the guide rail, resulting in jamming of the guide rail or deformation of the crane trolley. Summary of the Utility Model

[0003] To solve the above problems, the utility model proposes a safety protection device for a hoisting machine, which can quickly brake the hoisting machine when the hoisting rope swings greatly, and at the same time can assist the crane trolley to hold the guide rail tightly, making it safer to use.

[0004] The safety protection device for a hoisting machine of the utility model includes a guide rail installed at a high position, on which a crane trolley is installed, and further includes a safety protection component, and the safety protection component includes

[0005] a detection module, the detection module includes a pedestal, the pedestal is fixed to the bottom surface of the crane trolley and is arranged opposite to the wire winding and unwinding end of the crane trolley, and the steel wire rope of the crane trolley passes through the pedestal movably; a plurality of stress plates are arranged inside the pedestal, a guide rod is fixed on the surface of the stress plate away from each other, the guide rod passes through the pedestal movably and is screwed with a first limit nut, and a spring body is arranged between the pedestal and the stress plate on the guide rod; a proximity switch is arranged on the stress plate; the proximity switch is connected to the PLC of the crane trolley;

[0006] Protective module, the protective module includes a C-shaped seat, the C-shaped seat is fixed to the crane trolley, and the C-shaped seat is movably engaged with the top and bottom surfaces of the guide rail; an upper sliding column and a lower sliding column are respectively slidably arranged on the top and bottom surfaces of the C-shaped seat, and second limit nuts are respectively screwed on the top of the upper sliding column and the bottom of the lower sliding column; an electromagnet module is fixed at one end where the upper sliding column and the lower sliding column are close to each other.

[0007] Under normal conditions, the crane trolley travels back and forth on the guide rail, and the crane trolley drives the steel wire rope to unwind and wind, so as to realize hoisting, and the steel wire rope rises and falls in the pedestal; when the steel wire rope has a large swing amplitude, the steel wire rope presses on the force receiving plate, so that the force receiving plate drives the guide rod to slide along the pedestal, the force receiving plate compresses the spring body, the proximity switch of the force receiving plate is triggered, and a trigger instruction is sent to the PLC of the crane trolley; after the PLC of the crane trolley receives the instruction, the crane trolley immediately brakes and stops, and at the same time the electromagnet modules attract each other, so that the upper sliding column and the lower sliding column approach each other, so as to tightly hold the guide rail until the proximity switch is not triggered a second time within the threshold time; the electromagnet modules repel each other to release the state of holding the guide rail.

[0008] Further, the electromagnet module includes an electromagnet fixed to the upper sliding column through a base, and an electromagnet or a neodymium magnet fixed to the lower sliding column through a base; the electromagnet can be used to attract and hold the guide rail tightly or repel and disengage from the guide rail, avoiding abrasion to the guide rail.

[0009] Further, a guide wheel is fixed on the base, and the guide wheel is rollingly arranged on the top and bottom surfaces of the guide rail. Under normal conditions, the electromagnets repel each other, so that the upper sliding column and the lower sliding column are separated from each other, and the walking is guided by the guide wheel. When the proximity switch is triggered, the electromagnets attract each other tightly, so that the guide wheels are pressed against the guide rail.

[0010] Further, a reverse convex-shaped cylinder seat movably passes through the center of the pedestal, a limit plate is fixed to the bottom of the reverse convex-shaped cylinder seat through bolts, the limit plate fits the bottom surface of the pedestal, and a limit spring is arranged between the reverse convex-shaped cylinder seat and the pedestal; the steel wire rope of the crane trolley movably passes through the reverse convex-shaped cylinder seat, and the reverse convex-shaped cylinder seat can transmit the steel wire rope pressure to the force receiving plate. When the steel wire rope is transmitted to the reverse convex-shaped cylinder seat, the limit spring is compressed, and the reverse convex-shaped cylinder seat moves towards one side of the pedestal, so that the reverse convex-shaped cylinder seat presses on the force receiving plate.

[0011] Further, the proximity switch is a pressure transmitter, a mechanical proximity switch or an infrared proximity switch. When the hoisting rope (steel wire rope) swings, the hoisting rope presses on the proximity switch. If the pressure transmitter detects a set pressure, the mechanical proximity switch or the infrared proximity switch is triggered to act. When the proximity switch is triggered, a trigger instruction is sent to the PLC of the crane trolley.

[0012] Compared with the prior art, the safety protection device for hoisting machinery of the present utility model can quickly brake the hoisting machinery when the hoisting rope swings significantly, and can assist the crane trolley to tightly hold the guide rail at the same time, making it safer to use, and can prevent the walking wheels from deviating from the guide rail, thereby protecting the crane trolley and the guide rail for the trolley to travel on. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the safety protection device for hoisting machinery of the present utility model.

[0014] Figure 2 It is a schematic diagram of the overall structure of the protection module of the present utility model.

[0015] Figure 3 It is a schematic diagram of the structure of the installation guide wheel of the protection module of the present utility model.

[0016] Figure 4 It is a schematic diagram of the installation structure of the safety protection device for hoisting machinery and the inverted convex-shaped cylinder base of the present utility model.

[0017] Reference numerals: 1, guide rail; 2, crane trolley; 3, pedestal; 4, steel wire rope; 5, stress plate; 6, guide rod; 7, first limit nut; 8, spring body; 9, C-shaped seat; 10, upper sliding column; 11, lower sliding column; 12, second limit nut; 13, base; 14, electromagnet; 15, neodymium magnet; 16, guide wheel; 17, inverted convex-shaped cylinder base; 18, limit plate; 19, limit spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Embodiment 1:

[0019] As Figures 1 to 4 shown in the safety protection device for hoisting machinery, it includes a guide rail 1 installed at a high position, a crane trolley 2 is installed on the guide rail 1, and it further includes a safety protection component, and the safety protection component includes

[0020] a detection module, the detection module includes a pedestal 3, the pedestal 3 is fixed to the bottom surface of the crane trolley 2 and is arranged opposite to the wire winding and unwinding end of the crane trolley 2, and the steel wire rope 4 of the crane trolley 2 passes through the pedestal 3 movably; a plurality of stress plates 5 are arranged inside the pedestal 3, guide rods 6 are fixed on the mutually remote sides of the stress plates 5, the guide rods 6 pass through the pedestal 3 movably and are screwed with first limit nuts 7, and spring bodies 8 are arranged between the pedestal 3 and the stress plates 5 on the guide rods 6; proximity switches are arranged on the stress plates 5; the proximity switches are connected to the PLC of the crane trolley 2;

[0021] Protection module, the protection module includes a C-shaped seat 9, the C-shaped seat 9 is fixed to the crane trolley 2, and the C-shaped seat 9 is movably engaged with the top and bottom surfaces of the guide rail 1; a top sliding column 10 and a bottom sliding column 11 are respectively slidably arranged on the top and bottom surfaces of the C-shaped seat 9, and second limit nuts 12 are respectively screwed to the top of the top sliding column 10 and the bottom of the bottom sliding column 11; an electromagnet module is fixed to one end where the top sliding column 10 and the bottom sliding column 11 are close to each other.

[0022] Under normal conditions, the crane trolley 2 reciprocates on the guide rail 1, and the crane trolley 2 drives the steel wire rope 4 to unwind and wind up, so as to realize hoisting, and the steel wire rope 4 rises and falls in the pedestal 3; when the steel wire rope 4 has a large swing amplitude, the steel wire rope 4 presses on the force receiving plate 5, so that the force receiving plate 5 drives the guide rod 6 to slide along the pedestal 3, the force receiving plate 5 compresses the spring body 8, the proximity switch of the force receiving plate 5 is triggered, and a trigger instruction is sent to the PLC of the crane trolley 2; after the PLC of the crane trolley 2 receives the instruction, the crane trolley 2 immediately brakes and stops, and at the same time the electromagnet modules attract each other, so that the top sliding column 10 and the bottom sliding column 11 approach each other, so as to clamp the guide rail 1 tightly until the proximity switch is not triggered twice within the threshold time; the electromagnet modules repel each other to release the clamping state of the guide rail 1.

[0023] The electromagnet module includes an electromagnet 14 fixed to the top sliding column 10 through a base 13, and an electromagnet 14 or a neodymium magnet 15 fixed to the bottom sliding column 11 through a base 13; the electromagnet 14 can be used to attract and clamp the guide rail 1 tightly or repel and disengage from the guide rail 1, so as to avoid abrasion of the guide rail 1.

[0024] A guide wheel 16 is fixed to the base 13, and the guide wheel 16 is rotatably arranged on the top and bottom surfaces of the guide rail 1. Under normal conditions, the electromagnets 14 repel each other, so that the top sliding column 10 and the bottom sliding column 11 are separated from each other, and the walking is guided through the guide wheel 16. When the proximity switch is triggered, the electromagnets 14 attract each other tightly, so that the guide wheels 16 are pressed against the guide rail 1.

[0025] A reverse convex cylindrical seat 17 passes through the center of the pedestal 3 movably, a limit plate 18 is fixed to the bottom of the reverse convex cylindrical seat 17 by bolts, the limit plate 18 fits the bottom surface of the pedestal 3, and a limit spring 19 is arranged between the reverse convex cylindrical seat 17 and the pedestal 3; the steel wire rope 4 of the crane trolley 2 passes through the reverse convex cylindrical seat 17 movably, and the reverse convex cylindrical seat 17 can transfer the pressure of the steel wire rope 4 to the force receiving plate 5. When the steel wire rope 4 is transferred to the reverse convex cylindrical seat 17, the limit spring is compressed, and the reverse convex cylindrical seat 17 moves towards one side of the pedestal 3, so that the reverse convex cylindrical seat 17 presses on the force receiving plate 5.

[0026] The proximity switch is a pressure transmitter, a mechanical proximity switch or an infrared proximity switch. When the lifting rope (steel wire rope 4) swings, the lifting rope presses against the proximity switch. For example, when the pressure transmitter detects the set pressure, the mechanical proximity switch or the infrared proximity switch is triggered. When the proximity switch is triggered, a trigger command is sent to the PLC of the crane trolley 2.

[0027] The above embodiments are only the preferred embodiments of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention application are included in the scope of the present invention application.

Claims

1. A safety protection device for a hoisting machine, comprising a guide rail installed at a high position, and a crane trolley is installed on the guide rail, and it is characterized in that: It further includes a safety protection component, and the safety protection component includes a detection module. The detection module includes a pedestal which is fixed to the bottom surface of the crane trolley and is arranged opposite to the wire winding and unwinding end of the crane trolley. The steel wire rope of the crane trolley passes through the pedestal movably; a plurality of stress plates are arranged inside the pedestal. A guide rod is fixed on one side of the stress plates away from each other. The guide rod passes through the pedestal movably and is screwed with a first limit nut. A spring body is arranged between the pedestal and the stress plate on the guide rod; a proximity switch is arranged on the stress plate; the proximity switch is connected to the PLC of the crane trolley; a protection module. The protection module includes a C-shaped seat which is fixed to the crane trolley. The C-shaped seat is movably clamped on the top surface and the bottom surface of the guide rail; an upper sliding column and a lower sliding column are respectively arranged on the top surface and the bottom surface of the C-shaped seat in a sliding manner. A second limit nut is respectively screwed on the top of the upper sliding column and the bottom of the lower sliding column; an electromagnet module is fixed at one end of the upper sliding column and the lower sliding column close to each other.

2. The safety protection device for a hoisting machine according to claim 1, wherein: The electromagnet module includes an electromagnet fixed to the upper sliding column through a base, and an electromagnet or a neodymium magnet fixed to the lower sliding column through a base.

3. The safety protection device for a hoisting machine according to claim 2, characterized in that: A guide wheel is fixed on the base, and the guide wheel is arranged on the top surface and the bottom surface of the guide rail in a rolling manner.

4. The safety protection device for a hoisting machine according to claim 1, characterized in that: A reverse convex cylinder seat passes through the center of the pedestal movably. A limit plate is fixed to the bottom of the reverse convex cylinder seat through a bolt. The limit plate is attached to the bottom surface of the pedestal. A limit spring is arranged between the reverse convex cylinder seat and the pedestal; the steel wire rope of the crane trolley passes through the reverse convex cylinder seat movably.

5. The safety protection device for a hoisting machine according to claim 1, characterized in that: The proximity switch is a pressure transmitter, a mechanical proximity switch or an infrared proximity switch.

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