Anti-collision crown block safety device, early warning device of anti-collision crown block safety device and early warning method of early warning device

Abstract

The invention relates to the technical field of drilling engineering, and discloses an anti-collision crown block safety device, an early warning device of the anti-collision crown block safety device and an early warning method of the early warning device.The anti-collision crown block safety device comprises a safety device body arranged below a derrick, the safety device body is connected to the bottom of an anti-collision rope in a hung mode, and the upper portion of the anti-collision rope is located above a traveling block; the safety device body is also connected with a brake switch of the traveling block; when the traveling block collides with the upper portion of the anti-collision rope during traveling, the safety device body is separated from the anti-collision rope to trigger the brake switch, and the traveling block stops ascending. The device has the beneficial effects that the braking effect is good, an operator can be effectively reminded in time when braking succeeds and fails, and reliability is good.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling engineering, and particularly relates to an anti-collision crown block safety device, an early warning device thereof, and an early warning method for the early warning device. Background Art

[0002] During the process of drilling and hoisting the drill pipe, when the traveling block moves upward, it may hit the crown block due to mechanical failures or mistakes made by the operator of the traveling block, resulting in serious personal injuries and property losses. Therefore, preventing the traveling block from rising too high and hitting the crown block is a very important safety measure. To ensure the effectiveness of this safety measure, it is usually necessary to set up a safety device to prevent accidents where the traveling block continues to move upward beyond the limit height and hits the crown block. However, on-site operators sometimes forget to set up the safety device before starting the traveling block. In this case, even if the traveling block exceeds the limit height, it will continue to move upward, causing serious safety accidents; and some existing safety devices do not notify the operators for handling after braking; in addition, the most important thing is that if the braking of the safety device fails, the operators need to be reminded in time for emergency handling, otherwise serious safety accidents will also occur. Summary of the Invention

[0003] To overcome the problems in the above background art, the present invention provides an anti-collision crown block safety device. By setting up the safety device and the early warning device, it can perform emergency braking and early warning on the traveling block that exceeds the limit height, and has the beneficial effects of good braking effect, being able to effectively and timely remind the operators when the braking is successful and when the braking fails, and good reliability.

[0004] The technical solution of the present invention is as follows:

[0005] An anti-collision crown block safety device includes a safety device body arranged below the derrick. The safety device body is hung at the bottom of an anti-collision rope, and the upper part of the anti-collision rope is located above the traveling block; the safety device body is also connected to the braking switch of the traveling block; when the traveling block moves upward and hits the upper part of the anti-collision rope, the safety device body disengages from the anti-collision rope and triggers the braking switch, and the traveling block stops moving upward.

[0006] Preferably, the safety device body is arranged obliquely and includes a hanging ring, a weight disk, and a brake rod fixedly connected in sequence from top to bottom. A hook is provided at the bottom of the anti-collision rope, and the hanging ring is hung on the hook. The bottom end of the brake rod is connected to the braking switch; after the hanging ring disengages from the hook, the safety device body drops under the action of the weight disk, the brake rod rotates downward, the braking switch is turned on, the traveling block stops moving upward, and the safety device body then stops on the derrick leg.

[0007] Further preferably, the braking switch is the air source switch of a cylinder. When the traveling block moves up and down normally, the air source switch is in the closed state. When the safety device body disengages from the anti-collision rope, the air source switch is turned on, and the piston rod of the cylinder extends for braking.

[0008] Further preferably, the fixed end of the traveling block is fixedly connected to one end of a suspension rope lapped on the top of the derrick, and the other end of the suspension rope is wound and fixed on a drum. The rotation of the drum drives the traveling block to move up and down. The drum is fixed on a base below the derrick through a bearing block. Two groups of cylinders are respectively fixed on both sides of the drum, and the extending direction of the piston rod thereof is opposite to the rolling surface of the drum.

[0009] Further preferably, a brake band is also fixed to the movable end of the piston rod. The brake band is a curved surface structure that fits the rolling surface of the drum. When the piston rod extends, the brake band is in close contact with both ends of the rolling surface of the drum respectively. A plurality of protruding lines are respectively arranged on the contact surfaces of the brake band and the drum. The brake band is made of ceramic material or semi-metallic brake band.

[0010] The present invention also provides a technical solution:

[0011] An early warning device is installed on the safety device of the anti-collision crown block. The early warning device gives an early warning when the safety device body is separated from the anti-collision rope.

[0012] Preferably, the early warning device includes an inductor and an alarm which are electrically connected. The inductor is installed at the bottom of the anti-collision rope or on the top of the safety device body, and is used to identify whether the safety device body is hooked at the bottom of the anti-collision rope. When it is identified that the safety device body is in an unhooked state, the alarm emits an alarm signal.

[0013] Preferably, the early warning device includes a pressure sensor and an alarm which are electrically connected. The pressure sensor is installed at the bottom of the anti-collision rope and is used to measure the pressure of the safety device body on the anti-collision rope. When the measured pressure is zero, the alarm emits an alarm signal.

[0014] Preferably, it further includes a contact sensor and a reminder which are electrically connected. The contact sensor is arranged on the derrick leg below the derrick. When the safety device body moves downward and collides with the contact sensor after being separated from the anti-collision rope, the reminder gives a safety reminder.

[0015] The present invention also provides a technical solution:

[0016] An early warning method for an early warning device includes the following steps:

[0017] Step 1: After completing the start-up preparation work of the traveling block, hook the safety device body to the bottom of the anti-collision rope, and turn on the power switch of the early warning device. If the safety device body is in an unhooked state, the alarm will give an alarm to prompt the operator to hang the safety device body in time.

[0018] Step 2: When the traveling block moves upward beyond the limit height and hits the upper part of the anti-collision rope, the safety device body detaches from the anti-collision rope, and the alarm goes off; when the safety device body rotates downward and touches the contact sensor, the alarm stops, and the reminder emits a reminder sound.

[0019] Step 3: When the safety device body detaches from the anti-collision rope and does not rotate downward to touch the contact sensor, the alarm keeps going off.

[0020] Compared with the prior art, the beneficial effects of the above technical solution are as follows:

[0021] (1) By hanging the safety device body at the bottom of the anti-collision rope, when the traveling block moves upward beyond the limit height of the derrick, it will surely hit the upper part of the anti-collision rope. At this time, under the strong impact, the bottom of the anti-collision rope will swing violently, and the safety device body hung at the bottom will be shaken off. Since the safety device body is connected to the brake switch of the traveling block, when the safety device body detaches from the anti-collision rope, it will move downward to trigger the brake switch, and the traveling block will stop moving upward, avoiding serious personal injuries and property losses caused by the traveling block hitting the crown block when moving upward too high.

[0022] (2) When the operator forgets to hang the safety device body, after turning on the power switch of the warning device, if the inductor or pressure sensor does not recognize the safety device body, it will control the alarm to go off, effectively warning the on-site operator to hang the safety device body in time before starting the traveling block to ensure firm hanging. The cooperation between the inductor or pressure sensor and the alarm serves the purpose of early warning, with low use cost, simple and convenient installation, and wide application.

[0023] (3) When the traveling block is moving upward, if the safety device body detaches from the anti-collision rope and the inductor or pressure sensor does not recognize the safety device body, it will control the alarm to go off. When the safety device body moves downward and touches the contactor, the alarm stops, and the reminder emits a continuous reminder sound. The brake switch has been turned on. Therefore, when the operator hears the reminder sound of the reminder, it means that the traveling block has risen to the limit height and has been successfully braked, and it is necessary to deal with it in time.

[0024] (4) When the safety device body detaches from the anti-collision rope but does not move downward to touch the contactor, only the alarm will emit an alarm sound, indicating that the braking is not successful, and the operator needs to quickly carry out emergency treatment.

[0025] In summary, the present invention can ensure that the safety device body is in a suspended state before the traveling block starts, and can brake when the traveling block rises beyond the limit height, and give different warnings in a timely manner for different situations of successful or failed braking, avoiding or reducing casualties of on-site operators, equipment and property losses, and causing more serious safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be described with reference to the accompanying drawings, in which:

[0027] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0028] Figure 2 is a schematic connection structure diagram of the safety device body of the present invention;

[0029] Figure 3 is a three-dimensional connection structure diagram of the safety device body when the inductor of the present invention is installed at the bottom of the anti-collision rope;

[0030] Figure 4 is a three-dimensional connection structure diagram of the safety device body of the present invention using a pressure sensor;

[0031] Figure 5 is a three-dimensional connection structure diagram of the safety device body when the inductor of the present invention is installed at the top of the safety device body.

[0032] Reference numerals: derrick 1, pulley 11, derrick thigh 12, side plate 13, strip-shaped movable hole 131, base 14, anti-collision rope 2, hook 21, safety device body 3, hanging ring 31, weight tray 32, brake lever 33, connecting shaft 34, cylinder 4, brake switch 41, intake valve 42, air supply pipeline 43, piston rod 44, brake band 45, drum 5, main shaft 51, diesel engine 52, traveling block 6, suspension rope 61, inductor 71, alarm 72, pressure sensor 73, contact sensor 74, reminder 75, crown block 8. Specific embodiments

[0033] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Embodiment 1: As Figures 1 to 5An anti-collision crown block safety device as shown includes an anti-collision rope 2 arranged on the derrick 1 and a safety device body 3 below the derrick 1. The anti-collision rope 2 is a steel wire rope. The top of the anti-collision rope 2 is horizontally arranged at the position of the upper limit height of the derrick 1 and is directly above the traveling block 6. One end of its top is fixed on one side of the derrick 1, and the other end horizontally extends to the other side of the derrick 1, and laps on the surface of the pulley 11 fixed on the other side of the derrick 1, and extends downward from the lapped surface of the pulley 11 to the derrick leg 12 at the bottom of the derrick 1. The safety device body 3 is hung on the bottom of the anti-collision rope 2. When the anti-collision rope 2 hangs the safety device body 3, it remains in a taut state. The safety device body 3 is also connected to the brake switch 41 of the traveling block 6. When the traveling block 6 moves upward and hits the upper part of the anti-collision rope 2, the safety device body 3 disengages from the anti-collision rope 2 and triggers the brake switch 41, and the traveling block 6 stops moving upward. Among them, the vertical distance between the top of the anti-collision rope 2 and the bottom of the crown block 8 should be greater than 4 meters, leaving a certain braking distance to ensure the effectiveness of braking, and also leaving time for the operators to handle emergencies when the safety device body 3 fails to successfully trigger the brake switch 41. The actual distance can be set according to the on-site construction conditions. When a drilling rig with a drilling mileage of 2000 - 4000m is selected, the vertical distance between the top of the anti-collision rope 2 and the bottom of the crown block 8 should be 4 - 5m; when a drilling rig with a drilling mileage of more than 4500m is selected, the vertical distance between the top of the anti-collision rope 2 and the bottom of the crown block 8 should be 6 - 8m.

[0035] In this embodiment, by hanging the safety device body 3 on the bottom of the anti-collision rope 2, when the traveling block 6 moves upward beyond the limit height of the derrick 1, it will surely hit the upper part of the anti-collision rope 2. At this time, under the strong impact, the bottom of the anti-collision rope 2 will swing violently, and the safety device body 3 hung on the bottom will be shaken off. Since the safety device body 3 is connected to the brake switch 41 of the traveling block 6, when the safety device body 3 disengages from the anti-collision rope 2, it will move downward and trigger the brake switch 41, and the traveling block 6 will stop moving upward, avoiding serious personal injuries and property losses caused by the traveling block 6 hitting the crown block after moving upward too high.

[0036] Embodiment 2: Based on Embodiment 1, the safety device body 3 is optimally designed. The safety device body 3 is arranged obliquely, and includes a hanging ring 31, a pendant 32 and a gate rod 33 which are fixedly connected from top to bottom, wherein the pendant 32 is a solid iron disc structure, and the hanging ring 31 is a rectangular frame structure. The lower part of the hanging ring 31 is hingedly fixed to the upper part of the pendant 32 by a connecting shaft 34. The bottom of the anti-collision rope 2 is provided with a hook 21, and the hook 21 is made of iron wire or steel wire. The hanging ring 31 is hung on the hook 21. When the traveling car 6 impacts the anti-collision rope 2, the hook 21 will be deformed under the action of the huge upward pulling force, and the hook 21 will be violently swung and then separated from the hanging ring 31. The bottom of the pendant 32 is fixed to the top of the gate rod 33 by threaded connection or welding, and the bottom end of the gate rod 33 is connected to the brake switch 41. After the hanging ring 31 is separated from the hook 21, the safety device body 3 falls under the action of the sinker 32, and the gate rod 33 rotates downward, so that the brake switch 41 is turned on, the traveling block 6 stops moving upward, and the safety device body 3 is parked on the derrick thigh 12 at the bottom of the derrick 1, and the sinker 32 is connected to the side of the derrick thigh 12. In addition, the hanging ring 31 and the hook 21 are made of magnetic materials or installed with magnets, and the two are stably connected by magnetic force, which can increase the reliability and applicability of the connection.

[0037] Furthermore, the brake switch 41 is the air source switch of the cylinder 4, and the air source switch is arranged in the derrick thigh 12. A side plate 13 is fixed next to the derrick thigh 12. A vertically arranged strip movable hole 131 is opened on the side plate 13. One end of the gate rod 33 passes through the strip movable hole 131 and is connected to the air source switch to open or close the air source of the cylinder 4. The gate rod 33 can move up and down in the strip movable hole 131.

[0038] Specifically, the air source switch uses a shut-off valve, the bottom end of the gate rod 33 is connected to the air inlet valve 42 of the shut-off valve, the outlet of the shut-off valve is connected to the inlet of the air source pipeline 43 of the cylinder 4, when the traveling carriage 6 goes up and down normally, the air inlet valve 42 of the shut-off valve is in a closed state, when the safety device body 3 is separated from the anti-collision rope 2, the gate rod 33 rotates downward to drive the air inlet valve 42 of the shut-off valve to open, the air source pipeline 43 is connected to compressed air, the cylinder 4 starts to work, and its piston rod 44 extends to brake the traveling carriage 6.

[0039] Among them, the traveling block 6 is braked by the drum 5. The operation efficiency of the traveling block 6 is high, the energy consumption is low, and the traveling block 6 is braked by the drum 5. The traveling block 6 is suitable for occasions of frequent starting and stopping, and the movement process is more stable. The main shaft 51 of the drum 5 is connected to the output end of the diesel engine 52. The diesel engine 52 drives the drum 5 to rotate and is fixed to the base 14 below the derrick 1 through the bearing seat. The top of the derrick 1 is the overhead crane 8, and the overhead crane 8 is equipped with a pulley 11. The fixed end of the traveling block 6 is fixedly connected to one end of the suspension rope 61 passing around the pulley 11, and the other end of the suspension rope 61 is wound and fixed on the drum 5. The rotation of the drum 5 drives the traveling block 6 to move up and down. The suspension rope 61 is a steel wire rope.

[0040] The air cylinder 4 brakes the roller 5. Specifically, there are two groups of air cylinders 4 fixed on the outer sides of both ends of the rolling surface of the roller 5 on the bases 14. The extending direction of the piston rod 44 of the air cylinder 4 is directly opposite to the rolling surface. When the piston rod 44 extends, its movable end abuts against both ends of the rolling surface to brake the roller 5.

[0041] Furthermore, a brake band 45 is fixed to the movable end of the piston rod 44. The brake band 45 is a curved surface structure that matches the rolling surface of the roller 5. When the piston rod 44 extends, the brake band 45 closely adheres to both ends of the rolling surface of the roller 5 respectively. Among them, a number of protruding patterns are respectively provided on the contact surfaces of the brake band 45 and the roller 5, which can increase the friction between the brake band 45 and the roller 5 during braking, achieving the effect of rapid braking. The brake band 45 is selected from a ceramic brake band or a semi - metallic brake band. The ceramic brake band has extremely high wear - resistance and high - temperature resistance, and at the same time has excellent braking effect and low noise; it combines the advantages of organic and metallic brake bands, has stable performance, has high braking ability and shock - absorption performance, and the braking force during braking is more stable and progressive, and it is not easy to have a jamming phenomenon.

[0042] Embodiment 3: On the basis of the above - mentioned embodiment, an early - warning device installed in the anti - collision crown block safety device is further provided. The triggering device of the early - warning device is located at the connection of the anti - collision rope 2 and the safety device body 3. The early - warning device gives an early warning when the safety device body 3 is separated from the anti - collision rope 2, that is, when the safety device body 3 is separated from the anti - collision rope 2, the early - warning device gives an early warning.

[0043] A specific implementation manner is that the early - warning device includes a sensor 71 and an alarm 72. The sensor 71 and the alarm 72 are connected through wireless connection in the electrical connection. The sensor 71 is the triggering device of the early - warning device. As Figure 3 shown, the sensor 71 is installed on the hook 21 at the bottom of the anti - collision rope 2, and when the hanging ring 31 is hooked on the hook 21, the sensor 71 must be able to sense the hanging ring 31. The sensor 71 can be fixed in the groove of the hook 21, and the top of the hanging ring 31 is located above the groove. Once the hanging ring 31 is separated from the hook 21, the sensor 71 can no longer sense the hanging ring 31, then the alarm 72 is controlled to give an alarm; or as Figure 5 shown, the sensor 71 is fixed on the top of the safety device body 3, that is, fixed on the inner top surface (below the top surface) of the hanging ring 31 of the safety device body 3, for sensing the hook 21 inside the hanging ring 31. Once the hook 21 is separated from the hanging ring 31, the sensor 71 can no longer sense the hook 21, then the alarm 72 is controlled to give an alarm. During actual use, in order to avoid misjudgment, the monitoring distance of the sensor 71 can be set.

[0044] Among them, the sensor 71 can be a door magnetic sensor 71, an infrared proximity sensor (working principle: the infrared proximity sensor emits infrared light and detects the reflected infrared light; when an object approaches, the intensity of the reflected infrared light increases, and the sensor determines the presence of the object based on this), an ultrasonic proximity sensor (working principle: the ultrasonic proximity sensor emits ultrasonic pulses and detects the reflected ultrasonic waves; by calculating the round-trip time of the ultrasonic waves, the distance of the object can be determined), an inductive proximity sensor (working principle: the inductive proximity sensor determines the presence of an object by detecting changes in the magnetic field near a metal object; when a metal object approaches, the inductance value of the sensor changes, thereby triggering an output signal), a capacitive proximity sensor (working principle: the capacitive proximity sensor determines the presence of an object by detecting changes in the capacitance value; when an object approaches, the capacitance value of the sensor changes, thereby triggering an output signal), or an optical fiber proximity sensor (working principle: the optical fiber proximity sensor transmits optical signals through optical fibers and detects the reflected optical signals; when an object approaches, the intensity of the reflected optical signals increases, and the sensor determines the presence of the object based on this).

[0045] Specifically, another implementation manner is that the warning device includes a pressure sensor 73 and an alarm 72, and the two are connected through wireless connection in electrical connection. The pressure sensor 73 is the triggering device of the warning device, such as Figure 4 shown, the pressure sensor 73 is installed on the hook 21 at the bottom of the anti-collision rope 2 for measuring the pressure of the safety device body 3 on the anti-collision rope 2. When the measured pressure is zero, the alarm 72 issues an alarm signal; the pressure sensor 73 can also be installed at the place where the bottom of the anti-collision rope 2 is connected to the hook 21 for measuring the weight borne by the bottom of the anti-collision rope 2 in real time. When the borne weight drops significantly and is less than or equal to the weight of the hook 21, it means that the hanging ring 31 has detached from the hook 21, and the alarm 72 issues an alarm signal.

[0046] Among them, the alarm 72 can be fixed on the top surface of the hanging ring 31 or on the side plate 13 beside the derrick thigh 12. The alarm 72 is selected as an audible and visual alarm. When the alarm 72 is triggered, the alarm 72 emits a beeping alarm sound and is accompanied by a signal light prompt.

[0047] The warning device set in this implementation can effectively warn the on-site operators to hang the hook 21 of the traveling block 6 in time before starting the traveling block 6 and ensure that the hanging is secure, avoiding the problem that the traveling block 6 rises too high and hits the crown block, causing serious safety accidents, and avoiding or reducing casualties of on-site operators and losses of equipment and property; it can also effectively remind the on-site operators to turn off the power in time for processing after the safety device body 3 detaches from the anti-collision rope 2 and triggers the brake switch 41 to brake the traveling block 6.

[0048] Embodiment 4: On the basis of Embodiment 3, an optimized design is carried out, which further includes a contact sensor 74 and a prompter 75. The two are connected through wireless connection in electrical connection. Since the safety device body 3 will dock on the derrick leg 12 at the bottom of the derrick 1 when it detaches from the anti-collision rope 2, and its dropping disc 32 will contact the side of the derrick leg 12 below the derrick 1, the contact sensor 74 can be arranged at the position where the side of the derrick leg 12 will contact the dropping disc 32. At this time, when the safety device body 3 detaches from the anti-collision rope 2, the dropping disc 32 will surely contact the contact sensor 74.

[0049] The contact sensor 74 can be a switch-type contact sensor 74. This type of contact sensor 74 connects or disconnects the switch pins inside the sensor through the mechanical pressure during object contact. When the sensor is pressed down, the switch pins are powered on, indicating the existence of object contact. When the sensor is not pressed down, the switch pins are powered off, indicating the disconnection of object contact; or a proximity-type contact sensor 74 can be selected. This type of contact sensor 74 usually uses the electromagnetic principle. When an object approaches the sensor, the object will cause changes in the internal electric or magnetic field of the sensor, and the sensor can detect these changes to determine whether the object is approaching the sensor; or a pressure-type contact sensor 74 can be selected. This type of contact sensor 74 determines whether an object is in contact by measuring the pressure or force applied by the object. When an object applies pressure, the pressure-sensitive element will deform or generate an electrical signal, and the sensor can receive this signal and determine whether the object is in contact.

[0050] The contact sensor 74 converts the contact signal into an electrical signal and transmits it to the prompter 75. The prompter 75 will emit a safety prompt sound, indicating that the safety device body 3 has successfully played its role and the traveling block 6 stops ascending. The safety prompt sound emitted by the prompter 75 can be in the form of voice broadcast. Among them, the prompter 75 can also be installed on the side plate 13 beside the derrick leg 12 or on the top surface of the mounting ring 31, or the prompter 75 shares a set of alarm device with the alarm 72 and emits different sounds according to different situations.

[0051] In addition, the contact sensor 74 is electrically connected to the alarm 72. When the contact sensor 74 is triggered, the alarm 72 can be controlled to stop alarming, and at the same time, the prompter 75 gives a prompt for successful braking. The two emit different sounds, and the prompter 75 can use voice prompts.

[0052] Embodiment 3: On the basis of the above embodiment, an early warning method for the early warning device is also provided, including the following steps:

[0053] Step 1: After completing the startup preparation of the traveling block 6, hang the safety device body 3 at the bottom of the anti-collision rope 2, that is, hang the hanging ring 31 of the safety device body 3 on the hook 21 at the bottom of the anti-collision rope 2, and turn on the power switch of the warning device, that is, connect the power supply to the alarm 72 and the reminder 75. If the safety device body 3 is in an unhooked state, the alarm 72 will give an alarm to prompt the operator to hang the safety device body 3 in time;

[0054] Step 2: When the traveling block 6 moves upward and hits the upper part of the anti-collision rope 2 exceeding the limit height, the safety device body 3 detaches from the anti-collision rope 2. When the inductor 71 or the pressure sensor 73 does not recognize that the safety device body 3 is hung at the bottom of the anti-collision rope 2, a signal is transmitted to the alarm 72, and the alarm 72 emits an alarm sound; after the safety device body 3 detaches from the anti-collision rope 2, it will rotate downward under the action of the falling disk 32 and contact the contact sensor 74. At this time, the contact sensor 74 transmits a signal to the alarm 72 and the reminder 75. The alarm 72 stops alarming, and the reminder 75 emits a reminder sound;

[0055] Step 3: When the safety device body 3 detaches from the anti-collision rope 2 and does not rotate downward to contact the contact sensor 74, the alarm 72 continues to alarm, and the reminder 75 does not emit a reminder sound.

[0056] When the operator forgets to hang the safety device body 3, after turning on the power switch of the warning device, if the inductor 71 or the pressure sensor 73 does not recognize the safety device body 3, it will control the alarm 72 to give an alarm, which can effectively warn the on-site operator to hang the safety device body 3 in time before starting the traveling block 6 to ensure firm hanging. The cooperation between the inductor 71 or the pressure sensor 73 and the alarm 72 serves the purpose of early warning, with low use cost, simple and convenient installation, and wide application.

[0057] When the traveling block 6 is moving upward, if the safety device body 3 detaches from the anti-collision rope 2 and the inductor 71 or the pressure sensor 73 does not recognize the safety device body 3, it will control the alarm 72 to give an alarm. When the safety device body 3 moves downward and contacts the contactor, the alarm 72 stops alarming, and the reminder 75 emits a continuous reminder sound. The brake switch 41 has been turned on. Therefore, when the operator hears the reminder sound of the reminder 75, it means that the traveling block 6 has risen to the limit height and has been successfully braked, and it is necessary to deal with it in time;

[0058] When the safety device body 3 detaches from the anti-collision rope 2 but does not move downward to contact the contactor, only the alarm 72 will emit an alarm sound, indicating that the braking is not successful, and the operator needs to quickly carry out emergency treatment.

[0059] Therefore, through the above warning device and warning method, it can be ensured that the main body 3 of the safety device is in a suspended state before the traveling block 6 starts, and when the traveling block 6 rises beyond the limit height, different warning methods can be timely carried out for different situations of successful braking or failed braking, so as to avoid or reduce casualties of on-site operators, equipment and property losses, and cause more serious safety accidents.

[0060] The above embodiments only represent the specific implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the protection scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the technical solution of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A collision-proof overhead crane safety device, characterized in that: The invention comprises a safety device body (3) arranged below a derrick (1), wherein the safety device body (3) is hung at the bottom of an anti-collision rope (2), and the upper part of the anti-collision rope (2) is located above a traveling carriage (6); the safety device body (3) is also connected to a brake switch (41) of the traveling carriage (6); when the traveling carriage (6) moves upward and collides with the upper part of the anti-collision rope (2), the safety device body (3) is separated from the anti-collision rope (2) to trigger the brake switch (41), and the traveling carriage (6) stops moving upward.

2. The anti-collision overhead crane safety device according to claim 1, characterized in that: The safety device body (3) is arranged obliquely, and comprises a hanging ring (31), a falling plate (32) and a gate rod (33) which are fixedly connected in sequence from top to bottom. A hook (21) is provided at the bottom of the anti-collision rope (2), the hanging ring (31) is hung on the hook (21), and the bottom end of the gate rod (33) is connected to a brake switch (41); after the hanging ring (31) is separated from the hook (21), the safety device body (3) falls under the action of the falling plate (32), the gate rod (33) rotates downward, the brake switch (41) is turned on, the traveling block (6) stops moving upward, and the safety device body (3) is parked on the derrick thigh (12).

3. The anti-collision overhead crane safety device according to claim 1 or claim 2, characterized in that: The brake switch (41) is the air source switch of the air cylinder (4). When the traveling carriage (6) moves up and down normally, the air source switch is in a closed state. When the safety device body (3) is separated from the anti-collision rope (2), the air source switch is turned on and the piston rod (44) of the air cylinder (4) is extended to brake.

4. The anti-collision overhead crane safety device according to claim 3, characterized in that: The fixed end of the traveling carriage (6) is fixedly connected to one end of a suspension rope (61) overlapped on the top of the derrick (1), and the other end of the suspension rope (61) is wound and fixed on the drum (5). The rotation of the drum (5) drives the traveling carriage (6) to move up and down; the drum (5) is fixed to a base (14) below the derrick (1) through a bearing seat, and the cylinder (4) is provided with two groups respectively fixed on both sides of the drum (5), and the extension direction of the piston rod (44) thereof is opposite to the rolling surface of the drum (5).

5. The anti-collision overhead crane safety device according to claim 4, characterized in that: A brake band (45) is also fixed to the movable end of the piston rod (44). The brake band (45) is a curved surface structure that matches the rolling surface of the roller (5). When the piston rod (44) is extended, the brake band (45) is tightly fitted to the two ends of the rolling surface of the roller (5). A plurality of protruding patterns are respectively provided on the contact surfaces of the brake band (45) and the roller (5). The brake band (45) is made of ceramic material or a semi-metallic brake band.

6. An early warning device, characterized in that: Installed on the anti-collision overhead crane safety device according to any one of claims 1 to 5, the early warning device issues an early warning when the safety device body (3) is separated from the anti-collision rope (2).

7. The early warning device according to claim 6, characterized in that: The early warning device comprises an electrically connected sensor (71) and an alarm (72); the sensor (71) is mounted at the bottom of the anti-collision rope (2) or the top of the safety device body (3) and is used to identify whether the safety device body (3) is hooked to the bottom of the anti-collision rope (2); when it is identified that the safety device body (3) is in an unhooked state, the alarm (72) sends an alarm signal.

8. The early warning device according to claim 6, characterized in that: The early warning device comprises an electrically connected pressure sensor (73) and an alarm (72); the pressure sensor (73) is installed at the bottom of the anti-collision rope (2) and is used to measure the pressure of the safety device body (3) on the anti-collision rope (2); when the measured pressure is zero, the alarm (72) sends an alarm signal.

9. The early warning device according to claim 6, characterized in that: It also includes an electrically connected contact sensor (74) and a reminder (75), wherein the contact sensor (74) is arranged on the derrick thigh (12) below the derrick (1), and when the safety device body (3) separates from the anti-collision rope (2) and moves downward to collide with the contact sensor (74), the reminder (75) issues a safety reminder.

10. An early warning method of the early warning device according to any one of claims 6 to 9, characterized in that: The following steps are involved: Step 1: After completing the starting preparation work of the traveling carriage (6), the safety device body (3) is hung at the bottom of the anti-collision rope (2), and the power switch of the early warning device is turned on. If the safety device body (3) is in an unhooked state, the alarm (72) sounds an alarm, prompting the operator to hang up the safety device body (3) in time; Step 2: When the traveling carriage (6) goes up beyond the limit height and hits the upper part of the anti-collision rope (2), the safety device body (3) is separated from the anti-collision rope (2), and the alarm (72) sounds an alarm; when the safety device body (3) rotates downward and contacts the contact sensor (74), the alarm (72) stops sounding, and the reminder (75) sounds a reminder sound; Step 3: When the safety device body (3) is separated from the anti-collision rope (2) and does not rotate downward to contact the contact sensor (74), the alarm (72) continues to alarm.

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