CN116902839A - A lifting safety monitoring device with the function of alarming and stopping operations - Google Patents

Abstract

The invention relates to the field of lifting safety monitoring devices, and in particular to a lifting safety monitoring device with a function of alarming and stopping operations. The technical solution includes a crane body, the crane body includes a cross bar, and one end of the bottom of the cross bar is fixedly connected with a traction mechanism. The traction mechanism includes an outer shell. The top end of the inner wall of the outer shell is engaged with a first fixed pulley. The bottom end of the inner wall of the outer shell is engaged with a second fixed pulley. One end of the inner wall of the outer shell is fixedly connected to an electric push rod. The electric push rod One end of the rod is fixedly connected with a connecting seat, and both ends of one side of the connecting seat are fixedly connected with telescopic mechanisms. One end of the two telescopic mechanisms are engaged with a brushless motor, and the surface of the brushless motor is fixedly connected with a rubber layer. First, The outer wall of the fixed pulley is equipped with a traction rope. When the swing range of the sling is too large, it will contact the touch induction ring and transmit a signal. The signal will be transmitted to the crane's own monitoring system and then an alarm will be issued. The alarm will also stop the crane and continue operations. .

Description

A lifting safety monitoring device with the function of alarming and stopping operations

Technical field

The invention relates to the field of lifting safety monitoring devices, specifically a lifting safety monitoring device with an alarm function to stop operations.

Background technique

Cranes are indispensable equipment for modern industrial production. They are widely used in factories, ports, construction sites, mines, railways, hotels, residential buildings and other places to complete the lifting, transportation, loading and unloading, installation and personnel transportation of various materials. and operations, thereby greatly reducing the intensity of physical labor, improving labor productivity, and improving people's quality of life. Some cranes can also perform certain special process operations in production, making it easier to mechanize and automate the production process. Because cranes have a large working range and generally lift heavy items in the air, there are many potential dangerous factors during their use. Therefore, existing cranes are basically equipped with monitoring and management systems. The improvement and use of these monitoring facilities are an important guarantee for the safe operation of large lifting machinery.

At present, when the crane's sling is hoisting some heavy objects, due to its own inertia, it is easily affected by the wind or rotating too fast, causing the sling to sway together with the lifted object. Once the sling swings too much, Not only will it pose a certain threat to the overall structural safety of the crane, but the items hoisted on the hooks can also easily fall due to shaking, which in turn will affect the safety of life and property at the construction site. In view of this, we propose an alarm stop system. The lifting safety monitoring device with operation function solves the existing problems.

Contents of the invention

The purpose of the present invention is to provide a lifting safety monitoring device with an alarm and stop operation function, so as to solve the problems raised in the above background technology.

In order to achieve the above object, the present invention provides the following technical solution: a lifting safety monitoring device with an alarm and stop operation function, including a crane body, the crane body includes a cross bar, and one end of the bottom of the cross bar is fixedly connected with a traction mechanism , the traction mechanism includes an outer shell, the top end of the inner wall of the outer shell is engaged with a first fixed pulley, the bottom end of the inner wall of the outer shell is engaged with a second fixed pulley, one end of the inner wall of the outer shell An electric push rod is fixedly connected. One end of the electric push rod is fixedly connected with a connecting seat. Both ends of one side of the connecting seat are fixedly connected with telescopic mechanisms. One end of the two telescopic mechanisms are engaged with a brushless Motor, the surface of the brushless motor is fixedly connected with a rubber layer, the outer wall of the first fixed pulley is covered with a traction rope, and one end of the traction rope is fixedly connected with a counterweight.

Preferably, the inner walls on both sides of the outer shell are provided with chute, and the first clamping shafts are fixedly connected to both sides of the brushless motor and the connecting seat, and the outer walls of the two first clamping shafts are respectively Snap-connected to the inner walls of the two chutes.

Preferably, both sides of the first fixed pulley and both sides of the second fixed pulley are fixedly connected with a second clamping shaft, and the outer wall of the second clamping shaft is connected to the inner wall of the outer shell.

Preferably, the telescopic mechanism includes a sleeve, and a telescopic rod is inserted through the inner wall of the sleeve.

Preferably, one end of the telescopic rod is fixedly connected to a collision plate, one end of the inner wall of the casing is fixedly connected to a spring, and one end of the spring conflicts with one side of the collision disk.

Preferably, one side of the bottom end of the crossbar is fixedly connected with two electric lifting rods, the bottoms of the two electric lifting rods are jointly provided with a touch sensing ring, and the bottom end of the crossbar is movable with a sling. The bottom end of the sling is engaged with a hook seat.

Preferably, one end of the hook base is fixedly connected to a connecting ring, and the other end of the traction rope is fixedly connected to the hook base through the connecting ring.

Preferably, a steel cable is fixedly connected to the bottom of the hook base, a gravity sensor is fixedly connected to the middle position of the steel cable, and a hook is fixedly connected to the bottom of the steel cable.

Preferably, a switch panel is fixedly connected to one side of the crane body, a touch induction ring switch and a gravity sensor switch are provided on one side of the switch panel, and the touch induction ring passes through the touch induction ring switch and the gravity sensor. The gravity sensor switches are all electrically connected to the external power supply.

Preferably, the inner diameter of the installed touch sensing ring is pre-entered into the monitoring system of the lifting safety monitoring device itself.

Compared with the prior art, the beneficial effects of the present invention are:

1. The counterweight block can make the traction rope automatically retract when the hook rises and always maintain a tight state, preventing the traction rope from being too loose and hanging on other positions of the crane or on hoisted heavy objects, causing safety accidents. , when the sling follows the crossbar due to wind or excessive swing, the sling will first come into contact with the touch induction ring. The essence of the touch induction ring is a monostable trigger. When the sling is When the swing amplitude is too large, the rope will come into contact with the touch induction ring and transmit a signal. This signal will be transmitted to the crane's own monitoring system and then an alarm will be issued. When the alarm is issued, the crane will be stopped to continue working and the electric pusher in the traction mechanism will be controlled. The rod drives the connecting seat, telescopic mechanism and brushless motor to move in the direction of the second fixed pulley, and finally causes the output end of the brushless motor to conflict with the outer wall of the second fixed pulley. During the collision, the traction rope will be firmly clamped. The brushless motor is then controlled to rotate slowly to tighten the traction rope through the friction generated by the friction with the second fixed pulley. (The rubber layer on the surface of the brushless motor can increase the resistance.) The traction rope will exert additional force on the hook during the tightening process. The force in the direction breaks the original inertial shaking of the hook, allowing the hook and the goods to stop quickly, effectively reducing the safety risks involved. Moreover, when the device is hoisting heavier goods, the risk of lifting heavy objects is greater. Therefore, when lifting heavy objects, the safe swing range of the sling must be controlled smaller. At this time, the two electric lifting rods can be used to drive the touch induction ring to move downward (because the sling at the lower position swings when the sling swings The amplitude will be larger, so it will be easier to contact the touch induction ring, thereby triggering the alarm) When lifting lighter goods, the opposite can be done. Through the above method, the alarm function of the device can be flexibly adjusted, increasing safety. ;

2. Through the telescopic mechanism, when the brushless motor contacts the second fixed pulley, the holding force of the traction rope can be increased to increase the friction force, while effectively reducing the risk of hardware damage caused by excessive hard clamping.

3. This device can automatically adjust the length of the electric lifting rod based on the inner diameter of the touch sensing ring, the static or trigger weight of the item, and the wind force, etc., thereby automatically adapting the appropriate safe swing range for the current item, and thereby obtaining the appropriate trigger alarm degree. Improve the significance of alarms and avoid inadequate safety monitoring.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic structural diagram of position A in Figure 1 of the present invention;

Figure 3 is a schematic diagram of the traction mechanism in the present invention;

Figure 4 is a schematic diagram of the internal structure of the traction mechanism in the present invention;

Figure 5 is a schematic diagram of the internal structure of the telescopic mechanism in the present invention;

Figure 6 is a schematic diagram of the hook structure in the present invention;

Figure 7 is a schematic structural diagram of the touch sensing ring in the present invention.

In the picture: 1. Crane body; 111. Cross bar; 2. Traction mechanism; 3. Outer shell; 4. First fixed pulley; 5. Second fixed pulley; 6. Electric push rod; 7. Connecting seat; 8. Telescopic mechanism; 9. Brushless motor; 10. Rubber layer; 11. Traction rope; 12. Counterweight; 13. Slide; 14. First clamping shaft; 15. Second clamping shaft; 81. Bushing; 82 , telescopic rod; 83, collision plate; 84, spring; 16, electric lifting rod; 17, touch induction ring; 18, sling; 19, hook seat; 20, connecting ring; 21, steel cable; 22, gravity sensor ; 23. Hook.

Implementation

In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the specific embodiments and the accompanying drawings. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. Furthermore, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily confusing the concepts of the present invention.

As shown in Figures 1-6, the present invention proposes a lifting safety monitoring device with an alarm and stop operation function, including a crane body 1. The crane body 1 includes a cross bar 111, and one end of the bottom of the cross bar 111 is fixedly connected to a traction mechanism. 2. The traction mechanism 2 includes an outer casing 3. The top end of the inner wall of the outer casing 3 is engaged with a first fixed pulley 4. The bottom end of the inner wall of the outer casing 3 is engaged with a second fixed pulley 5. One end of the inner wall of the outer casing 3 An electric push rod 6 is fixedly connected. One end of the electric push rod 6 is fixedly connected with a connecting base 7. Both ends of the connecting base 7 are fixedly connected with telescopic mechanisms 8. One ends of the two telescopic mechanisms 8 are engaged with a brushless The motor 9 is pushed by the electric push rod 6 so that the brushless motor 9 and the second fixed pulley 5 clamp the traction rope 11 and rotate the brushless motor 9 to drive the traction rope 11 to pull the hook 23. The surface of the brushless motor 9 is fixed. A rubber layer 10 is connected. The rubber layer 10 can increase the resistance and make the pulling hook 23 of the traction rope 11 smoother. The outer wall of the first fixed pulley 4 is covered with a traction rope 11, and one end of the traction rope 11 is fixedly connected with a counterweight 12 , the gravity of the counterweight 12 keeps the traction rope 11 always in a tight state, preventing the traction rope 11 from loosening and swinging when the hook 23 rises and easily hanging on the crane or other locations, causing safety hazards. One side of the bottom of the crossbar 111 There is a touch induction ring 17 fixedly connected. The touch induction ring 17 is made of metal and uses a monostable circuit for induction;

As shown in Figure 3, the inner walls on both sides of the outer shell 3 are provided with chute 13. The chute 13 and the first clamping shaft 14 can stabilize the moving direction of the brushless motor 9;

As shown in FIG. 4 , first clamping shafts 14 are fixedly connected to both sides of the brushless motor 9 and the connecting base 7 , and the outer walls of the two first clamping shafts 14 are respectively clamped with the inner walls of the two chute 13 . The two sides of the first fixed pulley 4 and the two sides of the second fixed pulley 5 are fixedly connected with the second clamping shaft 15, and the outer wall of the second clamping shaft 15 is connected with the inner wall of the outer shell 3;

As shown in Figure 5, the telescopic mechanism 8 includes a sleeve 81. The telescopic mechanism 8 can increase the friction force on the traction rope 11. A telescopic rod 82 is inserted through the inner wall of the sleeve 81, and one end of the telescopic rod 82 is fixedly connected with a friction plate. 83. One end of the inner wall of the sleeve 81 is fixedly connected with a spring 84, and one end of the spring 84 conflicts with one side of the friction plate 83;

As shown in Figure 6, the bottom end of the crossbar 111 is movable with a sling 18, the bottom end of the sling 18 is engaged with a hook seat 19, one end of the hook seat 19 is fixedly connected with a connecting ring 20, and the traction rope 11 The other end is fixedly connected to the hook base 19 through the connecting ring 20. The bottom of the hook base 19 is fixedly connected to a steel cable 21. The middle position of the steel cable 21 is fixedly connected to a gravity sensor 22. When the items hung by the hook 23 are overweight, they pass through the gravity sensor. The sensor 22 senses and issues an alarm to stop the continued operation, and a hook 23 is fixedly connected to the bottom of the steel cable 21 .

As shown in FIG. 7 , two electric lifting rods 16 are fixedly connected to one side of the bottom end of the crossbar 111 , and the electric lifting rods 16 control the lifting and lowering adjustment of the touch induction ring 17 .

The working principle of the present invention is: when people use this crane to carry out normal heavy object lifting work, the heavy object is hooked by the hook 23, and then the vertical height of the hook 23 and the heavy object is adjusted by adjusting the length of the sling 18 , when the height of the hook 23 is adjusted, the counterweight 12 will be pulled by the traction rope 11 and the action of the first fixed pulley 4 to automatically rise and fall. The counterweight 12 can enable the traction rope 11 to automatically retract when the hook 23 rises. And always maintain a tight state to prevent the traction rope 11 from being too loose and hanging on other positions of the crane or on the hoisted heavy objects, causing safety accidents. When the sling 18 follows the crossbar due to wind or excessive swing range When 111 is shaking, the sling 18 will first come into contact with the touch sensor ring 17. The essence of the touch sensor ring 17 is a monostable trigger. When the sling 18 swings too large, it will contact the touch sensor ring 17. The induction ring 17 contacts and transmits a signal. This signal will be transmitted to the crane's own monitoring system and then an alarm will be issued. When the alarm is issued, the crane will stop to continue working and control the electric push rod 6 in the traction mechanism 2 to drive the connection base 7 and telescopic mechanism 8. And the brushless motor 9 moves in the direction of the second fixed pulley 5 and finally makes the output end of the brushless motor 9 conflict with the outer wall of the second fixed pulley 5. During the collision, the traction rope 11 will be firmly clamped, and then the control The brushless motor 9 rotates slowly and drives the traction rope 11 to tighten through the friction generated by the conflict with the second fixed pulley 5 (the rubber layer 10 on the surface of the brushless motor 9 can increase resistance), and the traction rope 11 will tighten during the tightening process. Applying an extra directional force to the hook 23 breaks the original inertial rocking of the hook 23, allowing the hook 23 and the goods to stop quickly, effectively reducing the safety risks involved and when the device is hoisting heavier goods due to The risk of hoisting heavy objects is greater, so when lifting heavy objects, the safe swing range of the sling 18 must be controlled smaller. At this time, the two electric lifting rods 16 can be used to drive the touch induction ring 17 to move downward (because the sling When the sling 18 swings, the swing amplitude of the sling 18 at the lower position will be larger, so it will be more likely to contact the touch induction ring 17, thereby triggering the alarm) When lifting lighter goods, the opposite can be done. Through the above method, the sling 18 can be The alarm function of the device can be flexibly adjusted to increase safety.

When the brushless motor 9 contacts the second fixed pulley 5 through the telescopic mechanism 8, the clamping force on the traction rope 11 can be increased to increase the friction force, while effectively reducing the risk of hardware damage caused by excessive hard clamping.

As a further improvement of the present invention, the inner diameter of the installed touch induction ring 17 is pre-entered in the monitoring system of the crane itself. When the hook 23 hangs items statically, the static hanging weight data will be obtained through the gravity sensor 22 and also entered into the monitoring system. ; When starting the device for the first time, the length of the electric lifting rod 16 is adjusted to the initial value (the initial value is preset in the system based on work experience). The monitoring system is connected to the local weather data to obtain the wind in real time. During the lifting process, once it is touched The touch sensor ring 17 is triggered, and the wind data, the item trigger weight data and the length data of the electric lift rod 16 are packaged at this time, and are associated with the inner diameter data entered by the touch sensor ring 17, and the item trigger weight data is associated with the item weight data when hanging still. When the difference is within the set value, it means that the hanging of the object is stable. Under the current wind force, the length of the electric lifting rod 16 is too conservative and loses the meaning of the alarm (the alarm is easy to be ignored by the safety officer). The length of the electric lifting rod 16 can be automatically adjusted. Shorten a certain value (the fixed value is also preset in advance. In principle, the fixed value setting is relatively small, reducing the span of each adjustment), and the safe swing range increases. When the difference is outside the set value and within the dangerous value, It means that the hanging of the object is slightly unstable. Under the current wind force, the trigger length of the electric lifting rod 16 is appropriate, has alarm significance, and the safe swing range is appropriate. When the difference is outside the set value and exceeds the dangerous value, it means that the hanging of the object is extremely unstable. Stable, under the current wind force, the triggering length of the electric lifting rod 16 is not appropriate. It is necessary to adjust the length of the electric lifting rod 16 to a certain value to reduce the safe swing range. Based on the above-mentioned continuous data storage, a data model is established for the inner diameter of the touch induction ring 17, the weight of the object, the wind force, etc., and through continuous learning, the electric lifting rod 16 can be quickly and automatically adjusted according to the weight of the hanging object the next time it is used. to the most appropriate length, and the safe swing range is limited to the optimum under the conditions of wind force, the inner diameter of the touch sensing ring 17 and the weight of the object, thereby improving the safety of the device.

It should be understood that the above-described specific embodiments of the present invention are used to illustrate or explain the principles of the present invention, but do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention shall be included in the protection scope of the present invention. Furthermore, it is intended that the appended claims of the present invention cover all changes and modifications that fall within the scope and boundaries of the appended claims, or equivalents of such scopes and boundaries.

Claims (10)

1. A lifting safety monitoring device with an alarm and stop operation function, including a crane body (1), characterized in that: the crane body (1) includes a crossbar (111), and the bottom of the crossbar (111) A traction mechanism (2) is fixedly connected to one end. The traction mechanism (2) includes an outer shell (3). The top end of the inner wall of the outer shell (3) is engaged with a first fixed pulley (4). The outer shell The bottom end of the inner wall of the body (3) is engaged with a second fixed pulley (5). One end of the inner wall of the outer body (3) is fixedly connected with an electric push rod (6). One end of the electric push rod (6) A connecting base (7) is fixedly connected, and telescopic mechanisms (8) are fixedly connected to both ends of one side of the connecting base (7). One ends of the two telescopic mechanisms (8) are engaged with a brushless motor ( 9), the surface of the brushless motor (9) is fixedly connected with a rubber layer (10), the outer wall of the first fixed pulley (4) is covered with a traction rope (11), and the traction rope (11) One end is fixedly connected with a counterweight block (12). 2. A lifting safety monitoring device with an alarm function to stop operations according to claim 1, characterized in that: the inner walls on both sides of the outer shell (3) are provided with chutes (13), and the no Both sides of the brush motor (9) and both sides of the connecting seat (7) are fixedly connected with first clamping shafts (14), and the outer walls of the two first clamping shafts (14) are respectively connected with the two chute (13) The inner wall snap connection. 3. A hoisting safety monitoring device with an alarm and work stop function according to claim 1, characterized in that: both sides of the first fixed pulley (4) and both sides of the second fixed pulley (5) They are all fixedly connected with a second clamping shaft (15), and the outer wall of the second clamping shaft (15) and the inner wall of the outer shell (3) are connected through each other. 4. A lifting safety monitoring device with an alarm function to stop operations according to claim 1, characterized in that: the telescopic mechanism (8) includes a casing (81), and the inner wall of the casing (81) Telescopic rods (82) are interspersed. 5. A hoisting safety monitoring device with an alarm function to stop operations according to claim 4, characterized in that: one end of the telescopic rod (82) is fixedly connected with a conflict plate (83), and the casing (82) 81) One end of the inner wall is fixedly connected with a spring (84), and one end of the spring (84) conflicts with one side of the friction plate (83). 6. A hoisting safety monitoring device with an alarm and work stop function according to claim 1, characterized in that: two electric lifting rods (16) are fixedly connected to one side of the bottom end of the crossbar (111), The bottoms of the two electric lifting rods (16) are jointly provided with a touch induction ring (17). The bottom end of the crossbar (111) is movable with a sling (18). The bottom end of the sling (18) The snap joint is provided with a hook seat (19). 7. A hoisting safety monitoring device with an alarm function to stop operations according to claim 6, characterized in that: one end of the hook seat (19) is fixedly connected with a connecting ring (20), and the traction rope (11) ) is fixedly connected to the hook base (19) through the connecting ring (20). 8. A lifting safety monitoring device with an alarm function to stop operations according to claim 7, characterized in that: a steel cable (21) is fixedly connected to the bottom of the hook seat (19), and the steel cable (21) is fixedly connected to the bottom of the hook base (19). A gravity sensor (22) is fixedly connected to the middle position of 21), and a hook (23) is fixedly connected to the bottom of the steel cable (21). 9. A hoisting safety monitoring device with an alarm and work stop function according to claim 8, characterized in that: a switch panel is fixedly connected to one side of the crane body (1), and one side of the switch panel A touch induction ring switch and a gravity sensor switch are provided, and the touch induction ring (22) is electrically connected to an external power supply through the touch induction ring switch and the gravity sensor (22) through the gravity sensor switch. 10. A lifting safety monitoring device with an alarm and work stop function according to claim 6, characterized in that: the monitoring system of the lifting safety monitoring device itself is pre-recorded with the information of the installed touch induction ring (17). the inside diameter of.