Truck-mounted crane safety protection system of rail operation vehicle

Abstract

The utility model discloses a safety protection system for a truck-mounted crane of a rail operation vehicle, which comprises a data acquisition terminal arranged on a suspension arm, a weighing guide wheel assembly arranged close to the front end of the suspension arm and used for supporting a steel wire lifting rope to slide under stress, and a data receiving box arranged at the position of a cab of the rail operation vehicle, a PLC (Programmable Logic Controller) and a first wireless transmission module are arranged in the data receiving box, and the data acquisition terminal comprises a laser distance measuring sensor, a tilt angle sensor, a torque sensor and a second wireless transmission module which are respectively arranged on a suspension arm; the collection output ends of the laser distance measuring sensor, the tilt angle sensor, the torque sensor and the weighing guide wheel are in communication connection with the PLC through the second wireless transmission module and the first wireless transmission module respectively. According to the utility model, the problem of overwinding of the lifting hook of the truck-mounted crane can be solved, the unnecessary hidden danger of collision is reduced, the operation efficiency of the truck-mounted crane is greatly improved, and the safety and reliability of the use of the truck-mounted crane are ensured.

Description

Technical Field

[0001] This utility model relates to the field of truck-mounted crane technology, and in particular to a safety protection system for a truck-mounted crane on a rail work vehicle. Background Technology

[0002] During track maintenance operations, the following problems frequently occur at the work site: First, after the crane's primary and secondary booms extend, it is easy for the crane to come into contact with the overhead contact line during operation, especially at night. Visually judging the distance between the boom and the contact line is difficult, resulting in low work efficiency and increasing the risk of accidental contact with the contact line, potentially leading to a breakage. Second, during vehicle movement, visual misjudgment can cause the boom to scrape against the contact line support, potentially causing it to break. Third, during lifting operations or hook retrieval, visual misjudgment can cause the wire rope to over-wind, the hook to become stuck at the boom end, preventing the crane from operating and potentially hindering boom retrieval, thus affecting track operation. To better manage the safe operation of track maintenance vehicles equipped with cranes and prevent collisions with the contact line and support, as well as hook over-winding, a safety protection device for crane operations is urgently needed. Utility Model Content

[0003] The purpose of this utility model is to provide a safety protection system for a crane mounted on a rail work vehicle. This crane safety protection system can prevent the crane hook from over-winding and reduce unnecessary collision hazards. It features simple installation, convenient use, and high safety and reliability, greatly improving the operating efficiency of the crane and ensuring its safe and reliable operation. To achieve the above objectives, this utility model adopts the following technical effects:

[0004] According to one aspect of this utility model, a safety protection system for a crane mounted on a rail work vehicle is provided. The crane safety protection system includes a data acquisition terminal mounted on the boom, a weighing guide wheel assembly mounted near the front end of the boom for supporting the sliding of the wire rope under force, and a data receiving box located at the driver's cab of the rail work vehicle. A hook connected to the end of the wire rope is provided below the front end of the boom. A PLC controller and a first wireless transmission module are provided in the data receiving box. The data acquisition terminal includes a laser rangefinder, an inclination sensor, a torque sensor, and a second wireless transmission module, respectively mounted on the boom. The acquisition output terminals of the laser rangefinder, the inclination sensor, the torque sensor, and the weighing guide wheel are respectively connected to the PLC controller via the second wireless transmission module and the first wireless transmission module.

[0005] In a further preferred embodiment of the above scheme, a touch switch for limiting the upward movement of the hook is provided on the front surface of the boom, a connecting ring for connecting to the end of the wire rope is provided at the top of the hook, and a hammer that contacts the touch switch is sleeved on the wire rope between the connecting ring and the front end of the boom 1.

[0006] In a further preferred embodiment of the above scheme, a connecting bracket is provided at the top of the hammer, and a hanging ring is provided at the contact end of the touch switch. The upper end of the connecting bracket is suspended on the connecting ring, and the lower end of the connecting bracket is connected to the top of the hammer.

[0007] In a further preferred embodiment of the above scheme, the weighing guide wheel assembly includes an upper guide pulley, a first lower guide pulley, a second lower guide pulley, and a weighing sensor. The first and second lower guide pulleys are horizontally mounted on the boom from one end of the boom towards the front end. An upper guide pulley for compressing and restricting the wire rope is provided above the first and second lower guide pulleys. The second lower guide pulley is mounted on the boom via the weighing sensor. The output end of the weighing sensor is connected to a second wireless transmission module in sequence via wires.

[0008] In a further preferred embodiment of the above scheme, the central support shaft of the second lower guide pulley is disposed on the load cell, and the support housing of the load cell is fixed to the boom by bolts.

[0009] In a further preferred embodiment of the above scheme, a sliding hole is vertically provided at the eccentric position of the hammer, and the steel wire rope passes vertically through the sliding hole inside the hammer.

[0010] In a further preferred embodiment of the above scheme, the weighing sensor is equipped with a weighing transmitter at its acquisition output terminal, and the weighing transmitter is connected to the second wireless transmission module via a wire.

[0011] In a further preferred embodiment of the above scheme, the truck-mounted crane safety protection system includes an alarm installed on the top of the data receiving box, a touch screen and multiple control buttons and switches installed on the surface of the data receiving box, and the alarm, touch screen and multiple control buttons and switches are respectively connected to the PLC controller.

[0012] In summary, this utility model adopts the above-described technical solution and has the following technical effects:

[0013] (1) This utility model can accurately determine the distance between the boom and the obstacle, the angle of the boom, the torque sensor and other related parameters. When the distance exceeds the set value, an alarm is triggered by the alarm device. The operation parameters in front of the boom can be displayed in real time through the touch screen, accurately determine the boom retraction operation, ensure the safety of the crane on the rail work vehicle, and prevent the crane from scraping against the contact wire and support. It can be used for the safety protection operation of the crane on the rail work vehicle, which is convenient for the crane to use and safe and controllable.

[0014] (2) This utility model measures the pressure generated by the guide pulley (weighing pulley) by installing a weighing sensor on the boom, and finally obtains the weight of the load lifted by the wire rope. It can also prevent the over-winding of the crane hook, reduce unnecessary collision hazards, and has the characteristics of simple installation, convenient use, safety and reliability, and wide applicability. It greatly improves the operating efficiency of the crane and ensures the safety of the crane. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a safety protection system for a crane mounted on a rail work vehicle according to this utility model;

[0016] Figure 2 This is a control principle diagram of the data acquisition terminal and the data receiving box of this utility model;

[0017] In the attached diagram, the components are: boom 1, wire rope 2, weighing guide wheel assembly 3, hook 4, data acquisition terminal 10, data receiving box 20, alarm 21, touch screen 22, control button switch 23, upper guide pulley 30, first lower guide pulley 31, second lower guide pulley 32, load cell 33, touch switch 40, connecting ring 41, hammer 42, connecting bracket 43, lifting ring 44, and sliding hole 42a. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided with reference to the accompanying drawings and preferred embodiments. However, it should be noted that many details listed in the specification are merely to provide the reader with a thorough understanding of one or more aspects of this utility model, and these aspects can be achieved even without these specific details.

[0019] Example 1, combined with Figure 1 and Figure 2As shown, a safety protection system for a crane mounted on a rail work vehicle according to this utility model includes a data acquisition terminal 10 mounted on the boom 1, a weighing guide wheel assembly 3 mounted near the front end of the boom 1 for supporting the sliding of the wire rope 2 under force, and a data receiving box 20 located at the driver's cab of the rail work vehicle. A hook 4 connected to the end of the wire rope 2 is located below the front end of the boom 1. A PLC controller and a first wireless transmission module are installed inside the data receiving box 20. The data acquisition terminal 10 includes a laser rangefinder, a tilt sensor, a torque sensor, and a second wireless transmission module respectively mounted on the boom 1. The acquisition output terminals of the distance sensor, tilt sensor, torque sensor, and weighing guide wheel are respectively connected to the PLC controller via the second wireless transmission module and the first wireless transmission module. In this utility model, the truck crane safety protection system also includes an alarm 21 set on the top of the data receiving box 20, a touch screen 22 set on the surface of the data receiving box 20, and multiple control button switches 23. The alarm 21, touch screen 22, and multiple control button switches 23 are respectively connected to the PLC controller. The control button switches 23 have buttons for start, stop, reset, extension, and retraction. In this invention, firstly, the maximum lifting height of the truck-mounted crane during operation is set via the touch screen 22, while simultaneously viewing real-time data of the boom 1 during operation, thus achieving human-machine interaction; the PLC controller acquires safety protection signals detected by various sensors during the operation of the truck-mounted crane in real time, and measures the lifting height of the truck-mounted crane in real time via a laser rangefinder. When the foremost end of the truck-mounted crane approaches the contact wire, the alarm 21 sounds a buzzer, cuts off the main oil inlet pipe of the hydraulic cylinder driving the lifting and lowering action of the boom 1, and stops the boom lifting and extension actions; secondly, the truck-mounted crane's... The system monitors the crane's position and ensures that it does not exceed the clearance limits when the work vehicle is in motion; otherwise, it will sound an alarm and stop the work vehicle. It also checks the crane's hook retraction status, sounding an alarm when the hook is about to reach the overwind position, cutting off the main hydraulic inlet pipe, and stopping the crane's hook retraction. Finally, during crane operation, it measures the load in real-time by converting the force on the wire rope 2 into the load weight. If the load weight exceeds the allowable load at the current luffing and boom extension positions, it will sound an alarm, cut off the main hydraulic inlet pipe, and stop boom raising, boom extension, and hook retraction.

[0020] In this utility model, such as Figure 1As shown, a touch switch 40 for limiting the upward movement of the hook 4 is provided on the front surface of the boom 1. A connecting ring 41 connected to the end of the wire rope 2 is provided at the top of the hook 4. A hammer 42 that contacts the touch switch 40 is sleeved on the wire rope 2 between the connecting ring 41 and the front end of the boom 1. A connecting bracket 43 is provided at the top of the hammer 42. A lifting ring 44 is provided at the contact end of the touch switch 40. The upper end of the connecting bracket 43 is suspended on the connecting ring 41, and the lower end of the connecting bracket 43 is connected to the top of the hammer 42. The hammer 42 is positioned vertically at an eccentric position. A sliding hole 42a is provided, and the steel wire rope 2 passes vertically through the sliding hole 42a inside the hammer 42. The hammer 42 is suspended on the ring 44 by a connecting hanger 43. The connecting hanger 43 can be a soft rope, a steel wire rope, or a sliding rod. When a sliding rod is used, when the hammer 42 moves upward, it can drive the sliding rod to move upward on the ring 44, so that the sliding rod can contact the touch switch 40, cut off the power supply for the movement of the steel wire rope 2, and prevent the hook 4 from moving upward. When a soft rope or a steel wire rope is used, the top of the hammer 42 contacts the touch switch 40, cut off the power supply for the movement of the steel wire rope 2, and prevent the hook 4 from moving upward. A touch switch 40 is installed at the front end of the crane boom 1, directly above the hook 4. When the winch starts and pulls the wire rope 2, the hook 4 is pulled upward by the pulley block 6 at the front end of the boom 1 and the movable pulley 5 on the hook 4. During the lifting of the heavy object, the wire rope 2 moves through the sliding hole 42a of the hammer 42. When the hook 1 moves upward and approaches the hammer 42, the connecting ring 41 at its top touches the hammer 42, causing the hammer 42 to slide upward along the wire rope 2. During the upward sliding of the hammer 42, the connecting bracket 43 moves inward within the lifting ring 44. When the crane hook rises and is about to reach the overwind position, it contacts the touch switch 40, triggering the alarm 21 to sound an alarm and stopping the crane operation. At the same time, the crane lifting limit is set according to the contact height limit data of the track to which the rail work vehicle is assigned. During the operation of the crane, the PLC controller collects data on the boom lifting angle and extension length in real time. When the real-time lifting height of the boom tip approaches the limit set by the system, an alarm will sound, the main oil inlet pipe will be cut off, the boom lifting and extension actions will be stopped, and the crane operation will be stopped.

[0021] Combination Figure 1 and Figure 2As shown, the weighing guide wheel assembly 3 includes an upper guide pulley 30, a first lower guide pulley 31, a second lower guide pulley 32, and a weighing sensor 33. The first lower guide pulley 31 and the second lower guide pulley 32 are horizontally mounted on the boom 1 from the rear end to the front end. An upper guide pulley 30 is positioned above the first lower guide pulley 31 and the second lower guide pulley 32 to compress and restrict the wire rope 2. The second lower guide pulley 32 is mounted on the boom 1 via the weighing sensor 33. The output end of the weighing sensor 33 is connected to a second wireless transmission module via a wire. A weighing transmitter is installed at the acquisition output end of the weighing sensor 33. The weighing transmitter is connected to the second wireless transmission module via a wire. The second wireless transmission module transmits the pressure exerted on the wire rope 2 during operation to the PLC controller. The central support shaft of the second lower guide pulley 32 is mounted on the weighing sensor 33. The supporting housing of the load cell 33 is fixed to the boom 1 by bolts. When the wire rope 2 moves between the upper guide pulley 30, the first lower guide pulley 31, and the second lower guide pulley 32 of the weighing guide wheel assembly 3, the weight lifted by the hook 4 is subjected to pressure on the second lower guide pulley 32. The load cell 33 on the second lower guide pulley 32 measures the pressure signal on the second lower guide pulley 32. The pressure signal output by the load cell 33 is sent to the weighing transmitter. The weighing transmitter converts the pressure signal into a current signal and sends it to the PLC controller through the second wireless transmission module for analysis and calculation to obtain the pressure value collected by the load cell 33. For this purpose, a load cell 34 is installed on the boom of the truck crane. Based on the extension length and lifting angle of the boom 1 and the preset real-time lifting weight limit, the load cell 34 compares the pressure value of the measured weight with the weight limit value. If the measured weight value is close to the lifting weight limit, an alarm is issued and the operation is stopped.

[0022] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A safety protection system for a crane mounted on a rail-operated vehicle, characterized in that: The truck-mounted crane safety protection system includes a data acquisition terminal mounted on the boom, a weighing guide wheel assembly mounted near the front end of the boom to support the sliding of the wire rope under force, and a data receiving box located at the driver's cab of the railcar. A hook connected to the end of the wire rope is located below the front end of the boom. A PLC controller and a first wireless transmission module are installed inside the data receiving box. The data acquisition terminal includes a laser rangefinder, an inclination sensor, a torque sensor, and a second wireless transmission module, all mounted on the boom. The acquisition output terminals of the laser rangefinder, inclination sensor, torque sensor, and weighing guide wheel are respectively connected to the PLC controller via the second wireless transmission module and the first wireless transmission module.

2. The safety protection system for a crane mounted on a rail work vehicle according to claim 1, characterized in that: A touch switch for limiting the upward movement of the hook is provided on the front surface of the boom. A connecting ring for connecting to the end of the wire rope is provided at the top of the hook. A hammer that contacts the touch switch is sleeved on the wire rope between the connecting ring and the front end of the boom.

3. The safety protection system for a crane mounted on a rail work vehicle according to claim 2, characterized in that: A connecting bracket is provided at the top of the hammer, and a hanging ring is provided at the contact end of the touch switch. The upper end of the connecting bracket is suspended on the connecting ring, and the lower end of the connecting bracket is connected to the top of the hammer.

4. The safety protection system for a crane mounted on a rail work vehicle according to claim 1, characterized in that: The weighing guide wheel assembly includes an upper guide pulley, a first lower guide pulley, a second lower guide pulley, and a weighing sensor. The first and second lower guide pulleys are horizontally mounted on the boom from one rear end to the front end. An upper guide pulley for compressing and restricting the wire rope is provided above the first and second lower guide pulleys. The second lower guide pulley is mounted on the boom via the weighing sensor. The output end of the weighing sensor is connected to a second wireless transmission module in sequence via wires.

5. The safety protection system for a crane mounted on a rail work vehicle according to claim 4, characterized in that: The central support shaft of the second lower guide pulley is mounted on the load cell, and the support housing of the load cell is fixed to the boom by bolts.

6. A safety protection system for a crane mounted on a rail work vehicle according to claim 2 or 3, characterized in that: A sliding hole is vertically installed at the eccentric position of the hammer, and the steel wire rope passes vertically through the sliding hole inside the hammer.

7. A safety protection system for a crane mounted on a rail work vehicle according to claim 4 or 5, characterized in that: The weighing sensor is equipped with a weighing transmitter at its data acquisition output terminal, and the weighing transmitter is connected to the second wireless transmission module via a wire.

8. A safety protection system for a crane mounted on a rail work vehicle according to any one of claims 1-5, characterized in that: The truck-mounted crane safety protection system includes an alarm installed on the top of the data receiving box, a touch screen and multiple control buttons and switches installed on the surface of the data receiving box, and the alarm, touch screen and multiple control buttons and switches are respectively connected to the PLC controller.

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