A device for detecting the performance of a crane

Abstract

The utility model relates to the technical fields of crane performance detection, especially relate to a detection device about crane performance, it has the structure of ejecting escape, when the heavy object falls accidentally, trolley one and laser range finder are ejected by ejecting component and are separated, avoid that laser range finder is smashed by heavy object, improve security, including crane body, still include: the heavy object that hangs in the travelling block lifting hook of crane body, the trolley one below heavy object, install laser range finder on trolley one, and one end of trolley one is elastically connected with the portal of crane body through ejecting component, and the other end of trolley one installs the lifting ring, the trolley two on the outside of lifting ring, trolley two is elastically connected with the portal of crane body through another ejecting component, and the lower end of the lever is rotatably connected with trolley two, and the lower end of the lock hook on the lower end lateral wall of trolley two is inserted into the lifting ring, and the lower end of the lock hook is pressed on trolley two when the lever is erected.

Description

Technical Field

[0001] This utility model relates to the technical field of crane performance testing, and in particular to a testing device for crane performance. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also known as an overhead crane, gantry crane, or hoist. Braking distance is one of the important performance indicators for safe operation of cranes. In actual production, it is necessary to periodically test the braking distance of cranes. Existing Chinese utility model patent CN212403250U discloses a crane braking performance testing instrument. This testing device includes a crane, with support columns fixedly connected to both ends of the crane. The bottom end of each support column is fixedly connected to the ground foundation, and a crane control device is fixedly connected to the surface of the support column. The device includes a crane with a load suspended from its hook. A housing is located directly below the load, housing a power supply and a central controller. A laser rangefinder is fixedly connected to the top of the housing, and a wireless transmission module is located on one side of the laser rangefinder, also fixedly connected to the top of the housing. Through the coordinated use of the crane, support column, crane controller, load, housing, power supply, central controller, laser rangefinder, and wireless transmission module, the braking distance of the crane can be detected. Since a laser rangefinder is used for measurement, no complex wiring is required, saving time and effort.

[0003] When a heavy object falls accidentally, the laser rangefinder of the aforementioned detection device only provides passive protection through the fence. The fence will inevitably be damaged, and the laser rangefinder is at high risk of being damaged inside the fence, especially when the weight of the object is very large, resulting in low safety. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a crane performance testing device with an ejection escape structure. When a heavy object falls accidentally, the trolley and the laser rangefinder are ejected by the ejection assembly, preventing the laser rangefinder from being damaged by the heavy object and improving safety.

[0005] This utility model discloses a crane performance testing device, comprising a crane body with a gantry and a traveling crane that travels on the gantry; further comprising: a heavy object suspended on the traveling crane hook of the crane body; a trolley one located below the heavy object, on which a laser rangefinder is mounted, one end of the trolley one being elastically connected to the gantry of the crane body via a launch assembly, and a lifting ring mounted on the other end of the trolley one; a trolley two located outside the lifting ring, which is elastically connected to the gantry of the crane body via another launch assembly; an inclined guide portion is provided at the upper end of a lever, the guide portion of the lever being located below the heavy object, and the lower end of the lever being rotatably connected to the trolley two; and a device is mounted on the lower side wall of the trolley two. Install a locking hook, which is "7" shaped. When the lever is upright, the lower end of the locking hook inserts downward into the lifting ring and presses firmly against trolley two. A certain amount of damping is provided between the lever and trolley two to keep the lever upright. During testing, the load is hung on the crane hook of the crane body. The crane raises the load to its highest point, moves trolley two and trolley one to the middle of the crane body, and uprights the lever so that the locking hook inserts downward into the lifting ring and presses firmly against trolley one. Trolley one is elastically connected to one side of the crane body's gantry via a catapult assembly, and trolley two is elastically connected to the other side of the crane body's gantry via another catapult assembly. At this point, the elastic forces of the two ejection components pull trolley one and trolley two to the sides respectively. Under the pulling force of the lifting ring, the locking hook tilts the lever towards trolley one. At this time, the lower end of the locking hook is blocked by trolley two, thus achieving the locking effect between the lifting ring, lever, locking hook, and trolley two. The controller operates the crane body's trolley to move along the gantry beam of the crane body to above the laser rangefinder and lever. The crane body's trolley releases the drop mechanism, causing the load to begin falling. When the load reaches a uniform falling speed, the controller operates to brake the crane body's trolley. At this time, the laser rangefinder measures the height of the load, obtaining the height value A. When the load stops falling, the laser... The rangefinder measures the height of the load again, obtaining a height value B. The difference between height value A and height value B is the braking distance of the crane body. This is repeated multiple times to obtain the average braking distance, which is used to evaluate the crane's braking performance. When the load accidentally falls, it collides with the guide at the upper end of the lever, causing the lever to tilt away from trolley one. This causes the lever to pull the locking hook out of the lifting ring from bottom to top, thus unlocking trolley two and trolley one. At this time, the elastic force of the two ejection components ejects trolley one and trolley two to the sides of the load, thus preventing the laser rangefinder from being damaged by the load and improving safety.

[0006] Preferably, the ejection assembly includes a tension spring with one end connected to trolley one or trolley two, the other end of the tension spring connected to one end of lifting belt one, and the other end of lifting belt one connected to the gantry of the crane body; the elastic force of the tension spring pulls trolley one or trolley two outward towards the heavy object, and a tension spring with a suitable elastic coefficient is selected to ensure that trolley one is ejected at high speed, and the lifting belt one is set to facilitate connection with the crane body.

[0007] Preferably, the ejection assembly includes an elastic cable with one end connected to trolley one or trolley two, the other end of the elastic cable connected to one end of lifting belt two, and the other end of lifting belt two connected to the gantry of the crane body; the elastic force of the elastic cable pulls trolley one or trolley two outward towards the load, and a tension spring with a suitable elastic coefficient is selected to ensure that trolley one is ejected at high speed, and the lifting belt two is provided for easy connection to the crane body.

[0008] Preferably, it also includes a strapping tensioner, which winds up the end of lifting sling one or lifting sling two, and the strapping tensioner is connected to the crane body via a hook structure; the strapping tensioner is connected to a hook on one side of the gantry of the crane body, the strapping tensioner winds up one end of lifting sling one or lifting sling two, and the strapping tensioner is operated to tighten lifting sling one or lifting sling two, and elastic force is stored by tightening the tension spring or elastic cable of lifting sling one or lifting sling two respectively, which simplifies the operation and makes the connection stable and reliable.

[0009] Preferably, it also includes a limiting seat installed on the ground in the middle of the crane body. The limiting seat is provided with a limiting insertion hole. The limiting pin can be vertically inserted into the trolley one, and the lower end of the limiting pin is inserted into the limiting insertion hole of the limiting seat. After the trolley one and trolley two are connected, the limiting pin is inserted through the trolley one into the limiting insertion hole of the limiting seat. At this time, during the process of elastically connecting the trolley one and trolley two to both sides of the gantry of the crane body by the two ejection components, the trolley one and trolley two will not be displaced by the elastic force of the two ejection components. After the two ejection components are tightened by the elastic force, the limiting pin is pulled out. At this time, the trolley one and trolley two can be ejected under the elastic force of the two ejection components, which improves the reliability of the installation.

[0010] Preferably, it also includes an acceleration sensor installed on the heavy object, which is used to detect the acceleration of the heavy object. The acceleration sensor is electrically connected to the controller of the laser rangefinder. When the heavy object falls, the acceleration sensor detects the acceleration of the heavy object. When the acceleration value of the heavy object stabilizes, the heavy object reaches its maximum falling speed. At this time, the crane body's traveling mechanism begins to brake, and the acceleration value of the heavy object begins to decrease. At this time, the laser rangefinder begins to measure the height of the heavy object to obtain the height value A. When the acceleration of the heavy object decreases to zero, the laser rangefinder measures the height of the heavy object again to obtain the height value B, thereby accurately obtaining the motion state of the heavy object and the timing of distance measurement, and improving the accuracy of crane braking performance detection.

[0011] Preferably, it also includes two air vents symmetrically arranged on both sides of the heavy object, which are used to guide ventilation for the heavy object; the air vents are set in a trapezoidal or other shape with guiding function to achieve a certain rudder surface effect, making the falling process of the heavy object more stable, reducing the shaking of the heavy object, and improving the accuracy of the laser rangefinder in detecting the height of the heavy object.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: When a heavy object falls accidentally, when the heavy object hits the guide part at the upper end of the lever, the lever tilts away from the side of the first trolley, causing the lever to pull the locking hook out of the hanging ring from bottom to top, thereby unlocking the second trolley and the first trolley. At this time, the elastic force of the two ejection components will eject the first trolley and the second trolley to the sides of the heavy object and out of the ground below the heavy object, thereby preventing the laser rangefinder from being damaged by the heavy object and improving safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a front view structural diagram of the present invention; Figure 3 This is a structural diagram of the following components: trolley one, laser rangefinder, ejection assembly, lifting ring, trolley two, lever, and locking hook. Figure 4 This is a structural diagram of the trolley, laser rangefinder, lifting ring, tension spring, lifting strap, and packing strap tensioner, etc. Figure 5 This is a structural diagram of the trolley, lever, locking hook, elastic cable, lifting strap, and packing strap tensioner, etc. Figure 6 It is a structural diagram of the weight, acceleration sensor, and air vent.

[0014] The following are labeled in the attached diagram: 1. Crane body; 2. Heavy object; 3. Trolley 1; 4. Laser rangefinder; 5. Ejector assembly; 6. Lifting ring; 7. Trolley 2; 8. Lever; 9. Locking hook; 10. Tension spring; 11. Lifting sling 1; 12. Elastic cable; 13. Lifting sling 2; 14. Packing strap tensioner; 15. Limit seat; 16. Limit pin; 17. Accelerometer; 18. Air vent. Detailed Implementation

[0015] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0016] Example 1 like Figures 1 to 6 As shown, a crane performance testing device includes a crane body 1 with a gantry and a traveling crane that travels on the gantry; it also includes: a heavy object 2 suspended on the traveling crane hook of the crane body 1; a trolley 3 located below the heavy object 2, on which a laser rangefinder 4 is installed, one end of the trolley 3 being elastically connected to the gantry of the crane body 1 via a catapult assembly 5, and a lifting ring 6 installed at the other end of the trolley 3; a second trolley 7 located outside the lifting ring 6, which is elastically connected to the gantry of the crane body 1 via another catapult assembly 5; and an inclined guide portion provided at the upper end of a lever 8, the guide portion of the lever 8 being located on the heavy object 2. Below, the lower end of the lever 8 is rotatably connected to the trolley 2 7. A locking hook 9 is installed on the lower side wall of the trolley 2 7. The locking hook 9 is in the shape of a "7". When the lever 8 is upright, the lower end of the locking hook 9 is inserted downward into the lifting ring 6, and the lower end of the locking hook 9 is pressed against the trolley 2 7. It also includes a limiting seat 15 installed on the ground in the middle of the crane body 1. The limiting seat 15 is provided with a limiting insertion hole. The limiting pin 16 can be vertically inserted into the trolley 1 3. The lower end of the limiting pin 16 is inserted into the limiting insertion hole of the limiting seat 15. It also includes an acceleration sensor 17 installed on the heavy object 2. The acceleration sensor 17 is used to detect the acceleration of the heavy object 2.

[0017] A certain damping is provided between lever 8 and trolley 2 7 to keep lever 8 in an upright position. During the inspection, the load 2 is hung on the crane hook of the crane body 1. The crane raises the load 2 to its highest position and moves trolley 2 7 and trolley 1 3 to the middle of the crane body 1. Lever 8 is then erected so that the locking hook 9 is inserted into the lifting ring 6 from top to bottom and pressed against trolley 1 3. After trolley 1 3 and trolley 2 7 are connected, the limiting pin 16 is inserted through trolley 1 3 into the limiting socket of the limiting seat 15. Trolley 1 3 is elastically connected to one side of the gantry of the crane body 1 through a catapult assembly 5, and trolley 2 7 is elastically connected to the other side of the gantry of the crane body 1 through another catapult assembly 5. At this time, trolley 1 3 and trolley 2 7 are respectively held in place by the two catapult assemblies 5. During the elastic connection of trolley 2 7 to both sides of the gantry of crane body 1, trolley 1 3 and trolley 2 7 will not be displaced by the elastic force of the two ejector components 5. After the two ejector components 5 are tightened by the elastic force, the limit pin 16 is pulled out. At this time, the elastic force of the two ejector components 5 will tighten trolley 1 3 and trolley 2 7 to both sides respectively. Under the pulling force of the lifting ring 6, the locking hook 9 tilts the lever 8 to the side of trolley 1 3. At this time, the lower end of the locking hook 9 is blocked by trolley 2 7, thereby achieving the locking effect between the lifting ring 6, lever 8, locking hook 9 and trolley 2 7. By operating the controller, the traveling crane of crane body 1 moves along the gantry beam of crane body 1 to above the laser rangefinder 4 and lever 8. The crane body 1 is then operated to release the drop mechanism, causing the heavy object 2 to begin to fall. Accelerometer 17 is electrically connected to the controller of laser rangefinder 4. When the weight 2 falls, accelerometer 17 detects the acceleration of the weight 2. When the acceleration value of the weight 2 stabilizes, the weight 2 reaches its maximum falling speed and falls at a constant speed. At this time, the traveling crane body 1 begins to brake, and the acceleration value of the weight 2 begins to decrease. At this time, laser rangefinder 4 begins to measure the height of the weight 2 and obtains the height value A. When the acceleration of the weight 2 decreases to zero and the weight 2 stops falling, laser rangefinder 4 measures the height of the weight 2 again and obtains the height value B. This accurately obtains the motion state of the weight 2 and the timing of distance measurement, improving the accuracy of crane braking performance detection. The difference between the degree value A and the height value B is the braking distance of the crane body 1. The braking distance is repeatedly tested to obtain the average value of the braking distance. The braking performance of the crane is evaluated by the average value of the braking distance. When the heavy object 2 falls accidentally, when the heavy object 2 hits the guide part at the upper end of the lever 8, the lever 8 tilts away from the side of the trolley 3. This causes the lever 8 to pull the locking hook 9 out of the lifting ring 6 from bottom to top, thereby unlocking the trolley 2 7 and the trolley 3. At this time, the elastic force of the two ejection components 5 ejects the trolley 3 and the trolley 2 7 to the sides of the heavy object 2, thus preventing the laser rangefinder 4 from being damaged by the heavy object 2 and improving safety.

[0018] It also includes two air vents 18 symmetrically arranged on both sides of the weight 2. The two air vents 18 are used to guide the ventilation of the weight 2. The air vents 18 are set into trapezoidal or other shapes with guiding functions to achieve a certain rudder surface effect, making the falling process of the weight 2 more stable, reducing the shaking of the weight 2, and improving the accuracy of the laser rangefinder 4 in detecting the height of the weight 2.

[0019] Example 2 like Figure 3 and Figure 4 As shown, based on Embodiment 1, the ejection assembly 5 includes a tension spring 10 with one end connected to trolley 3 or trolley 7, and the other end of the tension spring 10 connected to one end of the lifting sling 11. The other end of the lifting sling 11 is connected to the gantry of the crane body 1. It also includes a packing strap tensioner 14, which winds up the end of the lifting sling 11. The packing strap tensioner 14 is connected to the crane body 1 through a hook structure.

[0020] Connect the strapping tensioner 14 to the hook on one side of the gantry of the crane body 1. The strapping tensioner 14 winds up one end of the lifting sling 11. Operate the strapping tensioner 14 to tighten the lifting sling 11. The tension spring 10 of the lifting sling 11 provides elastic energy storage, simplifying the operation and ensuring a stable and reliable connection. The elastic force of the tension spring 10 pulls the trolley 3 or trolley 7 towards the outside of the heavy object 2. Select a tension spring 10 with a suitable elastic coefficient to ensure that the trolley 3 is ejected at high speed. The lifting sling 11 facilitates connection with the crane body 1.

[0021] Example 3 like Figure 3 and Figure 5 As shown, based on Embodiment 1, the ejection assembly 5 includes an elastic cable 12 with one end connected to either trolley 1 3 or trolley 2 7, and the other end of the elastic cable 12 connected to one end of the lifting sling 2 13. The other end of the lifting sling 2 13 is connected to the gantry of the crane body 1. It also includes a packing strap tensioner 14, which winds up the end of the lifting sling 2 13. The packing strap tensioner 14 is connected to the crane body 1 via a hook structure.

[0022] Connect the strapping tensioner 14 to the hook on one side of the gantry of the crane body 1. The strapping tensioner 14 winds up one end of the second lifting sling 13. Operate the strapping tensioner 14 to tighten the second lifting sling 13. The elastic cable 12 is tightened by the second lifting sling 13 to store elastic force, which simplifies the operation and ensures a stable and reliable connection. The elastic force of the elastic cable 12 pulls the trolley 1 3 or trolley 2 7 to the outside of the heavy object 2. Select a tension spring 10 with a suitable elastic coefficient to ensure that the trolley 1 3 is ejected at high speed. The second lifting sling 13 is set up to facilitate connection with the crane body 1.

[0023] like Figures 1 to 6As shown, this utility model discloses a crane performance testing device. During operation, the load 2 is first hung on the crane hook of the crane body 1. The crane raises the load 2 to its highest position, and then moves trolley 2 7 and trolley 3 to the middle of the crane body 1. The lever 8 is then erected, causing the locking hook 9 to insert into the lifting ring 6 from top to bottom and press against trolley 3. Trolley 3 is elastically connected to one side of the gantry of the crane body 1 via a launch assembly 5, and trolley 2 7 is connected to the crane body via another launch assembly 5. On the other side of the gantry of crane 1, the elastic force of the two ejection components 5 pulls the trolley 1 3 and trolley 2 7 to both sides respectively. Under the pulling force of the lifting ring 6, the locking hook 9 tilts the lever 8 towards the trolley 1 3. At this time, the lower end of the locking hook 9 is blocked by the trolley 2 7, thus achieving the locking effect between the lifting ring 6, the lever 8, the locking hook 9 and the trolley 2 7. Then, the crane body 1 is operated by the controller to move the traveling crane along the gantry beam of the crane body 1 to above the laser rangefinder 4 and the lever 8. The crane body 1 is then operated. The overhead crane releases its release mechanism, causing the load 2 to begin falling. Then, when the acceleration sensor 17 detects that the load 2 has reached a constant falling speed, the controller activates the crane body 1 to brake. At this time, the laser rangefinder 4 measures the height of the load 2, obtaining height value A. When the acceleration sensor 17 detects that the load 2 has stopped falling, the laser rangefinder 4 measures the height of the load 2 again, obtaining height value B. The difference between height value A and height value B is the braking distance of the crane body 1. This process is repeated multiple times to obtain the braking distance. The average value of the braking distance is used to evaluate the braking performance of the crane. Finally, when the heavy object 2 falls accidentally and collides with the guide part at the upper end of the lever 8, the lever 8 tilts away from the side of the trolley 3, causing the lever 8 to pull the locking hook 9 out of the lifting ring 6 from bottom to top, thereby unlocking the trolley 2 7 and the trolley 3. At this time, the elastic force of the two ejection components 5 will eject the trolley 3 and the trolley 2 7 to the sides of the heavy object 2, thus preventing the laser rangefinder 4 from being damaged by the heavy object 2.

[0024] The main functions achieved by this utility model are: 1. It has an ejection escape structure. When the heavy object 2 falls accidentally, the trolley 3 and the laser rangefinder 4 are ejected by the ejection component 5 to avoid the laser rangefinder 4 being damaged by the heavy object 2, thus improving safety. 2. Elastic force is stored by tightening the tension spring 10 or the elastic cable 12 through the lifting sling 11 or the lifting sling 2 13 respectively, which simplifies the operation and ensures a stable and reliable connection; 3. By detecting the acceleration of the weight 2 through the acceleration sensor 17, the motion state and distance measurement timing of the weight 2 can be accurately obtained, thereby improving the accuracy of crane braking performance detection.

[0025] The crane performance testing device of this utility model uses common mechanical methods for installation, connection, or setting. Any method that can achieve the desired beneficial effect can be implemented. The crane body 1, the load 2, the trolley 1 3, the laser rangefinder 4, the catapult assembly 5, the trolley 2 7, the tension spring 10, the lifting sling 1 11, the elastic cable 12, the lifting sling 2 13, the packing strap tensioner 14, the acceleration sensor 17, and the air vent 18 are all commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative effort from those skilled in the art.

[0026] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] 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 technical principles 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 testing device for crane performance, comprising a crane body (1) equipped with a gantry and a traveling crane that travels on the gantry; characterized in that, Also includes: The heavy object (2) is hung on the crane hook of the crane body (1); A trolley (3) is located below the heavy object (2). A laser rangefinder (4) is installed on the trolley (3). One end of the trolley (3) is elastically connected to the gantry of the crane body (1) through the ejection assembly (5). A lifting ring (6) is installed on the other end of the trolley (3). The second trolley (7) is located outside the lifting ring (6). The second trolley (7) is elastically connected to the gantry of the crane body (1) through another ejector assembly (5). The upper end of the lever (8) is provided with an inclined guide. The guide of the lever (8) is located below the weight (2). The lower end of the lever (8) is rotatably connected to the second trolley (7). A locking hook (9) is installed on the lower side wall of the second trolley (7). The locking hook (9) is in the shape of a "7". When the lever (8) is upright, the lower end of the locking hook (9) is inserted downward into the lifting ring (6) and the lower end of the locking hook (9) is pressed against the second trolley (7).

2. The crane performance testing device as described in claim 1, characterized in that, The ejection assembly (5) includes a tension spring (10) with one end connected to trolley one (3) or trolley two (7), the other end of the tension spring (10) being connected to one end of the lifting belt one (11), and the other end of the lifting belt one (11) being connected to the gantry of the crane body (1).

3. The crane performance testing device as described in claim 1, characterized in that, The ejection assembly (5) includes an elastic cable (12) with one end connected to trolley one (3) or trolley two (7), the other end of the elastic cable (12) being connected to one end of lifting belt two (13), and the other end of lifting belt two (13) being connected to the gantry of the crane body (1).

4. A testing device for crane performance as described in claim 2 or 3, characterized in that, It also includes a packing strap tensioner (14), which winds up the end of either the first (11) or the second (13) of the lifting sling, and the packing strap tensioner (14) is connected to the crane body (1) via a hook structure.

5. The crane performance testing device as described in claim 1, characterized in that, It also includes a limit seat (15) installed on the ground in the middle of the crane body (1). The limit seat (15) is provided with a limit insertion hole. The limit pin (16) can be vertically inserted into the trolley (3) and the lower end of the limit pin (16) is inserted into the limit insertion hole of the limit seat (15).

6. The crane performance testing device as described in claim 1, characterized in that, It also includes an acceleration sensor (17) installed on the weight (2), which is used to detect the acceleration of the weight (2).

7. The crane performance testing device as described in claim 1, characterized in that, It also includes two air guide holes (18) symmetrically arranged on both sides of the weight (2), which are used to guide ventilation of the weight (2).

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