CN210620026U - Grab crane with cantilever type weighing device - Google Patents
Grab crane with cantilever type weighing device Download PDFInfo
- Publication number
- CN210620026U CN210620026U CN201920907189.0U CN201920907189U CN210620026U CN 210620026 U CN210620026 U CN 210620026U CN 201920907189 U CN201920907189 U CN 201920907189U CN 210620026 U CN210620026 U CN 210620026U
- Authority
- CN
- China
- Prior art keywords
- wire rope
- steel wire
- speed reducer
- cantilever type
- weighing device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a grab crane with a cantilever type weighing device, which comprises a trolley frame, a steel wire rope reel, a speed reducer and a cantilever type stress sensor; the wire rope reel is rotatably arranged on the trolley frame; the speed reducer is hung at one end of the steel wire rope reel, and an output shaft of the speed reducer is coaxially connected with the steel wire rope reel; the cantilever type stress sensor is arranged between the speed reducer and the trolley frame; a steel wire rope is wound on the steel wire rope winding drum, and a hydraulic grab bucket is suspended at the bottom end of the steel wire rope; the torque generated by the steel wire rope and the hydraulic grab bucket acting on the steel wire rope reel is transmitted to the cantilever type stress sensor through the speed reducer. The utility model has the advantages that: its weighing device simple structure, reasonable, low in manufacturing cost, the precision of weighing is high moreover, and it not only can solve the problem that rubbish grab bucket hoist accurate was weighed, and the installation and debugging are convenient, can also satisfy domestic waste incineration power plant measurement accuracy and the stable requirement of operation.
Description
Technical Field
The utility model relates to a measuring equipment, especially a grab bucket crane with cantilever type weighing device.
Background
At present, along with the acceleration of the national urbanization process, the promotion of the municipal refuse volume, the garbage grab crane is one of the core devices of the waste incineration power plant, and the grab crane demand used by the waste incineration power plant is continuously increased. The automation degree of the garbage grab crane and the control requirement of the garbage incineration amount are continuously increased, along with the continuous improvement of the operation management level of the household garbage incineration power plant, the weighing and metering precision of the garbage grab crane is continuously improved to be less than or equal to 1.5 percent or even less than or equal to 1 percent from about 3 percent of the original value. The precision of the traditional overload limiting system technology is only 5%, the requirement of the metering precision in the field cannot be met, and in order to improve the weighing metering precision, some enterprises adopt a multi-point arrangement sensor and a double-layer trolley mode on the premise of the existing technical thought, and weigh by using various power taking modes and an accumulative calculation method at the wheel position, so that the actual effect is not ideal.
Chinese patent (CN 201605105U) discloses a grab bucket crane with high precision weighing. The sensor adopted by the grab crane is a cantilever sensor, the sensor is arranged between a trolley end beam and a wheel box, and the wheel box freely rotates around a hinged shaft. Because the sensor installation position is far away from the steel wire rope reel, and four-point force taking is adopted, dynamic vibration factors caused by additional moment and unpredictable vibration are more, weighing precision is seriously influenced, and the actual application effect is not good.
Chinese patent (CN 203112357U) discloses a weighing device for a double-beam bridge type grab crane. This weighing device has announced the principle of weighing, and weighing device's theory of operation is: when the grab bucket crane picks a heavy object and lifts the heavy object to transfer to the transportation process, the band-type brake belongs to a tightly-holding state, 1/2 of the weight of the lifted heavy object is borne by two ends of the lifting drum, the lifted load is detected by a resistance strain type weighing sensor, a voltage signal which is generated by the pressure of the sensor and is proportional to the load is amplified by a signal amplifier and then is transmitted to a weighing display to be converted into a number to display the lifted weight, so that the error of the lifted weight of the grab bucket is controlled within 5% in the loading and transporting process, the symmetrical weight structure is not discussed and involved, and the weighing precision can not reach the precision value required in the current field, so the grab bucket crane has no practical application significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a grab bucket crane with cantilever type weighing device according to above-mentioned prior art not enough, through adopting cantilever type weighing device and not receiving the accurate weighing of grab bucket by the biography power route of additional moment influence.
The utility model discloses the purpose is realized accomplishing by following technical scheme:
a grab crane with a cantilever type weighing device comprises a trolley frame, a steel wire rope reel, a speed reducer and a cantilever type stress sensor; the wire rope reel is rotatably arranged on the trolley frame; the speed reducer is hung at one end of the steel wire rope winding drum, and an output shaft of the speed reducer is coaxially connected with the steel wire rope winding drum; the cantilever type stress sensor is arranged between the speed reducer and the trolley frame; a steel wire rope is wound on the steel wire rope winding drum, and a hydraulic grab bucket is suspended at the bottom end of the steel wire rope; and the steel wire rope and the torque generated by the hydraulic grab bucket acting on the steel wire rope reel are transmitted to the cantilever type stress sensor through the speed reducer.
The input end of the speed reducer is connected with the motor through a universal transmission shaft.
The trolley frame is provided with a sensor base, and the cantilever type stress sensor is installed on the sensor base.
The speed reducer is provided with an adjustable connecting rod, and an adjusting rod is arranged on the adjustable connecting rod; one end of the adjusting rod is in contact with the stress point of the cantilever type stress sensor.
One end of the adjusting rod, which is in contact with the stress point, is a spherical surface, and the adjusting rod is connected with the adjustable connecting rod through a thread pair; the thread pair is used for adjusting the distance between the adjusting rod and the stress point, so that the adjusting rod is tightly attached to the stress point.
The cantilever type stress sensor is connected with the weighing display instrument through a signal wire.
The trolley frame is provided with two bearing seats, and two ends of the steel wire rope winding drum are respectively installed on the bearing seats.
And a safety connecting piece is connected between the speed reducer and the trolley frame.
The utility model has the advantages that: (1) the force is obtained through the moment, the structure is simple, and the weighing precision is high. Tests prove that the error of the metering precision is less than or equal to 1 percent, and the stable value is less than or equal to 1.5 percent; (2) the weighing weight can be displayed in real time under the support of software, and the weight of the fed garbage of each hopper (each time) can be collected, and the garbage is accumulated in shift and month, recorded, counted, stored and printed.
Drawings
FIG. 1 is a side view of a grapple crane having a cantilevered weighing device;
FIG. 2 is a top view of a grapple crane having a cantilevered weighing device;
fig. 3 is a partially enlarged view of a mounting structure of the cantilever type stress sensor.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art:
as shown in fig. 1-3, the labels 1-15 are respectively shown as: the device comprises a motor 1, a speed reducer 2, a universal transmission shaft 3, a steel wire rope reel 4, a bearing seat 5, a steel wire rope 6, a hydraulic grab bucket 7, a cantilever type stress sensor 8, an adjustable connecting rod 9, an adjusting rod 10, a sensor base 11, a safety connecting piece 12, a pin shaft 13, a trolley frame 14 and a signal wire 15.
Example (b): as shown in fig. 1 to 3, the present embodiment includes a grab crane with a cantilever-type weighing device, which includes a trolley frame 14, a wire rope reel 4, a speed reducer 2, and a cantilever-type stress sensor 8; two ends of the wire rope reel 4 are arranged on the trolley frame 14 through bearing seats 5; the speed reducer 2 is hung at one end of the steel wire rope reel 4, and an output shaft of the speed reducer 2 is coaxially connected with the steel wire rope reel 4. The cantilever type stress sensor 8 is arranged between the speed reducer 2 and the trolley frame 14; a steel wire rope 6 is wound on the steel wire rope reel 4, and a hydraulic grab bucket 7 is suspended at the bottom end of the steel wire rope 6.
The speed reducer 2 is arranged in a suspended mode, and fixing devices such as foundation bolts are not arranged between the speed reducer 2 and the trolley frame 14, so that the speed reducer 2 can transmit the torque of the steel wire rope reel 4 to the cantilever type stress sensor 8. The torque generated by the steel wire rope 6 and the hydraulic grab bucket 7 acting on the steel wire rope reel 4 is transmitted to the cantilever type stress sensor 8 through the speed reducer 2, and the total weight of the hydraulic grab bucket 7 and the loaded materials can be calculated according to the torque measured by the cantilever type stress sensor 8 and the sizes of the speed reducer 2 and the steel wire rope reel 4. The torque transmission path has no additional torque, so that the measurement result is more accurate.
Because the speed reducer 2 is arranged in a suspended manner, in order to ensure safety, a safety connecting piece 12 is arranged between the speed reducer 2 and the trolley frame 14, the safety connecting piece 12 is of a flexible chain structure, and two ends of the safety connecting piece are respectively connected with the speed reducer 2 and the trolley frame 14 through pin shafts 13. The safety link 12 is in a relaxed state and is not stressed in the normal state. When the speed reducer 2 and the wire rope reel 4 are disconnected due to accidents, the safety connecting piece 12 can prevent the speed reducer 2 from falling.
Specifically, the motor 1 is connected with an input shaft of the speed reducer 2 through the universal transmission shaft 3, and the speed reducer 2 is coaxially and fixedly connected with the steel wire rope reel 4, so that the torque output by the speed reducer 2 can drive the steel wire rope reel 4 to rotate. Two ends of the wire rope reel 4 are installed on the trolley frame 14 through two bearing seats 5, and the wire rope reel 4 can rotate freely under the driving of the speed reducer 2. The steel wire rope 6 is wound on the steel wire rope reel 4, and the bottom end of the steel wire rope 6 is connected with the hydraulic grab bucket 7 through a shackle (or a hanging ring). Specifically, two lifting rings are arranged at the top end of the hydraulic grab bucket 7, and the steel wire rope 6 is connected with the lifting rings through shackles.
The trolley frame 14 is fixedly provided with a sensor base 11, and the cantilever type stress sensor 8 is installed on the sensor base 11 through a fixing bolt. One end of the adjustable connecting rod 9 is connected with the shell of the speed reducer 2 through a bolt, the other end of the adjustable connecting rod is provided with an adjusting rod 10, and the adjusting rod 10 is used for keeping contact with a stress point of the cantilever type stress sensor 8.
One end of the adjusting rod 10, which is contacted with the stress point of the cantilever type stress sensor 8, is a spherical surface, and the adjusting rod 10 is connected with the adjustable connecting rod 9 through a thread pair. The screw thread pair is used for adjusting the distance between the adjusting rod 10 and the stress point, so that the adjusting rod 10 is tightly attached to the stress point, and positive pressure is formed on the stress point, so that the speed reducer 2 transmits torque to the cantilever type stress sensor 8.
The total weight of the hydraulic grab bucket 7, the moment generated by the force arm of the steel wire rope reel 4 (the radius of the steel wire rope reel 4), the force acting on the cantilever type stress sensor 8 and the moment generated by the force arm (the distance from the stress point of the sensor to the center of the reel) are equal in magnitude and opposite in direction. The force acting on the cantilever type stress sensor 8 and the total weight (gravity) of the hydraulic grab bucket 7 are in a linear relation, and the linear constant value of the linear relation is the ratio of the radius of the steel wire rope reel 4 to the center distance from the stress point of the cantilever type stress sensor 8 to the steel wire rope reel 4. The adjustable connecting rod 9 transmits the moment to the cantilever type stress sensor 8, and the cantilever type stress sensor 8 transmits the measurement result to a weighing display instrument installed in a control room (or a cab) through a signal wire 15, wherein the weighing display instrument comprises a crane controller or an electronic display instrument. In addition, the measurement results of the cantilevered stress sensor 8 may be uploaded to the control room (or cab) through the bus. In the process, the data transmission is reliable and stable, and the cost is low.
The cantilever type stress sensor 8 adopts a torque force taking mode, the gravity (weight) borne by the steel wire rope 6 is transmitted to the speed reducer 2 in a linear proportion, the adjustable connecting rod 9 on the speed reducer 2 transmits the torque to the cantilever type stress sensor 8, and a detection result is transmitted to a crane electronic display instrument or a display panel arranged in a control room (or a cab) through a signal line.
Because the total pulling force F (generally equal to the sum of the self weight of the hydraulic grab 7, the weight of the material grabbed by the hydraulic grab 7 and the weight of the steel wire rope 6) borne by the steel wire rope 6 acts on the steel wire rope reel 4, a torque M is generated, and at this time, the pressure value = M/L (L is a force arm, and the distance between the stress point of the cantilever type stress sensor 8 and the center of the steel wire rope reel 4) borne by the cantilever type stress sensor 8. From the above analysis, the total tensile force F borne by the steel wire rope 6 can be obtained from the measurement result of the cantilever type stress sensor 8 and various inherent dimensional data, and the actual weight of the material grabbed by the hydraulic grab bucket 7 can be obtained by combining the self weight of the steel wire rope 6 and the self weight of the hydraulic grab bucket 7. The brake device is arranged at the output shaft of the speed reducer 2, the speed reducer 2 is in a static state by using the brake device in the measuring process, the motor 1 is in a stalling state at the moment, and the universal transmission shaft 3 cannot output torque to the speed reducer 2.
In the process of embodying this embodiment, various parameters need to be determined. In the process of determining the parameters, the maximum pressure value born by the cantilever type stress sensor 8 can be determined according to the parameters such as the size of the speed reducer 2, the self weight of the hydraulic grab bucket 7, the grabbing capacity and the like, and the maximum pressure value can be converted to obtain the main parameter basis of the pressure grade of the cantilever type stress sensor 8 as the matched and selected sensor. When the crane carrying out different lifting loads selects the weighing sensor, the parameters of the set sensor can be preselected, and the numerical value of the force arm L is calculated according to the maximum weight (dead weight and the weight of the grabbed garbage) of the grab bucket, the diameter of the winding drum and the like.
Along with the implementation and positive promotion of the national environmental protection strategy, the garbage incineration power generation has comprehensively replaced the landfill, the application and the automation/semi-automation requirement of the garbage grab crane as the core equipment of the household garbage incineration power plant are higher and higher, the accurate weighing is very important for the settlement requirement, the design technology of the weighing device in the embodiment has great beneficial effects on the technical promotion in the field as the important component part of the garbage grab crane: compared with the garbage grab bucket crane weighing device widely applied in China at present, the weighing system adopts the cantilever type stress sensor 8 as a measuring element, and the force is taken through the moment and is arranged at the near end of the winding drum, so that the metering precision can be effectively improved. Tests prove that the error of the metering precision is less than or equal to 1 percent, and the stable value is less than or equal to 1.5 percent. In the measuring process, the weight of the fed garbage of each hopper (each time) needs to be collected, and the shift accumulation, the week accumulation, the month accumulation and the year accumulation are carried out, and the precision requirement error value is less than or equal to 1 percent, so that the force taking form of the cantilever type stress sensor torque is adopted, the structural form is convenient to install and debug, and the force taking is accurate.
Although the present invention has been described in detail with reference to the drawings, those skilled in the art will recognize that various changes and modifications can be made without departing from the scope of the invention as defined in the appended claims, and therefore they are not to be considered in a repeated detail herein.
Claims (8)
1. A grab crane with a cantilever type weighing device is characterized by comprising a trolley frame, a steel wire rope reel, a speed reducer and a cantilever type stress sensor; the wire rope reel is rotatably arranged on the trolley frame; the speed reducer is hung at one end of the steel wire rope winding drum, and an output shaft of the speed reducer is coaxially connected with the steel wire rope winding drum; the cantilever type stress sensor is arranged between the speed reducer and the trolley frame; a steel wire rope is wound on the steel wire rope winding drum, and a hydraulic grab bucket is suspended at the bottom end of the steel wire rope; and the steel wire rope and the torque generated by the hydraulic grab bucket acting on the steel wire rope reel are transmitted to the cantilever type stress sensor through the speed reducer.
2. The grab crane with cantilever weighing device of claim 1, wherein the input end of the speed reducer is connected with the motor through a universal transmission shaft.
3. The grab crane with cantilevered weighing device of claim 1, wherein a sensor mount is provided on the trolley frame, the cantilevered stress sensor being mounted on the sensor mount.
4. The grab crane with the cantilever type weighing device according to claim 1, wherein the speed reducer is provided with an adjustable connecting rod, and the adjustable connecting rod is provided with an adjusting rod; one end of the adjusting rod is in contact with the stress point of the cantilever type stress sensor.
5. The grab crane with the cantilever type weighing device of claim 4, wherein one end of the adjusting rod contacting the stress point is a spherical surface, and the adjusting rod is connected with the adjustable connecting rod through a thread pair; the thread pair is used for adjusting the distance between the adjusting rod and the stress point, so that the adjusting rod is tightly attached to the stress point.
6. The grab crane with cantilever weighing device of claim 1, in which the cantilever stress sensor is connected with the weighing display instrument through a signal line.
7. The grab crane with cantilever weighing device of claim 1, wherein the trolley frame is provided with two bearing seats, and two ends of the wire rope reel are respectively mounted on the bearing seats.
8. The grab crane with cantilever weighing device of claim 1, wherein a safety connection is connected between the reducer and the trolley frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920907189.0U CN210620026U (en) | 2019-06-17 | 2019-06-17 | Grab crane with cantilever type weighing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920907189.0U CN210620026U (en) | 2019-06-17 | 2019-06-17 | Grab crane with cantilever type weighing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210620026U true CN210620026U (en) | 2020-05-26 |
Family
ID=70764013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920907189.0U Active CN210620026U (en) | 2019-06-17 | 2019-06-17 | Grab crane with cantilever type weighing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210620026U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112173977A (en) * | 2020-09-29 | 2021-01-05 | 闽江学院 | Hoisting structure for double-door crane |
-
2019
- 2019-06-17 CN CN201920907189.0U patent/CN210620026U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112173977A (en) * | 2020-09-29 | 2021-01-05 | 闽江学院 | Hoisting structure for double-door crane |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201058788Y (en) | Bridge crane electronic scale steel cable weight compensating unit | |
| CN210620026U (en) | Grab crane with cantilever type weighing device | |
| CN2868968Y (en) | Hook capable of weighing | |
| CN201694705U (en) | Overload protecting and weighing protector of construction lifter | |
| CN205941011U (en) | Test table loading device is examined to fork truck performance | |
| CN103950836A (en) | Electronic scale for travelling crane | |
| CN210313180U (en) | Grab crane with accurate weighing device | |
| CN206407830U (en) | A kind of electro-hydraulic gripping apparatus crane safety weighing device | |
| CN101244790B (en) | Mechanical weighing mechanism of gantry crane dynamic grab bucket electronic weighing scale | |
| CN2297430Y (en) | Crane electronic hook with load-measuring device | |
| CN213011623U (en) | Grab crane with accurate weighing device | |
| CN1887679A (en) | Weighing hook | |
| CN214455132U (en) | Bucket wheel workload detection device in stacker-reclaimer | |
| CN201458586U (en) | Novel crane | |
| CN209940222U (en) | Elevator car weighing system | |
| CN110940406B (en) | Electronic truck scale weighing system based on Internet of things technology and lightning protection method | |
| CN201415917Y (en) | Garbage sling van with single winding drum | |
| CN210825151U (en) | Moment device based on accurate weighing of crane | |
| CN2286744Y (en) | Automatic frequency-changing speed-regulating driver for crane hook | |
| CN213976681U (en) | Moment transmission structure for accurate weighing | |
| CN203112357U (en) | Double-beam-bridge-type grab crane load weighing device | |
| CN2288956Y (en) | Metering Installation of elevating capacity for truck crane | |
| CN201626777U (en) | Comprehensive safety protection device of hoisting equipment | |
| CN2306978Y (en) | Electronic scale sensor device for crane | |
| CN212931591U (en) | Special electronic scale is hung to rubbish convenient to change |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |