CN213011623U - Grab crane with accurate weighing device - Google Patents
Grab crane with accurate weighing device Download PDFInfo
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- CN213011623U CN213011623U CN202021100089.6U CN202021100089U CN213011623U CN 213011623 U CN213011623 U CN 213011623U CN 202021100089 U CN202021100089 U CN 202021100089U CN 213011623 U CN213011623 U CN 213011623U
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- weighing device
- wire rope
- speed reducer
- sensor
- accurate weighing
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Abstract
The invention discloses a grab crane with an accurate weighing device. The grab bucket crane with the accurate weighing device comprises a frame, a bearing seat, a motor, a steel wire rope reel and the accurate weighing device, wherein the accurate weighing device comprises a speed reducer, a sensor and a torque support seat, when the steel wire rope 41 is subjected to certain tension in work, the hinged part of the speed reducer 11 and the torque support seat 13 generates corresponding resistance according to the torque balance principle, the torque generated by the resistance is equal to the torque generated by the steel wire rope 41, and the force received by the shaft type pin sensor 12 and the tension of the steel wire rope 41 form a linear corresponding relation. The utility model discloses a grab bucket crane with accurate weighing device can be under the support of software, will weigh the weight and show in real time to can gather every fill of fixed point throw material rubbish weight and carry out the cumulative sum of shift and the cumulative sum of month, record, statistics, storage and printing realize real-time and historical data inquiry, have simple structure, advantage that the accuracy is high.
Description
Technical Field
The utility model relates to a hoist accurate measurement technical field especially relates to a grab bucket crane with accurate 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, some enterprises adopt a multipoint arrangement sensor to solve the problem of accurate weighing and metering, weighing is carried out by a multipoint power taking mode and an accumulative calculation method, the actual metering precision is poor, and frequent correction is needed.
The utility model provides a grab bucket crane CN 201605105U that high accuracy was weighed, this technique adopts the sensor to be cantilever sensor, and the sensor is installed between dolly end beam and wheel case, and the wheel case is around the articulated shaft free rotation. Because the installation position of the sensor is far away from the steel wire rope drum, four-point force taking is adopted, dynamic vibration factors caused by additional moment and unpredictable vibration are more, the weighing precision is seriously influenced, and the device has no practical application and popularization value.
The utility model provides a rubbish grab bucket bridge crane weighing device CN103910287A, this technique adopts the sensor to be the column type sensor, because do not effectively solve the problem of transmission shaft additional moment, the precision of weighing receives great interference. In practical application, the weighing precision is not high. And the weighing precision is greatly floated.
The weighing device CN203112357U of two roof beam bridge type grab bucket crane, this patent have announced the principle of weighing, and weighing device's theory of operation is: when the grab crane picks the heavy object and lifts the heavy object and transfers to the transportation process, the band-type brake belongs to the tightly-holding state, 1/2 of the weight of the lifted heavy object is borne by both ends of the lifting steel wire rope reel, the lifted load is detected by the 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 the signal amplifier and then is transmitted to the weighing display to be converted into a number to display the lifted weight, and therefore the error of the lifted weight of the grab bucket is controlled within the range of 5% in the loading and transporting process. The weighing structure is not discussed and referred to, namely, a principle patent. And the weighing precision can not reach the precision value required in the current field, so the method has no practical application significance.
Disclosure of Invention
The present invention is directed to a grab crane with an accurate weighing device, which overcomes the above-mentioned shortcomings of the prior art.
The invention realizes the purpose through the following technical scheme: the utility model provides a grab bucket crane with accurate weighing device, frame, bearing frame motor, wire rope reel, accurate weighing device, wherein: the accurate weighing device is connected with the motor and the steel wire rope reel;
the accurate weighing device comprises a speed reducer and a sensor, wherein the high-speed end of the speed reducer is connected with a motor, the low-speed end of the speed reducer is connected with a steel wire rope reel, and the sensor is connected with the high-speed end of the speed reducer.
As a further optimization scheme of the invention, the sensor is a pin-type sensor, and the pin-type sensor is connected with an external transmitter through a double-shielded wire.
As a further optimization scheme of the invention, the accurate weighing device also comprises a moment support seat, and the sensor is arranged on the moment support seat.
As a further optimization scheme of the invention, the motor is connected with the speed reducer through a universal transmission shaft.
As a further optimization scheme of the invention, the speed reducer is directly connected with the wire rope reel through splines.
As a further optimization scheme of the invention, the low-speed end of the speed reducer is fixed on the wire rope reel in a sleeving manner.
As a further optimization scheme of the invention, the pin shaft type sensor, the torque support seat and the speed reducer are in clearance fit.
The utility model has the advantages that: the force is taken through the moment, the structure is simple, and the weighing precision is high; the measurement precision error is less than or equal to 1 percent and the stable value is less than or equal to 1.5 percent through verification; the weighing weight can be displayed in real time under the support of software, and the weight of the fed garbage of each hopper can be collected, and the garbage is accumulated in shift and month, recorded, counted, stored and printed; the weight data can be remotely transmitted under the support of industrial automation and network, and remote real-time and historical data query is realized.
Drawings
FIG. 1 is a schematic view of a grab crane of the present invention having a precision weighing device;
FIG. 2 is a top view of the grab crane of the present invention with a precision weighing device;
the device comprises a frame 1, a bearing seat 2, a motor 3, a wire rope reel 4, a grab bucket 5, a speed reducer 11, a sensor 12, a torque support seat 13, a universal transmission shaft 31 and a wire rope 41.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
In the grab bucket crane with the accurate weighing device, when the steel wire rope 41 is subjected to certain tension, according to the moment balance principle, the hinged part of the speed reducer 11 and the moment support seat 13 generates corresponding resistance, the moment generated by the resistance is equal to the moment generated by the steel wire rope 41, and the force applied to the pin shaft type sensor 12 and the tension of the steel wire rope 41 are in linear correspondence.
The grab crane with the accurate weighing device shown in fig. 1 and 2 comprises a frame 1, a bearing seat 2, a motor 3, a steel wire rope reel 4 and the accurate weighing device, wherein the bearing seat 2 and the motor 3 are installed on the frame 1, the steel wire rope reel 4 is rotatably installed on the bearing seat 2, and the accurate weighing device is connected with the motor 4 and the steel wire rope reel 4.
The accurate weighing device comprises a speed reducer 11 and a sensor 12, wherein the high-speed end of the speed reducer 11 is connected with a motor 3, the low-speed end of the speed reducer is connected with a steel wire rope reel 4, and the sensor 12 is connected with the high-speed end of the speed reducer 11.
Wherein, the both ends of wire rope reel 4 are erect on trolley frame 1 through bearing frame 2, and trolley frame 1 is used for supporting wire rope reel 4. The wire rope 41 is wound on the wire rope reel 4, the tail end of the wire rope 41 is connected with the grab bucket 5 through a shackle or a hanging ring, and due to gravity, the wound wire rope 41 is continuously lowered, so that the wire rope reel 4 is driven to rotate. The speed reducer 11 is hung at one end of the steel wire rope reel 4, the output end of the speed reducer 11 is fixed on a steel wire rope reel shaft of the steel wire rope reel 4, the speed reducer 11 is connected with the motor 3 in the later period, and the rotating speed of the speed reducer 11 is controlled through the motor 3, so that the steel wire rope reel 4 is driven to rotate, and the steel wire rope 41 is transferred or recovered. The speed reducer 11 is arranged in a suspended manner, and fixing devices such as foundation bolts are not arranged between the speed reducer 11 and the trolley frame 1, so that the speed reducer 11 can transmit torque to the pin shaft type sensor 12.
As shown in fig. 2, when the grab bucket 5 after grabbing the garbage is lifted, a rightward moment is generated on the center of the wire rope reel 4 due to the gravity F0 of the grab bucket 5, the garbage and the wire rope 41, and a corresponding resistance force is generated at the pin shaft type sensor 12 on the speed reducer 11 according to the moment balance principle through the pin shaft type sensor 12, and the moment generated by the resistance force is equal to the moment generated by F0. That is, F1-M/L1-F0 xr/L1. Wherein, F1 is the upward force generated at the pin sensor 12, R is the radius of the wire rope reel, M is the moment generated by F0 to the center of the wire rope reel 4, and L1 is the distance from the pin sensor 12 to the center of the wire rope reel 4.
Specifically, the speed reducer 11, the wire rope reel 4, and the pin shaft sensor 12 form a pair of equal and opposite moments, and at this time, the acting force F1 applied to the pin shaft sensor 12 and the acting force F0 applied to the wire rope reel 4 are in linear correspondence, so that F0 can be calculated by using data detected by the pin shaft sensor 12. Because the influence of the additional moment is avoided, and the additional force caused by the vibration of other parts of the crane is small, the measurement accuracy of the pin shaft type sensor 12 is ensured.
And the pin shaft type sensor 12 is connected with a sensor signal wire, the sensor signal wire is used for transmitting the analog signal quantity corresponding to the acting force applied on the pin shaft type sensor 12 to a weight transmitter, the analog signal quantity is converted into a digital signal through a PLC (programmable logic controller) and the digital signal is displayed on a PC (personal computer) display or a touch screen to show accurate actual weight, and the acquired signal is uploaded to a control room through a bus, so that the data transmission is reliable and stable, and the accuracy is high.
In the embodiment, in specific implementation: when the moment balance is calculated, the steel wire rope reel 4 is in a static state, and is realized by an internal contracting brake on the speed reducer 11.
When the pin shaft type sensor 12 is selected for cranes with different lifting loads, parameters of the set sensor can be preselected through simple calculation, and the maximum pressure value of the pin shaft type sensor 12 is calculated by combining the force arm values according to the self weight of the grab bucket 5, the weight of garbage, the diameter of the steel wire rope drum 4 and the like.
Along with the sustainable and stable development of national economy, the logistics transportation volume is rapidly increased, the requirements on the application and automation/semi-automation of a grab bucket crane as a core device for logistics transportation are higher and higher, therefore, in order to realize the automation/semi-automation of weighing, the accurate weighing device in the embodiment can be used in combination with software, the weighing weight is displayed in real time through the support of the software, the weight of materials in each bucket can be collected, the number of shifts and the number of months can be accumulated, corresponding recording, counting, storing and printing functions are provided, and the use and the management are convenient. Meanwhile, under the support of the Internet of things, the weight data can be remotely transmitted to the fixed terminal equipment and the intelligent mobile terminal equipment, so that remote real-time and historical data query is realized.
Example 2
As shown in example 1, the only difference is that sensor 12 is a pin-type sensor that is connected to the external transmitter by a double shielded wire.
Example 3
As shown in embodiment 1, the difference is only that the precision weighing apparatus further includes a moment support base 13, and the sensor 12 is mounted on the moment support base 13.
Example 4
As shown in embodiment 1, the difference is only that the motor 3 and the speed reducer 11 are connected by a universal drive shaft 31.
Example 5
As shown in embodiment 1, the difference is that the speed reducer 11 and the wire rope reel 4 are directly connected by splines.
Example 6
As shown in example 1, the only difference is that the low-speed end of the speed reducer 11 is fixed to the wire reel 4 in a fitted manner.
Example 7
As shown in embodiment 1, the difference is only that the pin sensor 12, the torque support base 13 and the reducer 11 are in clearance fit.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (7)
1. The utility model provides a grab bucket crane with accurate weighing device, includes frame (1), bearing frame (2), motor (3), wire rope reel (4), accurate weighing device, its characterized in that: the bearing seat (2) and the motor (3) are arranged on the frame (1), the steel wire rope reel (4) is rotatably arranged on the bearing seat (2), and the accurate weighing device is connected with the motor (3) and the steel wire rope reel (4);
the accurate weighing device comprises a speed reducer (11) and a sensor (12), wherein the high-speed end of the speed reducer (11) is connected with a motor (3), the low-speed end of the speed reducer is connected with a steel wire rope reel (4), and the sensor (12) is connected with the high-speed end of the speed reducer (11).
2. The grapple crane with precision weighing device of claim 1, wherein: the sensor (12) is a pin-type sensor, and the pin-type sensor is connected with an external transmitter through a double-shielded wire.
3. The grapple crane with precision weighing device of claim 1, wherein: the accurate weighing device also comprises a moment support seat (13), and the sensor (12) is installed on the moment support seat (13).
4. A grapple crane with precision weighing device according to claim 2, wherein: the motor (3) is connected with the speed reducer (11) through a universal transmission shaft (31).
5. The grapple crane with precision weighing device of claim 1, wherein: the speed reducer (11) is directly connected with the wire rope reel (4) through a spline.
6. The grapple crane with precision weighing device of claim 1, wherein: the low-speed end of the speed reducer (11) is fixed on the wire rope reel (4) in a sleeving manner.
7. The grapple crane with precision weighing device of claim 1, wherein: the pin shaft type sensor (12) and the torque support seat (13) are in clearance fit with the speed reducer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021100089.6U CN213011623U (en) | 2020-06-15 | 2020-06-15 | Grab crane with accurate weighing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021100089.6U CN213011623U (en) | 2020-06-15 | 2020-06-15 | Grab crane with accurate weighing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213011623U true CN213011623U (en) | 2021-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021100089.6U Active CN213011623U (en) | 2020-06-15 | 2020-06-15 | Grab crane with accurate weighing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213011623U (en) |
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2020
- 2020-06-15 CN CN202021100089.6U patent/CN213011623U/en active Active
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