CN117163836B - Monitoring method for keeping safety distance between hoisting machinery and electrified line - Google Patents
Monitoring method for keeping safety distance between hoisting machinery and electrified line Download PDFInfo
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- CN117163836B CN117163836B CN202311127008.XA CN202311127008A CN117163836B CN 117163836 B CN117163836 B CN 117163836B CN 202311127008 A CN202311127008 A CN 202311127008A CN 117163836 B CN117163836 B CN 117163836B
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Abstract
The invention relates to a monitoring method for keeping the safety distance between a hoisting machine and an electrified line, which is realized by a ranging host and a ranging slave which are respectively arranged at the lower part and the highest point of a suspension arm of the hoisting machine, wherein the ranging host and the ranging slave are used for measuring the vector distance between the hoisting machine and the electrified line, and the ranging host is in communication connection with a control mechanism which is electrically connected with a hydraulic control system of the hoisting machine and used for judging and calculating the distance between the electrified line and the suspension arm and setting an early warning threshold; the monitoring method comprises the following steps: low-level sensing ranging and low-level alarming; ranging by a high-order algorithm and alarming by high-order; early warning judgment; and (5) alarming. According to the monitoring method for keeping the safe distance between the hoisting machinery and the electrified line, disclosed by the invention, the safe distance between the hoisting machinery and the electrified line is accurately kept; and the functions of early warning, alarming and forced stopping are carried out.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a monitoring method for keeping a safe distance between a hoisting machine and an electrified line.
Background
The hoisting machinery is a mechanical equipment for lifting and carrying heavy objects, and is widely applied to hoisting work in sites such as construction sites, ports and dock sites. The crane is usually composed of a frame, a boom, a hoisting mechanism, a control system.
Flexible hoisting cranes are generally adopted in electric power construction, but in the actual construction process, due to parallax existing below an observer and an operator, the distance between a hoisting object and a live wire is wrongly judged.
At present, the conventional mode is to set up electroscope on the davit top of hoisting machinery to according to the phoenix ware of electroscope, alarm light carry out the judgement of distance, however conventional electroscope judgement mode still exists following not enough:
1. when the upper top end of the suspension arm is higher than the electrified circuit or the suspension arm rotates, the electroscope cannot judge correctly;
2. the conventional electroscope has only the function of sound and light alarm, and cannot be completely heard and seen in a noisy and high-brightness outdoor construction site; and has no control function.
Disclosure of Invention
In order to solve the technical problems in the background technology, the invention provides a monitoring method for keeping the safety distance between a hoisting machine and a live line, and the safety distance between a boom and the live line is accurate; and the functions of early warning, alarming and forced stopping are carried out.
The invention adopts the technical scheme that:
the utility model provides a keep lifting machinery and live line safe distance's monitoring method, is realized by setting up range finding host computer, the range finding slave machine on lifting machinery's the davit, range finding host computer, range finding slave machine set up respectively in the lower part of davit, the highest point for measure the vector distance between the two, and the live line respectively with the vector distance between the two, range finding host computer communication connection is provided with control mechanism, control mechanism is connected with lifting machinery's hydraulic control system electricity, is used for judging, calculates live line and davit's distance, and sets for the early warning threshold value.
The monitoring method comprises the following steps:
A. starting:
before the boom of the hoisting machinery extends, starting a ranging host machine and a ranging slave machine for initialization;
b1, low-order induction ranging:
according to the vector distance from the electrified line to the ranging slave machineIt can be seen that:
distance between boom and live line
C1, low-order alarm:
when the distance between the suspension arm and the electrified circuit is smaller than the standard safety distance, the method comprises the following steps:
H＜H Secure when the alarm signal is sent out;
b2, ranging by a high-order algorithm:
according to the vector distance from the electrified line to the ranging slave machineVector distance from live line to ranging host>According to the vector distance from the ranging slave to the ranging master +.>The distance H between the suspension arm and the electrified circuit can be calculated;
c2, high-order warning:
when the distance between the suspension arm and the electrified circuit is smaller than the standard safety distance, the method comprises the following steps:
H＜H Secure when the alarm signal is sent out;
D. early warning judgment:
according to the voltage level of the electrified line, the early warning threshold H is set by the control mechanism Threshold value ；
When H is less than or equal to H Threshold value When the crane is in a lifting state, the control mechanism sends a control signal to a hydraulic control system of the crane, and adjusts the rotating speed of an oil pump of the hydraulic control system, so that the moving speed of the lifting arm is reduced;
E. and (3) alarming:
when a low-order alarm and a high-order alarm occur, the method comprises the following steps:
H＜H Secure when the hydraulic control system is used, the control mechanism sends a control signal to the hydraulic control system of the hoisting machinery to control the distribution valve of the hydraulic control system to be closedClosing, thereby stopping the boom from moving.
Further, the ranging host includes:
the main machine box is arranged at the lower part of the hanging arm, a first inductance ranging module is arranged in the main machine box, and a transmitting end group is arranged at the front end of the main machine box.
Further, the ranging slave comprises:
the secondary box is arranged at the highest point of the suspension arm, a second inductance ranging module is arranged in the secondary box, a receiving end is arranged at the rear end of the secondary box, and the receiving end and the sending end group are oppositely arranged.
Further, in the step B2, in the ranging of the high-order algorithm:
the vector distance from the live line to the ranging slave is:the vector distance from the live line to the ranging host is:the vector distance from the ranging slave to the ranging host is: />Further, in the step B2, in the ranging of the high-order algorithm:
will beThe spatial rectangular coordinate system is arranged into horizontal rectangular coordinates, namely: />
Wherein: p point atUpper and coplanar with the live line, ">Further, in the step B2, in the ranging of the high-order algorithm, the distance between the boom and the live line is as follows:
wherein:
is +.>Area of triangle MNPFurther, in the area formula of the triangle MNP:
further, in a space rectangular coordinate system:
the vector distance from the live line to the ranging slave is:
the vector distance from the live line to the ranging host is:
the vector distance from the ranging slave to the ranging host is:
further, in horizontal rectangular coordinates:
wherein:
is->The projection on the horizontal rectangular coordinates is as follows:
further, the range finding slave is provided with two sets, including:
the first distance measuring slave machine is arranged at the highest point of the suspension arm, and the second distance measuring slave machine is arranged in the middle of the suspension arm;
the first distance measuring slave machine and the second distance measuring slave machine are used for measuring two sets of distance measuring data, so that the distance between the two sets of suspension arms and the electrified line is calculated, and data comparison is conducted.
The monitoring method for keeping the safety distance between the hoisting machinery and the electrified line has the advantages that:
1. the vector distance between the two is measured through the distance measuring host and the distance measuring slave, and the vector distance between the live line and the two is measured through the live line;
2. judging the safety distance between the suspension arm and the electrified line through an algorithm;
3. the safety is improved by means of alarming, early warning and forced stopping.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, and the drawings in the following description are embodiments of the present invention.
FIG. 1 is a general perspective view of an example of the invention;
FIG. 2 is a schematic perspective view of a ranging host according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a ranging slave according to an example of the present invention;
FIG. 4 is a schematic diagram of boom-to-live line distance for an example of the present invention;
FIG. 5 is a schematic flow chart of an example of the invention;
fig. 6 is a vector distance schematic of an example of the invention.
In the figure:
100. the suspension arm is provided with a suspension arm,
1. the distance measuring host machine is used for measuring the distance of the object,
10. a host box 11, a first inductance ranging module 12 and a transmitting end group,
2. the distance-measuring slave machine is provided with a distance measuring device,
2-A, a first ranging slave, 2-B, a second ranging slave,
20. the secondary machine box, 21, the second inductance ranging module, 22 and the receiving end.
Detailed Description
In order to more clearly and clearly describe the specific implementation objects and embodiments of the present invention, the following description will fully describe the technical solutions of the present invention, and the described embodiments are some, but not all, embodiments of the present invention. All other embodiments based on the described embodiments of the invention fall within the scope of the invention without making inventive efforts.
The invention discloses a monitoring method for keeping a safe distance between a hoisting machine and an electrified line, which is realized by a ranging host machine 1 and a ranging slave machine 2 which are arranged on a boom 100 of the hoisting machine as shown in fig. 1.
The distance measuring host 1 is disposed at a lower portion of the boom 100, as shown in fig. 2, and includes:
the main box 10 is arranged at the lower part of the suspension arm 100, a first inductance ranging module 11 is arranged in the main box 10, and a transmitting end group 12 is arranged at the front end of the main box 10.
The ranging slave 2 is disposed at the highest point of the boom 100, as shown in fig. 3, and includes:
the secondary box 20 is arranged at the highest point of the suspension arm 100, the secondary box 20 is internally provided with a second inductance ranging module 21, the rear end of the secondary box 20 is provided with a receiving end 22, the receiving end 22 is arranged opposite to the transmitting end group 12 and is used for measuring vector distances between the ranging host 1 and the ranging slave 2, an electrified line is respectively connected with the ranging host 1 and the ranging slave 2 in a communication manner, the ranging host 1 is provided with a control mechanism, and the control mechanism is electrically connected with a hydraulic control system of the lifting machine and is used for judging and calculating the distance between the electrified line and the suspension arm 100 and setting an early warning threshold value.
According to the specific structures of the ranging master 1 and the ranging slave 2 in the above embodiments, the following describes the monitoring method, as shown in fig. 4 and 5:
A. starting:
before the boom 100 of the hoisting machinery extends, starting a ranging host machine 1 and a ranging slave machine 2 for initialization;
b1, low-order induction ranging:
according to the vector distance from the live line to the ranging slave 2It can be seen that:
distance between boom 100 and live line
C1, low-order alarm:
when the distance between the boom 100 and the live line is less than the standard safety distance, it is: h < H Secure When the alarm signal is sent out;
b2, ranging by a high-order algorithm:
the vector distance from the live line to the ranging slave 2 is:the vector distance from the live line to the ranging host 1 is: />The vector distance from the ranging slave 2 to the ranging master 1 is: />In a space rectangular coordinate system:
the vector distance from the live line to the ranging slave 2 is:
the vector distance from the live line to the ranging host 1 is:
the vector distance from the ranging slave 2 to the ranging master 1 is:
will beThe spatial rectangular coordinate system is arranged into horizontal rectangular coordinates, as shown in fig. 6, namely:
wherein: p point atUpper and coplanar with the live line, ">In horizontal rectangular coordinates:
wherein:is->The projection on the horizontal rectangular coordinates is as follows:
the distance between boom 100 and the live line is calculated as:
wherein:
is +.>Area of triangle MNP
In the area formula of the triangle MNP:
c2, high-order warning:
when the distance between the boom 100 and the live line is less than the standard safety distance, it is:
H＜H Secure when the alarm signal is sent out;
D. early warning judgment:
according to the voltage level of the electrified line, the early warning threshold H is set by the control mechanism Threshold value ；
When H is less than or equal to H Threshold value When the crane is in a lifting state, the control mechanism sends a control signal to a hydraulic control system of the crane, and adjusts the rotating speed of an oil pump of the hydraulic control system, so that the moving speed of the boom 100 is reduced;
E. and (3) alarming:
when a low-order alarm and a high-order alarm occur, the method comprises the following steps:
H＜H Secure when the boom 100 is moved, the control mechanism sends a control signal to the hydraulic control system of the hoisting machine, and controls the hydraulic control system distribution valve to be closed, thereby stopping the movement of the boom.
In order to improve the accuracy of the distance between the boom 100 and the live line, the ranging slave 2 is provided with two groups comprising:
the first ranging slave machine 2-A is arranged at the highest point of the suspension arm 100, and the second ranging slave machine 2-B is arranged in the middle of the suspension arm 100; the first ranging slave machine 2-a and the second ranging slave machine 2-B are used for measuring two sets of ranging data, so as to calculate the distances between the two sets of suspension arms 100 and the electrified line.
The boom 100 has a uniform travel, data distribution is in a normal distribution mode, and data comparison is performed by an arithmetic mean method.
Based on the above, the embodiment of the monitoring alarm device for keeping the safety distance between the hoisting machinery and the live line of the invention is taught, and by the above description, related workers can completely make various changes and modifications within the scope of not deviating from the technical idea of the invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (8)
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| CN118637496B (en) * | 2024-08-16 | 2024-10-18 | 国网山东省电力公司聊城市茌平区供电公司 | Safety monitoring alarm method and system for site construction |
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