A crane hoisting telescopic arm

Abstract

The present invention provides a crane hoisting telescopic arm, which is arranged between the crane base and the crane head, including a main arm and a plurality of jibs that are sequentially telescopic in the main arm; wherein, at least one safety distance measurement warning device for detecting surrounding obstacles is installed on the outer wall of the innermost jib, and each safety distance measurement warning device can be accommodated in a corresponding chute provided by the innermost jib and its adjacent jib; each chute is a notched groove located on the inner wall of the innermost jib and its adjacent jib, and each notched groove is a long groove with a notch; each safety distance measurement warning device can move back and forth in the corresponding chute, and the alarm upper limit value set is less than or equal to the predetermined detection range, and the alarm lower limit value set is greater than the radial value of the corresponding chute. The implementation of the present invention can not only detect and warn obstacles in the safety zone during the crane hoisting operation, reduce the risk of accidental electric shock, but also save time and effort.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, and in particular to a crane hoisting telescopic arm. Background Art

[0002] With the development of society, the probability of crane lifting operations has also increased, especially in power grid plants (stations).

[0003] However, the crane hoisting operation space in power grid plants (stations) is small, and there is a risk of accidental electric shock from high-voltage live equipment. In addition, the structural design of existing crane hoisting telescopic arms does not take into account the safety distance detection function for high-voltage power grid on-site operations. If the safety distance detection equipment is temporarily installed, it will be time-consuming and labor-intensive.

[0004] Therefore, it is necessary to improve the existing crane lifting telescopic arm, which can not only detect and warn of obstacles in the safety zone during crane lifting operations, reduce the risk of accidental electric shock, but also save time and effort. Summary of the invention

[0005] The technical problem to be solved by the embodiments of the present invention is to provide a crane hoisting telescopic arm, which can not only detect and warn obstacles in the safety zone during crane hoisting operations, reduce the risk of accidental electric shock, but also save time and effort.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a crane hoisting telescopic arm, which is arranged between the crane base and the crane head, and includes a main arm and a plurality of auxiliary arms that are sequentially extended and retracted in sequence; wherein at least one safety distance measurement and warning device for detecting surrounding obstacles is installed on the outer wall of the innermost auxiliary arm, and each safety distance measurement and warning device can be accommodated in a corresponding slide groove of the adjacent auxiliary arm of the innermost auxiliary arm;

[0007] Each of the slide grooves is a notch groove located on the inner wall of the innermost section of the auxiliary arm and the adjacent section of the auxiliary arm; each notch groove is a long groove formed by being recessed axially toward the direction of the crane base starting from the notch formed on the end surface of one end facing the crane head;

[0008] Each safety distance measurement and warning device can move back and forth in the corresponding slide groove as the innermost section of the auxiliary arm moves in an extension and retraction manner; each safety distance measurement and warning device is preset with an upper alarm limit value and a lower alarm limit value, and the set upper alarm limit value is less than or equal to its own predetermined detection range, and the set lower alarm limit value is greater than the radial value of the corresponding slide groove.

[0009] There are four safety distance measurement warning devices, and the four safety distance measurement warning devices are respectively accommodated in four slide grooves with different directions reserved between the innermost auxiliary arm and the corresponding adjacent auxiliary arms.

[0010] The four slide grooves with different directions are connected to each other to form a cavity.

[0011] Wherein, the multi-section auxiliary arm is composed of three-section auxiliary arms which can be telescoped in sequence section by section.

[0012] Each safety distance measurement warning device includes a plurality of distance measurement radars with the predetermined detection range and an alarm mechanism;

[0013] Each ranging radar is connected to the alarm mechanism via a flexible busbar;

[0014] The alarm mechanism is used to alarm or not alarm according to the preset alarm lower limit value and upper limit value; wherein, after the innermost section of the auxiliary arm extends out to its adjacent section of the auxiliary arm, if the obstacle enters the predetermined detection range corresponding to any ranging radar, an alarm is given; after the innermost section of the auxiliary arm retracts to its adjacent section of the auxiliary arm, no alarm is given.

[0015] The alarm mechanism includes a signal acquisition and judgment circuit, a transistor, a relay, an indicator light and a battery;

[0016] The battery, the indicator light and the normally open contact of the relay are connected in series to form a loop;

[0017] The base of the transistor is connected to each ranging radar through the signal acquisition and judgment circuit, the collector is connected to the positive electrode of the battery, and the emitter is grounded through the voltage end of the relay and connected to the negative electrode of the battery;

[0018] Wherein, the signal acquisition and judgment circuit is used to make a judgment based on the obstacle distance detected by each ranging radar, and generate a high-level signal or a low-level signal according to the judgment result; wherein, if it is judged that the obstacle distance detected by a certain ranging radar is less than or equal to the radial value of the slideway where the ranging radar is located, a low-level signal is generated to cut off the transistor so that the normally open contact of the relay remains disconnected, so that the indicator light is not powered on and no alarm is issued; if it is judged that the obstacle distance detected by a certain ranging radar is greater than the radial value of the slideway where the ranging radar is located and is less than or equal to the predetermined detection range of the ranging radar, a high-level signal is generated to turn on the transistor so that the relay is powered on to close its normally open contact, so that the indicator light is powered on and an alarm is issued.

[0019] Wherein, each of the safety distance measurement warning devices has two distance measurement radars, and the two have the same structure and the same predetermined detection range.

[0020] Wherein, the ranging radar is a millimeter wave ranging radar or a micrometer wave ranging radar.

[0021] The implementation of the embodiments of the present invention has the following beneficial effects:

[0022] The present invention installs at least one safety distance measurement and warning device for detecting surrounding obstacles on the outer wall of the innermost section of the auxiliary arm, and is accommodated in a corresponding slide groove reserved between the corresponding adjacent sections of the auxiliary arm, so as to alarm for obstacles whose distance is between the radial value of the slide groove and the predetermined detection range, thereby achieving the purpose of not only detecting and warning obstacles in the safety zone during crane lifting operations, reducing the risk of accidental electric shock, but also saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0024] Figure 1 An overall structural plan view of a crane hoisting telescopic arm provided by an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A front view of the innermost section of a multi-section jib retracted to the corresponding adjacent section;

[0026] Figure 3 for Figure 2 Left side plan view;

[0027] Figure 4 for Figure 1 A front plan view of the innermost section of a multi-section jib extending to the corresponding adjacent section of the jib;

[0028] Figure 5 for Figure 1 A schematic diagram of the structure of the alarm area of ​​the safety distance measurement warning device on the innermost section of the multi-section jib;

[0029] Figure 6 for Figure 1 A schematic diagram of the circuit connection of the alarm mechanism of the safety distance measurement and early warning device on the innermost section of a multi-section jib. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] like Figures 1 to 5As shown, a crane hoisting telescopic arm is proposed in an embodiment of the present invention, which is arranged between a crane base (not shown) and a crane head (not shown), including a main arm L1 and a multi-section auxiliary arm L2 therein which are sequentially extended and retracted section by section, and also includes a retractable hydraulic strut and a retractable mechanism; wherein, the main arm L1 is fixed on the crane base, and the multi-section auxiliary arm L2 is embedded therein; the outermost section of the multi-section auxiliary arm L2 is embedded in the cavity of the main arm L1 and can realize retractable movement in the cavity of the main arm L1, and the innermost section of the multi-section auxiliary arm L2 is installed with a crane head at the end away from the crane base; the two ends of the hydraulic strut are respectively connected to the crane base and the middle part of the main arm L1, and can lift or pull down the main arm L1 within a certain height range; the retractable mechanism penetrates into the main arm L1 and is connected to the multi-section auxiliary arm L2, so as to drive each section of the auxiliary arm L2 to retract and retract section by section in a certain sequence;

[0032] Among them, at least one safety distance measurement warning device 1 for detecting surrounding obstacles is installed on the outer wall of the innermost section of the auxiliary arm, and each safety distance measurement warning device 1 can be accommodated in a corresponding slide groove X provided in the adjacent section of the auxiliary arm of the innermost section of the auxiliary arm;

[0033] Each of the slide grooves X is a notch groove located on the inner wall of the adjacent section of the innermost section of the auxiliary arm; each notch groove is a long groove formed by being recessed axially toward the crane base starting from the notch formed on the end surface of one end facing the crane head;

[0034] Each safety distance measurement warning device 1 can move back and forth in the corresponding slide slot as the innermost section of the auxiliary arm moves in extension and contraction; each safety distance measurement warning device 1 is preset with an alarm upper limit value and a lower limit value, and the alarm upper limit value is less than or equal to its own predetermined detection range (such as Figure 5 R), the set alarm lower limit value is greater than the radial value of the corresponding chute (such as Figure 5 r) shown.

[0035] It is understandable that, depending on the actual crane model, the multi-section jib L2 can be composed of three-section jibs that are telescopically extended section by section, or five-section jibs that are telescopically extended section by section, or jibs with other numbers of sections. Please refer to actual applications for details.

[0036] In the embodiment of the present invention, considering that the radial profile structure of the innermost section of the auxiliary arm is a square, four safety distance measurement warning devices 1 can be provided, and the four safety distance measurement warning devices 1 are respectively accommodated in four different direction slide grooves reserved between the innermost section of the auxiliary arm and the corresponding adjacent section of the auxiliary arm. At this time, if the four different direction slide grooves X are connected, a cavity body (such as Figure 3 The hollow cavity may be a hollow cavity of a circular shape, a square shape, or the like.

[0037] In an embodiment of the present invention, each safety ranging and warning device 1 includes a plurality of ranging radars 2 with a predetermined detection range and an alarm mechanism 3; wherein,

[0038] Each ranging radar 2 is connected to the alarm mechanism 3 through a flexible busbar;

[0039] The alarm mechanism 3 is used to alarm or not alarm according to a preset alarm lower limit value and upper limit value; wherein, after the innermost secondary boom extends out of its adjacent secondary boom, if an obstacle enters the predetermined detection range corresponding to any ranging radar 2, an alarm is given; after the innermost secondary boom retracts to its adjacent secondary boom, no alarm is given. Among them, the alarm mechanism 3 can give an alarm through an indicator light or / and a buzzer.

[0040] In one example, each safety ranging and warning device 1 has two ranging radars 2, and the two have the same structure and the same predetermined detection range. The ranging radar 2 is a millimeter-wave ranging radar (the corresponding detection range is between (0, 15 meters], such as R = 10 meters) or a micrometer-wave ranging radar (the corresponding detection range is between (0, 30 meters], such as R = 16 meters).

[0041] In one example, as Figure 6 shown, the alarm mechanism 3 includes a signal acquisition and judgment circuit 31, a triode 32, a relay 33, an indicator light 34 and a battery 35; the battery 35 is connected in series with the indicator light 34 and the normally open contact K of the relay 33 to form a loop; the base B of the triode 32 is connected to each ranging radar 2 through the acquisition and judgment circuit 31, the collector C is connected to the positive electrode + of the battery 35, and the emitter E is grounded through the voltage terminal of the relay 33 and connected to the negative electrode - of the battery 35;

[0042] At this time, the signal acquisition and judgment circuit 31 is used to judge (r~R) based on the distance of the obstacle detected by each ranging radar 21, and generate a high-level signal or a low-level signal according to the judgment result; wherein, if it is judged that the distance of the obstacle detected by a certain ranging radar is less than or equal to the radial value of the chute where the ranging radar is located (for example, <= r), a low-level signal is generated to cut off the triode 32, so that the normally open contact K of the relay 33 remains disconnected, realizing that the indicator light 34 is not powered on and no alarm is given; if it is judged that the distance of the obstacle detected by a certain ranging radar is greater than the radial value of the chute where the ranging radar is located (for example, > r) and less than or equal to the predetermined detection range of the ranging radar (for example, < R), a high-level signal is generated to turn on the triode 32, so that the relay 33 is powered on to close its normally open contact K, realizing that the indicator light 34 is powered on and lights up for alarm.

[0043] The working principle of the crane hoisting telescopic arm alarming or not alarming proposed in the embodiment of the present invention is that when the crane hoisting is not in operation, because the multi-section jib L2 does not extend the innermost section of the jib, the safety distance measurement and warning device 1 on the innermost section of the jib determines that the obstacle distance is less than the radial value of the chute in which it is located, so that the alarm mechanism 3 determines that the alarm lower limit r has not been reached and the alarm is not triggered; when the crane is hoisting, if the multi-section jib L2 does not extend the innermost section of the jib, so that the safety distance measurement and warning device 1 on the innermost section of the jib detects that the obstacle distance is within the predetermined detection range R, the alarm mechanism 3 alarms because the obstacle distance is within the alarm upper and lower limits (i.e., r~R); at the same time, after the crane hoisting operation is completed, the innermost section of the jib retracts to the initial state, and the safety distance measurement and warning device 1 on the innermost section of the jib re-determines that the obstacle distance is less than the radial value of the chute in which it is located, so that the alarm mechanism 3 re-determines that the alarm lower limit r has not been reached and the alarm is not triggered.

[0044] In summary, by analogy, the safety distance measurement warning device 1 can be set on all the auxiliary arms of the multi-section auxiliary arm L2 except the innermost auxiliary arm and the outermost auxiliary arm to detect and warn obstacles in the safety zone, thereby reducing the risk of accidental electric shock and saving time and effort. At this time, the structure and connection relationship of the safety distance measurement warning device 1 on other auxiliary arms can be set with reference to the above content, and the working principle is similar, so it will not be repeated here.

[0045] Implementing the embodiments of the present invention has the following beneficial effects:

[0046] The present invention installs at least one safety distance measurement and warning device for detecting surrounding obstacles on the outer wall of the innermost section of the auxiliary arm, and is accommodated in a corresponding slide groove reserved between the corresponding adjacent sections of the auxiliary arm, so as to alarm for obstacles whose distance is between the radial value of the slide groove and the predetermined detection range, thereby achieving the purpose of not only detecting and warning obstacles in the safety zone during crane lifting operations, reducing the risk of accidental electric shock, but also saving time and effort.

[0047] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A crane hoisting telescopic arm, arranged between the crane base and the crane head, comprising a main arm and a plurality of auxiliary arms which are telescopically arranged in sequence; characterized in that: At least one safety distance measurement warning device for detecting surrounding obstacles is installed on the outer wall of the innermost section of the auxiliary arm, and each safety distance measurement warning device can be accommodated in a corresponding slide groove of the adjacent section of the auxiliary arm of the innermost section of the auxiliary arm; Each of the slide grooves is a notch groove located on the inner wall of the innermost section of the auxiliary arm and the adjacent section of the auxiliary arm; each notch groove is a long groove formed by being recessed axially toward the direction of the crane base starting from the notch formed on the end surface of one end facing the crane head; Each safety distance measurement warning device can move back and forth in the corresponding chute along with the telescopic movement of the innermost section of the auxiliary arm; each safety distance measurement warning device is preset with an upper and lower alarm limit, and the upper alarm limit is less than or equal to its own predetermined detection range, and the lower alarm limit is greater than the radial value of the corresponding chute; There are four safety distance measurement warning devices, and the four safety distance measurement warning devices are respectively accommodated in four chute grooves with different directions reserved between the innermost auxiliary arm and the corresponding adjacent auxiliary arm; The four slide grooves with different directions are connected to each other to form a hollow cavity; Each safety distance measurement warning device includes a plurality of distance measurement radars with the predetermined detection range and an alarm mechanism; Each ranging radar is connected to the alarm mechanism via a flexible busbar; The alarm mechanism is used to alarm or not alarm according to the preset alarm lower limit value and upper limit value; wherein, after the innermost section of the auxiliary arm extends out to its adjacent section of the auxiliary arm, if the obstacle enters the predetermined detection range corresponding to any ranging radar, an alarm is given; after the innermost section of the auxiliary arm retracts to its adjacent section of the auxiliary arm, no alarm is given.

2. The crane hoisting telescopic arm according to claim 1, characterized in that: The multi-section auxiliary arm is composed of three-section auxiliary arms which can be telescoped in sequence section by section.

3. The crane hoisting telescopic arm according to claim 1, characterized in that: The alarm mechanism includes a signal acquisition and judgment circuit, a triode, a relay, an indicator light and a battery; wherein, The battery, the indicator light and the normally open contact of the relay are connected in series to form a loop; The base of the transistor is connected to each ranging radar through the signal acquisition and judgment circuit, the collector is connected to the positive electrode of the battery, and the emitter is grounded through the voltage end of the relay and connected to the negative electrode of the battery; Wherein, the signal acquisition and judgment circuit is used to make a judgment based on the obstacle distance detected by each ranging radar, and generate a high-level signal or a low-level signal according to the judgment result; wherein, if it is judged that the obstacle distance detected by a certain ranging radar is less than or equal to the radial value of the slideway where the ranging radar is located, a low-level signal is generated to cut off the transistor so that the normally open contact of the relay remains disconnected, so that the indicator light is not powered on and no alarm is issued; if it is judged that the obstacle distance detected by a certain ranging radar is greater than the radial value of the slideway where the ranging radar is located and is less than or equal to the predetermined detection range of the ranging radar, a high-level signal is generated to turn on the transistor so that the relay is powered on to close its normally open contact, so that the indicator light is powered on and an alarm is issued.

4. The crane hoisting telescopic arm according to claim 1, characterized in that: Each of the safety distance measurement warning devices has two distance measurement radars, and the two radars have the same structure and the same predetermined detection range.

5. The crane hoisting telescopic arm according to claim 4, characterized in that: The ranging radar is a millimeter wave ranging radar or a micrometer wave ranging radar.

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