Container yard low-frame sliding contact line defect detection device

Abstract

The utility model discloses a container yard low-frame sliding contact line defect detection device, which comprises a fixing mechanism arranged on a yard crane power-taking trolley platform; the detection mechanism is installed on the fixing mechanism and synchronously moves along with the power taking trolley, a guide wheel probe is elastically installed on the detection mechanism and used for stretching into the sliding contact line guide groove, and in the moving process of the power taking trolley, the guide wheel probe can stretch out and draw back up and down along with the defects at the bottom of the sliding contact line guide groove and always keeps rolling to be attached to the bottom of the sliding contact line guide groove; and the alarming and recording system is electrically connected with the detection mechanism, and gives an alarm and records defects in response to the condition that the up-down telescopic displacement of the guide wheel probe exceeds an early warning value. The device synchronously walks along with the electricity taking trolley, real-time detection is achieved, a power supply driving assembly does not need to be additionally arranged, and shutdown detection is not needed; the guide wheel probe is directly contacted with the bottom of the slide wire guide groove to sense defects and trigger an alarm and recording system, so that defect standards can be unified, manual visual inspection is replaced, the detection quality and efficiency are improved, and the labor intensity is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of defect detection of sliding contact lines, in particular to a defect detection device for low-level sliding contact lines in a container yard. Background Art

[0002] A sliding contact line, also known as a sliding conductor, is a set of power transmission devices for supplying power to mobile equipment, mainly composed of the following parts: a conductor and a sheath. As a power supply method for cranes in a container yard, during daily use, the carbon brush pieces of the current collection frame of the power take-off trolley and the guide groove of the sliding contact line gradually wear against each other. In addition, when the crane operates at a certain position in the yard for a long time or under high load, the current is too large, resulting in the heating and slagging of the sliding contact line conductor, the expansion of the sheath, etc. All these situations will cause varying degrees of damage to the sliding contact line, such as the appearance of notches and / or protrusions. In severe cases, it will lead to safety accidents such as the pulling and damage of the current collection frame of the power take-off trolley and the tripping of the high-voltage power station, greatly affecting the safety of power supply from the power station and power reception by the equipment.

[0003] The defects of the sliding contact line mainly occur in the inner groove (guide groove) of its conductor. The installation height of the low-level sliding contact line in the container yard exceeds 2.5 meters, and its guide groove opening is installed downward. At present, the inspection of the internal defects of the low-level sliding contact line in the yard is mainly carried out by manually holding a lighting lamp to irradiate and visually observing the situation inside the guide groove of the sliding contact line. It has the following problems: (1) Due to the high installation position of the sliding contact line and the small gap of the guide groove of the sliding contact line, it is difficult to guarantee the quality of manual visual inspection; (2) The low-level sliding contact lines in the port yard are widely distributed and numerous. Taking our port as an example, there are 106 yards using the sliding contact line power supply method, with 3 sliding contact lines in each yard, a total of 318 sliding contact lines, and the length of each sliding contact line is 220 meters. All inspections require a large amount of manpower and time, and the labor intensity of workers is high; (3) When inspecting the sliding contact line, the equipment (yard crane) needs to stop for cooperation, affecting the on-site production; (4) Managers generally need to regularly inspect the defect situation of the sliding contact line and conduct damage assessment. However, there is currently no unified standard for the defects of the sliding contact line, and the defect location cannot be recorded in time, which is not convenient for management; (5) Considering the production operation of the entire yard, the sliding contact line is not powered off during the inspection process, and there are certain safety hazards in manual visual inspection.

[0004] In order to be able to efficiently detect the defect risks existing in the low-level sliding contact lines in the yard, ensure the power reception safety of the power take-off trolleys of the yard cranes and the operation efficiency of the equipment, it is of great significance to research and develop a detection device that can automatically detect, locate and record the defects of the low-level sliding contact lines in the container yard. Content of the Utility Model

[0005] In view of the defects and deficiencies existing in the prior art, the present utility model proposes a defect detection device for the low-voltage trolley wire in a container yard to solve the problems existing in the current manual visual inspection of the trolley wire defects, including: it is difficult to ensure the inspection quality, the efficiency is low, and the labor intensity is high; it is necessary to stop the equipment for inspection, which affects the on-site production; there is no unified defect standard, which is not convenient for management; and there are safety hazards in live inspection, etc.

[0006] The above object of the present utility model is achieved by the following technical solutions:

[0007] A defect detection device for the low-voltage trolley wire in a container yard, which includes:

[0008] A fixing mechanism, which is detachably installed on the power-taking trolley platform of the yard crane;

[0009] A detection mechanism, which is detachably installed on the fixing mechanism and moves synchronously with the power-taking trolley. The detection mechanism is elastically installed with a guide wheel probe made of insulating material, which is used to extend into the trolley wire guide groove. During the movement of the power-taking trolley, the guide wheel probe can expand and contract up and down with the defects at the bottom of the trolley wire guide groove, and always keep rolling and fitting with the bottom of the trolley wire guide groove;

[0010] An alarm and recording system, which is electrically connected to the detection mechanism, and responds to the displacement amount of the up and down expansion and contraction of the guide wheel probe exceeding the warning value, and issues an alarm and records the defect.

[0011] Preferably, the detection mechanism includes a housing and a telescopic connecting rod. The telescopic connecting rod is connected to the inner wall of the housing through an elastic element, and the upper end of the telescopic connecting rod extends out of the upper surface of the housing movably;

[0012] The guide wheel probe is installed at the upper end of the telescopic connecting rod.

[0013] Preferably, an L-shaped conductive rod is fixed at the lower end of the telescopic connecting rod. The vertical rod of the L-shaped conductive rod is coaxial with the telescopic connecting rod, and the bent part is located at the lower part inside the housing and the end is provided with a contact;

[0014] An upper contact piece and a lower contact piece are oppositely installed inside the housing. The contacts are equidistantly located between the upper contact piece and the lower contact piece. When the displacement amount of the up and down expansion and contraction of the guide wheel probe exceeds the warning value, the contact contacts with the corresponding contact piece.

[0015] Preferably, a horizontal partition plate with a through hole in the center is provided inside the housing below the telescopic connecting rod. The vertical rod of the L-shaped conductive rod movably passes through the central through hole of the horizontal partition plate, and the bent part is located below the horizontal partition plate;

[0016] The elastic element is a spring. One end of the spring is fixed to the lower end of the telescopic connecting rod, and the other end is fixed to the diaphragm. The spring is sleeved on the outer periphery of the vertical rod of the L-shaped conductive rod. The spring provides an upward pre-tightening force to keep the guide wheel probe always in rolling contact with the bottom of the trolley wire groove.

[0017] Preferably, the alarm and recording system includes a crane PLC, a notch alarm buzzer, a protrusion alarm buzzer, and a position encoder. The notch alarm buzzer, the protrusion alarm buzzer, and the position encoder are all electrically connected to the crane PLC.

[0018] The detection mechanism further includes an alarm lamp and an operation switch that are electrically connected. The alarm lamp and the operation switch are arranged on the side wall of the housing. The operation switch is electrically connected to the L-shaped conductive rod. A three-core convenient interface is also provided on the side wall of the housing. The alarm lamp, the upper contact piece, and the lower contact piece are all electrically connected to the three-core convenient interface.

[0019] Electrically connecting the crane PLC to the three-core convenient interface realizes the electrical connection between the alarm and recording system and the detection mechanism.

[0020] Preferably, an external thread is provided on the outer periphery of the upper end of the telescopic connecting rod for threadedly connecting the guide wheel probe and facilitating the adjustment of the position height of the guide wheel probe to adapt to different models of trolley wires.

[0021] Preferably, the lower part of the guide wheel probe is an installation bolt. The nut end of the installation bolt faces downward, and an internal thread hole is opened at the nut end.

[0022] Preferably, a nut is also connected to the external thread of the telescopic connecting rod. After the guide wheel probe is installed and adjusted in place through the installation bolt, the nut is used to screw upward and press against the installation bolt.

[0023] Preferably, two auxiliary guide wheels are installed on the upper surface of the housing. The two auxiliary guide wheels are symmetrically located on both sides of the guide wheel probe to roll in the guide wheel grooves on both sides of the trolley wire sheath.

[0024] Preferably, the fixing mechanism includes a placement frame. The placement frame is a planar four-bar linkage mechanism, which is a closed quadrilateral, and adjacent linkages are connected by hinge point shafts.

[0025] After the placement frame is installed, a set of opposite linkages are erected. One of the vertical linkages has a support seat, and a spring linkage is connected between the lower hinge point shaft of this vertical linkage and a position near the diagonal of the upper side linkage of the placement frame. The placement frame and the spring linkage work together to ensure that the two auxiliary guide wheels always remain in rolling contact with the guide wheel grooves on both sides of the trolley wire sheath.

[0026] The detection mechanism is vertically installed on the upper surface of the support seat by means of bolts penetrating the bottom of the support seat, and the guide wheel probe is perpendicular to the busbar;

[0027] Another vertical connecting rod of the placement frame is fastened to the power-taking trolley platform of the yard crane through connecting bolts.

[0028] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0029] The device is easy to install on the power-taking trolley platform of the yard crane, moves synchronously, and detects in real time. There is no need to install additional power drive components, and there is no need to shut down the equipment for detection. In the process of moving the power-taking trolley, the guide wheel probe elastically installed by the detection mechanism expands and contracts up and down along with the defects in the bottom of the busbar guide groove, and always keeps rolling and fitting the bottom of the busbar guide groove, thereby converting the structural changes of the busbar guide groove caused by defects into position changes of the guide wheel probe. The guide wheel probe directly contacts the bottom of the busbar guide groove to sense defects, and then records the defect location and other information in detail and triggers an alarm through the alarm and recording system electrically connected to the detection mechanism. The operation room can obtain information in time, which is convenient for management personnel to report repairs in time or arrange shutdowns for maintenance in time, avoid equipment damage and power outages, greatly improve the power supply safety of the low-frame busbar in the container yard, and ensure the production operation efficiency of the yard.

[0030] The use of this device facilitates the unification of busbar defect standards. When the notch depth / protrusion height exceeds the warning value, the alarm and recording system will be triggered to issue an alarm and record defect-related information, which is convenient for management and can efficiently replace manual visual inspection, effectively improve the inspection quality and efficiency, and reduce the labor intensity of personnel; no manual participation is required, and the guide wheel probe is made of insulating material, which makes the inspection site safe. In addition, this device can adjust the height position of the guide wheel probe according to the depth of the busbar guide groove, and can be applied to busbars of different models.

[0031] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of a container yard low-rack busbar defect detection device in an exemplary embodiment of the utility model;

[0033] Figure 2 This is a detection circuit diagram of a low-rack busbar defect detection device for a container yard in an exemplary embodiment of the utility model (position encoder omitted);

[0034] Figure 3 This is a schematic diagram of the cooperation between the detection mechanism and the busbar in an exemplary embodiment of the utility model (the busbar is in a state without defects);

[0035] Reference numerals:

[0036] Fixing mechanism 100: mounting frame 110, support base 111, spring connecting rod 120, connecting bolt 130, bottom bolt 140;

[0037] Detection mechanism 200: guide wheel probe 210, mounting bolt 211, telescopic connecting rod 220, nut 221, elastic element 230, L-shaped conductive rod 240, contact 241, upper contact piece 251, lower contact piece 252, transverse partition 260, alarm lamp 271, operation switch 272, three-core convenient interface 273, auxiliary guide wheel 280;

[0038] Alarm and recording system 300: crane PLC 310, position encoder 320, notch alarm buzzer 330, protrusion alarm buzzer 340;

[0039] Trolley wire 400. Detailed implementation manners

[0040] The attached drawings are only for illustrative purposes and should not be construed as a limitation of this patent;

[0041] To better illustrate this embodiment, some components in the attached drawings are omitted, enlarged or reduced, and do not represent the dimensions of the actual product;

[0042] For those skilled in the art, it is understandable that some well-known structures and their descriptions in the attached drawings may be omitted;

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be said that the interiors of two elements are in communication. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the attached drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0044] The technical solutions of the present invention will be further described below with reference to the attached drawings and embodiments.

[0045] As Figures 1 to 3As shown in the figure, a defect detection device for a low-voltage sliding contact wire in a container yard according to an exemplary embodiment of the present invention includes a fixing mechanism 100, a detection mechanism 200, and an alarm and recording system 300. Among them, the fixing mechanism is detachably installed on the power-taking trolley platform of the yard crane (not shown in the figure), and the detection mechanism is detachably installed on the fixing mechanism. In this way, the detection mechanism can move synchronously with the power-taking trolley to perform real-time detection of the sliding contact wire without additionally installing a power drive component.

[0046] The detection mechanism 200 is elastically installed with a guide wheel probe 210 for extending into the guide groove of the sliding contact wire. During the movement of the power-taking trolley, the guide wheel probe 210 can be telescoped up and down along with the defects at the bottom of the guide groove of the sliding contact wire, and always keep rolling and fitting with the bottom of the guide groove of the sliding contact wire. In this way, the device converts the change in the guide groove structure caused by the defect of the sliding contact wire into the position change of the guide wheel probe, and senses the defect through the direct contact between the guide wheel probe and the bottom of the guide groove of the sliding contact wire. It should be noted that the guide wheel probe in this device is made of a material with good insulation, high temperature resistance, and high hardness.

[0047] The alarm and recording system 300 is electrically connected to the detection mechanism 200, and issues an alarm and records the defect in response to the displacement of the guide wheel probe 210 telescoping up and down exceeding the warning value.

[0048] The detection mechanism 200 includes a rectangular housing and a telescopic connecting rod 220. The telescopic connecting rod is connected to the inner wall of the housing through an elastic element 230. The upper end of the telescopic connecting rod extends out of the upper surface of the housing movably, and the guide wheel probe 210 is installed at the upper end of the telescopic connecting rod 220. In this way, it is convenient for the guide wheel probe to extend into the guide groove of the sliding contact wire, and it is convenient to use the acting force of the elastic element to realize the telescopic movement of the guide wheel probe up and down along with the defects at the bottom of the guide groove of the sliding contact wire.

[0049] In some embodiments, an L-shaped conductive rod 240 is fixed to the lower end of the telescopic connecting rod 220. The vertical rod of the L-shaped conductive rod is coaxial with the telescopic connecting rod, and the bent part is located at the lower part inside the housing and a contact head 241 is provided at the end; an upper contact piece 251 and a lower contact piece 252 are oppositely installed inside the housing. The contact heads are equally spaced between the upper contact piece and the lower contact piece. When the displacement of the guide wheel probe 210 telescoping up and down exceeds the warning value, the contact head contacts the corresponding contact piece. It should be understood that the contact head and the upper and lower contact pieces are used for electrical connection, and the distance between the contact head and the upper and lower contact pieces needs to meet the set warning value. The setting of the warning value needs to comprehensively consider the model and use requirements of the sliding contact wire. Taking our port as an example, a large number of on-site inspection and measurement data of a certain model of sliding contact wire are: the abnormal value of the notch depth is 3-4 mm, and the abnormal value of the protrusion height is 3-10 mm. When the notch depth / protrusion height exceeds 4 mm, our port will issue a damage assessment form for repair. Then the warning value can be set to 4 mm, and the distances between the contact head and the upper and lower contact pieces are both 4 mm.

[0050] Between the above-mentioned contact and the upper and lower contact pieces, when a notch appears at the bottom of the sliding contact wire guide groove, the contact 241 moves upward and approaches the upper contact piece 251. When the depth of the notch exceeds the warning value, the contact 241 moves upward until it contacts the upper contact piece 251, thereby triggering the corresponding actions of the alarm and recording system 300; when a protrusion appears at the bottom of the sliding contact wire guide groove, the contact 241 moves downward and approaches the lower contact piece 252. When the height of the protrusion exceeds the warning value, the contact 241 moves downward until it contacts the lower contact piece 252, thereby triggering the corresponding actions of the alarm and recording system 300.

[0051] In some embodiments, a horizontal partition 260 with a through hole in the center is provided below the telescopic link 220 inside the housing. The vertical rod of the L-shaped conductive rod 240 is movably inserted through the central through hole of the horizontal partition, and the bent portion is located below the horizontal partition. It should be noted that the housing, the telescopic link, and the horizontal partition are all made of insulating materials.

[0052] The elastic element 230 is selected as a spring. One end of the spring is fixed to the lower end of the telescopic link 220, and the other end is fixed to the horizontal partition 260. Moreover, the spring is sleeved on the outer periphery of the vertical rod of the L-shaped conductive rod 240. With such a setting, the elastic installation of the telescopic link inside the housing can be better realized, and then the elastic installation of the guide wheel probe can be realized. After the device is installed in place, initially (at the non-defective part of the sliding contact wire), the spring is compressed, providing an upward pre-tightening force. When a notch appears at the bottom of the sliding contact wire guide groove, the spring extends but is still in a compressed state, providing an upward pre-tightening force. When a protrusion appears at the bottom of the sliding contact wire guide groove, the spring is further compressed, providing an upward pre-tightening force. In this way, it is ensured that the guide wheel probe 210 always remains in rolling contact with the bottom of the sliding contact wire guide groove, ensuring effective detection.

[0053] It should be noted that other installation structures can also be used to realize the elastic installation of the telescopic link 220 inside the housing. For example, a connecting cross bar is provided at the lower end of the telescopic link, and two springs are symmetrically arranged with respect to the vertical rod of the L-shaped conductive rod and their two ends are respectively fixed to the connecting cross bar and the horizontal partition (not shown in the figure). In addition, the above-mentioned elastic element 230 can also be other elastic components, such as rubber tubes, bellows, and so on.

[0054] In some embodiments, the alarm and recording system 300 is composed of the existing crane PLC 310 and position encoder 320 (i.e., the position encoder used in the crane trolley positioning system) of the yard crane, as well as a notch alarm buzzer 330 and a protrusion alarm buzzer 340 provided in the crane operation cab. The notch alarm buzzer, the protrusion alarm buzzer, and the position encoder are all electrically connected to the crane PLC.

[0055] The detection mechanism 200 further includes an alarm lamp 271 and an operation switch 272 that are electrically connected. The alarm lamp and the operation switch are arranged on the side wall of the housing. The operation switch 272 is electrically connected to the L-shaped conductive rod 240. A three-core convenient interface 273 is also provided on the side wall of the housing. The alarm lamp 271, the upper contact piece 251, and the lower contact piece 252 are all electrically connected to the three-core convenient interface 273. Electrically connecting the crane PLC to the three-core convenient interface realizes the electrical connection between the alarm and recording system and the detection mechanism.

[0056] Among them, the three-core convenient interface 273 can be used not only to connect the crane PLC to automatically detect the sliding contact wire 400, but also to access a temporary 24V power supply during manual detection. The operation switch 272 is used to manually turn on / off the detection function. The alarm lamp 271 lights up when there is a defect at the bottom of the sliding contact wire guide groove and the defect causes the contact 241 to contact the corresponding contact piece to conduct the circuit, which is especially convenient for on-site observation by personnel during manual detection without directly visually inspecting the narrow sliding contact wire guide groove. It should be noted that the manual detection here means that the detection mechanism 200 is installed on a handheld insulating rod, and the operator walks with the insulating rod in hand to detect the sliding contact wire. The power supply, alarm lamp, operation switch, contact, upper and lower contact pieces externally connected through the three-core convenient interface 273 form a common detection circuit. This manual detection can be used as a supplement to the automatic detection, facilitating convenient detection when the management personnel need to focus on individual defects.

[0057] In some embodiments, the outer periphery of the upper end of the telescopic link 220 is provided with an external thread for threadedly connecting the guide wheel probe 210 and facilitating the adjustment of the position height of the guide wheel probe to adapt to different models of sliding contact wires 400. Further optionally, the lower part of the guide wheel probe 210 is an installation bolt 211, and the nut end of the installation bolt faces downward and has an internal thread hole at the nut end.

[0058] It should be understood that for different models of sliding contact wires, the depth of their guide grooves is usually different. With the above settings, it is convenient to install the guide wheel probe 210 to the top of the telescopic link 220 through the cooperation of the internal thread hole and the external thread, and at the same time, it is convenient to adjust the position height of the guide wheel probe to be applicable to different models of sliding contact wires 400.

[0059] In some embodiments, a nut 221 is also connected to the external thread of the telescopic link 220. After the guide wheel probe 210 is installed and adjusted in place through the installation bolt 211, the nut 221 is screwed upward to abut against the installation bolt 211 to lock the position of the guide wheel probe 210 relative to the telescopic link 220.

[0060] In some embodiments, two auxiliary guide wheels 280 are mounted on the upper surface of the housing. The two auxiliary guide wheels are symmetrically located on both sides of the guide wheel probe 210 and are used to rollingly cooperate with the guide wheel grooves on both sides of the trolley wire sheath. In this device, the auxiliary guide wheels 280 are made of materials with good insulation, high temperature resistance, and high hardness, and are used to ensure the stable movement of the detection mechanism 200 on the trolley wire 400 and play a role in correcting deviation.

[0061] In some preferred embodiments, the fixing mechanism 100 includes a mounting frame 110. The mounting frame is a planar four-bar linkage mechanism, which is a closed quadrilateral, and adjacent linkages are connected by hinge shafts, that is, the mounting frame is a quadrilateral frame structure with degrees of freedom.

[0062] Furthermore, after the above-mentioned mounting frame 110 is installed, a set of opposite linkages are erected. One of the vertical linkages has a support seat 111, and a spring linkage 120 is connected between the lower hinge shaft of the vertical linkage and the upper side linkage of the mounting frame near the diagonal. The mounting frame 110 and the spring linkage 120 cooperate to provide an upward pre-tightening force. In addition, the elastic element 230 in the detection mechanism 200 provides an upward pre-tightening force. In this way, even if there are small bumps during the movement of the crane due to uneven road surfaces and other reasons, the two auxiliary guide wheels 280 always remain in rolling contact with the guide wheel grooves on both sides of the trolley wire sheath, and at the same time, the guide wheel probe 210 always remains in rolling contact with the bottom of the trolley wire guide groove. That is to say, the detection mechanism 200 is stationary relative to the trolley wire 400 in the direction perpendicular to its traveling direction. In this way, it is ensured that the position change of the guide wheel probe 210 during the mobile detection process is completely caused by the defects at the bottom of the trolley wire guide groove, ensuring the detection quality.

[0063] Another vertical linkage of the above-mentioned mounting frame 110 is connected with a connecting block, and the connecting block is fastened to the power-taking trolley platform of the yard crane through two connecting bolts 130, so as to realize the detachable installation of the fixing mechanism 100 on the power-taking trolley platform of the yard crane. The detection mechanism 200 is vertically installed on the upper surface of the support seat through a bottom bolt 140 passing through the support seat 111, and the guide wheel probe 210 is perpendicular to the trolley wire 400.

[0064] When using this device to detect the defects of the low-level trolley wire in the container yard, first complete the installation of the detection mechanism and the fixing mechanism. During installation, pay attention to adjusting the height position of the guide wheel probe according to the depth of the trolley wire guide groove of the corresponding model, so that the guide wheel probe fits to the bottom of the trolley wire guide groove, and the two auxiliary guide wheels fit to the guide wheel grooves on both sides of the trolley wire sheath, reaching the initial state of detecting the low-level trolley wire in the yard (the normal state corresponding to no defects in the trolley wire), and then electrically connect the detection mechanism to the alarm and recording system.

[0065] During the detection process of the device moving with the power-taking trolley, the guide wheel probe undergoes rolling friction with the bottom of the sliding contact line groove. When there are no defects in the sliding contact line, the detection mechanism runs smoothly along the sliding contact line, the guide wheel probe presses against the bottom of the groove and walks, and there is no change in the position of the guide wheel probe extending upward or retracting downward. The contact does not contact any contact piece, and the circuit is not turned on, so the alarm and recording system are not triggered.

[0066] When there is a notch at the bottom of the sliding contact line groove, under the action of the spring tension in the detection mechanism, the telescopic connecting rod extends upward (the guide wheel probe presses against the notch at the bottom of the groove), driving the contact to move upward. When the extension amount exceeds the warning value, the contact contacts the upper contact piece, and the notch alarm buzzer circuit is turned on. When the crane PLC receives the notch signal, it obtains the position of the yard and bay where the yard crane is located through the position encoder. At the same time, the crane PLC sends out an alarm signal and records the defect. After receiving the alarm, the driver in the operation room can report the fault, contact the maintenance personnel, stop the machine for on-site inspection, and judge whether the equipment can be moved away for maintenance.

[0067] When there is a protrusion at the bottom of the sliding contact line groove, under the further compression of the spring in the detection mechanism, the telescopic connecting rod retracts downward (the guide wheel probe presses against the protrusion at the bottom of the groove), driving the contact to move downward. When the retraction amount exceeds the warning value, the contact contacts the lower contact piece, and the protrusion alarm buzzer circuit is turned on. When the crane PLC receives the protrusion signal, it obtains the position of the yard and bay where the yard crane is located through the position encoder. At the same time, the crane PLC sends out an alarm signal and records the defect. After receiving the alarm, the driver in the operation room can report the fault, contact the maintenance personnel, stop the machine for on-site inspection, and judge whether the equipment can be moved away for maintenance.

[0068] It should be noted that during daily operations, the workers work in three shifts, and each shift reports the updated defect situation records.

[0069] Using this device can better realize the automatic detection, positioning and recording of the defects of the low-voltage sliding contact line in the container yard, including: counting the types of defects existing in the low-voltage sliding contact line in the yard, such as notches and protrusions; counting the position distribution of different types of defects, which helps to find out whether there are multiple occurrences of this type of defect, so as to take targeted measures; counting the number of different types of defects (the repaired and unrepaired defects of each type). In this way, it is convenient for the management personnel to more clearly understand the problems existing in the low-voltage sliding contact line in the yard, take measures to improve in time, and improve safety.

[0070] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and its concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A container yard low-rack busbar defect detection device, characterized in that: include: The fixing mechanism can be detachably installed on the platform of the power-taking trolley of the yard crane; The detection mechanism is detachably mounted on the fixing mechanism and moves synchronously with the power-taking trolley. The detection mechanism is elastically mounted with a guide wheel probe made of insulating material, which is used to extend into the busbar guide groove. During the movement of the power-taking trolley, the guide wheel probe can be extended and retracted up and down according to the defects at the bottom of the busbar guide groove, and always keeps rolling and fitting the bottom of the busbar guide groove; The alarm and recording system is electrically connected to the detection mechanism, and in response to the displacement of the guide wheel probe extending and retracting upward and downward exceeding the warning value, an alarm is issued and the defect is recorded.

2. The container yard low-frame busbar defect detection device according to claim 1 is characterized in that: The detection mechanism comprises a housing and a telescopic connecting rod, wherein the telescopic connecting rod is connected to the inner wall of the housing via an elastic element, and the upper end of the telescopic connecting rod movably extends out of the upper surface of the housing; The guide wheel probe is installed on the upper end of the telescopic connecting rod.

3. The container yard low-frame busbar defect detection device according to claim 2 is characterized in that: An L-shaped conductive rod is fixed to the lower end of the telescopic connecting rod, the vertical rod of the L-shaped conductive rod is coaxial with the telescopic connecting rod, the bending part is located at the lower part of the shell and a contact is provided at the end; An upper contact piece and a lower contact piece are relatively installed in the shell, and the contact head is located between the upper contact piece and the lower contact piece at equal intervals. When the displacement of the guide wheel probe extending and retracting up and down exceeds the warning value, the contact head contacts the corresponding contact piece.

4. The container yard low-frame busbar defect detection device according to claim 3 is characterized in that: A transverse partition with a through hole in the center is provided in the housing below the telescopic connecting rod, the vertical rod of the L-shaped conductive rod is movably inserted into the central through hole of the transverse partition, and the bent portion is located below the transverse partition; The elastic element is a spring, one end of which is fixed to the lower end of the telescopic connecting rod and the other end is fixed to the cross partition, and the spring is sleeved on the outer periphery of the vertical rod of the L-shaped conductive rod; the spring provides an upward preload force so that the guide wheel probe always keeps rolling and fitting the bottom of the busbar guide groove.

5. The container yard low-frame busbar defect detection device according to claim 3 is characterized in that: The alarm and recording system includes a crane PLC, a gap alarm buzzer, a protrusion alarm buzzer and a position encoder, and the gap alarm buzzer, the protrusion alarm buzzer and the position encoder are all electrically connected to the crane PLC; The detection mechanism also includes an alarm light and an operating switch which are electrically connected to each other. The alarm light and the operating switch are arranged on the side wall of the housing. The operating switch is electrically connected to the L-shaped conductive rod. The side wall of the housing is also provided with a three-core convenient interface. The alarm light, the upper contact piece and the lower contact piece are all electrically connected to the three-core convenient interface. The crane PLC is electrically connected to the three-core convenient interface, thereby realizing the electrical connection between the alarm and recording system and the detection mechanism.

6. The container yard low-rise busbar defect detection device according to claim 2 is characterized in that: The outer periphery of the upper end of the telescopic connecting rod is provided with an external thread for threaded connection with the guide wheel probe and conveniently adjusting the position height of the guide wheel probe to adapt to different types of busbars.

7. The container yard low-frame busbar defect detection device according to claim 6 is characterized in that: The lower part of the guide wheel probe is a mounting bolt, the nut end of the mounting bolt faces downward, and an internal threaded hole is opened at the nut end.

8. The container yard low-frame busbar defect detection device according to claim 7 is characterized in that: The external thread of the telescopic connecting rod is also connected with a nut. When the guide wheel probe is installed and adjusted into place by the mounting bolts, the nut is used to screw upwards and tighten against the mounting bolts.

9. The container yard low-rise busbar defect detection device according to any one of claims 2 to 8, characterized in that: Two auxiliary guide wheels are installed on the upper surface of the shell. The two auxiliary guide wheels are symmetrically located on both sides of the guide wheel probe to roll and fit in the guide wheel grooves on both sides of the busbar sheath.

10. The container yard low-rise busbar defect detection device according to claim 9 is characterized in that: The fixing mechanism comprises a mounting frame, which is a planar four-bar linkage mechanism in a closed quadrilateral shape, and adjacent links are connected by hinge axes; After the installation of the mounting frame, a group of relative connecting rods are erected, one of which has a supporting seat, and a spring connecting rod is connected between the hinge axis at the lower end of the vertical connecting rod and the upper connecting rod of the mounting frame near the diagonal position. The mounting frame and the spring connecting rod work together to ensure that the two auxiliary guide wheels always keep rolling and fitting the guide wheel grooves on both sides of the busbar sheath; The detection mechanism is vertically installed on the upper surface of the support seat by means of bolts penetrating the bottom of the support seat, and the guide wheel probe is perpendicular to the busbar; Another vertical connecting rod of the placement frame is fastened to the power-taking trolley platform of the yard crane through connecting bolts.

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