Underwater hydraulic grab beam on-line insulation detection device

Abstract

The utility model provides an online insulation detection device of underwater hydraulic grab beam, including seal shell, the upside of seal shell is provided with the apron, the inner wall of seal shell is installed with insulation detection appearance main part, one side of seal shell inner wall is rotatively matched with the reel, is wound with the connecting wire that is provided on the reel, the side fixedly connected with the clockwork spring of seal shell inner wall is close to the reel. Through setting reel, clockwork spring and clamping positioning mechanism, can carry out reel adjustment and positioning fixation to connecting wire, improve the messy problem caused by traditional cable direct overhang or simple binding, reel cooperation clockwork spring can adapt the wire length along with the change of grab beam water depth, improve the cable accumulation jam when deep water, the situation of tight damage when shallow, clamping positioning mechanism avoids the signal interruption caused by wire pulling, can also reduce the radial tension of joint, improve the aging and water seepage risk of quick connector plug seal, satisfy the efficient and safe demand of underwater operation.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy engineering technology, specifically to an online insulation detection device for underwater hydraulic grab beams. Background Technology

[0002] In the field of underwater maintenance of water conservancy projects, underwater hydraulic grab beams are the core equipment for achieving precise grabbing and positioning of gates. The insulation performance of its electrical system needs to be monitored in real time by online insulation testing devices. Although the current testing devices can complete the insulation resistance acquisition, the connection cables between the device and the grab beam pump station lack a dedicated fixing and winding structure. In actual applications, they are often directly suspended or simply tied, without a winding mechanism suitable for underwater working conditions.

[0003] The existing cable management method has shortcomings: the lack of a rewinding and adjustment function makes it impossible for the cable length to adapt to changes in water depth. In deep water, excessively long cables are prone to accumulation and jamming, while in shallow water, they are prone to tension damage due to tightness. Furthermore, the lack of a positioning and fixing structure causes the cable joints to be subjected to radial tension for a long time, which accelerates the aging of the quick-connect plug seals and increases the risk of underwater water leakage. At the same time, messy cables can also interfere with the maintenance personnel's inspection and operation of the pump station, prolonging working hours and making it difficult to meet the needs of efficient and safe underwater operations. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an online insulation detection device for underwater hydraulic grab beams to solve the problems mentioned in the background. This invention features a novel structure. By incorporating a winding reel, a spring, and a clamping and positioning mechanism, it can adjust and fix the connecting wires, improving the messy problems caused by traditional direct cable hanging or simple binding. The winding reel, combined with the spring, can adapt to changes in water depth to adjust the wire length, improving the situation of cable accumulation and jamming in deep water and tightness and damage in shallow water. Simultaneously, the clamping and positioning mechanism prevents signal interruption caused by wire pulling, reduces radial tension at the joint, and mitigates the risk of aging and water leakage of quick-connect plug seals, meeting the high efficiency and safety requirements of underwater operations.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an underwater hydraulic grab beam online insulation detection device, comprising a sealing shell, a cover plate on the upper side of the sealing shell, an insulation detector body installed on the inner wall of the sealing shell, a winding reel rotatably fitted on one side of the inner wall of the sealing shell, a connecting wire wound on the winding reel, a spring fixedly connected to the inner wall of the sealing shell near the winding reel, an installation shell installed on one side of the inner wall of the sealing shell, a clamping and positioning mechanism cooperating with the connecting wire being provided inside the installation shell, a clamping plate fixedly connected to one side of the sealing shell, and a clamping plate connecting shell slidably fitted to the outer side of the clamping plate.

[0006] Furthermore, the movable end of the spring is fixedly connected to one side of the winding reel, the cover plate and the sealing shell are fixedly connected by a self-locking bolt, one end of the connecting wire is connected to the main body of the insulation detector, the plug end of the connecting wire extends to the outside of the sealing shell, and the connection between the connecting wire and the sealing shell is sealed.

[0007] Furthermore, the clamping and positioning mechanism includes a scissor-type connecting rod rotatably fitted on the inner wall of the mounting housing. Clamping blocks are fixedly connected to opposite sides of the lower end of the scissor-type connecting rod. Two rollers are rotatably fitted on the upper end of the scissor-type connecting rod. A trapezoidal extrusion block is slidably fitted on the upper end of the mounting housing. A rotating shaft is rotatably fitted on one side of the sealing housing. An extrusion cam is fixedly connected to the end of the rotating shaft near the trapezoidal extrusion block. A knob is fixedly connected to the outer end of the rotating shaft. Springs are fixedly connected to both sides of the inner wall of the mounting housing.

[0008] Furthermore, the extrusion end of the trapezoidal extrusion block contacts two rollers, the extrusion cam cooperates with the upper end of the trapezoidal extrusion block, the opposite ends of the two springs are respectively fixedly connected to both sides of the scissor rod, the lower end of the scissor rod is slidably fitted on the inner wall of the mounting shell, and the opposite ends of the two clamping blocks cooperate with the outer side of the connecting wire.

[0009] Furthermore, two mounting slots are provided on the upper side of the card plate, and a pull plate is slidably arranged inside the mounting slot. The pull plate and the mounting slot are elastically fitted. A plug rod is fixedly connected to the opposite side of each of the two pull plates. Slots are provided on both sides of the inner wall of the card plate connecting shell.

[0010] Furthermore, the insertion rod is slidably fitted on both sides of the card plate, and the insertion rod is engaged with the slot.

[0011] Furthermore, an observation window is provided on the upper side of the cover plate, and a sealing gasket that mates with the cover plate is installed on the upper side of the sealing shell.

[0012] The beneficial effects of this utility model are: 1. This utility model, by setting up a winding reel, a spring, and a clamping and positioning mechanism, can adjust and fix the connecting wires, improving the messy problem caused by the direct hanging or simple binding of traditional cables; the winding reel, together with the spring, can adapt to the change of water depth of the grab beam to the length of the wire, improving the situation of cable accumulation and jamming in deep water and tightness and damage in shallow water; at the same time, the clamping and positioning mechanism avoids signal interruption caused by wire pulling, and can also reduce radial tension at the joint, improve the risk of aging and water leakage of quick connector seals, and meet the high efficiency and safety requirements of underwater operations.

[0013] 2. This utility model achieves rapid installation and disassembly of the device by setting a snap-fit ​​structure between the card plate and the card plate connecting shell, combined with the elastic cooperation of the pull plate, the plug rod and the slot, without the need for complicated tools, thus improving the problem of time-consuming traditional installation and disassembly, reducing maintenance time and improving maintenance convenience. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the underwater hydraulic grab beam online insulation detection device of this utility model; Figure 2 This is a schematic diagram of the sealing shell separation structure of the underwater hydraulic grab beam online insulation detection device of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the clamping plate of the underwater hydraulic grab beam online insulation detection device of this utility model; Figure 4 This utility model relates to an online insulation detection device for underwater hydraulic grab beams. Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a schematic diagram of the mounting shell structure of the underwater hydraulic grab beam online insulation detection device of this utility model; Figure 6 This is a schematic diagram of the clamping and positioning mechanism of the underwater hydraulic grab beam online insulation detection device of this utility model; Figure 7 This is a schematic diagram illustrating the insulation monitoring principle of the underwater hydraulic grab beam online insulation detection device of this utility model.

[0015] In the diagram: 1. Sealing shell; 2. Cover plate; 3. Main body of insulation tester; 4. Rewinding reel; 5. Connecting wire; 6. Spring; 7. Mounting shell; 8. Clamping and positioning mechanism; 81. Scissor linkage; 82. Clamping block; 83. Roller; 84. Trapezoidal extrusion block; 85. Rotating shaft; 86. Extrusion cam; 87. Knob; 88. Spring; 9. Clamping plate; 10. Clamping plate connecting shell; 11. Mounting groove; 12. Pull plate; 13. Insert rod; 14. Slot; 15. Observation window; 16. Sealing gasket. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] Please refer to Figures 1 to 7This utility model provides a technical solution: an underwater hydraulic grab beam online insulation detection device, including a sealing shell 1, a cover plate 2 on the upper side of the sealing shell 1, an insulation detector body 3 installed on the inner wall of the sealing shell 1, a winding reel 4 rotatably fitted on one side of the inner wall of the sealing shell 1, a connecting wire 5 wound on the winding reel 4, a spring 6 fixedly connected to the inner wall of the sealing shell 1 near the winding reel 4, an installation shell 7 installed on one side of the inner wall of the sealing shell 1, a clamping and positioning mechanism 8 that cooperates with the connecting wire 5 is provided inside the installation shell 7, a clamping plate 9 fixedly connected to one side of the sealing shell 1, and a clamping plate connecting shell 10 slidably fitted to the outer side of the clamping plate 9. The movable end of the spring 6 is fixedly connected to one side of the winding reel 4, the cover plate 2 is fixedly connected to the sealing shell 1 by a self-locking bolt, one end of the connecting wire 5 is connected to the insulation detector body 3, the plug end of the connecting wire 5 extends to the outer side of the sealing shell 1, and the connection between the connecting wire 5 and the sealing shell 1 is sealed. First, the main body 3 of the insulation detector is installed on the inner wall of the sealed shell 1. The winding reel 4 is rotated and fitted on one side of the inner wall of the sealed shell 1 and the connecting wire 5 is wound around it. The spring 6 is fixed on the inner wall of the sealed shell 1 near the winding reel 4, and its movable end is connected to the winding reel 4. The mounting shell 7 is installed on the inner wall of the sealed shell 1 and has a clamping and positioning mechanism 8 inside. The clamping plate 9 is fixed on one side of the sealed shell 1, and its outer side is slidably fitted with the clamping plate connecting shell 10. Then, the cover plate 2 is fixed on the upper side of the sealed shell 1 with self-locking bolts. One end of the connecting wire 5 is connected to the main body 3 of the insulation detector, and its plug end passes through the sealed shell 1 and is sealed. This assembly method realizes the orderly assembly of the core components of the device. The sealing structure and winding design ensure underwater sealing and avoid wire mess, laying the foundation for subsequent testing.

[0018] In this embodiment, the clamping and positioning mechanism 8 includes a scissor-type connecting rod 81 rotatably fitted on the inner wall of the mounting shell 7. Clamping blocks 82 are fixedly connected to opposite sides of the lower end of the scissor-type connecting rod 81. Two rollers 83 are rotatably fitted on the upper end of the scissor-type connecting rod 81. A trapezoidal extrusion block 84 is slidably fitted on the upper end of the mounting shell 7. A rotating shaft 85 is rotatably fitted on one side of the sealing shell 1. An extrusion cam 86 is fixedly connected to the end of the rotating shaft 85 near the trapezoidal extrusion block 84. A knob 87 is fixedly connected to the outer end of the rotating shaft 85. Springs 88 are fixedly connected to both sides of the inner wall of the mounting shell 7. The extrusion end of the trapezoidal extrusion block 84 contacts the two rollers 83. The extrusion cam 86 engages with the upper end of the trapezoidal extrusion block 84. Opposite ends of the two springs 88 are fixedly connected to both sides of the scissor-type connecting rod 81. The lower end of the scissor-type connecting rod 81 slidably fits on the inner wall of the mounting shell 7. Opposite ends of the two clamping blocks 82 engage with the outer side of the connecting wire 5. The clamping and positioning mechanism 8 is normally closed. In its natural state, the spring force of spring 88 causes the scissor linkage 81 to retract, thereby clamping the connecting wire 5 through the clamping block 82. When the wire length needs to be adjusted, the knob 87 is turned, which drives the compression cam 86 to rotate via the rotating shaft 85. The cam 86 presses down on the trapezoidal compression block 84, causing it to slide downwards. The inclined surface of the trapezoidal compression block 84 then presses against the two rollers 83, forcing the upper end of the scissor linkage 81 to open, and its lower end drives the clamping block 82 to overcome the spring force of spring 88 and separate, thereby releasing the connecting wire 5. After adjusting to the desired length, the knob 87 is turned in the opposite direction to release the pressure of cam 86 on the trapezoidal compression block 84, and spring 88 can then drive the entire clamping mechanism to reset and re-clamp the wire. This operation method can flexibly fix or release the connecting wire 5, prevent the wire from shifting during device operation, ensure stable signal transmission, and improve detection reliability.

[0019] In this embodiment, two mounting slots 11 are provided on the upper side of the card plate 9. A pull plate 12 is slidably disposed inside the mounting slot 11, and the pull plate 12 and the mounting slot 11 are elastically engaged. A plug rod 13 is fixedly connected to the opposite side of each of the two pull plates 12. Slots 14 are provided on both sides of the inner wall of the card plate connecting shell 10. The plug rod 13 is slidably engaged on both sides of the card plate 9, and the plug rod 13 is engaged with the slot 14. An observation window 15 is provided on the upper side of the cover plate 2, and a sealing gasket 16 that mates with the cover plate 2 is installed on the upper side of the sealing shell 1. When installing and fixing the device, pull the pull plate 12 in the mounting slot 11 of the clamping plate 9 to retract the insertion rod 13, slide the clamping plate 9 into the clamping plate connecting shell 10, release the pull plate 12, and the insertion rod 13 will spring into the slot 14 of the clamping plate connecting shell 10 to complete the engagement. The clamping plate connecting shell 10 can be fixed in the corresponding position of the pump station through the reserved holes, which facilitates the connection of the multi-core waterproof aviation plug (model: WS20-12Z, 12-core) at one end of the connecting wire 5 to the corresponding WS20-12J aviation socket on the side of the grab beam pump station. The status of the internal components can be viewed through the observation window 15 of the cover plate 2. This assembly method realizes the quick fixing and disassembly of the device, which is convenient for inspection and maintenance. The observation window 15 is designed to monitor the internal situation in real time, reduce the frequency of opening the cover, and reduce the risk of seal failure.

[0020] When using the device, assemble and fix it according to the above process. Install the device in the designated position through the snap-fit ​​structure of the snap-fit ​​plate 9 and the snap-fit ​​plate connecting shell 10. During testing, according to the water depth requirements of the grab beam, use the cooperation of the winding reel 4 and the spring 6 to pull out or retract the connecting wire 5. Turn the knob 87 to unlock the clamping and positioning mechanism 8, so that the clamping block 82 releases the connecting wire 5. After pulling to a suitable length, release the knob 87. Under the action of the spring 88, the connecting wire 5 is clamped and fixed. After adjusting to a suitable length, connect the plug to the socket set on the side of the grab beam pump station. The socket is pre-connected to the pump station motor circuit terminal. During installation, simply align the quick-connect plug of the insulation detector body 3 with the socket and insert it to complete the line connection. No on-site wiring is required. The insulation detector body 3 collects insulation data in real time through the wire. The staff can check the internal status through the observation window 15. If adjustment or maintenance is required, turn the knob 87 to release the wire and pull the pull plate 12 to disassemble the device. The underwater sealing and wire stability are guaranteed throughout the process, realizing efficient and reliable online insulation testing. refer to Figure 7 Normal operating conditions: +24V and -24V power supplies power the insulation monitoring device. The device continuously monitors the insulation status of the underwater grab beam electrical circuit through lines such as 2A52, B52, and C5. If the insulation is normal, the monitoring device does not output an alarm signal, and the audible and visual alarm lights do not activate. The operator in the crane cab controls the hydraulic grab beam pump station motor and A3 oil pump motor through the <2KM4 and 2KM4 contactors to achieve the grab beam operation. Abnormal insulation condition: When the underwater grab beam experiences an insulation fault (such as leakage) due to underwater environmental corrosion, line damage, or other reasons, the insulation monitoring device detects that the insulation resistance is lower than the safe value and immediately sends a signal to the audible and visual alarm light through the "alarm output" interface. The audible and visual alarm light triggers an audible and visual alarm, alerting the crane operator in the cab of the fault. The operator can then promptly disconnect the <2KM4 contactor, disconnect the power supply to the pump station motor and oil pump motor, stop operations, and troubleshoot the fault to avoid risks such as electric shock and equipment damage.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An online insulation detection device for underwater hydraulic grab beams, comprising a sealed housing (1), characterized in that: The upper side of the sealing shell (1) is provided with a cover plate (2), the inner wall of the sealing shell (1) is installed with an insulation detector body (3), a winding reel (4) is rotatably fitted on one side of the inner wall of the sealing shell (1), a connecting wire (5) is wound on the winding reel (4), a spring spring (6) is fixedly connected to the inner wall of the sealing shell (1) near the winding reel (4), an installation shell (7) is installed on one side of the inner wall of the sealing shell (1), a clamping and positioning mechanism (8) that cooperates with the connecting wire (5) is provided inside the installation shell (7), a clamping plate (9) is fixedly connected to one side of the sealing shell (1), and a clamping plate connecting shell (10) is slidably fitted on the outer side of the clamping plate (9).

2. The underwater hydraulic grab beam online insulation detection device according to claim 1, characterized in that: The movable end of the spring (6) is fixedly connected to one side of the winding reel (4), the cover plate (2) is fixedly connected to the sealing shell (1) by a self-locking bolt, one end of the connecting wire (5) is connected to the main body (3) of the insulation detector, the plug end of the connecting wire (5) extends to the outside of the sealing shell (1), and the connection between the connecting wire (5) and the sealing shell (1) is sealed.

3. The underwater hydraulic grab beam online insulation detection device according to claim 1, characterized in that: The clamping and positioning mechanism (8) includes a scissor rod (81) rotatably fitted on the inner wall of the mounting shell (7). A clamping block (82) is fixedly connected to the opposite side of the lower end of the scissor rod (81). Two rollers (83) are rotatably fitted on the upper end of the scissor rod (81). A trapezoidal extrusion block (84) is slidably fitted on the upper end of the mounting shell (7). A rotating shaft (85) is rotatably fitted on one side of the sealing shell (1). An extrusion cam (86) is fixedly connected to the end of the rotating shaft (85) near the trapezoidal extrusion block (84). A knob (87) is fixedly connected to the outer end of the rotating shaft (85). Springs (88) are fixedly connected to both sides of the inner wall of the mounting shell (7).

4. The underwater hydraulic grab beam online insulation detection device according to claim 3, characterized in that: The extrusion end of the trapezoidal extrusion block (84) is in contact with two rollers (83), the extrusion cam (86) is engaged with the upper end of the trapezoidal extrusion block (84), the opposite ends of the two springs (88) are fixedly connected to the two sides of the scissor rod (81), the lower end of the scissor rod (81) is slidably engaged with the inner wall of the mounting shell (7), and the opposite ends of the two clamping blocks (82) are engaged with the outer side of the connecting wire (5).

5. The underwater hydraulic grab beam online insulation detection device according to claim 1, characterized in that: The upper side of the card plate (9) has two mounting slots (11), and a pull plate (12) is slidably arranged inside the mounting slot (11). The pull plate (12) and the mounting slot (11) are elastically matched. A plug rod (13) is fixedly connected to the opposite side of the two pull plates (12). Slots (14) are provided on both sides of the inner wall of the card plate connecting shell (10).

6. The underwater hydraulic grab beam online insulation detection device according to claim 5, characterized in that: The insertion rod (13) is slidably fitted on both sides of the card plate (9), and the insertion rod (13) is engaged with the slot (14).

7. The underwater hydraulic grab beam online insulation detection device according to claim 1, characterized in that: An observation window (15) is provided on the upper side of the cover plate (2), and a sealing gasket (16) that cooperates with the cover plate (2) is installed on the upper side of the sealing shell (1).

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