Air bag for sealing inner hole of low-pressure connecting box

Abstract

An air bag for sealing holes in a low-pressure connecting box comprises a main air bag body and a plurality of auxiliary air bag bodies, the main air bag body is annular and further provided with a notch, the upper end face of the main air bag body is provided with an inflation nozzle, the auxiliary air bag bodies are connected to the main air bag body, and the main air bag body is communicated with the auxiliary air bag bodies. The main air bag of the C-shaped structure can be conveniently installed outside the cable, the inflation nozzle is used for inflating the main air bag, and the inflation nozzle is of a tire air nozzle structure. When in use, the main air bag is sleeved outside the cable, then the auxiliary air bag is inserted into the corresponding interval according to the requirement, the gap in the hole is blocked after the main air bag is inflated, and due to the integral structure and the expansive force of the air bags, the blocking stability is good, and the cable is not easy to fall off.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary tools for maintenance work in hydropower stations, in particular to an air bag for sealing holes in a low-voltage connection box. Background Art

[0002] The interior of the low-voltage connection box of a three-phase combined transformer is used to lay copper conduits. There are three low-voltage lead risers and corresponding holes between the low-voltage connection box and the transformer tank. When operators are inspecting and repairing the transformer, there is a risk that operators and tools and other objects may fall into the transformer. When inspecting equipment such as IPB, GIL, GIS, and GIS connecting bushings, there is also a risk that tools, expansion joints, dust, and other objects may fall into the holes and damage the equipment. To effectively prevent operators, tools, expansion joints, dust, and other objects from falling into the holes or into the equipment, these holes need to be sealed during operations. Figure 6 , Figure 6 This is a top view of the interior of the low-voltage connection box 10. Since three groups of cables 30, A, B, and C, are arranged in these holes 20, and the diameters of the three groups of cables 30, A, B, and C, are relatively large, there are gaps between the cables 30 and between the cables 30 and the holes 20. During previous maintenance, cotton cloth was used for sealing, but the sealing with cotton cloth is not stable and there is a risk of falling. Utility Model Content

[0003] The technical problem to be solved by the present invention is: to solve the problems existing in the above-mentioned background technology, and to provide an airbag for sealing the holes in a low-voltage connection box. The main airbag is put on the outside of the cable, and the auxiliary airbag is inserted into the corresponding interval as needed. After the main airbag is inflated, the gap in the hole is sealed. Due to the overall structure and the expansion force of the airbag, the sealing stability is good and it is not easy to fall off.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a low-pressure connecting box with a closed hole airbag, including a main airbag and multiple auxiliary airbags, the main airbag is annular, and the main airbag is also provided with a notch, the upper end face of the main airbag is provided with an inflation nozzle, multiple auxiliary airbags are connected to the main airbag, and the main airbag is connected to the auxiliary airbag.

[0005] The main airbag and the auxiliary airbag are an integrated structure.

[0006] The auxiliary airbag is detachably mounted on the main airbag.

[0007] The upper end surface of the main airbag is provided with a plurality of connecting air nozzles, and the auxiliary airbag is provided with a docking air nozzle, and the auxiliary airbag is docked with the connecting air nozzle through the docking air nozzle.

[0008] The upper end surface of the main airbag is provided with a plurality of connecting air nozzles, and the auxiliary airbag is provided with a docking air nozzle, and the docking air nozzle of the auxiliary airbag is connected to the connecting air nozzle through a pressure hose.

[0009] The connecting air nozzle, docking air nozzle and inflation nozzle have the same structure. The pressure hose includes a tube body, and internal threaded joints are installed at both ends of the tube body. A thimble is installed in the internal threaded joint. The thimble includes an installation section and an extending section located on one side of the installation section. The installation section is fixedly connected to the internal threaded joint, and the extending section extends outward. The installation section is provided with an air flow channel on the outside of the extending section.

[0010] The auxiliary airbag is cylindrical or capsule-shaped.

[0011] The utility model has the following beneficial effects:

[0012] 1. This utility model utilizes a "C"-shaped main airbag, making it easy to install outside the cable. The inflation nozzle, used to inflate the main airbag, utilizes a tire nozzle structure. During use, the main airbag is placed over the cable, and the auxiliary airbag is inserted into the appropriate gap as needed. After the main airbag is inflated, the gap within the hole is sealed. Due to the overall structure and the expansion force of the airbag, the seal is stable and not easily dropped.

[0013] 2. The auxiliary airbag of the present invention can be detachably mounted on the main airbag, which is convenient for transportation and storage. In addition, if a single auxiliary airbag is damaged, the damaged airbag can be replaced.

[0014] 3. The docking air nozzle of the utility model is connected to the connecting air nozzle through a pressure hose, which can more conveniently adjust the placement of the auxiliary airbag and also reduce the length of the auxiliary airbag.

[0015] 4. When the connecting air nozzle and the docking air nozzle of the utility model are connected to the internal threaded joint, the protruding section of the ejector pin in the threaded joint abuts against the valve core of the air nozzle inward, thereby connecting the main airbag and the auxiliary airbag through the pressure hose. When one of the auxiliary airbags is removed on site, it will not cause a large amount of air leakage in the main airbag. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the main airbag of the utility model.

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the auxiliary airbag of the utility model.

[0020] Figure 4 This is a schematic diagram of the main structure of the pressure hose of the utility model.

[0021] Figure 5 for Figure 4 Schematic diagram of the AA cross-section structure.

[0022] Figure 6 This is a schematic diagram of the top view of the internal holes of the low-voltage connection box.

[0023] Figure 7 This is a schematic diagram of the utility model in use.

[0024] In the figure: main airbag 1, notch 11, connecting air nozzle 12, inflation nozzle 13, auxiliary airbag 2, docking air nozzle 21, pressure hose 3, tube body 31, internal thread connector 32, ejector pin 33, mounting section 331, extension section 332, airflow channel 333;

[0025] Low voltage connection box 10 , hole 20 , cable 30 . DETAILED DESCRIPTION

[0026] like Figure 1-5 As shown, a low-pressure connection box with a hole-enclosed airbag includes a main airbag 1 and 3-5 auxiliary airbags 2. The main airbag 1 is annular and has a notch 11, making the main airbag 1 have a "C" shape. The upper end surface of the main airbag 1 is provided with an inflation nozzle 13. Multiple auxiliary airbags 2 are connected to the main airbag 1, and the main airbag 1 is connected to the auxiliary airbag 2. The "C"-shaped main airbag 1 is easy to install outside the cable 30. The inflation nozzle 13 is used to inflate the main airbag 1. The inflation nozzle 13 adopts the tire air nozzle structure. When in use, refer to Figure 7 By putting the main airbag 1 on the outside of the cable 30, and then inserting the auxiliary airbag 2 into the corresponding interval as needed, after the main airbag 1 is inflated, the gap in the hole 20 is blocked. Due to the overall structure and the expansion force of the airbag, the blocking stability is good and it is not easy to fall.

[0027] In the first embodiment, the main airbag 1 and the auxiliary airbag 2 are integrated into one structure. For example, the auxiliary airbag 2 is bonded to the main airbag 1. Since the auxiliary airbag 2 has a certain length, the position of the auxiliary airbag 2 can be adjusted by bending the auxiliary airbag 2.

[0028] In a preferred embodiment, see Figure 1 The auxiliary airbag 2 is detachably mounted on the main airbag 1, which is convenient for transportation and storage. In addition, when a single auxiliary airbag 2 is damaged, the damaged airbag can be replaced.

[0029] The upper end surface of the main airbag 1 may be provided with a plurality of connecting air nozzles 12, and the auxiliary airbag 2 may be provided with a docking air nozzle 21. The auxiliary airbag 2 is docked with the connecting air nozzle 12 via the docking air nozzle 21. The connecting air nozzle 12 and the docking air nozzle 21 may be docked in the form of a male and female joint of a hydraulic oil pipe.

[0030] In another approach, see Figure 1 The upper end surface of the main airbag 1 is provided with a plurality of connecting air nozzles 12, and the auxiliary airbag 2 is provided with a docking air nozzle 21. The docking air nozzle 21 of the auxiliary airbag 2 is connected to the connecting air nozzle 12 via a pressure hose 3. The provision of the pressure hose 3 makes it easier to adjust the placement of the auxiliary airbag 2 and also reduces the length of the auxiliary airbag 2.

[0031] For details, see Figure 2-5 The connecting air nozzle 12, the docking air nozzle 21, and the inflation nozzle 13 share the same structure. The pressure hose 3 comprises a tube body 31 with internally threaded connectors 32 mounted at both ends. A pin 33 is mounted within the internally threaded connector 32. The pin 33 comprises a mounting section 331 and an extension section 332 located on one side of the mounting section 331. The mounting section 331 is fixedly connected to the internally threaded connector 32, while the extension section 332 extends outward. An airflow channel 333 is provided outside the extension section 332 of the mounting section 331. The connecting air nozzle 12, the docking air nozzle 21, and the inflation nozzle 13 share the same structure, employing valves typically found in automobile tires. When the connecting air nozzle 12 or the docking air nozzle 21 is connected to the internally threaded connector 32, the extension section 332 of the pin 33 within the connector 32 abuts inward against the valve core of the valve, thereby connecting the primary airbag 1 and the secondary airbag 2 through the pressure hose 3. Furthermore, removing one of the secondary airbags 2 on-site will prevent significant air leakage from the primary airbag 1. The mounting section 331 of the ejector pin 33 may be threadedly connected to the internal thread connector 32 or may be fixed by welding.

[0032] Preferably, the auxiliary airbag 2 is cylindrical or capsule-shaped, and has good blocking stability.

[0033] The action process or principle of the utility model is as follows:

[0034] See also Figure 7 During use, the main airbag 1 and the auxiliary airbag 2 are first connected via the pressure hose 3. The main airbag 1 is then slightly inflated and placed over the cable 30. The main airbag 1 is then placed into the hole 20. Due to the initial slight inflation, the main airbag 1 will not fall. The auxiliary airbag 2 is then inserted into the corresponding gap as needed. The main airbag 1 is then inflated using an air pump or compressed air pipe. The main airbag 1 and the auxiliary airbag 2 expand, thus sealing the gap in the hole 20. Due to the overall structure and the expansion force of the airbag, the sealing is stable and not easy to fall.

Claims

1. A low-voltage connection box hole sealing airbag, characterized in that: The invention comprises a main airbag (1) and a plurality of auxiliary airbags (2), wherein the main airbag (1) is annular and is further provided with a notch (11), an upper end surface of the main airbag (1) is provided with an inflation nozzle (13), the plurality of auxiliary airbags (2) are connected to the main airbag (1), and the main airbag (1) is in communication with the auxiliary airbags (2).

2. The low-voltage connection box inner hole sealing airbag according to claim 1, characterized in that: The main airbag (1) and the auxiliary airbag (2) are an integrated structure.

3. The low-voltage connection box inner hole sealing airbag according to claim 1, characterized in that: The auxiliary airbag (2) is detachably mounted on the main airbag (1).

4. The low-voltage connection box inner hole sealing airbag according to claim 3, characterized in that: The upper end surface of the main airbag (1) is provided with a plurality of connecting air nozzles (12), and the auxiliary airbag (2) is provided with a docking air nozzle (21), and the auxiliary airbag (2) is docked with the connecting air nozzle (12) via the docking air nozzle (21).

5. The low-voltage connection box inner hole sealing airbag according to claim 3, characterized in that: The upper end surface of the main airbag (1) is provided with a plurality of connecting air nozzles (12), the auxiliary airbag (2) is provided with a docking air nozzle (21), and the docking air nozzle (21) of the auxiliary airbag (2) is connected to the connecting air nozzle (12) via a pressure hose (3).

6. The low-voltage connection box inner hole sealing airbag according to claim 5, characterized in that: The connecting air nozzle (12), the docking air nozzle (21) and the inflation nozzle (13) have the same structure. The pressure hose (3) comprises a tube body (31). Internal thread joints (32) are installed at both ends of the tube body (31). A ejector pin (33) is installed in the internal thread joint (32). The ejector pin (33) comprises a mounting section (331) and an extension section (332) located on one side of the mounting section (331). The mounting section (331) is fixedly connected to the internal thread joint (32). The extension section (332) extends outward. The mounting section (331) is provided with an air flow channel (333) located outside the extension section (332).

7. The low-voltage connection box inner hole sealing airbag according to any one of claims 1 to 6, characterized in that: The auxiliary airbag (2) is cylindrical or capsule-shaped.

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