External hydraulic test sealing device

Abstract

The present invention relates to the field of external hydraulic test technology, and discloses an external hydraulic test sealing device, including a nut, a gasket, a lifting handle, a lower sealing plate, a first sealing ring, an outer shell, a pull rod, a second sealing ring and an upper sealing plate, wherein the outer shell is arranged at the gap between the lower sealing plate and the upper sealing plate, the lower sealing plate is provided with a slot relative to one side of the outer shell, the outer shell is plugged into the inner wall of the lower sealing plate located at the slot, the upper sealing plate is plugged into the inner wall of the outer shell at one end away from the lower sealing plate, and the first sealing ring is fixedly sleeved on the side wall of the outer shell located inside the lower sealing plate. The first sealing ring and the second sealing ring provided by the present invention can make the outer shell sealably installed at the gap between the upper sealing plate and the lower sealing plate, and the two ends are sealed and connected by a pull rod, which reduces the production cost of the sealing device, shortens the processing cycle, and is convenient to install, and is not easy to damage the outer surface of the outer shell.

Description

Technical Field

[0001] The invention relates to the technical field of external hydraulic pressure testing, and in particular to an external hydraulic pressure testing sealing device. Background Art

[0002] The use environment of a certain product is hundreds of meters underwater, and its shell needs to withstand a certain amount of water pressure. Therefore, after the shell is machined, an external hydraulic test must be carried out in a sealed state to check the deformation and leakage of the shell in pressurized water to test the strength and stability of the shell.

[0003] The commonly designed external hydraulic sealing devices are to seal the two ends of the shell with sealing plates respectively, and use wedge rings to independently connect the sealing plates to the shell. Due to the particularity of the connecting wedge ring, the elasticity and strength of the material are required to be high, so the processing cost is high and the processing cycle is long, which cannot meet the needs of scientific research and production; and when the wedge ring is connected, because its end is a wedge-shaped sharp corner, it is easy to damage the inlet and outlet of the shell during installation and disassembly, causing quality defects on the outer surface of the shell. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art and to propose an external hydraulic test sealing device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: An external hydraulic test sealing device comprises a nut, a gasket, a lifting handle, a lower sealing plate, a first sealing ring, an outer shell, a pull rod, a second sealing ring and an upper sealing plate, wherein the outer shell is arranged in the gap between the lower sealing plate and the upper sealing plate, the lower sealing plate is provided with a slot relative to a side surface of the outer shell, the outer shell is plugged into the inner wall of the lower sealing plate located in the slot, the upper sealing plate is plugged into the inner wall of the outer shell at one end away from the lower sealing plate, a first sealing ring is fixedly sleeved on the side wall of the outer shell located inside the lower sealing plate, the side wall of the first sealing ring is pressed against the inner wall of the lower sealing plate located in the slot, a second sealing ring is fixedly sleeved on the side wall of the upper sealing plate located inside the outer shell, and the second sealing ring is pressed against the inner wall of the outer shell.

[0006] Preferably, a through hole is formed on the inner wall of the lower sealing plate, a threaded hole is formed on the inner wall of the upper sealing plate on one side relative to the lower sealing plate, and the rod wall of the pull rod passes through the lower sealing plate and extends to the upper sealing plate and is located inside the threaded hole.

[0007] Preferably, a first thread is provided on the rod wall of the pull rod located inside the threaded hole and is threadedly connected to the inner wall of the upper sealing plate located in the threaded hole.

[0008] Preferably, the rod wall of the pull rod extends to the side of the lower sealing plate away from the upper sealing plate, the rod wall of the pull rod located outside the lower sealing plate is provided with a second thread, and the nut is threadedly connected to the rod wall of the pull rod located on the second thread.

[0009] Preferably, a washer is sleeved on the rod wall of the pull rod located at the gap between the nut and the lower sealing plate, the side wall of the nut is pressed against the side wall of the washer, and the side wall of the washer is fitted against the side wall of the lower sealing plate.

[0010] Preferably, a threaded mounting hole is provided on the side wall of the lower sealing plate, and the handle is threadedly connected to the inner wall of the threaded mounting hole of the lower sealing plate.

[0011] Compared with the prior art, the present invention provides an external hydraulic test sealing device, which has the following beneficial effects: 1. The external hydraulic test sealing device can make the housing seal installed in the gap between the upper sealing plate and the lower sealing plate through the first sealing ring and the second sealing ring. After the two ends are sealed, a pull rod type connection is adopted, which reduces the production cost of the sealing device, shortens the processing cycle, and the installation process is convenient and is not easy to damage the outer surface of the housing.

[0012] 2. The external hydraulic test sealing device has threads at both ends of the pull rod. The thread of the end away from the lower sealing plate cooperates with the upper sealing plate, and the end opposite to the lower sealing plate passes through the lower sealing plate and cooperates with the nut, so the tightness of the connection can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural schematic diagram of an external hydraulic test sealing device proposed by the present invention; Figure 2 for Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0014] In the figure: 1 nut, 2 washer, 3 handle, 4 lower sealing plate, 5 first sealing ring, 6 housing, 7 pull rod, 8 second sealing ring, 9 upper sealing plate. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0016] Reference Figure 1-2, an external hydraulic test sealing device, comprising a nut 1, a gasket 2, a lifting handle 3, a lower sealing plate 4, a first sealing ring 5, a shell 6, a pull rod 7, a second sealing ring 8 and an upper sealing plate 9, the shell 6 is arranged at the gap between the lower sealing plate 4 and the upper sealing plate 9, the lower sealing plate 4 is provided with a slot relative to one side of the shell 6, the shell 6 is plugged into the inner wall of the lower sealing plate 4 located in the slot, the upper sealing plate 9 is plugged into the inner wall of the shell 6 at one end away from the lower sealing plate 4, the shell 6 is located on the side wall inside the lower sealing plate 4 and is fixedly sleeved with a first sealing ring 5, the side wall of the first sealing ring 5 is pressed and arranged on the inner wall of the lower sealing plate 4 located in the slot, the upper sealing plate 9 is located on the side wall inside the shell 6 and is fixedly sleeved with a second sealing ring 8, the second sealing ring 8 is pressed and arranged on the inner wall of the shell 6, a threaded mounting hole is opened on the side wall of the lower sealing plate 4, and the handle 3 is threadedly connected to the inner wall of the threaded mounting hole of the lower sealing plate 4 A washer 2 is sleeved on the rod wall of the pull rod 7 located at the gap between the nut 1 and the lower sealing plate 4 , the side wall of the nut 1 is pressed against the side wall of the washer 2 , and the side wall of the washer 2 is fitted against the side wall of the lower sealing plate 4 .

[0017] A through hole is provided on the inner wall of the lower sealing plate 4, and a threaded hole is provided on the inner wall of the upper sealing plate 9 on one side relative to the lower sealing plate 4. The rod wall of the pull rod 7 passes through the lower sealing plate 4 and extends to the upper sealing plate 9 located inside the threaded hole. A first thread is provided on the rod wall of the pull rod 7 located inside the threaded hole and is threadedly connected to the inner wall of the threaded hole of the upper sealing plate 9. The rod wall of the pull rod 7 extends to the side of the lower sealing plate 4 away from the upper sealing plate 9. A second thread is provided on the rod wall of the pull rod 7 located outside the lower sealing plate 4, and the nut 1 is threadedly connected to the rod wall of the pull rod 7 located on the second thread.

[0018] When in use, the lower sealing plate 4 and the upper sealing plate 9 are fixedly plugged at the two ends of the housing 6, so that the first sealing ring 5 and the second sealing ring 8 are tightly fitted in the gap, which can ensure the use effect of the experimental sealing device.

[0019] The handle 3 is a lifting device, which is connected by thread. The inner wall of the lower sealing plate 4 located at the through hole is designed as a stepped inner hole, part of the inner hole cooperates with the outer circle of the shell, compresses the first sealing ring 5, plays a radial sealing role, and the remaining inner holes are used as empty spaces; two threaded mounting holes are designed on the side of the lower sealing plate 4 for installing the lifting handle 3; six through holes are designed on the end face of the lower sealing plate 4 for passing through the pull rod 7, which is fastened to the lower sealing plate 4 with nuts 1 and washers 2.

[0020] Both ends of the tie rod 7 are threaded. The thread of the end facing away from the lower sealing plate 4 is matched with the upper sealing plate 9, and the end opposite to the lower sealing plate 4 passes through the lower sealing plate 4 and matches with the nut 1; two straight platforms are designed on the circumference for use when a wrench is screwed in or removed from the tie rod 7. A stepped outer circle is provided at the connection between the upper sealing plate 9 and the second sealing ring 8. Part of the outer circle matches with the inner hole of the outer shell 6 to press the second sealing ring 8 and play a radial sealing role. The rest of the outer circle is used as an empty space; six threaded holes are designed on the end face of the upper sealing plate 9. The positions of the threaded holes are the same as those of the holes in the lower sealing plate 4, which are used to install the tie rod 7.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An external hydraulic test sealing device, comprising a nut (1), a washer (2), a lifting handle (3), a lower sealing plate (4), a first sealing ring (5), a housing (6), a pull rod (7), a second sealing ring (8) and an upper sealing plate (9), characterized in that: The outer shell (6) is arranged at a gap between the lower sealing plate (4) and the upper sealing plate (9); the lower sealing plate (4) is provided with a slot on one side of the outer shell (6); the outer shell (6) is plugged into the inner wall of the lower sealing plate (4) located in the slot; the upper sealing plate (9) is plugged into the inner wall of the outer shell (6) at one end away from the lower sealing plate (4); a first sealing ring (5) is fixedly sleeved on the side wall of the outer shell (6) located inside the lower sealing plate (4); the side wall of the first sealing ring (5) is pressed against the inner wall of the lower sealing plate (4) located in the slot; a second sealing ring (8) is fixedly sleeved on the side wall of the upper sealing plate (9) located inside the outer shell (6); the second sealing ring (8) is pressed against the inner wall of the outer shell (6).

2. An external hydraulic test sealing device according to claim 1, characterized in that: The inner wall of the lower sealing plate (4) is provided with a through hole, the inner wall of the upper sealing plate (9) on one side relative to the lower sealing plate (4) is provided with a threaded hole, and the rod wall of the pull rod (7) passes through the lower sealing plate (4) and extends to the upper sealing plate (9) and is located inside the threaded hole.

3. The external hydraulic test sealing device according to claim 1, characterized in that: The pull rod (7) is provided with a first thread on a rod wall located inside the threaded hole and is threadedly connected to an inner wall of the upper sealing plate (9) located in the threaded hole.

4. The external hydraulic test sealing device according to claim 1, characterized in that: The rod wall of the pull rod (7) extends to the side of the lower sealing plate (4) away from the upper sealing plate (9), and a second thread is formed on the rod wall of the pull rod (7) located outside the lower sealing plate (4), and the nut (1) is threadedly connected to the rod wall of the pull rod (7) located on the second thread.

5. The external hydraulic test sealing device according to claim 1, characterized in that: A washer (2) is sleeved on the rod wall of the pull rod (7) located at the gap between the nut (1) and the lower sealing plate (4); the side wall of the nut (1) is pressed against the side wall of the washer (2); and the side wall of the washer (2) is fitted against the side wall of the lower sealing plate (4).

6. The external hydraulic test sealing device according to claim 1, characterized in that: A threaded mounting hole is provided on the side wall of the lower sealing plate (4), and the handle (3) is threadedly connected to the inner wall of the threaded mounting hole of the lower sealing plate (4).

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