Sealing device for external hydraulic test

Abstract

The utility model relates to the technical field of external hydraulic tests, and discloses an external hydraulic test sealing device which comprises a nut, a gasket, a hoisting handle, a lower sealing plate, a first sealing ring, a shell, a pull rod, a second sealing ring and an upper sealing plate, the shell is arranged at a gap between the lower sealing plate and the upper sealing plate, and a slot is formed in the side face, opposite to the shell, of the lower sealing plate. The shell is arranged on the inner wall, located in the inserting groove, of the lower sealing plate in an inserted mode, the upper sealing plate is arranged on the inner wall of the end, away from the lower sealing plate, of the shell in an inserted mode, and the side wall, located in the lower sealing plate, of the shell is fixedly sleeved with a first sealing ring. The first sealing ring and the second sealing ring provided by the utility model can enable the shell to be hermetically mounted at the gap between the upper sealing plate and the lower sealing plate, and the two ends are sealed and then are connected in a pull rod manner, so that the production cost of the sealing device is reduced, the processing period is shortened, the mounting process is convenient, and the outer surface of the shell is not easy to damage.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of external liquid pressure test, and particularly relates to a sealing device for external liquid pressure test. BACKGROUND

[0002] The use environment of certain products is underwater for several hundred meters, and the shell needs to bear certain water pressure. Therefore, after the shell is mechanically processed, external liquid pressure test must be carried out in a sealed state to check the deformation and leakage of the shell in the pressure water, so as to test the strength and stability of the shell.

[0003] The sealing device for external liquid pressure test is usually designed to seal the two ends of the shell with sealing plates respectively, and to independently connect the sealing plates and the shell with wedge rings. Due to the particularity of the connecting wedge ring, the elasticity and strength of the material are required to be higher, so the processing cost is higher, the processing period is longer, and the needs of scientific research and production cannot be met. Moreover, when the wedge ring is connected, the end part is a wedge-shaped sharp corner, which is easy to damage the entrance of the shell during installation and disassembly, causing quality defects on the outer surface of the shell. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving the problems in the prior art and provides a sealing device for external liquid pressure test.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A sealing device for external liquid pressure test comprises a nut, a gasket, a lifting handle, a lower sealing plate, a first sealing ring, a shell, a pull rod, a second sealing ring and an upper sealing plate. The 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 on one side surface relative to the shell. The shell is inserted into the inner wall of the slot in the lower sealing plate. The upper sealing plate is inserted into the inner wall of one end of the shell away from the lower sealing plate. The first sealing ring is fixedly sleeved on the side wall of the shell inside the lower sealing plate. The side wall of the first sealing ring is tightly arranged on the inner wall of the slot in the lower sealing plate. The second sealing ring is fixedly sleeved on the side wall of the shell inside the upper sealing plate. The second sealing ring is tightly arranged on the inner wall of the shell.

[0007] Preferably, the inner wall of the lower sealing plate is provided with a through hole, and the inner wall of one side of the upper sealing plate relative to the lower sealing plate is provided with a threaded hole. The rod wall of the pull rod extends through the lower sealing plate to the inside of the threaded hole in the upper sealing plate.

[0008] Preferably, the rod wall of the pull rod inside the threaded hole is provided with a first thread and is screw-connected to the inner wall of the threaded hole in the upper sealing plate.

[0009] Preferably, the rod wall of the pull rod extends to the side of the lower sealing plate away from the upper sealing plate, the second thread is formed on the rod wall of the pull rod outside the lower sealing plate, and the nut is threadedly connected to the rod wall of the pull rod at the second thread.

[0010] Preferably, the gasket is arranged on the rod wall of the pull rod at the gap between the nut and the lower sealing plate, the side wall of the nut is tightly arranged on the side wall of the gasket, and the side wall of the gasket is tightly arranged on the side wall of the lower sealing plate.

[0011] Preferably, the threaded mounting hole is formed in the side wall of the lower sealing plate, and the handle is threadedly connected to the inner wall of the lower sealing plate at the threaded mounting hole.

[0012] Compared with the prior art, the utility provides an outer liquid pressure test sealing device, which has the following beneficial effects:

[0013] 1. The outer liquid pressure test sealing device, the first sealing ring and the second sealing ring can be arranged at the gap between the upper sealing plate and the lower sealing plate, and the two ends are sealed and connected by the pull rod, thereby reducing the production cost of the sealing device, shortening the processing period, and facilitating the installation process and preventing the outer surface of the shell from being damaged.

[0014] 2. The outer liquid pressure test sealing device, the pull rod is provided with threads at both ends, the threads at the end away from the lower sealing plate are matched with the upper sealing plate, and the threads at the end relative to the lower sealing plate are matched with the nut after penetrating through the lower sealing plate, thereby ensuring the tightness of the connection. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The utility provides a structure schematic view of an outer liquid pressure test sealing device;

[0016] Figure 2 The utility provides a structure schematic view of an outer liquid pressure test sealing device; Figure 1 The utility provides a structure schematic view of an outer liquid pressure test sealing device;

[0017] In the figure: 1 nut, 2 gasket, 3 handle, 4 lower sealing plate, 5 first sealing ring, 6 shell, 7 pull rod, 8 second sealing ring, 9 upper sealing plate. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility will be clearly and completely described below with reference to the drawings in the embodiments of the utility. Obviously, the described embodiments are only part of the embodiments of the utility, rather than all the embodiments.

[0019] Reference Figures 1-2The utility model provides a kind of outer liquid pressure test sealing device, including nut 1, washer 2, lifting handle 3, lower sealing plate 4, first sealing ring 5, shell 6, pull rod 7, second sealing ring 8 and upper sealing plate 9, shell 6 is arranged at the gap of lower sealing plate 4 and upper sealing plate 9, the side surface of lower sealing plate 4 is provided with slot relative to shell 6, shell 6 is inserted and is arranged in the inner wall of lower sealing plate 4 located in slot, upper sealing plate 9 is inserted and is arranged in the inner wall of one end of shell 6 away from lower sealing plate 4, first sealing ring 5 is fixedly sleeved on the side wall of shell 6 inside lower sealing plate 4, the side wall of first sealing ring 5 is tightly arranged in the inner wall of lower sealing plate 4 located in slot, second sealing ring 8 is fixedly sleeved on the side wall of shell 6 inside upper sealing plate 9, and second sealing ring 8 is tightly arranged in the inner wall of shell 6, and the side wall of lower sealing plate 4 is provided with threaded mounting hole, and handle 3 is threadedly connected in the inner wall of threaded mounting hole of lower sealing plate 4

[0020] Pull rod 7 is sleeved with washer 2 on the rod wall at the gap between nut 1 and lower sealing plate 4, and the side wall of nut 1 is tightly arranged on the side wall of washer 2, and the side wall of washer 2 is arranged on the side wall of lower sealing plate 4.

[0021] The inner wall of lower sealing plate 4 is provided with through hole, and the inner wall of one side of upper sealing plate 9 is provided with threaded hole relative to lower sealing plate 4, and the rod wall of pull rod 7 extends to the inside of threaded hole of upper sealing plate 9 through lower sealing plate 4, and the rod wall of pull rod 7 is provided with first thread in threaded hole and is threadedly connected in the inner wall of threaded hole of upper sealing plate 9, and the rod wall of pull rod 7 extends to the side of lower sealing plate 4 away from upper sealing plate 9, and the rod wall of pull rod 7 is provided with second thread outside lower sealing plate 4, and nut 1 is threadedly connected on the rod wall of pull rod 7 in second thread.

[0022] When using, lower sealing plate 4 and upper sealing plate 9 are fixedly inserted and arranged at both ends of shell 6 respectively, so that first sealing ring 5 and second sealing ring 8 are tightly arranged at the gap, which can ensure the use effect of the experimental sealing device.

[0023] Handle 3 is a lifting device, and is connected by thread; the inner wall of through hole of lower sealing plate 4 is designed as stepped hole, part of the hole is matched with the outer circle of shell to tightly press first sealing ring 5, and the hole plays a radial sealing role, and the rest of the hole is used as empty space; the side surface of lower sealing plate 4 is designed with two threaded mounting holes for installing lifting handle 3; the end surface of lower sealing plate 4 is designed with six through holes for pulling rod 7, and nut 1 and washer 2 are tightly connected with lower sealing plate 4.

[0024] The pull rod 7 has threads at both ends, the threads at one end away from the lower sealing plate 4 are matched with the upper sealing plate 9, and the threads at one end relative to the lower sealing plate 4 pass through the lower sealing plate 4 and are matched with the nut 1; two straight platforms are designed on the circumference and are used when a wrench is screwed into or disassembled from the pull rod 7. The connection between the upper sealing plate 9 and the second sealing ring 8 is provided with a stepped outer circle, part of the outer circle is matched with the inner hole of the outer shell 6 to compress the second sealing ring 8 and play a radial sealing role, and the rest of the outer circle is used as a space; the end face of the upper sealing plate 9 is designed with six threaded holes, the positions of the threaded holes are the same as the positions of the holes of the lower sealing plate 4, and are used for installing the pull rod 7.

[0025] The above merely describes the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An external hydraulic pressure 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), characterized in that: 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 on the side wall opposite to the shell (6), the shell (6) is inserted into the inner wall of the slot of the lower sealing plate (4), the upper sealing plate (9) is inserted into the inner wall of the end of the shell (6) away from the lower sealing plate (4), the first sealing ring (5) is fixedly sleeved on the side wall of the shell (6) inside the lower sealing plate (4), the side wall of the first sealing ring (5) is tightly arranged on the inner wall of the slot of the lower sealing plate (4), the second sealing ring (8) is fixedly sleeved on the side wall of the shell (6) inside the upper sealing plate (9), and the second sealing ring (8) is tightly arranged on the inner wall of the shell (6).

2. An external hydraulic pressure 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, and the inner wall of one side of the upper sealing plate (9) is provided with a threaded hole relative to the lower sealing plate (4), the rod wall of the pull rod (7) extends through the lower sealing plate (4) to the inside of the threaded hole of the upper sealing plate (9).

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

4. An external hydraulic pressure test sealing device according to claim 1, characterized by: 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), the rod wall of the pull rod (7) outside the lower sealing plate (4) is provided with a second thread, and the nut (1) is threadedly connected to the rod wall of the pull rod (7) provided with the second thread.

5. An external hydraulic pressure test sealing device according to claim 1, characterized by: The rod wall of the pull rod (7) at the gap between the nut (1) and the lower sealing plate (4) is sleeved with a gasket (2), the side wall of the nut (1) is tightly arranged on the side wall of the gasket (2), and the side wall of the gasket (2) is tightly arranged on the side wall of the lower sealing plate (4).

6. An external hydraulic pressure test sealing device according to claim 1, characterized by: The side wall of the lower sealing plate (4) is provided with a threaded mounting hole, 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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