Inflation sealing device capable of being replaced on track

Abstract

The utility model relates to the technical field of shafting sealing for ships, and discloses an inflatable sealing device capable of being replaced on the air, which comprises a spacer ring seat, a mounting seat body is arranged on one side of the spacer ring seat, a stud is arranged between the spacer ring seat and the mounting seat body, a nut is arranged at one end of the stud, and the other end of the stud is connected with the mounting seat body. A front inflatable sealing ring is arranged between the spacer ring seat and the mounting seat body, a front gasket is arranged in the front inflatable sealing ring, an O-shaped sealing ring is arranged between the spacer ring seat and the mounting seat body, a pressing ring is arranged on one side of the mounting seat body, and a screw is arranged on one side of the pressing ring. Compared with a traditional single-channel inflation sealing device, the inflation sealing device capable of being replaced on the track is provided with two sets of independent inflation sealing mechanisms, and compressed air is supplied through two independent channels; one set is normally operated and the other set is normally closed for standby, so that the probability that the two sets are severely abraded or damaged at the same time is low, and the overall safety coefficient is high.

Description

Technical Field

[0001] The utility model relates to the technical field of shafting seals for ships, in particular to an inflatable seal device that can be replaced during navigation. Background Technique

[0002] At present, during emergency maintenance of the stern shaft seal device of a ship, seawater outside the ship's side is blocked by inflating a single-channel inflatable seal device and then expanding and clamping the shafting. After the maintenance and replacement are completed, the compressed air in the inflatable seal device is released by operating in the reverse order to restore the stern shaft seal device to the normal operating state.

[0003] When the stern shaft seal device cannot be repaired during navigation, the inflatable seal device can be used for dynamic emergency sealing as disclosed in Patent CN203963027U to ensure the continuous navigation ability of the ship under low-speed conditions.

[0004] The above single-channel inflatable seal device has the advantages of simple operation and good sealing performance, but also has the following disadvantages:

[0005] 1. Affected by the comprehensive influence of harsh marine environments such as the stirring and scouring of sediment and seawater media, and the changes in seawater temperature, salinity and concentration, there is a risk of failure of the only inflatable sealing ring in the inflatable seal device due to the aging or damage of rubber parts. The maintenance of the existing inflatable seal device requires the ship to be dry-docked or lifted out of the water, which greatly affects the normal operation of the ship.

[0006] 2. Due to the wear resistance of the air tire itself and the navigation conditions, the dynamic emergency sealing function of the inflatable seal device cannot be effectively used for a long time. Unless absolutely necessary, it is not recommended to use it. Content of the Utility Model

[0007] Aiming at the deficiencies of the prior art, the utility model provides an inflatable seal device that can be replaced during navigation, which has the advantages of an inflatable seal device that can be replaced during navigation and can realize the functions of inspection and replacement during navigation, and solves the problems raised in the background technique.

[0008] The utility model provides the following technical scheme: an inflatable seal device that can be replaced during navigation, including a spacer ring seat, an installation seat body is arranged on one side of the spacer ring seat, a stud is arranged between the spacer ring seat and the installation seat body, a nut is arranged at one end of the stud, a front inflatable sealing ring is arranged between the spacer ring seat and the installation seat body, a front gasket is arranged inside the front inflatable sealing ring, an O-shaped sealing ring is arranged between the spacer ring seat and the installation seat body, a pressing ring is arranged on one side of the installation seat body, a screw is arranged on one side of the pressing ring, a rear inflatable sealing ring is arranged between the installation seat body and the pressing ring, and a rear gasket is arranged inside the rear inflatable sealing ring.

[0009] Preferably, the spacer ring seat is connected to the mounting seat body through studs and nuts, and an O-ring is installed in the middle for static sealing. The front inflatable seal ring is installed in the right groove on the mounting seat body and is firmly pressed by the spacer ring seat. A front gasket is arranged inside the seal ring for internal support; the rear inflatable seal ring is installed in the left groove on the mounting seat body and is firmly pressed by the pressure ring. A rear gasket is arranged inside the seal ring for internal support; the pressure ring is connected to the mounting seat body through a set of screws.

[0010] Preferably, both the front inflatable seal ring and the rear inflatable seal ring are connected with independent air source supplies and pipeline channels, without interfering with each other.

[0011] Preferably, both the front inflatable seal ring and the rear inflatable seal ring can be thermally bonded into a whole circle around the axis and cut off the axis.

[0012] Preferably, the rear inflatable seal ring is normally closed and disabled, and is only enabled under the condition that the front inflatable seal ring fails.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. For the inflatable sealing device that can be replaced during navigation, compared with the traditional single-channel inflatable sealing device, this new device has two sets of independent inflatable sealing mechanisms, which supply compressed air through two independent channels respectively; one set is in normal operation and the other set is normally closed as a standby. The probability of both suffering severe wear or damage at the same time is relatively small, and the overall safety factor is high.

[0015] 2. For the inflatable sealing device that can be replaced during navigation, the maintenance and replacement of the inflatable sealing device can be carried out during the voyage, reducing the number of times the ship enters the dry dock or is hauled out, saving time and costs.

[0016] 3. For the inflatable sealing device that can be replaced during navigation, by replacing the commonly used inflatable seal ring, the dynamic emergency sealing service life of this inflatable sealing device is increased, the navigation activity range of the ship is expanded, and the risks of ship anchoring and a large amount of water flooding into the cabin are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an inflatable sealing device that can be replaced during navigation provided by the utility model;

[0018] Figure 2 It is a schematic diagram of the overall structure of an inflatable sealing device that can be replaced during navigation provided by the utility model.

[0019] In the figure: 1. Spacer ring seat; 2. Stud; 3. Nut; 4. Front gasket; 5. Front inflatable seal ring; 6. Mounting seat body; 7. O-ring; 8. Rear gasket; 9. Rear inflatable seal ring; 10. Pressure ring; 11. Screw. DETAILED DESCRIPTION OF THE INVENTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1 to 2 , an inflatable sealing device that can be replaced in mid-flight, comprising a spacer ring seat 1, a mounting seat body 6 is arranged on one side of the spacer ring seat 1, a stud 2 is arranged between the spacer ring seat 1 and the mounting seat body 6, a nut 3 is arranged at one end of the stud 2, a front inflatable sealing ring 5 is arranged between the spacer ring seat 1 and the mounting seat body 6, a front gasket 4 is arranged inside the front inflatable sealing ring 5, an O-ring 7 is arranged between the spacer ring seat 1 and the mounting seat body 6, a pressure ring 10 is arranged on one side of the mounting seat body 6, a screw 11 is arranged on one side of the pressure ring 10, a rear inflatable sealing ring 9 is arranged between the mounting seat body 6 and the pressure ring 10, and a rear gasket 8 is arranged inside the rear inflatable sealing ring 9;

[0022] The inflatable sealing device that can be replaced on the fly can realize the function of on-the-go inspection and replacement, which solves the problem that the maintenance of the existing inflatable sealing device requires the ship to enter the dock or go up the dock, which greatly affects the normal operation of the ship.

[0023] See also Figures 1 to 2 , the spacer ring seat 1 is connected to the mounting seat body 6 through the stud 2 and the nut 3, and an O-ring 7 is installed in the middle for static sealing. The front inflatable sealing ring 5 is installed in the right groove on the mounting seat body 6 and is firmly pressed by the spacer ring seat 1. A front liner 4 is provided in the sealing ring for internal support; the rear inflatable sealing ring 9 is installed in the left groove on the mounting seat body 6 and is firmly pressed by the pressure ring 10. A rear liner 8 is provided in the sealing ring for internal support; the pressure ring 10 is connected to the mounting seat body 6 through a set of screws 11;

[0024] When the ship is shut down and the shaft is locked, compressed air of a certain pressure is supplied to the rear inflatable sealing ring 9 to seal off the seawater outside the ship, the nut 3 is loosened and removed, and the spacer ring seat 1 together with the main body of the stern shaft sealing device is moved axially to make it out of contact with the mounting seat body 6; then the separated main body is gently suspended on the stern shaft, the front inflatable sealing ring 5 is pulled out from the mounting seat body 6, the front gasket 4 is peeled off from the front inflatable sealing ring 5, the sealing ring is cut off and pulled out of the stern shaft, and then a new front inflatable sealing ring 5 is bonded to complete the on-board replacement of the inflatable sealing device.

[0025] See also Figures 1 to 2, both the front inflatable sealing ring 5 and the rear inflatable sealing ring 9 have independent air source supplies and pipeline channel connections, without interfering with each other. Both the front inflatable sealing ring 5 and the rear inflatable sealing ring 9 can be thermally bonded into a complete circle around the shaft and cut off-axis. The rear inflatable sealing ring 9 is normally closed and disabled, and is only enabled under the condition that the front inflatable sealing ring 5 fails;

[0026] By providing the front inflatable sealing ring 5 and the rear inflatable sealing ring 9, the device has two sets of independent inflatable sealing mechanisms, which supply compressed air through two independent channels respectively; one set is for normal operation, and the other set is for standby and normally closed. The probability of both suffering serious wear or damage at the same time is relatively small, and the overall safety factor is high.

[0027] In the present utility model, the in-flight replacement operation process of the inflatable sealing device is as follows:

[0028] 1. After the ship stops and locks the shaft, supply compressed air with a certain pressure to the rear inflatable sealing ring 9 to seal off the seawater outside the hull.

[0029] 2. Loosen and remove the nut 3, and move the spacer ring seat 1 together with the main body of the stern shaft sealing device axially so that it is separated from the mounting seat body 6; then gently hang the separated main body on the stern shaft.

[0030] 3. Withdraw the front inflatable sealing ring 5 from the mounting seat body 6, peel off the front gasket 4 from the front inflatable sealing ring 5, and cut off the sealing ring and withdraw it from the stern shaft.

[0031] 4. First, use a special tooling to thermally bond a new front inflatable sealing ring 5 around the shaft, then install the front gasket 4 into the front inflatable sealing ring 5, and then apply grease on the outside of the sealing ring and push it into the right slot on the mounting seat body 6.

[0032] 5. After aligning the mounting hole positions with the stud 2, slowly move the spacer ring seat 1 to fit the end face of the mounting seat body 6; then tighten the nut 3 and fasten it according to the specified torque value.

[0033] 6. Release the rear inflatable sealing ring 9, enable the front inflatable sealing ring 5, and conduct a sealing performance test.

[0034] 7. After passing the inspection, release the front inflatable sealing ring 5 again to complete the in-flight replacement of the inflatable sealing device.

[0035] Through the above operation process, the repair and replacement of the inflatable sealing device can be carried out during the voyage, reducing the number of times the ship enters the dry dock or is hauled out, saving time and cost, solving the problem that the repair of the existing inflatable sealing device requires the ship to enter the dry dock or be hauled out, which greatly affects the normal operation of the ship. And compared with the traditional single-channel inflatable sealing device, this new device has two sets of independent inflatable sealing mechanisms, which supply compressed air through two independent channels respectively; one set is for normal operation, and the other set is for standby and normally closed. The probability of both suffering serious wear or damage at the same time is relatively small, and the overall safety factor is high.

[0036] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inflatable sealing device that can be replaced in flight, including a spacer ring seat (1), characterized in that, One side of the spacer ring seat (1) is provided with a mounting seat body (6). A stud (2) is arranged between the spacer ring seat (1) and the mounting seat body (6). One end of the stud (2) is provided with a nut (3). A front inflatable sealing ring (5) is arranged between the spacer ring seat (1) and the mounting seat body (6). A front gasket (4) is arranged inside the front inflatable sealing ring (5). An O-ring (7) is arranged between the spacer ring seat (1) and the mounting seat body (6). One side of the mounting seat body (6) is provided with a retaining ring (10). One side of the retaining ring (10) is provided with a screw (11). A rear inflatable sealing ring (9) is arranged between the mounting seat body (6) and the retaining ring (10). A rear gasket (8) is arranged inside the rear inflatable sealing ring (9).

2. The inflatable sealing device capable of being replaced in flight according to claim 1, wherein: The spacer ring seat (1) is connected to the mounting seat body (6) through the stud (2) and the nut (3), and an O-ring (7) is installed in the middle for static sealing. The front inflatable sealing ring (5) is installed in the right groove on the mounting seat body (6) and is firmly pressed by the spacer ring seat (1). A front gasket (4) is arranged inside the sealing ring for internal support. The rear inflatable sealing ring (9) is installed in the left groove on the mounting seat body (6) and is firmly pressed by the retaining ring (10). A rear gasket (8) is arranged inside the sealing ring for internal support. The retaining ring (10) is connected to the mounting seat body (6) through a set of screws (11).

3. The inflatable sealing device capable of in-flight replacement according to claim 1, wherein: Both the front inflatable sealing ring (5) and the rear inflatable sealing ring (9) are connected with independent air source supplies and pipeline channels, without interfering with each other.

4. The inflatable sealing device capable of being replaced during flight according to claim 1, wherein: Both the front inflatable sealing ring (5) and the rear inflatable sealing ring (9) can be thermally bonded into a whole circle around the axis and cut off the axis.

5. The inflatable sealing device capable of in-flight replacement according to claim 1, characterized in that: The rear inflatable sealing ring (9) is normally closed and disabled, and is only enabled under the condition that the front inflatable sealing ring (5) fails.

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