Bonding tool for inflatable sealing ring of stern shaft sealing device

Abstract

The utility model relates to a bonding tool for an inflatable sealing ring of a stern shaft sealing device, which is characterized in that a liner is arranged in an inner cavity of the inflatable sealing ring before the inflatable sealing ring is bonded, the inflatable sealing ring is fixedly supported, the section to be bonded of the inflatable sealing ring is attached to the inner contour of a clamping plate, and the lower part of the liner is fixedly connected to a bottom plate; clamping plates are fixedly connected to the front end and the rear end of the bottom plate respectively, a heating plate is placed between the two clamping plates, and the heating plate is pressed into the inflatable sealing ring along the outline of the inflatable sealing ring and fixedly connected with the bottom plate, so that the inflatable sealing ring presses and attaches the two bonding end faces of the inflatable sealing ring tightly under the guiding action of the heating plate, the two clamping plates and the bottom plate; therefore, the bonding cross section of the inflatable sealing ring can be ensured to be tightly attached; the heating rod and the thermistor are plugged into the bonding tool through a heating hole in the heating plate and are used for heating and completing heat vulcanization of the inflatable sealing ring; and the output end of the temperature controller is connected with the heating rod through the relay.

Description

Technical Field

[0001] The utility model relates to an inflatable sealing ring of a stern shaft sealing device, in particular to a bonding tool for the inflatable sealing ring of the stern shaft sealing device. Background Art

[0002] The cross section of the inflatable seal ring of the stern shaft seal device is concave with convex shape, and the whole is symmetrical ring. Its three-dimensional model diagram (see Figure 1 ), before the inflatable seal ring is filled with pressurized air (see Figure 2 (a)), a certain gap is kept between the bottom of the sealing ring and the stern shaft, and the seawater outside the ship is connected to the inside of the sealing device through the gap channel. After the pressurized air is filled (see Figure 2 (b)), the protrusion at the bottom of the sealing ring will bulge out and hug the stern shaft, and the toothed seal on the sealing ring will fit tightly against the shaft to seal it. At this time, the seawater outside the ship is isolated from the inside of the sealing device.

[0003] Existing methods for replacing the inflatable seal ring in a ship's stern shaft seal are generally divided into integral replacement and split replacement. Replacing an integral inflatable seal ring often requires removing the entire mounting base and extracting the shaft. This replacement method is labor-intensive, costly, and time-consuming. Furthermore, during dry dock repairs, the main shaft is typically not moved due to factors such as alignment and docking time. This makes integral inflatable seal rings less commonly used during maintenance. Split-type inflatable sealing rings are usually bonded with adhesives, which can be divided into three categories: thermoplastic, or rubber. The most widely used ones include chloroprene adhesives, polysulfide adhesives, cyanoacrylate (i.e. 501), etc. However, due to the complex cross-sectional shape and operating conditions of the inflatable sealing ring, the current bonding process of the split-type inflatable sealing ring still has certain limitations, such as low bonding strength, complex operation, easy dislocation, easy cracking or falling off, etc. In addition, the existing adhesive bonding method has high requirements for the ambient temperature. It is very easy to fail when bonding in winter or when the ambient temperature is low. Summary of the Invention

[0004] This utility model provides a bonding tool for the inflatable seal ring of a stern shaft seal device. After summarizing numerous problems with existing bonding processes for the inflatable seal ring of a stern shaft seal device and optimizing them, a set of tools and methods for fixing and heating the inflatable seal ring has been designed. The tool mainly comprises two parts: a mechanical bonding tool and a temperature control system. The mechanical tool fixes the surface of the inflatable seal ring to be bonded and provides a pressing force. The temperature control system controls the temperature during the hot vulcanization bonding process, ensuring that the rubber is vulcanized at a reasonable temperature, and finally completing the hot vulcanization bonding of the inflatable seal ring. This greatly improves the efficiency and reliability of bonding and enhances the overall maintainability of the stern shaft seal device.

[0005] In order to achieve the above purpose, the technical solution of the utility model is: a bonding tool for the inflatable sealing ring of the stern shaft sealing device, including a gasket, a base plate, a heating plate, a clamping plate, a thermistor, a temperature controller, a relay, and a heating rod. The gasket is installed in the inner cavity of the inflatable sealing ring before bonding the inflatable sealing ring to fix and support the inflatable sealing ring and make the cross section of the inflatable sealing ring to be bonded fit with the inner contour of the clamping plate, and the bottom of the gasket is fixedly connected to the base plate, and the front and rear ends of the base plate are respectively fixedly connected to the clamping plates, and a plate is placed between the two clamping plates. A heating plate is placed, and the heating plate is pressed into the inflatable sealing ring along the contour of the inflatable sealing ring and is fixedly connected to the base plate, so that the inflatable sealing ring presses the two bonding end faces of the inflatable sealing ring together under the guidance of the heating plate, the two clamping plates and the base plate, thereby ensuring that the bonding cross-section of the inflatable sealing ring can fit tightly; the heating rod and the thermistor are inserted into the bonding tool through the heating hole on the heating plate to heat and complete the thermal vulcanization of the inflatable sealing ring; the input end of the temperature controller is connected to the thermistor, and the output end is connected to the heating rod through a relay.

[0006] Furthermore, the inner contours of the two clamping plates are adapted to the cross-sectional shape of the inflatable sealing ring, and the two ends of the inflatable sealing ring are clamped and fixed to the base plate by bolts before bonding.

[0007] Furthermore, the inner contour of the heating plate is adapted to the cross-sectional shape of the inflatable sealing ring, the inflatable sealing ring is pressed in along the contour of the inflatable sealing ring, and is fixedly connected to the base plate by bolts, which plays a heat conduction role during the bonding process.

[0008] The beneficial effects of the utility model are:

[0009] The bonding tool and bonding method of the inflatable sealing ring of the stern shaft sealing device of the utility model can complete the bonding of the irregular cross-sectional shape of the inflatable sealing ring through clamping and fixing with special tooling; at the same time, the inflatable sealing ring is bonded by a hot vulcanization process, and since a chemical bond connection is formed, the bonding strength and reliability can be guaranteed, which solves the problems of low bonding strength, complex operation, easy dislocation, easy cracking or falling off of the traditional adhesive bonding method, greatly improves the reliability, safety and maintainability of the bonding of the inflatable sealing ring of the stern shaft tube sealing device, and greatly reduces the maintenance cost of the stern shaft tube sealing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the structural diagram of the inflatable sealing ring;

[0011] Figure 2 This is the working principle diagram of the inflatable sealing ring;

[0012] Figure 3 It is a three-dimensional diagram of the bonding tooling structure;

[0013] Figure 4 It is the three-view drawing of the bonding tooling structure;

[0014] Among them: (a) is the main view, (b) is the left view, and (c) is the top view;

[0015] Figure 5 It is a three-dimensional diagram of the base plate structure;

[0016] Figure 6 It is a schematic diagram of the bottom plate structure plane;

[0017] Among them: (a) is the main view, (b) is the top view;

[0018] Figure 7 It is a three-dimensional diagram of the liner structure;

[0019] Figure 8 It is a plan view of the liner structure;

[0020] Among them: (a) is the main view, (b) is the left view;

[0021] Figure 9 It is a three-dimensional diagram of the heating plate structure;

[0022] Figure 10 It is the three-view drawing of the heating plate structure;

[0023] Among them: (a) is the main view, (b) is the left view, and (c) is the top view;

[0024] Figure 11 It is a three-dimensional diagram of the clamping plate structure;

[0025] Figure 12 It is a plan view of the clamping plate structure;

[0026] Among them: (a) is the main view, (b) is the top view;

[0027] Figure 13 It is a diagram of the temperature control system composition;

[0028] Figure 14 It is the bonding tool installation drawing;

[0029] Figure 15 It is a graph of vulcanization temperature and time. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] like Figures 3 to 15 As shown, an embodiment of the utility model proposes a stern shaft sealing device inflatable sealing ring bonding tool, including a gasket 1, a base plate 2, a heating plate 3, a clamping plate 1 4, a clamping plate 2 5, a thermistor 6, a temperature controller, a heating rod 1 7, a heating rod 2 8, a relay 1 9, and a relay 2 10.

[0032] Before bonding, the gasket 1 is installed in the inner cavity of the inflatable sealing ring to play a fixing and supporting role. The cross-section of the inflatable sealing ring to be bonded fits the internal contour of the clamping plate. The clamping plate 1 4 and the clamping plate 2 5 are fixed to the base plate 2 by bolts. The gasket 1 and the base plate 2 are also fixed by bolts. The heating plate 3 is pressed into the space between the inflatable sealing ring and the base plate 2 along the contour of the inflatable sealing ring and fixed by bolts. At this time, the guiding effect of the inflatable sealing ring between the heating plate 3, the clamping plate 1 4, the clamping plate 2 5 and the base plate 2 presses the two bonding end faces of the inflatable sealing ring together to ensure that the bonding cross-section of the inflatable sealing ring can fit tightly.

[0033] Preferably, the inner contours of the clamping plate 1 4 and the clamping plate 2 5 are adapted to the cross-sectional shape of the inflatable sealing ring, and the two ends of the inflatable sealing ring are clamped and fixed to the base plate 2 by bolts before bonding.

[0034] Preferably, the inner contour of the heating plate 3 is adapted to the cross-sectional shape of the inflatable sealing ring, the inflatable sealing ring is pressed into the inflatable sealing ring along the contour, and is fixedly connected to the bottom plate 2 by bolts to play a heat conduction role during the bonding process.

[0035] like Figure 13 , as shown in FIG14 , the heating rod 1 7 and the heating rod 2 8 and the thermistor 6 are inserted into the tool through the heating hole on the heating plate 3. During the bonding process, the temperature controller receives the temperature signal input by the thermistor 6 and processes the temperature signal, and outputs it to the relay 1 9 and the relay 2 10 to control the heating rod 1 7 and the heating rod 2 8 to heat the inside of the tooling. At the same time, after the temperature rises, the temperature signal received by the thermistor 6 is continuously fed back to the temperature controller, forming a closed-loop control to achieve nonlinear temperature rise in the tooling heating process (see FIG14 ). Figure 15 ) to ensure that the inflatable sealing ring is vulcanized at the optimal temperature.

Claims

1. A bonding tool for an inflatable seal ring of a stern shaft sealing device, characterized by: The invention comprises a gasket, a base plate, a heating plate, a clamping plate, a thermistor, a temperature controller, a relay and a heating rod. The gasket is installed in the inner cavity of the inflatable sealing ring before the inflatable sealing ring is bonded to fix and support the inflatable sealing ring and make the cross section of the inflatable sealing ring to be bonded fit with the inner contour of the clamping plate, and the bottom of the gasket is fixedly connected to the base plate, and the clamping plates are fixedly connected to the front and rear ends of the base plate respectively. A heating plate is placed between the two clamping plates, and the heating plate is pressed into the inflatable sealing ring along the contour of the inflatable sealing ring and fixedly connected to the base plate, so that the inflatable sealing ring is guided by the heating plate, the two clamping plates and the base plate to press the two bonding end faces of the inflatable sealing ring together, thereby ensuring that the bonding cross section of the inflatable sealing ring can fit tightly; the heating rod and the thermistor are inserted into the bonding tool through the heating hole on the heating plate to heat and complete the thermal vulcanization of the inflatable sealing ring; the input end of the temperature controller is connected to the thermistor, and the output end is connected to the heating rod through the relay.

2. The bonding tool for the inflatable seal ring of the stern shaft sealing device according to claim 1, characterized in that: The inner contours of the two clamping plates are adapted to the cross-sectional shape of the inflatable sealing ring. Before bonding, the two ends of the inflatable sealing ring are clamped and fixed to the base plate by bolts.

3. The bonding tool for the inflatable seal ring of the stern shaft sealing device according to claim 1, characterized in that: The inner contour of the heating plate is adapted to the cross-sectional shape of the inflatable sealing ring. The inflatable sealing ring is pressed into the inflatable sealing ring along the contour and is fixedly connected to the base plate by bolts to conduct heat during the bonding process.

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