Observation device for monitoring looseness of hydraulic nut of rudderstock

Abstract

The utility model relates to an observation device for monitoring looseness of a hydraulic nut of a rudderstock. A rudderstock and a rudder blade are connected in a hydraulic taper fit mode, a hydraulic nut is installed between the rudderstock and the rudder blade, the installation shell is arranged on the rudder blade, a closed area is defined by the installation shell and the rudder blade, and an installation groove is formed in the wall of the installation shell in a penetrating mode. The mounting seat is arranged in the mounting groove, a closed transparent plate is mounted on the mounting seat, and the closed transparent plate separates the inner side and the outer side of the mounting groove and is provided with an indication mark; the indicating piece is installed on the hydraulic nut, and the indicating piece is used for indicating the position state of the indicating mark so as to represent whether the hydraulic nut is loosened or not. According to the utility model, whether the hydraulic nut connected with the rudder blade and the rudderstock is loosened or not can be checked without dismounting the rudder blade hydraulic nut sealing plate or when the rudder blade is underwater.

Description

Technical Field

[0001] This utility model relates to the field of marine technology, and in particular to an observation device for monitoring the loosening of the hydraulic nut on the rudder stock. Background Technology

[0002] In recent years, due to advancements in shipbuilding technology, various types of large-tonnage vessels have been introduced to the market. As ship tonnage increases, the area of ​​the rudder blades used for steering control also grows larger, rendering the traditional keyed connection between the rudder stock and blades inadequate for design requirements. Currently, the mainstream connection between the rudder stock and blades uses a tapered hydraulic keyless connection, secured with hydraulic nuts. However, this tapered hydraulic keyless connection has a fatal flaw: if the hydraulic nuts loosen, during rudder blade rotation, the hydrodynamic forces can easily cause the tapered connection between the rudder blade and rudder stock to detach, resulting in the rudder stock rotating while the blade remains stationary. This prevents the ship from steering, potentially leading to a safety hazard.

[0003] To address the aforementioned issues, crew members need to periodically inspect the hydraulic nuts connecting the rudder stock and rudder blade for looseness. Since these hydraulic nuts are installed within the enclosed area of ​​the rudder blade, checking for looseness requires the vessel to dock and use flame cutting to remove the sealing plates in that area. This undoubtedly increases the vessel's operating costs. Therefore, a simple and readily available device is needed to allow for underwater inspection of the hydraulic nuts at the dock, thereby determining whether the nuts connecting the rudder stock and rudder blade are loose. Summary of the Invention

[0004] Therefore, this utility model provides an observation device for monitoring the loosening of the hydraulic nut of the rudder stock, which can check whether the hydraulic nut connecting the rudder blade and the rudder stock is loose without disassembling the hydraulic nut sealing plate of the rudder blade or when the rudder blade is underwater.

[0005] To solve the above-mentioned technical problems, this utility model provides an observation device for monitoring the loosening of the hydraulic nut on the rudder stock. The rudder stock and the rudder blade are connected by a hydraulic tapered fit, and a hydraulic nut is installed between them. The observation device includes:

[0006] A mounting housing is disposed on the rudder blade and forms a closed area with the rudder blade. A mounting groove is provided through the wall of the mounting housing.

[0007] A mounting base is provided in the mounting slot, and a closed transparent plate is installed on the mounting base. The closed transparent plate separates the inner and outer sides of the mounting slot and has indicator marks.

[0008] An indicator is mounted on the hydraulic nut and is used to indicate the position of the indicator mark to indicate whether the hydraulic nut is loose.

[0009] In one embodiment of the present invention, the indicator includes an indicator rod connected to the hydraulic nut and extending axially along the hydraulic nut, and an indicator needle extending radially along the indicator rod, the indicator needle pointing to the indicator mark.

[0010] In one embodiment of this utility model, the mounting base has a stepped hole with a first step and a buffer pad on the first step. The closed transparent plate abuts against the buffer pad, and a middle spacer is installed in the stepped hole, pressing the middle spacer against the transparent plate.

[0011] In one embodiment of this utility model, the intermediate spacer sleeve is threadedly connected to the stepped hole.

[0012] In one embodiment of this utility model, an outer cover plate is installed on the stepped hole, and the outer cover plate abuts against the intermediate spacer sleeve.

[0013] In one embodiment of this utility model, the stepped hole is provided with a second step coaxially arranged with the first step, the outer cover plate is threaded to the stepped hole and extends radially with a sealing disc that abuts against the second step, and a sealing ring is provided between the sealing disc and the second step.

[0014] In one embodiment of this utility model, the buffer pad is a rubber pad.

[0015] In one embodiment of this utility model, the axis of the stepped hole is perpendicular to the axis of the hydraulic nut.

[0016] In one embodiment of this utility model, the mounting shell includes a left sealing plate, a right sealing plate, a bottom sealing plate, a front vertical stiffener, and a rear vertical stiffener, which are respectively welded to the rudder blade, and a bottom sealing plate, which is respectively welded to the inner sidewall of the left sealing plate, the right sealing plate, the bottom sealing plate, the front vertical stiffener, and the rear vertical stiffener.

[0017] In one embodiment of this utility model, the enclosed transparent plate is made of plexiglass.

[0018] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0019] The present invention discloses an observation device for monitoring the loosening of hydraulic nuts on a rudder post. By setting an installation shell on the rudder blade and reserving an observation channel with a closed transparent plate on the shell, the device enables quick inspection of the loosening of hydraulic nuts when the ship is docked or underwater, without the need to cut the sealing plate or disassemble the nut area, thus significantly reducing the operating and maintenance costs of the ship.

[0020] The observation device uses an indicator rod welded to the hydraulic nut and an indicator needle arranged radially along the indicator rod, along with scales or markings on a closed transparent plate, to align the indicator needle with the scale lines. When the hydraulic nut loosens, the indicator needle shifts relative to the scale markings on the transparent plate. The degree of looseness of the hydraulic nut can be determined by visual comparison after removing the outer cover plate. No complicated instruments or professional equipment are required. Crew members can complete the operation using a special wrench, which is convenient for routine inspections and troubleshooting. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] Figure 1 This is a front view of the connection between the rudder blade and the rudder stock of this utility model.

[0023] Figure 2 This is a cross-sectional view of the connection between the rudder blade and the rudder stock of this utility model.

[0024] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0025] Figure 4 This is a diagram of a special wrench.

[0026] Explanation of reference numerals on the accompanying drawings:

[0027] 1. Rudder stock; 2. Rudder blade; 3. Hydraulic nut; 4. Hydraulic nut washer; 5. Indicator; 6. Right end plate; 7. Left end plate; 8. Mounting base; 8a. Indicator rod; 8b. Indicator needle; 9. Buffer pad; 10. Enclosed transparent plate; 11. Outer cover plate; 12. Intermediate spacer sleeve; 13. Sealing ring; 14. Special wrench; 15. Observation device; 16. Bottom end plate; 17. Front vertical stiffener; 18. Rear vertical stiffener. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0029] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0030] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0031] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0032] Reference Figure 1 As shown, this utility model discloses an observation device for monitoring the loosening of the hydraulic nut of the rudder stock. The rudder stock 1 and the rudder blade 2 are connected by a hydraulic tapered fit, and a hydraulic nut 3 is installed between them. A hydraulic nut washer 4 is installed above the hydraulic nut 3.

[0033] Reference Figure 2 As shown, the observation device 15 includes:

[0034] A mounting housing is disposed on the rudder blade 2 and forms a closed area with the rudder blade 2. A mounting groove is provided through the wall of the mounting housing.

[0035] Mounting base 8 is disposed in the mounting slot. A closed transparent plate 10 is installed on the mounting base 8. The closed transparent plate 10 separates the inner and outer sides of the mounting slot and has indicator marks.

[0036] Indicator 5 is installed on the hydraulic nut 3. Indicator 5 is used to indicate the position of the indicator mark to indicate whether the hydraulic nut 3 is loose.

[0037] In one embodiment, the indicator 5 includes an indicator rod 8a welded to the hydraulic nut 3 and extending axially along the hydraulic nut 3, and an indicator needle 8b extending radially along the indicator rod 8a, the indicator needle 8b pointing to the indicator mark. The indicator mark is a scale marking.

[0038] Reference Figure 3As shown, in one embodiment, the mounting base 8 has a stepped hole with a first step and a buffer pad 9 on the first step. The closed transparent plate 10 abuts against the buffer pad 9, and a middle spacer 12 is installed in the stepped hole, pressing the middle spacer 12 against the transparent plate.

[0039] In one embodiment, the intermediate spacer 12 is threadedly connected to the stepped hole.

[0040] In one embodiment, an outer cover plate 11 is installed in the stepped hole, and the outer cover plate 11 abuts against the intermediate spacer 12, thereby restricting the movement of the closed transparent plate 10. A disassembly hole is provided on the outer wall of the outer cover plate 11, and the outer cover plate 11 is disassembled using a special wrench 14 (with a pin that mates with the disassembly hole).

[0041] In one embodiment, the stepped hole is provided with a second step coaxially arranged with the first step, the outer cover plate 11 is threaded to the stepped hole and extends radially with a sealing disc that abuts against the second step, and a sealing ring 13 is provided between the sealing disc and the second step to improve the sealing performance and prevent seawater from entering the mounting shell.

[0042] In one embodiment, the mounting groove is formed on the right sealing plate 6, the mounting base 8 is fixed to the right sealing plate 6 by welding, and the buffer pad 9 is a rubber pad.

[0043] In one embodiment, the axis of the stepped hole is perpendicular to the axis of the hydraulic nut 3.

[0044] In one embodiment, the mounting housing includes a left sealing plate 7, a right sealing plate 6, a bottom sealing plate 16, a front vertical stiffener 17, and a rear vertical stiffener 18, which are respectively welded to the rudder blade 2, and a bottom sealing plate 16, which is respectively welded to the inner sidewall of the left sealing plate 7, the right sealing plate 6, the bottom sealing plate 16, the front vertical stiffener 17, and the rear vertical stiffener 18.

[0045] In one embodiment, the enclosed transparent panel 10 is made of plexiglass.

[0046] Mounting base 8 is fixed to the right sealing plate 6 by partially modifying the sealing plate of rudder blade 2 or by reserving a mounting groove. Simultaneously, the use of multi-stage stepped holes, sealing ring 13, rubber buffer pad 9, and outer cover plate 11 ensures high sealing performance and high reliability of the device. The enclosed transparent plate 10 (made of materials such as plexiglass) has excellent corrosion resistance and impact resistance. Through the tight clamping of the intermediate spacer 12 and outer cover plate 11, and the shock absorption protection of the buffer pad 9, it can withstand a certain amount of water pressure impact, ensuring that seawater does not easily seep into the mounting housing during long-term use.

[0047] The working principle of this utility model is as follows: If it is necessary to observe whether the hydraulic nut 3 is loose, the outer cover plate 11 is disassembled with a special wrench 14. The relative displacement between the indicator needle 8b of the indicator 5 and the indicator mark on the closed transparent plate 10 is checked by visual inspection. If the relative displacement occurs, it indicates that the hydraulic nut 3 is loose and the ship needs to enter the dry dock for maintenance, thereby avoiding the risk of ship accidents.

[0048] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A monitoring device for monitoring the loosening of a hydraulic nut on a rudder stock, wherein the rudder stock (1) and the rudder blade (2) are connected by a hydraulic tapered fit, and a hydraulic nut (3) is installed between them, characterized in that, The observation device (15) includes: The mounting housing is disposed on the rudder blade (2) and forms a closed area with the rudder blade (2). The mounting housing has a through-hole groove on its wall. Mounting base (8) is provided in the mounting slot. A closed transparent plate (10) is installed on the mounting base (8). The closed transparent plate (10) separates the inner and outer sides of the mounting slot and has an indicator mark. An indicator (5) is installed on the hydraulic nut (3). The indicator (5) is used to indicate the position of the indicator mark to indicate whether the hydraulic nut (3) is loose.

2. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 1, characterized in that, The indicator (5) includes an indicator rod (8a) connected to the hydraulic nut (3) and extending axially along the hydraulic nut (3) and an indicator needle (8b) extending radially along the indicator rod (8a), the indicator needle (8b) pointing to the indicator mark.

3. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 1, characterized in that, The mounting base (8) has a stepped hole with a first step and a buffer pad (9) on the first step. The closed transparent plate (10) abuts against the buffer pad (9). A middle spacer (12) is installed in the stepped hole and is pressed against the transparent plate.

4. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 3, characterized in that, The intermediate spacer (12) is threadedly connected to the stepped hole.

5. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 3, characterized in that, An outer cover plate (11) is installed in the stepped hole, and the outer cover plate (11) abuts against the intermediate spacer sleeve (12).

6. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 5, characterized in that, The stepped hole is provided with a second step coaxially arranged with the first step. The outer cover plate (11) is threaded to the stepped hole and extends radially with a sealing disc that abuts against the second step. A sealing ring (13) is provided between the sealing disc and the second step.

7. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 3, characterized in that, The buffer pad (9) is made of rubber.

8. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 3, characterized in that, The axis of the stepped hole is perpendicular to the axis of the hydraulic nut (3).

9. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 1, characterized in that, The mounting housing includes a left sealing plate (7), a right sealing plate (6), a bottom sealing plate (16), a front vertical stiffener (17), and a rear vertical stiffener (18) respectively welded to the rudder blade (2), and a bottom sealing plate (16) respectively welded to the inner sidewall of the left sealing plate (7), the right sealing plate (6), the bottom sealing plate (16), the front vertical stiffener (17), and the rear vertical stiffener (18).

10. The observation device for monitoring the loosening of the hydraulic nut of the rudder stock according to claim 1, characterized in that, The enclosed transparent panel (10) is made of plexiglass.

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