Hull tightness test device
By designing a device for hull density testing, the adjustment screw and drive members are used to closely adhere to the end of the stern tube, the problems of complex operation and structural damage in the prior art are solved, and a more efficient and safe density testing process is achieved.
Patent Information
- Application Number
- CN202421175808.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The prior art When conducting dense tests on ship stern shaft tubes, the operation is complicated, it consumes a lot of labor and materials, and it is easy to damage the stern shaft structure.
A hull density test device is designed, and a hull is driven to the end of the stern tube by using the adjusting screw and the driving member to achieve sealing without welding, and avoiding damage to the stern tube by cutting off the welded part.
Simplified density test operations, reduced labor and material consumption, avoided damage to the stern shaft structure, and reduced the need for later polishing.
Smart Images
Figure CN222544940U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ships, and particularly relates to a hull tightness testing device. Background Art
[0002] During the shipbuilding process, it is necessary to conduct a tightness test on the bulkhead joints of the ship's cabins to ensure the ship's sealing. Since the ship is manufactured in sections, it is necessary to conduct a tightness test on the relevant sections to ensure the quality of the section construction. After the section manufacturing is completed, individual smaller cabins can complete the cabin inflation tightness test. The hull cabin tightness test is to conduct an inflation pressure test on the cabin according to different parts to keep the hull structure welds under a certain pressure state.
[0003] In the process of tightness test on the segment, the stern section in the ship segment is difficult to build, and the tightness of the stern tube is also quite high. In the prior art, when the stern tube is tested for tightness, it is necessary to weld the circular cover on the bracket for fixing, then turn the stern section over from vertical to horizontal, and then cover the end of the stern tube for tightness test. And before the test, it is necessary to weld the cover and the stern steel casting to cover the end of the stern tube so that it meets the tightness test requirements. After the tightness test is completed, the welding part of the circular cover and the stern steel casting is cut off. In this process, it is easy to damage the stern steel casting and affect the strength of the stern structure. Even if the stern steel casting is not damaged during the cutting process, the cut part needs to be polished later, which increases a lot of polishing work later. Therefore, the operation of tightness test on ships is complicated and consumes more labor and materials. Utility Model Content
[0004] In view of the deficiencies of the prior art, the utility model provides a hull tightness testing device to solve the problem of how to perform a tightness test on the hull.
[0005] A hull tightness test device, the test device comprising:
[0006] An adjusting screw, wherein a first thread is provided on the first end of the adjusting screw, and a second thread is provided on the second end of the adjusting screw, a first ball nut is sleeved on the first thread, and the first ball nut is embedded in the first movable plate, and a second ball nut is sleeved on the second thread, and the second ball nut is embedded in the second movable plate; wherein the thread rotation directions of the first thread and the second thread are opposite, and sealing grooves are provided on the first movable plate and the second movable plate.
[0007] A driving member, wherein the driving member is connected to the first end of the adjusting screw rod or the second end of the adjusting screw rod to drive the adjusting screw rod to rotate, so that the first movable plate and the second movable plate move toward each other.
[0008] Wherein, when the hull is subjected to a tightness test, the adjusting screw is inserted into the stern tube of the hull, and the driving member drives the first movable plate and the second movable plate to be tightly attached to both ends of the stern tube of the hull at the same time.
[0009] Preferably, the test device also includes a first support plate and a second support plate, and the first support plate and the second support plate are both arranged at both ends of the adjusting screw rod, and are used to support the adjusting screw rod so that the two ends of the adjusting screw rod remain in a horizontal state; wherein the first support plate and the second support plate both include a conical support plate and a semicircular opening formed in the conical support plate, and the semicircular opening is used to place the adjusting screw rod.
[0010] Preferably, threaded holes are provided on the first movable plate and the second movable plate, and fixing rods are connected to the threaded holes of the first movable plate and the second movable plate, and the fixing rods are used to fasten the first movable plate and the second movable plate to both ends of the stern tube of the hull.
[0011] Preferably, the driving member is a driving motor or a handle.
[0012] Preferably, the test device also includes: an air supply unit, the air supply unit includes an air pressure tank, and the air pressure tank is used to provide the gas required during the hull tightness test; a gas delivery unit, the gas delivery unit includes a gas delivery pipeline and a control valve arranged on the gas delivery pipeline, the gas delivery pipeline is connected to the air pressure tank, and is used to deliver the gas in the air pressure tank to the hull tightness test part; a monitoring unit, the monitoring unit includes a pressure gauge, the pressure gauge is connected to the gas delivery pipeline, and is used to monitor the pressure in the gas delivery pipeline, thereby monitoring the pressure condition of the hull tightness test part.
[0013] Preferably, the handle includes a sleeve and a connecting rod vertically connected to the sleeve, a hand-held rod is vertically connected to the connecting rod, an end of the adjusting screw rod is inserted into the sleeve, and an excess gap is formed between the end of the adjusting screw rod and the sleeve.
[0014] The hull tightness test device provided by the utility model has two sections of threads with opposite rotation directions arranged on the adjusting screw rod, a movable plate is arranged on each section of the threads, a ball nut is embedded in each movable plate, the ball nut is screwed on the thread section of the adjusting screw rod, and the entire adjusting screw rod is driven to rotate by a driving member. Since the rotation directions of the two sections of the threads are opposite, the two ball nuts will move towards each other when the adjusting screw rod rotates, so that the two movable plates move toward the ends of the hull stern tube at the same time, and are tightly attached to the two ends of the hull stern tube at the same time, so that the two ends of the hull stern tube can be sealed. There is no need to seal the stern tube by welding at the end of the stern tube, thereby avoiding damage to the stern tube caused by cutting off the welding part. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following will briefly introduce the drawings required for the description of the embodiment. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.
[0016] Figure 1 It is a structural schematic diagram of the test device provided by the utility model;
[0017] Figure 2 It is a schematic diagram of the working state of the test device provided by the utility model;
[0018] Figure 3 It is a structural schematic diagram of the adjusting screw rod of the test device provided by the utility model;
[0019] Figure 4 It is a structural schematic diagram of the first movable plate of the test device provided by the utility model;
[0020] Figure 5 It is a structural schematic diagram of the second movable plate of the test device provided by the utility model;
[0021] Figure 6 It is a structural schematic diagram of the first support plate of the test device provided by the utility model;
[0022] Figure 7 It is a structural schematic diagram of the test device provided by the utility model. DETAILED DESCRIPTION
[0023] 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.
[0024] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0025] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If the terms "first", "second", "third" are described, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of the embodiments of the present invention based on its overall structure.
[0027] Figure 1 It is a structural schematic diagram of the test device provided by the utility model. Figure 3 It is a structural schematic diagram of the adjusting screw rod of the test device provided by the utility model. Figure 5 This is a schematic diagram of the structure of the first movable plate of the test device provided by the utility model, see Figure 1 , Figure 3 and Figure 5 , the test device comprises:
[0028] An adjusting screw 1, wherein a first thread 11 is provided on the first end of the adjusting screw 1, and a second thread 12 is provided on the second end of the adjusting screw 1, a first ball nut 21 is sleeved on the first thread 11, and the first ball nut 21 is embedded in the first movable plate 31, and a second ball nut 22 is sleeved on the second thread 12, and the second ball nut 22 is embedded in the second movable plate 32; wherein the thread rotation directions of the first thread 11 and the second thread 12 are opposite, and sealing grooves 34 are provided on the first movable plate 31 and the second movable plate 32.
[0029] A driving member 5 , wherein the driving member 5 is connected to the first end of the adjusting screw rod 1 or the second end of the adjusting screw rod 1 to drive the adjusting screw rod 1 to rotate, so that the first moving plate 31 and the second moving plate 32 move toward each other.
[0030] When the hull is subjected to a tightness test, the adjusting screw rod 1 is passed through the interior of the stern tube of the hull, and the driving member 5 drives the first movable plate 31 and the second movable plate 32 to be tightly attached to both ends of the stern tube of the hull at the same time.
[0031] Figure 2 This is a schematic diagram of the working state of the test device provided by the utility model, see Figure 1-Figure 5 Specifically, a first thread 11 is provided on the first end of the adjusting screw 1, and a second thread 12 is provided on the second end of the adjusting screw 1, wherein the first thread 11 and the second thread 12 rotate in opposite directions. The first ball nut 21 matches the first thread 11, and the second ball nut 22 matches the second thread 12. Therefore, when the entire adjusting screw 1 rotates, the first ball nut 21 and the second ball nut 22 can simultaneously move toward each other on the first thread 11 and the second thread 12 of the adjusting screw 1 respectively.
[0032] See also Figure 1 As a preferred embodiment, the test device further comprises a first support plate 41 and a second support plate 42. The first support plate 41 and the second support plate 42 are used to support both ends of the adjusting screw rod 1 so that both ends of the entire adjusting screw rod 1 are in a horizontal state without tilting.
[0033] Figure 6 This is a schematic diagram of the structure of the first support plate of the test device provided by the utility model, see Figure 6The first support plate 41 includes a conical support plate 410, and a semicircular opening 4100 is formed on the conical support plate 410. The semicircular opening 4100 matches the two ends of the adjusting screw rod 1, so that the end of the adjusting screw rod 1 can be placed in the semicircular opening 4100, which is also convenient for taking and placing the adjusting screw rod 1 when supporting the adjusting screw rod 1. The shape of the second support plate 42 is the same as that of the first support plate 41.
[0034] See also Figure 2 , the driving member 5 drives the adjusting screw 1 to rotate clockwise, at which time the first movable plate 31 moves to the right under the action of the first ball nut 21, and the second movable plate 32 moves to the left under the action of the second ball nut 22. Before the test, the entire adjusting screw 1 is first passed through the stern tube of the hull so that both ends of the adjusting screw are exposed outside the stern tube, and then the first support plate 41 and the second support plate 42 are used to support both ends of the adjusting screw 1 so that both ends of the adjusting screw 1 remain horizontal, and then the movable plates with ball nuts embedded therein are respectively screwed onto the adjusting screw 1, and then the driving member 5 is installed. In this way, when the adjusting screw 1 rotates clockwise, the two movable plates can move toward both ends of the stern tube at the same time and are tightly attached to the ends of the stern tube. When the test is completed, the driving member 5 drives the adjusting screw 1 to rotate counterclockwise. At this time, the first movable plate 31 moves to the left under the action of the first ball nut 21, and the second movable plate 32 moves to the right under the action of the second ball nut 22. The first movable plate 31 and the second movable plate 32 leave the end of the stern tube respectively and simultaneously.
[0035] Specifically, a sealing groove 34 is provided on the first movable plate 31 and the second movable plate 32. The sealing groove 34 is set according to the actual situation of the end of the stern tube. A sealing strip is added in the sealing groove 34 to achieve a sealing effect. The sealing strip can be made of soft rubber.
[0036] The test device provided in the above embodiment does not need to weld a cover plate at the end of the stern tube, thus avoiding the need to cut off the welded part and the grinding process, thereby avoiding damage to the stern tube during the test. The entire device is detachable and easy to operate.
[0037] As a preferred embodiment, the first movable plate 31 and the second movable plate 32 are circular movable plates, and sealing grooves are also provided on the circular movable plates, and ball nuts are also embedded in the circular movable plates.
[0038] In this embodiment, the first moving plate 31 and the second moving plate 32 are square moving plates that slide on the adjusting screw rod 1 .
[0039] See also Figure 1 As a preferred embodiment, threaded holes are provided on the first movable plate 31 and the second movable plate 32, and fixing rods 6 are connected to the threaded holes of the first movable plate 31 and the second movable plate 32, and the fixing rods 6 are used to fasten the first movable plate 31 and the second movable plate 32 to the two ends of the stern tube of the hull.
[0040] Specifically, as a preferred embodiment, the number of the fixing rods 6 is four, or three, or two. In the most preferred implementation embodiment, the number of the fixing rods 6 is four, and four threaded holes are respectively set at the four corners of the first movable plate 31 and the second movable plate 32, and threads are set at both ends of each fixing rod 6 to form a threaded section. When the two first movable plates 31 and the second movable plates 32 are both tightly attached to the end of the stern tube of the hull, the fixing rod 6 is then inserted into the first movable plate 31 and the second movable plate 32, so that the threads on the fixing rod 6 can be screwed into the threaded holes of the first movable plate 31 and the second movable plate 32, and then the gasket is inserted into the fixing rod 6, and the nut is used on this side to achieve the extrusion between the first movable plate 31 and the second movable plate 32, so that the first movable plate 31 and the second movable plate 32 are tightly pressed against the end of the stern tube of the hull, so that the first movable plate 31 and the second movable plate 32 have a better sealing effect on the stern tube of the hull.
[0041] Preferably, the driving member 5 is a driving motor or a handle.
[0042] The handle is a preferred embodiment of the drive member 5, see Figure 2 The handle includes a sleeve 51 and a connecting rod 52 vertically connected to the sleeve 51, a hand-held rod 53 is vertically connected to the connecting rod 52, and the end of the adjusting screw rod 1 is inserted into the sleeve 51, and there is an excessive gap between the end of the adjusting screw rod 1 and the sleeve 51. The excessive gap between the end of the adjusting screw rod 1 and the sleeve 51 can enable the handle to be stably connected to the end of the adjusting screw rod 1, and prevent the handle from slipping out of the shaft end of the adjusting screw rod 1 during rotation.
[0043] When a driving motor is selected as the preferred implementation scheme, the shaft end of the adjusting screw rod 1 is connected to the output end of the driving motor, and the adjusting screw rod 1 is driven to rotate by the driving motor, so that the adjusting screw rod 1 does not need to be rotated manually.
[0044] Figure 7 This is a schematic diagram of the structure of the test device provided by the utility model. Figure 7As a preferred embodiment, the test device also includes: an air supply unit, the air supply unit includes an air pressure tank 7, and the air pressure tank 7 is used to provide the gas required during the hull tightness test; a gas delivery unit, the gas delivery unit includes a gas delivery pipeline 8 and a control valve 9 arranged on the gas delivery pipeline 8, the gas delivery pipeline 8 is connected to the air pressure tank 7, and is used to deliver the gas in the air pressure tank 7 to the hull tightness test part; a monitoring unit, the monitoring unit includes a pressure gauge 10, and the pressure gauge 10 is connected to the gas delivery pipeline 8, and is used to monitor the pressure in the gas delivery pipeline 8, thereby monitoring the pressure condition of the hull tightness test part.
[0045] As a preferred embodiment, the gas supply unit, gas transmission unit and monitoring unit are used to provide gas to the hull during the hull tightness test and monitor the pressure during the hull tightness test. For example, the air pressure tank 7, the gas transmission pipeline 8, the control valve 9 and the pressure gauge 10 can be set according to the actual situation. One air pressure tank 7 can be set, and one air pressure tank 7 is equipped with multiple gas transmission pipelines 8, and each gas transmission pipeline 8 is connected to different parts of the hull, such as the cabin and the stern tube of the hull.
[0046] As a preferred implementation scheme, the gas transmission unit can control the input gas pressure, assisted by the monitoring unit, to avoid cabin explosion and structural deformation caused by excessive pressure during the pressurization process.
[0047] This embodiment also provides a hull tightness test method, using the above-mentioned test device, the test method includes:
[0048] S10. Fill the hull cabin and the stern tube with gas through the gas supply unit and the gas transmission unit, so that the welded structural parts on the hull cabin and the stern tube are kept in a certain pressure state.
[0049] Specifically, when performing a tightness test on a hull cabin, gas is filled into the hull cabin through a pressure tank to keep the hull structure weld on the hull cabin under a certain pressure. When performing a tightness test on a hull stern tube, the two ends of the hull stern tube are first sealed with the above-mentioned test tooling, and then gas is filled into it through a pressure tank to keep the weld on the stern tube under a certain pressure, thus meeting the prerequisite requirements for the hull tightness test.
[0050] S20. Use the monitoring unit to monitor the pressure state in the hull cabin and the stern tube of the hull to avoid cabin explosion and structural deformation caused by excessive pressure during the pressurization process.
[0051] Specifically, a pressure gauge is used in the monitoring unit, and the pressure gauge can display the pressure status in real time, thus being helpful for inflation.
[0052] S30. Spray soapy water sandblasting onto the hull cabin and the welding structure on the stern tube of the hull to check whether there is bubbling or leakage in the welding structure. If there is, it means that the welding structure is leaking.
[0053] Specifically, when the relevant structural welds on the hull cabin are under pressure, soapy water is sprayed on the relevant structural welds from the outside, and then the relevant structural welds are checked to see if there is bubbling or leakage. If there is bubbling or leakage, it proves that there is leakage at the weld location.
[0054] S40, if there is leakage in the welded structure of the hull cabin and the stern tube, the part is re-welded to repair the leakage, and the above steps S10 to S30 are repeated until there is no leakage in the weld.
[0055] Specifically, when it is detected that there is a leak at the relevant weld position, the weld position should be repaired in accordance with the process requirements, and the repaired leak point should be sprayed with soapy water again until there is no sign of leakage in the weld.
[0056] The hull tightness test method provided in the above embodiment can detect whether there is air leakage at the welding position of the hull by using soapy water, which is simple, convenient and easy to operate.
[0057] In summary, the test device provided by the utility model can perform a tightness test on the stern tube of the hull and other small cabins of the hull, and the test process will not cause damage to the stern tube, thereby reducing the workload.
[0058] The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed after reading this specification without departing from the principles and purpose of the present invention, but they are protected by patent law as long as they are within the scope of the claims of the present invention.
Claims
1. A hull tightness test device, characterized in that: The test device comprises: An adjusting screw (1), wherein a first thread (11) is provided on a first end of the adjusting screw (1), and a second thread (12) is provided on a second end of the adjusting screw (1); a first ball nut (21) is sleeved on the first thread (11), and the first ball nut (21) is embedded in a first movable plate (31); a second ball nut (22) is sleeved on the second thread (12), and the second ball nut (22) is embedded in a second movable plate (32); wherein the first thread (11) and the second thread (12) have opposite thread rotation directions, and sealing grooves (34) are provided on the first movable plate (31) and the second movable plate (32); a driving member (5), the driving member (5) being connected to the first end of the adjusting screw rod (1) or the second end of the adjusting screw rod (1) to drive the adjusting screw rod (1) to rotate, so that the first movable plate (31) and the second movable plate (32) move towards each other; When the hull is subjected to a tightness test, the adjusting screw (1) is inserted into the interior of the stern tube of the hull, and the driving member (5) drives the first movable plate (31) and the second movable plate (32) to simultaneously cling to both ends of the stern tube of the hull.
2. The hull tightness test device according to claim 1, characterized in that: The test device further comprises a first support plate (41) and a second support plate (42), wherein the first support plate (41) and the second support plate (42) are both arranged at two ends of the adjusting screw rod (1) and are used to support the adjusting screw rod (1) so that the two ends of the adjusting screw rod (1) remain in a horizontal state; wherein the first support plate (41) and the second support plate (42) both comprise a conical support plate and a semicircular opening formed in the conical support plate, and the semicircular opening is used to place the adjusting screw rod (1).
3. The hull tightness test device according to claim 1, characterized in that: The first movable plate (31) and the second movable plate (32) are provided with threaded holes, and fixing rods (6) are connected in the threaded holes of the first movable plate (31) and the second movable plate (32). The fixing rods (6) are used to fasten the first movable plate (31) and the second movable plate (32) to the two ends of the stern tube of the hull.
4. The hull tightness test device according to claim 1, characterized in that: The driving member (5) is a driving motor or a handle.
5. The hull tightness test device according to claim 1, characterized in that: The test device also includes: An air supply unit, the air supply unit comprising an air pressure tank (7), the air pressure tank (7) being used to provide the gas required during the hull tightness test; A gas delivery unit, the gas delivery unit comprising a gas delivery pipeline (8) and a control valve (9) arranged on the gas delivery pipeline (8), the gas delivery pipeline (8) being connected to the air pressure tank (7) and being used for delivering the gas in the air pressure tank (7) to a hull tightness test location; A monitoring unit, the monitoring unit comprising a pressure gauge (10), the pressure gauge (10) being connected to the gas pipeline (8) and used for monitoring the pressure in the gas pipeline (8), thereby monitoring the pressure condition of the hull tightness test part.
6. The hull tightness test device according to claim 4, characterized in that: The handle comprises a sleeve (51) and a connecting rod (52) vertically connected to the sleeve (51); a hand-held rod (53) is vertically connected to the connecting rod (52); the end of the adjusting screw rod (1) is inserted into the sleeve (51); and an excessive gap is formed between the end of the adjusting screw rod (1) and the sleeve (51).