Temporary blind plate for decompression starting ship

Abstract

The invention discloses a temporary blind plate for a decompression starting ship, which comprises a blind plate flange, a blind plate handle extending from any position of the blind plate flange in the circumferential direction, and a blind plate patch, the blind plate patch comprises a patch body, and a first extension sheet body and a second extension sheet body respectively extending in two opposite directions from any position on the patch body, the first extension sheet body extends towards the center of the blind plate, the patch body and the first extension sheet body are attached to the blind plate flange, and the second extension sheet body is attached to the blind plate handle. After the pipeline tightness test is finished, a worker can be reminded to dismantle the temporary blind plate in time, and the situation that the temporary blind plate is left at the pipeline butt joint position, normal use of follow-up pipelines is affected, and quality accidents are caused is avoided.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a temporary blind flange for decompression and start-up of ships. Background Technology

[0002] Currently, before conducting a tightness test on marine segmented piping, a temporary blind flange must be installed between two opposing pipe flanges to isolate the piping, ensure tightness pressure, and prevent tightness pressure leakage through the flanges. After the tightness test is completed, the temporary blind flange must be removed from the piping.

[0003] However, in actual construction, due to the complex operating conditions of the pipeline system, construction workers often forget to remove the temporary blind flange, leaving it inside the pipeline. This can cause the temporary blind flange to blindly disconnect the pipeline, resulting in blockage of the medium inside the pipeline, affecting the normal use of the pipeline and leading to quality accidents. For example, in environments where it is difficult to construct, such as cooling water pipelines for marine main and auxiliary engines, pipelines in the deck overhang area, or confined spaces, if the pipeline is blindly disconnected, it will directly cause the marine equipment to overheat, shut down, or be damaged. Summary of the Invention

[0004] In view of this, the present invention provides a temporary blind flange for decompression starting of a ship, in order to solve the problems existing in the above-mentioned background art.

[0005] A temporary blind flange for decompression starting on a ship includes a blind flange flange, a blind flange handle extending from any position in the circumference of the blind flange flange, and a blind flange patch. The blind flange flange has a plurality of bolt holes in the circumferential direction corresponding to the flange holes of the pipeline flange.

[0006] The blind flange patch includes a patch body, a first extension piece and a second extension piece extending from any position on the patch body in two opposite directions, wherein the first extension piece extends toward the center of the blind flange, the patch body and the first extension piece are attached to the blind flange flange, and the second extension piece is attached to the blind flange handle.

[0007] The patch body is internally encapsulated with an electrolyte solution, and the electrolyte solution can enter the buffer cavity under the squeezing force generated when the pipeline flange is tightened.

[0008] The first extension sheet has an internal hollow structure and a buffer cavity is formed at one end near the patch body, and a reaction cavity is formed at the other end. A self-reactive power device is installed in the reaction cavity. An alarm device is installed in the second extension sheet and is connected to the self-reactive power device through a wire.

[0009] The first extension plate is also provided with a pressure reduction sensing component, which is used to isolate the buffer chamber and the reaction chamber in stages according to the test progress of the ship pipeline tightness test so that the electrolyte solution can flow from the buffer chamber into the reaction chamber after the tightness test is completed.

[0010] Preferably, the patch body has a double-layer structure, including a patch outer shell, a patch inner shell nested inside the patch outer shell, a first electrolytic component disposed in the space between the patch outer shell and the patch inner shell, and a second electrolytic component disposed in the space inside the patch inner shell. The patch inner shell is ruptured under the squeezing force generated when the pipeline flange is tightened, causing the second electrolytic component (1.5) to mix with the first electrolytic component to form an electrolyte solution.

[0011] Preferably, an isolation membrane is provided at the connection between the patch body and the buffer cavity of the first extension patch body.

[0012] Preferably, the patch body is annular or arc-shaped.

[0013] Preferably, the decompression sensing component includes a decompression airbag and an isolation airbag. The decompression airbag is disposed on the outside of the first extension plate, and the isolation airbag is disposed inside the buffer cavity and shares the same bladder wall with the decompression airbag. In the initial state and during the pipeline tightness test, the isolation airbag is in the expanded and sealed position to separate the buffer cavity and the reaction cavity. After the pipeline tightness test is completed, the isolation airbag is in the contracted and open position to connect the buffer cavity and the reaction cavity.

[0014] Preferably, the self-reactive electrical energy device includes two opposing spacer plates fixed on the reaction chamber, an electrolytic shell disposed between the two spacer plates, an electrolytic assembly disposed inside the electrolytic shell, the two ends of the electrolytic assembly extending out of the two spacer plates respectively and connected to an alarm device via wires, and the electrolytic shell having multiple flow holes for allowing electrolyte solution to flow into the electrolytic shell.

[0015] Preferably, the electrolysis assembly includes a first metal substrate and a second metal substrate.

[0016] The first metal substrate is fixed inside the upper spacer plate, and the end of the first metal substrate extends out of the reaction chamber and is connected to the wire. The second metal substrate is fixed inside the lower spacer plate, and the end of the second metal substrate extends out of the reaction chamber and is also connected to the wire.

[0017] Preferably, the electrolysis assembly further includes a metal foil, one end of which is physically connected to the first metal substrate and the other end of which is physically connected to the second metal substrate. The metal foil is made of a different material than the first and second metal substrates and is the most reactive.

[0018] Preferably, the metal foil also has an adjustment hole penetrating through the foil body at its center, and the adjustment hole is used to adjust the delay start time of the control alarm device.

[0019] Preferably, the alarm device includes an audible and visual alarm.

[0020] The beneficial effects of this invention are:

[0021] 1. This invention designs a temporary blind flange for shipboard decompression starting, which can remind staff to remove the blind flange in a timely manner after the pipeline tightness test, so as to avoid the blind flange being left at the pipeline connection point, affecting the normal use of subsequent pipelines and causing quality accidents.

[0022] 2. This invention incorporates an alarm device within the blind flange patch. This device utilizes the compressive force during pipe flange tightening to spontaneously initiate a chemical reaction, generating current after a specific time to power the alarm device and activate it. This achieves the effect of providing an alarm notification after the pipe tightness test is completed, eliminating the need for an external power supply and making it convenient and widely applicable. Furthermore, the outer shell of the blind flange patch in this application is made of plastic, providing moisture resistance and making it suitable for open-air salt spray environments such as shipyards and marine engineering facilities, ensuring high reliability.

[0023] 3. The patch body of the present invention has two independent spaces inside, each for accommodating two different electrolytic components. The compression force of the pipeline flange can be used to fuse the two electrolytic components into one to form an electrolyte solution, which then enters the self-reactive power device to spontaneously carry out a chemical reaction. Furthermore, by adding a metal foil between the anode and cathode of the self-reactive power device, the metal foil can be directly physically connected to the anode and cathode, enabling the alarm to be activated after a period of time following the completion of the pipeline tightness test. This achieves the effect of providing an alarm notification after the pipeline tightness test is completed. The blind plate patch structure of this application is simple and ingeniously designed, cleverly utilizing the fastening force of the pipeline flange to enable the self-reactive power device to generate current to power the alarm device.

[0024] 4. When tightening the pipeline flange, only the patch body of the present invention is compressed. The first extension patch is located in the center of the pipeline, and the second extension patch is located outside the pipeline. It will not be compressed and will not cause compression damage to the structure of the self-reactive power device and alarm device, thus ensuring high safety.

[0025] 5. This invention can be used in challenging working conditions such as cooling water pipelines for main and auxiliary marine engines, pipelines in the deck overhang area, or confined spaces. It has a wide range of applications and is more applicable. It can also be used for temporary closure of pipelines during pipeline tightness testing before sea trials without causing damage to marine equipment.

[0026] 6. This invention provides a pressure-reducing sensing component on the first extension plate. This component can temporarily block the buffer chamber and reaction chamber inside the first extension plate by utilizing the non-current pressure inside the pipeline during the pipeline tightness test. The electrolyte solution in the buffer chamber will only enter the reaction chamber after the tightness test is completed, thus achieving a first-level delay for the alarm device. The self-reactive power device can provide a second-level delay for the alarm device. By providing a pressure-reducing sensing component on the blind plate patch or by providing a pressure-reducing sensing component and a self-reactive power device with a time delay, the invention can remind workers to remove the temporary blind plate in a timely manner at the end of the tightness test or some time after the end of the tightness test.

[0027] 7. The buffer chamber of the present invention can not only serve as a temporary holding space for the electrolyte solution during the pipeline tightness test, but also allow the two electrolyte components that are not fully mixed in the patch body to be fully mixed in the chamber, thereby ensuring the uniformity of the electrolyte solution. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the installation of the temporary blind flange of the present invention.

[0030] Figure 2 This is a top view of the structure of a blind flange patch attached to a temporary blind flange.

[0031] Figure 3 This is a cross-sectional view of the patch body.

[0032] Figure 4 yes Figure 2 Sectional view along line AA.

[0033] Figure 5 yes Figure 2 Schematic diagram of direction C.

[0034] Figure 6 This is a schematic diagram illustrating the process of the pressure-sensing component of the blind flange patch changing from an expanded, sealed state to a contracted, open state.

[0035] Figure 7 This is a schematic diagram of the structure of a self-reactive electrical energy device.

[0036] Figure 8 This is a side view of a self-reactive electrical energy device.

[0037] Figure 9This is a schematic diagram of the reaction process of a self-reactive electrical energy device.

[0038] Figure 10 This is a schematic diagram of the electrolysis component in a self-reactive power device.

[0039] Figure 11 This is a schematic diagram illustrating the process of blind flange patch installation from blind flange installation to pipeline tightness testing.

[0040] The labels in the diagram mean:

[0041] 1 is the patch body, 1.1 is the separator, 1.2 is the patch outer shell, 1.3 is the patch inner shell, 1.4 is the first electrolytic component, 1.5 is the second electrolytic component, and 1.6 is the electrolyte solution.

[0042] 2 is the first extended sheet body,

[0043] 3 represents the second extended sheet.

[0044] 4 is a buffer chamber.

[0045] 5 is the reaction chamber.

[0046] 6 represents the self-reacting electrical energy device; 6.1 represents the spacer plate; 6.2 represents the electrolytic shell; 6.3 represents the first metal substrate; 6.4 represents the second metal substrate; 6.5 represents the metal foil; 6.6 represents the regulating punch; and 6.7 represents the flow hole.

[0047] 7 represents the alarm device.

[0048] 8 represents a wire.

[0049] 9 is a decompression airbag.

[0050] 10 are isolation airbags.

[0051] 11 is a temporary blind flange, 11.1 is the blind flange flange, and 11.2 is the blind flange handle.

[0052] 12 is a pipe flange. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0054] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0055] It should be understood that although the terms first, second, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0056] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0058] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0059] In Embodiment 1, the present invention provides a temporary blind flange 11 for decompression starting of a ship, including a blind flange 11.1, a blind flange handle 11.2 extending from any position in the circumference of the blind flange 11.1, and a blind flange patch. The blind flange 11.1 has a plurality of bolt holes in the circumferential direction corresponding to the flange holes of the pipeline flange. The size of the blind flange 11.1 is equal to the size of the pipeline flange.

[0060] Specifically, the blind flange patch includes a patch body 1, a first extension piece 2, and a second extension piece 3. The first extension piece 2 and the second extension piece 3 extend from any position on the patch body 1 in two opposite directions. The first extension piece 2 extends toward the center of the temporary blind flange 11, and the second extension piece 3 extends away from the center of the temporary blind flange 11. The patch body 1 and the first extension piece 2 are attached to the blind flange flange 11.1, and the second extension piece 3 is attached to the blind flange handle 11.2.

[0061] The blind flange patch is fixed on the marine temporary blind flange 11. When the marine temporary blind flange 11 is installed between two opposing pipe flanges 12, during the tightening of the pipe flanges 12 and the pipe tightness test, this application undergoes a chemical reaction under the pressure of the tightening flanges and the tightness pressure of the subsequent pipe tightness test, and an alarm is triggered after a specific time to prompt the removal of the marine temporary blind flange. The length of the specific time is greater than the total operation time of the marine temporary blind flange installation and the pipe tightness test.

[0062] The shape of the marine temporary blind plate 11 can be a regular disc-shaped blind plate, or it can be a new type of blind plate with a handle added to a regular disc-shaped blind plate. The marine temporary blind plate used in this embodiment is a new type of blind plate with a handle.

[0063] The patch body 1, the first extension patch 2, and the second extension patch 3 are all hollow structures. The electrolyte solution is independently encapsulated inside the patch body 1, and the electrolyte solution can break through the encapsulation medium and enter the buffer cavity 4 under the squeezing force generated when the pipeline flange 12 is tightened. The buffer cavity 4 is an independent chamber isolated at one end of the first extension patch 2 near the patch body 1. A reaction chamber 5 is formed at the other end of the first extension patch 2, and a self-reacting power device 6 is installed in the reaction chamber 5. An alarm device 7 is installed in the second extension patch 3.

[0064] The buffer chamber 4 and reaction chamber 5 inside the first extended plate 2 are not always connected; they are separated in stages by the pressure-reducing sensing component. During the three stages of "temporary blind flange not installed between the two connecting pipelines," "temporary blind flange installed between the two connecting pipelines and flange tightening," and "pipeline tightness test (including two test stages: pipeline tightness test and pressure holding test; the pipeline tightness test requires time T1, and the pressure holding test requires time T2)," the buffer chamber 4 and reaction chamber 5 are isolated by the pressure-reducing sensing component, and the two chambers are not interconnected. When the pipeline tightness test is completed, the pressure-reducing sensing component "fails," and the buffer chamber 4 and reaction chamber 5 become connected.

[0065] When the buffer chamber 4 and the reaction chamber 5 are connected, the electrolyte solution in the buffer chamber 4 will enter the reaction chamber 5. The self-reacting power device 6 will spontaneously react with the electrolyte solution to generate current, which will power the alarm device 7. The alarm device 7 will then be activated to sound an alarm, achieving the effect of delayed alarm. This will remind the staff to remove the temporary blind plate in time after the pipeline tightness test is completed, so as to avoid leaving the temporary blind plate in the pipeline.

[0066] Specifically, the patch body 1 has a double-layer structure, including a patch outer shell 1.2 and a patch inner shell 1.3 nested inside the patch outer shell 1.2. The patch outer shell 1.2 has a connecting hole that communicates with the buffer cavity 4. The gap space between the patch outer shell 1.2 and the patch inner shell 1.3 is connected to the buffer cavity 4 through this connecting hole. The patch outer shell 1.2 and the patch inner shell 1.3 do not contact each other, and there is a certain gap space between them, which is filled with a first electrolytic component 1.4. The internal space of the patch inner shell 1.3 is filled with a second electrolytic component 1.5. The patch inner shell 1.3 is a plastic film, while the patch outer shell 1.2 is made of transparent plastic. Under the squeezing force generated when the pipeline flange 12 is tightened, the patch inner shell 1.3 will break, thereby causing the second electrolytic component 1.5 to mix with the first electrolytic component 1.4 to form an electrolyte solution 1.7. The electrolyte solution enters the buffer cavity 4 through the connecting hole on the patch outer shell 1.2. In this embodiment, the inner shell 1.3 of the patch is a thin film, the first electrolytic component 1.4 is a diluent (such as distilled water), and the second electrolytic component 1.5 is an acidic electrolyte stock solution (such as sulfuric acid).

[0067] After all the first electrolytic component 1.4 and the second electrolytic component 1.5 inside the patch body 1 are completely and evenly mixed, the total liquid volume of the generated electrolyte solution is 1.5-2 times the volume of the buffer chamber.

[0068] In this embodiment, the patch housing 1.2 is made of transparent plastic, and the overall thickness of the patch body 1 needs to be controlled between 1mm and 3mm.

[0069] The patch body 1 can be designed as a ring-shaped structure with dimensions matching those of the flange gasket. Alternatively, the patch body 1 can be designed as a double-layered, arc-shaped structure. In this embodiment, the patch body 1 is a double-layered, arc-shaped structure.

[0070] Preferably, a separating membrane 1.1 is provided at the connection between the patch housing 1.2 and the buffer cavity 4. This separating membrane 1.1 isolates the buffer cavity 4 from the internal space of the patch housing 1.2. Under pressure, the generated electrolyte solution will break through the separating membrane 1.1 and enter the buffer cavity 4 to react chemically with the self-reacting electrical energy device 3. The separating membrane 1.1 is preferably a double-layered plastic film. This double-layered isolation and protection measure, consisting of the patch inner shell 1.3 and the separating membrane 1.1, effectively prevents damage during transportation or handling, thus ensuring normal use.

[0071] The decompression sensing component includes a decompression airbag 9 and an isolation airbag 10. The decompression airbag 9 is disposed on the outside of the first extended sheet 2, and the isolation airbag 10 is disposed inside the buffer cavity 4 and shares a wall with the decompression airbag 9 (a portion of the wall of the isolation airbag 10 can be heat-pressed into one piece with the wall of the decompression airbag 9). That is, the first extended sheet 2 is a sheet with a stepped thickness. The internal cavity of the thicker part is the buffer cavity 4, and the internal cavity of the thinner part is the reaction cavity 5. The outer surface of this part of the sheet is provided with the isolation airbag 10. The end of the isolation airbag 10 shares a wall with the decompression airbag 9 located in the buffer cavity 4. The material thickness at the shared wall is much smaller than the material thickness at other locations of the first extended sheet 2. The material thickness of the decompression airbag 9 is the same as the thickness of the shared wall.

[0072] Both the decompression airbag 9 and the isolation airbag 10 are filled with air. During the two stages of "temporary blind flange not installed between the two connecting pipelines" and "temporary blind flange installed between the two connecting pipelines and flange tightening", the isolation airbag 10 is in the expanded sealing position to separate the buffer chamber 4 and the reaction chamber 5, so as to prevent the electrolyte solution in the buffer chamber 4 from entering the reaction chamber 5;

[0073] During the pipeline tightness test (including two test stages: pipeline tightness test and pressure holding test), compressed air needs to be introduced into the pipeline for the tightness test, so the internal pressure of the pipeline increases. Under the action of tightness pressure, the air inside the decompression airbag 9 breaks the common bladder wall and some of the air enters the isolation airbag 10. The isolation airbag 10 continues to be in the expansion and sealing position to separate the buffer chamber 4 and the reaction chamber 5, and continues to prevent the electrolyte solution in the buffer chamber 4 from entering the reaction chamber 5. As the tightness pressure gradually increases, the decompression airbag 9 is squeezed and its bladder membrane adheres to the surface of the first extension sheet 2 under the action of tightness pressure to ensure that the air inside the decompression airbag does not leak.

[0074] After the pipeline tightness test is completed, the tightness pressure inside the pipeline disappears. Under the action of external pressure release and the flow pressure of electrolyte solution in buffer chamber 4, the isolation airbag 10 contracts and becomes smaller. Buffer chamber 4 and reaction chamber 5 are connected. Electrolyte solution in buffer chamber 4 enters reaction chamber 5. Self-reacting electrical energy device 6 in reaction chamber 5 spontaneously reacts with electrolyte solution to generate current, which powers alarm device 7.

[0075] The self-reactive electrical energy device 6 includes two vertically opposed spacer plates 6.1 and an electrolytic shell 6.2 disposed between the two spacer plates 6.1. An electrolytic assembly is disposed inside the electrolytic shell 6.2. The two ends of the electrolytic assembly extend out of the two spacer plates 6.1 respectively and are connected to an external alarm device 7 via wires. The electrolytic shell 6.2 has multiple flow holes 6.7 for allowing electrolyte solution to flow into the interior of the electrolytic shell 6.2.

[0076] The electrolysis assembly includes a first metal substrate 6.3 and a second metal substrate 6.4. The first metal substrate 6.3 is fixed inside the upper spacer plate, and its end extends upward beyond the spacer plate and is connected to the wire 5. The second metal substrate 6.4 is fixed inside the lower spacer plate, and its end extends downward beyond the spacer plate and is also connected to the wire 5.

[0077] The aforementioned electrolysis component can be manufactured by injection molding as a whole. After manufacturing, it is assembled with the spacer plate 6.1 and the electrolysis shell 6.2 to form a self-reactive power device 6, and then encapsulated in the first extension sheet 2; or the self-reactive power device can also be manufactured by injection molding as a whole and then encapsulated in the first extension sheet 2.

[0078] The patch body 1 and the first extension patch 2 can be integrally injection molded and then assembled with the second extension patch 3.

[0079] The patch body 1, the first extension patch 2, and the second extension patch 3 mentioned above can also be integrally injection molded.

[0080] The alarm device 7 is located inside the second extension plate 3. The alarm device 7 is an audible and visual alarm.

[0081] The temporary blind flange and the blind flange patch of this application can be manufactured separately or together. Alternatively, a temporary blind flange with a built-in blind flange patch can be manufactured directly, or the temporary blind flange and the blind flange patch of this application can be manufactured separately, and then the blind flange patch can be fixed to the temporary blind flange by adhesive or other means. If the blind flange patch is fixed to the temporary blind flange by adhesive, double-sided tape (including anti-adhesive film) can be applied to the blind flange patch. The double-sided tape can be pre-applied to the patch at the factory (i.e., applied during the production of the blind flange patch), or it can be applied to the blind flange patch on-site during actual use.

[0082] When a leak test is required on a marine segmented piping system, first attach a blind flange patch to the marine temporary blind flange. The patch body 1 should be attached to the temporary blind flange and correspond to the position of the piping gasket. The second extension 2 should be attached to the center of the temporary blind flange, and the third extension 3 should be suspended outside the temporary blind flange. Then, install the temporary blind flange with the patch attached between two opposing piping flanges 12; or directly install a temporary blind flange with a patch attached between two opposing piping flanges 12.

[0083] Then, tighten the flange bolts. During the tightening process, under the pressure of the pipeline flange 12, the second electrolytic component 1.5 in the patch body 1 breaks through its patch inner shell 1.3 and mixes with the first electrolytic component 1.4 to form an electrolyte solution. As the pressure continues, the electrolyte solution will break through the isolation membrane 1.6 and enter the buffer chamber 4. However, at this time, due to the obstruction of the pressure reduction sensing component, the electrolyte solution will not enter the reaction chamber 5.

[0084] During the pipeline tightness test (including two test stages: pipeline tightness test and pressure holding test), the electrolyte solution continues to be contained in the buffer chamber 4.

[0085] After the pipeline tightness test is completed, the tightness pressure inside the pipeline disappears. Under the action of external pressure release and the flow pressure of electrolyte solution in buffer chamber 4, the blocking effect of pressure reduction sensing component "fails". The electrolyte solution in buffer chamber 4 flows into reaction chamber 5. The electrolyte solution flows in from the flow hole 6.7 of self-reactive power device 6 and reacts with the two metal substrates to generate current through oxidation-reduction reaction. Alarm device 6 starts to sound and light alarm.

[0086] In this embodiment, the alarm device will be activated to sound an alarm after the pipeline tightness test is completed.

[0087] Example 2: The blind plate patch in this example is basically the same as that in Example 1, except that...

[0088] The self-reactive electrical energy device 6 includes two vertically opposed spacer plates 6.1 and an electrolytic shell 6.2 disposed between the two spacer plates 6.1. An electrolytic assembly is disposed inside the electrolytic shell 6.2. The two ends of the electrolytic assembly extend out of the two spacer plates 6.1 respectively and are connected to an external alarm device 7 via wires. The electrolytic shell 6.2 has multiple flow holes 6.7 for allowing electrolyte solution to flow into the interior of the electrolytic shell 6.2.

[0089] The electrolysis assembly includes a first metal substrate 6.3, a second metal substrate 6.4, and a metal foil 3.5. The first metal substrate 6.3 is fixed inside the upper spacer plate, with its end extending upwards beyond the spacer plate and connected to the wire 5. The second metal substrate 6.4 is fixed inside the lower spacer plate, with its end extending downwards beyond the spacer plate and also connected to the wire 5. The metal foil 6.5 is vertically arranged, with one end directly physically connected to the first metal substrate 6.3 and the other end directly physically connected to the second metal substrate 6.4. The material of the metal foil 6.5 is different from that of the first metal substrate 6.3 and the second metal substrate 6.4, and it is the most reactive. The thickness of the metal foil 6.5 is much smaller than the thickness of the first metal substrate 6.3 and the second metal substrate 6.4.

[0090] Assuming the first metal substrate 6.3 is the anode and the second metal substrate 6.4 is the cathode, the metal foil 6.5 is more reactive than the first metal substrate 6.3, and the first metal substrate 6.3 is more reactive than the second metal substrate 6.4 (for example, the first metal substrate is a zinc plate, the second metal substrate is a copper plate, and the metal foil is magnesium). When the electrolyte solution flows into the electrolytic shell 6.2 through the flow hole 6.7, the metal foil 6.5 first undergoes an oxidation reaction. Since the metal foil 6.5 is in direct physical contact with the first metal substrate 6.3 and the second metal substrate 6.4, an internal short circuit is formed between the first metal substrate 6.3 and the second metal substrate 6.4. The electron flow that should have passed through the external circuit will flow directly from the first metal substrate 6.3 to the second metal substrate 6.4 through the metal foil 6.5. Therefore, the actual output voltage of the self-reaction power device 6 is close to 0, and the alarm device 7 will not be activated and will not sound an alarm. However, when the metal foil 6.5 is completely consumed, the first metal substrate 6.3 becomes the anode again and continues to provide electrons to the external circuit, while the second metal substrate 6.4 remains the cathode, accepting these electrons and undergoing a reduction reaction. The actual output voltage of the self-reaction power device 6 becomes the value determined by the standard electrode potential difference between the first metal substrate 6.3 and the second metal substrate 6.4, and the alarm device 7 is activated to sound an alarm.

[0091] Therefore, the self-reactive electrical energy device 6 will carry out two stages of chemical reaction. The first stage of chemical reaction is the consumption of metal foil 6.5, and its consumption time is not less than the total operation time of the marine temporary blind flange installation and pipeline tightness test. The second stage of chemical reaction is the consumption of the first metal substrate 6.3.

[0092] By controlling the consumption time of the metal foil 6.5, the delay start time of the alarm device 7 can be controlled. For example, by opening an adjustment hole 6.6 through the foil body in the center of the metal foil 6.5, the consumption rate of the metal foil 6.5 can be accelerated, thereby reducing the delay start time of the alarm device 7.

[0093] Furthermore, the delay start time of the alarm device 7 can be further adjusted by adjusting the diameter of the adjusting hole 6.6. Of course, other methods can also be used to control the delay start time of the alarm device 7.

[0094] When a leak test is required on a marine segmented piping system, first attach a blind flange patch to the marine temporary blind flange. The patch body 1 should be attached to the temporary blind flange and correspond to the position of the piping gasket. The second extension 2 should be attached to the center of the temporary blind flange, and the third extension 3 should be suspended outside the temporary blind flange. Then, install the temporary blind flange with the patch attached between two opposing piping flanges 12; or directly install a temporary blind flange with a patch attached between two opposing piping flanges 12.

[0095] Then, tighten the flange bolts. During the tightening process, under the pressure of the pipeline flange 12, the second electrolytic component 1.5 in the patch body 1 breaks through its patch inner shell 1.3 and mixes with the first electrolytic component 1.4 to form an electrolyte solution. As the pressure continues, the electrolyte solution will break through the isolation membrane 1.6 and enter the buffer chamber 4. However, at this time, due to the obstruction of the pressure reduction sensing component, the electrolyte solution will not enter the reaction chamber 5.

[0096] During the pipeline tightness test (including two test stages: pipeline tightness test and pressure holding test), the electrolyte solution continues to be contained in the buffer chamber 4.

[0097] After the pipeline tightness test is completed, the tightness pressure inside the pipeline disappears. Under the action of external pressure release and the flow pressure of electrolyte solution in buffer chamber 4, the blocking effect of pressure reduction sensing component "fails". The electrolyte solution in buffer chamber 4 flows into reaction chamber 5. The electrolyte solution flows into self-reacting power device 6 through the flow hole 6.7. In the first stage chemical reaction where metal foil 6.5 is the anode, alarm device 7 does not start. In the second stage chemical reaction where metal foil 6.5 is consumed and the first metal substrate 6.3 becomes the anode, alarm device 7 starts to provide audible and visual alarm.

[0098] Therefore, in this embodiment, the alarm device 7 will only activate the audible and visual alarm some time after the pipeline tightness test is completed. For example, the alarm device 7 will start 12 hours, 24 hours, or 36 hours after the pipeline tightness test is completed. The time interval between the alarm device 7 and the end of the pipeline tightness test depends on the consumption time of the metal foil 6.5. The consumption rate of the metal foil 6.5 can be accelerated by increasing the aperture of the adjusting hole 6.6, so as to shorten the delay time of the alarm device 7.

[0099] Other implementation methods are the same as in Example 1, and will not be described in detail here.

[0100] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A temporary blind flange for decompression starting on a ship, characterized in that, Includes a blind flange (11.1), a blind flange handle (11.2) extending from any position in the circumference of the blind flange (11.1), and a blind flange patch. The blind flange (7) has multiple bolt holes in the circumferential direction that correspond to the flange holes of the pipeline flange. The blind flange patch includes a patch body (1), a first extension piece (2) and a second extension piece (3) extending from any position on the patch body (1) in two opposite directions, wherein the first extension piece (2) extends toward the center of the blind flange, the patch body (1) and the first extension piece (2) are attached to the blind flange flange (11.1), and the second extension piece (3) is attached to the blind flange handle (11.2); The patch body (1) is internally encapsulated with an electrolyte solution, and the electrolyte solution can enter the buffer chamber (4) under the squeezing force generated when the pipeline flange 12 is tightened. The first extension sheet (2) has an internal hollow structure and a buffer cavity (4) is formed at one end near the patch body (1) and a reaction cavity (5) is formed at the other end. A self-reactive power device (6) is provided in the reaction cavity (5). An alarm device (7) is provided in the second extension sheet (3). The alarm device (7) is connected to the self-reactive power device (6) through a wire (8). The first extension plate (2) is also provided with a pressure reduction sensing component. The pressure reduction sensing component is used to block the buffer chamber (4) and the reaction chamber (5) in stages according to the test progress of the ship pipeline tightness test so that the electrolyte solution can flow from the buffer chamber (4) into the reaction chamber (5) after the tightness test is completed.

2. The temporary blind flange for decompression starting of a ship according to claim 1, characterized in that, The patch body (1) has a double-layer structure, including a patch outer shell (1.2), a patch inner shell (1.3) nested inside the patch outer shell (1.2), a first electrolytic component (1.4) disposed in the space between the patch outer shell (1.2) and the patch inner shell (1.3), and a second electrolytic component (1.5) disposed in the internal space of the patch inner shell (1.3). The patch inner shell (1.3) is ruptured under the squeezing force generated when the pipeline flange 12 is tightened, causing the second electrolytic component (1.5) to mix with the first electrolytic component (1.4) to form an electrolyte solution.

3. The temporary blind flange for decompression starting of a ship according to claim 1, characterized in that, An isolation membrane (1.1) is also provided at the connection between the patch body (1) and the buffer cavity (4) of the first extension patch body (2).

4. The temporary blind flange for decompression starting of a ship according to claim 1, 2, or 3, characterized in that, The patch body (1) is circular or arc-shaped.

5. The temporary blind flange for decompression starting of a ship according to claim 1, characterized in that, The decompression sensing component includes a decompression airbag (9) and an isolation airbag (10). The decompression airbag (9) is located on the outside of the first extension plate (2). The isolation airbag (10) is located inside the buffer cavity (4) and shares the same bladder wall with the decompression airbag (9). In the initial state and during the pipeline tightness test, the isolation airbag (10) is in the expanded sealing position to separate the buffer cavity (4) and the reaction cavity (5). After the pipeline tightness test, the isolation airbag (10) is in the contracted open position to connect the buffer cavity (4) and the reaction cavity (5).

6. The temporary blind flange for decompression starting of a ship according to claim 1, characterized in that, The self-reactive power device (6) includes two vertically opposed spacer plates (6.1) fixed on the reaction chamber (5) and an electrolytic shell (6.2) disposed between the two spacer plates (6.1). An electrolytic assembly is disposed inside the electrolytic shell (6.2). The two ends of the electrolytic assembly extend out of the two spacer plates (6.1) and are connected to the alarm device (7) through wires. The electrolytic shell (6.2) is provided with a plurality of flow holes (6.7) for allowing the electrolyte solution to flow into the electrolytic shell (6.2).

7. The temporary blind flange for decompression starting of a ship according to claim 1, characterized in that, The electrolysis assembly includes a first metal substrate (6.3) and a second metal substrate (6.4). The first metal substrate (6.3) is fixed inside the upper spacer plate. The end of the first metal substrate (6.3) extends out of the reaction chamber (5) and is connected to the wire (8). The second metal substrate (6.4) is fixed inside the lower spacer plate. The end of the second metal substrate (6.4) extends out of the reaction chamber (5) and is also connected to the wire (8).

8. The temporary blind flange for decompression starting of a ship according to claim 1, characterized in that, The electrolysis assembly also includes a metal foil (6.5), one end of which is physically connected to the first metal substrate (6.3) and the other end is physically connected to the second metal substrate (6.4). The metal foil (6.5) is made of a different material than the first metal substrate (6.3) and the second metal substrate (6.4) and is the most reactive.

9. The temporary blind flange for decompression starting of a ship according to claim 8, characterized in that, The metal foil (6.5) also has an adjustment punch (6.6) that penetrates the foil body in the center. The adjustment punch (6.6) is used to adjust the delay start time of the control alarm device (7).

10. The temporary blind flange for decompression starting of a ship according to claim 1, characterized in that, The alarm device (7) includes an audible and visual alarm.

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