Pipeline connection protection device

Abstract

A pipeline connection protection device comprises a body with a shell, the shell is provided with a first connection port, a second connection port opposite to the first connection port and a channel communicating the first connection port and the second connection port, and a pipeline of a pipeline system penetrates through one of the first connection port and the second connection port to enter the channel. The other one is used for enabling the pipeline to extend out of the channel or be connected to a pipeline joint; the device further includes a display and a collection chamber disposed in the body and in fluid communication with the channel for collecting the liquid in the channel, the display mounted at the housing and in fluid communication with the collection chamber and configured to display a condition of the liquid in the collection chamber. According to the device, the liquid leakage condition of the coated pipeline or the connecting part of the pipeline and the joint is visualized, the leaked liquid can be collected, and the safety of equipment and a structure is ensured. The invention further provides a pipeline system with the pipeline connection protection device and a civil aircraft with the pipeline connection protection device.

Description

Technical Field

[0001] The invention relates to a pipeline connection protection device for a pipeline system, in particular to a pipeline connection protection device for an aviation pipeline system. Background Art

[0002] In various types of piping systems, for example, in aviation piping systems carried by civil aircraft, leakage incidents may occur in the piping system. It is very important for the normal operation of civil aircraft to promptly discover the location of the leakage incident and deal with the leakage and the leakage site.

[0003] For example, if the pipe joint of the hydraulic pipeline on the aircraft is broken due to wear at the crimping point, it will cause leakage. At this time, the hydraulic oil leaking from the hydraulic pipeline will drip and cause the electrical equipment under the pipe joint to be contaminated, resulting in safety hazards. Generally, the inspection process for leakage incidents in the pipeline system is cumbersome and time-consuming. This will cause the aircraft with the pipeline system where the leakage incident occurred to be unable to be put into operation for a long time. This will cause direct economic losses to the airline.

[0004] At present, the following solutions have been proposed to check whether the fluid transmission pipeline on the detection machine has leaks:

[0005] A pipe joint cover for a pipe leak detection system is known from US 8967185 B2 (publication date: March 3, 2015). The first part of the pipe joint cover has a manifold and is fixed to a circumferential cutout of a pipe insulation, or to a pipe joint connecting a pipe portion, thereby forming a reservoir for hot air that has leaked from the pipe or pipe joint, and a pipe connected to the hot air reservoir is also defined in the manifold. The second part of the cover is used to fix the thermistor to the manifold at the end of the pipe so that the hot air from the hot air reservoir can directly hit the thermistor. The main body of the manifold also includes a flow control mechanism for preventing a false alarm caused by a nominal leak caused by the normal operation of the pipe system. The pipe joint cover is mainly used to detect whether a gas leak occurs in an insulated pipe carrying pressurized hot air and issue an alarm message, but is not suitable for a pipeline system for transporting liquids.

[0006] In addition, for onboard pipelines that may leak, containers can be provided to collect the leaked liquid, for example:

[0007] A clamp pipe joint for connecting multiple pipes together is known from GB 2576245 A (publication date: February 12, 2020). In the clamp pipe joint, the leaked liquid can be received in the receiving area formed between the inner pipe and the outer pipe. In addition, the steam can also be received between the areas formed between the inner pipe and the outer pipe. However, although the clamp pipe joint can collect and capture the leaked liquid, it is not provided with a direct discharge device. This makes it impossible to discharge the leaked liquid and steam received in the above-mentioned area without disassembling the clamp, and the clamp pipe joint cannot realize the visual observation of how much space is left in the above-mentioned receiving area for accommodating liquid and steam. This results in the use of the clamp pipe joint. It is also necessary to disassemble it before it can be seen whether the leaked liquid is collected in the receiving area and how much leaked liquid is collected. Therefore, the clamp pipe joint cannot provide the maintenance personnel with a reminder of the leakage of the onboard pipeline system, and it is more cumbersome to use the clamp pipe joint and discharge the collected leaked liquid from it.

[0008] A pipeline joint leakage protection device is known from CN 209146580 U (publication date: July 23, 2019). The protection device includes: a protective cover and a guide tube of an open structure, wherein the protective cover is made of a visual material and includes a water supply pipe interface, a guide tube interface and an opening. The opening is constructed as an interactive opening, consisting of an upper half and a lower half that are interactively overlapped at the interface. One end of the guide tube is connected to the guide tube interface, and the other end is connected to the drain port on the machine so that the leaked liquid can be discharged to the drain port. The protection device collects and discharges the leaked liquid of the pipeline joint by wrapping an open, interactive and visual confluence protection device with liquid collection and discharge functions on the pipeline joint, thereby preventing the leaked liquid from dripping onto the electrical equipment located below the pipeline, thereby protecting these electrical equipment. The protection device is only applicable to leakage occurring at the pipeline joint in the pipeline system and cannot be applied to the connection between the pipeline joint and the pipeline. In addition, the protective device needs to be structurally coordinated with a specific water supply pipe and a specific discharge pipe, the manufacturing cost is relatively high, and only the protective cover is made of visible materials, which results in the overall structural visibility of the entire protective device is still poor, although maintenance personnel can observe leakage.

[0009] A connecting device for an aircraft fuel conduit is also known from CN 204829100 U (publication date: December 2, 2015). The connecting device is used in the case where fuel leaks at the connection of the aircraft's fuel conduit. The connecting device includes: a collecting device, which is used to connect the first conduit and the second conduit, and is used to collect the fuel leaked at the pipe joint of the first conduit and the second conduit; a drain valve, which is connected to the oil leakage nozzle of the collecting device through a drain pipeline. The connecting device can collect the fuel leaked at the connection of the fuel conduit during use, and prevent the fuel from leaking into or outside the fuselage through the drain valve, thereby ensuring the safety of aircraft use and flight. In addition, when the aircraft is undergoing ground maintenance before flight, in the connecting device, by opening the drain valve to discharge the fuel and checking whether there is oil at the outlet of the drain valve, the maintenance personnel can determine whether there is oil leakage at the fuel conduit connection, and can promptly eliminate the relevant faults when oil leakage is found. However, the connecting device cannot be directly installed on the existing pipeline structure, but must replace the existing pipeline joints in the pipeline system as a whole before it can be used as a connecting device to connect the two ends of the pipeline.

[0010] A leakage oil collection device for a flexible pipe joint for a flexible connection of an aircraft fuel pipe is also known from CN 102102785 A (publication date: June 22, 2011). The collection device comprises a left support sleeve, a spring retaining ring, a connecting sleeve, a sealing ring, an oil leakage nozzle, a clamp and a right support sleeve, wherein one end of the left support sleeve and one end of the right support sleeve are respectively welded to the aircraft fuel pipes at the left and right ends of the flexible pipe joint, and the other end of the left support sleeve is provided with a retaining end, and one end of the right support sleeve is respectively welded to the aircraft fuel pipes at the left and right ends of the flexible pipe joint, the other end of the left support sleeve is provided with a retaining platform, and a sealing groove is provided on the retaining platform, and a right flange for installing the clamp is provided on the outer side of the sealing groove; one end of the connecting sleeve is provided with a retaining groove for installing the spring retaining ring, and the other end is provided with a left flange for installing the clamp, the connecting sleeve is installed on the left and right support sleeves through the clamp and the spring retaining ring, and the leakage oil nozzle is welded on the connecting sleeve. The oil leakage collection device is suitable for the flexible pipe system on the aircraft, and the flexible hoses need to be welded and connected at both ends, which is relatively complicated to operate.

[0011] It can be seen that the solutions currently proposed in the art for realizing the anti-leakage function of the pipeline system and collecting the leaked liquid from the pipeline system in the event of leakage of the pipeline system are mainly divided into the following two categories.

[0012] The first type of solution is mainly for the pipeline section that has leaked in the pipeline system. In the first type of solution, a barrier device is wrapped around the pipeline section that has leaked. A conduit is arranged to lead out from the barrier device, and the liquid leaking from the pipeline section is discharged into an external collection container by means of the conduit.

[0013] Devices using the first type of solution usually have a heavy structure, and they also need to be equipped with additional larger collection containers for collecting leaked liquid. However, when such a device is used on the piping system on an aircraft, there may not be enough area near the location where the device is installed to set up such a larger leakage collection container. This limits the use scenarios of this type of solution. In addition, this type of solution itself does not further process the pipeline section where the leak has occurred, but only collects and discharges the leaked liquid, and cannot provide leakage prompts to maintenance personnel or onboard personnel.

[0014] The second type of solution is mainly aimed at pipe joints in the pipeline system that are prone to leakage. In the second type of solution, a special pipe joint with a catheter is used instead of an ordinary pipe joint. The pipes at both ends of the pipe joint are connected by welding through a special pipe joint to prevent leakage as much as possible. After the leakage occurs, the special pipe joint uses the catheter to collect the leaked liquid.

[0015] The structure of the above solution is only applicable to flexible pipe systems, and the pipe joints need to be specially made and welded to the flexible hoses at both ends, so the installation operation is relatively complicated.

[0016] In addition, the inventors have also noticed that the above two types of solutions are not applicable to the situation where the leakage location in the pipeline system is the connection between the pipeline and the pipe joint.

[0017] Therefore, the art still hopes to propose a new pipeline connection structure, which can effectively prevent leakage, collect leakage in the event of leakage, and be adaptable to various types of pipeline systems as much as possible, especially suitable for application scenarios where the space around the onboard pipeline system is narrow and compact. Summary of the invention

[0018] Based on the above objectives, the present invention proposes a pipeline connection protection device, which is used to cover the pipeline or the connection between the pipeline and the pipeline joint in the pipeline system, especially in the onboard pipeline system of a civil aircraft, so as to collect the leaked liquid in the event of leakage and make the leakage situation visible to the maintenance personnel.

[0019] The pipeline connection protection device according to the present invention comprises a main body, the main body has a shell, the shell has a first connection port and a second connection port arranged at two ends thereof, and a channel connecting the first connection port and the second connection port, and the pipeline connection protection device also comprises a display and a collection chamber, wherein one of the first connection port and the second connection port is used for the pipeline liquid in the pipeline system to pass through the first port to enter the channel in a sealed manner, and the other of the first port and the second connection port can be used for the pipeline liquid to extend out of the channel and leave the main body in a sealed manner, or the pipeline is connected to a pipeline joint in the pipeline system in a sealed manner.

[0020] The collection chamber is arranged in the body and is in fluid communication with the channel so as to collect liquid from the channel. When a pipe in the pipeline system extending through the channel leaks, the leaked liquid from the leaking part will accumulate in the channel and flow into the collection chamber.

[0021] The display member is mounted at the housing of the body, is in fluid communication with the collection chamber, and is configured to display the volume of the fluid in the collection chamber.

[0022] Thus, with the help of the pipeline connection protection device according to the present invention, a pipeline in the pipeline system or the connection between a pipeline in the pipeline system and a pipeline joint can be covered, so that a pipeline in the pipeline system enters the body from the first port in a liquid-tight manner and passes through the channel to leave the body or is connected to the pipeline joint at the second port of the shell in a liquid-tight manner.

[0023] Here, once a leakage occurs in the corresponding part of the pipeline system to which the pipeline connection protection device according to the present invention is applied, that is, a leakage occurs in the middle section of the pipeline or at the connection between the pipeline and the pipeline joint, the leaked liquid will accumulate in the channel through which the pipeline passes, and due to the setting of the liquid seal at the first port and the second port, it is forced to flow into a collection chamber connected to the channel fluid, thereby avoiding the situation in which, in the event of a leakage in the pipeline of the pipeline system provided with the pipeline connection protection device or between the pipeline and the pipeline joint, the leaked liquid drips onto the electrical equipment or structure located below the pipeline connection protection device, causing pollution to the environment, and even further endangering the operating safety of the equipment or structure.

[0024] Furthermore, the pipeline connection protection device according to the present invention is also provided with a display element connected to the fluid of the collection chamber, so that maintenance personnel can easily observe and determine whether a connection part or pipeline of the pipeline system coated with the pipeline connection protection device according to the present invention is leaking; if a leakage occurs, the maintenance personnel can further know the volume of the liquid that has leaked through the visual information displayed by the display element, thereby speeding up the maintenance personnel or other on-site personnel to discover the leakage part of the pipeline system and deal with the leakage incident as soon as possible.

[0025] In a non-limiting embodiment of the present invention, the display member is at least partially made of a transparent material. Preferably, the outermost portion of the display member is made of a transparent material. The transparent material is, for example, glass. Alternatively, the display member may also be at least partially made of a translucent material. Preferably, the outermost portion of the display member is made of a translucent material. The translucent material is, for example, a specially treated metal. Thus, by selecting a suitable material to construct at least a portion of the display member, in particular the outermost portion of the display member, the maintenance personnel or other personnel on site can easily visually observe the pipeline leakage state and leakage amount displayed by the display member, and the structure is relatively simple and low in cost.

[0026] In a non-limiting embodiment of the present invention, the display element is configured to have a capillary tube disposed therein, wherein a volume is formed inside the capillary tube, and the volume is in fluid communication with the collection chamber.

[0027] By way of example and not limitation, the capillary is configured to have a diameter of 1 mm.

[0028] Therefore, in the pipeline connection protection device according to the present invention, the display element can use the pressure difference principle through the capillary constructed inside the display element, specifically through the liquid contained in the internal volume of the capillary combined with the selection of transparent or translucent materials on its external part, to show maintenance personnel or other on-site personnel whether the pipeline system is leaking and the amount of leakage.

[0029] In particular, maintenance personnel can judge whether the pipeline system needs to be repaired immediately or whether the leakage event can be temporarily retained based on the display element, especially the liquid level in the capillary tube.

[0030] Further, in the pipeline connection protection device according to the present invention, a hole is provided on the outer circumferential surface of the shell of the main body. The hole is configured as a through hole and is arranged to be in fluid communication with the above-mentioned collection chamber. The display element of the pipeline connection protection device is inserted through the hole, thereby being mounted on the main body of the device and can be in fluid communication with the collection chamber, so that the leaked liquid collected in the collection chamber can flow into the inner volume of the display element.

[0031] Thus, a detachable connection between the display element and the body of the device is achieved by means of the hole. When it is necessary to inspect the pipeline system to which the pipeline connection protection device according to the present invention is applied, for example, due to leakage, or when the leaked liquid accumulated in the collection chamber of the body is about to fill the collection chamber so that the leaked liquid cannot be further collected, the maintenance personnel or other personnel on site only need to remove the display element from the above-mentioned through hole so that the through hole is no longer blocked, and the fluid accumulated in the collection chamber can be discharged to the outside of the body through the through hole. Therefore, by means of the pipeline connection protection device according to the present invention, if the pipeline covered by the connection protection device or the connection part between the pipeline and the pipeline joint leaks, the maintenance personnel or other personnel on site can not only easily notice the occurrence of the leakage event, but also collect the leakage of the pipeline system, and the collected leakage can be easily discharged from the device body to the outside without providing an additional structure to the body, so that the overall structure of the pipeline connection protection device according to the present invention is simple and the manufacturing cost is relatively low.

[0032] Preferably, in the pipeline connection protection device according to the present invention, a liquid-tight connection is also achieved between the display component and the main body, so that the liquid in the main body cannot be discharged from the shell when the display component is not removed from the through hole, thereby improving the reliability of the pipeline connection protection device according to the present invention and avoiding the following situation: once a leakage occurs in the pipeline system and the amount of leaked liquid is large, the liquid collected in the collection chamber of the shell will overflow through the provided through hole and then drip under the main body, affecting the operation of the electrical equipment, or affecting the structural safety, or polluting the environment.

[0033] Optionally, the through hole is configured as a threaded hole, and the indicator is configured to have an extension portion, with threads correspondingly arranged outside the extension portion, so that the indicator can be detachably connected to the shell of the main body of the pipeline connection protection device through the threaded connection between the through hole.

[0034] Alternatively or additionally, the shell of the main body of the pipeline connection protection device according to the present invention is constructed by a first shell half and a second shell half. The half-shell structure makes it easier to install and wrap the pipeline connection protection device according to the present invention in a pipeline system, especially wrap it on the middle section of the pipeline, or wrap it on the connection position between the pipeline and the pipeline joint.

[0035] Preferably, the first shell half is provided with at least one protrusion at at least one radial end face, and the second shell half is provided with at least one recess at at least one radial end face. The radial end face of the first shell half provided with the at least one protrusion is opposite to the radial end face of the second shell half provided with the at least one recess. When the first shell half and the second shell half are wrapped around the pipe or the connection between the pipe and the pipe joint, the first shell half and the second shell half are joined to each other by means of the shape-fitting connection of the at least one protrusion and the at least one recess.

[0036] Therefore, the pipeline connection protection device according to the present invention can be easily covered on the outside of the existing pipeline system, especially on the outside of the parts prone to leakage, through the half-shell splicing structure, without the need for additional modification of the design of the existing pipeline or pipeline joint.

[0037] Furthermore, the mortise and tenon structure of the protruding portion and the recessed portion makes it easier for installers or maintenance personnel to assemble the first shell half and the second shell half, and provides positioning guidance for the first shell half and the second shell half.

[0038] In a preferred embodiment of the present invention, two protrusions are provided at the first radial end surface of the first shell half, and two recesses are provided at the second radial end surface of the first shell half. Two recesses are provided at the first radial end surface of the second shell half, and two protrusions are provided at the second radial end surface of the second shell half. Through the arrangement of the above four protrusions and four recesses, when the first shell half and the second shell half are assembled, the two protrusions provided at the first radial end surface of the first shell half are inserted into the two recesses provided at the first radial end surface of the second shell half, and the two protrusions provided at the second radial end surface of the second shell half are inserted into the two recesses provided at the second radial end surface of the first shell half, so that the first radial end surface of the first shell half is in contact with the first radial end surface of the second shell half, and the second radial end surface of the first shell half is in contact with the second radial end surface of the second shell half.

[0039] By respectively arranging pairs of protrusions and recesses at the two radial end faces of the two shell halves, better positioning guidance is provided for the engagement between the first shell half and the second shell half, and a fool-proof setting is also achieved, so that the first shell half and the second shell half can be more firmly spliced ​​to each other.

[0040] Optionally, in the pipeline connection protection device according to the present invention, a gasket is also inserted between the first shell half and the second shell half, which is used to enhance the liquid sealing at the joint of the two shells after the first shell half and the second shell half are joined, thereby improving the reliability of the pipeline connection protection device according to the present invention in use.

[0041] Preferably, the gasket is customized by the user, and its design and construction are adapted to the shape of the joint portion of the first shell half and the second shell half. For example, the gasket can be constructed to have an opening therein for the protrusion located at the radial end surface of the first shell half or the second shell half to extend through, so as to further enhance the liquid sealing at the joint after the first shell half and the second shell half are joined, especially at the joint of the first shell half and the second shell half, through better conformity at the joint of the first shell half and the second shell half.

[0042] Further preferably, the first shell half and the second shell half are fastened to each other by a buckle portion.

[0043] Specifically, in the first shell half, a first buckle section is provided on the outer circumferential surface, near the radial end surface of the first shell half, that is, near the seam of the first shell half and the second shell half after they are joined, and in the second shell half, a second buckle section is provided on the outer circumferential surface, near the radial end surface of the second shell half, that is, near the seam of the first shell half and the second shell half after they are joined. The first shell half and the second shell half are fastened to each other by means of the engagement of the first buckle section and the second buckle section. Thus, the first shell half and the second shell half can be tightly connected together by means of the buckle section to prevent the first shell half from being detached from the second shell half due to events such as air turbulence during the flight of the aircraft, thereby enhancing the reliability of the pipeline connection protection device according to the present invention.

[0044] In a non-limiting embodiment of the present invention, the above-mentioned passage connecting the first connection port and the second connection port is formed by the internal hollow chamber of the first shell half and the second shell half of the shell of the body of the pipeline connection protection device according to the present invention. In other words, the shape design of the first shell half and the second pipeline half is configured to form a hollow chamber inside after they are joined to each other, and the pipeline from the pipeline system can extend through the chamber from one connection port to the other connection port, and connect to the pipeline joint at the other connection port or extend out of the device from the other connection port.

[0045] In a non-limiting embodiment of the present invention, a circumferential groove is provided on the inner circumferential surface of the shell of the body of the pipeline connection protection device according to the present invention. The circumferential groove forms the above-mentioned collection chamber. Thus, when a portion of the pipeline extending through the channel in the body leaks itself or leaks at the connection portion of the pipeline with the pipeline joint of the pipeline system, the liquid leaking from the leaking portion will first flow into the channel, and then accumulate in the circumferential groove due to the groove recessed below the inner circumferential surface of the shell. In other words, the leaked liquid is collected in the collection chamber.

[0046] Furthermore, through the display element in fluid communication with the collection chamber, it is possible to show maintenance personnel or other personnel on site that the connection part covered by the pipeline connection protection device is leaking, thereby realizing visualization of the leakage event.

[0047] Specifically, the circumferential groove can be formed by a first groove and a second groove respectively formed on the inner circumferential surface of the two shell halves of the shell of the body of the pipeline connection protection device. The first groove and the second groove are connected end to end, so that the first groove and the second groove are fluidically connected to each other, thereby forming an annular collection chamber on the inner surface of the shell of the body of the device. The collection chamber can collect and accumulate as much leaked liquid as possible before the internal volume is filled, so that when the maintenance personnel or maintenance personnel are unable to perform maintenance or discharge the leaked liquid in time, as much volume as possible is provided for the accumulation of the leaked liquid, so as to avoid the overflow and dripping of the leaked liquid affecting the normal operation of the electrical equipment and / or affecting the structural safety.

[0048] In a preferred embodiment of the present invention, the hole arranged on the circumferential surface of the shell of the main body of the pipeline connection protection device according to the present invention is arranged on the outer circumferential surface of the first shell half, so that the orientation of the through hole is almost orthogonal to the ground when the aircraft is in level flight or parked on the ground. Preferably, the hole is vertically open upward. The hole is in fluid communication with the first groove arranged on the inner circumferential surface of the first shell half, so that the display member, preferably the capillary tube of the display member, can be in fluid communication with the collection chamber including the first groove as long as it extends through the hole, thereby being able to display the leakage collection situation in the collection chamber to maintenance personnel or other users.

[0049] By providing the through hole as described above, the display element can also be oriented almost vertically when installed. This allows the maintenance personnel or users of the pipeline connection protection device to conveniently observe the liquid level display in the display element. In addition, the orientation of the opening also facilitates the installation of the display element through the hole and the removal of the display element from the hole, without the liquid in the collection chamber accidentally leaking during the process of removing the display element, thereby enhancing the safety of the pipeline connection protection device according to the present invention in terms of collecting leaked liquid.

[0050] In a non-limiting embodiment of the present invention, the pipeline connection protection device according to the present invention is liquid-tightly connected to the first pipe of the pipeline system at the first connection port by means of a first sealing gasket, and is liquid-tightly connected to the pipe joint of the pipeline system or the supply pipe extends from the second connection port by means of a second sealing gasket and at least one reducing ring.

[0051] Thus, the pipeline connection protection device according to the present invention can be used to cover a connection point between a pipeline and a pipeline connector in a pipeline system or to cover a middle section of a pipeline.

[0052] Alternatively or additionally, when necessary, a reducing ring may be provided at the first connection port in addition to the sealing gasket to better match the outer diameter of the pipe extending into the first connection port, thereby achieving liquid sealing at the first connection port.

[0053] In particular, at the first connection port, for example, when the body of the pipeline connection protection device has a variable diameter, at the port with a smaller diameter, it is liquid-tightly connected to the first pipe through a sealing gasket, and at the second connection port, for example, when the body of the pipeline connection protection device has a variable diameter, at the port with a larger diameter, it is liquid-tightly connected to the pipe joint in the pipeline system through a sealing gasket and at least one reducing ring to better fit.

[0054] Specifically, at the second connection port, the sealing gasket is located at the radially innermost part and cooperates with the pipe joint, and at least one reducing ring is used to achieve the cooperation between the inner diameter of the shell at the second end of the shell of the body of the pipeline connection protection device provided with the second connection port and the outer diameter of the sealing gasket. If necessary, two reducing rings can be used to achieve the transition of the above inner diameter, so as to meet the liquid-tight connection requirements and ensure the liquid tightness of the coating of the pipeline connection protection device according to the present invention.

[0055] Here, the first and second sealing gaskets and at least one reducing ring are all standard parts. Therefore, when installing the pipeline connection protection device according to the present invention, existing standard parts can be used to adapt to pipes with different diameters and pipe joints with different diameters in the pipeline system. This makes the pipeline connection protection device according to the present invention have strong adaptability and a wider range of application scenarios. In addition, the use of standard parts also avoids the manufacturing cost and use cost of the pipeline connection protection device according to the present invention itself from being significantly increased due to the need for special customization to adapt to different pipe diameters.

[0056] In a non-limiting embodiment of the present invention, the housing of the body of the pipeline connection protection device according to the present invention has a first section and a second section, the first section includes a second end provided with a second connection port, and the second section includes a first end provided with a first connection port. The first section has a radius greater than the second section.

[0057] Here, the pipeline connection protection device according to the present invention has a first connection port and a second connection port with different diameters, so that the pipeline connection protection device according to the present invention can have greater flexibility to adapt to pipes and pipe joints with different diameters, and can reasonably select the size and quantity of the sealing gasket and reducer ring used.

[0058] Therefore, the present invention proposes a pipeline connection protection device for a pipeline system, which can collect and discharge leakage from the pipeline in the covered pipeline system or the connection part between the pipeline and the pipeline joint, and can realize leakage protection for electrical devices and structures around the pipeline system to prevent leakage from dripping and damaging the electrical devices or surrounding structures, and can also avoid safety hazards and environmental pollution caused by leakage.

[0059] The structure of the pipeline connection protection device according to the present invention is convenient to assemble and disassemble, and the visualization of the leakage event is achieved through the setting of the display component.

[0060] The pipeline connection protection device according to the present invention has strong adaptability to pipelines and pipeline joints with different diameters and strong operability.

[0061] According to another aspect of the present invention, a pipeline system is provided, which includes at least one pipeline and at least one pipeline joint, and the at least one pipeline is liquid-tightly connected to the at least one pipeline joint through the pipeline connection protection device as described in any of the above schemes.

[0062] According to another aspect of the present invention, a piping system is proposed, which includes at least one pipe, and an intermediate section of the at least one pipe, for example, a section prone to liquid leakage, is liquid-tightly coated with a pipe connection protection device as described in any of the above-mentioned schemes, so that the pipe extends from a first connection port of the pipe connection protection device into a channel and extends out of the pipe connection protection device from a second connection port.

[0063] The pipeline system according to the present invention uses such a pipeline connection protection device to cover the connection part between the pipeline and the pipeline joint or the pipeline to avoid leakage at the connection part, and can promptly remind the user of the pipeline system in case of leakage, and collect the liquid leaked from the covered part before the user performs maintenance or inspection to prevent the leaked liquid from dripping directly and damaging the device or structure located below the pipeline system.

[0064] According to another aspect of the present invention, a civil aircraft is provided, which has an onboard piping system, the onboard piping system having at least a first pipe and a pipe joint, wherein the first pipe is liquid-tightly connected to the pipe joint by means of a pipe connection protection device according to any of the above-mentioned schemes.

[0065] According to another aspect of the present invention, a civil aircraft is provided, which has an onboard piping system, wherein the onboard piping system has at least a first pipe, wherein the first pipe is liquid-tightly covered with a pipe connection protection device according to any of the above-mentioned schemes, so that the pipe extends from a first connection port of the pipe connection protection device into a channel and extends from a second connection port out of the pipe connection protection device.

[0066] By means of a pipeline connection protection device configured to cover the middle section of the first pipeline in the onboard pipeline system or the first pipeline and the pipeline joint, the civil aircraft according to the present invention can collect the liquid leaked from the onboard pipeline system by means of a collection chamber provided in the pipeline connection protection device when the onboard pipeline system leaks, thereby preventing the leaked liquid from directly dripping onto the electronic devices, electrical equipment and fuselage structure located below the leaking part of the onboard pipeline system, thereby preventing the leaked liquid from damaging the electronic devices, electrical equipment or fuselage structure. This can effectively avoid the impact of pipeline leakage events on aircraft flight safety, and also prevent the leaked liquid from polluting the onboard environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The above-mentioned features and other features and technical advantages of the present invention will be described below with reference to the embodiments shown in the accompanying drawings, which are intended to be understood as exemplary rather than limiting. Unless otherwise specified, the drawings are not necessarily drawn to scale and may be exaggerated for the sake of clarity. In the drawings:

[0068] Figure 1 A perspective view showing a pipeline connection protection device according to an embodiment of the present invention;

[0069] Figure 2 Show according to Figure 1 A three-dimensional exploded view of the pipeline connection protection device shown;

[0070] Figure 3 Show Figure 1 A cross-sectional view of the pipe connection protection device shown;

[0071] Figure 4 Show Figure 1 Another cross-sectional view of the pipeline connection protection device shown; and

[0072] Figure 5 The gasket used in the pipeline connection protection device according to the present invention is shown.

[0073] List of reference numerals:

[0074] CC Collection Chamber

[0075] FC Channel

[0076] 100 Pipeline connection protection device

[0077] 10 Housing

[0078] 11 First half of the housing

[0079] 111 holes

[0080] 112 first radial protrusion

[0081] 12 Second half of the housing

[0082] 122 second radial protrusion

[0083] 13. Part 1

[0084] 14 Second Section

[0085] 21 First connection port

[0086] 22 Secondary port

[0087] 31 First sealing gasket

[0088] 32 Second sealing gasket

[0089] 41 First reducing ring

[0090] 42 Second reducing ring

[0091] 50 display pieces

[0092] 51 Cavity

[0093] 60 Gasket

[0094] 61 First Opening

[0095] 62 Second Opening

[0096] 63 First extension

[0097] 64 Second extension

[0098] 65 Depression

[0099] 66 Protrusion

[0100] 70 Buckle

[0101] 71 First buckle section

[0102] 72 Second buckle section

[0103] 80 Positioning unit

[0104] 81 first protrusion

[0105] 82 Second protrusion

[0106] 83 First recess

[0107] 84 Second recessed portion

[0108] 85 Third protrusion

[0109] 86 Fourth protrusion

[0110] 87 Third recess

[0111] 88 Fourth recessed part

[0112] 90 Collection Grooves

[0113] 91 First Groove

[0114] 92 Second groove. DETAILED DESCRIPTION

[0115] Although the present invention will be described in conjunction with exemplary embodiments, it will be appreciated by those skilled in the art that this specification is not intended to limit the present invention to the described exemplary embodiments. On the contrary, the present invention is intended to cover not only exemplary embodiments, but also various options, modifications, equivalents, etc. that may be included within the spirit and scope of the present invention as defined by the appended claims.

[0116] For ease of interpretation and precise definition in the appended claims, unless otherwise stated, the terms "upper," "lower," "inner," and "outer" are used to describe various features with reference to their positions in the exemplary embodiments shown in the figures.

[0117] Combine the following Figures 1 to 5 A pipeline connection protection device, generally designated by reference numeral 100 , is described.

[0118] The pipeline connection protection device 100 can be set at a location in the onboard pipeline system of a civil aircraft where leakage is likely to occur, or can be set at a location in the onboard pipeline system of a civil aircraft where leakage will affect surrounding key electrical equipment or the structural safety of the aircraft itself, to cover such pipeline locations.

[0119] like Figure 1 As shown, the pipeline connection protection device 100 has a body, which includes a housing 10. The housing 10 is designed to be composed of a first housing half 11 and a second housing half 12. The housing 10 includes a first section 13 with a larger diameter and a cylindrical structure, and a second section 14 extending from a first end of the first section 13 and having a smaller diameter relative to the first section 13.

[0120] The housing 10 is provided with a first connection port 21 at the end of the second section 14. The first connection port 21 is connected to a first pipe in the organic pipeline system in a liquid-tight manner through a first sealing gasket 31 optionally provided therein. By selecting first sealing gaskets 31 of different sizes, pipes with different pipe diameters in the organic pipeline system can be connected to the first connection port 21 in a liquid-tight manner, so that the pipes extend therethrough.

[0121] A second connection port 22 is provided at the other end of the first section 13 of the housing 10. In the illustrated embodiment, the second connection port 22 is connected to a pipe joint in an organic pipe system in a liquid-tight manner through a second sealing gasket 32, a first reducing ring 41, and a second reducing ring 42 which are optionally provided therein. Here, the second connection port 22 of the body of the pipe connection protection device 100 can be adapted to pipe joints of different diameters by means of the first reducing ring 41, the second reducing ring 42, and the second sealing gasket 32.

[0122] Here, the sealing gaskets 31, 32 and the reducing rings 41, 42 provided in the first connection port 21 and the second connection port 22 are determined according to the size of the pipe or pipe joint in the onboard pipe system to which the pipe connection protection device 100 is applied. They are provided in the form of standard parts.

[0123] In particular, if the second connection port 22 of the pipeline connection protection device 100 is connected to a pipeline joint in an organic pipeline system, then the second connection port 22 of the pipeline connection protection device 100, the innermost reducing ring in the radial direction, is the second reducing ring 42, and its thread is matched with the depth of the thread groove of the connecting port of the pipeline joint, thereby ensuring a liquid-tight connection between the second connection port 22 of the pipeline connection protection device 100 and the pipeline joint.

[0124] As from Figure 2As can be seen in the perspective view shown, a first radial protrusion 112 and a second radial protrusion 122 are respectively provided on the circumferential inner surfaces of the first shell half 11 and the second shell half 12, inwardly from the second connection port 22 in the axial direction. They each protrude from the circumferential inner surfaces of the first shell half 11 and the second shell half 12 in the radial direction toward the central axis of the shell 10. Figure 2 The figure also shows the installation direction and tightening direction of the first reducer ring 41, the second reducer ring 42, and the second sealing gasket 32. After the first reducer ring 41, the second reducer ring 42, and the second sealing gasket 32 ​​are pushed in along the axial direction of the housing 10, they are stopped by the first radial protrusion 112 and the second radial protrusion 122 in the axial direction.

[0125] exist Figure 4 2 shows a longitudinal cross-sectional view of the indicator member 50 of the pipeline connection protection device 100 , that is, a longitudinal central cross-section of the pipeline connection protection device 100 .

[0126] like Figure 4 As can be seen in the figure, the first connection port 21 is connected to the second connection port 22 through the channel FC formed by the hollow chamber inside the housing 10. Therefore, the channel FC allows the first pipe in the pipeline system to extend through the first connection port 21 or the second connection port 22, so as to reach the pipe joint connected to the second connection port 22 or the first connection port 21, and connect with the second pipe or the pipe joint.

[0127] Thus, the first pipe in the onboard pipe system passing through the first connecting port 21 can be connected to the pipe joint located at the second connecting port 22 in a liquid-tight manner by means of the pipe connection protection device 100 .

[0128] Refer again Figure 2 And reference Figure 3 The first shell half 11 and the second shell half 12 of the shell 10 are guided and positioned together by the positioning parts 80 arranged at their respective two radial end faces, and are fastened to each other by the buckle parts 70 arranged at the first shell half 11 and the second shell half 12.

[0129] A first protrusion 81 and a second protrusion 82 are provided at the first radial end surface of the first housing half 11, which are spaced apart in the longitudinal direction of the housing 10 and protrude from the first radial end surface in the tangential direction. Opposite to the first protrusion 81 and the second protrusion 82, a first concave portion 83 and a second concave portion 84 are provided at the first radial end surface of the second housing half 12, which are also spaced apart in the longitudinal direction of the housing 10 and concave from the first radial end surface in the tangential direction.

[0130] As in Figure 2As can be seen from the distal side, the second housing half 12 is provided at the second radial end surface with a third protrusion 85 and a fourth protrusion 86 which are spaced apart in the longitudinal direction of the housing 10 and protrude from the second radial end surface in the tangential direction.

[0131] Corresponding to the structure at the above-mentioned second radial end face of the second shell half 12, that is, for accommodating the third protrusion 85 and the fourth protrusion 86 arranged at the above-mentioned second radial end face of the second shell half 12, the first shell half 11 is also provided with a third recessed portion 87 and a fourth recessed portion 88 at the second radial end face located on the far side in the figure. Figure 3 The cross-sectional view obtained by cutting through the pipeline connection protection device 100 along the joint between the first shell half 11 and the second shell half 12 and observing upward, that is, observing toward the circumferential inner surface of the first shell half 11 is shown in detail. Figure 3 In the figure, it can be seen that the first protrusion 81, the second protrusion 82, the third recessed portion 87, and the fourth recessed portion 88 are respectively arranged on the two radial end surfaces of the first housing half 11.

[0132] When the first shell half 11 and the second shell half 12 are assembled to form the shell 10, the first protrusion 81 and the second protrusion 82 arranged at the first radial end surface of the first shell half 11 are inserted into the first recessed portion 83 and the second recessed portion 84 arranged at the first radial end surface of the second shell half 12, and the third protrusion 85 and the fourth protrusion 86 arranged at the second radial end surface of the second shell half 12 are inserted into the third recessed portion 87 and the fourth recessed portion 88 arranged at the second radial end surface of the first shell half 11, so that the first shell half 11 and the second shell half 12 are assembled together by means of the shape matching of the recesses and protrusions in the positioning portion 80.

[0133] like Figure 1 and Figure 2 As can be seen in the figure, the shell 10 is further provided with a buckle portion 70 on the circumferential side surface at the joint position of the first shell half 11 and the second shell half 12. The buckle portion 70 is composed of a first buckle section 71 provided on the circumferential side surface of the first shell half 11, close to the radial first end surface position, and a second buckle section 72 provided on the circumferential side surface of the second shell half 11, close to the radial first end surface position. Through the joint action of the first buckle section 71 and the second buckle section 72, the first shell half 11 and the second shell half 12 that have been spliced ​​together are fastened to each other. Figure 1 , Figure 2 Similarly, another buckle portion 70 is provided on the other side of the housing 10 (not shown). The other buckle portion 70 is also composed of two buckle sections respectively arranged on the circumferential side surfaces of the first housing half 11 and the second housing half 12.

[0134] In order to enhance the liquid tightness of the housing 10 of the split design structure, a gasket 60 is further provided between the first housing half 11 and the second housing half 12. The gasket 60 is customized according to the shape of the joint surface of the first housing half 11 and the second housing half 12.

[0135] Figure 5 A perspective view of the gasket 60 is shown in FIG. Figure 5 As can be seen in the figure, the gasket 60 includes a middle section and a first extension portion 63 and a second extension portion 64 extending from both ends of the middle section respectively along the longitudinal direction of the gasket 60, that is, the length direction. In the middle section of the gasket 60, there are provided a protrusion 66 protruding in a transverse direction perpendicular to the longitudinal direction and a recessed portion 65. The protrusion 66 is used to be placed at the buckle portion 70 to ensure a liquid-tight connection between the first buckle section 71 and the second buckle section 72, so the shape of the protrusion 66 conforms to the transverse interface shape of the first buckle section 71 and the second buckle section 72. In the middle section of the gasket 60, the recessed portion 65 is provided on the opposite side of the protrusion 66 to cooperate with the collection groove 90 formed in the housing 10. A first opening 61 and a second opening 62 are also provided in the middle section of the gasket 60. The openings 61 , 62 are used for projections 81 , 82 or 85 , 86 provided at the radial end surfaces of the first housing half 11 and the second housing half 12 to extend therethrough.

[0136] The first extension 63 is located on the radial inner side of the gasket 60, that is, on the same longitudinal side as the recessed portion 65, and is used for relative sealing between the two housing halves 11 and 12 at the first connection port 21 at the second section 14 of the housing 10 with a smaller radius. The second extension 64 is located on the radial outer side of the gasket 60, that is, on the same longitudinal side as the protrusion 66, and is used for relative sealing between the two housing halves 11 and 12 at the second connection port 22 at the first section 13 of the housing 10 with a larger radius.

[0137] Figure 5 The gasket 60 shown in the figure is only used at one radial end face where the first shell half 11 and the second shell half 12 are attached. In other words, another gasket 60 is also provided at another radial end face of the first shell half 11 and the second shell half 12 opposite to the radial end face, and the shapes of the two gaskets 60 are similar.

[0138] The first housing half 11 of the housing 10 has a hole 111 formed on its circumferential surface. The hole 111 is configured as a threaded through hole. The display element 50 is threadedly connected to the first housing half 11 via the hole 111 . Figure 2The arrow in the figure shows the screwing direction of the display member 50 when it is installed on the body of the pipeline connection protection device 100. The display member 50 is configured as a thin columnar body in the illustrated embodiment. The thin columnar body has a hollow volume formed by a cavity 51 arranged inside it. The thin columnar body is configured as a capillary tube with a diameter of 1 mm. The cavity 51 inside the capillary tube is fluidically connected to the leakage collection chamber formed by the collection groove 90 arranged inside the housing 10, so as to realize the display of the leakage amount of the pipeline connection protection device 100 by using the pressure difference principle. The leakage collection chamber will be further explained below.

[0139] The columnar body of the display element 50 is made of a translucent material, so that the maintenance personnel can quickly check the volume of the liquid in the cavity 51 inside it, thereby determining whether a leakage event has occurred in the connection between the pipe covered by the pipeline connection protection device 100 and the pipe joint, and if a leakage event has occurred, the volume of the currently leaked liquid can be intuitively seen, thereby realizing a visual prompt of the leakage event at the connection between the pipe and the pipe joint. The maintenance personnel can also determine whether it is necessary to perform a leakage event inspection on the pipe system connected to the pipe connection protection device 100 based on the liquid level in the display element 50.

[0140] When it is necessary to discharge the leaked liquid collected in the leakage collection chamber of the shell 10 , it is only necessary to loosen the threaded connection between the display element 50 and the first shell half 11 , and remove the display element 50 to discharge the leaked liquid in the collection chamber CC through the hole 111 .

[0141] In the illustrated embodiment, the hole 111 is configured to have a diameter of 2 mm, and the indicator 50 , in particular the capillary tube configured therein, is in sealing connection with the hole 111 .

[0142] like Figure 3 and Figure 4 As can be seen in the figure, a first groove 91 and a second groove 92 in a semi-annular shape are respectively provided in the circumferential inner surfaces of the first shell half 11 and the second shell half 12. After the first shell half 11 and the second shell half 12 are assembled and fastened to each other, the first groove 91 and the second groove 92 are connected end to end, thereby forming an annular collecting groove 90 extending in the circumferential direction, thereby forming a collecting chamber CC connected to the hole 111 for collecting possible leaked liquid.

[0143] Due to the liquid-tight connection at the first connection port 21, the second connection port 22 and the hole 111 in the pipeline connection protection device 100, if the connection between the pipeline covered by the pipeline connection protection device 100 and the pipeline joint leaks, the leaked liquid will accumulate in the channel FC and then flow into the circumferential groove 90. The circumferential groove 90 is in fluid communication with the cavity 51 in the display element 50 due to the connection between the hole 111 set in the first shell half 11 and the first groove 91, thereby realizing a visual prompt of the leakage event in the following manner: the display element 50 is at least partially constructed of transparent material, so that the liquid level in the cavity 51 is perceptible or visible to the maintenance personnel, maintenance personnel or other on-site personnel. Therefore, the above personnel can observe the occurrence of the leakage event and understand the current scale of the leakage.

[0144] The following is an exemplary description of the installation steps and usage of the pipeline connection protection device 100 in the onboard pipeline system.

[0145] 1. According to the pipe diameters of the pipes at both ends of the target position of the pipeline system or the size of the pipe joints, determine the appropriate first sealing gasket 31, second sealing ring 32, first reducing ring 41 and second reducing ring 42. When it comes to connecting the pipe joint end, ensure that the depth of the thread groove of the connection port of the pipe joint end matches the thread of the second reducing ring 42 it matches;

[0146] 2. Wrap the first shell half 11 and the second shell half 12 on both sides of the target position of the pipeline system respectively;

[0147] 3. Add a special gasket 60 in the middle of the joint between the first shell half 11 and the second shell half 12;

[0148] 4. Use the positioning portion 80 to guide the first shell half 11 and the second shell half 12 to be assembled;

[0149] 5. Fasten the first housing half 11 and the second housing half 12 with the help of the buckle portion 70;

[0150] 6. Install a first sealing gasket 31 at the first connection port 21 to achieve a liquid-tight connection with the pipeline of the pipeline system;

[0151] 7. Install the second sealing gasket 32, the first reducing ring 41, and the second reducing ring 42 at the second connection port 22, so as to achieve a liquid-tight connection with the pipe joint of the pipe system;

[0152] 8. Connect the display element 50 to the main body of the pipeline connection protection device 100 in a liquid-tight manner through the hole 111 of the first shell half 11 .

[0153] At this point, the pipeline connection protection device 100 is installed and wrapped between the connected first pipeline and the pipeline joint.

[0154] Directions:

[0155] 9. If leakage is found in the connection between the pipe covered by the pipe connection protection device 100 and the pipe joint during use, the scale of the liquid leakage that has occurred can be determined according to the liquid level height displayed in the display element 50, and then it can be determined whether the pipe connection protection device 100 needs to be repaired;

[0156] 10. If a leakage event occurs and it is determined that maintenance is required based on the liquid level displayed in the display element 50, the connection between the display element 50 and the shell 10 is loosened, so that the collection chamber CC is fluidically connected to the external environment of the pipeline connection protection device 100 through the hole 111, so that the leaked liquid can be discharged through the hole 111.

[0157] Other Implementations

[0158] In the above embodiment, the pipeline connection protection device 100 is covered outside the connection portion between the first pipeline and the pipeline joint in the pipeline system to protect the connection portion from leakage events that may occur.

[0159] In another embodiment, the pipeline connection protection device 100 may also be wrapped around a single pipeline in the pipeline system, such as the outside of the second pipeline, such as the outside of a portion of the second pipeline that is prone to leakage.

[0160] In this embodiment, the first shell half 11 and the second shell half 12 are respectively covered on both sides of the target part of the second pipe, so that the second pipe extends from the first connection port 21 into the channel FC in the pipeline connection protection device 100, and reaches the second connection port 22 through the channel FC, and extends out of the second connection port 22 to leave the pipeline connection protection device 100.

[0161] Thus, if the target part of the second pipe leaks, the liquid flowing out of the section will also flow into the channel FC and then into the collection chamber CC. The leakage event will also be prompted to the maintenance personnel, maintenance personnel or other on-site personnel through the display unit 50 as explained in the above embodiment.

Claims

1. A pipeline connection protection device (100), the pipeline connection protection device (100) comprising a body, the body having a shell (10), the shell (10) having a first connection port (21) arranged at a first end, a second connection port (22) arranged at a second end opposite to the first end, and a channel (FC) connecting the first connection port (21) and the second connection port (22), characterized in that: One of the first connection port (21) and the second connection port (22) is configured to allow a pipe in a pipe system to pass therethrough in a liquid-tight manner into the channel (FC), and the other connection port is configured to allow the pipe to extend from the channel (FC) in a liquid-tight manner or to allow the pipe to be connected to a pipe joint in the pipe system in a liquid-tight manner, and The pipeline connection protection device also includes a display element (50) and a collection chamber (CC). wherein the collecting chamber (CC) is disposed in the body and is configured to be in fluid communication with the channel (FC) for collecting liquid in the channel (FC), The display element (50) is installed on the housing (10) and is in fluid communication with the collecting chamber (CC); the display element (50) is configured to display the liquid condition in the collecting chamber (CC).

2. The pipeline connection protection device (100) according to claim 1, characterized in that: The display element (50) is at least partially made of transparent material.

3. The pipeline connection protection device (100) according to claim 2, characterized in that: The display element (50) is configured to have a capillary tube inside, and the capillary tube is in fluid communication with the collection chamber (CC).

4. The pipeline connection protection device (100) according to claim 3, characterized in that: The housing (10) is provided with a hole (111) at the outer circumferential surface, wherein the hole (111) is configured as a through hole and is in fluid communication with the collection chamber (CC), so that the display member (50) inserted through the hole (111) can be in fluid communication with the collection chamber (CC).

5. The pipeline connection protection device (100) according to claim 4, characterized in that: The housing (10) is composed of a first housing half (11) and a second housing half (12). The radial end surface of the first shell half (11) is provided with at least one protrusion, The radial end surface of the second shell half (12) is provided with at least one recessed portion. The radial end surface of the first shell half (11) and the radial end surface of the second shell half (12) are opposite to each other, and the first shell half (11) and the second shell half (12) are connected to each other in a shape-fitting manner by means of the at least one protrusion and the at least one recess.

6. The pipeline connection protection device (100) according to claim 5, characterized in that: The first shell half (11) is provided with a first snap-on section (71) on the outer circumferential surface close to the radial end surface of the first shell half (11), and the second shell half (12) is provided with a second snap-on section (72) on the outer circumferential surface close to the radial end surface of the second shell half (12), and the first shell half (11) and the second shell half (12) are fastened to each other by means of the first snap-on section (71) and the second snap-on section (72).

7. The pipeline connection protection device (100) according to claim 6, characterized in that: The channel (FC) is formed by a hollow chamber defined by the first shell half (11) and the second shell half (12) constituting the shell.

8. The pipeline connection protection device (100) according to claim 7, characterized in that: The collecting chamber (CC) is formed by a circumferential groove (90) formed on the inner circumferential surface of the housing (10).

9. The pipeline connection protection device (100) according to claim 8, characterized in that: The circumferential groove (90) is formed by a first groove (91) and a second groove (92) formed at the first housing half (11), wherein the first groove (91) and the second groove (92) are in fluid communication with each other.

10. The pipeline connection protection device (100) according to claim 9, characterized in that: The hole (111) is opened at the outer circumferential surface of the first housing half (11), and the hole (111) is configured to be in fluid communication with the first groove (91).

11. The pipeline connection protection device (100) according to claim 10, characterized in that: The first connection port (21) is connected to the pipeline in a liquid-tight manner by means of a first sealing gasket (31), while the second connection port (22) is connected to a pipeline joint or to the pipeline in a liquid-tight manner by means of a second sealing gasket (32) and at least one reducing ring.

12. The pipeline connection protection device (100) according to claim 11, characterized in that: The housing (10) has a first section (13) including the second end and a second section (14) including the first end, wherein the first section (13) has a radius greater than a radius of the second section (14).

13. A pipeline system, characterized in that: The pipeline system comprises at least one pipeline and at least one pipeline joint. wherein the at least one pipeline is connected to the at least one pipeline joint in a liquid-tight manner through the pipeline connection protection device (100) according to any one of claims 1 to 12, or Wherein, the at least one pipeline enters the channel (FC) through the first connection port (21) of the pipeline connection protection device (100) according to any one of claims 1 to 12 and extends out of the pipeline connection protection device (100) from the second connection port (22).

14. A civil aircraft, comprising an onboard piping system, wherein the onboard piping system comprises at least a first pipe and a pipe joint, wherein: The first pipeline is connected to the pipeline joint in a liquid-tight manner through the pipeline connection protection device (100) according to any one of claims 1 to 12, or The first pipe enters the channel (FC) from the first connection port (21) of the pipeline connection protection device (100) according to any one of claims 1 to 12 and extends out of the pipeline connection protection device (100) from the second connection port (22).

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