Hydrogen pipeline leakage detection device
By wrapping the hydrogen pipeline connection point with a transparent protective shell and attaching hydrogen-sensitive color-changing tape inside, the problems of easy detachment and tape waste in open-air environments are solved, achieving efficient and economical hydrogen leak detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-03-31
AI Technical Summary
Existing hydrogen-sensitive color-changing tapes are prone to falling off in open-air environments, consume a large area of tape, and are not effective in detecting extremely small leaks, leading to detection failure or high economic costs.
Design a hydrogen pipeline leak detection device including a transparent protective shell and hydrogen-sensitive color-changing tape. The transparent protective shell is wrapped around the outside of the connection point, and the hydrogen-sensitive color-changing tape is attached to the inner wall of the shell. The shell is equipped with a buckle structure and a sealing element to form a sealed space to improve detection accuracy.
It improves the detection accuracy and safety of hydrogen-sensitive color-changing tape, avoids tape detachment and waste, reduces economic costs, and can effectively detect trace amounts of hydrogen leakage.
Smart Images
Figure CN224065272U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of new energy safety technology, and in particular to a hydrogen pipeline leakage detection device, a valve container that can protect hydrogen-sensitive materials and improve the hydrogen-sensitive color change detection effect. Background Technology
[0002] Against the backdrop of the global green economic transformation, hydrogen energy, as a zero-pollution clean energy source, boasts high energy density and excellent storage performance, leading to rapid industrial development and a bright future. In recent years, hydrogen energy applications have become increasingly diverse, encompassing hydrogen production, storage, and transportation. However, the flammable and explosive nature of hydrogen has brought its safety to the forefront of industry attention, resulting in the emergence of various hydrogen leak detection methods, such as photoelectric detection instruments and hydrogen-sensitive color-changing tape. Among these, hydrogen-sensitive color-changing tape, with its simple application, rapid detection speed, and clear detection results, has a wide range of applications and is expected to see widespread adoption in the future.
[0003] The existing method of using hydrogen-sensitive color-changing tape is to wrap it around the outside of pipes and valves (such as pipe fittings, valve stems, pipe flanges, etc.) and fix it in place by self-adhesion. The existing use of hydrogen-sensitive tape has the following drawbacks:
[0004] 1) When used, it is directly exposed to the external environment, especially when used on outdoor equipment or vehicles. After long-term exposure to sun and rain, it is inevitable that the adhesive will peel off and the product will lose its leakage detection function.
[0005] 2) When using existing hydrogen-sensitive color-changing tapes, the wrapping method consumes a large area of tape, resulting in high economic costs;
[0006] 3) In cases of extremely small hydrogen leaks, hydrogen-sensitive color-changing tape has no aggregation effect and is prone to causing missed detection. Utility Model Content
[0007] The purpose of this invention is to provide a hydrogen pipeline leak detection device to solve the problems and defects existing in the above-mentioned background technology.
[0008] To achieve the above objectives, the following technical solution is provided:
[0009] A hydrogen pipeline leak detection device includes hydrogen-sensitive color-changing tape and a transparent protective shell. The hydrogen-sensitive color-changing tape is adhered to the inner wall of the transparent protective shell. The transparent protective shell is used to wrap around the connection point of the hydrogen pipeline. An opening is provided on the side wall of the transparent protective shell for the hydrogen pipe or valve stem to pass through. The opening is fitted against the wall of the hydrogen pipe. The transparent protective shell is composed of two interlocking half-shells, and the opening is formed by the merging of the two half-shells.
[0010] Furthermore, a snap-fit structure is provided on the edge of the half-shell. This snap-fit structure on the two half-shells facilitates their engagement, forming a sealed detection space. Even a trace leak of hydrogen can be detected within this sealed space, improving detection accuracy and safety, and preventing safety accidents caused by undetected minor leaks.
[0011] Preferably, the hydrogen-sensitive color-changing tape is adhered to the top of the cavity of the transparent protective shell. Adhering the hydrogen-sensitive color-changing tape to the top of the cavity of the transparent protective shell, i.e., in the direction of hydrogen rising, allows for a larger contact area between leaked hydrogen and the tape, making the color change of the tape more obvious and easier to detect promptly.
[0012] Preferably, a sealing element is provided at the opening. The sealing element between the opening on the transparent protective shell and the hydrogen pipe wall effectively increases the sealing performance of the transparent protective shell cavity, further improving detection accuracy. The sealing element can be made of PTFE tape, rubber gasket, modeling clay, etc.
[0013] Preferably, the sealing element is a rubber gasket. Rubber gaskets are used because they can be reused multiple times and are convenient and quick to use.
[0014] Compared with the prior art, the present invention has the following advantages:
[0015] 1. This utility model is applicable to hydrogen leakage detection at all pipe joints and valve connections. Different transparent protective shells can be made for hydrogen pipeline connection nodes of different types, models and sizes. When in use, the transparent protective shell is wrapped around the outside of the connection node, and the hydrogen-sensitive color-changing tape is pasted on the top of the cavity of the transparent protective shell. The transparent protective shell has windproof, waterproof and heat insulation effects, which can avoid the phenomenon of hydrogen-sensitive color-changing tape peeling and falling off.
[0016] 2. When using this utility model, there is no need to paste or wrap a large amount of hydrogen-sensitive color-changing tape on the connection nodes. Only a small amount of hydrogen-sensitive color-changing tape needs to be pasted on the inner wall of the transparent protective shell. This reduces the amount of tape used compared to the wrapping method and lowers the economic cost.
[0017] 3. In this utility model, a well-sealed cavity is formed inside the transparent protective shell, which can produce an accumulation effect on trace amounts of hydrogen gas, thereby improving the detection effect of the hydrogen-sensitive color-changing tape and reducing missed detections;
[0018] 4. In this utility model, the transparent protective shell can be made of plastic, which is inexpensive and conducive to its widespread use in various industries;
[0019] 5. This utility model has a simple structure, is easy to operate, and can be used without special training, making it convenient to use. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the usage scenario of Embodiment 1 of this utility model;
[0021] Figure 2 This is a schematic diagram of the transparent protective shell structure in Embodiment 1 of this utility model;
[0022] Figure 3 This is a schematic diagram of the usage scenario of Embodiment 2 of this utility model;
[0023] Figure 4 This is a schematic diagram of the usage scenario of Embodiment 3 of this utility model;
[0024] Reference numerals: 1. Transparent protective shell; 11. Side A; 12. Side B; 2. Hydrogen-sensitive color-changing tape; 3. Buckle structure; 4. Opening; 41. First opening; 42. Second opening; 43. Third opening; 5. Shut-off valve; 6. Threaded connector; 7. Four-way pipe connector. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0026] A hydrogen pipeline leak detection device includes a transparent protective shell 1 and a hydrogen-sensitive color-changing tape 2. In use, the transparent protective shell 1 is wrapped around the outside of the connection point on the hydrogen pipeline, and the hydrogen-sensitive color-changing tape 2 is attached to the inner wall of the transparent protective shell 1.
[0027] The transparent protective shell 1 is composed of two half-shells that can be interlocked to form a complete shell. Each half-shell is provided with a snap-fit structure 3 for interlocking. The transparent protective shell 1 has an opening 4 for the hydrogen pipe or valve stem to pass through. The opening 4 is formed by the merging of the two half-shells. The size, number, and direction of the opening 4 on the transparent protective shell 1 are determined according to the size, model, and type of the pipe and valve at the hydrogen pipeline connection point.
[0028] Among them, the four openings are also equipped with sealing elements, which can be PTFE tape, rubber gaskets, modeling clay, etc.
[0029] The transparent protective shell 1 is made of plastic, which is inexpensive.
[0030] The hydrogen-sensitive color-changing tape 2 is attached to the top of the cavity of the transparent protective shell 1, which is the direction in which hydrogen rises.
[0031] Example 1: The hydrogen pipeline connection point is a shut-off valve 5, and hydrogen pipelines are connected to both ends of the shut-off valve 5.
[0032] In this embodiment, the transparent protective shell is composed of two half-shells, A-side 11 and B-side 12, which engage with each other. The transparent protective shell 1 has three openings 4: a first opening 41, a second opening 42, and a third opening 43. The first opening 41 and the second opening 42 are horizontally opposite each other, allowing the left and right hydrogen pipes to pass through. The third opening 43 is located at the top of the transparent protective shell 1, allowing the valve stem of the shut-off valve 5 to pass through, thus exposing the handwheel of the shut-off valve 5 outside the transparent protective shell 1 and not affecting its use. Multiple sets of trapezoidal snap-fit structures 3 are provided on the edges of both half-shells, A-side 11 having male snap-fits and B-side 12 having corresponding female snap-fits. The two half-shells, A-side and B-side, are engaged together by these trapezoidal snap-fit structures 3, enclosing the main body of the shut-off valve 5, with the handwheel of the shut-off valve 5 remaining outside the transparent protective shell.
[0033] In use, the two halves of the transparent protective shell 1, A side 11 and B side 12, are first separated. Then, a small amount of hydrogen-sensitive adhesive tape 2 is torn off and pasted on the top of the two halves of the transparent protective shell 11 and B side 12. Next, the two halves of the transparent protective shell 11 and B side 12 are wrapped around the connection point of the hydrogen pipeline, that is, the outside of the shut-off valve 5. The two hydrogen pipelines connected to the shut-off valve 5 and the valve stem of the shut-off valve 5 pass through the opening 4 on the transparent protective shell 1. The handwheel on the shut-off valve 5 remains outside the transparent protective shell 1. Finally, press firmly to make the two halves of the transparent protective shell 11 and B side 12 firmly locked together.
[0034] When a hydrogen leak occurs at the connection point of the hydrogen pipeline, the leaked hydrogen accumulates in the cavity of the transparent protective shell 1. The hydrogen rises to the top of the cavity of the transparent protective shell 1 and comes into contact with the hydrogen-sensitive color-changing tape 2, reacting with the substances on the tape and causing it to change color. Safety inspectors can then detect the leak in time and take repair measures.
[0035] Example 2: The hydrogen pipeline connection point is a threaded connector 6, to which two hydrogen pipes are connected. In this example, the transparent protective shell 1 has two openings 4, and the other structures, operating principles, and methods are the same as in Example 1.
[0036] Example 3: The hydrogen pipeline connection point is a four-way connector 7, to which four hydrogen pipes are connected. In this example, the transparent protective shell 1 has four openings 4, and the other structures, operating principles, and methods are the same as in Example 1.
[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A hydrogen line leak detection apparatus comprising a hydrogen sensitive color changing tape, characterized in that, The transparent protective shell is used for wrapping the connecting node outside the hydrogen pipeline, an opening is arranged on the side wall of the transparent protective shell for the hydrogen pipeline or valve rod to pass out, the opening is attached to the hydrogen pipeline wall, and the transparent protective shell is composed of two half shells which are mutually clamped.
2. The hydrogen gas line leak detection apparatus according to claim 1, characterized by, A buckle structure is arranged on the edge of the half shell.
3. The hydrogen gas line leak detection apparatus according to claim 1, characterized by, The hydrogen-sensitive discoloration tape is attached to the top of the cavity of the transparent protective shell.
4. The hydrogen gas line leak detection apparatus according to claim 1, characterized by, A sealing piece is arranged at the opening.
5. The hydrogen gas line leak detection apparatus according to claim 4, characterized by, The sealing piece is a rubber pad.