Strength testing tool for glass reinforced plastic pipe for supporting liquid hydrogen container
By designing a fiberglass pipe strength testing tool for liquid hydrogen container support, the problems of low testing efficiency and unintuitive results in the existing technology are solved, and efficient and accurate results of two fiberglass pipes are achieved at one time, which is suitable for Various tensioner environments reduce the testing costs of the manufacturer.
Patent Information
- Application Number
- CN202323386180.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-13
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2033-12-13
AI Technical Summary
The prior art is inefficient when testing the strength of fiberglass pipes, and cannot test multiple pipes at once, and the test results are not intuitive, especially when liquid hydrogen container manufacturers do not have a press or tensioner, which increases costs.
A fiberglass tube strength testing tool for liquid hydrogen container supported by a left and right test tool is designed. It can test two fiberglass tubes at one time through the head end cover, connecting sleeve, tail end cover and tie rod. Welded or adjustable fixed connection structure to intuitively observe the test results.
It improves the testing efficiency and can test two fiberglass pipes at one time. The results are accurate and reliable, suitable for various forms of tension machines, reducing the testing cost.
Smart Images
Figure CN222318650U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glass fiber reinforced plastic pipe testing, in particular to a glass fiber reinforced plastic pipe strength testing tool for supporting a liquid hydrogen container. Background Art
[0002] Glass fiber reinforced plastic pipes are preferably used as supporting component materials for supporting the inner container in liquid hydrogen containers because of their advantages such as good corrosion resistance, good anti-aging performance, good anti-freezing performance, small heat transfer coefficient and high strength.
[0003] For FRP pipes of different brands, same specifications, and same material grades, the strength of FRP pipes of different brands, same specifications, and same material grades will be different due to the differences in production and processing of different manufacturers. For FRP pipes of the same brand, same specifications, and different material grades, the strength of FRP pipes of the same brand, same specifications, and different material grades will be different due to the differences in the proportions of the various components. Therefore, when selecting FRP pipes for liquid hydrogen container support, when faced with a batch of FRP pipes of different brands, same specifications, and same material grades, or when faced with a batch of FRP pipes of the same brand, same specifications, and different material grades, it is necessary to test each FRP pipe in order to select the best pipe in the batch.
[0004] At present, the method of testing FRP pipes is to use a press or a tensile machine with a pressing function to test the FRP pipes. In the above two testing methods, only one FRP pipe can be tested during each test, which has low testing efficiency and the test results are not intuitive. In addition, when the liquid hydrogen container manufacturer is not equipped with a press or the equipped tensile machine does not have a pressing function, the FRP pipe cannot be tested and can only be sent to an external testing unit, which increases costs. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide a glass fiber reinforced plastic pipe strength testing tool for supporting a liquid hydrogen container which is easy to use and has intuitive and reliable test results.
[0006] In order to solve the above problems, the technical solution adopted by the utility model is as follows: the strength test fixture of the glass fiber reinforced plastic pipe for supporting a liquid hydrogen container is composed of a left test fixture and a right test fixture; the left test fixture and the right test fixture are both composed of a head end cover, a connecting sleeve, a tail end cover and a pull rod; the head end cover is fixedly sealed at the head opening of the connecting sleeve, and a first connecting hole and a second connecting hole are sequentially opened inwardly on the outer end surface of the head end cover, the aperture of the first connecting hole is smaller than the aperture of the second connecting hole, and the aperture of the first connecting hole is Smaller than the outer diameter of the FRP pipe to be tested; the pull rod passes through the first connecting hole and the second connecting hole and then extends into the connecting sleeve, a fixed connecting end is provided at the head of the pull rod located outside the first connecting hole, and a shaft shoulder is provided at the tail of the pull rod, and the outer diameter of the shaft shoulder is larger than the inner diameter of the FRP pipe to be tested; the tail end cover is fixedly sealed at the tail open mouth of the connecting sleeve; the tail end cover of the left test tool is fixedly connected to the tail end cover of the right test tool, and the axis of the pull rod in the left test tool overlaps with that in the right test tool.
[0007] Among them, the tail end cover of the left test fixture and the tail end cover of the right test fixture can be fixed by direct welding. In addition to the above welding fixation method, the tail end cover of the left test fixture and the tail end cover of the right test fixture can also be fixed by the following structure:
[0008] An intermediate connecting block is arranged on the rear end cover of the left test fixture, and a middle through hole is provided on the intermediate connecting block; a first connecting block and a second connecting block are arranged on the rear end cover of the right test fixture, and an embedding groove for the intermediate connecting block to be embedded is formed between the first connecting block and the second connecting block, a first through hole is provided on the first connecting block, and a second through hole is provided on the second connecting block; after the intermediate connecting block is embedded in the embedding groove, the bolt passes through the first gasket, the first through hole, the middle through hole, the second through hole, the second gasket, and then is tightened with the locking nut.
[0009] Furthermore, in the aforementioned strength testing tool for a glass fiber reinforced plastic pipe for supporting a liquid hydrogen container, two platforms parallel to each other are arranged on the fixed connection end, a fixing hole penetrating the two platforms is arranged on the fixed connection end, the axis of the fixing hole is perpendicular to the two platforms, and the axis of the fixing hole is perpendicular to the axis of the pull rod; the axis of the fixing hole on the fixed connection end of the left test tool, the axis of the fixing hole on the fixed connection end of the right test tool, the axis of the pull rod of the left test tool, the axis of the pull rod of the right test tool, and the axis of the bolt are all in the same plane.
[0010] Furthermore, in the aforementioned glass fiber reinforced plastic pipe strength testing tool for supporting a liquid hydrogen container, the middle connecting block, the first connecting block, and the second connecting block are all U-shaped block structures; the fixed connecting end is integrally formed of a hemisphere and a cylinder in sequence from the head to the tail, and the two platforms cut inward from the head end of the fixed connecting end are U-shaped surfaces of the same size and shape, and the axis of the fixing hole passes through the center of the hemisphere.
[0011] Furthermore, in the aforementioned glass fiber reinforced plastic pipe strength testing tool for supporting a liquid hydrogen container, the tie rod is integrally formed from a first tie rod, a truncated cone connecting rod, a second tie rod, and a shaft shoulder in sequence from the head to the tail, the diameter of the first tie rod is smaller than the diameter of the second tie rod, the small end of the truncated cone connecting rod is smoothly connected to the tail end of the first tie rod, the large end of the truncated cone connecting rod is smoothly connected to the head end of the second tie rod, and the diameter of the second tie rod is smaller than the outer diameter of the shaft shoulder.
[0012] The beneficial effect of the utility model is that the tooling can test two glass fiber reinforced plastic pipes at one time, which not only improves the test efficiency, but also can intuitively observe the strength test results of the two glass fiber reinforced plastic pipes, and the test results are accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of a first embodiment of a glass fiber reinforced plastic pipe strength testing tool for supporting a liquid hydrogen container described in the utility model.
[0014] Figure 2 yes Figure 1 Schematic diagram of the internal structure.
[0015] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure.
[0016] Figure 4 It is a structural schematic diagram of a second embodiment of a glass fiber reinforced plastic pipe strength testing tool for supporting a liquid hydrogen container described in the utility model.
[0017] Figure 5 yes Figure 4 Schematic diagram of the internal structure.
[0018] Figure 6 yes Figure 4 Schematic diagram of the three-dimensional structure. DETAILED DESCRIPTION
[0019] The technical solution of the present utility model is further described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0020] The glass fiber reinforced plastic pipe strength testing tool for liquid hydrogen container support described in the utility model can be used on various forms of tensile testing machines, and the tool can test two glass fiber reinforced plastic pipes at a time, which not only improves the test efficiency, but also can intuitively observe which of the two glass fiber reinforced plastic pipes has a stronger strength, and the test result is accurate and reliable. Embodiment 1
[0021] like Figure 1 , Figure 2 and Figure 3 As shown, a strength test fixture for a glass fiber reinforced plastic pipe for supporting a liquid hydrogen container described in this embodiment is composed of a left test fixture 100 and a right test fixture 200. The left test fixture 100 and the right test fixture 200 are both composed of a head end cover 1, a connecting sleeve 2, a tail end cover 3 and a pull rod 4. The head end cover 1 is fixedly sealed at the head opening of the connecting sleeve 2, wherein the head end cover 1 and the connecting sleeve 2 are usually fixed by welding. A first connecting hole 11 and a second connecting hole 12 are sequentially opened inward on the outer end surface of the head end cover 1, the aperture of the first connecting hole 11 is smaller than the aperture of the second connecting hole 12, and the aperture of the first connecting hole 11 is smaller than the outer diameter of the glass fiber reinforced plastic pipe to be tested. The pull rod 4 passes through the first connecting hole 11 and the second connecting hole 12 and then extends into the connecting sleeve 2. A fixed connecting end 5 is provided at the head of the pull rod 4 located outside the first connecting hole 11, wherein the fixing method of the pull rod 4 and the fixed connecting end 5 is usually welding. A shoulder 44 is provided at the tail of the tie rod 4, and the outer diameter of the shoulder 44 is larger than the inner diameter of the glass fiber reinforced plastic pipe to be tested. The tail end cover 3 is fixedly sealed at the tail opening of the connecting sleeve 2, wherein the tail end cover 3 and the connecting sleeve 2 are usually fixed by welding. The tail end cover of the left test fixture 100 is fixedly connected to the tail end cover of the right test fixture 200, and the axis of the tie rod in the left test fixture 100 overlaps with the axis of the tie rod in the right test fixture 200.
[0022] The rear end cover of the left test fixture 100 and the rear end cover of the right test fixture 200 may be fixed by direct welding.
[0023] In this embodiment, two parallel platforms 51 are provided on the fixed connection end 5, and a fixing hole 52 penetrating the two platforms is provided on the fixed connection end 5, and the axis of the fixing hole 52 is perpendicular to the two platforms 51, and the axis of the fixing hole 52 is perpendicular to the axis of the pull rod 4. The axis of the fixing hole on the fixed connection end of the left test fixture 100, the axis of the fixing hole on the fixed connection end of the right test fixture 200, the axis of the pull rod of the left test fixture 100, and the axis of the pull rod of the right test fixture 200 are all in the same plane.
[0024] In this embodiment, the fixed connection end 5 is formed by a hemisphere and a cylinder in sequence from the head to the tail, and the two platforms 51 cut inward from the head end of the fixed connection end 5 are U-shaped surfaces of the same size and shape, and the axis of the fixing hole 52 passes through the center of the hemisphere.
[0025] In this embodiment, the pull rod 4 is integrally formed by a first pull rod 41, a conical connecting rod 42, a second pull rod 43, and a shoulder 44 in sequence from the head to the tail. The diameter of the first pull rod 41 is smaller than the diameter of the second pull rod 43. The small end of the conical connecting rod 42 is smoothly connected to the tail end of the first pull rod 41, and the large end of the conical connecting rod 42 is smoothly connected to the head end of the second pull rod 43. The diameter of the second pull rod 43 is smaller than the outer diameter of the shoulder 44.
[0026] The working principle of the above-mentioned glass fiber reinforced plastic pipe strength test tool for liquid hydrogen container support is as follows:
[0027] Assume that two FRP pipes to be tested are selected: No. 1 FRP pipe 10 to be tested and No. 2 FRP pipe 20 to be tested for strength test. First, install No. 1 FRP pipe 10 to be tested on the left test fixture 100, and install No. 2 FRP pipe 20 to be tested on the right test fixture 100. Then install the fixed connection end on the left test fixture 100 and the fixed connection end on the right test fixture 200 on the tensile testing machine. Under the tensile force of the tensile testing machine, pull the pull rod on the left test fixture 100 and the pull rod on the right test fixture 100 outward at the same time to perform a tensile test. During the test, the tensile force is gradually loaded until any FRP pipe to be tested is destroyed. The FRP pipe to be tested that is destroyed after selection is the best pipe among the two FRP pipes to be tested. Embodiment 2
[0028] like Figure 4 , Figure 5 and Figure 6As shown, a strength test fixture for a glass fiber reinforced plastic pipe for supporting a liquid hydrogen container described in this embodiment is composed of a left test fixture 100 and a right test fixture 200. The left test fixture 100 and the right test fixture 200 are both composed of a head end cover 1, a connecting sleeve 2, a tail end cover 3 and a pull rod 4. Among them, the head end cover 1 is fixedly sealed at the head opening of the connecting sleeve 2, and a first connecting hole 11 and a second connecting hole 12 are sequentially opened inward on the outer end surface of the head end cover 1. The aperture of the first connecting hole 11 is smaller than the aperture of the second connecting hole 12, and the aperture of the first connecting hole 11 is smaller than the outer diameter of the glass fiber reinforced plastic pipe to be tested. The pull rod 4 passes through the first connecting hole 11 and the second connecting hole 12 and then extends into the connecting sleeve 2. A fixed connecting end 5 is provided at the head of the pull rod 4 located outside the first connecting hole 11, and a shaft shoulder 44 is provided at the tail of the pull rod 4. The outer diameter of the shaft shoulder 4 is larger than the inner diameter of the glass fiber reinforced plastic pipe to be tested. The tail end cover 3 is fixedly sealed at the tail opening of the connecting sleeve 2. The tail end cover of the left test fixture 100 is fixedly connected to the tail end cover of the right test fixture 200, and the axis of the pull rod in the left test fixture 100 overlaps with the axis of the pull rod in the right test fixture 200.
[0029] Among them, in addition to the welding fixing method described in Example 1, the fixed connection structure between the tail end cover of the left test tool 100 and the tail end cover of the right test tool 200 in this embodiment, on the basis of the above structure, selects the following structure for the fixed connection structure between the tail end cover of the left test tool 100 and the tail end cover of the right test tool 200: In this embodiment, an intermediate connecting block 6 is provided on the tail end cover of the left test tool 100, and a middle through hole 61 is opened on the intermediate connecting block 6. A first connecting block 7 and a second connecting block 8 are provided on the rear end cover of the right test fixture 200, and an embedding groove for the intermediate connecting block 6 to be embedded is formed between the first connecting block 7 and the second connecting block 8, a first through hole is provided on the first connecting block 7, and a second through hole is provided on the second connecting block 8; after the intermediate connecting block 6 is embedded in the embedding groove, the bolt 9 passes through the first gasket 91, the first through hole, the middle through hole 61, the second through hole, the second gasket 92, and then is tightened with the locking nut 93, thereby fixing the rear end cover of the left test fixture 100 and the rear end cover of the right test fixture 200 together.
[0030] In this embodiment, two platforms 51 parallel to each other are provided on the fixed connection end 5, and a fixing hole 52 penetrating the two platforms is provided on the fixed connection end 5, and the axis of the fixing hole 52 is perpendicular to the two platforms 51, and the axis of the fixing hole 52 is perpendicular to the axis of the tie rod 4. The axis of the fixing hole on the fixed connection end of the left test fixture 100, the axis of the fixing hole on the fixed connection end of the right test fixture 200, the axis of the tie rod of the left test fixture 100, the axis of the tie rod of the right test fixture 200, and the axis of the bolt 9 are all in the same plane.
[0031] In this embodiment, the middle connecting block 6, the first connecting block 7, and the second connecting block 8 are all U-shaped block structures, and the U-shaped block structure can conveniently adjust the relative position of the axis of the pull rod of the left test fixture 100 and the axis of the pull rod of the right test fixture 200. In this embodiment, the fixed connection end 5 is formed by a hemisphere and a cylinder in sequence from the head to the tail, and the two platforms 51 cut inward from the head end of the fixed connection end 5 are U-shaped surfaces of the same size and shape, and the axis of the fixing hole 52 passes through the center of the hemisphere.
[0032] In this embodiment, the pull rod 4 is integrally formed by a first pull rod 41, a conical connecting rod 42, a second pull rod 43, and a shoulder 44 in sequence from the head to the tail. The diameter of the first pull rod 41 is smaller than the diameter of the second pull rod 43. The small end of the conical connecting rod 42 is smoothly connected to the tail end of the first pull rod 41, and the large end of the conical connecting rod 42 is smoothly connected to the head end of the second pull rod 43. The diameter of the second pull rod 43 is smaller than the outer diameter of the shoulder 44.
[0033] The working principle of the above-mentioned glass fiber reinforced plastic pipe strength test tool for liquid hydrogen container support is as follows:
[0034] Assume that two FRP pipes to be tested are selected: No. 1 FRP pipe 10 to be tested and No. 2 FRP pipe 20 to be tested for strength test. First, install No. 1 FRP pipe 10 to be tested on the left test fixture 100, and install No. 2 FRP pipe 20 to be tested on the right test fixture 100. Then install the fixed connection end on the left test fixture 100 and the fixed connection end on the right test fixture 200 on the tensile testing machine. Under the tensile force of the tensile testing machine, pull the pull rod on the left test fixture 100 and the pull rod on the right test fixture 100 outward at the same time to perform a tensile test. During the test, the tensile force is gradually loaded until any FRP pipe to be tested is destroyed. The FRP pipe to be tested that is destroyed after selection is the best pipe among the two FRP pipes to be tested.
[0035] The above description is only a preferred embodiment of the present invention and does not constitute any other limitation on the present invention. Any modification or equivalent change made based on the technical essence of the present invention still falls within the scope of protection required by the present invention.
Claims
1. A strength test tool for glass fiber reinforced plastic pipes used to support liquid hydrogen containers, characterized in that: It is composed of a left test fixture and a right test fixture; both of the left test fixture and the right test fixture are composed of a head end cover, a connecting sleeve, a tail end cover and a pull rod; the head end cover is fixedly sealed at the head open mouth of the connecting sleeve, and a first connecting hole and a second connecting hole are sequentially opened inward on the outer end surface of the head end cover, the aperture of the first connecting hole is smaller than the aperture of the second connecting hole, and the aperture of the first connecting hole is smaller than the outer diameter of the glass fiber reinforced plastic pipe to be tested; the pull rod passes through the first connecting hole and the second connecting hole and then extends into the connecting sleeve, a fixed connecting end is provided at the head of the pull rod located outside the first connecting hole, and a shaft shoulder is provided at the tail of the pull rod, and the outer diameter of the shaft shoulder is larger than the inner diameter of the glass fiber reinforced plastic pipe to be tested; the tail end cover is fixedly sealed at the tail open mouth of the connecting sleeve; the tail end cover of the left test fixture is fixedly connected to the tail end cover of the right test fixture, and the axis of the pull rod in the left test fixture overlaps with that in the right test fixture.
2. The strength testing tool for a glass fiber reinforced plastic pipe for supporting a liquid hydrogen container according to claim 1, characterized in that: The structure of the fixed connection between the rear end cover of the left test tooling and the rear end cover of the right test tooling is as follows: an intermediate connecting block is arranged on the rear end cover of the left test tooling, and a middle through hole is provided on the intermediate connecting block; a first connecting block and a second connecting block are arranged on the rear end cover of the right test tooling, an embedding groove for the intermediate connecting block to be embedded is formed between the first connecting block and the second connecting block, a first through hole is provided on the first connecting block, and a second through hole is provided on the second connecting block; after the intermediate connecting block is embedded in the embedding groove, the bolt passes through the first gasket, the first through hole, the middle through hole, the second through hole, the second gasket and then is tightened with the locking nut.
3. A glass fiber reinforced plastic pipe strength testing tool for liquid hydrogen container support according to claim 2, characterized in that: Two platforms parallel to each other are arranged on the fixed connection end, and a fixing hole penetrating the two platforms is arranged on the fixed connection end, the axis of the fixing hole is perpendicular to the two platforms, and the axis of the fixing hole is perpendicular to the axis of the pull rod; the axis of the fixing hole on the fixed connection end of the left test tooling, the axis of the fixing hole on the fixed connection end of the right test tooling, the axis of the pull rod of the left test tooling, the axis of the pull rod of the right test tooling, and the axis of the bolt are all in the same plane.
4. A glass fiber reinforced plastic pipe strength testing tool for liquid hydrogen container support according to claim 3, characterized in that: The middle connecting block, the first connecting block and the second connecting block are all U-shaped block structures; the fixed connecting end is formed by a hemisphere and a cylinder in sequence from the head to the tail, and the two platforms cut inward from the head end of the fixed connecting end are U-shaped surfaces of the same size and shape, and the axis of the fixing hole passes through the center of the hemisphere.
5. The strength testing tool for a glass fiber reinforced plastic pipe for supporting a liquid hydrogen container according to claim 1, characterized in that: The pull rod is integrally formed from a first pull rod, a truncated cone connecting rod, a second pull rod, and a shaft shoulder in sequence from the head to the tail. The diameter of the first pull rod is smaller than the diameter of the second pull rod. The small end of the truncated cone connecting rod is smoothly connected to the tail end of the first pull rod, and the large end of the truncated cone connecting rod is smoothly connected to the head end of the second pull rod. The diameter of the second pull rod is smaller than the outer diameter of the shaft shoulder.