CN220136882U - Constant-load long-term bending strain test device for fiber reinforced plastic pipe - Google Patents
Constant-load long-term bending strain test device for fiber reinforced plastic pipe Download PDFInfo
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- CN220136882U CN220136882U CN202321387448.4U CN202321387448U CN220136882U CN 220136882 U CN220136882 U CN 220136882U CN 202321387448 U CN202321387448 U CN 202321387448U CN 220136882 U CN220136882 U CN 220136882U
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- 238000012360 testing method Methods 0.000 title claims abstract description 56
- 238000005452 bending Methods 0.000 title claims abstract description 34
- 229920002430 Fibre-reinforced plastic Polymers 0.000 title claims abstract description 33
- 239000011151 fibre-reinforced plastic Substances 0.000 title claims abstract description 33
- 230000007774 longterm Effects 0.000 title claims abstract description 33
- 230000000670 limiting effect Effects 0.000 claims abstract description 39
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 23
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a fiber reinforced plastic pipe constant load long-term bending strain test device, which comprises: a container; a first loading unit; the second loading part is suitable for arranging a sample to be tested between the first loading part and the second loading part; a loading guide part arranged in the container; the loading support part is arranged on the loading guide part and can move along the guide direction, and is provided with a penetrating screw hole; the guide limiting part is used for fixing the position of the loading supporting part on the loading guide part; the loading screw rod is penetrated into the screw hole on the loading support part and is in threaded connection with the screw hole, and the bottom end of the loading screw rod is propped against the first loading part; and the load sensor is used for detecting the load carried by the sample to be detected. The test device realizes stable and constant pressurization of the sample through the loading screw rod, and realizes stepless continuous adjustment of the load size through the loading screw rod, so that the test device is convenient to operate manually; the loading position is adjusted by adjusting the position of the loading support part on the loading support part, so that the method is suitable for measuring samples with different pipe diameters.
Description
Technical Field
The utility model belongs to the technical field of fiber reinforced plastic product testing devices, and particularly relates to a constant-load long-term bending strain testing device for a fiber reinforced plastic pipe.
Background
The fiber reinforced plastic pipe has the advantages of light weight, simple installation and maintenance, better fluid mechanics, low pumping energy consumption, low service life cost and the like, and has wide application prospect. Then, in the pipeline put into operation, quality accidents such as pipe explosion and the like occur sometimes, and even bad influence is caused. The design defect of the pipeline is one of reasons for quality accidents, and on the other hand, the fiber reinforced plastic pipe runs for a long time in a buried environment, and the deformation resistance or bending strain of the fiber reinforced plastic pipe is inevitably reduced due to material aging, environmental corrosion, load change and the like. Therefore, the long-term ultimate bending strain value of fiber reinforced plastic pipes is an important parameter to be examined in the design process. The long-term bending strain test is significant for ensuring the quality of pipelines and pipeline engineering.
GB/T32378-2015/ISO 10471:2003 measuring method of long-term limit bending strain and long-term limit bending deformation under wet state environment of glass fiber reinforced thermosetting resin tube describes a testing device for measuring long-term limit bending strain of glass fiber reinforced thermosetting resin tube, as shown in figure 3, the testing device comprises a container, upper and lower loading plates and a load (generally weight) which loads the upper loading plate to apply radial compressive force to a sample, the testing device has a simple structure, but the loading pressurization is unstable during the testing process, and the loading direction is also unstable and is easy to change. The standard of the GB/T21238-2016 glass fiber reinforced plastic sand-lined pipe product records the A method in a long-term bending strain test and determination method, wherein the adopted testing device is shown in figure 4, and comprises a container, a load guide rod, a load (generally a weight) arranged on the load guide rod through a load guide ring, an upper loading plate and a lower loading plate, wherein the load in the loading process can be guided through the load guide rod, so that the unstable loading direction in the loading process is prevented, and the load applied to a sample in the testing process of the testing device is also unstable.
Disclosure of Invention
The technical problem solved by the utility model is to provide a fiber reinforced plastic pipe constant load long-term bending strain test device, which realizes stable and constant pressurization of a sample through a loading screw, and realizes stepless continuous adjustment of load size through the loading screw, so that the device is convenient to operate manually; the loading position is adjusted by adjusting the position of the loading support part on the loading support part, so that the method is suitable for measuring samples with different pipe diameters.
In order to solve the above problems, the present utility model provides a fiber reinforced plastic pipe constant load long-term bending strain test device, comprising:
a container for holding a liquid;
a first loading part arranged in the container;
the second loading part is arranged in the container and positioned below the first loading part, and a sample to be tested is arranged between the first loading part and the second loading part;
a loading guide portion provided in the container;
the loading support part is movably arranged on the loading guide part along the guide direction and is provided with a penetrating screw hole;
the guide limiting part is used for fixing the position of the loading supporting part on the loading guiding part;
the loading screw rod is penetrated into the screw hole on the loading support part and is in threaded connection with the screw hole; the bottom end of the loading screw rod is propped against the first loading part;
and the load sensor is used for detecting the load carried by the sample to be detected.
Preferably, the first loading portion includes a first loading plate.
Preferably, the first loading part further comprises a first side plate and a second side plate which are respectively arranged at two sides of the first loading plate.
Preferably, the second loading portion includes a second loading plate.
Preferably, the second loading part further comprises a third side plate and a fourth side plate which are respectively arranged at two sides of the second loading plate.
Preferably, the loading guide part comprises at least 4 guide rods which are arranged in parallel; the loading support part is provided with a guide hole; the guide rod penetrates through the guide hole.
Preferably, the guiding and limiting part comprises an upper limiting part and a lower limiting part which are arranged on the guiding rod, the upper limiting part is positioned above the loading supporting part, the lower limiting part is positioned below the loading supporting part, and the upper limiting part and the lower limiting part can be positioned along the guiding rod and fixed with the guiding rod.
Preferably, the method further comprises:
the first rubber sheet is arranged between the first loading part and the sample to be tested;
the second rubber sheet is arranged between the second loading part and the sample to be tested.
Preferably, the method further comprises:
the screw limiting part is used for fixing the positions of the loading screw and the loading supporting part.
Preferably, the method further comprises:
and the hand wheel is connected with the top end of the loading screw rod.
Compared with the prior art, the utility model has the following beneficial effects:
according to the fiber reinforced plastic pipe constant load long-term bending strain test device, the loading screw is used for pressurizing, the loading sensor is used for accurately measuring the loading load, the loading load is uniformly transmitted to the sample through the first loading part and the second loading part, and the position of the loading screw is fixed through the matching of the loading screw and the screw hole on the loading support part, so that the stable and constant pressurizing of the sample can be realized; in addition, the stretching length of the loading screw is adjusted by rotating the loading screw, so that stepless continuous adjustment of the load size can be realized, and the manual operation is convenient and easy; the position of the loading support part on the loading support part is adjusted, so that the method is applicable to measurement of samples with different pipe diameters.
Drawings
FIG. 1 is a side view of a fiber reinforced plastic pipe constant load long-term bending strain test apparatus according to an embodiment of the present utility model;
FIG. 2 is a front view of a fiber reinforced plastic pipe constant load long-term bending strain test apparatus according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of the structure of a test device described in Standard GB/T32378-2015/ISO 10471:2003;
FIG. 4 is a schematic diagram showing the structure of a test apparatus described in Standard GB/T21238-2016.
Wherein: 1-a container; 2-a first loading section; 21-a first load plate; 22-a first side panel; 23-a second side panel; 3-a second loading section; 4-a sample to be tested; 5-loading guide; 51-a guide bar; 6-loading the support; 7-guiding and limiting parts; 71-an upper limit part; 72-a lower limit part; 8-loading screw; 9-a load sensor; 10-a first rubber sheet; 11-a second rubber sheet; 12-a screw limiting part; 13-a hand wheel; 14-loading plate; 15-aqueous solution.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Example 1
As shown in fig. 1 and 2, a fiber reinforced plastic pipe constant load long-term bending strain test device according to this embodiment includes:
a container 1 for holding a liquid;
a first loading unit 2 provided in the container 1;
a second loading part 3 disposed in the container 1 and located below the first loading part 2, wherein a sample 4 to be measured is disposed between the first loading part 2 and the second loading part 3;
a loading guide 5 provided in the container 1;
the loading support part 6 is movably arranged on the loading guide part 5 along the guide direction, and a penetrating screw hole is formed in the loading support part 6;
a guiding and limiting part 7 for fixing the position of the loading support part 6 on the loading guide part 5;
the loading screw rod 8 is penetrated into the screw hole on the loading support part 6 and is in threaded connection with the screw hole; the bottom end of the loading screw rod 8 is propped against the first loading part 2;
and the load sensor 9 is used for detecting the load carried by the sample 4 to be tested.
The fiber reinforced plastic pipe constant load long-term bending strain test device of the embodiment comprises the following steps of: the method comprises the steps of transversely placing a fiber reinforced plastic pipe to be tested in a certain length between a first loading part 2 and a second loading part 3, enabling a loading direction to be along the radial direction of a sample to be tested, adjusting a loading supporting part 6 to a proper position along a loading guide part 5, fixing the position of the loading supporting part 6 through a guide limiting part 7, rotating a loading screw rod 8, enabling the bottom end of the loading screw rod 8 to move downwards until the bottom end of the loading screw rod 8 abuts against the first loading part 2, applying pressure to the first loading part 2, evenly transmitting loading force to the sample to be tested through the first loading part 2 and the second loading part 3 until the load size borne by the sample to be tested measured detected by a load sensor 9 meets the test standard, fixing the loading screw rod and a screw hole position, and releasing the loading screw rod after the time required by the test is met, or adjusting the position of the loading screw rod in the screw hole when the load is required to be adjusted in the test process, changing the load size, and then measuring. Wherein the container may be filled with an aqueous solution 15, the height of which ensures that the sample is entirely in the aqueous solution, depending on the environment actually required for the test (e.g., measuring performance in a wet environment).
According to the fiber reinforced plastic pipe constant-load long-term bending strain test device, the loading screw is used for pressurizing, the loading sensor accurately measures the loading load, the loading load is uniformly transmitted to the sample through the first loading part and the second loading part, and the position of the loading screw is fixed through the cooperation of the loading screw and the screw hole on the loading support part, so that the stable constant pressurizing of the sample can be realized; in addition, the stretching length of the loading screw is adjusted by rotating the loading screw, so that stepless continuous adjustment of the load size can be realized, and the manual operation is convenient and easy; the position of the loading support part on the loading support part is adjusted, so that the method is applicable to measurement of samples with different pipe diameters.
In some embodiments, the first loading portion 2 includes a first loading plate 21. The pressure applied by the load screw is uniformly transferred to the test specimen by the first load plate 21. Specifically, the material of the first loading plate is not particularly limited as long as it has a certain rigidity. The size of the first loading plate is not particularly limited, and the width thereof (width in the length direction of the tube of the sample to be tested) is preferably larger than the length of the tube of the sample to be tested, so that the clamping of the sample by the loading part is more stable during the test.
In some embodiments, the first loading part 2 further includes a first side plate 22 and a second side plate 23 disposed at both sides of the first loading plate 21, respectively. The two side plates can limit the loading screw or the load sensor 9 to the middle part to prevent the loading screw or the load sensor from moving in the test process.
In some embodiments, the second loading portion 3 comprises a second loading plate. The pressure applied by the loading screw can be uniformly conducted to the sample through the second loading plate. Specifically, the material of the second loading plate is not particularly limited as long as it has a certain rigidity. The size of the second loading plate is not particularly limited, and the width thereof (width in the length direction of the tube of the test sample) is preferably larger than the length of the tube of the test sample, so that the clamping of the test sample by the loading part is more stable during the test.
In some embodiments, the second loading part 3 further includes a third side plate and a fourth side plate disposed at both sides of the second loading plate, respectively. The two side plates can limit the loading screw or the load sensor 9 to the middle part to prevent the loading screw or the load sensor from moving in the test process.
In some embodiments, the loading guide 5 comprises at least 4 guide rods 51 arranged in parallel; the loading support part 6 is provided with a guide hole; the guide rod 51 is inserted into the guide hole. The loading support part 6 can move up and down along the guide rod to adjust the loading position of the loading screw rod, so that the device is suitable for samples to be tested with different sizes.
In some embodiments, the loading support portion 6 may be a plate-shaped loading support plate, which is used for supporting the reverse acting force during the loading process, and the material thereof is not particularly limited, so long as it has a certain rigidity and prevents self-deformation during the loading process.
In some embodiments, the guiding and limiting part 7 includes an upper limiting part 71 and a lower limiting part 72 disposed on the guiding rod 51, the upper limiting part 71 is located above the loading support part 6, the lower limiting part 72 is located below the loading support part, and the upper limiting part 71 and the lower limiting part 72 may be adjusted in position along the guiding rod 51 and may be fixed with the guiding rod 51. After the upper and lower limiting parts are fixed with the guide rod, the upper limiting part limits the upward movement of the loading support part, and the lower limiting part limits the downward movement of the loading support part. Specifically, upper and lower spacing portion includes spacing portion main part, is equipped with the through-hole on upper and lower spacing portion main part, and the guide bar activity wears to locate in the through-hole, and upper and lower spacing portion main part is twisted tightly fixedly through the jackscrew that its side set up.
In some embodiments, the fiber reinforced plastic tube constant load long-term bending strain test device further comprises: a first rubber sheet 10 provided between the first loading unit 2 and the sample 4 to be tested; a second rubber sheet 11 provided between the second loading unit 3 and the sample 4 to be tested. The rubber sheet is directly contacted with the sample to play a role of buffering in the load loading process.
In some embodiments, the fiber reinforced plastic tube constant load long-term bending strain test device further comprises: and the screw limiting part 12 is used for fixing the positions of the loading screw 8 and the loading supporting part 6. The screw limiting part 12 can further limit the loading screw after loading is completed, so that the position change of the loading screw is prevented, the limiting effect of the loading screw can be relieved when the load required by testing changes, the loading screw is limited again after the position of the loading supporting part and the position of the loading screw are adjusted, and the stability of the load in the testing process is further ensured.
Specifically, the screw limiting portion 12 may be an adjusting nut that is screwed with the loading screw, and the adjusting nut is screwed with the loading support portion to limit the screw, so as to fix the position of the loading screw.
In some embodiments, the fiber reinforced plastic tube constant load long-term bending strain test device further comprises:
and a hand wheel 13 is connected with the top end of the loading screw rod 8. The hand wheel is manually rotated to enable the loading screw rod to move downwards so as to stabilize the loading load, and the operation is more convenient and labor-saving.
In some embodiments, the fiber reinforced plastic pipe constant load long-term bending strain test device may further comprise: the controller is electrically connected with the load sensor 9 and the communication module respectively. The load sensor can visualize the loading load value, and can realize remote check of the loading load in the test process.
In some embodiments, a load sensor 9 is provided between the load screw 8 and the first loading section 2, directly measuring the amount of load applied by the load screw.
In some embodiments, the fiber reinforced plastic tube constant load long-term bending strain test device further comprises: the loading plate 14, the loading plate 14 is a round steel plate, and the loading plate 14 is arranged at the bottom of the loading screw 8. The load applied by the loading screw can be uniformly conducted to the load sensor and the first loading part, so that the bottom end of the loading screw is prevented from damaging the load sensor.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (10)
1. A fiber reinforced plastic pipe constant load long-term bending strain test device, comprising:
a container for holding a liquid;
a first loading part arranged in the container;
the second loading part is arranged in the container and positioned below the first loading part, and a sample to be tested is arranged between the first loading part and the second loading part;
a loading guide portion provided in the container;
the loading support part is movably arranged on the loading guide part along the guide direction and is provided with a penetrating screw hole;
the guide limiting part is used for fixing the position of the loading supporting part on the loading guiding part;
the loading screw rod is penetrated into the screw hole on the loading support part and is in threaded connection with the screw hole; the bottom end of the loading screw rod is propped against the first loading part;
and the load sensor is used for detecting the load carried by the sample to be detected.
2. A fiber reinforced plastic pipe constant load long-term bending strain test apparatus according to claim 1, wherein:
the first loading portion includes a first loading plate.
3. A fiber reinforced plastic pipe constant load long-term bending strain test apparatus according to claim 2, wherein:
the first loading part further comprises a first side plate and a second side plate which are respectively arranged on two sides of the first loading plate.
4. A fiber reinforced plastic pipe constant load long-term bending strain test apparatus according to claim 1, wherein:
the second loading portion includes a second loading plate.
5. The fiber reinforced plastic pipe constant load long-term bending strain test device according to claim 4, wherein:
the second loading part further comprises a third side plate and a fourth side plate which are respectively arranged on two sides of the second loading plate.
6. A fiber reinforced plastic pipe constant load long-term bending strain test apparatus according to claim 1, wherein:
the loading guide part comprises at least 4 guide rods which are arranged in parallel; the loading support part is provided with a guide hole; the guide rod penetrates through the guide hole.
7. The fiber reinforced plastic pipe constant load long-term bending strain test device according to claim 6, wherein:
the guide limiting part comprises an upper limiting part and a lower limiting part which are arranged on the guide rod, the upper limiting part is positioned above the loading supporting part, the lower limiting part is positioned below the loading supporting part, and the upper limiting part and the lower limiting part can be positioned along the guide rod and fixed with the guide rod.
8. A fiber reinforced plastic pipe constant load long term bending strain test apparatus according to claim 1, further comprising:
the first rubber sheet is arranged between the first loading part and the sample to be tested;
the second rubber sheet is arranged between the second loading part and the sample to be tested.
9. A fiber reinforced plastic pipe constant load long term bending strain test apparatus according to claim 1, further comprising:
the screw limiting part is used for fixing the positions of the loading screw and the loading supporting part.
10. A fiber reinforced plastic pipe constant load long term bending strain test apparatus according to claim 1, further comprising:
and the hand wheel is connected with the top end of the loading screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321387448.4U CN220136882U (en) | 2023-06-02 | 2023-06-02 | Constant-load long-term bending strain test device for fiber reinforced plastic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321387448.4U CN220136882U (en) | 2023-06-02 | 2023-06-02 | Constant-load long-term bending strain test device for fiber reinforced plastic pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220136882U true CN220136882U (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321387448.4U Active CN220136882U (en) | 2023-06-02 | 2023-06-02 | Constant-load long-term bending strain test device for fiber reinforced plastic pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220136882U (en) |
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2023
- 2023-06-02 CN CN202321387448.4U patent/CN220136882U/en active Active
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