CN213041627U - Plastic compression creep testing device - Google Patents
Plastic compression creep testing device Download PDFInfo
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- CN213041627U CN213041627U CN202022223932.6U CN202022223932U CN213041627U CN 213041627 U CN213041627 U CN 213041627U CN 202022223932 U CN202022223932 U CN 202022223932U CN 213041627 U CN213041627 U CN 213041627U
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Abstract
The utility model discloses a plastics compression creep testing arrangement, including load tray, load, elevating platform, lift base, lever support, lever, dipperstick, measurement support and balance weight, when the test, the accessible lever hangs the load tray to load by the load tray and exert pressure to the plastics sample, and calculate according to dipperstick and simple geometric proportion line segment, can reach the compression creep value of plastics. The utility model discloses the plastics compression creep test standard that can be applicable to the difference to simplify the creep test of plastics, reduce test cost, especially can realize the compression creep test of plastics under the corrosive environment, provide more accurate data reference for the research of plastics creep performance.
Description
Technical Field
The utility model relates to a compression creep test of plastics, it is very much related to a plastics compression creep testing arrangement.
Background
Plastics are common packaging materials and are usually tested for various properties before application, including static compression, dynamic compression, vibration transmission characteristics, compression creep characteristics, and the like. Compression creep is a process that plastics are subjected to compression deformation and even fracture under a specified load for a long time, is one of main damage forms of plastics for anticorrosion equipment, particularly plastic sealing elements, and seriously influences the use safety of the equipment. The plastic compression creep test is a test in which a plastic sample is compressively deformed under a constant pressure under a predetermined temperature and relative humidity condition, the compressive strain of the plastic sample is measured over time, and the initial deformation percentage and the compressive creep percentage of the plastic sample are calculated. The test criteria for testing the compression creep of plastics are: ASTM D2990, GB/T15048 and GB/T14745, etc. because the loading load that each standard required is different, the loading condition is different, the test sample size is different, corresponding test equipment can not be general, need to use a plurality of testing arrangement, and test operation is loaded down with trivial details, and the test cost is high.
The plastic has excellent corrosion resistance and adhesion resistance, and is commonly used for pure plastic equipment, liners or sealing elements of chemical anticorrosion equipment for storing strong corrosive media such as sulfuric acid, hydrochloric acid and the like. The magnitude of the stress and the corrosive environment in which the plastic is exposed are important factors affecting the creep characteristics of the plastic. At present, creep testing devices for plastics are mostly carried out in a non-corrosive environment (such as air), and the creep performance research reference value of the plastics for chemical anticorrosion equipment is low. Under the existing equipment conditions, usually testers put the plastic test in advance into a corrosive medium to be soaked for a certain time, and then perform creep performance test. However, in the practical application of plastics, with the gradual progress of compression creep, the gaps among the plastic molecules are gradually increased, so that corrosive media gradually permeate into the plastic. The compression creep of plastics and the gradual penetration of corrosive media into the interior of the plastics are synchronous and interacting dynamic processes. Therefore, the material compression creep research of the plastic and the plastic lining equipment needs to be carried out in a corrosive medium, and provides a more accurate data reference for the research of the creep property of the plastic.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a plastic compression creep testing arrangement can deal with different test standards, improves the adaptability of plastic compression creep test, can carry out the compression creep test of plastics in corrosive medium moreover, provides more accurate reference data for the research of plastic creep performance.
In order to achieve the above object, the present invention provides a plastic compression creep testing device, including: the device comprises a load tray, a load, a lifting platform, a lifting base, a lever bracket, a lever, a measuring scale, a measuring bracket and a balance weight;
the lifting base, the lever bracket and the measuring bracket are sequentially fixed on the base, and the center points of the lifting base, the lever bracket and the measuring bracket on the base are on the same straight line; wherein:
the lifting platform is used for placing a plastic sample, the lifting platform is movably connected with the lifting base, and the lifting platform is configured to be capable of moving up and down relative to the lifting base;
the lever is connected with the lever bracket, and the lever, the straight line and the lever bracket are coplanar;
the load is placed in the load tray, the load tray is arranged above the lifting platform, the suspension end of the load tray is fixed on the lever, and the bottom of the load tray is used for pressing against the plastic sample;
the measuring scale is fixed on the measuring bracket, the measuring scale and the load tray are respectively arranged at two opposite ends of the lever, and the measuring end of the measuring scale is abutted against the lever;
the balance weight is fixed on the lever, and the balance weight is arranged at one end, opposite to the load tray, of the lever.
Optionally, the device also comprises an anti-corrosion cup made of an anti-corrosion material and used for containing a corrosive medium; the anti-corrosion cup is used for being placed on the lifting platform; the plastic sample is placed in the anti-corrosion cup, and the liquid level of the corrosive medium 202 is not lower than the height of the plastic sample; and/or the material of the loading tray is a corrosion-resistant material.
Optionally, a contact surface between the bottom of the load tray and the plastic test sample is a first plane, an upper surface of the lifting table is a second plane, and the first plane is parallel to the second plane.
Optionally, still include the lift button, the lift button is fixed on the lift base, the lift button is used for controlling the reciprocating of elevating platform and opening and stop.
Optionally, the load is a weight, or the load is an object having a predetermined weight.
Optionally, the lifting platform comprises a cam mechanism, a link mechanism or a worm mechanism.
Optionally, the measuring scale is a dial indicator.
Optionally, the lever has a scale along its length.
The utility model provides a plastics compression creep testing arrangement equipment has following advantage:
the plastic compression creep testing device is suitable for plastic compression creep testing of plastics with different sizes and different load requirements according to different testing standards, does not need to use multiple devices, simplifies testing, and is simple in structure, low in manufacturing cost and convenient to operate in testing steps;
secondly, the plastic compression creep testing device can accurately control stress through weights, and the testing error is small;
and thirdly, the plastic compression creep testing device realizes the test of the plastic compression creep in a corrosive environment by additionally arranging the anti-corrosion cup, is suitable for the compression creep performance test of the plastic for chemical anti-corrosion equipment, and provides more accurate reference data for the research of the plastic creep performance.
Drawings
FIG. 1 is a schematic view of a plastic compression creep testing apparatus according to a preferred embodiment of the present invention applied to a non-corrosive condition;
fig. 2 is a schematic diagram of a plastic compression creep testing apparatus applied under corrosive conditions according to a preferred embodiment of the present invention.
Wherein the reference numerals are as follows:
101-a load pallet; 102-load; 103-a lifting platform; 104-a lifting base; 105-a base; 106-up-down button; 107-lever bracket; 108-a lever; 109-measuring the scale; 110-a measuring stand; 111-a counterweight; 201-corrosion prevention cup; 202-corrosive media; a-plastic test specimens.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of each component in actual implementation may be changed at will, and the layout of the components may be more complicated.
Furthermore, each embodiment described below has one or more technical features, which does not mean that all technical features of any embodiment need to be implemented simultaneously by a person using the present invention, or that all technical features of different embodiments can be implemented separately. In other words, in the implementation of the present invention, based on the disclosure of the present invention, and depending on design specifications or implementation requirements, a person skilled in the art can selectively implement some or all of the technical features of any embodiment, or selectively implement a combination of some or all of the technical features of a plurality of embodiments, thereby increasing the flexibility in implementing the present invention. In addition, as used in this specification, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
The utility model discloses a plastic compression creep testing arrangement, the experimental standard of having solved plastic compression creep is different, needs to use different testing arrangement's problem according to different standards. The plastic compression creep testing device can be suitable for a plurality of plastic compression creep testing standards (such as ASTM D2990, GB/T15048, GB/T14745 and the like), and can also realize compression creep tests of plastic samples with different sizes and different load requirements. Particularly, the plastic compression creep testing device can be carried out in a corrosive environment or a non-corrosive environment, and if the testing is carried out in the corrosive environment, the testing device plays a more important role in the research and analysis of the creep property of the plastic for chemical anti-corrosion equipment, and can provide more accurate data reference for the research of the creep property of the plastic.
The structure and usage of the plastic compression creep test device of the present invention will be further described with reference to the accompanying drawings and preferred embodiments.
Fig. 1 is a schematic diagram of a plastic compression creep testing apparatus according to a preferred embodiment of the present invention applied to a non-corrosive condition.
As shown in fig. 1, the present embodiment provides a plastic compression creep testing apparatus, which includes a load tray 101, a load 102, a lifting table 103, a lifting base 104, a base 105, a lever bracket 107, a lever 108, a measuring scale 109, a measuring bracket 110, and a counter weight 111. The lifting base 104, the lever support 107 and the measuring support 110 are sequentially fixed on the base 105, and the lifting base 104, the lever support 107 and the measuring support 110 are arranged on a straight line at the center point of the base 105. The elevating platform 103 is movably connected with the elevating base 104, so that the elevating platform 103 can move up and down relative to the elevating base 104, and the elevating platform 103 can be fixedly locked at any position of moving up and down. The lever 108 is rotatably connected to the lever bracket 107, and the lever 108, the straight line and the lever bracket 107 are coplanar. The load tray 101 is disposed above the elevating table 103, and a hanging end of the load tray 101 is fixed to the lever 108. The measuring scale 109 is fixed on the measuring bracket 110, the measuring end of the measuring scale 109 abuts on the lever 108, and the load tray 101 and the measuring scale 109 are respectively disposed at opposite ends of the lever 108. Further, a counter weight 111 is fixed to the lever 108, and the counter weight 111 is provided at an end of the lever 108 opposite to the load tray 101. The counterweight 111 serves to adjust the balance of the lever 108 before the test is started, so that the entire apparatus is in an initial state in which the load 102 is not normally disposed in the load tray 101. The function of the measuring scale 109 is to indirectly obtain the value of the compression creep of the plastic.
In actual testing, it is necessary to place the plastic specimen a on the lifting table 103 and below the load tray 101, and it is also necessary to place the load 102 in the load tray 101 and apply pressure to the plastic specimen a using the load tray 101, specifically, the bottom of the load tray 101 is pressed against the plastic specimen a. Here, it should be understood that for the plastic compression creep test, the test load is primarily the mass of load 102.
Further, the contact surface of the bottom of the load pallet 101 and the plastic test piece a is preferably a first plane, and the upper surface of the elevating table 103 is a second plane, and the first plane and the second plane are parallel to each other.
Furthermore, the plastic compression creep testing device preferably further comprises a lifting knob 106, the up-down movement and the start-stop of the lifting platform 103 can be controlled by the lifting knob 106, and the lifting knob 106 is arranged on the lifting base 104 and connected with the lifting platform 103. The control method of the lifting knob 106 of the present invention is not particularly limited, and may be electric or manual. The elevating platform 103 moves up and down with the elevating base 104 as a reference, and the structure of the elevating platform 103 according to the present invention may be realized by a cam mechanism, a link mechanism, a worm mechanism, or the like without any particular limitation.
The counter weight 111 may be one or two, and one counter weight may be provided at an end of the lever 108 opposite to the load tray 101 or two counter weights may be provided at both ends of the lever 108, respectively. The lever 108 may be an equal arm or an unequal arm, and is not particularly limited. In general practice, as shown in fig. 1, a counter weight 111 is provided and placed on the lever 108 at the end opposite the load tray 101.
Further, the present invention is not limited to the form of the load 102, and the load 102 may be a weight or an accurately weighed object (i.e., an object having a predetermined weight).
Further, the dipperstick 109 and the counter weight 111 set up at the same one end of lever 108, in addition, the utility model discloses do not do special restriction to the kind of dipperstick 109 yet, can be any measuring tool that can the accurate measurement size change. In this embodiment, the measuring ruler 109 may be a dial indicator. In the following description, a dial gauge is used as an illustration, but not as a limitation of the present invention.
Preferably, the lever 108 can be provided with scales along the length direction thereof, so that the proportion information can be quickly obtained in the subsequent plastic compression creep calculation, the measurement by using a ruler is not needed, and the calculation of the plastic compression creep result is facilitated.
Fig. 2 is a schematic diagram of a plastic compression creep testing apparatus according to a preferred embodiment of the present invention applied to corrosive conditions.
As shown in FIG. 2, the plastic compression creep test apparatus of the present embodiment preferably further comprises a corrosion prevention cup 201 for containing a corrosive medium 202. When the compression creep of the plastic to be tested in a corrosive environment needs to be tested, the plastic sample a is placed in the anti-corrosion cup 201, then the corrosive medium 202 is poured, the liquid level of the corrosive medium 202 is not lower than the height of the plastic sample a, and preferably, the liquid level of the corrosive medium 202 is equal to the height of the plastic sample a.
In practice, the corrosive medium 202 of the plastic compression creep test refers primarily to acids, such as sulfuric acid, hydrochloric acid, nitric acid, phosphoric acid, and the like.
Further, in a test under a corrosive condition, the corrosion-resistant cup 201 and the load tray 101 are made of corrosion-resistant materials, preferably, steel-frame plastics, fiber reinforced plastics, ceramics, glass, and the like.
The following further describes the usage of the plastic compression creep testing device of the present invention with reference to fig. 2 and the preferred embodiment, taking plastic in corrosive environment as an example.
The load tray 101 is first hung on the lever 108 by a hook, the balance weight 111 on the right end face of the lever 108 is adjusted to keep the apparatus in balance in the initial state, and the measuring tape 109 is zeroed and the measuring end of the measuring tape 109 is brought into contact with the lever 108.
Then, the plastic sample a is placed in the corrosion prevention cup 201, and the corrosive medium 202 is injected into the corrosion prevention cup 201 until the corrosive medium just passes over the upper surface of the plastic sample a.
Thereafter, the erosion prevention cup is placed on the elevating table 103, the elevating knob 106 is adjusted to elevate the elevating table 103 until the upper surface of the plastic sample a comes into contact with the bottom of the load tray 101, and thereafter the elevating knob 106 is fixed to keep the elevating table 103 still.
Thereafter, after the load 102 is placed in the load pallet 101 to the load required for the test, a creep test is performed in which the measuring end of the measuring ruler 109 is brought into contact with the lever 108 for obtaining creep data d of the plastic under the weight of the measured load 102.
Finally, the length u from the hook of the tray load 101 to the fulcrum of the lever 108 can be read out from the scale on the lever 108, the length v from the measuring point of the measuring scale 109 to the fulcrum of the lever 108 is measured, and the creep amount of the plastic sample a in the test is calculated to be ud/v.
It should be known that the utility model discloses a plastic compression creep testing arrangement can also test the compression creep of plastics sample under non-corrosive environment, and at this moment, only need get rid of the relevant part of anticorrosion cup 201 and corrosive medium 202, and the using-way is similar with the test procedure under the preceding corrosive conditions, and it is no longer repeated here.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention. Any modification or decoration made by a person of ordinary skill in the art according to the above disclosure is within the scope of the present invention.
Claims (8)
1. A plastic compression creep testing apparatus, comprising: the device comprises a load tray, a load, a lifting platform, a lifting base, a lever bracket, a lever, a measuring scale, a measuring bracket and a balance weight;
the lifting base, the lever bracket and the measuring bracket are sequentially fixed on the base, and the center points of the lifting base, the lever bracket and the measuring bracket on the base are on the same straight line; wherein:
the lifting platform is used for placing a plastic sample,
the lifting platform is movably connected with the lifting base, and the lifting platform is configured to be capable of moving up and down relative to the lifting base;
the lever is connected with the lever bracket, and the lever, the straight line and the lever bracket are coplanar;
the load is placed in the load tray, the load tray is arranged above the lifting platform, the suspension end of the load tray is fixed on the lever, and the bottom of the load tray is used for pressing against the plastic sample;
the measuring scale is fixed on the measuring bracket, the measuring scale and the load tray are respectively arranged at two opposite ends of the lever, and the measuring end of the measuring scale is abutted against the lever;
the balance weight is fixed on the lever, and the balance weight is arranged at one end, opposite to the load tray, of the lever.
2. The plastic compression creep testing apparatus of claim 1 further comprising a corrosion prevention cup made of a corrosion resistant material for containing a corrosive medium; the anti-corrosion cup is used for being placed on the lifting platform; the plastic sample is placed in the anti-corrosion cup, and the liquid level of the corrosive medium is not lower than the height of the plastic sample; and the material of the loading tray is a corrosion-resistant material.
3. The plastic compression creep testing apparatus according to claim 1 or 2, wherein the contact surface of the bottom of the load tray with the plastic test specimen is a first plane, the upper surface of the elevating table is a second plane, and the first plane is parallel to the second plane.
4. The plastic compression creep testing device according to claim 1 or 2, further comprising a lifting button fixed on the lifting base, wherein the lifting button is used for controlling the lifting platform to move up and down and start and stop.
5. The plastic compression creep test apparatus according to claim 1 or 2, wherein the load is a weight or the load is an object having a predetermined weight.
6. The plastic compression creep testing apparatus according to claim 1 or 2, wherein the elevating platform comprises a cam mechanism, a link mechanism or a worm mechanism.
7. A plastic compression creep testing device according to claim 1 or 2, characterized in that the measuring scale is a dial gauge.
8. The plastic compression creep testing device according to claim 1 or 2, wherein the lever has a scale along its length.
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|---|---|---|---|
| CN202022223932.6U CN213041627U (en) | 2020-09-30 | 2020-09-30 | Plastic compression creep testing device |
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| CN202022223932.6U CN213041627U (en) | 2020-09-30 | 2020-09-30 | Plastic compression creep testing device |
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| CN213041627U true CN213041627U (en) | 2021-04-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414405A (en) * | 2022-01-17 | 2022-04-29 | 中国矿业大学 | Vertical force applying equipment and method for open-pit mine rock in-situ test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414405A (en) * | 2022-01-17 | 2022-04-29 | 中国矿业大学 | Vertical force applying equipment and method for open-pit mine rock in-situ test |
| CN114414405B (en) * | 2022-01-17 | 2023-12-05 | 中国矿业大学 | Strip mine rock in-situ test vertical force application device and application method |
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