CN111044350A - Rigid impact protection device is prevented to impact test platform - Google Patents
Rigid impact protection device is prevented to impact test platform Download PDFInfo
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- CN111044350A CN111044350A CN201911285181.6A CN201911285181A CN111044350A CN 111044350 A CN111044350 A CN 111044350A CN 201911285181 A CN201911285181 A CN 201911285181A CN 111044350 A CN111044350 A CN 111044350A
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- plunger cylinder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/307—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a rigid impact prevention protection device for an impact test bed, which comprises a plunger cylinder barrel arranged on a base of the impact test bed, and a plunger cylinder piston moving up and down in the plunger cylinder barrel; an energy absorption mechanism is arranged in the plunger cylinder piston, an upper cover is arranged above the energy absorption mechanism, and a test member is supported above the upper cover; the energy absorption mechanism comprises a constant-resistance friction energy absorption circular tube and a constant-resistance friction energy absorption clamping device which are sequentially assembled from top to bottom, and is used for generating friction force to support the rigid impact of the upper cover above; the bottom of plunger jar cylinder is external a plurality of large-traffic relief valves for carry out the pressure release to the pressure that plunger jar piston transmitted to hydraulic oil, become the rigid impact that the upper cover received flexible impact. The invention utilizes the constant-resistance friction energy absorption device and the buffer oil cylinder to unload and absorb energy caused by rigid impact, prolongs the action time of the rigid impact, changes the rigid impact into flexible impact and achieves the purpose of protecting an impact test bed.
Description
Technical Field
The invention belongs to the technical field of safety protection of an impact test bed, and particularly relates to an anti-rigid impact protection device of the impact test bed.
Background
The hydraulic high-speed impact test bed can release huge energy in a very short time to generate high-pressure high-speed impact in the working process of an impact test, a test component or a device simulates a working environment by being stamped to test the feasibility of the design of the test component, a destructive rigid impact condition is likely to be generated in the impact test process, and when rigid impact occurs, a very large impact force can be generated instantaneously, and the impact force sometimes exceeds the strength limit of a structural member of the test bed to damage the impact test bed.
Disclosure of Invention
Based on the defects of the prior art, the invention solves the technical problem of providing the rigid impact protection device for the impact test bed, and through rigid-flexible conversion and energy release in two stages, the rigid impact energy of the impact test bed impact device under the condition exceeding the pressure limit of the impact test bed can be effectively protected, so that the test device can be effectively protected from being damaged.
In order to solve the technical problems, the invention is realized by the following technical scheme: the invention provides a rigid impact prevention protection device for an impact test bed, which comprises a plunger cylinder barrel arranged on a base of the impact test bed, and a plunger cylinder piston moving up and down in the plunger cylinder barrel;
an energy absorption mechanism is arranged in the plunger cylinder piston, an upper cover is arranged above the energy absorption mechanism, and a test member is supported above the upper cover;
the energy absorption mechanism comprises a constant-resistance friction energy absorption circular tube and a constant-resistance friction energy absorption clamping device which are sequentially assembled from top to bottom, and is used for generating friction force to support the rigid impact of the upper cover above;
the bottom of plunger jar cylinder is external a plurality of large-traffic relief valves for carry out the pressure release to the pressure that plunger jar piston transmitted to hydraulic oil, become the rigid impact that the upper cover received flexible impact.
Furthermore, an upper liquid injection hole and a lower liquid injection hole are respectively formed in the upper part and the bottom of the cylinder wall of the plunger cylinder barrel, and a plunger of the plunger cylinder moves in the vertical direction between the upper liquid injection hole and the lower liquid injection hole; and the upper liquid injection hole and the lower liquid injection hole are connected with the reversing valve and are used for injecting liquid into the upper cavity and the lower cavity of the plunger cylinder and controlling the displacement of the plunger cylinder piston.
Optionally, the constant-resistance friction energy-absorbing clamping device is a cylindrical steel pipe and is placed at the bottom of a cylindrical counter bore formed in a plunger cylinder piston, and an upper pipe orifice of the constant-resistance friction energy-absorbing clamping device is inwardly protruded and is assembled with a constant-resistance friction energy-absorbing circular pipe in an interference manner; the upper cover is assembled above the constant-resistance friction energy-absorbing circular tube and can move up and down in the cylindrical countersunk hole of the plunger cylinder piston.
Furthermore, a plunger cylinder bottom cover supporting ring and a plunger cylinder fixing ring are sequentially arranged at the bottom of the plunger cylinder barrel from top to bottom, the plunger cylinder bottom cover supporting ring is assembled on the plunger cylinder barrel to form a bottom support, and the plunger cylinder bottom cover is matched with the plunger cylinder bottom cover supporting ring and clamped with the plunger cylinder fixing ring; the plunger cylinder bottom cover is connected with the plunger cylinder bottom cover fixing ring through a screw and clamps the plunger cylinder bottom cover supporting ring.
Furthermore, the plunger cylinder fixing ring is of a circular ring structure, and the plunger cylinder bottom cover supporting ring is of a circular ring shape formed by three or four sections of circular structures.
Optionally, the plunger cylinder barrel is cylindrical, and a flange plate is arranged at the bottom of the plunger cylinder barrel and connected with the base of the impact test bed through bolts.
Furthermore, sealing devices are arranged at the contact positions of the plunger cylinder piston and the plunger cylinder bottom cover and the inner wall of the plunger cylinder barrel.
Therefore, the rigid impact protection device for the impact test bed has at least the following beneficial effects:
1. the rigid impact prevention protection device can effectively deal with the complex conditions of different rigid impacts and protect the impact test bed under the condition of loss as small as possible.
2. The constant-resistance friction energy absorption device and the safety valve can be selected under different requirements, and the energy absorption buffer device for various impact tests can be combined by selecting the constant-resistance friction energy absorption device and the safety valve.
3. Through the combination of the constant-resistance friction energy absorption device and the buffer oil cylinder, two safety defense lines are formed, and the impact test bed is more effectively protected.
4. The constant-resistance friction energy absorption device is quick in response, the safety valve of the buffer oil cylinder is opened with a certain delay, and when the energy is damaged greatly, the upper constant-resistance friction energy absorption device firstly moves downwards to absorb friction energy, so that time can be gained for opening the safety valve of the buffer oil cylinder.
5. The device is flexible and adjustable, and can be applied to other anti-collision devices needing energy absorption and buffering.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments, together with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a cross-sectional view of an impact test stand anti-rigid impact protection device of the present invention;
FIG. 2 is a bottom view of the impact test stand anti-rigid impact protection device of the present invention;
FIG. 3 is a schematic view of the impact test stand anti-rigid impact protection device of the present invention;
FIG. 4 is a schematic structural view of the impact test stand rigid impact protection device of the present invention under a normal working condition of the impact test stand;
FIG. 5 is a schematic structural view of the impact test bed rigid impact prevention protection device of the present invention beginning to absorb energy and buffer;
FIG. 6 is a schematic structural view of the impact test bed rigid impact prevention protection device of the invention for completely absorbing energy and yielding.
Wherein, 1, plunger cylinder fixing ring; 2. a safety valve interface; 3. a high-flow safety valve; 4. a plunger cylinder barrel; 5. a sealing device; 6. a plunger cylinder piston; 7. a constant-resistance friction energy-absorbing circular tube; 8. an upper cover; 9. a ring groove; 10. a constant-resistance friction energy-absorbing clamping device; 11. an upper liquid injection hole; 12. a lower pour hole; 13. a plunger cylinder bottom cover; 14. a plunger cylinder bottom cover support ring; 15. an impact test stand; 16. a rigid impact protection device; 17. and (4) testing the component.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which form a part of this specification, and which illustrate, by way of example, the principles of the invention. In the referenced drawings, the same or similar components in different drawings are denoted by the same reference numerals.
The invention relates to an energy-absorbing buffer device combining a constant-resistance friction energy-absorbing device and a buffer oil cylinder, as shown in figures 1 to 6, the rigid impact-proof protection device of an impact test bed mainly comprises a plunger cylinder fixing ring 1, a safety valve interface 2, a large-flow safety valve 3, a plunger cylinder barrel 4, a sealing device 5, a plunger cylinder piston 6, a constant-resistance friction energy-absorbing circular tube 7, an upper cover 8, a ring groove 9, a constant-resistance friction energy-absorbing clamping device 10, an upper liquid injection port 11, a lower liquid injection port 12, a plunger cylinder bottom cover 13 and a plunger cylinder bottom cover support ring 14, wherein the plunger cylinder bottom cover support ring 14 is assembled to the plunger cylinder barrel 4 to form a bottom support, and a circular groove is arranged inside the bottom of the plunger cylinder barrel 4 and matched with the plunger cylinder bottom cover support ring 14. The plunger cylinder bottom cover 13 is matched with the plunger cylinder bottom cover supporting ring 14 to be clamped with the plunger cylinder fixing ring 1, and the plunger cylinder piston 6 and the plunger cylinder barrel 4 are combined into a plunger cylinder. The upper cover 8, the constant-resistance friction energy-absorbing circular tube 7 and the constant-resistance friction energy-absorbing clamping device 10 are sequentially assembled into a plunger cylinder piston 6 hole, and the plunger cylinder barrel 4 is externally connected with a plurality of large-flow safety valves 3, and the structure diagrams are shown in fig. 1, 2 and 3.
The plunger cylinder barrel 4 is cylindrical, a flange plate is arranged at the bottom of the plunger cylinder barrel and connected with an impact test bed base through bolts, a plunger cylinder bottom cover supporting ring 14 and a sealing device 5 are installed above the bottom of the plunger cylinder barrel, a plurality of safety valve interfaces 2 are uniformly distributed at the bottom of the plunger cylinder barrel along the circumferential direction, a large-flow safety valve 3 is installed on each safety valve interface 2, an upper liquid injection hole 11 and a lower liquid injection hole 12 are formed in the cylinder barrel wall of the plunger cylinder barrel 4, and a plunger cylinder piston 6 moves in the vertical direction between the upper liquid injection hole 11 and the lower liquid injection hole 12. The upper and lower liquid injection holes are connected with a reversing valve to inject liquid into the upper and lower cavities of the plunger cylinder (buffer oil cylinder) and control the displacement of the plunger cylinder piston 6.
The sealing device 5 is arranged on the plunger cylinder bottom cover 13 and is contacted with the inner wall of the plunger cylinder barrel 4, and the plunger cylinder bottom cover 13 is connected with the plunger cylinder bottom cover fixing ring 1 through a screw and clamps the plunger cylinder bottom cover supporting ring 14. The plunger cylinder fixing ring 1 is in a ring shape, and the plunger cylinder bottom cover supporting ring 14 is in a ring shape formed by three or four sections of ring structures, so that the plunger cylinder bottom cover supporting ring is convenient to assemble.
The plunger cylinder piston 6 is provided with a ring groove 9 and a sealing device 5 arranged on the ring groove 9, the sealing device 5 is arranged on the plunger cylinder piston 6 and is contacted with the inner wall of the plunger cylinder barrel 4, and the sealing device 5 can adopt a sealing ring or other sealing elements. A cylindrical counter bore is formed above the bottom of the plunger cylinder piston 6 and used for assembling an energy absorption mechanism (constant-resistance friction energy absorption device) consisting of a constant-resistance friction energy absorption circular tube 7 and a constant-resistance friction energy absorption clamping device 10, the constant-resistance friction energy absorption clamping device 10 is a cylindrical steel tube and is arranged at the bottom of the counter bore, the tube orifice of the constant-resistance friction energy absorption circular tube 7 is inwards convex, and the constant-resistance friction energy absorption circular tube 7 and an upper cover 8 are sequentially assembled above the constant-resistance friction energy absorption clamping device. The constant-resistance friction energy-absorbing clamping device 10 is assembled with the constant-resistance friction energy-absorbing circular tube 7 in an interference fit mode. The upper cover 8 is placed on the constant-resistance friction energy-absorbing circular tube 7 and supports the upper test member 17. The middle of the upper cover 8 is provided with a threaded hole, so that the upper cover 8 can be conveniently taken and assembled.
The operation of the impact test stand rigid impact protection device of the present invention will be described with reference to fig. 1 to 6 in conjunction with the above description:
the ring flange of 4 bottoms on plunger cylinder is connected with the impact test platform base through the bolt, and test component 17 is placed to upper cover 8 top, through the impact device impact test component 17 of impact test platform 15 top, under the normal condition, when impact test platform 15 carries out the impact test, the device only plays supporting role, and hydraulic oil jack-up plunger cylinder piston cylinder 6, constant resistance friction energy-absorbing pipe 7 keeps the position unchangeable.
When the impact strength exceeds the design limit of an impact test bed, when rigid impact occurs, the impact force can be transmitted to the constant-resistance friction energy-absorbing circular tube 7 below the upper cover 8 through a test component, the friction force between the constant-resistance friction energy-absorbing circular tube 7 and the constant-resistance friction energy-absorbing clamping device 10 is not enough to support the rigid impact above, the impact force punches the constant-resistance friction energy-absorbing circular tube 7, the constant-resistance friction energy-absorbing circular tube 7 slides downwards to generate larger friction force with the constant-resistance friction energy-absorbing clamping device 10, the destructive energy generated by the rigid impact is converted into internal energy, and therefore the rigid impact time is prolonged to protect the impact device of the upper impact test bed and the base of the lower impact test bed.
Meanwhile, the impact force is transmitted to the plunger cylinder piston 6 along the constant-resistance friction energy-absorbing circular tube 7 and the constant-resistance friction energy-absorbing clamping device 10, the hydraulic oil pressure is sharply increased by transmitting the plunger cylinder piston 6 to hydraulic oil, the opening pressure value of the safety valves 3 is reached, the safety valves 3 are opened and pressure relief is carried out simultaneously, the limiting pressure is further increased, the plunger cylinder piston 6 is lowered, and the function of prolonging the time of impact, namely, the time of rigid impact into flexible impact is also achieved, as shown in fig. 5.
Through the rigid-flexible conversion and the energy release of the two stages, the rigid impact energy of the impact device of the impact test bed under the condition of exceeding the pressure limit of the impact device can be effectively protected, and the test device can be effectively protected from being damaged.
The protection device for preventing the rigid impact of the impact test bed utilizes the constant-resistance friction energy absorption device and the buffer oil cylinder to unload and absorb energy caused by the rigid impact, prolongs the action time of the rigid impact and changes the rigid impact into flexible impact. The device is arranged on a base of an impact test bed, and during impact test, high-speed high-pressure impact released by the impact test bed is transmitted to the device through a test component and then transmitted to the base of the test bed. If the impact force reaches the maximum value set by the system, the high-speed rigid impact in a short time is changed into long-time flexible impact through the unloading of the constant-resistance friction energy absorption device and the buffer oil cylinder, and the purpose of protecting the impact test bed is achieved.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. A rigid impact protection device for an impact test bed is characterized by comprising a plunger cylinder barrel (4) arranged on a base of the impact test bed, and a plunger cylinder piston (6) moving up and down in the plunger cylinder barrel (4);
an energy absorption mechanism is arranged in the plunger cylinder piston (6), an upper cover (8) is arranged above the energy absorption mechanism, and a test component (17) is supported above the upper cover (8);
the energy absorption mechanism comprises a constant-resistance friction energy absorption circular tube (7) and a constant-resistance friction energy absorption clamping device (10) which are sequentially assembled from top to bottom, and is used for generating friction force to support the rigid impact of an upper cover (8) above;
the bottom of plunger jar cylinder (4) is external a plurality of large-traffic relief valves (3) for the pressure that transmits to hydraulic oil to plunger jar piston (6) is carried out the pressure release, becomes the rigid impact that upper cover (8) received flexible impact.
2. The impact test bench rigid impact protection device as claimed in claim 1, characterized in that the upper part and the bottom part of the cylinder wall of the plunger cylinder barrel (4) are respectively provided with an upper liquid injection hole (11) and a lower liquid injection hole (12), and the plunger cylinder piston (6) moves in the vertical direction between the upper liquid injection hole (11) and the lower liquid injection hole (12);
and the upper liquid injection hole (11) and the lower liquid injection hole (12) are connected with a reversing valve and are used for injecting liquid into the upper cavity and the lower cavity of the plunger cylinder and controlling the displacement of a plunger cylinder piston (6).
3. The rigid impact protection device for the impact test bed is characterized in that the constant-resistance friction energy-absorbing clamping device (10) is a cylindrical steel pipe and is arranged at the bottom of a cylindrical counter bore formed in a plunger cylinder piston (6), and a constant-resistance friction energy-absorbing circular pipe (7) is convexly assembled in an upper pipe orifice of the constant-resistance friction energy-absorbing clamping device (10) in an interference manner;
the upper cover (8) is assembled above the constant-resistance friction energy-absorbing circular tube (7), and the upper cover (8) can move up and down in a cylindrical countersunk hole of the plunger cylinder piston (6).
4. The impact test bench rigid impact protection device as claimed in claim 1, wherein the plunger cylinder barrel (4) is provided with a plunger cylinder bottom cover (13), a plunger cylinder bottom cover support ring (14) and a plunger cylinder fixing ring (1) from top to bottom in sequence, the plunger cylinder bottom cover support ring (14) is assembled on the plunger cylinder barrel (4) to form a bottom support, and the plunger cylinder bottom cover (13) is matched with the plunger cylinder bottom cover support ring (14) to be clamped with the plunger cylinder fixing ring (1);
and the plunger cylinder bottom cover (13) is connected with the plunger cylinder bottom cover fixing ring (1) through a screw and clamps the plunger cylinder bottom cover supporting ring (14).
5. The impact test bench rigid impact protection device as claimed in claim 4, characterized in that the plunger cylinder fixing ring (1) is of a circular ring structure, and the plunger cylinder bottom cover supporting ring (14) is of a circular ring structure formed by three or four sections of circular structures.
6. An impact test bench rigid impact protection device as claimed in claim 1, characterised in that the plunger cylinder barrel (4) is cylindrical, has a flange at its bottom and is connected to the impact test bench base by means of bolts.
7. The impact test bench rigid impact protection device as claimed in claim 4, characterized in that the plunger cylinder piston (6) and the plunger cylinder bottom cover (13) are provided with sealing means (5) at the contact points with the inner wall of the plunger cylinder barrel (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911285181.6A CN111044350B (en) | 2019-12-13 | 2019-12-13 | Rigid impact protection device is prevented to impact test platform |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911285181.6A CN111044350B (en) | 2019-12-13 | 2019-12-13 | Rigid impact protection device is prevented to impact test platform |
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| Publication Number | Publication Date |
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| CN111044350A true CN111044350A (en) | 2020-04-21 |
| CN111044350B CN111044350B (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911285181.6A Active CN111044350B (en) | 2019-12-13 | 2019-12-13 | Rigid impact protection device is prevented to impact test platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117470639A (en) * | 2023-12-22 | 2024-01-30 | 深圳大学 | Energy absorption buffer device and method applied to dynamic true triaxial electromagnetic Hopkinson bar |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09113426A (en) * | 1995-10-16 | 1997-05-02 | Nissan Motor Co Ltd | Method and apparatus for absorbing energy in impact tensile tester |
| CN103344407A (en) * | 2013-07-02 | 2013-10-09 | 浙江吉利汽车研究院有限公司杭州分公司 | Energy absorption device |
| CN103557016A (en) * | 2013-11-08 | 2014-02-05 | 辽宁工程技术大学 | Multi-stage anti-impact supporting column |
| CN113175338A (en) * | 2021-06-10 | 2021-07-27 | 福州大学 | Stack type support with impact-resistant hydraulic prop and working method thereof |
-
2019
- 2019-12-13 CN CN201911285181.6A patent/CN111044350B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09113426A (en) * | 1995-10-16 | 1997-05-02 | Nissan Motor Co Ltd | Method and apparatus for absorbing energy in impact tensile tester |
| CN103344407A (en) * | 2013-07-02 | 2013-10-09 | 浙江吉利汽车研究院有限公司杭州分公司 | Energy absorption device |
| CN103557016A (en) * | 2013-11-08 | 2014-02-05 | 辽宁工程技术大学 | Multi-stage anti-impact supporting column |
| CN113175338A (en) * | 2021-06-10 | 2021-07-27 | 福州大学 | Stack type support with impact-resistant hydraulic prop and working method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117470639A (en) * | 2023-12-22 | 2024-01-30 | 深圳大学 | Energy absorption buffer device and method applied to dynamic true triaxial electromagnetic Hopkinson bar |
| CN117470639B (en) * | 2023-12-22 | 2024-04-09 | 深圳大学 | Energy absorption buffer device and method applied to dynamic true triaxial electromagnetic Hopkinson bar |
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| CN111044350B (en) | 2022-06-03 |
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