CN109632232A - A kind of column valve unloading impact test apparatus - Google Patents
A kind of column valve unloading impact test apparatus Download PDFInfo
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- CN109632232A CN109632232A CN201910014739.0A CN201910014739A CN109632232A CN 109632232 A CN109632232 A CN 109632232A CN 201910014739 A CN201910014739 A CN 201910014739A CN 109632232 A CN109632232 A CN 109632232A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
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Abstract
The present invention relates to a kind of column valves to unload impact test apparatus, and column is provided in column frame, and sliding is provided with column piston rod in column, forms plunger shaft between column piston rod bottom and column bottom；Column piston rod part is connect with impact cylinder piston rod end, and the setting of impact cylinder piston rod is impacted cylinder and be arranged at the top of column frame in impact cylinder, is impacted between cylinder piston rod and column frame roof and is slidably connected；Outside positioned at impact cylinder is provided with accumulating mechanism；The plunger shaft of column bottom is connect with the column check valve one end being arranged in outside column frame by the road, and the column check valve other end is connect through hydraulic control mechanism with the highly pressurised liquid storage pool for being provided with emulsion pumping source.The present invention has the characteristics that energy release gradient is controllable, energy duration is controllable, the column pilot operated check valve unloading impact Dynamic performance examination suitable for different structure type.
Description
Technical field
The present invention relates to a kind of hydraulic control one-way valve off-load impact property testing fields, unload especially with regard to a kind of column valve
Impact test apparatus.
Background technique
Due to special, complicated geological conditions, many uncertain safety factors are brought to coal working face, as vertical
External force, horizontal external and lateral force cause bracket to generate moderate finite deformation amount, therefore column unloading will not only exclude liquid itself
Compression, while to eliminate the deformation (the especially deformation of bracket) of bracket and top plate, this needs to be discharged a large amount of highly pressurised liquids, greatly
It measures highly pressurised liquid and passes through check valve, in a very short period of time fulminant energy release, the impact for necessarily causing system violent, vibration
It is dynamic.
It is φ by cylinder diameter according to the test method of Unloading Bursting of Electro-hydraulic Horizontal Valve in national standard GB25974.3 and EN1804.3
280 column is placed in rigid frame, carries out being loaded onto nominal pressure, is then supplied to the control mouth of check valve and upright post upper cavity
Liquid lays down the liquid in high pressure chest, with the fluctuation of pressure in uninstall process.This pilot system model is rigid, Gu
The frame for determining column does not deform substantially, and the amount of liquid that column pressurization needs is equal to the decrement of column cavity of resorption liquid, absorbs energy
Amount is few.As long as releasing the liquid for generating decrement when unloading, cavity pressure is eliminated under column, check valve in subsequent drop column movement
Into operating on low voltage state, by impacting to the unloading of type approval test, project disqualification rate is for statistical analysis, and discovery is few
The surge of unqualified phenomenon, only external check valve product is higher, respectively less than 115% nominal pressure.Check valve passes through
After 5000 durable type approval tests, practical to be used only several hundred times with a collection of check valve in underground coal mine, key reason is to mark
Experimental enviroment and actual condition in standard have certain gap；Pass through the unloading surge curve pair in laboratory with underground coal mine
Than hydraulic support off-load initial stage, there are huge energies under actual condition, and hydraulic system fierceness is caused to be shaken, and directly affected unidirectional
The service life of the Hydraulic Elements such as valve, safety valve.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of column valves to unload impact test apparatus, pass through accumulation of energy
Beater mechanism, flow speed adjusting gear and throttling set are realized and are rushed in the case where different-energy discharges gradient operating condition to check valve off-load
Pressure test is hit, is that the system of colliery industry check valve standard is revised for data supporting.
To achieve the above object, the present invention takes following technical scheme: a kind of column valve unloading impact test apparatus, packet
Include column frame, column, column piston rod, impact cylinder piston rod, impact cylinder, column check valve, hydraulic control mechanism and accumulating mechanism；
The column is provided in the column frame, sliding is provided with the column piston rod, the column piston in the column
Plunger shaft is formed between bar bottom and the column bottom；The column piston rod part and the impact cylinder piston rod end connect
It connects, the impact cylinder piston rod is arranged in the impact cylinder, and the impact cylinder is arranged at the top of the column frame, described
It is slidably connected between impact cylinder piston rod and the column frame roof；Outside positioned at the impact cylinder is provided with the accumulation of energy
Mechanism；The plunger shaft of the column bottom connects with the column check valve one end being arranged in outside the column frame by the road
It connects, the column check valve other end is connect through the hydraulic control mechanism with the highly pressurised liquid storage pool for being provided with emulsion pumping source.
Further, the column bottom side is provided with inlet, which connect with the column check valve.
Further, the accumulating mechanism includes flow speed regulation control mechanism and accumulator；The flow speed regulation control mechanism
It is connect with the accumulator, gradient is discharged by the energy that the flow speed regulation control mechanism adjusts the accumulator；The flow
Speed regulation control mechanism is symmetricly set on the outside of the casing wall of the impact cylinder.
Further, the accumulator is arranged on ground.
Further, the hydraulic control mechanism includes throttling set and solenoid directional control valve；At the column check valve liquid outlet with
The connection of described throttling set one end, the throttling set other end are connect with the solenoid directional control valve, the solenoid directional control valve and
Highly pressurised liquid storage pool connection with emulsion pumping source.
Further, the throttling set includes throttle valve and check valve；The throttle valve is connect with described check valve one end,
The check valve other end is connect with the column check valve and solenoid directional control valve.
The invention adopts the above technical scheme, which has the following advantages: 1, the present invention solves hydraulic support column
The problem that energy release time is short in Unloading Bursting of Electro-hydraulic Horizontal Valve performance test, continuous energy release is few.2, the present invention increases
Cylinder is impacted, pressure is applied by accumulation of energy beater mechanism, flow speed adjusting gear and throttling set column piston rod, simulates bracket
When check valve off-load, rack plate pressure, deformation of timbering influence the check valve surge of different flow, different pressures.It can
Dynamic is impacted in the unloading that different support deformation energy storage discharges under operating condition to meet the hydraulic control one-way valve of different flow, different pressures
Characteristic requirements.To sum up, the present invention is suitable for the column pilot operated check valve unloading impact Dynamic performance examination of different structure type.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention.
Specific embodiment
In the description of the present invention, it is to be understood that, the orientation of the instructions such as term " top ", " bottom " "inner", "outside"
Or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplification of the description, and
It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, therefore
It is not considered as limiting the invention.The present invention is described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, the present invention provides a kind of column valve unloading impact test apparatus, which discharges gradient can
Control, energy release duration are controllable.The present invention include column frame 1, column 2, column piston rod 3, impact cylinder piston rod 4,
Impact cylinder 5, column check valve 6, hydraulic control mechanism and accumulating mechanism.
Column frame 1 is provided with column 2, sliding setting in column 2 for simulating roof in column frame 1
There is column piston rod 3,3 bottom of column piston rod and column form plunger shaft between 2 bottom.3 top of column piston rod and impact
The connection of 4 end of cylinder piston rod, when simulating check valve unloading impact, shadow that roof pressure and deformation of timbering generate check valve
It rings；Impact the setting of cylinder piston rod 4 in impact cylinder 5, and impact the setting of cylinder 5 at the top of column frame 1, impact cylinder piston rod 4 with
It is slidably connected between 1 roof of column frame, piston structure is constituted by impact cylinder 5,1 roof of column frame and impact cylinder piston rod 4.
Outside positioned at impact cylinder 5 is provided with accumulating mechanism.2 bottom piston chamber side of column is provided with inlet 21, the inlet 21
It is connect by the road with 6 one end of column check valve being arranged in outside column frame 1,6 other end of column check valve is through hydraulic control mechanism
It is connect with the highly pressurised liquid storage pool for being provided with emulsion pumping source.
In use, the highly pressurised liquid that emulsion pumping source generates, the piston of column 2 is entered by hydraulic control mechanism and inlet 21
It is intracavitary, column piston rod 3 is moved upwards, and then impact cylinder piston rod 4 is pushed to move upwards, reaches the public affairs of column check valve 6
After claiming pressure, energy is stored for accumulating mechanism.Gradient is discharged according to predetermined energy, adjusts hydraulic control mechanism and accumulation of energy in real time
The amount of opening of mechanism；After opening accumulating mechanism, when carrying out unloading impact property test, according to determining energy release gradient and energy
It measures the sustained release time, the energy of accumulating mechanism storage is applied to the plunger shaft of impact cylinder 5, and then simulates set cap and top plate
The release of deformation；Impact cylinder piston rod 4 pushes column piston rod 3 to move downward, and the energy of release is made by impact cylinder piston rod 4
With on column piston rod 3, simulation roof and set cap deform downward energy；It is supplied to 6 control chamber of column check valve
Liquid opens column check valve 6, and a large amount of highly pressurised liquids continue through column check valve 6, after satisfaction releases energy, stops energy and releases
It puts, column check valve 6 enters the slow release stage, tests the pressure change feature in unloading process, completes impact test, and can
Surge changing rule and energy of the column check valve 6 in entire unloading process are recorded and analyzed by existing test macro
Discharge the changing rule of gradient.
In above-described embodiment, accumulating mechanism includes flow speed regulation control mechanism 7 and accumulator 8.Flow speed regulation control mechanism 7
It is connect with accumulator 8, gradient is discharged by the energy that flow speed regulation control mechanism 7 adjusts accumulator 8；And flow speed regulation control mechanism
7 are symmetricly set on the outside of the casing wall of impact cylinder 5, to guarantee to impact the uniform force in taxiing procedures of cylinder piston rod 4.Wherein, it stores
Energy device 8 is placed on ground, for providing power source for test, simulates bracket deformation energy storage.
In the various embodiments described above, hydraulic control mechanism includes throttling set 9 and solenoid directional control valve 10.6 liquid outlet of column check valve
Place connect with 9 one end of throttling set, and 9 other end of throttling set is connect with solenoid directional control valve 10, solenoid directional control valve 10 and is had newborn
Change the highly pressurised liquid storage pool connection in liquid pump source.
In a preferred embodiment, throttling set 9 discharges gradient for accurately adjusting energy comprising throttle valve 91
With check valve 92.Throttle valve 91 is connect with 92 one end of check valve, 92 other end of check valve and column check valve 6 and solenoid directional control valve
10 connections.
In use, discharging gradient after column check valve 6 reaches nominal pressure according to determining energy, adjusting accumulator 8
Volume, the blowing pressure and supercharging pressure, in real time adjust flow speed adjusting gear 6 and throttling set 9 amount of opening, to control column
6 off-load gradient of check valve simulates the bracket deformation rate of release when off-load of underground coal mine check valve.
To sum up, the test that impact can be unloaded according to GB25974.3 and EN1804 check valve, analyzes the hydraulic branch of underground coal mine
Actual condition when frame unloads, finds out the difference with laboratory test environment, for different flow, the fluid-control one-way of different pressures
Valve carries out a large amount of unloading impact tests in the different support of same working resistance, finds out release rule, the unloading punching of bracket deformation
Hit the changing rule and corresponding relationship between the two of pressure.
The present invention applies pressure by increasing impact cylinder 5, column piston rod 3, when simulating the off-load of bracket check valve, bracket
Roof pressure, deformation of timbering influence check valve surge；By to 8 exit amount of opening of accumulator and column check valve
The amount of opening structure adjusting of throttling set 9 at 6 liquid outlets controls 6 off-load gradient of column check valve, simulates underground coal mine check valve
Bracket deformation rate of release when off-load；Additionally by different accumulator volumes, different charging pressure of accumulator, different filling liquid pressures
The multiple combinations mode of power, difference actual condition when simulating hydraulic support off-load, can satisfy different flow, different pressures column
The testing requirement of check valve 6.
The present invention passes through the structure adjusting of flow speed regulation control mechanism 7 and throttling set 9, i.e., opens 8 exit of accumulator
The amount of opening structure adjusting of throttling set 9, controls 6 off-load gradient of column check valve at mouth amount and 6 liquid outlet of column check valve,
Simulate the bracket deformation rate of release when off-load of underground coal mine check valve.
The present invention can obtain roof pressure and branch by increasing impact cylinder 5 when simulation column check valve 6 unloads impact
Frame deforms the influence that column check valve 6 generates.
The various embodiments described above are merely to illustrate the present invention, and structure and size, setting position and the shape of each component are all can be with
It is varied, based on the technical solution of the present invention, the improvement and wait that all principles according to the present invention carry out individual part
With transformation, should not exclude except protection scope of the present invention.
Claims (6)
1. a kind of column valve unloads impact test apparatus, it is characterised in that: including column frame, column, column piston rod, impact
Cylinder piston rod, impact cylinder, column check valve, hydraulic control mechanism and accumulating mechanism；
The column is provided in the column frame, sliding is provided with the column piston rod, the column in the column
Plunger shaft is formed between piston rod bottom and the column bottom；The column piston rod part and the impact the cylinder piston rod end
Portion's connection, the impact cylinder piston rod are arranged in the impact cylinder, and the impact cylinder is arranged at the top of the column frame,
It is slidably connected between the impact cylinder piston rod and the column frame roof；It is provided with positioned at the outside of the impact cylinder described
Accumulating mechanism；The plunger shaft of the column bottom by the road with the column check valve one that is arranged in outside the column frame
End connection, the column check valve other end connect through the hydraulic control mechanism with the highly pressurised liquid storage pool for being provided with emulsion pumping source
It connects.
2. experimental rig as described in claim 1, it is characterised in that: the column bottom side is provided with inlet, the feed liquor
Mouth is connect with the column check valve.
3. experimental rig as described in claim 1, it is characterised in that: the accumulating mechanism includes flow speed regulation control mechanism and storage
It can device；The flow speed regulation control mechanism is connect with the accumulator, adjusts the accumulation of energy by the flow speed regulation control mechanism
The energy of device discharges gradient；The flow speed regulation control mechanism is symmetricly set on the outside of the casing wall of the impact cylinder.
4. experimental rig as claimed in claim 3, it is characterised in that: the accumulator is arranged on ground.
5. experimental rig as described in claim 1, it is characterised in that: the hydraulic control mechanism includes throttling set and electromagnetic switch
Valve；It is connect at the column check valve liquid outlet with described throttling set one end, the throttling set other end and the electromagnetism
Reversal valve connection, the solenoid directional control valve are connect with the highly pressurised liquid storage pool with emulsion pumping source.
6. experimental rig as claimed in claim 5, it is characterised in that: the throttling set includes throttle valve and check valve；It is described
Throttle valve is connect with described check valve one end, and the check valve other end is connect with the column check valve and solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014739.0A CN109632232B (en) | 2019-01-08 | 2019-01-08 | Upright post valve unloading impact test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910014739.0A CN109632232B (en) | 2019-01-08 | 2019-01-08 | Upright post valve unloading impact test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109632232A true CN109632232A (en) | 2019-04-16 |
| CN109632232B CN109632232B (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910014739.0A Active CN109632232B (en) | 2019-01-08 | 2019-01-08 | Upright post valve unloading impact test device |
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| Country | Link |
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| CN (1) | CN109632232B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110641852A (en) * | 2019-08-19 | 2020-01-03 | 煤炭科学技术研究院有限公司 | Device and method for preventing test liquid with ultra-large flow from splashing and recovering test liquid |
| CN112082723A (en) * | 2019-06-14 | 2020-12-15 | 浙江工业大学 | Impact testing machine |
| CN113532841A (en) * | 2020-04-21 | 2021-10-22 | 山东交通学院 | Water pressure simulation device for reliability test of sea valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112082723A (en) * | 2019-06-14 | 2020-12-15 | 浙江工业大学 | Impact testing machine |
| CN112082723B (en) * | 2019-06-14 | 2024-06-11 | 浙江工业大学 | Impact testing machine |
| CN110641852A (en) * | 2019-08-19 | 2020-01-03 | 煤炭科学技术研究院有限公司 | Device and method for preventing test liquid with ultra-large flow from splashing and recovering test liquid |
| CN113532841A (en) * | 2020-04-21 | 2021-10-22 | 山东交通学院 | Water pressure simulation device for reliability test of sea valve |
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| Publication number | Publication date |
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| CN109632232B (en) | 2020-12-29 |
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