CN110082221A - A kind of true triaxial crushing test device - Google Patents
A kind of true triaxial crushing test device Download PDFInfo
- Publication number
- CN110082221A CN110082221A CN201910468350.3A CN201910468350A CN110082221A CN 110082221 A CN110082221 A CN 110082221A CN 201910468350 A CN201910468350 A CN 201910468350A CN 110082221 A CN110082221 A CN 110082221A
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- CN
- China
- Prior art keywords
- pressure break
- connector
- sample
- transfer tube
- test device
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Classifications
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Abstract
The invention discloses a kind of true triaxial crushing test devices, including charging assembly, pressure break pipe and injection pump, the pressure break pipe includes the first connector, transfer tube and the second connector of connection, first connector is embedded in the pressure break hole of sample, one end close to sample is fixedly connected with the first pressure break pipeline, the other end is detachably connected with switching tube end, the transfer tube other end is detachably connected with the second connector, second fitting end is fixedly connected with the second pressure break pipeline, and the second pressure break pipeline other end is connected to injection pump.Its installation and removal is convenient, can reuse, meet the needs of sample is simutaneously arranged pressure break pit shaft on different sides.
Description
Technical field
The present invention relates to actual triaxial testing apparatus, and in particular to a kind of true triaxial crushing test device.
Background technique
In conventional fracturing experiments, the pressure break analog simulation under the rock matrix mechanical condition of simulated formation can be carried out,
By directly rock sample internal sizes knot pressure split pipe realize fracture simulation, but it is such experiment often can only simulation rock bone
Frame stress structure is unable to the flow behavior of gas reservoir under formation conditions inside simulation rock sample.And i.e. enabled simulation rock
Stratum condition under the conditions of mechanics and seepage flow, but since pressure break pipe is glued with the pressure break hole in rock sample, in sample
The assembly time that different principal direction of stress are glued pressure break pipe is longer, cannot dismantle repeatedly, is difficult to simulate pressure break pit shaft in different masters
Fracturing experiments on stress direction, are difficult to realize under the conditions of pressure break seepage flow to the adjustable of pressure break pit shaft and optionally cloth
It sets.And the sealing performance when pressure line of injection pump is connect with pressure break pipe cannot also ensure.
Referring to Fig. 1 and Fig. 2, the sealing structure of existing pressure break pipeline shown in, including the existing pressure break being embedded in sample 1
Pipe, pipeline seal receptacle 9, cutting ferrule 10, support ring 11 and pressure cap 12 pass through high-pressure-resistant sealed glue between existing pressure break pipe and sample 1
Realize connection and sealing, the pipeline seal receptacle 9 is set on 1 side of sample, and middle part is axially arranged with the existing pressure break pipeline 13 of appearance and wears
The through-hole crossed, one end far from sample 1 are equipped with flaring, cutting ferrule 10 are equipped in flaring, using the expansion of pressure cap 12 and pipeline seal receptacle 6
Mouth lateral wall is threadedly coupled, and the support ring 11 is set between cutting ferrule 10 and pressure cap 12.Its working principle is that: pressure cap 12 is along pipeline
The flaring of seal receptacle 9 screws in, and squeezing support ring 11 moves it to 10 direction of cutting ferrule, and cutting ferrule 10 is under the action of support ring 11 to pipe
Linear sealing seat 9 is flared internal sealing cone and compresses and be forced to deform, and existing pressure break pipeline 13 is compressed in deformation process, is passed through
Pipeline seal receptacle 9, cutting ferrule 10, support ring 11 and pressure cap 12 collective effect, existing pressure break pipeline 13 be sealed in pipeline sealing
In seat 9, but it may cause the deformation of pressure break pipeline after the existing pressure break pipeline 13 of such sealing structure compression, after influencing pressure break pipeline
It is continuous to use.
CN108333050A discloses the secondary hydraulic fracturing test method of coal petrography under a kind of true triaxial state, pressure break pit shaft
Arrangement be: process blind hole in the predetermined face center of test specimen, and by steel liquid injection pipe be inserted into the blind hole and and its
Bonding, as simulation wellbore hole.CN103592186A discloses shale hydraulic fracturing damage development under a kind of true triaxial stress condition
The arrangement of device and experimental method, pressure break pipe is: pressure break pipe being put into the hydraulic pressure ceasma of test specimen, is then infused into hole
Enter curing agent and epoxy resin, allow pressure break pipe and test specimen tube wall firm pasting, reaches sealing effect.Consolidated by the way of splicing
Level pressure splits pipe, cannot dismantle repeatedly, is unfavorable for arranging on the different end faces of sample.
Summary of the invention
The object of the present invention is to provide a kind of true triaxial crushing test devices, and it is convenient to mount and dismount, and can repeat to make
With meeting the needs of sample is simutaneously arranged pressure break pit shaft on different sides.
True triaxial crushing test device of the present invention, including charging assembly, pressure break pipe and injection pump, the pressure break pipe
The first connector, transfer tube and the second connector including connection, first connector are embedded in the pressure break hole of sample, are inserted into sample
One end be fixedly connected with the first pressure break pipeline, the other end is detachably connected with switching tube end, and the transfer tube passes through load
The seal rubber sleeve of component, the other end are detachably connected with the second connector, and second fitting end is fixedly connected with the second pressure break
Pipeline, the second pressure break pipeline other end are connected to injection pump.
Further, first connector one end is equipped with heavy platform, is equipped in the heavy platform and switching tube end mating connection
Internal screw thread.
Further, one end that the transfer tube is connect with the first connector is equipped with the first sealing ring and guide collar.
Further, it is cased with traveling nut outside second connector, which is equipped with is cooperatively connected with switching tube end
Internal screw thread.
Further, the end that the transfer tube is connect with the second connector is equipped with the second sealing ring.
Further, the charging assembly includes seal rubber sleeve, load plate and the load bar being sheathed on outside sample, described close
The four direction dislocation all around of sealing set is disposed with load plate, is formed between the load plate for placing adding for seal rubber sleeve
Chamber is carried, load boom end is in contact with load plate far from the side of sample.
Further, sample side position corresponding with load bar is equipped with pressure break hole, is embedded in the pressure break hole
First connector.
Further, integrally formed with cylinder boss corresponding with pressure break hole site, the cylinder on the seal rubber sleeve
Boss is axially arranged with the first through hole being bonded with switching pipe outer wall.
Further, the load bar, which is equipped with, holds the second through-hole that the second pressure break pipeline passes through, and second through-hole is in L
Shape, an opening are located on the end face that load bar is contacted with load plate, and another opening is located at load bar side wall.
Further, first connector is potted in inside sample by sealant, the end connecting with transfer tube and examination
Sample surface flushes.
Compared with prior art, the present invention has the following advantages:
1, the present invention is by the way that the first connector to be embedded in sample, and transfer tube one end is detachably connected with the first connector, the other end
It is detachably connected with the second connector, is easily installed and dismantles, saved the human and material resources of installation, reduce to testing crew
Operation requires, while meeting the demand that sample is simutaneously arranged pressure break pit shaft on different sides, improves fracture simulation test
Efficiency.
2, the present invention by the position corresponding with load bar of sample side be arranged pressure break hole, when need to sample progress
When crushing test, the transfer tube for being connected with the second connector and the first connector are detachably connected, when some pressure break hole does not need to infuse
It when entering fracturing fluid, is cooperatively connected using plug and the first connector, sealing can be realized, installation and removal are convenient and efficient, realize
The arrangement of simulation wellbore hole is carried out in each stress direction of sample and is recycled, it being capable of more truly simulated formation situation.
3, the present invention passes through the setting of the first sealing ring and the second sealing ring, ensure that the first connector and the second connector and turns
Sealing performance between adapter tube, and since the first pressure break pipeline is fixedly connected with the end of the first connector, the second pressure break pipeline with
The end of second connector is fixedly connected, and ensure that the injection of fracturing fluid, is solved existing sealing structure and is caused to damage to pressure break pipeline
The problem of hurting.
Detailed description of the invention
Fig. 1 is existing sealed structural schematic diagram；
Fig. 2 is the partial enlarged view of Fig. 1；
Fig. 3 is structural schematic diagram of the invention；
Fig. 4 is the partial enlarged view of Fig. 3.
In figure, 1-sample, the 2-the first connector, the 21-the first pressure break pipeline, 3-transfer tubes, the 31-the first sealing ring,
32-guide collars, the 33-the second sealing ring, the 4-the second connector, the 41-the second pressure break pipeline, 42-traveling nuts, 5-sealants
Set, 51-cylinder boss, 52-first through hole, 6-load plates, 7-load bars, the 8-the second through-hole, 9-pipeline seal receptacles,
10-cutting ferrules, 11-support rings, 12-pressure caps, 13-existing pressure break pipelines.
Specific embodiment
It elaborates with reference to the accompanying drawing to the present invention.
Referring to Fig. 3 and Fig. 4, shown in true triaxial crushing test device, including charging assembly, pressure break pipe and injection pump, institute
It states the first connector 2, transfer tube 3 and the second connector 4, first connector 2 that pressure break pipe includes connection and is embedded in the pressure break of sample 1
Kong Zhong, one end of insertion sample 1 are welded with the first pressure break pipeline 21, and the other end is equipped with heavy platform, is equipped with and switching in the heavy platform
The internal screw thread that 3 end of pipe is cooperatively connected realizes being detachably connected for the first connector 2 and transfer tube 3.The transfer tube 3 passes through
The seal rubber sleeve 5 of charging assembly, the other end are connect with the second connector 4, are cased with traveling nut 42 outside second connector 4, the work
Dynamic nut 42 is equipped with the internal screw thread being cooperatively connected with 3 end of transfer tube, realizes transfer tube 3 and connects with the detachable of the second connector 4
It connects, 4 end of the second connector is welded with the second pressure break pipeline 41, and 41 other end of the second pressure break pipeline and injection pump connect
It is logical.The mode being connected through a screw thread connects the first connector 2, transfer tube 3 and the second connector 4, can be in due course according to specific requirements
The second pressure break pipeline is installed or removed, adjustable and optionally cloth under the conditions of pressure break seepage flow to pressure break pipe is realized
It sets, and installs or removes convenient, save the human and material resources of installation, reduce the operation requirement to testing crew, improve
True triaxial crushing test efficiency.
In order to guarantee the sealing performance of the connection structure, the is equipped in one end that the transfer tube 3 is connect with the first connector 2
One sealing ring 31 and guide collar 32, after transfer tube 3 is screwed into designated position along the heavy platform internal screw thread of the first connector 2, first is close
Seal 31 can effectively between sealing adaptor pipe 3 and the first connector 2 gap, avoid fracturing fluid leakage.In the transfer tube 3
The end connecting with the second connector 4 is equipped with the second sealing ring 33, when the screwing into along 3 end of transfer tube of traveling nut 42
When, it will the second sealing ring 33 is squeezed, its deformation expansion is made, sealing is played to the gap between transfer tube 3 and the second connector 4 and is made
With.The sealing structure will not directly act on the first pressure break pipeline 21 or the second pressure break pipeline 41, avoid pressure break pipeline by
Power deformation solves the problems, such as that existing sealing structure causes damage to pressure break pipeline.
The charging assembly includes seal rubber sleeve 5, load plate 6 and load bar 7, and the sample 1 is wrapped in seal rubber sleeve 5
It is interior, realize whole sealing status.The seal rubber sleeve 5 four direction dislocation all around is disposed with load plate 6, the load plate 6
Between form the LOADED CAVITY for placing seal rubber sleeve 5,7 end of load bar is in contact with load plate 6 far from the side of sample 1.
The load bar 7 is that sample 1 provides peripheral true triaxial on-load pressure, the peripheral load relation of simulated formation skeleton,
1 side of sample position corresponding with load bar 7 is equipped with pressure break hole, can be in each principal direction of stress of sample 1
Arrange that pressure break pipe, first connector 2 are potted in inside sample 1 by sealant, the end connecting with transfer tube 3 and sample
1 surface flushes.
In order to avoid the shaking of transfer tube 3, integrally formed with circle corresponding with pressure break hole site on the seal rubber sleeve 5
Column boss 51, the cylinder boss 51 are axially arranged with the first through hole 52 being bonded with 3 outer wall of transfer tube.
The load bar 7, which is equipped with, holds the second through-hole 8 that the second pressure break pipeline 41 passes through, and second through-hole 8 is L-shaped,
One opening is located on the end face that load bar 7 is contacted with load plate 6, and another opening is located at 7 side wall of load bar.Second through-hole 8 is set
The extraction convenient for the second pressure break pipeline 41 is set, the second pressure break pipeline 41 is connect with external injection pump.
When specific installation, the first connector 2 is welded into the first pressure break pipeline 21 far from one end of heavy platform first, it is each in sample 1
The first connector 2 with the first pressure break pipeline 21 is buried in pressure break hole on a principal direction of stress, the first connector 2 passes through sealant
It is potted in the pressure break hole of test 1, realizes being fixedly connected for the two.Then it according to the specific requirement of test, is answered in corresponding master
Power side is used up transfer tube 3 and screws in the heavy platform internal screw thread of the first connector 2, and not used first connector 2 uses and transfer tube 3
The identical seal plug of shape is sealed.Second pressure break pipeline 41 is welded on to the end of the second connector 4, the second connector 4 again
It is cased with traveling nut 42 outside, by the way that the second connector 4 and switching are realized in the end external screw thread cooperation of traveling nut 42 and transfer tube 3
Pipe 3 is fixedly connected, and the second pressure break pipeline 41 is drawn by the second through-hole 8 installed additional on bar 7 and connect with external injection pump, complete
At the installation of pressure break pipe.When after the completion of crushing test or needing replacing different pressure break holes, transfer tube 3 is screwed out by screw thread
, it is convenient to dismantle, and it is easy to operate, it can reuse.
Claims (10)
1. a kind of true triaxial crushing test device, it is characterised in that: including charging assembly, pressure break pipe and injection pump, the pressure break
Pipe includes the first connector (2), transfer tube (3) and the second connector (4) of connection, and first connector (2) is embedded in sample (1)
In pressure break hole, one end of insertion sample (1) is fixedly connected with the first pressure break pipeline (21), and the other end and transfer tube (3) end can
Dismantling connection, the transfer tube (3) pass through the seal rubber sleeve (5) of charging assembly, and the other end detachably connects with the second connector (4)
Connect, the second connector (4) end is fixedly connected with the second pressure break pipeline (41), the second pressure break pipeline (41) other end with
Injection pump connection.
2. true triaxial crushing test device according to claim 1, it is characterised in that: described first connector (2) one end is set
There is heavy platform, is equipped with the internal screw thread being cooperatively connected with transfer tube (3) end in the heavy platform.
3. true triaxial crushing test device according to claim 2, it is characterised in that: the transfer tube (3) connects with first
One end of head (2) connection is equipped with the first sealing ring (31) and guide collar (32).
4. true triaxial crushing test device according to claim 1 or 2, it is characterised in that: the second connector (4) housing
There are traveling nut (42), which is equipped with the internal screw thread being cooperatively connected with transfer tube (3) end.
5. true triaxial crushing test device according to claim 4, it is characterised in that: the transfer tube (3) connects with second
The end of head (4) connection is equipped with the second sealing ring (33).
6. true triaxial crushing test device according to claim 1 or 2, it is characterised in that: the charging assembly includes set
Seal rubber sleeve (5), load plate (6) and the load bar (7) external set on sample (1), the seal rubber sleeve (5) all around four
Direction dislocation is disposed with load plate (6), and the LOADED CAVITY for placing seal rubber sleeve (5) is formed between the load plate (6), is loaded
Bar (7) end is in contact with load plate (6) far from the side of sample (1).
7. true triaxial crushing test device according to claim 6, it is characterised in that: sample (1) side and load
The corresponding position of bar (7) is equipped with pressure break hole.
8. true triaxial crushing test device according to claim 7, it is characterised in that: one on the seal rubber sleeve (5)
Cylinder boss (51) corresponding with pressure break hole site is formed, the cylinder boss (51) is axially arranged with transfer tube (3) outside
The first through hole (52) of wall fitting.
9. true triaxial crushing test device according to claim 7, it is characterised in that: the load bar (7), which is equipped with, holds
The second through-hole (8) that second pressure break pipeline (41) passes through, second through-hole (8) is L-shaped, one opening be located at load bar (7) with
On the end face of load plate (6) contact, another opening is located at load bar (7) side wall.
10. true triaxial crushing test device according to claim 1 or 2, it is characterised in that: first connector (2) is logical
It crosses sealant and is potted in sample (1) inside, the end connecting with transfer tube (3) is flushed with sample (1) surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910468350.3A CN110082221A (en) | 2019-05-31 | 2019-05-31 | A kind of true triaxial crushing test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910468350.3A CN110082221A (en) | 2019-05-31 | 2019-05-31 | A kind of true triaxial crushing test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110082221A true CN110082221A (en) | 2019-08-02 |
Family
ID=67422871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910468350.3A Pending CN110082221A (en) | 2019-05-31 | 2019-05-31 | A kind of true triaxial crushing test device |
Country Status (1)
| Country | Link |
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| CN (1) | CN110082221A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111579353A (en) * | 2020-05-29 | 2020-08-25 | 贵州大学 | Hydraulic plug device integrating loading and liquid injection and test method |
| CN113588460A (en) * | 2021-07-27 | 2021-11-02 | 中南大学 | High-temperature triaxial SHPB device for rock and assembling method and testing method thereof |
| CN114199688A (en) * | 2021-12-08 | 2022-03-18 | 煤炭科学研究总院 | Triaxial loading test method for coal rock fracturing |
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| CN114199688A (en) * | 2021-12-08 | 2022-03-18 | 煤炭科学研究总院 | Triaxial loading test method for coal rock fracturing |
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Application publication date: 20190802 |