CN114112691A

CN114112691A - Material tensile testing machine capable of simulating fluid environment

Info

Publication number: CN114112691A
Application number: CN202111471431.2A
Authority: CN
Inventors: 林新生
Original assignee: Shanghai Bairoe Test Instrument Co ltd
Current assignee: Shanghai Bairoe Test Instrument Co ltd
Priority date: 2021-12-04
Filing date: 2021-12-04
Publication date: 2022-03-01
Anticipated expiration: 2041-12-04
Also published as: CN114112691B

Abstract

The utility model relates to a material tensile test machine that can simulate fluid environment, including frame and environment cauldron, the environment cauldron includes the kettle cover and the cauldron body, be equipped with first sealed sleeve and second sealed sleeve on the kettle cover, second sealed sleeve is sealed with the kettle cover, first sealed sleeve is sealed with second sealed sleeve, be equipped with the load pole in the first sealed sleeve, load pole and first sealed sleeve sliding connection, be equipped with the sealing rod in the second sealed sleeve, there is the interval between sealing rod and the second sealed sleeve, the sealing rod is connected with the load pole, the other end of sealing rod even has the loading pole, the one end that the loading pole is connected with the sealing rod is provided with load sensor, the loading pole runs through second sealed sleeve and kettle cover and extends to the cauldron internal, be equipped with centre gripping subassembly and lower centre gripping subassembly in the cauldron body, the loading pole is connected with last centre gripping subassembly, be equipped with the drive assembly who is used for driving the upward movement of load pole in the frame. The application has the effect of improving the defect that the tensile testing machine is influenced by the sealing friction force and the detection result is inaccurate.

Description

Material tensile testing machine capable of simulating fluid environment

Technical Field

The application relates to the field of material mechanical property detection equipment, in particular to a material tensile testing machine capable of simulating a fluid environment.

Background

The material tensile testing machine is a common material durability testing device, two ends of a sample are generally fixed by a clamp, and a driving device is started to apply tensile force to the sample until the sample is broken so as to detect the properties of the material, such as yield strength, tensile strength and the like.

In order to detect the mechanical properties of a material in a specific environment such as high temperature, high pressure, fluid medium, etc., it is necessary to simulate the environment of a test sample, and this is usually achieved by providing a container such as an environmental chamber on a tensile testing machine. However, such a tensile testing machine with a container presents certain technical difficulties in the measurement of the load to which the sample is subjected. In order to prevent the load cell from being damaged by the medium in the container, the load cell is usually arranged outside the container. Because the container needs to be sealed, the loading rod connected with the load sensor generates relative friction with the sealed position when moving, and the friction force generated at the sealed position can enable the load measured by the load sensor to be larger than the actual load applied on the sample, so that the detection result has larger deviation.

Therefore, the tensile testing machine in the above-mentioned related art has a drawback that the measurement result is inaccurate due to the influence of the seal friction force.

Disclosure of Invention

In order to overcome the defect that the tensile testing machine is influenced by sealing friction force and the detection result is inaccurate, the application provides the material tensile testing machine capable of simulating a fluid environment.

The application provides a material tensile testing machine that can simulate fluid environment adopts following technical scheme:

a material tensile testing machine capable of simulating a fluid environment comprises a rack and an environment kettle arranged on the rack, wherein the environment kettle comprises a kettle cover and a kettle body, the kettle cover and the kettle body are detachably connected, the kettle cover is provided with a first sealing sleeve and a second sealing sleeve, the second sealing sleeve is in sealing connection with the kettle cover, the first sealing sleeve is in sealing connection with the second sealing sleeve, a load rod is arranged in the first sealing sleeve, the load rod is in sliding connection with the first sealing sleeve, one end, far away from the second sealing sleeve, of the first sealing sleeve is sealed with the load rod, a sealing rod is arranged in the second sealing sleeve, a gap is arranged between the side wall of the sealing rod and the second sealing sleeve, one end of the sealing rod is connected with the load rod, the other end of the sealing rod is connected with the load rod, the loading rod with the one end that the sealing rod is connected is provided with load sensor, the other end of loading rod runs through the sealed sleeve of second with the kettle cover, and extend to the cauldron is internal, the internal last centre gripping subassembly and the lower centre gripping subassembly that is used for fixed sample that is equipped with of cauldron, the loading rod with it connects to go up the centre gripping subassembly, the centre gripping subassembly is located down go up centre gripping subassembly below, be equipped with in the frame and be used for driving the drive assembly of load rod rebound.

By adopting the technical scheme, the testing environment of the sample can be simulated by changing the fluid medium, the pressure intensity or the temperature in the kettle body, when the sample is detected, the driving assembly is started, the driving assembly drives the load rod to move upwards, and the load rod and the sealing system formed by the first sealing sleeve, the second sealing sleeve and the environment kettle slide relatively to each other, so that the sealing rod and the load rod are driven to move upwards, and therefore upward tensile force is applied to the sample.

Optionally, the kettle cover is provided with a mounting groove and a through groove, the mounting groove is communicated with the through groove to form a through groove in the vertical direction, the second sealing sleeve is connected in the mounting groove in a sealing manner, the loading rod penetrates through the through groove, and a gap is formed between the side wall of the loading rod and the side wall of the through groove.

By adopting the technical scheme, the possibility of relative friction between the loading rod and the kettle cover is reduced by the interval between the loading rod and the side wall of the groove, the defects that the tensile testing machine is influenced by sealing friction force and the detection result is inaccurate are further improved, and the measurement accuracy is improved.

Optionally, a space is provided between the side wall of the loading rod and the side wall of the second sealing sleeve.

Through adopting above-mentioned technical scheme, the interval between the lateral wall of loading rod and the second seal sleeve lateral wall has reduced the possibility that takes place relative friction between loading rod and the second seal sleeve, has further reduced the possibility that sealing friction force causes the influence to tensile test machine testing result.

Optionally, a guide belt is arranged on the side wall of the second sealing sleeve, and a gap is formed between the guide belt and the side wall of the loading rod.

Through adopting above-mentioned technical scheme, the setting of guidance tape has reduced the loading pole and has collided the possibility with the sealed sleeve lateral wall of second at the in-process that upwards removes, and the interval between guidance tape and the loading pole has reduced the possibility that loading pole and guidance tape take place relative friction, has further improved tensile test's accuracy.

Optionally, a third sealing sleeve is arranged between the first sealing sleeve and the second sealing sleeve, the third sealing sleeve is connected with the second sealing sleeve in a sealing manner, the third sealing sleeve is sleeved on the sealing rod, the third sealing sleeve is sealed with the sealing rod, and the sealing rod is connected with the third sealing sleeve in a sliding manner.

Through adopting above-mentioned technical scheme, the setting of third sealing sleeve has further improved tensile test machine's leakproofness, because third sealing sleeve is located between first sealing sleeve and the second sealing sleeve, and the friction between third sealing sleeve and the sealing rod does not cause the influence to load sensor's testing result.

Optionally, the first sealing sleeve includes first sealing and first container, first sealing is located first container top, the load pole with it is sealed between the first sealing, the lateral wall of load pole with there is the interval between the lateral wall of first container, the cover is equipped with the fourth sealing sleeve on the load pole, the fourth sealing sleeve is located in the first container, the fourth sealing sleeve with it is sealed between the first container.

Through adopting above-mentioned technical scheme, the sealing performance between first sealing sleeve and the load pole has further been improved in the setting of fourth sealing sleeve.

Optionally, the fourth sealing sleeve separates the space in the first sealing sleeve into an upper accommodating cavity and a lower accommodating cavity, a balance pipe is arranged on the environment kettle, one end of the balance pipe is communicated with the interior of the kettle body, and the other end of the balance pipe is communicated with the upper accommodating cavity.

Through adopting above-mentioned technical scheme, through the balance pipe with the internal portion of cauldron with last hold the chamber intercommunication, the internal fluid medium of cauldron gets into and holds the chamber on for the internal pressure of cauldron equals with the pressure that holds the intracavity on, thereby reduced the difference of the ascending and decurrent thrust that load pole and sealing rod received by a wide margin, reduced the axial load that the internal pressure of cauldron produced the sample after the sample installation, the impact force that tensile testing machine drive arrangement received when having reduced the sample fracture, prolonged the life of equipment.

Optionally, the sealing rod includes an upper connecting portion, an intermediate connecting portion and a lower connecting portion, the upper connecting portion is connected to the load rod, the lower connecting portion is connected to the load rod, the intermediate connecting portion is located between the upper connecting portion and the lower connecting portion, the intermediate connecting portion is sealed with the third sealing sleeve, and a circular area with the outer diameter of the intermediate connecting portion as a diameter is equal to the cross-sectional area of the fourth sealing sleeve.

By adopting the technical scheme, when the area of a circle with the diameter of the outer diameter of the bearing part is equal to the cross section area of the fourth sealing sleeve, the downward thrust of the medium in the upper accommodating cavity is equal to the upward thrust of the medium in the second sealing sleeve, and the stress of the load rod and the sealing rod is further balanced.

Optionally, a patch groove is formed in the sealing rod, the load sensor is located in the patch groove, the load sensor is connected with the top of the loading rod, and the loading rod is connected with the sealing rod in a sealing manner.

Through adopting above-mentioned technical scheme, set up load sensor in the paster inslot for load sensor and medium are isolated, have played the guard action to load sensor, have reduced the possibility that the medium produces the influence to load sensor in the environment cauldron, thereby have further improved the accuracy that tensile testing machine detected.

Optionally, the driving assembly comprises a motor, a screw rod, a nut block and a driving rod, the motor is arranged on the rack, the screw rod is connected with an output shaft of the motor, the nut block is connected with the screw rod in a threaded manner, the driving rod is connected with the rack in a sliding manner, one end of the driving rod is connected with the nut block, and the other end of the driving rod is connected with the load rod.

Through adopting above-mentioned technical scheme, during the starter motor, the output shaft of motor drives the lead screw and rotates, and the nut piece moves along the length direction of lead screw, drives the actuating lever and removes to provide ascending pulling force for the load bar.

In summary, the present application includes at least one of the following beneficial technical effects:

1. because the sealing is formed between the load rod and the first sealing sleeve, and the sealing rod and the load rod are positioned below the load rod, the load sensor connected between the sealing rod and the load rod can more accurately measure the load on the test sample, and the defects that the tensile testing machine is influenced by the sealing friction force and the detection result is inaccurate are overcome;

2. the inner part of the kettle body is communicated with the upper containing cavity through the balance pipe, and a fluid medium in the kettle body enters the upper containing cavity, so that the pressure in the kettle body is equal to the pressure in the upper containing cavity, the difference between upward and downward thrust force borne by the load rod and the sealing rod is greatly reduced, the axial load of the pressure in the kettle body on a sample after the sample is installed is reduced, the impact force borne by a driving device of a tensile testing machine when the sample is broken is reduced, and the service life of equipment is prolonged;

3. when the area of a circle taking the outer diameter of the middle bearing part as the diameter is equal to the cross section area of the fourth sealing sleeve, the downward thrust of the medium in the upper accommodating cavity is equal to the upward thrust of the medium in the second sealing sleeve, and the stress of the load rod and the sealing rod is further balanced.

Drawings

Fig. 1 is a schematic structural diagram of a material tensile testing machine capable of simulating a fluid environment according to an embodiment of the present application.

Fig. 2 is a top view of a material tensile testing machine capable of simulating a fluid environment according to an embodiment of the present application.

Fig. 3 is a sectional view 1 taken along line a-a of fig. 2.

Fig. 4 is an enlarged view at a in fig. 1.

Fig. 5 is a sectional view taken along line B-B in fig. 2.

Fig. 6 is an enlarged view at B in fig. 3.

Fig. 7 is an enlarged view at C in fig. 5.

Fig. 8 is a schematic structural diagram for embodying the lifting assembly in the embodiment of the present application.

Fig. 9 is a sectional view 2 taken along line a-a of fig. 2.

Fig. 10 is a sectional view 3 taken along line a-a of fig. 2.

Fig. 11 is an enlarged view at D in fig. 10.

Fig. 12 is an enlarged view at E in fig. 9.

Fig. 13 is an enlarged view at F in fig. 9.

Fig. 14 is a schematic structural diagram for embodying the balance pipe and the balance valve in the embodiment of the present application.

Fig. 15 is a schematic structural diagram for embodying a driving assembly according to an embodiment of the present application.

Fig. 16 is an enlarged view at G in fig. 3.

Description of reference numerals: 1. a frame; 101. a base; 102. a support bar; 1021. connecting blocks; 2. an environmental kettle; 201. a kettle cover; 2011. a first seal ring; 2012. mounting grooves; 2013. passing through the slot; 202. a kettle body; 2021. an environmental chamber; 203. a flow-through tube; 204. a flow-through valve; 3. a fixing assembly; 301. a fixed block; 302. fixing the rod; 303. connecting a kettle block; 4. a lifting assembly; 401. connecting a kettle rod; 402. a fastening block; 403. a lifting plate; 404. a lifting block; 405. an upper mounting plate; 406. a lower mounting plate; 407. an electric cylinder; 408. a slide plate; 409. a slide bar; 410. a rotating plate; 5. a seal assembly; 501. a first sealing sleeve; 5011. a first seal portion; 5012. a first accommodating portion; 5013. a first connection portion; 5014. a second seal ring; 5015. an upper receiving cavity; 5016. a lower receiving chamber; 502. a second sealing sleeve; 5021. a second connecting portion; 5022. a second accommodating portion; 5023. a second receiving part; 5024. a second support portion; 5025. a second mounting portion; 5026. a sixth seal ring; 5027. a guide belt; 503. a load lever; 5031. a fourth seal sleeve; 5032. a third seal ring; 5033. an upper communicating groove; 504. a sealing rod; 5041. an upper connecting portion; 5042. a middle bearing part; 5043. a lower connecting portion; 5044. a locking block; 5045. an upper connecting groove; 5046. a lower communicating groove; 5047. a patch slot; 5048. a lower connecting groove; 505. a third seal sleeve; 5051. a third connecting portion; 5052. a third seal portion; 5053. a fourth seal ring; 5054. a fifth seal ring; 6. a drive assembly; 601. a motor; 602. a machine base; 603. a connecting ring; 604. a screw rod; 605. a nut block; 606. a drive tube; 607. a drive column; 608. a drive rod; 7. a jacket; 701. a temperature control tube; 702. a temperature control valve; 8. a loading rod; 801. a seventh seal ring; 9. a load sensor; 901. a strain gauge; 902. a wire; 10. a balance tube; 11. a balance valve; 12. a sample holder; 121. a connecting rod block; 122. a cover connecting rod; 13. an upper clamping assembly; 131. loading a block; 132. an upper mounting block; 133. an upper clamping block; 1331. an upper clamping groove; 1332. an upper locking groove; 1333. an upper locking pin; 14. a lower clamping assembly; 141. a lower mounting rod; 142. a lower clamping block; 1421. a lower clamping groove; 1422. a lower locking groove; 1423. a lower locking pin; 15. a fixing plate; 16. an upper connecting plate; 17. a lower connecting plate; 18. a connecting rod; 19. a connecting sleeve; 20. and (4) a load frame.

Detailed Description

The present application is described in further detail below with reference to figures 1-16.

The embodiment of the application discloses a material tensile testing machine capable of simulating a fluid environment. Referring to fig. 1 and 2, a material tensile testing machine capable of simulating a fluid environment comprises a frame 1, an environment kettle 2, a fixing component 3, a lifting component 4, a sealing component 5 and a driving component 6, wherein the frame 1 comprises a base 101 and four supporting rods 102, the supporting rods 102 are vertically arranged at four corners of the base 101, and one end of each supporting rod 102 is fixed with the base 101 through a flange.

Referring to fig. 3, the environmental kettle 2 includes a kettle cover 201 and a kettle body 202, the kettle cover 201 is connected with the frame 1 through the fixing assembly 3, and the kettle body 202 is connected with the frame 1 through the lifting assembly 4.

Referring to fig. 1 and 4, four connecting blocks 1021 are arranged on the supporting rods 102, two supporting rods 102 located on the same side of the base 101 are taken as a group, two connecting blocks 1021 are arranged on each group of supporting rods 102, and each connecting block 1021 is fixedly connected with two supporting rods 102 in the same group. Two connecting blocks 1021 connected with the same group of supporting rods 102 are arranged in the vertical direction, wherein one connecting block 1021 is positioned at the top of the supporting rods 102, and an interval is arranged between the two connecting blocks 1021.

Referring to fig. 4 and 5, the fixing assemblies 3 are provided in two sets, the fixing assemblies 3 are located between the two sets of support rods 102, and each set of support rods 102 is provided with one set of fixing assemblies 3. The fixing assembly 3 comprises two fixing blocks 301 and two fixing rods 302, one fixing block 301 is fixedly connected to each connecting block 1021, and the fixing block 301 is located on one side of the connecting block 1021, which is close to the other group of support rods 102. The fixing rods 302 are vertically arranged between the two fixing blocks 301 in the same group, two ends of each fixing rod 302 are fixedly connected with the fixing blocks 301, and an interval is formed between the two fixing rods 302 in the same group.

Referring to fig. 6 and 7, in each set of fixing assemblies 3, the bottom of the lower fixing block 301 is fixedly connected with a kettle connecting block 303, the kettle connecting block 303 is connected with the kettle cover 201 through a bolt, and the kettle connecting blocks 303 are located on two sides of the kettle cover 201. Kettle cover 201 passes through the bolt fastening on the cauldron body 202, and two first sealing washer 2011 of kettle cover 201's bottom fixedly connected with have the interval between two first sealing washer 2011. The axis of the first seal ring 2011 coincides with the axis of the kettle body 202, and the side wall of the first seal ring 2011 abuts against the kettle body 202.

Referring to fig. 8, the lifting assembly 4 comprises a kettle connecting rod 401, a fastening block 402, a lifting plate 403, a lifting block 404, an upper mounting plate 405, a lower mounting plate 406, an electric cylinder 407, a sliding plate 408 and a sliding rod 409, wherein the kettle connecting rod 401 is fixedly connected to the bottom of the kettle body 202, and the axis of the kettle connecting rod 401 coincides with the axis of the kettle body 202. The lifting plate 403 is horizontally arranged, the kettle connecting rod 401 is positioned at one side of the lifting plate 403, and the kettle connecting rod 401 penetrates through the lifting plate 403. The fastening block 402 is sleeved on the kettle connecting rod 401, the fastening block 402 is fixedly connected with the kettle connecting rod 401, and the fastening block 402 is fixed on the lifting plate 403 through bolts. The lifting block 404 is located on one side of the lifting plate 403 far away from the fastening block 402, the lifting block 404 is fixedly connected to the bottom of the lifting plate 403, one supporting rod 102 penetrates through the lifting plate 403 and extends downwards to penetrate through the lifting block 404, the lifting block 404 is slidably connected with the supporting rod 102, and the lifting plate 403 is slidably connected with the supporting rod 102.

Referring to fig. 8, the lower mounting plate 406 is located above the lifting plate 403, the lower mounting plate 406 is sleeved on the two support rods 102 in the same group, and the lower mounting plate 406 is slidably connected to the support rods 102. The upper mounting plate 405 is located above the lower mounting plate 406, the upper mounting plate is located between the two connecting blocks 1021 in the same group, the upper mounting plate 405 is sleeved on the two supporting rods 102 in the same group, and the upper mounting plate 405 is fixedly connected with the supporting rods 102. The electric cylinder 407 is vertically arranged between the upper mounting plate 405 and the lower mounting plate 406, and the top of the electric cylinder 407 is rotatably connected to the bottom of the upper mounting plate 405. The lower mounting plate 406 is fixedly connected with a rotating plate 410, the rotating plate 410 is vertically arranged, and a piston rod of the electric cylinder 407 is rotatably connected to the rotating plate 410.

Referring to fig. 8, a sliding plate 408 is disposed between the upper mounting plate 405 and the lower mounting plate 406, a support rod 102 penetrates the sliding plate 408, and the sliding plate 408 is slidably connected to the support rod 102. The pole 409 that slides is equipped with two, and the pole 409 that slides vertically sets up between board 408 and the lifter plate 403 that slides, and two slide between the pole 409 that slides have the interval. One end of the sliding rod 409 is fixedly connected with the sliding plate 408, and the other end of the sliding rod 409 is fixedly connected with the lifting plate 403.

Referring to fig. 8 and 9, a jacket 7 is coaxially sleeved on the kettle body 202, and the jacket 7 is fixedly connected with the kettle body 202. Two temperature control tubes 701 are arranged on the jacket 7, and a space is arranged between the two temperature control tubes 701. Temperature control tube 701 is fixedly connected to jacket 7, the interior of temperature control tube 701 is communicated with the interior of jacket 7, and temperature control valve 702 is fixedly connected to temperature control tube 701. The temperature in the autoclave body 202 can be controlled by injecting a liquid or gas into the jacket 7 through the temperature control pipe 701.

Referring to fig. 8 and 9, an environmental chamber 2021 is formed in the autoclave body 202, and the environmental chamber 2021 is opened upward. A plurality of circulation pipes 203 are fixedly connected to the kettle cover 201, the circulation pipes 203 are fixedly connected to the kettle cover 201, one ends of the circulation pipes 203 penetrate through the kettle cover 201 and extend into the kettle body 202, and the insides of the circulation pipes 203 are communicated with the environment cavity 2021. In this embodiment, there are two circulation pipes 203, and the medium can be input into or output from the tank 202 through the circulation pipes 203. The circulation pipe 203 is fixedly connected with a circulation valve 204, and the circulation valve 204 is positioned outside the environmental kettle 2.

Referring to fig. 8 and 10, the seal assembly 5 includes a first seal sleeve 501, a second seal sleeve 502, a load bar 503, and a seal bar 504, the first seal sleeve 501 being located above the second seal sleeve 502, and a third seal sleeve 505 being disposed between the first seal sleeve 501 and the second seal sleeve 502. The first seal sleeve 501, the second seal sleeve 502, and the third seal sleeve 505 are coaxially arranged, the inside of the first seal sleeve 501 communicates with the inside of the third seal sleeve 505, and the inside of the third seal sleeve 505 communicates with the inside of the second seal sleeve 502.

Referring to fig. 11, the first sealing sleeve 501 includes a first sealing portion 5011, a first housing portion 5012, and a first connection portion 5013, the first sealing portion 5011 being located above the first connection portion 5013, the first housing portion 5012 being located between the first sealing portion 5011 and the first connection portion 5013. The first sealing portion 5011 is integrally formed with the first housing portion 5012, and the first housing portion 5012 is integrally formed with the first connecting portion 5013. The first sealing portion 5011, the first housing portion 5012, and the first connection portion 5013 are coaxially disposed, the first sealing portion 5011 has an outer diameter equal to that of the first housing portion 5012, and the first connection portion 5013 has an outer diameter larger than that of the first housing portion 5012. The first connecting portion 5013 has an inner diameter equal to that of the first housing portion 5012, and the first sealing portion 5011 has an inner diameter smaller than that of the first housing portion 5012.

Referring to fig. 10 and 11, a load bar 503 is located within first sealing sleeve 501, and the top of load bar 503 is located outside first sealing sleeve 501. The outer diameter of the load lever 503 is smaller than the inner diameter of the first housing portion 5012, the side wall of the load lever 503 abuts against the inner wall of the first sealing portion 5011, and the load lever 503 is slidably coupled to the first sealing portion 5011. The load rod 503 is sleeved with a plurality of second sealing rings 5014, the second sealing rings 5014 are abutted against the side wall of the load rod 503, the second sealing rings 5014 are embedded in the inner wall of the first sealing part 5011, and the second sealing rings 5014 are fixedly connected with the first sealing part 5011. A plurality of second seal rings 5014 are arranged along the axial direction of the first seal sleeve 501, and a space is provided between two adjacent second seal rings 5014.

Referring to fig. 11, a fourth sealing sleeve 5031 is coaxially sleeved on the load rod 503, and the fourth sealing sleeve 5031 is integrally formed with the load rod 503. The fourth sealing sleeve 5031 is positioned within the first housing portion 5012 such that the outer wall of the fourth sealing sleeve 5031 abuts the inner wall of the first housing portion 5012. A plurality of third sealing rings 5032 are sleeved on the fourth sealing sleeve 5031, the third sealing rings 5032 are embedded in the outer wall of the fourth sealing sleeve 5031, the third sealing rings 5032 are fixedly connected with the fourth sealing sleeve 5031, and the side wall of the third sealing rings 5032 abuts against the inner wall of the first accommodating part 5012. A plurality of third seal rings 5032 are arranged along the axial direction of the first seal sleeve 501, and a space is provided between two adjacent third seal rings 5032.

Referring to fig. 11, the third seal sleeve 505 includes a third connection portion 5051 and a third seal portion 5052, the third connection portion 5051 being coaxially disposed with the third seal portion 5052, the third connection portion 5051 being integrally formed with the third seal portion 5052. The inner diameter of the third connection portion 5051 is equal to the inner diameter of the third seal portion 5052, and the inner diameter of the third connection portion 5051 is smaller than the inner diameter of the first connection portion 5013. The outer diameter of the third connection portion 5051 is equal to the outer diameter of the first connection portion 5013, and the outer diameter of the third seal portion 5052 is smaller than the outer diameter of the third connection portion 5051. The first connection portion 5013 is connected to the third connection portion 5051 by a bolt.

Referring to fig. 11, the third seal 5052 is located within the second seal sleeve 502 with the outer wall of the third seal 5052 abutting the inner wall of the second seal sleeve 502. A plurality of fourth sealing rings 5053 are sleeved on the third sealing portion 5052, the fourth sealing rings 5053 are embedded in the outer wall of the third sealing portion 5052, the fourth sealing rings 5053 are fixedly connected with the third sealing portion 5052, and the side wall of the fourth sealing ring 5053 abuts against the inner wall of the second sealing sleeve 502. A plurality of fourth seal rings 5053 are arranged along the axial direction of the third seal sleeve 505, and a space is provided between adjacent fourth seal rings 5053.

Referring to fig. 11, the seal rod 504 is coaxially disposed within the second seal sleeve 502, with one end of the seal rod 504 extending upwardly into the first housing portion 5012, and the seal rod 504 is threadedly coupled to one end of the load rod 503. The side wall of the sealing rod 504 abuts against the inner wall of the third sealing sleeve 505, and the sealing rod 504 is slidably connected with the third sealing sleeve 505. A plurality of fifth sealing rings 5054 are coaxially sleeved on the sealing rod 504, the fifth sealing rings 5054 are embedded in the inner wall of the third sealing sleeve 505, the fifth sealing rings 5054 are fixedly connected with the third sealing sleeve 505, and the side wall of the fifth sealing ring 5054 abuts against the side wall of the sealing rod 504. A plurality of fifth seal rings 5054 are arranged along the axial direction of the third seal sleeve 505, and a space is provided between adjacent fifth seal rings 5054.

Referring to fig. 11 and 12, the second sealing sleeve 502 includes a second connecting portion 5021, a second receiving portion 5022, a second receiving portion 5023, a second supporting portion 5024 and a second mounting portion 5025, the second connecting portion 5021 is sleeved outside the third sealing portion 5052, an inner wall of the second connecting portion 5021 abuts against an outer wall of the third sealing portion 5052, and the fourth sealing ring 5053 is located in the second connecting portion 5021. The second connection portion 5021 has an outer diameter equal to that of the third connection portion 5051, and the second connection portion 5021 is fixed to the third connection portion 5051 by a bolt.

Referring to fig. 12, the second receiving portion 5022 is coaxially disposed below the second connecting portion 5021, the second receiving portion 5022 and the second connecting portion 5021 are integrally formed, the outer diameter of the second receiving portion 5022 is smaller than the outer diameter of the second connecting portion 5021, and the inner diameter of the second receiving portion 5022 is equal to the inner diameter of the second connecting portion 5021. The second receiving portion 5023 is coaxially disposed below the second receiving portion 5022, the second receiving portion 5023 and the second receiving portion 5022 are integrally formed, the outer diameter of the second receiving portion 5023 is equal to the outer diameter of the second receiving portion 5022, and the inner diameter of the second receiving portion 5023 is smaller than the inner diameter of the second receiving portion 5022.

Referring to fig. 12, the second supporting portion 5024 is coaxially disposed below the second receptacle 5023, the second supporting portion 5024 and the second receptacle 5023 are integrally formed, the outer diameter of the second supporting portion 5024 is smaller than the outer diameter of the second receptacle 5023, and the inner diameter of the second supporting portion 5024 is smaller than the inner diameter of the second receptacle 5023. The bottom of the second supporting part 5024 is abutted against the top of the kettle cover 201, and the second sealing sleeve 502 is coaxially arranged with the kettle cover 201.

Referring to fig. 12, the second mounting portion 5025 is coaxially disposed below the second supporting portion 5024, the second mounting portion 5025 and the second supporting portion 5024 are integrally formed, the outer diameter of the second mounting portion 5025 is smaller than the outer diameter of the second supporting portion 5024, and the inner diameter of the second mounting portion 5025 is equal to the inner diameter of the second supporting portion 5024. The mounting groove 2012 is opened on the kettle cover 201, the opening of the mounting groove 2012 is upward, the side wall of the mounting groove 2012 is threaded, and the second mounting part 5025 is threaded in the mounting groove 2012. A sixth sealing ring 5026 is coaxially sleeved on the second mounting part 5025, the sixth sealing ring 5026 is fixedly connected with the second mounting part 5025, and the side wall of the sixth sealing ring 5026 is abutted against the side wall of the mounting groove 2012.

Referring to fig. 11 and 12, the sealing rod 504 includes an upper connecting portion 5041, a middle socket portion 5042, and a lower connecting portion 5043, the upper connecting portion 5041 is coaxially disposed above the middle socket portion 5042, and the upper connecting portion 5041 is integrally formed with the middle socket portion 5042. The upper connection portion 5041 is located in the first seal sleeve 501, and the upper connection portion 5041 is screwed to one end of the load rod 503. The top of the middle socket 5042 is located within the third seal sleeve 505, one end of the middle socket 5042 extends downwardly into the second receptacle 5022, and the side wall of the middle socket 5042 abuts the fifth seal ring 5054.

Referring to fig. 12, the lower connecting portion 5043 is coaxially disposed below the intermediate receiving portion 5042, the lower connecting portion 5043 is integrally formed with the intermediate receiving portion 5042, and the lower connecting portion 5043 has an outer diameter larger than that of the intermediate receiving portion 5042. The lower connecting part 5043 is positioned in the second receiving part 5022, and the second receiving part 5022 has an inner diameter greater than an outer diameter of the lower connecting part 5043. The second sealing sleeve 502 is coaxially provided with a loading rod 8, one end of the loading rod 8 penetrates through the lower connecting portion 5043, and the loading rod 8 is fixedly connected with the lower connecting portion 5043. The loading lever 8 is screw-coupled with a locking block 5044, the locking block 5044 is positioned in the second receiving portion 5022, the top of the locking block 5044 abuts against the bottom of the lower connecting portion 5043, and a space is provided between the sidewall of the locking block 5044 and the sidewall of the second receiving portion 5022.

Referring to fig. 11 and 12, the load beam 503 is provided with an upper communication groove 5033, the upper communication groove 5033 is a vertical through groove, and an axis of the upper communication groove 5033 coincides with an axis of the load beam 503. The upper connecting portion 5041 is provided with an upper connecting groove 5045, the upper connecting groove 5045 is a vertical through groove, the upper connecting groove 5045 is communicated with the upper connecting groove 5033, the axis of the upper connecting groove 5045 is overlapped with the axis of the upper connecting groove 5033, the side wall of the upper connecting groove 5045 is provided with a screw, and one end of the load rod 503 is screwed into the upper connecting groove 5045.

Referring to fig. 11 and 12, the intermediate receiving portion 5042 is provided with a lower communication groove 5046, the lower communication groove 5046 is a vertical through groove, the lower communication groove 5046 communicates with the upper connection groove 5045, an axis of the lower communication groove 5046 coincides with an axis of the upper connection groove 5045, and an inner diameter of the lower communication groove 5046 is smaller than an inner diameter of the upper connection groove 5045. The seal rod 504 is provided with a patch groove 5047, the patch groove 5047 communicates with the lower communication groove 5046, the axis of the patch groove 5047 coincides with the axis of the lower communication groove 5046, and the patch groove 5047 has an inner diameter larger than the inner diameter of the lower communication groove 5046. The top of the attachment groove 5047 is located in the center socket 5042, and the bottom of the attachment groove 5047 is located in the lower connecting portion 5043.

Referring to fig. 12, a lower connection groove 5048 is provided in the lower connection 5043, the lower connection groove 5048 communicates with the lower connection groove 5046 to form a vertical through groove, and an axis of the lower connection groove 5048 coincides with an axis of the lower connection groove 5046. One end of the loading rod 8 is located in the lower connecting groove 5048, the loading rod 8 is fixedly connected in the lower connecting groove 5048, and the side wall of the loading rod 8 is attached to the side wall of the lower connecting groove 5048. A plurality of seventh sealing rings 801 are coaxially sleeved on the loading rod 8, the seventh sealing rings 801 are embedded in the outer wall of the loading rod 8, the seventh sealing rings 801 are fixedly connected with the loading rod 8, and the seventh sealing rings 801 abut against the side wall of the lower connecting groove 5048.

Referring to fig. 11 and 12, a load sensor 9 is provided in the seal rod 504, the load sensor 9 includes a strain gauge 901 and a lead 902, and the strain gauge 901 is electrically connected to the lead 902. The strain gauge 901 is fixedly connected in the patch groove 5047, the side wall of the strain gauge 901 is attached to the side wall of the patch groove 5047, and the strain gauge 901 abuts against the top of the loading rod 8. The strain gage 901 may be provided in plurality, with a plurality of strain gages 901 in an annular array about the axis of the patch slot 5047. One end of the wire 902 is connected to the strain gauge 901, and the other end of the wire 902 extends upward, passes through the lower connecting groove 5046, the upper connecting groove 5045 and the upper connecting groove 5033, and extends out of the upper connecting groove 5033.

Referring to fig. 12 and 13, a through groove 2013 is formed in the kettle cover 201, and an axis of the through groove 2013 coincides with an axis of the mounting groove 2012. Through groove 2013 and mounting groove 2012 intercommunication, form the logical groove in the vertical direction. One end of the loading rod 8 is located in the sealing rod 504, and the other end of the loading rod 8 extends downward to the outside of the second sealing sleeve 502, penetrates through the through groove 2013, and extends into the environmental chamber 2021. A space is formed between the side wall of the loading lever 8 and the inner wall of the second sealing sleeve 502, a plurality of guide bands 5027 are fixedly connected in the second mounting portion 5025, the axis of the guide bands 5027 coincides with the axis of the second sealing sleeve 502, the outer wall of the guide bands 5027 is attached to the inner wall of the second mounting portion 5025, and a space is formed between the inner wall of the guide bands 5027 and the side wall of the loading lever 8. The side wall of the load bar 8 is spaced from the side wall of the through slot 2013.

Referring to fig. 11 and 14, a balance pipe 10 is fixedly connected to the kettle cover 201, one end of the balance pipe 10 penetrates through the kettle cover 201 and extends into the environmental chamber 2021, the other end of the balance pipe 10 extends upward and is fixedly connected to the first sealing sleeve 501, and the inside of the balance pipe 10 is communicated with the inside of the first sealing sleeve 501. The balance pipe 10 is fixedly connected with a balance valve 11. The fourth sealing sleeve 5031 divides the space within the first housing portion 5012 into two portions, an upper housing cavity 5015 and a lower housing cavity 5016, with the upper housing cavity 5015 being located above the lower housing cavity 5016.

Referring to fig. 11 and 14, the interior of the balance tube 10 communicates with the upper housing chamber 5015 so that the pressure within the upper housing chamber 5015 is equal to the pressure within the ambient chamber 2021. A space is provided between the sidewall of the load bar 8 and the sidewall of the through slot 2013, and a space is provided between the sidewall of the load bar 8 and the sidewall of the second seal sleeve 502, so that the pressure inside the second seal sleeve 502 is equal to the pressure inside the environmental chamber 2021. The area of the circle having the diameter of the outer diameter of the socket 5042 is equal to the cross-sectional area of the fourth seal sleeve 5031, so that the upward and downward thrusts received by the seal rod 504 are balanced.

Referring to fig. 13, a sample holder 12, an upper clamping assembly 13 and a lower clamping assembly 14 are disposed in the environmental chamber 2021. The sample rack 12 includes a connecting rod block 121 and four connecting cover rods 122, the connecting rod block 121 is horizontally disposed in the environment chamber 2021, the connecting cover rods 122 are vertically disposed between the connecting rod block 121 and the kettle cover 201, and the connecting cover rods 122 are located at four corners of the connecting rod block 121. One end of the cover connecting rod 122 is fixedly connected with the kettle cover 201, the other end of the cover connecting rod 122 penetrates through the connecting rod block 121, and one end of the cover connecting rod 122 penetrating through the connecting rod block 121 is locked with the connecting rod block 121 through a nut.

Referring to fig. 13, the upper clamping assembly 13 includes a loading block 131, an upper mounting block 132 and an upper clamping block 133, the loading block 131 is coaxially sleeved at one end of the loading rod 8, and the loading block 131 is fixedly connected to the loading rod 8. The upper mounting block 132 is located below the loading rod 8, the loading block 131 is sleeved on the upper mounting block 132, and the loading block 131 is fixedly connected with the upper mounting block 132. The upper clamping block 133 is located below the upper mounting block 132, and the upper mounting block 132 is threadedly coupled to the upper clamping block 133. The lower clamp assembly 14 includes a lower mounting rod 141 and a lower clamp block 142. The lower clamping block 142 is located below the upper clamping block 133, and a space is provided between the lower clamping block 142 and the upper clamping block 133. The lower mounting rod 141 is vertically arranged, one end of the lower mounting rod 141 is in threaded connection with the bottom of the lower clamping block 142, and the other end of the lower mounting rod 141 penetrates through the connecting rod block 121 and is locked with the connecting rod block 121 through a nut.

Referring to fig. 13, the upper clamping block 133 is formed with an upper clamping groove 1331 and an upper locking groove 1332, the upper clamping groove 1331 is opened downward, and the upper clamping groove 1331 is a horizontal through groove. The upper locking groove 1332 communicates with the upper holding groove 1331, the upper locking groove 1332 is a horizontal through groove, and the upper locking groove 1332 and the upper holding groove 1331 extend in a direction perpendicular to each other. The lower clamping block 142 is provided with a lower clamping groove 1421 and a lower locking groove 1422, the lower clamping groove 1421 is opened upward, and the lower clamping groove 1421 is a horizontal through groove. The lower locking groove 1422 is communicated with the lower clamping groove 1421, the lower locking groove 1422 is a horizontal through groove, and the extension directions of the lower locking groove 1422 and the lower clamping groove 1421 are perpendicular to each other. In this embodiment, since both ends of the sample are provided with through holes, the upper lock groove 1332 is provided with the upper lock pin 1333, the lower lock groove 1422 is provided with the lower lock pin 1423, and both ends of the sample are fixed by the upper lock pin 1333 and the lower lock pin 1423. The corresponding upper and lower clamping blocks 133 and 142 may be replaced according to the size and shape of the sample.

Referring to fig. 15 and 16, the driving assembly 6 includes a motor 601, a base 602, a connection ring 603, a lead screw 604, a nut block 605, a driving pipe 606, a driving post 607, and a driving rod 608. The top of the frame 1 is provided with a fixing plate 15, the fixing plate 15 is horizontally erected on two fixing blocks 301 located above, and the fixing plate 15 is fixedly connected with the fixing blocks 301. An upper connecting plate 16 and a lower connecting plate 17 are arranged above the fixing plate 15, the upper connecting plate 16 is positioned above the lower connecting plate 17, a gap is formed between the upper connecting plate 16 and the lower connecting plate 17, and a gap is formed between the lower connecting plate 17 and the fixing plate 15. A plurality of connecting rods 18 are vertically arranged between the upper connecting plate 16 and the fixing plate 15, the connecting rods 18 are arranged around the axis of the upper connecting plate 16, and a space is reserved between every two adjacent connecting rods 18. One end of the connecting rod 18 is fixedly connected to the bottom of the upper connecting plate 16, and the other end of the connecting rod 18 penetrates through the lower connecting plate 17 and is fixedly connected to the top of the fixing plate 15. The connecting rod 18 is sleeved with a connecting sleeve 19, and the connecting sleeve 19 is in sliding connection with the connecting rod 18. The connecting sleeve 19 penetrates through the lower connecting plate 17, and the connecting sleeve 19 is fixedly connected with the lower connecting plate 17.

Referring to fig. 15 and 16, the connection ring 603 is fixedly connected to the upper connection plate 16, the base 602 is located on the connection ring 603, the connection ring 603 is sleeved at the bottom of the base 602, and the connection ring 603 is fixedly connected to the base 602. The motor 601 is fixedly connected to the base 602, an output shaft of the motor 601 penetrates through the base 602, and the output shaft of the motor 601 is rotatably connected to the base 602. The screw 604 is coaxially disposed below the output shaft of the motor 601, one end of the screw 604 penetrates the upper connecting plate 16 and the connecting ring 603, and the screw 604 is fixedly connected to the output shaft of the motor 601. The screw rod 604 is rotatably connected with the upper connecting plate 16 through a bearing, and the screw rod 604 is rotatably connected with the connecting ring 603 through a bearing. The driving pipe 606 is fixedly connected to the lower connecting plate 17, the nut block 605 is coaxially arranged in the driving pipe 606, the nut block 605 is fixed with the driving pipe 606 through a flange, and one end of the screw rod 604, which is far away from the motor 601, is in threaded connection with the nut block 605.

Referring to fig. 15 and 16, the driving post 607 is fixedly connected to the bottom of the lower connecting plate 17, the driving post 607 penetrates the fixing plate 15, and the driving post 607 is slidably connected to the fixing plate 15. The driving rod 608 is coaxially disposed with the driving column 607, one end of the driving rod 608 penetrates through the driving column 607 and is fixedly connected to the bottom of the lower connecting plate 17, and the other end of the driving rod 608 extends downward. A load frame 20 is arranged below the fixing plate 15, and the load frame 20 is a vertically arranged rectangular frame. The driving rod 608 penetrates the top of the load frame 20, and the driving rod 608 is fastened to the load frame 20 by two nuts. The load bar 503 penetrates the top of the load frame 20, and the load bar 503 is fastened to the load frame 20 by two nuts.

The implementation principle of the material tensile testing machine capable of simulating the fluid environment in the embodiment of the application is as follows: the kettle cover 201 and the kettle body 202 of the environment kettle 2 are connected through bolts, the kettle cover 201 is fixed with the rack 1 through the fixing component 3, and the kettle body 202 is moved in the vertical direction through the lifting component 4. When the mechanical property of a sample needs to be detected, the bolt between the kettle cover 201 and the kettle body 202 is unscrewed, the electric cylinder 407 is started, the piston rod of the electric cylinder 407 drives the lower mounting plate 406 to move downwards, the sliding plate 408 and the sliding rod 409 move along with the lower mounting plate, the lifting plate 403 is driven to move along the support rod 102, the kettle connecting rod 401 moves downwards, and the kettle body 202 is driven to move. After the kettle body 202 is moved to a proper position, the electric cylinder 407 is closed, the two ends of the sample to be tested are fixed through the upper clamping block 133 and the lower clamping block 142, the electric cylinder 407 is started again, and the kettle cover 201 is connected with the kettle body 202.

After the assembly of the sample is completed, the temperature in the environmental chamber 2021 can be controlled by changing the temperature of the jacket 7 through the temperature control pipe 701, and the medium can be input into the kettle body 202 or the pressure in the environmental chamber 2021 can be changed through the circulation pipe 203, so that the test environment of the sample can be simulated. After the environment simulation is completed, the motor 601 is started, the output shaft of the motor 601 drives the screw rod 604 to rotate, the nut block 605 is driven by the screw rod 604 to move upwards, so that the driving pipe 606, the lower connecting plate 17, the driving column 607 and the driving rod 608 move along with the screw rod 604, and the driving rod 608 applies an upward pulling force to the top end of the load rod 503 through the load frame 20. The load bar 503 applies an upward pulling force on the seal bar 504, and the seal bar 504 transfers the load to the load bar 8, thereby applying an upward pulling force on the sample through the upper clamp assembly 13.

In the detection process, a sealed environment is formed among the first sealing sleeve 501, the second sealing sleeve 502, the third sealing sleeve 505, the load rod 503, the sealing rod 504, the loading rod 8 and the environment kettle 2, because the strain gauge 901 is arranged in the patch groove 5047 above the loading rod 8, gaps are respectively formed between the side wall of the loading rod 8 and the kettle cover 201 as well as between the side wall of the loading rod 8 and the second sealing sleeve 502, and the second sealing ring 5014, the third sealing ring 5032 and the fifth sealing ring 5054 are respectively positioned above the strain gauge 901, the load detected by the strain gauge 901 eliminates the friction force with the sealed part, the accuracy of the tensile testing machine is improved, the defects that the tensile testing machine is influenced by the friction force and the detection result is inaccurate are overcome.

The equalizing tube 10 communicates the ambient chamber 2021 with the upper housing chamber 5015 and the media in the ambient chamber 2021 enters the upper housing chamber 5015 through the equalizing tube 10 so that the pressure in the ambient chamber 2021 is equalized with the pressure in the upper housing chamber 5015. Since the area of the circle whose diameter is equal to the outer diameter of the middle socket 5042 is equal to the cross-sectional area of the fourth sealing sleeve 5031, the upward thrust of the medium in the environmental chamber 2021 on the sealing rod 504 and the downward thrust of the medium in the upper receiving chamber 5015 on the sealing rod 504 are balanced, so that the impact force applied to the device when the sample is broken is greatly reduced, and the service life of the device is prolonged.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A material tensile testing machine capable of simulating a fluid environment is characterized in that: the device comprises a rack (1) and an environment kettle (2) arranged on the rack (1), wherein the environment kettle (2) comprises a kettle cover (201) and a kettle body (202), the kettle cover (201) is detachably connected with the kettle body (202), a first sealing sleeve (501) and a second sealing sleeve (502) are arranged on the kettle cover (201), the second sealing sleeve (502) is in sealing connection with the kettle cover (201), the first sealing sleeve (501) is in sealing connection with the second sealing sleeve (502), a load rod (503) is arranged in the first sealing sleeve (501), the load rod (503) is in sliding connection with the first sealing sleeve (501), one end, far away from the second sealing sleeve (502), of the first sealing sleeve (501) is sealed with the load rod (503), and a sealing rod (504) is arranged in the second sealing sleeve (502), a space is arranged between the side wall of the sealing rod (504) and the second sealing sleeve (502), one end of the sealing rod (504) is connected with the load rod (503), the other end of the sealing rod (504) is connected with a load rod (8), one end of the loading rod (8) connected with the sealing rod (504) is provided with a load sensor (9), the other end of the loading rod (8) penetrates through the second sealing sleeve (502) and the kettle cover (201), and extends into the kettle body (202), an upper clamping assembly (13) and a lower clamping assembly (14) for fixing a sample are arranged in the kettle body (202), the loading rod (8) is connected with the upper clamping component (13), the lower clamping component (14) is positioned below the upper clamping component (13), and a driving assembly (6) for driving the loading rod (503) to move upwards is arranged on the rack (1).

2. The material tensile testing machine capable of simulating a fluid environment according to claim 1, wherein: the kettle cover (201) is provided with a mounting groove (2012) and a through groove (2013), the mounting groove (2012) is communicated with the through groove (2013) to form a through groove in the vertical direction, the second sealing sleeve (502) is connected in the mounting groove (2012) in a sealing manner, the loading rod (8) penetrates through the through groove (2013), and a gap is formed between the side wall of the loading rod (8) and the side wall of the through groove (2013).

3. The material tensile testing machine capable of simulating a fluid environment according to claim 1, wherein: the side wall of the loading rod (8) is spaced from the side wall of the second sealing sleeve (502).

4. The material tensile testing machine capable of simulating a fluid environment according to claim 3, wherein: a guide belt (5027) is arranged on the side wall of the second sealing sleeve (502), and a gap is formed between the guide belt (5027) and the side wall of the loading rod (8).

5. The material tensile testing machine capable of simulating a fluid environment according to claim 1, wherein: a third sealing sleeve (505) is arranged between the first sealing sleeve (501) and the second sealing sleeve (502), the third sealing sleeve (505) is connected with the second sealing sleeve (502) in a sealing mode, the third sealing sleeve (505) is sleeved on the sealing rod (504), the third sealing sleeve (505) is sealed with the sealing rod (504), and the sealing rod (504) is connected with the third sealing sleeve (505) in a sliding mode.

6. The material tensile testing machine capable of simulating a fluid environment according to claim 5, wherein: the first sealing sleeve (501) comprises a first sealing portion (5011) and a first accommodating portion (5012), the first sealing portion (5011) is located above the first accommodating portion (5012), the load rod (503) and the first sealing portion (5011) are sealed, a space is reserved between the side wall of the load rod (503) and the side wall of the first accommodating portion (5012), a fourth sealing sleeve (5031) is sleeved on the load rod (503), the fourth sealing sleeve (5031) is located in the first accommodating portion (5012), and the fourth sealing sleeve (5031) and the first accommodating portion (5012) are sealed.

7. The material tensile testing machine capable of simulating a fluid environment according to claim 6, wherein: the fourth sealing sleeve (5031) divides the space in the first sealing sleeve (501) into an upper accommodating cavity (5015) and a lower accommodating cavity (5016), a balance pipe (10) is arranged on the environment kettle (2), one end of the balance pipe (10) is communicated with the interior of the kettle body (202), and the other end of the balance pipe (10) is communicated with the upper accommodating cavity (5015).

8. The material tensile testing machine capable of simulating a fluid environment according to claim 7, wherein: the sealing rod (504) comprises an upper connecting portion (5041), a middle bearing portion (5042) and a lower connecting portion (5043), the upper connecting portion (5041) is connected with the load rod (503), the lower connecting portion (5043) is connected with the load rod (8), the middle bearing portion (5042) is located between the upper connecting portion (5041) and the lower connecting portion (5043), the middle bearing portion (5042) is sealed with the third sealing sleeve (505), and the circular area with the outer diameter of the middle bearing portion (5042) as the diameter is equal to the cross-sectional area of the fourth sealing sleeve (5031).

9. The material tensile testing machine capable of simulating a fluid environment according to claim 1, wherein: the utility model discloses a seal rod, including seal rod (504), seted up in seal rod (504) patch groove (5047), load sensor (9) are located in patch groove (5047), load sensor (9) with the top of load pole (8) is connected, load pole (8) with seal rod (504) sealing connection.

10. The material tensile testing machine capable of simulating a fluid environment according to claim 1, wherein: the driving assembly (6) comprises a motor (601), a screw rod (604), a nut block (605) and a driving rod (608), the motor (601) is arranged on the rack (1), the screw rod (604) is connected with an output shaft of the motor (601), the nut block (605) is in threaded connection with the screw rod (604), the driving rod (608) is in sliding connection with the rack (1), one end of the driving rod (608) is connected with the nut block (605), and the other end of the driving rod (608) is connected with the load bearing rod (503).