One-way valve, nitrogen storage bin assembly and physical property sampler device

Abstract

The invention relates to the technical field of oil testing of petroleum and natural gas, in particular to a one-way valve, a nitrogen storage bin assembly and a physical property sampler device, and aims to solve the problems that an existing one-way valve cannot be suitable for a high-pressure physical property sampler device, and the sampling accuracy and success rate are low due to slight leakage. The one-way valve comprises a valve element, a valve body, a spring and a sealing ring. The sealing ring is installed on the end face of the valve element. One end of the spring is connected with the valve element, and the other end of the spring is connected with the valve body and used for applying thrust to the valve element to enable the valve element and the valve body to extrude the sealing ring. According to the one-way valve, the valve element and the valve body are matched to achieve sealing through the pressurizing sealing ring, so that zero leakage is achieved, the one-way valve can be used for gas and liquid media, guarantee is provided for underground sampling, the pressure maintaining effect on samples is guaranteed, and the sampling accuracy and success rate are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas well testing, and particularly to a check valve, a nitrogen storage tank assembly and a physical property sampler device. Background Art

[0002] In the existing check valve, due to the use of metal seals, there will be slight air leakage in the metal seals under high-pressure gas conditions, and it does not have the ability to maintain pressure for a long time. When used in a high-pressure physical property sampler device, it will cause leakage, affecting the accuracy and success rate of sampling. Summary of the Invention

[0003] The purpose of the present invention is to provide a check valve, a nitrogen storage tank assembly and a physical property sampler device to solve the problem that the existing check valve cannot be applied to a high-pressure physical property sampler device, resulting in low sampling accuracy and success rate due to slight leakage.

[0004] To solve the above technical problems, the technical solution provided by the present invention lies in:

[0005] A check valve includes a valve core, a valve body, a spring and a sealing ring; the sealing ring is installed on the end face of the valve core; one end of the spring is connected to the valve core, and the other end is connected to the valve body, for applying a thrust force to the valve core so that the valve core and the valve body squeeze the sealing ring.

[0006] Further, the check valve further includes a guide sleeve, the guide sleeve is installed on the valve body, and the valve core is inserted into the guide sleeve and can move along the guide sleeve.

[0007] Further, a flow channel is provided on the guide sleeve, and the flow channel extends along the axial direction of the guide sleeve.

[0008] Further, the check valve further includes an adjusting nut, the adjusting nut is threadedly connected to the valve body, one end of the spring is connected to the valve core, and the other end is connected to the adjusting nut.

[0009] Further, a sealing groove is provided on the end face of the valve core, and the sealing ring is installed in the sealing groove.

[0010] Further, the sealing ring is set as an O-ring made of fluororubber.

[0011] On the other hand, the present invention proposes a nitrogen storage tank assembly, which includes the above check valve, and further includes a nitrogen storage pipe body, and the check valve is installed at the inlet of the nitrogen storage pipe body.

[0012] Further, the nitrogen storage tank assembly further includes a sealing plug, the sealing plug is installed on the nitrogen storage pipe body for blocking the inlet of the check valve.

[0013] Further, the nitrogen storage pipe body is provided with a nitrogen storage tank, and the outlet of the check valve is communicated with the nitrogen storage tank.

[0014] In a third aspect of the present invention, a physical property sampler device is proposed, which includes the above-mentioned nitrogen storage bin assembly and also includes a sampler assembly; the sampler assembly is provided with a sampling bin, and a floating valve is arranged in the sampling bin. The floating valve is inserted into the sampling bin and divides the sampling bin into a sampling space and a balancing space; the nitrogen storage bin stores gas and is communicated with the balancing space to apply a thrust to the floating valve.

[0015] Based on the above technical solutions, the technical effects that the present invention can achieve are as follows:

[0016] The check valve provided by the present invention includes a valve core, a valve body, a spring and a sealing ring; the sealing ring is installed on the end face of the valve core; one end of the spring is connected to the valve core, and the other end is connected to the valve body, and is used to apply a thrust to the valve core so that the valve core and the valve body squeeze the sealing ring.

[0017] The check valve provided by the present invention realizes sealing by pressing the sealing ring through the cooperation of the valve core and the valve body, thereby achieving zero leakage, and can be used for both gas and liquid media, providing guarantee for downhole sampling, ensuring the pressure maintaining effect on the sample, and improving the accuracy and success rate of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of the physical property sampler device provided by the embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the three-parameter assembly;

[0021] Figure 3 It is a schematic structural diagram of the upper section of the three-parameter assembly;

[0022] Figure 4 It is a schematic structural diagram of the lower section of the three-parameter assembly;

[0023] Figure 5 It is a schematic structural diagram of the switch assembly;

[0024] Figure 6 It is a schematic structural diagram of the upper section of the switch assembly;

[0025] Figure 7 It is a schematic structural diagram of the lower section of the switch assembly;

[0026] Figure 8 It is a schematic structural diagram of the sampler assembly;

[0027] Figure 9 It is a schematic structural diagram of a nitrogen storage bin assembly;

[0028] Figure 10 is Figure 9 a schematic structural diagram of the one-way valve at position A in

[0029] Icons: 100 - three-parameter assembly; 200 - switch assembly; 300 - sampler assembly; 400 - nitrogen storage bin assembly; 110 - parameter frame; 120 - single-core plug; 130 - first connector; 140 - water content probe; 150 - temperature probe; 160 - pressure probe; 170 - first compression nut; 180 - plug; 190 - circuit framework; 111 - first probe framework; 112 - pressure and temperature framework; 113 - connecting pipe body; 210 - four-core slip ring; 220 - switch body; 230 - motor; 240 - coupling; 250 - lead screw; 260 - transmission shaft; 270 - switch piston; 280 - single-core slip ring; 221 - first pipe body; 222 - stroke frame; 223 - second pipe body; 224 - third pipe body; 310 - sampling pipe body; 320 - first switching valve; 330 - sample transfer valve; 340 - sampling sensor; 350 - second compression nut; 360 - floating valve; 370 - magnetic steel; 380 - second connector; 390 - connecting valve; 3110 - sample transfer plug; 3120 - second switching valve; 3130 - third connector; 410 - one-way valve; 420 - nitrogen storage pipe body; 430 - sealing plug; 440 - third switching valve; 450 - fourth connector; 11 - inlet pressure hole; 21 - switch channel; 22 - inlet liquid hole; 31 - sampling bin; 311 - sampling space; 312 - balance space; 32 - sampling channel; 41 - nitrogen storage bin; 411 - valve core; 412 - valve body; 413 - guide sleeve; 414 - spring; 415 - sealing ring; 416 - adjusting nut. Detailed implementation manners

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0032] The following will, in conjunction with the accompanying drawings, elaborate on some embodiments of the present invention. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0033] This embodiment provides a physical property sampler device, which includes a three-parameter component 100, a switch component 200, a sampler component 300, and a nitrogen storage bin component 400 that are connected in sequence, as Figure 1 shown, to solve the problems of complex operation of existing samplers, difficult mastery of the oil-water interface, and low sampling success rate.

[0034] Specifically, a liquid inlet hole 22 and a switch channel 21 are provided on the switch component 200, a sampling bin 31 and a sampling channel 32 are provided on the sampler component 300, the sampling bin 31 is separated by a floating valve 360 into a sampling space 311 and a balance space 312, the nitrogen storage bin component 400 is provided with a nitrogen storage bin 41, and the nitrogen storage bin 41 is communicated with the balance space 312 for applying pressure to the floating valve 360 to maintain the pressure in the sampling space 311. Specifically, the liquid inlet hole 22, the switch channel 21, the sampling channel 32, and the sampling space 311 are communicated in sequence.

[0035] Among them, the three-parameter component 100 is used for downhole data collection and transmission to monitor downhole fluid parameters in real time. The switch component 200 is used to open and close the downhole sample sampling channel 32. The sampler component 300 is used for sample collection, storage, and preservation. The nitrogen storage bin component 400 is used to maintain the pressure balance in the sampling space 311 during the sampling process.

[0036] The following will, in conjunction with Figures 1 - 10 elaborate on the structure and shape of the physical property sampler device provided in this embodiment:

[0037] In an alternative solution of this embodiment, as Figure 2 、 Figure 3 、 Figure 4 shown, the three-parameter component 100 is used to monitor downhole fluid parameters, including a parameter frame body 110, a single-core plug 120, a first connector 130, a water content probe 140, a temperature probe 150, a pressure probe 160, a first compression nut 170, a plug 180, and a circuit skeleton 190. Specifically, the parameter frame body 110 includes a first probe skeleton 111, a pressure and temperature skeleton 112, and a connecting pipe body 113 that are connected in sequence. One end of the first probe skeleton 111 is connected to the first connector 130, and the other end is connected to the pressure and temperature skeleton 112. The single-core plug 120 and the water content probe 140 are installed on the first probe skeleton 111. The single-core plug 120 is used for electrical connection, and the water content probe 140 is used to monitor the water content parameter of downhole fluid.

[0038] In this embodiment, the temperature probe 150 and the pressure probe 160 are installed on the pressure and temperature framework 112, and are respectively used to monitor the temperature parameter and the pressure parameter of the downhole fluid. The first compression nut 170 is used to lock the pressure probe 160 so that it is fixed on the pressure and temperature framework 112. The circuit framework 190 is installed on the connecting pipe body 113 and is used to install circuit boards and the like.

[0039] In this embodiment, the parameter framework 110 is provided with an inner cavity. The plug 180 is connected to one end of the first connector 130 away from the first probe framework 111 and is used to block the inner cavity of the parameter framework 110. The water-containing probe 140, the temperature probe 150, the pressure probe 160, etc. are arranged in the inner cavity.

[0040] In this embodiment, a pressure inlet hole 11 is opened on the parameter framework 110. The pressure inlet hole 11 is opened on the pressure and temperature framework 112 and is communicated with the inner cavity of the parameter framework 110. During operation, the downhole fluid enters the inner cavity through the pressure inlet hole 11 and enables the water-containing probe 140, the temperature probe 150, and the pressure probe 160 to perform parameter monitoring.

[0041] In an alternative solution of this embodiment, the switch assembly 200 includes a four-core slip ring 210, a switch body 220, a motor 230, a coupling 240, a lead screw 250, a transmission shaft 260, a switch piston 270, and a single-core slip ring 280, as Figure 5 , Figure 6 , Figure 7 shown. Among them, the switch body 220 includes a first pipe body 221, a travel frame 222, a second pipe body 223, and a third pipe body 224 connected in sequence. A switch channel 21 and a liquid inlet hole 22 are provided on the switch body 220. The liquid inlet hole 22 is communicated with the switch channel 21. The movement of the switch piston 270 along its own axis can control the opening and closing of the liquid inlet hole 22. Specifically, the four-core slip ring 210 is installed on the first pipe body 221 for electrical connection; the motor 230 is installed in the first pipe body 221 and is connected to the lead screw 250 through the coupling 240. The lead screw 250 is connected to the transmission shaft 260 and is coaxially arranged. The transmission shaft 260 is connected to the switch piston 270; the travel frame 222 is used to install the lead screw 250 and limit switches, etc. The limit switch is used to judge the position of the switch piston 270. During operation, the motor 230 drives the lead screw 250 to rotate, so that the lead screw 250 drives the transmission shaft 260 to move along its own axis, and then drives the switch piston 270 to move along its own axis to realize the opening and closing of the liquid inlet hole 22.

[0042] In this embodiment, the lead screw 250 can be selected as a roller lead screw 250 and is rotatably installed on the travel frame 222.

[0043] In an alternative solution of this embodiment, the sampler assembly 300 includes a sampling pipe body 310, a first switching valve 320, a sample transfer valve 330, a sampling sensor 340, a second compression nut 350, a floating valve 360, a magnetic steel 370, a second joint 380, a connection valve 390, a sample transfer plug 3110, a second switching valve 3120, and a third joint 3130, as Figure 8 shown. Specifically, a sampling bin 31 is provided on the sampling pipe body 310, and a sampling channel 32 is provided on the third joint 3130. One end of the sampling channel 32 is communicated with the switching channel 21, and the other end is communicated with the sampling bin 31. The floating valve 360 is inserted into the sampling bin 31 and divides the sampling bin 31 into a sampling space 311 and a balance space 312. The floating valve 360 can slide along its own axis direction to change the sizes of the sampling space 311 and the balance space 312. Among them, the magnetic steel 370 is installed on the floating valve 360 and moves with the floating valve 360. During ground preparation, the position of the floating valve 360 can be judged by the magnetic force of the magnetic steel 370. By obtaining the position of the floating valve 360 on the ground, the software calculation result of the ground preset pressure can be verified, so as to obtain a compensation coefficient to improve the calculation accuracy of the ground preset pressure software; for different instruments, due to the difference in manufacturing processes, the compensation coefficients are different and need to be input into the software calculation to improve the accuracy.

[0044] In this embodiment, the sampling sensor 340 is installed on the sampling pipe body 310 and is used to monitor the temperature and pressure in the sampling space 311. The second compression nut 350 is used to fix the sampling sensor 340. Specifically, the sampling sensor 340 is set as a bridge-type pressure sensor. This sensor has four wiring terminals, which are divided into two groups. One group is for sensor power supply, and the other group is for pressure differential output. The output can be used to measure the pressure in the sampling bin 31. The input resistance of the sensor changes with the temperature. Using this characteristic, a constant current power supply method for the sensor is adopted, and the supply voltage is measured at the same time. Therefore, the voltage change reflects the change of the resistance at the power supply end, and this resistance value has an approximate linear relationship with the temperature change, so that the temperature and pressure in the sampling bin 31 can be monitored at the same time.

[0045] In this embodiment, the third joint 3130 is used to connect the sampling pipe body 310 and the switch body 220. The first switching valve 320 is installed on the third joint 3130 and is used to control the on-off of the sampling channel 32. The sample transfer valve 330 is installed on the sampling pipe body 310 to close the sampling pipe body 310 and ensure the sealing of the sampling channel 32.

[0046] In this embodiment, one end of the second joint 380 is connected to the sampling pipe body 310, and the other end is connected to the nitrogen storage bin assembly 400. The second switching valve 3120 is installed on the second joint 380 and is used to control the on-off of the balance space 312 and the nitrogen storage bin 41.

[0047] In this embodiment, the connection valve 390 is installed on the second joint 380. Nitrogen can be filled into the balance space 312 through the connection valve 390 for sample transfer. Preferably, the connection valve 390 is set as a one-way valve 410 to prevent gas leakage. The sample transfer plug 3110 is installed on the second joint 380 to block the inlet of the connection valve 390.

[0048] In this embodiment, the nitrogen storage bin assembly 400 includes a one-way valve 410, a nitrogen storage pipe body 420, a sealing plug 430, a third switching valve 440, and a fourth joint 450, as Figure 9 shown. One end of the fourth joint 450 is inserted into the second joint 380, and the other end is connected to the nitrogen storage pipe body 420. A nitrogen storage bin 41 is arranged inside the nitrogen storage pipe body 420 for storing nitrogen or other stable gases. The third switching valve 440 is installed on the fourth release to control the on-off between the nitrogen storage bin 41 and the balance space 312. The one-way valve 410 is installed at the inlet of the nitrogen storage bin 41 to prevent nitrogen leakage and fill nitrogen into the nitrogen storage bin 41, and the sealing plug 430 is used to block the inlet of the nitrogen storage bin 41.

[0049] In this embodiment, the one-way valve 410 includes a valve core 411, a valve body 412, a guide sleeve 413, a spring 414, a sealing ring 415, and an adjusting nut 416, as Figure 10 shown. The valve body 412 is inserted into the nitrogen storage pipe body 420 and is threadedly connected to the nitrogen storage pipe body 420. The valve core 411 is arranged inside the valve body 412 and is slidably connected to the valve body 412. The adjusting nut 416 is installed on the valve body 412 and is threadedly connected to the valve body 412. One end of the spring 414 is connected to the adjusting nut 416, and the other end is connected to the valve core 411 for applying a thrust to the valve core 411. The guide sleeve 413 is installed on the valve body 412, and the valve core 411 is inserted into the guide sleeve 413. The inner wall of the guide sleeve 413 is provided with a flow channel for fluid passage. The length of the guide sleeve 413 is greater than that of the valve core 411 to provide guidance for the movement of the valve core 411 and ensure the stability of the valve core 411. In this embodiment, a plurality of flow channels are evenly distributed inside the guide sleeve 413 so that the inner wall of the guide sleeve 413 forms a spline structure.

[0050] In this embodiment, the sealing ring 415 is installed at the end of the valve core 411. A sealing groove is formed at the end of the valve core 411 for installing the sealing ring 415. The valve core 411 abuts against the sealing ring 415 under the thrust of the spring 414 so that a seal is formed between the valve core 411, the sealing ring 415, and the valve body 412. The zero-leakage sealing effect is ensured by the end face sealing method. Preferably, the sealing ring 415 is a high-temperature-resistant fluororubber O-ring.

[0051] The working process of the one-way valve 410 provided in this embodiment is as follows:

[0052] When the nitrogen storage bin 41 is filled with fluid, the fluid pushes the valve core 411 open, the valve core 411 presses the guide sleeve 413 to slide, and the fluid enters the nitrogen storage bin 41 from the inlet through the sealing ring 415 and the flow groove of the guide sleeve 413; after the fluid is filled, the valve core 411 presses the sealing ring 415 against the valve body 412 under the pressure of the fluid in the nitrogen storage bin 41, thereby achieving a sealing fit and ensuring a sealing effect. In addition, the initial compression amount of the spring 414 can be adjusted by rotating the adjustment nut 416, thereby adjusting the opening pressure of the one-way valve 410 to adapt to different working conditions.

[0053] Since ordinary one-way valves use metal seals, they will have slight leakage under high-pressure gas conditions and do not have the ability to maintain pressure for a long time. The one-way valve 410 provided in this embodiment uses a high-temperature resistant fluororubber O-ring seal to ensure zero leakage under high-pressure gas or liquid conditions, making the one-way valve 410 a zero-leakage one-way valve 410 that can be shared by both gas and liquid, which can effectively keep the nitrogen storage bin 41 from leaking, thereby effectively maintaining the pressure in the sampling bin 31, and further maintaining the original state of the sample to improve the sampling success rate.

[0054] In addition, due to the high cost of micro-precision processing of ordinary one-way valves, the use of micro-one-way valves is small, which is not conducive to mass production; at the same time, since the one-way valve needs to withstand a high pressure, the one-way valve processed with ordinary materials has a large volume of the pressure-bearing part to ensure the pressure-bearing characteristics. The one-way valve 410 provided in this embodiment is miniaturized through the design of the sealing structure and the selection of materials to match the use requirements of the sampler.

[0055] The working process of the physical property sampler device provided in this embodiment is as follows:

[0056] Before going down the well, connect each component in sequence, close the liquid inlet 22 with the switch piston 270, close the third switch valve 440 and remove the sealing plug 430, fill the nitrogen storage bin 41 with nitrogen through the one-way valve 410 to preset the nitrogen pressure, the one-way valve 410 can prevent nitrogen leakage, and then install the sealing plug 430. Then open the first switch valve 320 to connect the switch channel 21, the sampling channel 32 and the sampling space 311; open the second switch valve 3120 and the third switch valve 440 to connect the balance space 312 with the nitrogen storage bin 41. Then go down the well to take samples.

[0057] During the process of going down the well, the three-parameter component 100 monitors the downhole fluid parameters in real time. When the fluid parameters meet the sample collection requirements, the switch piston 270 moves to open the liquid inlet hole 22, so that the sample enters the switch channel 21 and enters the sampling space 311 through the sampling channel 32. After the sample collection is completed, the switch piston 270 is reset to close the liquid inlet hole 22. After the collection is completed, the chamber pressure can be monitored in real time through the sampling sensor 340 during the process of lifting the instrument to prevent sample failure.

[0058] After sampling is completed, the first switch valve 320, the second switch valve 3120 and the third switch valve 440 are closed, and the sampler assembly 300 can be removed and sent for testing. When transferring samples, the sample transfer plug 3110 is removed and the balance space 312 is inflated through the connecting valve 390, and the sample transfer valve 330 is opened at the same time, so that the sample is discharged from the sampling space 311 under a constant pressure to ensure the authenticity of the sampling.

[0059] The physical property sampler device provided in this embodiment integrates the monitoring of fluid parameters such as water content, flow pressure, flow temperature, bin pressure, bin temperature, etc., and realizes the integrated monitoring effect of all parameters. In particular, the high-fidelity sample collection technology is realized by using the nitrogen storage bin 41 to maintain pressure; at the same time, a zero-leakage dedicated control valve is used to ensure the sealing effect and the authenticity of the oil well produced fluid sampling. In addition, a special prefabricated pressure calculation software can be configured to realize the digital display of monitoring data and data processing control.

[0060] The physical property sampler device provided in this embodiment can monitor the pressure of the sampling chamber 31 in real time, and effectively maintain the pressure of the sampling chamber 31 through the gas in the nitrogen storage chamber 41, so as to maintain the original state of the sample as much as possible to improve the sampling success rate and obtain effective high-pressure physical property data. That is, by maintaining the pressure of the original formation sample, the sample can be kept above the saturation pressure before the sample is transferred, thereby reducing repeated work and improving efficiency and sampling success rate.

[0061] The physical property sampler device provided in this embodiment is a gas-liquid two-phase sampler. Through water content monitoring, dual temperature and dual pressure monitoring, it avoids over-reliance on operator experience and judgment during sampling, shortens the sampling time. At the same time, it provides sampling operation calculation software to guide the operator in the process of presetting the pressure on the ground, further improving the sampling success rate.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A one-way valve, characterized in that, It includes a valve core (411), a valve body (412), a spring (414) and a sealing ring (415). The sealing ring (415) is installed on the end face of the valve core (411). One end of the spring (414) is connected to the valve core (411), and the other end is connected to the valve body (412), and is used to apply a thrust force to the valve core (411) so that the valve core (411) and the valve body (412) squeeze the sealing ring (415).

2. The check valve according to claim 1, characterized in that, It further includes a guide sleeve (413), the guide sleeve (413) is installed on the valve body (412), and the valve core (411) is inserted into the guide sleeve (413) and can move along the guide sleeve (413).

3. The one-way valve according to claim 2, characterized in that, The guide sleeve (413) is provided with a flow channel, and the flow channel extends along the axial direction of the guide sleeve (413).

4. The one-way valve according to claim 1, characterized in that, It further includes an adjusting nut (416), the adjusting nut (416) is threadedly connected to the valve body (412), one end of the spring (414) is connected to the valve core (411), and the other end is connected to the adjusting nut (416).

5. The one-way valve according to claim 1, characterized in that, The end face of the valve core (411) is provided with a sealing groove, and the sealing ring (415) is installed in the sealing groove.

6. The check valve according to claim 1, characterized in that, The sealing ring (415) is set as an O-ring made of fluororubber.

7. A nitrogen storage bin assembly, characterized in that, It includes a one-way valve (410) according to any one of claims 1-6, and further includes a nitrogen storage tube body (420), and the one-way valve (410) is installed at the inlet of the nitrogen storage tube body (420).

8. The nitrogen storage bin assembly according to claim 7, wherein It further includes a sealing plug (430), the sealing plug (430) is installed on the nitrogen storage tube body (420) for plugging the inlet of the one-way valve (410).

9. The nitrogen storage bin assembly according to claim 8, wherein, The nitrogen storage tube body (420) is provided with a nitrogen storage chamber (41), and the outlet of the one-way valve (410) is communicated with the nitrogen storage chamber (41).

10. A physical property sampler device, characterized in that, It includes a nitrogen storage chamber assembly (400) according to claim 9, and further includes a sampler assembly (300). The sampler assembly (300) is provided with a sampling chamber (31), a floating valve (360) is arranged in the sampling chamber (31), and the floating valve (360) is inserted into the sampling chamber (31) and divides the sampling chamber (31) into a sampling space (311) and a balance space (312). The nitrogen storage chamber (41) stores gas and is communicated with the balance space (312) to apply a thrust force to the floating valve (360).

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