CN210719816U - Big jar sampling device - Google Patents

Abstract

The utility model provides a big jar of sampling device, include: the sampling device comprises a sampling cylinder and a movable piston, wherein an accommodating space is formed in the sampling cylinder, the movable piston is positioned in the accommodating space, a sampling tube communicated with the accommodating space is arranged at the bottom end of the sampling cylinder, and a sample outlet tube communicated with the accommodating space is arranged on the side wall of the sampling cylinder; the removal piston is used for through remove the change in the accommodation space inside pressure in the accommodation space to make and wait to get solution and pass through the sampling tube enters into in the accommodation space and by it discharges to go out the appearance pipe accommodation space, the utility model provides a big jar sampling device can take a sample between the sample layer of the different degree of depth in succession, and sampling accuracy is high and easy operation.

Description

Big jar sampling device

Technical Field

The utility model relates to a petroleum equipment field especially relates to a big jar of sampling device.

Background

The crude oil can be placed in the settling cask in the united station or the oil storage tank in the oil storage storehouse after being mined and is stored, in order to guarantee the quality of the crude oil during storage, the crude oil in the tank needs to be regularly sampled, the quality change condition of the crude oil in the inspection tank can not be found in time when the quality of the crude oil goes wrong, and further loss is caused.

At present, the sample of crude oil generally divide into two kinds of sampling modes of artifical sample and mechanical automatic sampling, and artifical sample is generally that the staff scrambles the sample connection to jar body top, then ties up the sampling bottle on the rope, and it is internal to suspend in midair the entering jar that uses the mode of lifting rope, treats that the sampling bottle is filled the back and then proposes the sampling bottle, and mechanical automatic sampling then is by sampling device regularly automatic to jar internal crude oil sample.

However, both manual sampling and mechanical automatic sampling have some disadvantages, the volume of the tank for storing crude oil is very large, the sampling bottle used in manual sampling is an open type sampling mode, it is difficult to sample liquids with different depths in the tank, crude oil can be layered in the tank due to the relationship of liquid gravity, and the measurement parameters of solutions with different layers can be different, so that the sampling precision of the sample obtained by the sampling bottle is low, the liquid mixing phenomena with different depths exist, and it is difficult to sample liquids with specific layers, the sampling amount can not be controlled, mechanical automatic sampling also has the above problems, only can sample liquids with a certain depth at a fixed point, and can not sample liquids with different depths respectively, and a sampler is used for sampling, but the capacity of the sampler is small, so that the sampler can not sample continuously, when a plurality of samples need to be taken, the operation is complicated.

SUMMERY OF THE UTILITY MODEL

The utility model provides a big jar sampling device through the cooperation between sampler barrel and the removal piston, carries out the continuous sampling on different degree of depth sample layer to the sample in the big jar, has solved the technical problem that big jar sample operation difficulty and sampling precision are poor among the prior art.

The utility model provides a big jar of sampling device, include:

the sampling device comprises a sampling cylinder and a movable piston, wherein an accommodating space is formed in the sampling cylinder, the movable piston is positioned in the accommodating space, a sampling tube communicated with the accommodating space is arranged at the bottom end of the sampling cylinder, and a sample outlet tube communicated with the accommodating space is arranged on the side wall of the sampling cylinder;

the movable piston is used for changing the internal pressure in the accommodating space by moving in the accommodating space, so that the solution to be sampled enters the accommodating space through the sampling tube and is discharged out of the accommodating space through the sample outlet tube.

Further, the moving piston includes: piston plate, play liquid valve, connecting rod and handle, wherein, the terminal surface butt of the vertical direction of piston plate is in on the inner wall of accommodation space, the intercommunicating pore has been seted up on the terminal surface of piston plate horizontal direction, go out the one end of liquid valve with the intercommunicating pore is connected, go out the other end of liquid valve with the one end of connecting rod is connected, the other end of connecting rod with the handle is connected.

Further, the piston plate is used for moving up and down in the vertical direction in the accommodating space under the driving of the connecting rod and the handle.

Further, a liquid outlet ball is arranged in the liquid outlet valve and used for controlling the opening and closing of the communicating hole, when the communicating hole is closed, the liquid outlet ball is clamped in the communicating hole, and when the communicating hole is opened, the liquid outlet ball is located on the outer side of the communicating hole.

Further, the piston plate divides the accommodating space into an upper part and a lower part, the sample outlet pipe communicates the accommodating space on the upper part of the piston plate with the outside, and the sampling pipe communicates the accommodating space on the lower part of the piston plate with the outside.

Further, still be equipped with the feed liquor valve in the accommodation space, the sampling tube pass through the feed liquor valve with accommodation space intercommunication.

Further, be equipped with into liquid ball in the feed liquor valve, work as into the liquid ball be located when the sample tube is outside, the sampling tube with communicate between the accommodation space, work as into the liquid ball be located when the sampling tube is interior, the sampling tube with be closed between the accommodation space.

Further, when the piston plate moves upwards in the accommodating space, the liquid outlet valve is closed, the liquid outlet ball is clamped in the communication hole, the liquid inlet valve is opened, and a solution to be taken enters the accommodating space at the lower part of the piston plate through the sampling pipe.

Further, when the piston plate moves downwards in the accommodating space, the liquid inlet valve is closed, the liquid inlet ball is clamped in the sampling pipe, the liquid outlet valve is opened, and a solution to be taken, which is positioned in the accommodating space, enters the accommodating space at the upper part of the piston plate through the liquid outlet valve and is discharged out of the accommodating space through the sample outlet pipe.

Furthermore, the sampling tube and the outer surface of the sampling tube are provided with scales.

The utility model provides a large tank sampling device, which comprises a movable piston and a sampling cylinder, wherein the sampling cylinder is internally provided with a relatively closed containing space, the movable piston is positioned in the containing space, the end surface of the movable piston in the vertical direction is abutted against the inner wall of the containing space, the movable piston can move up and down in the containing space along the vertical direction, the bottom end of the sampling cylinder is provided with a sampling tube communicated with the containing space, the side wall of the sampling cylinder is provided with a sample outlet tube communicated with the containing space, the pressure intensity in the containing space can be changed when the movable piston moves in the containing space, so that samples can enter the containing space through the sampling tube, and the samples entering the containing space can be discharged out of the containing space through the sample outlet tube, not only can samples in different layers be extracted through the sampling tube, but also a plurality of samples can be continuously extracted in one sampling work, the technical problems that the sampler is difficult to extract samples of different layers, the capacity of the sampler is small, and continuous sampling cannot be performed are solved.

Drawings

Fig. 1 is a schematic view of an overall structure of a sampling device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a movable piston in a sampling device according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a liquid inlet ball in the sampling device according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a sampling cylinder in a sampling device according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a liquid outlet valve in the sampling device according to the embodiment of the present invention;

fig. 6 is another schematic structural diagram of a sampling device according to an embodiment of the present invention.

Description of reference numerals:

1-a sampling device;

10-a moving piston;

11-a piston plate;

12-a liquid outlet valve;

13-a connecting rod;

14-a handle;

121-liquid outlet ball;

20-a sampling tube;

21-an accommodation space;

22-a sampling tube;

23-sample outlet pipe;

24-liquid inlet ball.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the accompanying drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The present embodiment provides a sampling device 1, as shown in fig. 1, for sampling a large tank for storing crude oil, comprising: the sampling device comprises a movable piston 10 and a sampling cylinder 20, wherein an accommodating space 21 is arranged in the sampling cylinder 20, the sampling cylinder 20 is a relatively closed cylindrical container, a cavity in the sampling cylinder 20, namely the accommodating space 21 is used for storing a crude oil sample to be taken extracted from an oil storage tank body, the movable piston 10 is positioned in the accommodating space 21, the movable piston 10 is clamped on the inner wall of the accommodating space 21, the end face of the movable piston 10 in the vertical direction abuts against the inner wall in the accommodating space 21, so that the movable piston 10 and the accommodating space 21 are relatively fixed, the movable piston 10 can move up and down in the accommodating space 21, and the internal pressure of the accommodating space 21 is adjusted.

Optionally, in this embodiment, a sampling tube 22 is disposed at the bottom end of the sampling tube 20, the sampling tube 22 connects the accommodating space 21 with the outside, a sample outlet tube 23 is disposed on a side wall of the sampling tube 20, the accommodating space 21 is connected with the outside through the sample outlet tube 23, crude oil in the oil storage tank enters the accommodating space 21 through the sampling tube 22, and crude oil entering the accommodating space 21 is discharged out of the accommodating space 21 through the sample outlet tube 23.

It should be noted that, in this embodiment, the sampling tube 22 is located on the end face of the bottom of the sampling cylinder 20, that is, directly below the sampling cylinder 20, which is convenient for the sampling cylinder 20 to sample, and when the sampling cylinder 20 samples, samples of different depths need to be extracted, the sampling tube 22 is located directly below the sampling cylinder 20, which is convenient for contacting with the stratification having a deeper depth of the bottom layer, and the sample discharge tube 23 is located on the sidewall of the sampling cylinder 20, specifically, the sample discharge tube 23 is located on the sidewall close to the top end of the sampling cylinder 20, the sample discharge tube 23 is used for discharging the sample sucked into the accommodating space 21, and is disposed at the top end of the sampling cylinder 20 to be unfavorable for discharging the sample, and therefore, is disposed on the sidewall close to the top end.

Alternatively, in this embodiment, when the movable piston 10 moves in the accommodating space 21, the pressure in the accommodating space 21 changes with the movement of the movable piston 10, specifically, the movable piston 10 moves up and down in the accommodating space 21 in the vertical direction, and during the movement, the air in the accommodating space 21 is discharged or the sample is sucked into the accommodating space 21, and in the initial state, the accommodating space 21 has a certain amount of air therein, so that the pressure in the accommodating space 21 is the same as the atmospheric pressure outside, when the movable piston 10 moves upward in the vertical direction, the sampling device 1 is in the extraction state, the sample in the oil storage tank is extracted into the accommodating space 21 through the sampling tube 22, and when the movable piston 10 moves downward in the vertical direction, the sampling device 1 is in the discharge state, the sample sucked into the accommodating space 21 is driven by the movable piston 10, is discharged from a sample discharge pipe 23 provided on the side wall of the sampling tube 20, thereby completing the sampling and sample discharge operations.

It should be noted that, in this embodiment, the sample has the sampling tube 22 entering the accommodating space 21, and is discharged to the outside of the accommodating space 21 through the sample discharge tube 23, wherein both the sampling tube 22 and the sample discharge tube 23 can be regarded as a one-way valve, the sampling tube 22 is the only inlet, and the sample discharge tube 23 is the only outlet, that is, the sample can only enter the accommodating space 21 through the sampling tube 22, and the sample can only be discharged through the sample discharge tube 23 after entering the accommodating space 21, but cannot be discharged to the outside of the accommodating space 21 through the sampling tube 22, and both the sampling tube 22 and the sample discharge tube 23 are driven by the movable piston 10, so that the sampling device 1 continuously samples the sample in the oil storage tank like a syringe, and can sample oil layers of different depths.

The embodiment provides a large-tank sampling device 1, which comprises a movable piston 10 and a sampling tube 20, wherein the sampling tube 20 is internally provided with a relatively closed accommodating space 21, the movable piston 10 is positioned in the accommodating space 21, the end surface of the movable piston 10 in the vertical direction abuts against the inner wall of the accommodating space 21, the movable piston 10 can move up and down in the accommodating space 21 in the vertical direction, the bottom end of the sampling tube 20 is provided with a sampling tube 22 communicated with the accommodating space 21, the side wall of the sampling tube 20 is provided with a sample outlet tube 23 communicated with the accommodating space 21, the pressure in the accommodating space 21 can be changed when the movable piston 10 moves in the accommodating space 21, so that a sample can enter the accommodating space 21 through the sampling tube 22, and the sample entering the accommodating space 21 is discharged out of the accommodating space 21 through the sample outlet tube 23, and samples in different layers can be extracted through the sampling tube 22, and can extract a plurality of samples in succession in a sample work, solve the sampler and be difficult to extract and sampler capacity is less to the sample of different layering, the technical problem of unable continuous sampling.

Alternatively, in the present embodiment, as shown in fig. 2, the movable piston 10 includes: piston plate 11, go out liquid valve 12, connecting rod 13 and handle 14, wherein, the terminal surface butt of the vertical direction of piston plate 11 is on accommodation space 21's inner wall, be equipped with the intercommunicating pore on the terminal surface of piston plate 11 horizontal direction, the intercommunicating pore runs through whole piston plate 11 in vertical direction, be equipped with out liquid valve 12 on the intercommunicating pore, the one end and the intercommunicating pore of going out liquid valve 12 are connected, the other end and the one end of connecting rod 13 of going out liquid valve 12 are connected, the other end and the handle 14 of connecting rod 13 are connected, can understand, go out liquid valve 12 and piston plate 11 and be connected as a whole, be connected through connecting rod 13 between this holistic part and the handle 14, make piston plate 11 can remove in accommodation space 21 under handle 14 and the.

It should be noted that, in this embodiment, it is preferable that the position of the communication hole is located at the center of the piston plate 11, since the position of the communication hole corresponds to the position of the liquid outlet valve 12, and further corresponds to the positions of the handle 14 and the connecting rod 13, and if the positions of the handle 14 and the connecting rod 13 are located at both ends of the piston plate 11, a moment imbalance occurs when the piston is driven to move, and therefore, the communication hole is located at the center of the piston plate 11.

Alternatively, in this embodiment, the piston plate 11 is configured to move up and down in the accommodating space 21 in the vertical direction under the driving of the connecting rod 13 and the handle 14, and the pressure inside the accommodating space 21 changes during the movement of the piston plate 11, because the accommodating space 21 is a relatively closed space, when the piston plate 11 moves in the accommodating space 21, the air inside the accommodating space 21 is compressed, and the pressure inside the accommodating space 21 is changed, so that a pressure difference occurs between the accommodating space 21 and the outside.

Optionally, in this embodiment, as shown in fig. 3 and 4, a liquid outlet ball 121 is disposed in the liquid outlet valve 12, the liquid outlet valve 12 is of a valve body structure, the liquid outlet valve 12 is mainly used for controlling the opening and closing of the communicating hole, the liquid outlet valve 12 has a ball-shaped liquid outlet ball 121, the diameter of the liquid outlet ball 121 is the same as the aperture of the communicating hole, the liquid outlet ball 121 can be placed in the communicating hole, it can be understood that when the liquid outlet ball 121 is located in the communication hole, the communication hole is blocked by the liquid outlet ball 121, the liquid outlet valve 12 is in a closed state, so that the communication hole is also in a closed state, the air and the sample in the accommodating space 21 cannot move up and down in the accommodating space 21 through the communication hole, when the liquid outlet ball 121 is located outside the communication hole, the liquid outlet valve 12 is in an open state, the communication hole is opened, and the air and the sample inside the accommodating space 21 can move up and down inside the accommodating space 21.

Alternatively, in this embodiment, the piston plate 11 divides the accommodating space 21 into two upper and lower portions, and the piston plate 11 is located in the accommodating space 21 and can move in the accommodating space 21, so that the piston plate 11 necessarily divides the accommodating space 21 into two upper and lower portions, and the housing spaces 21 of the upper and lower portions are communicated through the communication holes of the piston plate 11, so that the air and the sample inside the housing space 21 can move between the upper and lower portions through the communication holes, and the sampling tube 22 communicates the accommodating space 21 at the lower portion of the piston plate 11 with the outside, the sampling tube 23 communicates the accommodating space 21 at the upper portion of the piston with the outside, it can be understood that the sample firstly enters the holding valve at the lower part of the piston plate 11 through the sampling tube 22, then moves to the holding space 21 at the upper part of the piston plate 11 through the communication hole on the piston plate 11, and finally is discharged out of the sampling tube 20 through the liquid outlet tube.

Optionally, in this embodiment, accommodation space 21 is inside still to be equipped with the feed liquor valve, and the feed liquor valve is located accommodation space 21, and the feed liquor valve communicates sampling tube 22 with accommodation space 21, and the feed liquor valve is used for controlling opening and closing of sampling tube 22, and when the feed liquor valve was opened, it could enter into accommodation space 21 through sampling tube 22 to wait to sample.

Optionally, in this embodiment, the structure of feed liquor valve and liquid outlet valve 12 is the same, and the inside of feed liquor valve is equipped with inlet ball 24, and inlet ball 24 is the spheroid structure, and inlet ball 24's diameter is the same with the pipe diameter of sampling tube 22, and when the feed liquor valve was closed, inlet ball 24 can enter into sampling tube 22, makes sampling tube 22 be in the closed state, and when the feed liquor valve was opened, inlet ball 24 came out from inside sampling tube 22, and sampling tube 22 is in the open mode.

Optionally, in this embodiment, the liquid inlet valve and the liquid outlet valve 12 are both one-way valves, specifically, when the piston plate 11 moves inside the accommodating space 21, and when the piston plate 11 moves upward in the vertical direction, at this time, the sampling tube 20 is in the extraction state, the accommodating space 21 located above the piston plate 11 has a reduced volume due to the upward movement of the piston plate 11, the pressure in the accommodating space 21 above becomes high, the liquid outlet ball 121 receives the upper pressure and enters the communicating hole, so that the liquid outlet valve 12 is in the closed state, and the accommodating space 21 located below the piston plate 11 has a volume that becomes high in the lower accommodating space 21, the pressure in the lower accommodating space 21 becomes low, the pressure in the upper accommodating space 21 is higher than the atmospheric pressure outside, and outside air and liquid cannot enter the upper accommodating space 21, and the pressure in the accommodation space 21 of the lower part is less than the external atmospheric pressure, and external air and liquid can enter the accommodation space 21 of the lower part, that is to say, at this moment, the pressure in the oil storage tank is greater than the pressure in the accommodation space 21 of the lower part, the liquid inlet ball 24 in the liquid inlet valve is subjected to the upward force in the lower direction, the liquid inlet ball 24 is jacked up to open the liquid inlet valve, and a sample in the oil storage tank enters the accommodation space 21 of the lower part through the sampling pipe 22 under the action of pressure difference.

It should be noted that, in this embodiment, when the sampling cylinder 20 is in the extraction state, the pressure inside the lower accommodating space 21 is lower than the atmospheric pressure, the sample in the oil storage tank will enter the lower accommodating space 21 through the sampling tube 22 until the lower accommodating space 21 is filled, the pressure inside the lower accommodating space 21 is the same as the atmospheric pressure, at this time, the sample in the lower accommodating space 21 will not flow out to the outside through the sampling tube 22 nor enter the accommodating space 21 with the external sample, the lower accommodating space 21 reaches the pressure balance state, while the upper receiving space 21 is still in a state where the internal pressure is greater than the atmospheric pressure, the external sample cannot enter, the sample in the lower accommodating space 21 cannot enter the upper accommodating space 21 because the liquid outlet valve 12 is closed, and the sample is completely positioned in the lower accommodating space 21.

Alternatively, as shown in fig. 5, in this embodiment, when the piston plate 11 moves vertically downward in the accommodating space 21, the accommodating space 21 located at the upper part of the piston plate 11, as the piston plate 11 moves downward, the volume of the upper accommodating space 21 becomes larger, the pressure inside the upper accommodating space 21 becomes smaller, and the accommodating space 21 located at the lower part of the piston plate 11, as the piston plate 11 moves downward, the volume of the space compressed becomes smaller, the pressure inside the lower accommodating space 21 becomes larger, and the pressure inside the lower accommodating space 21 is higher than the atmospheric pressure, at this time, the liquid inlet ball 24 located inside the lower accommodating space 21 is subjected to the pressure from the inside of the accommodating space 21, the liquid inlet ball 24 enters the sampling tube 22 under the effect of the pressure from the inside to the outside, the sampling tube 22 is closed, and the liquid outlet valve 12 located in the upper accommodating space 21 is also subjected to the pressure of the lower accommodating space 21, the pressure intensity in the upper accommodating space 21 becomes smaller, the pressure intensity in the lower accommodating space 21 is greater than the pressure intensity in the upper accommodating space 21, the liquid outlet ball 121 is subjected to the lower pressure, the liquid outlet ball 121 is ejected out of the communicating hole by the lower pressure, the communicating hole and the liquid outlet valve 12 are in an open state, a sample in the lower accommodating space 21 moves into the upper accommodating space 21 through the communicating hole under the action of pressure difference, and it can be understood that the piston plate 11 is driven to continuously move downwards, the liquid inlet valve is closed, the sample in the lower accommodating space 21 is continuously extruded, the communicating hole is ejected by the pressure, and the sample is extruded into the upper accommodating space 21 through the communicating hole.

Specifically, in this embodiment, the liquid outlet ball 121 is pushed open to open the connecting hole and the liquid outlet valve 12, the upper receiving space 21 causes the sample in the lower receiving space 21 to flow in due to the pressure decreasing, after the sample flows into the upper portion, the sample in the upper receiving space 21 is discharged through the sample outlet pipe 23 on the sidewall of the sampling cylinder 20, that is, when the piston plate 11 moves downward, the sampling cylinder 20 is in a discharge state, and regardless of whether the sampling cylinder 20 is in the discharge state or the extraction state, the liquid inlet valve and the liquid outlet valve 12 are both in a one-way open state, the liquid inlet valve is opened only when the sampling cylinder 20 is in the extraction state, so that the sample enters the lower receiving space 21, and the liquid outlet valve 12 is opened only when the sampling cylinder 20 is in the discharge state, so that the sample sucked into the lower receiving space 21 enters the upper receiving space 21, with this accuracy of sampler barrel 20 when the sample has been guaranteed, that is to say, when sampler barrel 20 carries out continuous sampling in a plurality of different oil layers, the sample that has been extracted can not flow out to the outside of sampler barrel 20, can gain the sample of fixed volume, moreover, sampler barrel 20 is the cartridge container, compares in general sampler, and the capacity is bigger, can once take a sample the operation in, obtains a plurality of samples in succession.

Alternatively, as shown in fig. 6, in this embodiment, the sampling tube 22 and the sampling tube 20 are provided with scales on their outer surfaces, wherein the scales on the outer surface of the sampling tube 20 are used for measuring the volume of the sample sucked into the accommodating space 21, and the scales on the outer surface of the sampling tube 22 are used for measuring the depth of the sample in the tank body, that is, the depth of the nozzle of the sampling tube 22 in the tank body is known according to the scales on the sampling tube 22, for example, if a liquid layer with a depth of 1 m is to be sampled, the sampling tube 22 is extended to a depth of 1 m according to the scales, and then the sample is taken, and at the same time, after each sampling is finished, the scale value of the sampling tube 22 at the tank mouth of the crude oil tank is read, so that the sample taken can be known to represent a specific depth position in the tank, and a delamination phenomenon, that is, gravity difference occurs due to the specific gravity difference of different substances in, the density of water is larger than that of oil, the water is settled to the lower part due to gravity difference), various testing indexes more fitting the actual situation are obtained by judging the sampling depth position, on the other hand, scales are arranged for obtaining the volume of the sample in the tank body at present, the specific operation process is that before sampling, the oil stain on the outer part of the sampling tube 22 is wiped off by a towel, then slowly placing the sampling tube 22 downwards into the tank body to ensure that the bottommost part of the sampling tube 22 is contacted with the sample or completely immersed in the sample (the sampling tube 22 cannot be lifted up in the process), recording the scale positioned at the opening of the tank at the moment after the downward placing is finished, then the sampling tube 22 is slowly pulled out, the scale value of the sample dipped under the sampling tube 22 is read, the difference value of the scale value and the level value is the distance from the liquid level in the tank to the top of the tank, and finally the volume of the sample in the tank can be calculated according to the known cross-sectional area and the known internal height of the tank.

In the description of the present invention, it is to be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A big-tank sampling device, comprising:

the sampling device comprises a sampling cylinder and a movable piston, wherein an accommodating space is formed in the sampling cylinder, the movable piston is positioned in the accommodating space, a sampling tube communicated with the accommodating space is arranged at the bottom end of the sampling cylinder, and a sample outlet tube communicated with the accommodating space is arranged on the side wall of the sampling cylinder;

the movable piston is used for changing the internal pressure in the accommodating space by moving in the accommodating space, so that the solution to be sampled enters the accommodating space through the sampling tube and is discharged out of the accommodating space through the sample outlet tube.

2. The sampling device of claim 1, wherein the moving piston comprises: piston plate, play liquid valve, connecting rod and handle, wherein, the terminal surface butt of the vertical direction of piston plate is in on the inner wall of accommodation space, the intercommunicating pore has been seted up on the terminal surface of piston plate horizontal direction, go out the one end of liquid valve with the intercommunicating pore is connected, go out the other end of liquid valve with the one end of connecting rod is connected, the other end of connecting rod with the handle is connected.

3. A sampler device as claimed in claim 2, wherein the piston plate is adapted to move up and down in a vertical direction within the receiving space upon actuation of the connecting rod and the handle.

4. The sampling device according to claim 3, wherein a liquid outlet ball is arranged in the liquid outlet valve and used for controlling the opening and closing of the communication hole, the liquid outlet ball is clamped in the communication hole when the communication hole is closed, and the liquid outlet ball is positioned outside the communication hole when the communication hole is opened.

5. The sampling device according to claim 4, wherein the piston plate divides the receiving space into upper and lower portions, the sampling tube communicates the receiving space at the upper portion of the piston plate with the outside, and the sampling tube communicates the receiving space at the lower portion of the piston plate with the outside.

6. A sampling device as claimed in claim 5, wherein a liquid inlet valve is provided in the receiving space, and the sampling tube is connected to the receiving space via the liquid inlet valve.

7. The sampling device according to claim 6, wherein a liquid inlet ball is arranged in the liquid inlet valve, when the liquid inlet ball is positioned outside the sampling pipe, the sampling pipe is communicated with the accommodating space, and when the liquid inlet ball is positioned inside the sampling pipe, the sampling pipe is closed with the accommodating space.

8. The sampling device of claim 7, wherein when the piston plate moves upward in the receiving space, the liquid outlet valve is closed, the liquid outlet ball is clamped in the communication hole, the liquid inlet valve is opened, and the solution to be taken enters the receiving space at the lower part of the piston plate through the sampling tube.

9. The sampling device according to claim 8, wherein when the piston plate moves downward in the receiving space, the liquid inlet valve is closed, the liquid inlet ball is clamped in the sampling tube, the liquid outlet valve is opened, and the solution to be sampled in the receiving space enters the receiving space at the upper part of the piston plate through the liquid outlet valve and is discharged out of the receiving space through the sample outlet tube.

10. The sampling device of claim 9, wherein the outer surface of both the sampling tube and the sampling barrel are provided with graduations.

Images