CN209820892U

CN209820892U - Sampling and transferring device for hydrate crystal structure test experiment

Info

Publication number: CN209820892U
Application number: CN201920325395.0U
Authority: CN
Inventors: 尉建功; 吴婷婷
Original assignee: Guangzhou Marine Geological Survey
Current assignee: Guangzhou Marine Geological Survey
Priority date: 2019-03-14
Filing date: 2019-03-14
Publication date: 2019-12-20
Anticipated expiration: 2029-03-14

Abstract

The utility model relates to the technical field of auxiliary devices of sampling equipment, in particular to a sampling and transferring device for a hydrate crystal structure test experiment, which can sample hydrate powder in liquid nitrogen; the granularity of the hydrate sample obtained by milling can be controlled; the quantity can be controlled, and the hydrate sample is saved; the grinding device comprises an outer container, a grinding device and a fixing device, wherein an inner cavity is formed in the outer container, and a plurality of groups of through holes are formed in the outer side wall of the outer container; the grinding device also comprises a grinding head, a connecting rod, a right-angle rotating rod and a big turnbuckle; the fixing device also comprises a fixing box, four groups of sawtooth blades, a spring, a fixing sheet, a base, an elastic rope and a pulling button, wherein the top end of the base is provided with a fixing frame.

Description

Sampling and transferring device for hydrate crystal structure test experiment

Technical Field

The utility model relates to a sampling equipment auxiliary device's technical field especially relates to a sample and transfer device for hydrate crystal structure test experiment.

Background

As is well known, a sampling and transferring device for a hydrate crystal structure test experiment is an auxiliary device for sampling samples required by the experiment in the process of the hydrate crystal structure test experiment, and is widely used in the field of sampling equipment; natural gas hydrates are typically formed in marine or lake sediments at water depths of over 600m (Tr uehue et al, 2006), and are also found in formations in polar frozen regions (Uchida et al, 2000). As gas hydrates are an important future energy source (Moridis et al, 2013) and at the same time play an important role in climate change (Kennett et al, 2003), global carbon cycle (Dickens, 2003) and geological disasters (Feseker et al, 2008), increasing attention is being paid to oil companies and the scientific community. Natural gas hydrate is a crystalline compound like ice, with gas molecules wrapped in cages formed by water molecules through hydrogen bonds. Natural gas hydrate is a non-stoichiometric compound represented by G-nH2O, where G and n represent the gas and hydration indices, respectively. The three main types of natural gas hydrates in nature are type I, type II and type H (Sloan, 2003). The gas composition in the hydrate cages ultimately determines the type of hydrate (Uchidaet al, 1999).

The cage occupancy and the hydrate index have important meanings for distinguishing the hydrate types and are also important parameters for calculating the natural hydrate resource amount (Sloan and Koh, 2007). Cage occupancy refers to the ratio of the number of hydrate cages occupied by gas molecules, and is typically used to distinguish the type of hydrate. After obtaining the cage occupancy, the hydration index, i.e., the number of water molecules per gas molecule, can be further calculated. Assuming that all the cages of the hydrate are occupied by gas molecules, hydrate indexes of sI, sII and sH hydrates are 23/4, 17/3 and 17/3, respectively. Currently, laser raman technology and XRD (Lu et al, 2011) are mainly used for testing and analyzing the crystal structure of the hydrate, and these experiments generally need to be performed in a laboratory by using a precise instrument. Because the hydrate can be melted and decomposed at normal temperature, a hydrate sample obtained in nature is generally stored in a liquid nitrogen tank filled with liquid nitrogen, so that the low temperature (-170 ℃) is ensured, and the decomposition is avoided. The samples of this experiment are usually powders and have strict requirements on the particle size of the samples, the experiment needs to be performed at low temperature (Wei et al, 2018), mainly comprising: (1) taking the sample out of the liquid nitrogen tank, and crushing the sample by using a hammer or other blunt instruments; (2) placing the fast-packaged sample in an agate mortar filled with liquid nitrogen for grinding, and placing the rest sample in a liquid nitrogen tank; (3) picking out the hydrate powder meeting the requirement of the granularity by using tweezers or a small spoon; (4) place quickly on the cold stage of the raman testing apparatus (liquid nitrogen sparge, keep low temperature) and start the test.

However, the current hydrate sampling and transferring device and method have serious defects of (1) extremely easy decomposition of a hydrate microcrystal structure, and the method has multiple transfers of the hydrate at room temperature, and although the transfer process has the shortest time, the decomposition of the hydrate is caused inevitably; (2) the hydrate crystal test experiment requires a small amount of powder, so the method for grinding and extracting powder from a whole sample can cause waste of the experimental sample; (3) the trituration process is generally not particle size controlled. Therefore the utility model discloses will give a sampling device design to three problem, when avoiding hydrate sample process to expose in the air, adjust the powder volume of sampling granularity and acquireing. Therefore, the utility model discloses will have whole sampling in the liquid nitrogen, the granularity is controllable and sample quantity characteristics such as few.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a sampling device which can sample hydrate powder in liquid nitrogen; the granularity of the hydrate sample obtained by milling can be controlled; the quantity can be controlled, and the sampling and transferring device for the hydrate crystal structure testing experiment of the hydrate sample can be saved.

The utility model discloses a sampling and transferring device for hydrate crystal structure test experiment, which also comprises an external container, a grinding device and a fixing device, wherein the internal part of the external container is provided with an inner cavity, and the outer side wall of the external container is provided with a plurality of groups of through holes; the grinding device also comprises a grinding head, a connecting rod, a right-angle rotating rod and a big turnbuckle, wherein the bottom end of the connecting rod is connected with the top end of the grinding head, the right-angle rotating rod is connected with the top end of an external container through the big turnbuckle, and the bottom end of the right-angle rotating rod is connected with the top end of the connecting rod; the fixing device further comprises a fixing box, four groups of sawtooth blades, a spring, a fixing piece, a base, an elastic rope and a pulling button, wherein a fixing frame is arranged at the top end of the base, the four groups of sawtooth blades are fixed on the base through the fixing piece, the spring and the elastic rope are all fixed on the base through the fixing frame, the top end of the elastic rope penetrates through the right half area of the top end of the external container and is connected with the pulling button, and the pulling button is fixed on the right half area of the top.

Compared with the prior art, the beneficial effects of the utility model are that: the device is assembled, including selecting a proper grinding head, immersing the device in liquid nitrogen which stores natural gas hydrate, finding the position of a hydrate sample, pulling a pulling button which is connected with a spring rope at the top to open a serrated fixed blade of the fixing device, enabling the hydrate sample to enter from a fixed hole, adjusting to touch a grinding knife, loosening the spring rope to enable the serrated blade to tighten and clamp the sample, manually rotating a rotating rod to grind the sample, taking out a sampling device after the sample is taken, transferring the sample to a measuring instrument which needs to be carried out, completely immersing the whole sampling process in the liquid nitrogen, greatly avoiding the decomposition of the hydrate, meanwhile, the device also has the performance of controllable granularity of a collected powder sample, and on the other hand, compared with a grinding type sampling method, the scraping type sampling method adopted by the device saves the sample more, the hydrate sample is very precious, and the device can save the sample with great strength.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic top view of the fixture;

FIG. 3 is a schematic structural view of a serrated blade;

in the drawings, the reference numbers: 1. an outer container; 2. a grinding head; 3. a connecting rod; 4. a right-angle rotating rod; 5. a big turnbuckle; 6. a fixed box; 7. a serrated blade; 8. a spring; 9. a fixing sheet; 10. a base; 11. an elastic cord; 12. a pulling button; 13. a fixing frame.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 3, the sampling and transferring device for testing the hydrate crystal structure of the present invention further comprises an external container 1, a grinding device and a fixing device, wherein an inner cavity is arranged inside the external container 1, and a plurality of groups of through holes are arranged on the outer side wall of the external container 1; the grinding device also comprises a grinding head 2, a connecting rod 3, a right-angle rotating rod 4 and a big turnbuckle 5, wherein the bottom end of the connecting rod 3 is connected with the top end of the grinding head 2, the right-angle rotating rod 4 is connected with the top end of the external container 1 through the big turnbuckle 5, and the bottom end of the right-angle rotating rod 4 is connected with the top end of the connecting rod 3; the fixing device further comprises a fixing box 6, four groups of serrated blades 7, a spring 8, a fixing sheet 9, a base 10, an elastic rope 11 and a pulling button 12, wherein the fixing frame 13 is arranged at the top end of the base 10, the four groups of serrated blades 7 are fixed on the base 10 through the fixing sheet 9, the fixing blade, the spring 8 and the elastic rope 11 are all fixed on the base 10 through the fixing frame 13, the top end of the elastic rope 11 penetrates through the right half area of the top end of the external container 1 and is connected with the pulling button 12, and the pulling button 12 is fixed on the right half area of the top end; the device is assembled, including selecting a proper grinding head, immersing the device in liquid nitrogen which stores natural gas hydrate, finding the position of a hydrate sample, pulling a pulling button which is connected with a spring rope at the top to open a serrated fixed blade of the fixing device, enabling the hydrate sample to enter from a fixed hole, adjusting to touch a grinding knife, loosening the spring rope to enable the serrated blade to tighten and clamp the sample, manually rotating a rotating rod to grind the sample, taking out a sampling device after the sample is taken, transferring the sample to a measuring instrument which needs to be carried out, completely immersing the whole sampling process in the liquid nitrogen, greatly avoiding the decomposition of the hydrate, meanwhile, the device also has the performance of controllable granularity of a collected powder sample, and on the other hand, compared with a grinding type sampling method, the scraping type sampling method adopted by the device saves the sample more, the hydrate sample is very precious, and the device can save the sample with great strength.

The utility model discloses a sample and transfer device for hydrate crystal structure test experiment, it is at the during operation, carry out the equipment of device, including selecting suitable grinding head, immerse the device among the liquid nitrogen that preserves natural gas hydrate, find the position of hydrate sample, and the pulling of pulling the top connecting spring rope button, make the cockscomb structure fixed blade of fixing device open, the hydrate sample gets into from the fixed orifices, and adjust and make it touch and grind the sword, loosen the spring rope, make the cockscomb structure blade tighten up and clip the sample, manual rotation rotary rod carries out sample grinding, after the sample is got, take out sampling equipment, transfer the sample to the measuring instrument that needs go on, whole sampling process goes on in the liquid nitrogen completely, very big decomposition of hydrate has been avoided, the device still will have the controllable performance of gathering powder sample granularity simultaneously, on the other hand, the scraping type sampling method adopted by the device saves more samples than the grinding type sampling method, the hydrate samples are very precious, and the device can greatly save the samples.

The utility model discloses a sample and transfer device for hydrate crystal structure test experiment, above the mounting means, the connected mode or the mode that sets up of all parts are common mechanical system to concrete structure, model and the coefficient index of all its parts are its from taking the technique, as long as can reach all can implement of its beneficial effect, so do not add at many and give unnecessary details.

A sampling and transfer device for hydrate crystal structure testing experiments of the present invention, where the contrary is not stated, the directional terms "up, down, left, right, front, back, inside, outside, and vertical and horizontal" included in the term merely represent the direction of the term in normal use or are colloquially understood by those skilled in the art and should not be considered as limiting the term, and the numerical terms "first", "second", and "third" do not represent specific quantities or sequences, but are used merely for name differentiation, and the terms "include", or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or also includes such process, A method, article, or apparatus that is inherent to the element.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A sampling and transferring device for a hydrate crystal structure test experiment is characterized by further comprising an external container (1), a grinding device and a fixing device, wherein an inner cavity is formed in the external container (1), and a plurality of groups of through holes are formed in the outer side wall of the external container (1); the grinding device also comprises a grinding head (2), a connecting rod (3), a right-angle rotating rod (4) and a big turnbuckle (5), wherein the bottom end of the connecting rod (3) is connected with the top end of the grinding head (2), the right-angle rotating rod (4) is connected with the top end of the external container (1) through the big turnbuckle (5), and the bottom end of the right-angle rotating rod (4) is connected with the top end of the connecting rod (3); the fixing device further comprises a fixing box (6), four groups of sawtooth blades (7), a spring (8), a fixing sheet (9), a base (10), an elastic rope (11) and a pulling button (12), wherein a fixing frame (13) is arranged at the top end of the base (10), the four groups of sawtooth blades (7) are fixed on the base (10) through the fixing sheet (9), the fixing blade, the spring (8) and the elastic rope (11) are fixed on the base (10) through the fixing frame (13), the top end of the elastic rope (11) penetrates through the right half area of the top end of the external container (1) and is connected with the pulling button (12), and the pulling button (12) is fixed on the right half area of the top end of the external container (1.