Capsule crushing device for gas chromatography test

Abstract

The utility model discloses a capsule crushing device for gas chromatography testing, which belongs to the technical field of detection and comprises a capsule crushing base, and a first half-thread stepped hole, a first stepped hole, a second stepped hole and a second half-thread stepped hole are sequentially arranged in the capsule crushing base from top to bottom. A first half-thread stepped hole is formed in the middle of the first half-thread stepped hole, air channels correspondingly communicated with the side face of the bottom of the first stepped hole are symmetrically formed in the two sides of the second half-thread stepped hole, threaded holes in threaded fit with a gas chromatograph pipeline connector are formed in the outer ends of the air channels, the second half-thread stepped hole is in threaded fit with a sample injection needle connecting assembly, and the second stepped hole and a capsule crushing base are located in a matched mode. According to the capsule crushing device, the capsule and an internal sample can be simply and thoroughly crushed, the capsule crushing device can be directly connected to a gas chromatograph, sample gas can be tested, standard mixed gas can also be tested, use of parts of the capsule crushing device is reduced to the maximum extent, and the capsule crushing device has good portability.

Description

Technical Field

[0001] The utility model discloses a capsule crushing device for gas chromatography testing, belonging to the field of detection technology. Background Art

[0002] A gas chromatograph is a common analytical device in laboratories. The basic principle of the test is as follows: after separating the target sample through a chromatographic column, different detectors are used to obtain the sample signal, and then qualitative and quantitative analysis of the target sample can be completed based on the test of the standard sample. The conventional test process includes: first, using a syringe to extract the target sample and injecting the target sample into the gas chromatograph through the injection port of the gas chromatograph; then, starting the test and obtaining the corresponding detector signal.

[0003] In recent years, in the field of experimental petrology, more and more researchers have used large chamber presses to simulate the deep - earth environment and then explore the physical and chemical processes of substances under high temperature and high pressure. In these studies, the research on the deep - carbon cycle has attracted particular attention because carbon plays a crucial role in the evolution of the Earth's habitability. Generally, researchers wrap carbon - containing substances in metal capsules and then carry out high - temperature and high - pressure experiments in a large chamber press. During this process, some solid substances are converted into carbon - containing gases. How to accurately analyze these carbon - containing gases is a key step in the research. However, according to the conventional gas chromatograph analysis method, the gas in the metal capsule cannot be extracted by a syringe for testing. Currently, the most commonly used method is to use a sharp needle to pierce the capsule, that is, a capsule piercing device. After the capsule is pierced, the gas will be released from the capsule and blown into the gas chromatograph under the action of the carrier gas, and different detectors are used to complete the signal recording. The Tiraboschi group introduced the capsule piercing device and the sample measurement process. A pressure sensor was installed in this set of capsule piercing devices to detect the release of gas in the capsule. However, it should be noted that the size of the capsules recovered under high temperature and high pressure is generally in millimeters and below, and the amount of gas contained is extremely small, which may result in inaccurate detection of the gas release in the capsule. In addition, in this set of capsule piercing devices, multiple valves and pipelines are used to switch the entry of sample gas and standard gas, which not only increases the volume of the capsule piercing device but also increases the operation steps. Finally, it must be pointed out that this simple piercing technology may cause some gas to remain in the capsule, thus underestimating the amount of gas in the capsule and ultimately leading to inaccurate testing. Moreover, before piercing the capsule, an additional fixing agent needs to be introduced to fix the capsule before piercing can be carried out. This method not only increases the operation steps but also the fixing agent may affect the accuracy of the test. Content of the Utility Model

[0004] The purpose of the present utility model is to solve the problems of incomplete release of the gas inside the capsule and complicated testing in the existing gas chromatography test, and to provide a capsule crushing device for gas chromatography testing.

[0005] The problems to be solved by the present utility model are realized by the following technical solutions:

[0006] A capsule crushing device for gas chromatography testing includes a capsule crushing base. Inside the capsule crushing base, there are successively arranged from top to bottom a first half-threaded stepped hole, a first stepped hole, a second stepped hole, and a second half-threaded stepped hole. On both sides, there are symmetrically arranged air channels corresponding to and communicating with the bottom side of the first stepped hole. The outer end of the air channel is provided with a threaded hole that is threadedly matched with the pipeline interface of the gas chromatograph. The second half-threaded stepped hole is threadedly matched with the injection needle connection assembly. The second stepped hole is used for positioning and cooperating with the capsule crushing seat. The capsule crushing seat includes a first capsule crushing seat and a second capsule crushing seat that can respectively cooperate with the second stepped hole. In the middle of the first capsule crushing seat, there is a circular blind hole. At the bottom of the circular blind hole, there is a first regular prismatic protrusion for capsule crushing. In the middle of the second capsule crushing seat, there is a circular counterbore. On the stepped plane of the circular counterbore, there is a second regular prismatic protrusion with the same structure as the first regular prismatic protrusion. The through hole in the middle of the circular counterbore communicates with the injection needle connection assembly. The first half-threaded stepped hole is connected to the crushing positioning seat assembly and is limited and cooperated through the first stepped hole. In the middle of the crushing positioning seat assembly, there is a T-shaped crushing rod that is threadedly inserted and connected, and the end parts of which can respectively cooperate with the first regular prismatic protrusion and the second regular prismatic protrusion.

[0007] Preferably, the crushing positioning seat assembly includes a crushing fixing seat with an external thread and an internal stepped threaded hole respectively. The crushing fixing seat is connected by the external thread to cooperate with the first internal thread in the first half-threaded stepped hole. The crushing fixing seat is connected by the internal stepped threaded hole to cooperate with the external thread of the crushing support seat. Inside the crushing support seat, there is a flat-thread through hole for threaded connection and cooperation with the flat thread on the outside of the T-shaped crushing rod.

[0008] Preferably, a first gasket is arranged between the outer stepped seat of the crushing fixing seat and the bottom surface of the first stepped hole.

[0009] Preferably, at the end of the T-shaped crushing rod, there is a third regular prismatic protrusion with the same structure as the first regular prismatic protrusion.

[0010] Preferably, a second gasket is arranged between the inner end of the pipeline interface of the gas chromatograph and the bottom of the threaded hole.

[0011] Preferably, the sample injection needle connection assembly includes a sealed air inlet seat respectively cooperating with the bottom step of the second half-threaded stepped hole and the capsule crushing seat, and a sealed end cap cooperating with the second internal thread of the second half-threaded stepped hole. A third sealing gasket is arranged between the sealed end cap and the sealed air inlet seat.

[0012] Preferably, a sealed assembly is arranged between the end of the crushing support seat and the bottom surface of the internal stepped threaded hole of the crushing fixed seat.

[0013] Preferably, the sealed assembly is composed of three first sealed gaskets and two second sealed gaskets which are inserted and cooperated with each other. Two of the first sealed gaskets respectively cooperate with the end of the crushing support seat and the bottom surface of the internal stepped threaded hole of the crushing fixed seat.

[0014] The beneficial effects of the present utility model compared with the prior art are as follows:

[0015] 1. By improving the crushing device, the capsule and the internal sample can be simply and thoroughly crushed.

[0016] 2. The capsule crushing device can be directly connected to a gas chromatograph. In addition to being able to test sample gases, it can also test standard mixed gases.

[0017] 3. The use of components of the capsule crushing device is minimized to the greatest extent, making the capsule crushing device have good portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an isometric view of a capsule crushing device for gas chromatography test of the present utility model.

[0019] Figure 2 is a sectional view of a capsule crushing base of a capsule crushing device for gas chromatography test of the present utility model.

[0020] Figure 3 is an isometric view of a first capsule crushing seat of a capsule crushing device for gas chromatography test of the present utility model.

[0021] Figure 4 is an isometric view of a second capsule crushing seat of a capsule crushing device for gas chromatography test of the present utility model.

[0022] Figure 5 is an isometric view of a T-shaped crushing rod of a capsule crushing device for gas chromatography test of the present utility model.

[0023] Figure 6 is a sectional view of a capsule crushing device for gas chromatography test of the present utility model using a first capsule crushing seat.

[0024] Figure 7It is a sectional view of the second capsule crushing seat adopted in a capsule crushing device for gas chromatography testing of the present utility model.

[0025] Figure 8 It is a usage state diagram of the first capsule crushing seat adopted in a capsule crushing device for gas chromatography testing of the present utility model.

[0026] Figure 9 It is a usage state diagram of the second capsule crushing seat adopted in a capsule crushing device for gas chromatography testing of the present utility model.

[0027] Wherein, 1 - T-shaped crushing rod, 2 - crushing support seat, 3 - crushing fixing seat, 4 - sealing assembly, 5 - second capsule crushing seat, 6 - first capsule crushing seat, 7 - gas chromatograph pipeline interface, 8 - capsule crushing base, 9 - sampling needle connection assembly, 11 - sampling needle connection assembly, 12 - third regular prismatic protrusion, 31 - first sealing gasket, 41 - first sealing gasket, 42 - first sealing pad, 51 - circular counterbore, 52 - second regular prismatic protrusion, 53 - through hole, 61 - circular blind hole, 62 - first regular prismatic protrusion, 71 - second sealing gasket, 81 - first internal thread, 82 - first half-thread stepped hole, 83 - third threaded hole, 84 - second stepped hole, 85 - second half-thread stepped hole, 86 - second internal thread, 87 - air channel, 88 - first stepped hole, 91 - sealing end cover, 92 - sealing end cover, 93 - sealing air inlet seat. Specific embodiments

[0028] The following is a further description of the present utility model according to the attached Figures 1-9 For the present utility model:

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments of the present utility model fall within the scope of protection of the present utility model.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] As Figures 1-7 shown, on the basis of the prior art, the first embodiment of the present utility model provides a capsule crushing device for gas chromatography testing, including a capsule crushing base 8. Inside the capsule crushing base 8, there are successively arranged from top to bottom a first half-threaded stepped hole 82, a first stepped hole 88, a second stepped hole 84, and a second half-threaded stepped hole 85. Air channels 87 corresponding to and communicating with the bottom side of the first stepped hole 88 are symmetrically arranged on both sides thereof. A third threaded hole 83 that is threadedly engaged with the pipeline interface 7 of the gas chromatograph is provided at the outer end of the air channel 87. The second half-threaded stepped hole 85 is threadedly engaged with the injection needle connection assembly 9. The second stepped hole 84 is used for positioning in cooperation with the capsule crushing seat. The capsule crushing seat includes a first capsule crushing seat 6 and a second capsule crushing seat 5 that can be respectively used in cooperation with the second stepped hole 84. A circular blind hole 61 is provided in the middle of the first capsule crushing seat 6. At the bottom of the circular blind hole 61, there is a first regular prismatic protrusion 62 for capsule crushing. A circular counterbore 51 is provided in the middle of the second capsule crushing seat 5. On the stepped plane of the circular counterbore 51, there is a second regular prismatic protrusion 52 having the same structure as the first regular prismatic protrusion 62. The through hole 53 in the middle of the circular counterbore 51 communicates with the injection needle connection assembly 9. The first half-threaded stepped hole 82 is connected to the crushing positioning seat assembly and is limited and cooperated through the first stepped hole 88. A T-shaped crushing rod 1 whose end parts can be respectively used in cooperation with the first regular prismatic protrusion 62 and the second regular prismatic protrusion 52 is threadedly inserted in the middle of the crushing positioning seat assembly.

[0033] The above-mentioned crushing positioning seat assembly includes a crushing fixed seat 3 respectively provided with an external thread and an internal stepped threaded hole. The crushing fixed seat 3 is connected in cooperation with the first internal thread 81 in the first half-threaded stepped hole 82 through the external thread. The crushing fixed seat 3 is in threaded cooperation with the external thread of the crushing support seat 2 through the internal stepped threaded hole. Inside the crushing support seat 2, it is connected in cooperation with the flat-threaded part 11 on the outer side of the T-shaped crushing rod 1 through a flat-threaded through hole.

[0034] In order to achieve better sealing, a first sealing gasket 31 is installed between the outer stepped seat of the crushing fixed seat 3 and the bottom surface of the first stepped hole 88. A second sealing gasket 71 is arranged between the inner end of the gas chromatograph pipeline interface 7 and the bottom surface of the third threaded hole 83. A sealing assembly 4 is installed between the end of the crushing support seat 2 and the bottom surface of the inner stepped threaded hole of the crushing fixed seat 3. The sealing assembly 4 is composed of three first sealing gaskets 42 and two second sealing gaskets 41, wherein the two first sealing gaskets 42 are respectively matched with the end of the crushing support seat 2 and the bottom surface of the inner stepped threaded hole of the crushing fixed seat 3. The first sealing gasket 42 is a polytetrafluoroethylene ring, and the second sealing gasket 41 is a nitrile rubber O-ring, which is close to the round wall of the T-type crushing rod 1, and 8000 mesh molybdenum powder and silicone oil are applied here, so that the T-type crushing rod 1 can move up and down while ensuring the sealing.

[0035] In order to achieve a better crushing effect, a third regular prismatic protrusion 12 having the same structure as the first regular prismatic protrusion 62 is provided at the end of the T-shaped crushing rod 1. The capsule is placed on the first regular prismatic protrusion 62. When the T-shaped crushing rod 1 moves downward, the prismatic protrusions on the upper and lower sides of the capsule will cut, squeeze and scrape the capsule, and finally the capsule and the internal sample are completely crushed. When crushing the capsule, there are requirements for the hardness of the T-shaped crushing rod 1 and the capsule crushing seat, so the material of these two parts is 17-4PH stainless steel.

[0036] The injection needle connection assembly 9 includes a sealed air inlet seat 93 respectively matched with the bottom step of the second semi-threaded stepped hole 85 and the capsule crushing seat, and a sealed end cover 91 matched with the second internal thread 86 of the second semi-threaded stepped hole 85, and a third sealing gasket 92 is installed between the sealing end cover 91 and the sealed air inlet seat 93. The third sealing gasket 92 is a perforated metal gasket, the sealed air inlet seat 93 has a round hole inside, and the sealing end cover 91 is a nitrile rubber plug for sealing. In addition, the injection needle filled with standard gas can inject the standard gas into the capsule crushing base 8 through the sealed air inlet seat 93, the third sealing gasket 92 and the sealed end cover 91, and bring it into the gas chromatograph with the carrier gas.

[0037] Specific use process:

[0038] like Figure 7As shown, place the capsules recovered from high-temperature and high-pressure experiments into the circular blind holes 61. Rotate the T-shaped crushing rod 1 downward until it cannot be rotated further, and repeat this operation three times. Then, slightly rotate and lift part 1 to ensure the connection between the air channels 87. One end of the gas chromatograph pipeline interface 7 is connected to the carrier gas, and the other end is connected to the injection port of the gas chromatograph. After the above crushing operation is completed, the gas released after the capsule is crushed will be blown into the gas chromatograph by the carrier gas. The sample gas will be separated by the chromatographic column, then come to the ion flame detector in turn, and the signal will be recorded. After the test is completed, take out the sample. The metal capsule and the sample wrapped inside have been crushed into powder, ensuring the complete release of the gas. After the test is completed, make a guess based on the signal about which gases are probably contained in the sample.

[0039] Subsequently, qualitatively and quantitatively analyze the sample gas with standard gases and conduct standard gas tests. Replace the first capsule crushing seat 6 with the second capsule crushing seat 5. After the parts are replaced, the standard gas can be injected from the injection needle connection assembly 9 and the through hole 53 into the capsule crushing base 8 between the end of the T-shaped crushing rod 1 and the second regular prismatic protrusion 52 using an injection needle. Ensure the connection between the air channels 87. Similarly, the standard gas will also be blown into the gas chromatograph by the carrier gas. After being separated by the chromatographic column, it will come to the ion flame detector in turn, and the signal will be recorded. After the tests of the sample gas and the standard gas are completed, draw and compare the data. According to the comparison of the peak emergence times, first conduct qualitative analysis on the sample gas, that is, determine the types of gases in the sample gas.

[0040] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples described herein.

Claims

1. A capsule crushing device for gas chromatography testing, characterized in that, It includes a capsule crushing base (8). Inside the capsule crushing base (8), there are successively arranged from top to bottom a first half-threaded stepped hole (82), a first stepped hole (88), a second stepped hole (84), and a second half-threaded stepped hole (85). On both sides thereof, there are symmetrically arranged air channels (87) corresponding to and communicating with the bottom side of the first stepped hole (88). The outer end of the air channel (87) is provided with a third threaded hole (83) threadedly matched with the pipeline interface (7) of the gas chromatograph. The second half-threaded stepped hole (85) is threadedly matched with the injection needle connection assembly (9). The second stepped hole (84) is used for positioning and cooperating with the capsule crushing seat. The capsule crushing seat includes a first capsule crushing seat (6) and a second capsule crushing seat (5) that can respectively cooperate with the second stepped hole (84). In the middle of the first capsule crushing seat (6), there is a circular blind hole (61). At the bottom of the circular blind hole (61), there is a first regular prismatic protrusion (62) for capsule crushing. In the middle of the second capsule crushing seat (5), there is a circular counterbore (51). On the stepped plane of the circular counterbore (51), there is a second regular prismatic protrusion (52) having the same structure as the first regular prismatic protrusion (62). The through hole (53) in the middle of the circular counterbore (51) communicates with the injection needle connection assembly (9). The first half-threaded stepped hole (82) is connected to the crushing and positioning seat assembly and is limited and cooperated through the first stepped hole (88). In the middle of the crushing and positioning seat assembly, there is a T-shaped crushing rod (1) whose end can respectively cooperate with the first regular prismatic protrusion (62) and the second regular prismatic protrusion (52).

2. The capsule crushing device for gas chromatography testing according to claim 1, wherein The crushing and positioning seat assembly includes a crushing fixed seat (3) respectively provided with an external thread and an internal stepped threaded hole. The crushing fixed seat (3) is connected in cooperation with the first internal thread (81) in the first half-threaded stepped hole (82) through the external thread. The crushing fixed seat (3) is in threaded cooperation with the external thread of the crushing support seat (2) through the internal stepped threaded hole. Inside the crushing support seat (2), there is a flat-threaded through hole for threaded cooperation with the flat thread (11) on the outer side of the T-shaped crushing rod (1).

3. The capsule crushing device for gas chromatography testing according to claim 2, characterized in that, A first sealing gasket (31) is arranged between the outer stepped seat of the crushing fixed seat (3) and the bottom surface of the first stepped hole (88).

4. A capsule crushing device for gas chromatography testing according to claim 3, wherein, At the end of the T-shaped crushing rod (1), there is a third regular prismatic protrusion (12) having the same structure as the first regular prismatic protrusion (62).

5. A capsule crushing device for gas chromatography testing according to claim 4, characterized in that, A second sealing gasket (71) is arranged between the inner end of the pipeline interface (7) of the gas chromatograph and the bottom of the third threaded hole (83).

6. The capsule crushing device for gas chromatography testing according to claim 5, characterized in that, The injection needle connection assembly (9) includes a sealed air inlet seat (93) respectively cooperating with the bottom step of the second half-threaded stepped hole (85) and the capsule crushing seat, and a sealed end cap (91) cooperating with the second internal thread (86) of the second half-threaded stepped hole (85). A third sealing gasket (92) is arranged between the sealed end cap (91) and the sealed air inlet seat (93).

7. A capsule crushing device for gas chromatography testing according to claim 6, characterized in that, A sealing assembly (4) is arranged between the end of the crushing support seat (2) and the bottom surface of the internal stepped threaded hole of the crushing fixed seat (3).

8. A capsule crushing device for gas chromatography testing according to claim 7, characterized in that, The sealed assembly (4) is composed of three first sealing gaskets (42) and two second sealing gaskets (41) which are inserted and matched with each other. Among them, the two first sealing gaskets (42) are respectively matched with the end part of the crushing support seat (2) and the bottom surface of the internal stepped threaded hole of the crushing fixing seat (3).

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