Device for removing fine powder of gas-phase polypropylene chromatographic analyzer

Abstract

The utility model relates to the technical field of fine powder removal of chromatographic analyzers, in particular to a device for removing fine powder of a gas-phase polypropylene chromatographic analyzer, which comprises a gas inlet joint, a first sealing gasket, a connecting sleeve, a second sealing gasket, degreasing cotton and an adapter in threaded connection with the end part of the gas inlet joint, the first sealing gasket is installed between the air inlet connector and the adapter, the connecting sleeve is in threaded connection with the adapter, the second sealing gasket is arranged on the adapter in a sleeving mode and located between the second sealing gasket and the connecting sleeve, and the degreasing cotton is installed in the connecting sleeve. According to the device disclosed by the utility model, the degreasing cotton is mounted in the connecting sleeve, gas enters the second mounting groove through the gas inlet hole, the second gas guide hole and the first gas guide hole, and particles in the gas are adsorbed and removed through the degreasing cotton, so that the filter at the front end and the rear end can be prevented from being blocked, and analysis interruption is avoided; and a chromatographic sampling valve is blocked and leaks air, so that normal analysis and measurement are influenced.

Description

Technical Field

[0001] This utility model relates to the field of fine powder removal technology in chromatographic analyzers, and more specifically, to a device for removing fine powder from a gas phase polypropylene chromatographic analyzer. Background Technology

[0002] In the gas-phase polypropylene process, a small amount of micron-sized PP fine powder may be generated during production due to the polymerization of trace amounts of excessively fine catalyst powder, the short reaction residence time caused by a small amount of catalyst particles going through a short circuit, and the breakage of a small amount of polymer particles during polymerization.

[0003] If fine powder is not properly processed at the front end of the sampling and processing system, it will cause frequent blockage of the front-end sampling pipeline and filter, resulting in analysis interruption. Furthermore, if the fine powder with a small diameter cannot be effectively removed during the sampling and processing process, it will also cause blockage of the end bypass filter and cause the chromatographic sampling valve to jam and leak, rendering it unusable and affecting normal analytical measurements. Utility Model Content

[0004] Based on the aforementioned technical problems regarding "fine powder not being properly processed at the front end of the sampling system can lead to frequent blockages in the front-end sampling pipeline and filter, causing analysis interruptions, and the inability to effectively remove small-diameter fine powder during the sampling process can also cause blockages in the end bypass filter and cause the chromatographic sampling valve to jam and leak, rendering it unusable and affecting normal analytical measurements," this utility model proposes a device for removing fine powder from a gas phase polypropylene chromatograph.

[0005] This utility model proposes a device for removing fine powder from a gas chromatograph (GC) polypropylene analyzer, comprising an inlet connector, a first sealing gasket, a connecting sleeve, a second sealing gasket, degreased cotton, and an adapter threaded to the end of the inlet connector. The first sealing gasket is installed between the inlet connector and the adapter. The connecting sleeve is threaded to the adapter. The second sealing gasket is fitted onto the adapter and located between the second sealing gasket and the connecting sleeve. The degreased cotton is installed inside the connecting sleeve, with its end abutting against the inner wall of the adapter.

[0006] Preferably, the inner wall of the air inlet connector is provided with an air inlet hole, and the inner wall of the air inlet hole is provided with a first internal thread groove.

[0007] Preferably, the adapter has a first external thread at each end, the first external thread at one end of the adapter is threaded to a first internal thread groove, the adapter has a first air guide hole on its inner wall, and a second air guide hole is provided on the inner wall at one end of the first air guide hole.

[0008] Preferably, the inner wall of the air intake connector has a conical protrusion, and the first sealing gasket is fitted on the conical protrusion. The cross-section of the first sealing gasket is a right-angled triangular structure.

[0009] Preferably, the inner wall of the second air guide hole is provided with a conical groove, and the inner wall of the conical groove abuts against the outer wall of the conical protrusion.

[0010] Preferably, a limiting groove is formed on the outer wall of the adapter, and the second sealing gasket is fitted onto the limiting groove.

[0011] Preferably, one end of the connecting sleeve is provided with a second mounting groove, the inner wall of the second mounting groove is provided with a second internal thread groove, the end of the inner wall of the second mounting groove is provided with a vent hole, and the first external thread of the other end of the adapter is threadedly connected to the second internal thread groove.

[0012] Preferably, a first mounting groove is formed on the inner wall of the other end of the first air guide hole, and a positioning groove is formed on the end of the inner wall of the second mounting groove. The positioning groove has a frustum-shaped structure, and the two ends of the degreased cotton abut against the positioning groove and the first mounting groove, respectively.

[0013] Preferably, a support sleeve is fixedly connected to the inner wall of the connecting sleeve, and the degreased cotton is slidably connected inside the support sleeve.

[0014] Preferably, the outer wall of the connecting sleeve is provided with a second external thread, and a fixing nut is threadedly connected to the outer wall of the second external thread. A limit ring is fixedly connected to the end of the connecting sleeve.

[0015] The beneficial effects of this utility model, achieved through the above technical solution, are as follows:

[0016] 1. By installing degreased cotton inside the connecting sleeve, the gas enters the second mounting groove through the air inlet, the second air guide hole, and the first air guide hole. The degreased cotton adsorbs and removes particles in the gas, thereby avoiding clogging of the front and rear filters, interruption of analysis, and jamming and leakage of the chromatographic sampling valve, which would affect normal analytical measurements.

[0017] 2. Insert the absorbent cotton into the support sleeve. The support sleeve supports and fixes the middle part of the absorbent cotton to prevent it from deforming during the filtration process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the air intake connector of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the adapter of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting sleeve of this utility model.

[0022] In the diagram: 1. Air inlet connector; 101. First internal thread groove; 102. Conical protrusion; 103. Air inlet hole; 2. Adapter; 201. Limiting groove; 202. First external thread; 203. First air guide hole; 204. First mounting groove; 205. Second air guide hole; 206. Conical groove; 3. First sealing gasket; 4. Second sealing gasket; 5. Connecting sleeve; 501. Second mounting groove; 502. Second internal thread groove; 503. Positioning groove; 504. Exhaust hole; 505. Second external thread; 506. Limiting ring; 507. Support sleeve; 6. Degreased cotton; 7. Fixing nut. Detailed Implementation

[0023] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model. In this utility model, unless otherwise expressly specified and limited, the term "fixed connection" should be interpreted broadly. For example, "fixed connection" can mean fixed installation, detachable connection, or integral; it can mean mechanical connection or electrical connection; it can mean direct connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] like Figure 1 As shown, a device for removing fine powder from a gas chromatograph (GC) of polypropylene includes an inlet connector 1, a first sealing gasket 3, a connecting sleeve 5, a second sealing gasket 4, degreased cotton 6, and an adapter 2 threadedly connected to the end of the inlet connector 1. The first sealing gasket 3 is installed between the inlet connector 1 and the adapter 2. The connecting sleeve 5 is threadedly connected to the adapter 2. The second sealing gasket 4 is fitted onto the adapter 2 and located between the second sealing gasket 4 and the connecting sleeve 5. The degreased cotton 6 is installed inside the connecting sleeve 5, with its end abutting against the inner wall of the adapter 2. The arrangement of the first sealing gasket 3 and the second sealing gasket 4 can increase the sealing between the structures and prevent gas leakage. The degreased cotton 6 is made from raw cotton through processes such as removing impurities, degreasing, bleaching, washing, drying, and finishing, and has excellent water absorption.

[0025] like Figure 2 As shown, an air inlet 103 is provided on the inner wall of the air inlet connector 1, and a first internal thread groove 101 is provided on the inner wall of the air inlet 103.

[0026] like Figure 3 As shown, the adapter 2 has a first external thread 202 at both ends. The first external thread 202 at one end of the adapter 2 is threadedly connected to the first internal thread groove 101. The adapter 2 has a first air guide hole 203 on its inner wall. The inner wall of the first air guide hole 203 has a second air guide hole 205 on one end of its inner wall.

[0027] like Figures 1-3As shown, the inner wall of the air intake connector 1 has a conical protrusion 102. The first sealing gasket 3 is fitted onto the conical protrusion 102. The cross-section of the first sealing gasket 3 is a right-angled triangular structure. The inner wall of the second air guide hole 205 has a conical groove 206. The inner wall of the conical groove 206 abuts against the outer wall of the conical protrusion 102. The conical protrusion 102 can abut against the conical groove 206. The conical protrusion 102 limits the length of the adapter 2 screwed into the air intake connector 1, so as to avoid the adapter 2 from excessively squeezing the first sealing gasket 3 and causing damage to the first sealing gasket 3.

[0028] like Figure 1 and Figure 3 As shown, a limiting groove 201 is formed on the outer wall of the adapter 2, and the second sealing gasket 4 is fitted on the limiting groove 201.

[0029] like Figure 3 and Figure 4 As shown, a second mounting groove 501 is provided at one end of the connecting sleeve 5, a second internal thread groove 502 is provided on the inner wall of the second mounting groove 501, and a vent hole 504 is provided at the end of the inner wall of the second mounting groove 501. The first external thread 202 at the other end of the adapter 2 is threadedly connected to the second internal thread groove 502.

[0030] like Figure 3 and Figure 4 As shown, a first mounting groove 204 is provided on the inner wall of the other end of the first air guide hole 203, and a positioning groove 503 is provided on the end of the inner wall of the second mounting groove 501. The positioning groove 503 has a frustum-shaped structure, and the two ends of the degreased cotton 6 are respectively abutted in the positioning groove 503 and the first mounting groove 204.

[0031] like Figure 1 and Figure 4 As shown, a support sleeve 507 is fixedly connected to the inner wall of the connecting sleeve 5, and the degreased cotton 6 is slidably connected inside the support sleeve 507.

[0032] like Figure 1 and Figure 4 As shown, the outer wall of the connecting sleeve 5 is provided with a second external thread 505, and a fixing nut 7 is threadedly connected to the outer wall of the second external thread 505. A limit ring 506 is fixedly connected to the end of the connecting sleeve 5.

[0033] Working principle: Connect adapter 2 to the air intake connector 1, with the first sealing gasket 3 abutting between the inner wall of the air intake connector 1 and the end of adapter 2;

[0034] The absorbent cotton 6 is inserted into the support sleeve 507, and the support sleeve 507 supports and fixes the middle part of the absorbent cotton 6 to prevent the absorbent cotton 6 from deforming during the filtration process;

[0035] Connect the connecting sleeve 5 to the adapter 2 so that one end of the degreased cotton 6 is inserted into the inner wall of the first mounting groove 204, and the other end is pressed against the inner wall of the positioning groove 503.

[0036] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for removing fine powder from a gas chromatograph of polypropylene, characterized in that, include: Air intake connector (1), and adapter (2) threaded to the end of air intake connector (1); The first sealing gasket (3) is installed between the air inlet connector (1) and the adapter (2); Connecting sleeve (5), which is threadedly connected to adapter (2); The second sealing gasket (4) is fitted onto the adapter (2) and located between the second sealing gasket (4) and the connecting sleeve (5); Degreased cotton (6) is installed inside the connecting sleeve (5), and its end abuts against the inner wall of the adapter (2).

2. The apparatus for removing fine powder from a gas chromatograph of polypropylene according to claim 1, characterized in that: The air inlet connector (1) has an air inlet hole (103) on its inner wall, and the air inlet hole (103) has a first internal thread groove (101) on its inner wall.

3. The apparatus for removing fine powder from a gas chromatograph of polypropylene according to claim 2, characterized in that: The adapter (2) has a first external thread (202) at both ends. The first external thread (202) at one end of the adapter (2) is threaded to the first internal thread groove (101). The adapter (2) has a first air guide hole (203) on its inner wall. The adapter (2) has a second air guide hole (205) on its inner wall at one end.

4. The apparatus for removing fine powder from a gas chromatograph of polypropylene according to claim 3, characterized in that: The air intake connector (1) has a conical protrusion (102) on its inner wall. The first sealing gasket (3) is fitted onto the conical protrusion (102). The cross-section of the first sealing gasket (3) is a right-angled triangle structure.

5. The apparatus for removing fine powder from a gas chromatograph of polypropylene according to claim 4, characterized in that: The inner wall of the second air guide hole (205) is provided with a conical groove (206), and the inner wall of the conical groove (206) abuts against the outer wall of the conical protrusion (102).

6. The apparatus for removing fine powder from a gas chromatograph according to claim 5, characterized in that: The adapter (2) has a limiting groove (201) on its outer wall, and the second sealing gasket (4) is fitted onto the limiting groove (201).

7. The apparatus for removing fine powder from a gas chromatograph according to claim 6, characterized in that: The connecting sleeve (5) has a second mounting groove (501) at one end, a second internal thread groove (502) on the inner wall of the second mounting groove (501), and a vent hole (504) at the end of the inner wall of the second mounting groove (501). The first external thread (202) at the other end of the adapter (2) is threadedly connected to the second internal thread groove (502).

8. The apparatus for removing fine powder from a gas chromatograph of polypropylene according to claim 7, characterized in that: The inner wall of the other end of the first air guide hole (203) is provided with a first mounting groove (204), and the end of the inner wall of the second mounting groove (501) is provided with a positioning groove (503). The positioning groove (503) is a frustum-shaped structure, and the two ends of the degreased cotton (6) are respectively abutted in the positioning groove (503) and the first mounting groove (204).

9. The apparatus for removing fine powder from a gas chromatograph according to claim 8, characterized in that: The inner wall of the connecting sleeve (5) is fixedly connected to a support sleeve (507), and the degreased cotton (6) is slidably connected inside the support sleeve (507).

10. The apparatus for removing fine powder from a gas chromatograph according to claim 9, characterized in that: The outer wall of the connecting sleeve (5) is provided with a second external thread (505), and a fixing nut (7) is threadedly connected to the outer wall of the second external thread (505). A limit ring (506) is fixedly connected to the end of the connecting sleeve (5).

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