Gas chromatograph for analyzing purity of heptafluoropropane fire extinguishing agent

Abstract

The utility model relates to the technical field of purity analysis gas chromatographs, and discloses a heptafluoropropane fire extinguishing agent purity analysis gas chromatograph which comprises an analysis gas chromatograph shell, a box cover plate is installed on the rear portion of the upper surface of the analysis gas chromatograph shell, and an installation cavity is formed in the upper surface of the box cover plate; the stepping motor is arranged in an inner cavity of the mounting cavity, a screw rod is coaxially mounted on a rotor of the stepping motor, a moving rod is rotationally connected to the surface of the screw rod, a mounting plate is mounted at the front end of the moving rod, a hydraulic telescopic rod is mounted on the upper surface of the mounting plate, and a sealing cover is mounted at the bottom end of the hydraulic telescopic rod. And the additionally arranged hydraulic telescopic rod can drive the sealing cover to move downwards, so that the sealing plug is driven to be inserted into the inner cavity of the sample inlet, the heptafluoropropane fire extinguishing agent cannot be discharged through the sample inlet, and the purity analysis accuracy of the heptafluoropropane fire extinguishing agent by the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of purity analysis gas chromatographs, in particular to a purity analysis gas chromatograph for heptafluoropropane fire extinguishing agent. Background Art

[0002] Purity Analysis Gas chromatograph is an efficient and accurate instrument, mainly used to analyze the purity of various gas samples. It separates mixed gases by utilizing the differences in physical properties such as adsorption, desorption and distribution of different substances on the chromatographic column, and measures the concentration of each component through the detector to obtain the purity of the sample.

[0003] Common heptafluoropropane fire extinguishing agents generally need to be analyzed by a purity analysis gas chromatograph after production. In order to accurately analyze the purity of heptafluoropropane fire extinguishing agents, heptafluoropropane fire extinguishing agents are generally injected into the inlet through an injector, and flow into the detector through the inlet to detect the purity of the heptafluoropropane fire extinguishing agent. However, since the heptafluoropropane fire extinguishing agent is a gas, when it flows into the detector through the inlet, some heptafluoropropane fire extinguishing agent will be discharged through the inlet, resulting in a small amount of heptafluoropropane fire extinguishing agent entering the detector, and the purity of the heptafluoropropane fire extinguishing agent cannot be accurately analyzed. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a gas chromatograph for analyzing the purity of heptafluoropropane fire extinguishing agent, so as to solve the problem raised in the above background technology that some heptafluoropropane fire extinguishing agents are discharged through the sampling port, resulting in a small amount of heptafluoropropane fire extinguishing agent entering the detector, and the purity of the heptafluoropropane fire extinguishing agent cannot be accurately analyzed.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model provides the following technical solution: a gas chromatograph for purity analysis of heptafluoropropane fire extinguishing agent, comprising:

[0008] An analytical gas chromatograph housing, wherein a thermostatic chamber door is installed on the front of the analytical gas chromatograph housing, and an injector placement box is installed on the surface of the thermostatic chamber door;

[0009] An operation panel is arranged on the right side of the front of the analytical gas chromatograph housing, an upper cover plate of an electrical gas circuit box is installed on the right side of the upper surface of the analytical gas chromatograph housing, a detector is installed in the middle of the upper surface of the analytical gas chromatograph housing, and a top plate is installed on the left side of the upper surface of the analytical gas chromatograph housing;

[0010] The sample inlet is arranged on the upper surface of the top plate, a box cover is installed at the rear of the upper surface of the shell of the analytical gas chromatograph, and an installation chamber is opened on the upper surface of the box cover;

[0011] A stepper motor is arranged in the inner cavity of the installation chamber. The rotor of the stepper motor is coaxially mounted with a screw rod, the surface of the screw rod is screwed with a moving rod, the front end of the moving rod is mounted with a mounting plate, the upper surface of the mounting plate is mounted with a hydraulic telescopic rod, the bottom end of the hydraulic telescopic rod is mounted with a sealing cover, and the bottom of the sealing cover is mounted with a sealing plug.

[0012] Preferably, a sealing ring is installed in the inner cavity of the injection port, and an air inlet is opened in the middle of the sealing ring, and the opening of the injection port can be narrowed through the air inlet, thereby reducing gas loss.

[0013] Preferably, a sealing edge is installed on the bottom periphery of the sealing cover, and a sealing groove is opened on the upper surface of the top plate. The sealing edge is adapted to the position and size of the sealing groove, and the sealing edge is inserted into the sealing groove to seal the connection between the sealing cover and the injection port.

[0014] Preferably, universal wheels are installed at the four corners of the bottom of the analytical gas chromatograph housing. The universal wheels are common universal wheels with locking functions on the market, which facilitate the movement of the device by the staff.

[0015] Preferably, a slider is installed at the bottom of the moving rod, a slide rail is welded on the upper surface of the bottom plate of the installation chamber, the slider is embedded in the inner cavity of the slide rail, and the slider and the slide rail cooperate to limit the moving rod so that the moving rod can move in a straight line.

[0016] Preferably, connecting plates are installed on both sides of the mounting plate, limiting blocks are installed on the surface of the connecting plates, limiting grooves are provided on the inner walls on both sides of the mounting chamber, and the limiting blocks are embedded in the inner cavity of the limiting grooves. The limiting blocks and the limiting grooves enable the mounting plate to move stably.

[0017] Beneficial Effects

[0018] Compared with the prior art, the utility model provides a gas chromatograph for purity analysis of heptafluoropropane fire extinguishing agent, which has the following beneficial effects:

[0019] The gas chromatograph for purity analysis of heptafluoropropane fire extinguishing agent has an additional stepping motor that can drive the screw to rotate, thereby driving the moving rod to move, and then driving the mounting plate to move, so that the sealing cover is moved above the injection port, and starting the hydraulic telescopic rod can drive the sealing cover to move downward, thereby driving the sealing plug to be inserted into the inner cavity of the injection port, and sealing the injection port, so that the heptafluoropropane fire extinguishing agent will not be discharged through the injection port, and the content of the heptafluoropropane fire extinguishing agent entering the detector will not be reduced, thereby improving the accuracy of the device in analyzing the purity of the heptafluoropropane fire extinguishing agent. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the upper structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the installation chamber of the utility model;

[0023] Figure 4 This is a schematic diagram of the installation structure of the sealing cover of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the box cover of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the top plate of the utility model;

[0026] Figure 7 It is a structural schematic diagram of the sealing cover of the utility model.

[0027] In the figure: 1. Analytical gas chromatograph housing; 2. Constant temperature chamber door; 3. Sample injector placement box; 4. Operation panel; 5. Electrical gas circuit box upper cover; 6. Detector; 7. Top plate; 8. Sample injection port; 9. Box cover; 10. Installation chamber; 11. Stepper motor; 12. Screw rod; 13. Moving rod; 14. Mounting plate; 15. Hydraulic telescopic rod; 16. Sealing cover; 17. Sealing plug; 18. Sealing ring; 19. Air inlet; 20. Sealing edge; 21. Sealing groove; 22. Universal wheel; 23. Sliding block; 24. Slide rail; 25. Connecting plate; 26. Limit block; 27. Limit groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] The utility model provides a technical solution, a gas chromatograph for analyzing the purity of heptafluoropropane fire extinguishing agent, please refer to Figure 1 , comprising an analytical gas chromatograph housing 1, a thermostat door 2 is installed on the front of the analytical gas chromatograph housing 1, and an injector placement box 3 is installed on the surface of the thermostat door 2;

[0030] An operation panel 4 is arranged on the right side of the front of the analytical gas chromatograph housing 1, an electrical gas circuit box upper cover 5 is installed on the right side of the upper surface of the analytical gas chromatograph housing 1, a detector 6 is installed in the middle of the upper surface of the analytical gas chromatograph housing 1, and a top plate 7 is installed on the left side of the upper surface of the analytical gas chromatograph housing 1;

[0031] See also Figure 2 The sample inlet 8 is arranged on the upper surface of the top plate 7, and a box cover plate 9 is installed at the rear of the upper surface of the analytical gas chromatograph housing 1, and an installation chamber 10 is opened on the upper surface of the box cover plate 9;

[0032] See also Figure 3 , the stepper motor 11 is arranged in the inner cavity of the installation chamber 10, see Figure 4 The rotor of the stepper motor 11 is coaxially mounted with a screw rod 12, a moving rod 13 is screwed onto the surface of the screw rod 12, a mounting plate 14 is mounted on the front end of the moving rod 13, a hydraulic telescopic rod 15 is mounted on the upper surface of the mounting plate 14, a sealing cover 16 is mounted on the bottom end of the hydraulic telescopic rod 15, a sealing plug 17 is mounted on the bottom of the sealing cover 16, starting the stepper motor 11 can drive the screw rod 12 to rotate, thereby driving the moving rod 13 to move, and then driving the mounting plate 14 to move, and moving the sealing cover 16 to the top of the injection port 8, starting the hydraulic telescopic rod 15 can drive the sealing cover 16 to move downward, thereby driving the sealing plug 17 to be inserted into the inner cavity of the injection port 8, and sealing the injection port 8, so that the heptafluoropropane fire extinguishing agent will not be discharged through the injection port 8, and the heptafluoropropane fire extinguishing agent content entering the detector 6 will not be reduced, thereby improving the accuracy of the purity analysis of the heptafluoropropane fire extinguishing agent by the device;

[0033] See also Figure 6 The inner cavity of the injection port 8 is provided with a sealing ring 18, and an air inlet 19 is provided in the middle of the sealing ring 18. The air inlet 19 can reduce the opening of the injection port 8, thereby reducing the loss of gas;

[0034] See also Figure 7 The bottom periphery of the sealing cover 16 is provided with a sealing edge 20, see Figure 6 A sealing groove 21 is provided on the upper surface of the top plate 7, and the sealing edge 20 is adapted to the position and size of the sealing groove 21. The sealing edge 20 is inserted into the sealing groove 21, and the connection between the sealing cover 16 and the injection port 8 can be sealed;

[0035] See also Figure 1 Universal wheels 22 are installed at the four corners of the bottom of the analytical gas chromatograph housing 1. The universal wheels 22 are common universal wheels 22 with locking functions on the market. The universal wheels 22 facilitate the movement of the device by the staff;

[0036] See also Figure 4 A slider 23 is installed at the bottom of the moving rod 13, and a slide rail 24 is welded on the upper surface of the bottom plate of the installation chamber 10. The slider 23 is embedded in the inner cavity of the slide rail 24. The slider 23 cooperates with the slide rail 24 to limit the moving rod 13, so that the moving rod 13 can move linearly;

[0037] Both sides of the mounting plate 14 are mounted with connecting plates 25, and the surfaces of the connecting plates 25 are mounted with limit blocks 26, see Figure 5 The inner walls on both sides of the installation chamber 10 are provided with limiting grooves 27, and the limiting blocks 26 are embedded in the inner cavities of the limiting grooves 27. The limiting blocks 26 and the limiting grooves 27 enable the installation plate 14 to move stably.

[0038] The device can first inject HFC-227ea fire extinguishing agent into the detector 6 through the injection port 8. After the HFC-227ea fire extinguishing agent is injected, the stepper motor 11 is started to drive the screw 12 to rotate, thereby driving the moving rod 13 to move, and then driving the mounting plate 14 to move, and moving the sealing cover 16 to the top of the injection port 8. Finally, the hydraulic telescopic rod 15 is started to drive the sealing cover 16 to move downward, thereby driving the sealing plug 17 to be inserted into the inner cavity of the injection port 8, and the injection port 8 is sealed. The sealing edge 20 will also be inserted into the sealing groove 21, and the connection between the sealing cover 16 and the injection port 8 can be sealed, so that the HFC-227ea fire extinguishing agent will not be discharged through the injection port 8, and the content of the HFC-227ea fire extinguishing agent entering the detector 6 will not be reduced, thereby improving the accuracy of the purity analysis of the HFC-227ea fire extinguishing agent by the device.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas chromatograph for analyzing purity of heptafluoropropane fire extinguishing agent, characterized in that: include: An analytical gas chromatograph housing (1), wherein a thermostatic chamber door (2) is installed on the front of the analytical gas chromatograph housing (1), and an injector placement box (3) is installed on the surface of the thermostatic chamber door (2); An operation panel (4) is arranged on the right side of the front of the analytical gas chromatograph housing (1); an electrical gas circuit box upper cover (5) is installed on the right side of the upper surface of the analytical gas chromatograph housing (1); a detector (6) is installed in the middle of the upper surface of the analytical gas chromatograph housing (1); and a top plate (7) is installed on the left side of the upper surface of the analytical gas chromatograph housing (1); The sample inlet (8) is arranged on the upper surface of the top plate (7); a box cover (9) is installed at the rear of the upper surface of the analytical gas chromatograph housing (1); and an installation chamber (10) is opened on the upper surface of the box cover (9); A stepper motor (11) is arranged in the inner cavity of the installation chamber (10); a screw rod (12) is coaxially installed on the rotor of the stepper motor (11); a moving rod (13) is screwed on the surface of the screw rod (12); a mounting plate (14) is installed at the front end of the moving rod (13); a hydraulic telescopic rod (15) is installed on the upper surface of the mounting plate (14); a sealing cover (16) is installed at the bottom end of the hydraulic telescopic rod (15); and a sealing plug (17) is installed at the bottom of the sealing cover (16).

2. A gas chromatograph for analyzing purity of heptafluoropropane fire extinguishing agent according to claim 1, characterized in that: A sealing ring (18) is installed in the inner cavity of the sample inlet (8), and an air inlet (19) is opened in the middle of the sealing ring (18).

3. A gas chromatograph for analyzing purity of heptafluoropropane fire extinguishing agent according to claim 1, characterized in that: A sealing edge (20) is installed on the outer periphery of the bottom of the sealing cover (16), and a sealing groove (21) is opened on the upper surface of the top plate (7), and the position and size of the sealing edge (20) and the sealing groove (21) are matched.

4. A gas chromatograph for analyzing purity of heptafluoropropane fire extinguishing agent according to claim 1, characterized in that: Universal wheels (22) are installed at the four corners of the bottom of the analytical gas chromatograph housing (1), and the universal wheels (22) are universal wheels (22) with locking functions commonly found on the market.

5. A gas chromatograph for analyzing purity of heptafluoropropane fire extinguishing agent according to claim 1, characterized in that: A slider (23) is installed at the bottom of the moving rod (13), a slide rail (24) is welded on the upper surface of the bottom plate of the installation chamber (10), and the slider (23) is embedded in the inner cavity of the slide rail (24).

6. A gas chromatograph for analyzing purity of heptafluoropropane fire extinguishing agent according to claim 1, characterized in that: Connecting plates (25) are installed on both sides of the mounting plate (14), and limiting blocks (26) are installed on the surfaces of the connecting plates (25). Limiting grooves (27) are provided on the inner walls on both sides of the mounting chamber (10), and the limiting blocks (26) are embedded in the inner cavities of the limiting grooves (27).

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