Filtering device for gas chromatograph and gas chromatograph

Abstract

The filtering device structurally comprises a display screen, a filtering pipe, a device box, an analyzer and a chromatographic box, the display screen is fixedly embedded in the side face of the device box, the filtering pipe is connected to the upper end of the interior of the device box through a pipeline, the filtering pipe is connected to the upper end of the chromatographic box through a pipeline, and the analyzer is installed on the side face of the chromatographic box. When sample liquid impacts the stress plate downwards, particle impurities in part of the sample liquid are blocked by the blocking belt, and part of the impurities in the sample liquid move towards the arc-shaped groove in the inner side of the fixing ring, so that the particle impurities are prevented from forming clamping blocking on circulating gaps during filtering, and the sample liquid is prevented from being blocked by the arc-shaped groove in the inner side of the fixing ring. And gas in the carrier gas bottle enters the metal pipe from the position of the drainage pipe through a pipeline, the carrier gas impacts the position of the elastic plate in the inclined direction of the drainage pipe, the impacted gas state is prevented from being mixed and flowing back upwards under the inclined impact force, and dispersion and non-uniformity caused by horizontal impact are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a filtering device for gas chromatographs and the gas chromatograph. Background Art

[0002] The basic structure of a gas chromatograph consists of two parts, namely the analysis unit and the display unit. The analysis unit injects the sample into the heated injection port during analysis to vaporize the mixture, and a filter device is required to filter before vaporization to prevent excessive solid impurities in the liquid from affecting vaporization. The vaporized sample carrier gas then carries the vaporized sample into the chromatographic column, and the different decomposition products are discharged in an orderly manner due to the different flow rates between the different decomposition products, and then the peak value is detected by the controller for analysis.

[0003] However, the gas chromatograph requires carrier gas mixing during vaporization, and a continuous air pressure blowing state is required when the carrier gas and sample liquid are mixed. However, the sample liquid is injected vertically and the carrier gas enters horizontally, which can easily cause the sample liquid to disperse upward and downward, and can easily cause the carrier gas to have a backflow effect on the sample liquid, resulting in uneven force during vaporization. Moreover, when filtering, the sample liquid is screened and filtered using a filter mesh, and its particulate impurities can easily be blocked and stuck in the holes of the filter mesh. When there is too much blockage, it can easily cause blockage to the subsequent injection of the sample liquid, affecting the circulation of the sample liquid. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model is achieved through the following technical solutions: a filtering device for a gas chromatograph and a gas chromatograph, the structure of which includes a display screen, a filter tube, a device box, an analyzer, and a chromatographic box, the display screen is embedded in the side of the device box, the filter tube pipeline is connected to the upper end of the device box, the filter tube pipeline is connected to the upper end of the chromatographic box, the analyzer is installed on the side of the chromatographic box, and the analyzer is connected to the internal circuit of the chromatographic box, the filter tube is provided with a vaporization mechanism, a connecting plate, a metal tube, a filtering device, and a circulation tube, the vaporization mechanism is embedded in the metal tube, the filtering device is clamped on the inner side of the lower end of the circulation tube, the lower end of the circulation tube is threadedly connected to the upper end of the metal tube, the connecting plate is embedded in the inner side of the circulation tube, the metal tube is installed at the upper end of the chromatographic box, and uniformly distributed circular gaps are provided between the connecting plates, which has the effect of limiting the passage.

[0005] As a further optimization of the present technical solution, the filtering device is provided with a ball block, a sector plate, a fixing ring, and a connecting rod. The sector plate is embedded in the lower inner end of the connecting rod, the fixing ring is welded to the outer side of the ball block, the ball block is installed on the inner side of the fixing ring, the outer side of the sector plate and the inner side of the fixing ring are clearance-matched, the fixing ring is engaged with the inner side of the lower end of the circulation tube, an arc groove is provided on the inner side of the fixing ring, and the arc groove is slightly higher than the outer end of the sector plate, and four sector plates are provided, which are evenly distributed in a ring with the ball block as the center.

[0006] As a further optimization of the present technical solution, the fan-shaped plate is provided with a deformation strip, a rotating rod, an arresting belt, and a force-bearing plate. The deformation strip is embedded in the surface of the force-bearing plate, the deformation strip is installed at the upper end of the force-bearing plate, the rotating rod is embedded in the left side of the force-bearing plate, the upper end of the deformation strip is embedded in the inner lower end of the connecting rod, the rotating rod is installed on the outer side of the ball block, the deformation strip is made of rubber and has the characteristic of easy stretching and deformation, the arresting belt is a triangular structure, and the right-angled side is located on the left side.

[0007] As a further optimization of the present technical solution, the vaporization mechanism is provided with a drainage tube, an elastic plate, and a diverter plate. The elastic plate is embedded in the lower end of the diverter plate, the drainage tube is installed on the side of the diverter plate, the drainage tube is embedded in the left side of the metal tube, the diverter plate is installed on the inner side of the metal tube, four elastic plates are provided, arranged horizontally, and the elastic plates are distributed in a state of increasing length from left to right, and the drainage tube is inclined at 30 degrees.

[0008] As a further optimization of the present technical solution, a carrier gas bottle is provided inside the device box, which is connected to the left pipe of the vaporization mechanism; a sample box is provided inside the device box, which is connected to the upper pipe of the circulation tube; a chromatographic column is provided inside the chromatographic box, and the lower end of the metal tube is connected to the upper pipe on the left side of the chromatographic column; a detector is provided at the upper right end of the chromatographic column, and the detector is connected to the analyzer circuit. Beneficial Effects

[0009] Compared with the prior art, the utility model of a filtering device for a gas chromatograph and a gas chromatograph have the following advantages:

[0010] In the utility model, when the sample liquid flows downward from the filter device in the flow tube, the sample liquid is squeezed onto the surrounding fan-shaped plates under the guidance of the ball block under pressure, and then a part of the impurities in the sample liquid moves to the arc groove on the inner side of the fixed ring, and then under the flow force of the sample liquid toward the outer end of the fan plate, the particle impurities are retained in the arc groove on the inner side of the fixed ring, thereby achieving the effect of filtering the particle impurities.

[0011] When the sample liquid impacts the force-bearing plate downward in the utility model, the surface of the force-bearing plate is subjected to force and rotates downward with the rotating rod as the center. Under the elastic force of the deformation strip, the sample liquid elastically flows outward on the surface of the force-bearing plate, and then particulate impurities in a part of the sample liquid are blocked by the blocking belt, and then the filtered sample liquid flows downward from the gap between the fan-shaped plate and the inner side of the fixed ring, preventing the particulate impurities during filtration from forming a card-blocking blockage on the flow gap.

[0012] In the utility model, the gas in the carrier gas bottle enters the metal tube from the drainage tube through the pipeline, and then the sample liquid is diverted at the diverter plate when flowing downward from the metal tube, so that the sample liquid flows downward evenly from the gap between the elastic plates, and the sample liquid is subjected to layered force under the guidance of the elastic plates at different heights. The carrier gas impacts the elastic plate position obliquely in the drainage tube, so that the sample liquid is dispersed into a vapor state under the pressure impact of the carrier gas and flows downward, and the vapor state after the impact is prevented from mixing and flowing back upward under the oblique impact force, so as to avoid uneven dispersion caused by horizontal impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0014] Figure 1 The utility model is a filtering device for a gas chromatograph and a schematic diagram of the structure of the gas chromatograph.

[0015] Figure 2 It is a side structural schematic diagram of a filter tube of the utility model.

[0016] Figure 3 The utility model is a schematic diagram of the planar structure of a filtering device.

[0017] Figure 4 It is a three-dimensional structural schematic diagram of a fan-shaped plate of the utility model.

[0018] Figure 5 It is a side structural schematic diagram of a vaporization mechanism of the utility model.

[0019] In the figure: display screen-1, filter tube-2, device box-3, analyzer-4, chromatographic box-5, vaporization mechanism-21, connecting plate-22, metal tube-23, filter device-24, flow tube-25, ball block-w1, fan plate-w2, fixing ring-w3, connecting rod-w4, deformation strip-w21, rotating rod-w22, blocking belt-w23, force plate-w24, drainage tube-t1, elastic plate-t2, diverter plate-t3. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the preferred implementation scheme of the present invention is further described below in conjunction with specific implementation schemes and accompanying drawings. Example

[0021] See also Figure 1-Figure 5 The utility model provides a filtering device for a gas chromatograph and a gas chromatograph, the structure of which includes a display screen 1, a filter tube 2, a device box 3, an analyzer 4, and a chromatographic box 5. The display screen 1 is embedded in the side of the device box 3, the filter tube 2 is connected to the upper end of the device box 3, the filter tube 2 is connected to the upper end of the chromatographic box 5, the analyzer 4 is installed on the side of the chromatographic box 5, and the analyzer 4 is connected to the internal circuit of the chromatographic box 5. The filter tube 2 is provided with a vaporization mechanism 21, a connecting plate 22, a metal tube 23, a filtering device 24, and a flow tube 25. The vaporization mechanism 21 is embedded in the metal tube 23, the filtering device 24 is engaged with the inner side of the lower end of the flow tube 25, and the lower end of the flow tube 25 is connected to the metal tube 23. The upper end is threadedly connected, and the connecting plate 22 is embedded in the inner side of the circulation tube 25. The metal tube 23 is installed at the upper end inside the chromatographic box 5. There are evenly distributed circular gaps between the connecting plates 22, which have the effect of limiting the passage, so that the sample box inside the device box 3 discharges the sample liquid to the upper end of the circulation tube 25, and moves evenly to the filter device 24 through the connecting plate 22. After filtering at the position of the filter device 24, it flows into the metal tube 23 below. At the same time, the carrier gas bottle in the device box 3 sprays gas to vaporize and mix the sample liquid inside the metal tube 23, and then the vaporized sample liquid enters the chromatographic column in the chromatographic box 5 from below the metal tube 23 for separation, so that the detector in the chromatographic box 5 is controlled by the analyzer 4 for analysis and processing.

[0022] The filtering device 24 is provided with a ball block w1, a sector plate w2, a fixing ring w3, and a connecting rod w4. The sector plate w2 is embedded in the lower inner end of the connecting rod w4, the fixing ring w3 is welded to the outer side of the ball block w1, the ball block w1 is installed on the inner side of the fixing ring w3, the outer side of the sector plate w2 and the inner side of the fixing ring w3 are clearance-matched, the fixing ring w3 is clamped on the inner side of the lower end of the circulation tube 25, the inner side of the fixing ring w3 is provided with an arc groove, and the arc groove is slightly higher than the outer end of the sector plate w2, the sector plate w2 is provided with an arc groove, and ... There are four plates w2, which are evenly distributed in a ring shape with the ball w1 as the center, so that the sample liquid is squeezed from the ball w1 to the surrounding fan-shaped plates w2 under pressure, and then part of the particulate impurities in the sample liquid are blocked on the surface of the fan-shaped plate w2 under the downward flow force, and part of the impurities flow to the arc groove on the inner side of the fixed ring w3, and then under the flow force of the sample liquid to the outer end of the fan plate w2, the particulate impurities remain in the arc groove on the inner side of the fixed ring w3, thereby achieving the effect of filtering the particulate impurities.

[0023] The fan-shaped plate w2 is provided with a deformation strip w21, a rotating rod w22, a blocking strip w23, and a force-bearing plate w24. The deformation strip w21 is embedded in the surface of the force-bearing plate w24, the deformation strip w21 is installed at the upper end of the force-bearing plate w24, the rotating rod w22 is embedded on the left side of the force-bearing plate w24, the upper end of the deformation strip w21 is embedded in the lower end of the inner side of the connecting rod w4, the rotating rod w22 is installed on the outer side of the ball block w1, the deformation strip w21 is made of rubber and has the characteristic of easy stretching and deformation, the blocking strip w23 is a triangular structure, and the right angle side is located on the left side, As a result, the sample liquid impacts the force-bearing plate w24 downward, causing the force-bearing plate w24 to rotate downward with the rotating rod w22 as the center. Under the elastic force of the deformation strip w21, the sample liquid elastically flows outward on the surface of the force-bearing plate w24, and then some of the granular impurities in the sample liquid are blocked by the blocking strip w23, and another part of the granular impurities move outward on the force-bearing plate w24 and are pushed into the arc groove on the inner side of the fixed ring w3. Then, the filtered sample liquid flows downward from the gap between the fan-shaped plate w2 and the inner side of the fixed ring w3, preventing the granular impurities from forming a card-blocking blockage to the flow gap during filtration.

[0024] The vaporization mechanism 21 is provided with a drainage pipe t1, an elastic plate t2, and a diverter plate t3. The elastic plate t2 is embedded at the lower end of the diverter plate t3. The drainage pipe t1 is installed on the side of the diverter plate t3. The drainage pipe t1 is embedded on the left side of the metal tube 23. The diverter plate t3 is installed on the inner side of the metal tube 23. Four elastic plates t2 are arranged horizontally, and the elastic plates t2 are distributed in a state of increasing length from left to right. The drainage pipe t1 is tilted at 30 degrees, so that the gas in the carrier gas bottle is discharged from the drainage pipe through the pipeline. The sample liquid enters the metal tube 23 at position t1, and then the sample liquid is diverted at position t3 when flowing downward from the metal tube 23, so that the sample liquid flows downward evenly from the gap between the elastic plates t2, and the sample liquid is subjected to layered force under the guidance of the elastic plates t2 at different heights. The carrier gas impacts the elastic plate t2 at an angle in the drainage tube t1, so that the sample liquid is dispersed into a vapor state under the pressure impact of the carrier gas and flows downward. The inclined impact force prevents the vapor state from mixing and flowing back upward after the impact, and avoids uneven dispersion caused by horizontal impact.

[0025] A carrier gas bottle is provided inside the device box 3, and the carrier gas bottle is connected to the left pipe of the vaporization mechanism 21. A sample box is provided inside the device box 3, and the sample box is connected to the upper pipe of the flow tube 25. A chromatographic column is provided inside the chromatographic box 5, and the lower end of the metal tube 23 is connected to the upper pipe on the left side of the chromatographic column. At the same time, a detector is provided at the upper right end of the chromatographic column, and the detector is connected to the analyzer 4 line.

[0026] Working principle: In the utility model, the sample box inside the device box 3 discharges the sample liquid to the upper end of the circulation tube 25, and moves evenly to the filter device 24 through the connecting plate 22. After filtering at the position of the filter device 24, it flows into the metal tube 23 below. At the same time, the carrier gas bottle in the device box 3 sprays gas to vaporize and mix the sample liquid inside the metal tube 23, and then the vaporized sample liquid enters the chromatographic column in the chromatographic box 5 from the bottom of the metal tube 23 for separation, so that the detector in the chromatographic box 5 is controlled by the analyzer 4 for analysis and processing. When the sample liquid flows downward from the position of the filter device 24 in the circulation tube 25, the sample liquid is squeezed onto the surrounding fan-shaped plates w2 under the obstruction and guidance of the ball block w1 under pressure, and then a part of the particulate impurities in the sample liquid is blocked on the surface of the fan-shaped plate w2 under the downward flow force, and a part of the impurities moves to the arc groove on the inner side of the fixed ring w3, and then under the flow force of the sample liquid toward the outer end of the fan plate w2, the particulate impurities are retained in the arc groove on the inner side of the fixed ring w3, thereby achieving the effect of filtering the particulate impurities.

[0027] In the utility model, when the sample liquid impacts the force-bearing plate w24 downward, the surface of the force-bearing plate w24 is subjected to force and rotates downward with the rotating rod w22 as the center. Under the elastic force of the deformation strip w21, the sample liquid elastically flows outward on the surface of the force-bearing plate w24, and then part of the granular impurities in the sample liquid are blocked by the blocking belt w23, and another part of the granular impurities move outward on the force-bearing plate w24 and are pushed into the arc groove on the inner side of the fixed ring w3. Then, the filtered sample liquid flows downward from the gap between the fan-shaped plate w2 and the inner side of the fixed ring w3, preventing the granular impurities from forming a card-blocking blockage on the flow gap during filtration.

[0028] In the utility model, the gas in the carrier gas bottle enters the metal tube 23 from the drainage tube t1 through the pipeline, and then the sample liquid is diverted at the diverter plate t3 when flowing downward from the metal tube 23, so that the sample liquid flows downward evenly from the gap between the elastic plates t2, and the sample liquid is subjected to layered force under the guidance of the elastic plates t2 at different heights. The carrier gas impacts the elastic plate t2 at an angle in the drainage tube t1, so that the sample liquid is dispersed into a vapor state under the pressure impact of the carrier gas and flows downward. The vapor state after the impact is prevented from mixing and flowing back upward under the inclined impact force, and the uneven dispersion caused by the horizontal impact is avoided.

[0029] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit or basic features of the utility model, the utility model can be implemented in other specific forms and various changes and improvements can be made. These changes and improvements all fall within the scope of the utility model to be protected. Therefore, the scope of protection of the utility model is defined by the attached claims and their equivalents, rather than the above description.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A filtering device for a gas chromatograph and a gas chromatograph, the structure of which comprises a display screen (1), a filter tube (2), a device box (3), an analyzer (4), and a chromatographic box (5), characterized in that: The display screen (1) is embedded in the side of the device box (3), the filter tube (2) is connected to the upper end of the device box (3), the filter tube (2) is connected to the upper end of the chromatographic box (5), the analyzer (4) is installed on the side of the chromatographic box (5), and the analyzer (4) is connected to the internal circuit of the chromatographic box (5); The filter tube (2) is provided with a vaporization mechanism (21), a connecting plate (22), a metal tube (23), a filtering device (24), and a circulation tube (25); the vaporization mechanism (21) is embedded in the metal tube (23); the filtering device (24) is engaged with the inner side of the lower end of the circulation tube (25); the lower end of the circulation tube (25) is threadedly connected to the upper end of the metal tube (23); the connecting plate (22) is embedded in the inner side of the circulation tube (25); and the metal tube (23) is installed at the upper end of the inside of the chromatographic box (5).

2. A filtering device for a gas chromatograph and a gas chromatograph according to claim 1, characterized in that: The filtering device (24) is provided with a ball block (w1), a sector plate (w2), a fixing ring (w3), and a connecting rod (w4); the sector plate (w2) is embedded in the lower end of the inner side of the connecting rod (w4); the fixing ring (w3) is welded to the outer side of the ball block (w1); the ball block (w1) is installed on the inner side of the fixing ring (w3); the outer side of the sector plate (w2) and the inner side of the fixing ring (w3) are clearance-matched; and the fixing ring (w3) is engaged with the inner side of the lower end of the flow tube (25).

3. A filtering device for a gas chromatograph and a gas chromatograph according to claim 2, characterized in that: The fan-shaped plate (w2) is provided with a deformation strip (w21), a rotating rod (w22), a blocking strip (w23), and a force-bearing plate (w24); the deformation strip (w21) is embedded in the surface of the force-bearing plate (w24); the deformation strip (w21) is installed at the upper end of the force-bearing plate (w24); the rotating rod (w22) is embedded in the left side of the force-bearing plate (w24); the upper end of the deformation strip (w21) is embedded in the lower end of the inner side of the connecting rod (w4); and the rotating rod (w22) is installed on the outer side of the ball block (w1).

4. The filtering device for gas chromatograph and the gas chromatograph according to claim 1, characterized in that: The vaporization mechanism (21) is provided with a drainage tube (t1), an elastic plate (t2), and a diverter plate (t3); the elastic plate (t2) is embedded in the lower end of the diverter plate (t3); the drainage tube (t1) is installed on the side of the diverter plate (t3); the drainage tube (t1) is embedded in the left side of the metal tube (23); and the diverter plate (t3) is installed on the inner side of the metal tube (23).

5. The filtering device for gas chromatograph and the gas chromatograph according to claim 1, characterized in that: A carrier gas bottle is provided inside the device box (3), and the carrier gas bottle is connected to the left pipeline of the vaporization mechanism (21). A sample box is provided inside the device box (3), and the sample box is connected to the upper pipeline of the flow tube (25). A chromatographic column is provided inside the chromatographic box (5), and the lower end of the metal tube (23) is connected to the upper pipeline on the left side of the chromatographic column. A detector is provided at the upper right end of the chromatographic column, and the detector is connected to the analyzer (4) circuit.

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