Portable gas chromatographic analysis device with pipeline storage function

Abstract

The utility model belongs to the technical field of gas chromatography detection, and discloses a portable gas chromatography analysis device with a pipeline storage function, which comprises a sample gas detection assembly and a chromatographic column communicated with the sample gas detection assembly through a gas pipe, and further comprises a winding assembly, the winding assembly comprises a winding disc, the winding disc comprises a first winding disc and a second winding disc, and the winding disc is connected with the sample gas detection assembly through a gas pipe. The first winding disc and the second winding disc are coaxially and fixedly connected through a fixing shaft. The supporting disc is rotationally connected with the first winding disc, and a plurality of through grooves are formed in the supporting disc in the circumferential direction of the circle center of the supporting disc; the number of the supporting plates is multiple, and the supporting plates are arranged in the through grooves in a sliding mode; the driving unit is used for driving the supporting plate to slide in the through groove; according to the scheme, the distance between each supporting plate and the circle center of the supporting disc is adjusted through the driving unit, and a diameter-variable winding space is formed; the portable gas chromatographic analysis device solves the problem that an existing gas chromatographic analysis device is poor in portability.

Description

TECHNICAL FIELD

[0001] The scheme belongs to the technical field of gas chromatography detection, and particularly relates to a portable gas chromatography analysis device with pipeline storage. BACKGROUND

[0002] As a core equipment in a power grid system, a large power transformer bears a key role of energy conversion and transmission, and its operation condition and health level have a direct influence on the safety and stability of the power grid. Through gas chromatography analysis of components and content of dissolved gas in insulating oil, an important means for detecting and diagnosing internal latent faults of an oil-immersed transformer has been formed.

[0003] Referring to the document with the existing publication (announcement) No. CN106290664A, a gas separation and detection device in insulating oil is disclosed, which comprises a box body, a built-in heating furnace, a sample gas separation mechanism and a sample gas detection mechanism, the sample gas separation mechanism and the sample gas detection mechanism are connected through a gas pipe, the sample gas separation mechanism comprises a three-way flow divider and two chromatographic columns, one end of the three-way flow divider is connected with the sample gas pipe, and the other two ports are connected with the chromatographic column one and the chromatographic column two, the two chromatographic columns are spirally wound and placed on the heating furnace; the sample gas detection mechanism is accommodated in the heating furnace, and the sample gas detection mechanism comprises two groups of detection components, and one group of detection components is connected with one chromatographic column; the box body is also provided with heat preservation cotton.

[0004] The chromatographic column is communicated with the sample gas detection mechanism through the gas pipe, and the pipeline of the gas pipe is long, and a fixed spiral disc structure is adopted, although the long pipeline can be stored in a coiled manner, the coiled radius of the spiral structure is fixed and cannot be adjusted, so that the pipeline length and the storage space are rigidly bound, when the pipeline is long, a larger coiled area is occupied, and the fixed coiled structure cannot adjust the pipeline unfolding length or the storage range according to the actual detection scene, so it is difficult to meet the portable demand. UTILITY MODEL CONTENT

[0005] The purpose of the scheme is to provide a portable gas chromatography analysis device with pipeline storage, so as to solve the problem of poor portability of the existing gas chromatography analysis device.

[0006] In order to achieve the above purpose, the scheme provides a portable gas chromatography analysis device with pipeline storage, which comprises a sample gas detection component and a chromatographic column, the chromatographic column is communicated with the sample gas detection component through a gas pipe, and further comprises a winding component, the winding component comprises:

[0007] A winding disc, the winding disc comprises a first winding disc and a second winding disc, the first winding disc and the second winding disc are coaxially fixedly connected through a fixed shaft;

[0008] A support disc is rotationally connected with the first winding disc, and a plurality of through grooves are formed in the support disc along the circumferential direction of the center of the support disc;

[0009] A plurality of support plates are slidably arranged in the through grooves, respectively;

[0010] A driving unit is configured to drive the support plates to slide in the through grooves.

[0011] The principle and effect of the present application are that the sliding of the support plates in the through grooves of the support disc is controlled by the driving unit, the distance between each support plate and the center of the support disc is adjusted, and a winding space with a variable diameter is formed. When the pipeline is long, the driving unit pushes the support plates to expand outward to increase the accommodation diameter, so as to avoid the redundant pipeline accumulation and volume expansion caused by the fixed disc winding radius. Conversely, in the case of short pipeline or narrow space, the support plates are retracted to compress the accommodation space. The present application solves the problem of poor portability caused by the long pipeline in the existing gas chromatographic analysis device.

[0012] Further, the driving unit comprises a bevel gear and a lead screw, the support disc is coaxially rotationally connected with a bevel gear, the bevel gear is engaged with the bevel gear, the bevel gear is coaxially fixedly connected with the lead screw, the two ends of the lead screw are rotationally connected with the through grooves, respectively, the support plate is provided with a sliding block, and the sliding block is threadedly connected with the lead screw.

[0013] The principle and effect of the present application are that when the bevel gear is rotated by an external driving force, the support disc is synchronously rotated through the engagement; at the same time, the bevel gear is coaxially fixed with the lead screw, and the two ends of the lead screw form a rotational pair with the through grooves of the support disc, so that the lead screw rotates while the support disc revolves. The sliding block is driven to slide along the lead screw in the axial direction in the process of the rotation of the lead screw, so as to push the support plate to move radially in the through groove, and then adjust the distance between the support plate and the center of the support disc, and adjust the diameter of the winding space.

[0014] Further, a sliding groove is formed in the side wall of the through groove for guiding the support plate, the side wall of the support plate is slidably connected with the sliding groove, and the contact surface of the support plate and the air pipe is an arc surface.

[0015] The principle and effect of the present application are that the sliding groove is used for positioning and guiding the movement of the support plate, and the arc-shaped support plate guides the natural bending of the pipeline.

[0016] Further, the filter assembly comprises a filter screen, the filter screen is arranged in the air pipe, and located at the rear end of the chromatographic column.

[0017] The principle and effect of the scheme are that when the chromatographic column collects gas in transformer oil, metal debris and dust generated by friction of the oil pump and the tap switch contact in long-term operation can easily block the chromatographic column or the detector pipeline, and more importantly, can cause deviation of the detection result. Therefore, the scheme sets a filter screen in the gas pipe at the rear end of the chromatographic column to intercept the metal debris and dust impurities generated by friction of the oil pump and the tap switch contact, so that the chromatographic detection data is more accurate.

[0018] Further, the filter assembly further comprises a cleaning unit, the cleaning unit comprises a cleaning chamber and a fan blade, the cleaning chamber is arranged below the filter screen, the gas pipe is provided with a clamping groove, the filter screen passes through the clamping groove, and the cleaning chamber is in communication with the clamping groove, the fan blade is rotatably arranged in the cleaning chamber, the fan blade is provided with a knocking block, the filter screen is provided with a protruding block matched with the knocking block, and the filter assembly further comprises a first driving module for driving the fan blade to rotate and a second driving module for driving the filter screen to move into the cleaning chamber.

[0019] The principle and effect of the scheme are that when the chromatographic column collects gas in transformer oil, metal debris and dust generated by friction of the oil pump and the tap switch contact in long-term operation can easily block the chromatographic column or the detector pipeline, and more importantly, can cause deviation of the detection result. Therefore, the scheme sets a filter screen in the gas pipe at the rear end of the chromatographic column to intercept the metal debris and dust impurities generated by friction of the oil pump and the tap switch contact, so that the chromatographic detection data is more accurate.

[0020] Further, the first driving module comprises a cam, an air pump and a gas storage chamber, the cam is coaxially fixedly connected with the winding disc, the air pump is arranged on the supporting disc, the cam and the air pump are matched, the gas outlet end of the air pump is in communication with the gas storage chamber, the gas storage chamber is connected with a gas supply pipe, the gas supply pipe is provided with an exhaust valve, the tail end of the gas supply pipe is rotatably connected with the fan blade, the blade of the fan blade is provided with a cavity, and the blade of the fan blade is provided with an exhaust hole, the exhaust hole is in communication with the cavity, the cavity is in communication with the gas supply pipe, and the exhaust hole is an inclined exhaust hole.

[0021] The principle and effect of the scheme are that when the chromatographic column collects gas in transformer oil, metal debris and dust generated by friction of the oil pump and the tap switch contact in long-term operation can easily block the chromatographic column or the detector pipeline, and more importantly, can cause deviation of the detection result. Therefore, the scheme sets a filter screen in the gas pipe at the rear end of the chromatographic column to intercept the metal debris and dust impurities generated by friction of the oil pump and the tap switch contact, so that the chromatographic detection data is more accurate.

[0022] Further, the second driving module comprises an electromagnet and a permanent magnet, the electromagnet is arranged on the cleaning chamber, the permanent magnet is arranged on the filter screen, the electromagnet is electrified to attract the permanent magnet, the filter screen is connected with a spring, and a free end of the spring is connected with the cleaning chamber.

[0023] The principle and effects of the scheme are that when the filter screen needs to be cleaned, the electromagnet is electrified to generate a magnetic field attracting the permanent magnet, the filter screen is driven to move to the cleaning chamber through magnetic force, and the metal particles shaken off can also be adsorbed by the electromagnet.

[0024] Further, the cleaning chamber is connected with an exhaust pipe, and the bottom of the cleaning chamber is provided with a detachable base.

[0025] The principle and effects of the scheme are that the base is detached to clean the particles collected in the cleaning chamber.

[0026] Further, the exhaust pipe is provided with a buckle groove, and the filter screen is provided with a buckle matched with the buckle groove.

[0027] The principle and effects of the scheme are that the buckle groove and the buckle are matched to realize sealing and anti-displacement fixing of the filter screen and the inner wall of the exhaust pipe.

[0028] Further, the gas storage chamber is connected with a back flushing pipe, the back flushing pipe is communicated with the exhaust pipe, and the connecting end of the back flushing pipe and the exhaust pipe is located at the rear end of the filter screen, and the back flushing pipe is provided with a gas release valve.

[0029] The principle and effects of the scheme are that the gas release valve is opened, the compressed gas stored in the gas storage chamber is sprayed into the exhaust pipe at the rear end of the filter screen through the back flushing pipe, and the impurities attached to the inner wall of the exhaust pipe are flushed to the outside discharge port. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Structure diagram of the portable gas chromatography analysis device with pipeline storage Figure 1 ;

[0031] Figure 2 Structure diagram of the portable gas chromatography analysis device with pipeline storage Figure 2 ;

[0032] Figure 3 Structure diagram of the portable gas chromatography analysis device with pipeline storage Figure 3 ;

[0033] Figure 4 Structure diagram of the portable gas chromatography analysis device with pipeline storage

[0034] Figure 5The internal structure diagram of the filter assembly of the utility model is shown in the figure. Figure 1 ;

[0035] Figure 6 The internal structure diagram of the filter assembly of the utility model is shown in the figure. Figure 2 ;

[0036] Figure 7 The internal structure diagram of the fan blade of the utility model is shown in the figure.

[0037] The names of the corresponding marks in the drawings are: chromatographic column 1, air pipe 2, clamping groove 21, buckling groove 22, winding assembly 3, winding disc 31, first winding disc 311, second winding disc 312, supporting disc 32, through groove 321, supporting plate 33, bevel gear 34, lead screw 35, bevel gear 36, sliding block 37, filter assembly 4, cleaning chamber 41, base 411, fan blade 42, knocking block 421, exhaust hole 422, cavity 423, cam 43, air pump 44, air feeding pipe 441, exhaust valve 442, electromagnet 45, permanent magnet 46, filter screen 47, protruding block 471, spring 48, exhaust pipe 49, back flushing pipe 410. DETAILED DESCRIPTION

[0038] The conception and the technical effects of the utility model will be described clearly and completely in combination with the embodiments, so as to fully understand the purpose, the features and the effects of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, but not all the embodiments. Based on the embodiments of the utility model, other embodiments obtained by the person skilled in the art without creative labor are all within the protection scope of the utility model:

[0039] Embodiment:

[0040] Please refer to Figures 1-3A portable gas chromatography analysis device with pipeline storage, comprising a sample gas detection assembly and a chromatographic column 1, and the chromatographic column 1 is communicated with the oxygen detection assembly through the air pipe 2. Among them, the sample gas detection assembly and the chromatographic column 1 are prior art, and the sample gas detection mechanism and the chromatographic column in CN106290664A can be referred to. It also includes a winding assembly 3, which includes a winding disc 31, a supporting disc 32, a supporting plate 33 and a driving unit, the winding disc 31 is rigidly connected by a steel fixing shaft penetrating the first winding disc 311 and the second winding disc 312, the supporting disc 32 is coaxially rotatably connected with the first winding disc 311 through a deep groove ball bearing, eight radially extending through grooves 321 are equiangularly arranged on the circumference of the disc surface, and a sliding groove is arranged on the side wall of the through groove 321 for providing guidance for the supporting plate 33. The side walls of the supporting plate 33 are provided with convex edges matched with the sliding grooves, the convex edges are slidably connected with the sliding grooves, and the surface of the plate body in contact with the air pipe 2 is processed into a circular arc surface. The driving unit realizes synchronous extension adjustment of the supporting plate 33 through bevel gears 34, and the specific structure is shown in Figure 2 and Figure 3 The back surface of the supporting disc 32 is coaxially fixed with a bevel gear 36, and the bevel gear 34 engaged with the bevel gear 36 is coaxially fixed with six M5 lead screws 35 through key connection. Each lead screw 35 is installed at the end of the corresponding through groove 321 through a ball bearing, and the bottom of the supporting plate 33 is welded with a sliding block 37, and the sliding block 37 forms a ball screw pair with the lead screw 35. When the bevel gear 36 is rotated manually or by a motor, the supporting disc 32 drives the lead screw 35 to revolve, and the meshing action of the bevel gear 34 drives the lead screw 35 to rotate, so that the eight supporting plates 33 move radially at a speed of 0.5mm / s synchronously, realizing stepless adjustment of the winding diameter in the range of 80-150mm, forming a variable-diameter winding space. When the pipeline is long, the driving unit pushes the supporting plate 33 to expand outward to increase the storage diameter, so as to avoid the accumulation and volume expansion of the redundant pipeline caused by the fixed winding radius; on the contrary, in the short pipeline or narrow space scene, the supporting plate 33 is retracted to compress the storage space.

[0041] Please refer to Figures 4-7Further comprising a filter assembly 4 integrated in the air pipe 2 at the rear end of the chromatographic column 1, the filter assembly 4 comprises a stainless steel filter screen 47 inserted into a clamping groove 21 provided in the air pipe 2, the air pipe 2 is provided with a buckle groove 22, the filter screen 47 is provided with a buckle 472 matched with the buckle groove 22, and the buckle groove 22 of the inner wall of the air pipe 2 forms a sealing connection. A cleaning chamber 41 is arranged below the filter screen 47, the cleaning chamber 41 is connected with an exhaust pipe 49, a detachable base 411 is arranged at the bottom of the cleaning chamber 41, which is used for collecting metal debris with a particle size greater than 5 μm. A fan blade 42 is rotatably arranged in the cleaning chamber 41, the fan blade 42 is coaxially fixedly provided with a knocking block 421, a protrusion 471 matched with the knocking block 421 is arranged on the filter screen 47, and the first driving module and the second driving module for driving the filter screen 47 to move into the cleaning chamber 41 are further included. The first driving module comprises a cam 43, an air pump 44 and a gas storage chamber (not shown), the cam 43 is coaxially fixedly connected with the winding disc 31, the air pump 44 is arranged on the supporting disc 32, the cam 43 and the air pump 44 are cooperatively arranged, the air outlet end of the air pump 44 is in communication with the gas storage chamber, the gas storage chamber is connected with a gas supply pipe 441, the gas supply pipe 441 is provided with an exhaust valve 442, the distal end of the gas supply pipe 441 is rotatably connected with the fan blade 42, the blade of the fan blade 42 is provided with a cavity 423, and the blade of the fan blade 42 is provided with an exhaust hole 422, the exhaust hole 422 is in communication with the cavity 423, the cavity 423 is in communication with the gas supply pipe 441, and the exhaust hole 422 is an inclined exhaust hole 422, that is, the gas passing through the exhaust hole 422 can drive the fan blade 42 to rotate, and the ejected gas is directed towards the filter screen 47. The second driving module comprises an electromagnet 45 and a permanent magnet 46, the electromagnet 45 is arranged on the cleaning chamber 41, the permanent magnet 46 is arranged on the filter screen 47, the electromagnet 45 is energized for attracting the permanent magnet 46, the filter screen 47 is connected with a spring 48, and the free end of the spring 48 is connected with the cleaning chamber 41. The gas storage chamber is connected with a back flushing pipe 410, the distal end of the back flushing pipe 410 is in communication with the air pipe 2, and the connection end of the back flushing pipe 410 with the air pipe 2 is located at the rear end of the filter screen 47, the back flushing pipe 410 is provided with a gas release valve (not shown), by opening the gas release valve, the compressed gas stored in the gas storage chamber is sprayed into the air pipe 2 at the rear end of the filter screen 47 through the back flushing pipe 410, and the impurities adhered to the inner wall of the air pipe are flushed to the outside discharge port in the opposite direction.

[0042] Specific workflow: when winding or releasing the trachea 2, the winding disc 31 rotates, driving the cam 43 to rotate synchronously, and through the periodic extrusion of the cam 43 to the air pump 44, the gas is compressed and delivered to the storage chamber for temporary storage. After the detection is completed, the filter screen 47 needs to be cleaned, the electromagnet 45 is electrified to generate a magnetic field that is attracted to the permanent magnet 46, and through the magnetic attraction, the filter screen 47 is moved to the cleaning chamber 41, then the exhaust valve 442 is opened, the high-pressure gas enters the fan blade 42 blade cavity 423 through the gas delivery pipe 441, and is directed sprayed through the inclined exhaust hole 422 (the inclination angle is about 15-20 degrees), pushing the fan blade 42 to rotate, and the high-speed airflow sprayed by it washes and vibrates the filter screen 47.

[0043] The above is only an embodiment of the present application, and the specific structure and characteristics of the scheme known in the art are not described in detail. It should be pointed out that for those skilled in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.

Claims

1. A portable gas chromatography analysis device with tubing storage, comprising a sample gas detection component and a chromatographic column (1), wherein the chromatographic column (1) is connected to the sample gas detection component via a gas tube (2), characterized in that, It also includes a winding assembly (3), which includes: The take-up reel (31) includes a first take-up reel (311) and a second take-up reel (312), which are coaxially fixedly connected by a fixed shaft. Support disk (32), the support disk (32) is rotatably connected to the first winding disk (311), and the support disk (32) has a plurality of through slots (321) circumferentially opened along the center of the support disk (32). Support plate (33), there are several support plates (33), and they are slidably disposed in the through groove (321); A drive unit is used to drive the support plate (33) to slide within the through groove (321).

2. The portable gas chromatography analysis device with pipeline storage according to claim 1, characterized in that: The drive unit includes a bevel gear (34) and a lead screw (35). The support plate (32) is rotatably connected to a bevel gear (36). The bevel gear (34) meshes with the bevel gear (36). The bevel gear (34) is fixedly connected to the lead screw (35) on the same axis. The two ends of the lead screw (35) are rotatably connected to the through groove (321) respectively. The support plate (33) is provided with a slider (37). The slider (37) is threadedly connected to the lead screw (35).

3. A portable gas chromatography analysis device with pipeline storage according to claim 2, characterized in that: The sidewall of the through groove (321) is provided with a sliding groove for guiding the support plate (33), and the sidewall of the support plate (33) is slidably connected to the sliding groove; the contact surface between the support plate (33) and the air pipe (2) is an arc surface.

4. A portable gas chromatography analyzer with pipeline storage according to claim 1, characterized in that: It also includes a filter assembly (4), which includes a filter screen (47) disposed inside the trachea (2) and located at the rear end of the chromatographic column (1).

5. A portable gas chromatography analyzer with pipeline storage according to claim 4, characterized in that: The filter assembly (4) also includes a cleaning unit, which includes a cleaning chamber (41) and a fan blade (42). The cleaning chamber (41) is located below the filter screen (47). The air pipe (2) has a slot (21) through which the filter screen (47) passes. The cleaning chamber (41) is connected to the slot (21). The fan blade (42) is rotatably located in the cleaning chamber (41). The fan blade (42) is provided with a striking block (421). The filter screen (47) is provided with a protrusion (471) that cooperates with the striking block (421). The filter assembly (47) also includes a first drive module for driving the fan blade (42) to rotate and a second drive module for driving the filter screen (47) to move into the cleaning chamber (41).

6. A portable gas chromatography analysis device with pipeline storage according to claim 5, characterized in that: The first drive module includes a cam (43), an air pump (44), and an air storage chamber. The cam (43) is coaxially fixedly connected to the winding reel (31). The air pump (44) is mounted on the support plate (32). The cam (43) and the air pump (44) are configured to cooperate. The air outlet of the air pump (44) is connected to the air storage chamber. The air storage chamber is connected to an air supply pipe (441). An exhaust valve (442) is provided on the air supply pipe (441). The end of the air supply pipe (441) is rotatably connected to the fan blade (42). The blade of the fan blade (42) has a cavity (423) and an exhaust hole (422) is provided on the blade of the fan blade (42). The exhaust hole (422) is connected to the cavity (423). The cavity (423) is connected to the air supply pipe (441). The exhaust hole (422) is an inclined exhaust hole (422).

7. A portable gas chromatography analysis device with pipeline storage according to claim 5, characterized in that: The second drive module includes an electromagnet (45) and a permanent magnet (46). The electromagnet (45) is located on the cleaning chamber (41), and the permanent magnet (46) is located on the filter screen (47). The electromagnet (45) is energized to attract the permanent magnet (46). The filter screen (47) is connected to a spring (48), and the free end of the spring (48) is connected to the cleaning chamber (41).

8. A portable gas chromatography analyzer with pipeline storage according to claim 7, characterized in that: The cleaning chamber (41) is connected to an exhaust pipe (49); the bottom of the cleaning chamber (41) is provided with a detachable base (411).

9. A portable gas chromatography analysis device with pipeline storage according to claim 5, characterized in that: The air pipe (2) has a groove (22), and the filter screen (47) has a buckle (472) that fits into the groove (22).

10. A portable gas chromatography analysis device with pipeline storage according to claim 6, characterized in that: The gas storage chamber is connected to a backflush pipe (410), the end of which is connected to the air pipe (2), and the connection end of the backflush pipe (410) and the air pipe (2) is located at the rear end of the filter screen (47). The backflush pipe (410) is equipped with a vent valve.

Images