Multi-stage filtering device for gas chromatograph

Abstract

The utility model relates to the field of gas purification, and discloses a multistage filtering device for a gas chromatograph, which comprises a bottom plate, a filtering round pipe and a filtering flat pipe are arranged above the bottom plate, the outer wall of the filtering round pipe is fixedly connected with a mounting plate, the bottom of the mounting plate is fixedly connected to the top of the bottom plate, and the bottom of the mounting plate is fixedly connected with the bottom of the bottom plate. The ends, close to each other, of the filtering round pipe and the filtering flat pipe are fixedly connected through an adapter, an auxiliary pipeline is inserted into the top of the filtering flat pipe, the bottom end of the auxiliary pipeline is detachably connected with a second filtering net plate, and a replacing mechanism and a convenient mechanism are arranged on the bottom plate. According to the utility model, another filter channel can be provided by arranging the auxiliary pipeline, the effect of filtering particulate matters of the main channel can be achieved by arranging the filter screen plate, the effect of blocking the interior of the auxiliary pipeline can be achieved by arranging the baffle plate, the sealing effect is achieved, and the situation that the main channel can still circulate from the auxiliary pipeline during use is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas purification field especially relates to a multistage filter device for gas chromatograph. BACKGROUND

[0002] Gas chromatograph refers to chromatographic analysis instrument using gas as mobile phase, and its principle is mainly to realize the separation of mixture by using the difference of boiling point, polarity and adsorption property of substances.

[0003] After the sample to be analyzed is gasified in the gasification chamber, it is taken into the chromatographic column by inert gas, i.e. carrier gas, the column contains liquid or solid stationary phase, and each component in the sample tends to form distribution or adsorption balance between the mobile phase and the stationary phase, with the flow of carrier gas, the sample components repeatedly distribute and desorb in the movement, and the components with high distribution concentration flow out of the chromatographic column first, while the components with high distribution concentration in the stationary phase flow out later, and after the components flow out of the chromatographic column, they enter the detector to be measured, and the quality of carrier gas directly affects the accuracy of chromatograph analysis data and the service life of the instrument.

[0004] However, with the filtration, the filter will gradually adsorb and trap impurities, resulting in a decrease in filtration efficiency, and even plugging, if the filter needs to be replaced, the entire filtration process needs to be stopped, and then the filter needs to be replaced, and after the replacement is completed, the entire filtration work needs to be restarted, which is time-consuming, and therefore a multistage filter device for gas chromatograph is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a multistage filter device for gas chromatograph, which aims to improve the problem that in the prior art, if the filter needs to be replaced, the entire filtration process needs to be stopped.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a multistage filter device for gas chromatograph, comprising a bottom plate, a filter round pipe and a filter flat pipe are arranged above the bottom plate, a mounting plate is fixedly connected to the outer wall of the filter round pipe, the bottom of the mounting plate is fixedly connected to the top of the bottom plate, the filter round pipe and the filter flat pipe are fixedly connected through an adapter at one end close to each other, the other end of the two filter round pipes is respectively provided with an inlet and an outlet, an auxiliary pipeline is inserted into the top of the filter flat pipe, a second filter screen plate is detachably connected to the bottom end of the auxiliary pipeline, the bottom of the second filter screen plate is inserted into the top of the filter flat pipe, a filter screen plate is detachably connected to one end of the filter flat pipe close to each other, a drying box is fixedly connected to one end of the filter round pipe close to each other, a through hole is formed in the side wall of the auxiliary pipeline above the filter flat pipe, a shielding plate is slidably connected to the inner wall of the through hole, and a replacement mechanism and a convenient mechanism are arranged on the bottom plate.

[0007] As a further description of the above technical solution: the replacement mechanism comprises a limiting rod, the outer wall of the limiting rod is fixedly connected to the outer wall of the left filter flat tube, a first spring is fixedly connected to the outer wall of the left filter flat tube, and the outer wall of the one end of the first spring away from the filter flat tube is fixedly connected to the outer wall of the shielding plate.

[0008] As a further description of the above technical solution: the limiting rod is T-shaped, the outer wall of the limiting rod penetrates through the outer wall of the shielding plate and is slidingly connected, and the outer wall of the shielding plate contacts the outer wall of the filter screen plate.

[0009] As a further description of the above technical solution: the convenient mechanism comprises a sliding groove, the sliding groove is formed in the top outer wall of the bottom plate, the bottom of the filter screen plate is slidingly connected in the inner wall of the sliding groove, the inner wall of the sliding groove is also slidingly connected with a sealing plate, the sealing gasket is fixedly connected to the outer wall of the side of the sealing plate close to the shielding plate, and the outer wall of the filter screen plate and the outer wall of the sealing plate are detachably connected through the limiting assembly.

[0010] As a further description of the above technical solution: the limiting assembly comprises two bolts and a limiting plate, and the two bolts are threadedly connected in the inner wall of the filter screen plate and the inner wall of the sealing plate through the limiting plate.

[0011] As a further description of the above technical solution: the inner wall of the sliding groove is slidingly connected with a baffle, the outer wall of the baffle is fixedly connected with a second spring, and the one end of the second spring away from the baffle is fixedly connected to the inner wall of the sliding groove.

[0012] As a further description of the above technical solution: the top outer wall of the bottom plate is fixedly connected with a cooling box, the bottom inner wall of the cooling box is fixedly connected with a water storage tank, the bottom inner wall of the cooling box is also fixedly connected with a water pump, the water inlet of the water pump is fixedly connected with a water inlet pipe, the one end of the water inlet pipe away from the water pump is fixedly connected in the inner wall of the water storage tank, and the water outlet of the water pump is fixedly connected with a water outlet pipe.

[0013] As a further description of the above technical solution: the outer wall of the water outlet pipe is arranged on the outer wall of the drying box and is fixedly connected in the inner wall of the water storage tank.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] 1、The utility model discloses a filter device, which comprises a bottom plate, a filter flat tube, a filter screen plate, a shielding plate and a convenient mechanism.

[0016] 2. The utility model discloses, through the mode of abutting, play lets the shielding board completely shields the passageway in the inside auxiliary pipeline, play the shielding effect, and the first spring is in the forced compression state at this time, can drive the shielding board to be active and then no longer shield the passageway in the inside auxiliary pipeline after losing the force of abutting.

[0017] 3. The utility model discloses, through the quicklime drier in the inside drying box, a large amount of heat can be released in the water absorption process, can carry out cooling treatment to whole drying box, through setting up the water outlet pipe, can pump out cooling liquid, make cooling liquid circulate, and the mode of around setting can carry out heat exchange treatment to drying box, take away heat. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front view of a kind of multistage filtering device for gas chromatograph proposed in the utility model;

[0019] Figure 2 It is the structural schematic view of a kind of multistage filtering device for gas chromatograph proposed in the utility model;

[0020] Figure 3 It is the plan view of a kind of multistage filtering device for gas chromatograph proposed in the utility model;

[0021] Figure 4 It is a kind of multistage filtering device for gas chromatograph proposed in the utility model Figure 2 The enlarged view of A;

[0022] Figure 5 It is a kind of multistage filtering device for gas chromatograph proposed in the utility model Figure 3 The enlarged view of B;

[0023] Figure 6 It is a kind of multistage filtering device for gas chromatograph proposed in the utility model Figure 3 The enlarged view of C.

[0024] Legend:

[0025] 1, bottom plate;2, filter round pipe;3, mounting plate;4, adapter;5, filter flat pipe;6, auxiliary pipeline;7, drying box;8, filter screen plate;9, shielding plate;10, limit rod;11, first spring;12, sealing plate;13, baffle;14, second spring;15, cooling box;16, water storage tank;17, water pump;18, water outlet pipe;19, limit assembly;20, second filter screen plate;21, chute;22, water inlet pipe. DETAILED DESCRIPTION

[0026] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application. Figure 1 Figure 3 The present application provides an embodiment: a multi-stage filtering device for a gas chromatograph, comprising a bottom plate 1, a filtering round pipe 2 and a filtering flat pipe 5 are arranged above the bottom plate 1, three filtering round pipes 2 and filtering flat pipes 5 are arranged to facilitate connection, the outer wall of the three filtering round pipes 2 is fixedly connected with a mounting plate 3, the mounting plate 3 is arranged to enable the filtering round pipe 2 to be installed and limited, the bottom of the two mounting plates 3 is fixedly connected to the top of the bottom plate 1, one end of the filtering round pipe 2 and the filtering flat pipe 5 close to each other is fixedly connected through an adapter 4, the adapter 4 is arranged to enable the round pipe and the flat pipe to be seamlessly connected, the other end of the two filtering round pipes 2 is respectively arranged as an inlet and an outlet, the arrangement enables the material to be conveniently fed and discharged, the top of the two filtering flat pipes 5 is inserted with an auxiliary pipeline 6, the auxiliary pipeline 6 is arranged to provide another filtering channel, the bottom end of the auxiliary pipeline 6 on the right side is detachably connected with a second filtering screen plate 20, the second filtering screen plate 20 is arranged to enable the auxiliary pipeline 6 to filter particulate matter, the bottom of the second filtering screen plate 20 is inserted with the top of the filtering flat pipe 5 on the right side, the arrangement enables the second filtering screen plate 20 to be conveniently detached from the auxiliary pipeline 6 and the auxiliary pipeline 6 to be conveniently removed as a whole from the filtering flat pipe 5, one end of the two filtering flat pipes 5 close to each other is detachably connected with a filtering screen plate 8, the filtering screen plate 8 is arranged to enable the main channel to filter particulate matter, one end of the two filtering round pipes 2 on the right side close to each other is fixedly connected with a drying box 7, the drying box 7 is arranged to enable the filtering round pipes 2 to filter moisture, the side wall of the auxiliary pipeline 6 above the filtering flat pipe 5 on the left side is provided with a through hole, the through hole is arranged to provide a position for the auxiliary pipeline 6 to be inserted and to be communicated, a shielding plate 9 is slidably connected to the inner wall of the through hole, the shielding plate 9 is arranged to enable the inside of the auxiliary pipeline 6 to be shielded, to achieve a sealing effect, and to avoid the main channel from being communicated with the auxiliary pipeline 6 during use, the bottom plate 1 is provided with a replacement mechanism and a convenient mechanism.

[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application. Figure 3 Figure 5 ​​The replacement mechanism comprises a limiting rod 10, an outer wall of the limiting rod 10 is fixedly connected to an outer wall of the left filter flat tube 5, the limiting rod 10 is arranged to limit the sliding of the shielding plate 9, a first spring 11 is fixedly connected to the outer wall of the left filter flat tube 5, an outer wall of one end of the first spring 11 away from the filter flat tube 5 is fixedly connected to an outer wall of the shielding plate 9, the first spring 11 is arranged to drive the shielding plate 9 to displace under the release of stored energy, the limiting rod 10 is in the shape of T, the limiting rod 10 is arranged to limit the shielding plate 9 and prevent the shielding plate 9 from falling off, the outer wall of the limiting rod 10 penetrates through the outer wall of the shielding plate 9 and is slidably connected to the outer wall of the shielding plate 9, and the outer wall of the shielding plate 9 is in contact with an outer wall of the filter screen plate 8, the shielding plate 9 is arranged to completely shield the channel in the auxiliary pipeline 6 by abutting, the shielding plate 9 is arranged to shield the channel in the auxiliary pipeline 6, and the first spring 11 is in a force compression state at this time, and the shielding plate 9 is arranged to move and stop shielding the channel in the auxiliary pipeline 6 after the abutting force is lost.

[0029] With reference to Figure 4 - Figure 5 The convenient mechanism comprises a sliding groove 21, the sliding groove 21 is arranged in the top surface outer wall of the bottom plate 1, the bottom of the filter screen plate 8 is slidably connected to the inner wall of the sliding groove 21, the sliding groove 21 is arranged to limit the filter screen plate 8 when the filter screen plate 8 slides, the inner wall of the sliding groove 21 further slidably connects a sealing plate 12, the sealing plate 12 is arranged to be lower than the filter screen plate 8 to ensure that the sealing plate 12 cannot abut against the shielding plate 9 after displacement, a sealing gasket is fixedly connected to the outer wall of one side of the sealing plate 12 close to the shielding plate 9, the sealing gasket is arranged to seal the main channel of the filter flat tube 5, the outer wall of the filter screen plate 8 and the outer wall of the sealing plate 12 are detachably connected by a limiting assembly 19, the limiting assembly 19 is arranged to facilitate the installation or disassembly of the sealing plate 12 and the filter screen plate 8, the limiting assembly 19 comprises two bolts and a limiting plate, the two bolts are respectively threadedly connected to the inner wall of the filter screen plate 8 and the inner wall of the sealing plate 12 by the limiting plate, the two bolts are arranged to be screwed and connected to the sealing plate 12 and the filter screen plate 8 by the limiting plate, the sealing plate 12 and the filter screen plate 8 are tightly connected, and the two bolts are arranged to be removed to disconnect the sealing plate 12 and the filter screen plate 8, the inner wall of the sliding groove 21 slidably connects a baffle 13, the baffle 13 is arranged to limit the filter screen plate 8, a second spring 14 is fixedly connected to the outer wall of the baffle 13, one end of the second spring 14 away from the baffle 13 is fixedly connected to the inner wall of the sliding groove 21, and the second spring 14 is arranged to control the displacement of the baffle 13.

[0030] With reference to Figure 1 and Figure 6The top outer wall of the bottom plate 1 is fixedly connected with a cooling box 15. By arranging the cooling box 15, since the hydrated lime desiccant in the drying box 7 will have a violent chemical reaction after absorbing water, which is an exothermic reaction, a large amount of heat will be released in the water absorption process, and the entire drying box 7 can be cooled. The bottom inner wall of the cooling box 15 is fixedly connected with a water storage tank 16. By arranging the water storage tank 16, the effect of storing the cooling liquid can be achieved. The bottom inner wall of the cooling box 15 is also fixedly connected with a water pump 17. By arranging the water pump 17, the cooling liquid can be pumped out. The water inlet of the water pump 17 is fixedly connected with a water inlet pipe 22. By arranging the water inlet pipe 22, the cooling liquid in the water storage tank 16 can be extracted. The end of the water inlet pipe 22 away from the water pump 17 is fixedly connected to the inner wall of the water storage tank 16. The water outlet of the water pump 17 is fixedly connected with a water outlet pipe 18. By arranging the water outlet pipe 18, the cooling liquid can be pumped out to circulate. The outer wall of the water outlet pipe 18 is arranged on the outer wall of the drying box 7 and is fixedly connected to the inner wall of the water storage tank 16. By arranging the winding manner, the drying box 7 can be heat exchanged to remove heat. The top of the water storage tank 16 is provided with a top cover, which is convenient to open and close, and facilitates replacement of the cooling liquid.

[0031] Working principle: through the sample to be filtered raw material is connected through the feeding container and the inlet of the filter pipe 2, and the gas chromatograph receiving the filtered sample is connected with the outlet of the filter pipe 2, then the filtering operation is carried out, the whole flow passes through the first filter pipe 2, then is transmitted to the first filter flat pipe 5 through the first adapter 4, then is transmitted to the second filter flat pipe 5 through the filter screen plate 8, then is transmitted to the second filter pipe 2 through the second adapter 4, and finally is transmitted to the gas chromatograph through the drying box 7. In the whole filtering process, the particulate impurities may block the filter screen plate 8, affecting the normal separation of the sample. Then the baffle 13 blocking the filter screen plate 8 can be manually pulled to displace, providing space for the filter screen plate 8 to move to the side. Then the filter screen plate 8 is pulled and the sealing plate 12 is moved until the sealing plate 12 seals the two filter flat pipes 5, and the other baffle 13 is not blocked by the sealing plate 12 and is displaced to the side of the sealing plate 12 under the energy storage release of the second spring 14, serving as a one-way limit. Then the filter screen plate 8 is removed by removing the bolt, and then the other baffle 13 is not blocked and is displaced to the other side of the sealing plate 12 under the energy storage release of the second spring 14, limiting the position of the whole sealing plate 12. At the same time, after the filter screen plate 8 is removed, the blocking plate 9 is no longer subjected to the force of abutment and is displaced under the release of the energy storage of the first spring 11, thereby opening the auxiliary pipeline 6 for use. Whether the main channel or the auxiliary pipeline 6 is used, it will pass through the drying box 7 to remove water by absorbing water with calcium oxide desiccant, and during this period, the water storage tank 16 can be heat exchanged by pumping the coolant with the water pump 17.

[0032] Finally, it should be pointed out that: the above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the scope of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-stage filtration device for a gas chromatograph, comprising a base plate (1), characterized in that: A filter round tube (2) and a filter flat tube (5) are arranged above the base plate (1). An installation plate (3) is fixedly connected to the outer wall of the filter round tube (2). The bottom of the installation plate (3) is fixedly connected to the top of the base plate (1). The ends of the filter round tube (2) and the filter flat tube (5) that are close to each other are fixedly connected by an adapter (4). An auxiliary pipe (6) is inserted into the top of the filter flat tube (5). A second filter screen is detachably connected to the bottom end of the auxiliary pipe (6). (20) The bottom of the second filter screen (20) is inserted into the top of the filter flat tube (5). The filter flat tube (5) is detachably connected to a filter screen (8) at one end. The filter round tube (2) is fixedly connected to a drying box (7) at one end. An opening is provided on the side wall of the auxiliary pipe (6) above the filter flat tube (5). A baffle plate (9) is slidably connected to the inner wall of the opening. A replacement mechanism and a convenient mechanism are provided on the bottom plate (1).

2. The multi-stage filtration device for a gas chromatograph according to claim 1, characterized in that: The replacement mechanism includes a limiting rod (10), the outer wall of which is fixedly connected to the outer wall of the filter flat tube (5) located on the left side. A first spring (11) is fixedly connected to the outer wall of the filter flat tube (5) located on the left side. The outer wall of the first spring (11) away from the filter flat tube (5) is fixedly connected to the outer wall of the baffle plate (9).

3. A multi-stage filtration device for a gas chromatograph according to claim 2, characterized in that: The limiting rod (10) is T-shaped. The outer wall of the limiting rod (10) penetrates the inner wall of the baffle plate (9) and is slidably connected. The outer wall of the baffle plate (9) contacts the outer wall of the filter screen plate (8).

4. A multi-stage filtration device for a gas chromatograph according to claim 1, characterized in that: The convenient mechanism includes a slide (21) which is formed on the outer wall of the top surface of the base plate (1). The bottom of the filter screen plate (8) is slidably connected to the inner wall of the slide (21). A sealing plate (12) is also slidably connected to the inner wall of the slide (21). A sealing gasket is fixedly connected to the outer wall of the sealing plate (12) on the side near the shield plate (9). The outer wall of the filter screen plate (8) and the outer wall of the sealing plate (12) are detachably connected by a limiting component (19).

5. A multi-stage filtration device for a gas chromatograph according to claim 4, characterized in that: The limiting component (19) includes two bolts, which are respectively threaded into the inner wall of the filter screen plate (8) and the inner wall of the sealing plate (12) via the limiting plate.

6. A multi-stage filtration device for a gas chromatograph according to claim 4, characterized in that: A baffle (13) is slidably connected to the inner wall of the slide groove (21), and a second spring (14) is fixedly connected to the outer wall of the baffle (13). The end of the second spring (14) away from the baffle (13) is fixedly connected to the inner wall of the slide groove (21).

7. A multi-stage filtration device for a gas chromatograph according to claim 1, characterized in that: A cooling tank (15) is fixedly connected to the top outer wall of the base plate (1), a water storage tank (16) is fixedly connected to the bottom inner wall of the cooling tank (15), a water pump (17) is also fixedly connected to the bottom inner wall of the cooling tank (15), an inlet pipe (22) is fixedly connected to the inlet of the water pump (17), the end of the inlet pipe (22) away from the water pump (17) is fixedly connected to the inner wall of the water storage tank (16), and an outlet pipe (18) is fixedly connected to the outlet of the water pump (17).

8. A multi-stage filtration device for a gas chromatograph according to claim 7, characterized in that: The outer wall of the water outlet pipe (18) is wrapped around the outer wall of the drying box (7) and fixedly connected to the inner wall of the water storage tank (16).

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