Chromatographic column box structure of online gas chromatograph

Abstract

The utility model relates to the technical field of gas chromatographs, in particular to a chromatographic column box structure of an on-line gas chromatograph, which comprises a box body, the box body is divided into a main body and a cover plate, thermal insulation layers are arranged in the main body and the cover plate, a pore plate is fixed on the inner side of the main body, a chromatographic column is mounted on one side, close to the cover plate, of the pore plate, and the chromatographic column is arranged on the other side of the pore plate. And a heating element and a temperature sensor are arranged on one side opposite to the chromatographic column. According to the chromatographic column box structure of the on-line gas chromatograph, the interior of the box body is heated through heating of the heating element, the motor is started, the motor is powered on to drive the fan blades to rotate at a high speed, the heating element is rapidly cooled, the temperature in the box body is rapidly increased, the temperature in the box body is uniform, and the temperature sensor directly measures the air temperature in the box body; the hot air flowing at a high speed heats the chromatographic column, so that the chromatographic column is rapidly and uniformly heated, the temperature stabilization time is short and is basically not influenced by the environment temperature, and the stabilization time of the test data of the online chromatographic instrument is greatly shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of gas chromatographs, in particular to a chromatographic column box structure of an online gas chromatograph. Background Art

[0002] Currently, the column chamber of an online chromatograph often uses a heating rod as the heating source. This rod is placed in a cylindrical heat sink, and the column surrounds the block, receiving heat from the block for heating. This heating method has the advantages of a compact column chamber and low cost. However, its disadvantages include uneven internal temperature and a long stabilization time, which manifests itself in a long stabilization time for online chromatograph test data. Furthermore, this heating method is easily affected by ambient temperature, making it unsuitable for customers with high instrument performance requirements. Utility Model Content

[0003] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a chromatographic column box structure of an online gas chromatograph, comprising a box body, the box body being divided into a main body and a cover plate, the interior of the main body and the cover plate being provided with an insulation layer, a perforated plate being fixed on the inner side of the main body, a chromatographic column being installed on the side of the perforated plate close to the cover plate, and a heating element and a temperature sensor being installed on the side opposite to the chromatographic column, a side wall of the main body opposite to the heating element being rotatably connected to a fan blade, and a motor connected to the fan blade being installed on the outer side, and an outlet hole and an outlet slot being provided at the bottom of the main body.

[0004] Furthermore, the main body includes an outer shell, an inner shell, an outer bottom plate and an inner bottom plate. The outer shell and the inner shell, and the outer bottom plate and the outer shell are riveted together with eight rivets. The insulation layer is located between the outer shell and the inner shell.

[0005] Furthermore, the insulation layer is also located in the cover plate, and the four sides of the cover plate are formed with edge flanges that wrap the insulation layer. A plurality of threaded holes are opened on the outer shell, and the cover plate is threadedly connected to the insulation layer through screws and extends to the threaded holes.

[0006] Furthermore, the cover plate is provided with four self-clinching studs penetrating the thermal insulation layer, the outer sides of the self-clinching studs are sleeved with gaskets, and the internal threads of the self-clinching studs are connected to screws penetrating the cover plate and the thermal insulation layer.

[0007] Furthermore, the thermal insulation layer may be aluminum silicate fiber paper or aluminum silicate fiber cotton.

[0008] Furthermore, two side plates are fixed on both side walls of the inner shell, a second threaded hole is opened on the side plate, a fixing hole is opened on the hole plate, and a screw is threadedly connected in the second threaded hole and passed through the fixing hole.

[0009] Furthermore, the heating element can be selected from one of a circular spiral heating wire, a circular carbon fiber heating tube, a circular warped fin heating tube or a circular stainless steel electric heating tube.

[0010] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0011] The chromatographic column box structure of the online gas chromatograph heats the inside of the box through heating elements. When the motor is started, the motor is energized to drive the fan blades to rotate at high speed to quickly dissipate heat from the heating element and quickly increase the temperature inside the box, making the temperature inside the box uniform. The temperature sensor directly measures the air temperature inside the box. The high-speed flowing hot air heats the chromatographic column, causing it to heat up quickly and evenly. The temperature stabilization time is short and is basically unaffected by the ambient temperature, greatly shortening the stabilization time of the online chromatograph test data. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a three-dimensional diagram of the present invention without the cover plate;

[0014] Figure 3 It is a sectional three-dimensional diagram of the present utility model;

[0015] Figure 4 It is a three-dimensional diagram of the cover plate in the present utility model.

[0016] In the figure: 1. Outer shell; 2. Inner shell; 21. Threaded hole 2; 22. Side plate; 3. Orifice plate; 31. Fixing hole; 4. Chromatographic column; 5. Outer bottom plate; 6. Inner bottom plate; 7. Motor; 8. Fan blade; 9. Cover plate; 91. Edge flange; 92. Riveted stud; 93. Gasket; 101. Rivet; 102. Temperature sensor; 103. Heating element; 104. Aluminum silicate fiber cotton; 11. Threaded hole 1; 12. Lead-out hole; 13. Lead-out notch. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] See also Figure 1-4 ,by Figure 2In the direction shown, a chromatographic column box structure of an online gas chromatograph in this embodiment includes a box body, which is divided into a main body and a cover plate 9 connected to the main body. The interior of the main body and the cover plate 9 are both provided with an insulation layer, and the insulation layer can be aluminum silicate fiber paper or aluminum silicate fiber cotton 104. A hole plate 3 is fixed at the center of the inner side of the main body, and the hole plate 3 divides the main body into two intervals. A chromatographic column 4 is fixed on the side opposite to the hole plate 3 and the cover plate 9. The chromatographic column 4 is a capillary chromatographic column with a column holder. The hole plate 3 is fixed on the side opposite to the chromatographic column 4. A heating element 103 and a temperature sensor 102 are installed. The heating element 103 can be selected from one of a circular spiral heating wire, a circular carbon fiber heating tube, a circular warped-plate heating tube or a circular stainless steel electric heating tube. The bottom of the main body is provided with a lead-out hole 12 and a lead-out slot 13 for guiding the heating element 103, the temperature sensor 102 and the chromatographic column 4 line respectively. A fan blade 8 is rotatably installed on the side wall of the main body opposite to the heating element 103, and a motor 7 is installed on the outer side of the main body to pass through the insulation layer and drive the fan blade 8 to rotate.

[0019] In the above structure, the thermal insulation effect is improved by the thermal insulation layer, which can prevent the influence of the external ambient temperature. The heating element can achieve heating in a short time, and the fan blades are driven by the motor to rotate, so that the heat on the heating element can be blown away, so that the heat is evenly distributed in the box to complete the uniform heating and uniform temperature increase of the chromatographic column, and the temperature sensor measures the temperature inside the box.

[0020] The main body comprises an outer shell 1 and an inner shell 2 riveted to the outer shell 1 via eight rivets 101. Multiple circular holes are provided on the same side of the outer shell 1 and the inner shell 2. The outer bottom plate 5 and the inner bottom plate 6 are secured to the back of the outer shell 1 via rivets 101. The aluminum silicate fiber cotton 104 is located between the outer shell 1 and the inner shell 2, as well as between the outer bottom plate 5 and the inner bottom plate 6. The rivets secure the outer shell, inner shell, outer bottom plate, and inner bottom plate together to form the main body of the box, making it easy to disassemble and store the box by removing the rivets.

[0021] In addition, the four sides of the cover body 9 are formed with edge flanges 91. Aluminum silicate fiber wool 104 is disposed within the cover body 9 between the four edge flanges 91. Threaded holes 11 are formed on all four sides of the left side of the housing 1. The cover plate 9 is threadedly connected to the aluminum silicate fiber wool 104 via screws that penetrate and extend into the threaded holes 11. The edge flanges and the cover body cooperate to encase the aluminum silicate fiber wool, providing protection while also reducing its exposure. The cover plate and the aluminum silicate fiber wool are then secured together with screws.

[0022] Furthermore, the cover plate 9 is provided with four self-clinching studs 92 that penetrate the aluminum silicate fiber cotton 104. Gaskets 93 that can abut against the aluminum silicate fiber cotton 104 are sleeved on the outer sides of the self-clinching studs 92. Screws that penetrate the cover plate 9 and the aluminum silicate fiber cotton 104 are threadedly connected in the screw holes of the self-clinching studs 92. The screws are threadedly connected to the self-clinching studs, which can make the connection between the aluminum silicate fiber cotton and the cover plate more secure and prevent the aluminum silicate fiber cotton from falling off when the cover plate is opened.

[0023] At the same time, two side panels 22 are fixed to the upper and lower side walls of the inner shell 2. The side panels 22 are L-shaped and have threaded holes 21 therein. The orifice plate 3 has fixing holes 31 therein. When the orifice plate 3 is attached to the side panels 22, the threaded holes 21 and the fixing holes 31 are opposite each other. The threaded holes 21 are threadedly connected to the screws passing through the fixing holes 31. The side panels can support and limit the orifice plate, allowing the orifice plate to be accurately placed in the designated position. At the same time, fixing with screws also facilitates later disassembly, maintenance, or replacement.

[0024] The working principle of the above embodiment is:

[0025] First, the side plate installs the orifice plate to the designated position of the inner shell, and then seals the cover plate. When the heating element and motor are running, the motor drives the fan blades to rotate at high speed, which can blow the heat emitted by the heating element into the box, quickly dissipate the heat and make the temperature inside the box rise rapidly. The aluminum silicate fiber cotton has a heat preservation effect, making the temperature inside the box uniform. The temperature sensor directly measures the air temperature in the box. The high-speed flowing hot air heats the chromatographic column, making it heat up quickly and evenly. The temperature stabilization time is short and is basically not affected by the ambient temperature, which greatly shortens the stabilization time of the online chromatograph test data.

[0026] The entire workflow is complete, and all contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0027] 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 "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0028] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chromatographic column box structure of an online gas chromatograph, characterized in that: The invention comprises a box body, wherein the box body is divided into a main body and a cover plate (9), wherein the interior of the main body and the cover plate (9) are both provided with a heat-insulating layer, a perforated plate (3) is fixed on the inner side of the main body, a chromatographic column (4) is installed on the side of the perforated plate (3) close to the cover plate (9), and a heating element (103) and a temperature sensor (102) are installed on the side opposite to the chromatographic column (4), a fan blade (8) is rotatably connected to a side wall of the main body opposite to the heating element (103), and a motor (7) connected to the fan blade (8) is installed on the outer side, and an outlet hole (12) and an outlet notch (13) are provided at the bottom of the main body.

2. The chromatographic column box structure of an online gas chromatograph according to claim 1, characterized in that: The main body comprises an outer shell (1), an inner shell (2), an outer bottom plate (5) and an inner bottom plate (6); the outer shell (1) and the inner shell (2), and the outer bottom plate (5) and the outer shell (1) are riveted together using eight rivets (101); and the thermal insulation layer is located between the outer shell (1) and the inner shell (2).

3. The chromatographic column box structure of an online gas chromatograph according to claim 2, characterized in that: The thermal insulation layer is also located in the cover plate (9), and the four sides of the cover plate (9) are formed with edge flanges (91) that wrap the thermal insulation layer. The shell (1) is provided with a plurality of threaded holes (11), and the cover plate (9) is threadedly connected to the thermal insulation layer by screws and extends to the threaded holes (11).

4. The chromatographic column box structure of an online gas chromatograph according to claim 3, characterized in that: The cover plate (9) is further provided with four pressure riveted studs (92) penetrating the thermal insulation layer. The outer sides of the pressure riveted studs (92) are sleeved with gaskets (93). The internal threads of the pressure riveted studs (92) are connected with screws penetrating the cover plate (9) and the thermal insulation layer.

5. The chromatographic column box structure of an online gas chromatograph according to claim 4, characterized in that: The thermal insulation layer may be aluminum silicate fiber paper or aluminum silicate fiber cotton (104).

6. The chromatographic column box structure of an online gas chromatograph according to claim 2, characterized in that: Two side plates (22) are fixed on both side walls of the inner shell (2), and a second threaded hole (21) is provided on the side plate (22). A fixing hole (31) is provided on the orifice plate (3), and a screw threadedly connected to the second threaded hole (21) and passing through the fixing hole (31) is provided.

7. The chromatographic column box structure of an online gas chromatograph according to claim 1, characterized in that: The heating element (103) can be selected from one of a circular spiral heating wire, a circular carbon fiber heating tube, a circular warped fin heating tube or a circular stainless steel electric heating tube.

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