Constant-temperature thermal conductivity cell detection device of oxygen-nitrogen-hydrogen analyzer

Abstract

The utility model discloses a constant-temperature thermal conductivity cell detection device of an oxygen-nitrogen-hydrogen analyzer, which comprises a heat preservation box, a cross rod is arranged on the outer wall of the heat preservation box, a plurality of uniformly distributed chutes are arranged on the cross rod, a pair of clamping plates is connected in the chutes in a sliding manner, the cross section of each clamping plate is arc-shaped, positioning columns are fixed in the chutes, and the positioning columns penetrate through positioning holes on the clamping plates. The positioning column is sleeved with a pair of springs, and the two ends of each spring are fixed to the side wall of the sliding groove and the clamping plate respectively. According to the hose clamping device, the two clamping plates located in the same group are pushed away towards the two sides along the sliding grooves respectively, then the hose connected to the hose clamping device is placed between the corresponding group of clamping plates, reverse elastic force of the springs acts on the clamping plates, the hose can be clamped, and therefore the multiple hoses are separated from one another and cannot be wound together.

Description

Technical Field

[0001] The utility model relates to the technical field of analysis and testing instruments, in particular to a constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer. Background Art

[0002] When a gas chromatograph uses a thermal conductivity cell detector for analysis, the performance of the thermal conductivity cell detector directly affects the stability and accuracy of the gas chromatograph's analysis.

[0003] In order to solve the many defects of the existing thermal conductivity cell detector, the Chinese patent with the announcement number CN105891394B discloses a thermal conductivity cell detector. The thermal conductivity cell body adopts a stainless steel cylindrical structure, with two vertical parallel holes with threads on the upper ends for installing gold-plated micro-spiral thermistors. The two gold-plated micro-spiral thermistors are sealed in the parallel holes by compression bolts, and each parallel hole is connected to two small transverse holes on the upper and lower sides; there is a tail gas hole in the middle of each of the two connectors that is connected to the chromatographic column hole, and each tail gas hole is welded with a tail gas stainless steel pipe for tail gas; the above components are installed in a stainless steel insulation box, and the insulation box is surrounded by insulation silicon wool boards, and the internal space surrounded by the silicon wool boards is filled with micro glass beads. Although the existing technical problems have been solved, the following problems still exist:

[0004] The thermal conductivity cell detector has multiple connecting pipes, which need to be connected to other devices through hoses when in use. The hoses are very messy and entangled with each other. It is difficult to distinguish where a hose is specifically connected during maintenance, which causes inconvenience to maintenance. Therefore, corresponding improvements are made to address this problem. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer comprises an insulation box, wherein the outer wall of the insulation box is provided with a cross bar, a plurality of evenly distributed slide grooves are provided on the cross bar, a pair of clamping plates are slidably connected in the slide grooves, the cross section of the clamping plates is arc-shaped, a positioning column is fixed in the slide groove, the positioning column passes through a positioning hole on the clamping plate, a pair of springs are sleeved on the positioning column, and the two ends of the springs are respectively fixed on the side wall of the slide groove and the clamping plate.

[0008] Preferably, the end of the clamping plate is provided with an introduction portion integrally formed therewith, the cross section of the introduction portion is arc-shaped, and the two introduction portions together form an eight-shaped shape.

[0009] Preferably, a pair of guide plates are fixed on the outer wall of the insulation box, and the guide plates are slidably connected with a pair of guide blocks on the cross bar. After the cross bar is moved to a suitable position along the guide plates, the position of the cross bar is fixed by a fixing assembly.

[0010] Preferably, the fixing assembly comprises a first ear block fixed on the heat preservation box, an adjusting screw is rotatably connected to the first ear block, and the adjusting screw is threadedly connected to a threaded hole on the cross bar.

[0011] Preferably, the fixing assembly comprises a second ear block on the guide block, a knob is threadedly connected to the second ear block, and a pressure plate capable of pressing against the guide plate is rotatably connected to the bottom end of the knob.

[0012] Preferably, a plurality of display boards corresponding to the slide grooves are fixed on the top of the cross bar, and grooves are formed on the display boards.

[0013] The beneficial effects of the utility model are:

[0014] 1. The device is provided with multiple groups of clamping plates. Two clamping plates in the same group are pushed to both sides along the slide groove respectively, and then the hose connected to the device is placed between the corresponding group of clamping plates. The reverse elastic force of the spring acts on the clamping plate to clamp the hose, so that multiple hoses are separated from each other and will not be entangled together.

[0015] 2. The device is provided with an introduction part. The hose is placed between the two introduction parts, and then the hose is pushed in with force. The hose can push the two clamps to both sides through the introduction part, and then directly enter between the two clamps and be clamped, so there is no need to deliberately pull the two clamps to both sides by hand.

[0016] 3. The device is provided with a first fixing component. The adjusting screw is rotated to move the cross bar upward or downward. When the cross bar is rotated to a suitable position, the adjusting screw is stopped and the cross bar can be fixed at that position.

[0017] 4. The device is provided with a second fixing component. After the cross bar is moved to a suitable position along the guide plate, the knob is turned, and the knob pushes the pressure plate tightly against the guide plate to fix the position of the cross bar.

[0018] 5. The device is provided with a display board, on which the connection part of the corresponding hose can be written on a label paper, and then the label paper is pasted in the groove on the display board above the corresponding hose, so that the staff can accurately distinguish each hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer proposed by the utility model;

[0020] Figure 2 This is a structural schematic diagram of a first type of fixing assembly of a constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer proposed by the utility model;

[0021] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer proposed;

[0022] Figure 4 This is a structural schematic diagram of a second type of fixing component of a constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer proposed by the utility model;

[0023] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure at point B of a proposed constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer.

[0024] In the figure: 1. insulation box; 2. cross bar; 3. slide groove; 4. clamping plate; 5. positioning column; 6. spring; 7. positioning hole; 8. introduction part; 9. guide plate; 10. guide block; 11. threaded hole; 12. first ear block; 13. adjusting screw; 14. display board; 15. groove; 16. second ear block; 17. knob; 18. pressure plate. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Reference Figure 1-5 A constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer comprises an insulation box 1, the outer wall of the insulation box 1 is provided with a cross bar 2, a plurality of evenly distributed slide grooves 3 are opened on the cross bar 2, a pair of clamping plates 4 are slidably connected in the slide groove 3, the cross section of the clamping plate 4 is arc-shaped, a positioning column 5 is fixed in the slide groove 3, the positioning column 5 passes through a positioning hole 7 on the clamping plate 4, a pair of springs 6 are sleeved on the positioning column 5, the two ends of the spring 6 are respectively fixed on the side wall of the slide groove 3 and the clamping plate 4, the two clamping plates 4 in the same group are pushed open to both sides along the slide groove 3, and then the hose connected to the device is placed between the corresponding group of clamping plates 4, and the reverse elastic force of the spring 6 acts on the clamping plate 4, so that the hose can be clamped, so that multiple hoses are spaced apart from each other and will not be entangled together.

[0027] Furthermore, the end of the splint 4 is provided with an introduction portion 8 integrally formed therewith, the cross-section of the introduction portion 8 is arc-shaped, and the two introduction portions 8 together form an eight-shaped shape. The hose is placed between the two introduction portions 8 and then pushed in with force. The hose can push the two splints 4 to both sides through the introduction portion 8, and then directly enter between the two splints 4 and be clamped, so there is no need to deliberately pull the two splints 4 to both sides by hand.

[0028] Furthermore, a pair of guide plates 9 are fixed on the outer wall of the insulation box 1, and the guide plates 9 form a sliding connection with a pair of guide blocks 10 on the cross bar 2. After the cross bar 2 is moved to a suitable position along the guide plates 9, the position of the cross bar 2 is fixed by a fixing assembly, so that multiple groups of clamps 4 can be moved to the position where multiple hoses are most densely packed, where the hoses are clamped and spaced apart by the clamps 4, thereby improving the separation effect of the hoses.

[0029] Furthermore, the fixing assembly includes a first ear block 12 fixed on the insulation box 1, and an adjusting screw 13 is rotatably connected to the first ear block 12. The adjusting screw 13 forms a threaded connection with the threaded hole 11 on the cross bar 2. The adjusting screw 13 is rotated to move the cross bar 2 upward or downward. When the cross bar 2 is rotated to a suitable position, the adjusting screw 13 is stopped and the cross bar 2 can be fixed at this position.

[0030] Furthermore, the fixing assembly includes a second ear block 16 on the guide block 10, and a knob 17 is threadedly connected to the second ear block 16. The bottom end of the knob 17 is rotatably connected to a pressure plate 18 that can press against the guide plate 9. After the cross bar 2 is moved to a suitable position along the guide plate 9, the knob 17 is rotated, and the knob 17 pushes the pressure plate 18 to press against the guide plate 9, so that the position of the cross bar 2 can be fixed.

[0031] Furthermore, a plurality of display boards 14 corresponding to the slide slots 3 are fixed on the top of the cross bar 2, and a groove 15 is provided on the display board 14. The connection position of the corresponding hose can be written on a label paper, and then the label paper is pasted in the groove 15 on the display board 14 above the corresponding hose, so that the staff can accurately distinguish each hose.

[0032] Furthermore, the thermal conductivity cell body adopts a stainless steel cylindrical structure, on which there are two vertical parallel holes with threads on the upper ends for accommodating gold-plated micro-spiral thermistors. The two gold-plated micro-spiral thermistors are sealed in the parallel holes by compression bolts. Each parallel hole is connected to two small transverse holes on the upper and lower sides. Each small transverse hole is welded with a stainless steel tube. The two upper stainless steel tubes are venting tubes and are respectively led out from the left and right side holes of the stainless steel insulation box. The other ends of the two lower stainless steel tubes are respectively passed through the left and right bottom holes on the bottom surface of the stainless steel insulation box and are respectively welded to the air outlet holes at the upper ends of the two chromatographic column connectors. The lower ends of the two chromatographic column connectors are provided with column threads, and the lower end surfaces are provided with chromatographic column holes with bell mouths at the lower ends, which are just connected to the air outlet holes at the upper ends. There are respectively two connectors in the middle. A tail-blowing air hole connected with the hole for installing the chromatographic column, each tail-blowing air hole is welded with a tail-blowing stainless steel pipe for passing the tail-blowing air; the upper end of the chromatographic column connector is processed into a locking pin, which is locked at the bottom of the stainless steel insulation box by the locking pin, and a metal heating block is locked at the bottom of the stainless steel insulation box by a locking shaft, and there are two non-sensitive stainless steel heating rods and a platinum thermal resistor in the metal heating block. The two non-sensitive stainless steel heating rods are longitudinally and parallelly placed in the metal heating block, and the platinum thermal resistor is placed above the two non-sensitive stainless steel heating rods. The heat conducting cell body is fixed on the metal heating block by a fixing bolt, and the leads of two gold-plated micro-spiral thermistors are led out from the holes on the insulation box; the above components are all installed in the insulation box 1, and the insulation silicon wool board is installed around the insulation box 1, and the internal space surrounded by the silicon wool board is filled with micro-glass beads.

[0033] Working principle: After moving the cross bar 2 to a suitable position along the guide plate 9, fix it by the fixing assembly, and then push the two clamping plates 4 in the same group to both sides along the slide groove 3 respectively, and then place the hose connected to the device between the corresponding group of clamping plates 4, and the reverse elastic force of the spring 6 acts on the clamping plate 4 to clamp the hose, so that multiple hoses are separated from each other and will not be entangled together, write the connection part of the corresponding hose on the label paper, and then stick the label paper in the groove 15 on the display board 14 above the corresponding hose, so that the staff can accurately distinguish each hose.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A constant temperature thermal conductivity cell detection device for an oxygen, nitrogen and hydrogen analyzer, comprising an insulation box (1), characterized in that: The outer wall of the heat preservation box (1) is provided with a cross bar (2), and a plurality of evenly distributed slide grooves (3) are opened on the cross bar (2). A pair of clamping plates (4) are slidably connected in the slide groove (3), and the cross section of the clamping plate (4) is arc-shaped. A positioning column (5) is fixed in the slide groove (3), and the positioning column (5) passes through a positioning hole (7) on the clamping plate (4). A pair of springs (6) are sleeved on the positioning column (5), and the two ends of the spring (6) are respectively fixed on the side wall of the slide groove (3) and the clamping plate (4).

2. The constant temperature thermal conductivity cell detection device for oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: The end of the clamping plate (4) is provided with an introduction portion (8) formed integrally therewith, the introduction portion (8) has an arc-shaped cross section, and the two introduction portions (8) together form an eight-shaped shape.

3. The constant temperature thermal conductivity cell detection device for oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: A pair of guide plates (9) are fixed on the outer wall of the heat preservation box (1), and the guide plates (9) are slidably connected with a pair of guide blocks (10) on the cross bar (2). After the cross bar (2) is moved to a suitable position along the guide plates (9), the position of the cross bar (2) is fixed by a fixing assembly.

4. The constant temperature thermal conductivity cell detection device for oxygen, nitrogen and hydrogen analyzer according to claim 3, characterized in that: The fixing assembly comprises a first ear block (12) fixed on the heat preservation box (1), an adjusting screw (13) is rotatably connected to the first ear block (12), and the adjusting screw (13) is threadedly connected to a threaded hole (11) on the cross bar (2).

5. The constant temperature thermal conductivity cell detection device for oxygen, nitrogen and hydrogen analyzer according to claim 3, characterized in that: The fixing assembly comprises a second ear block (16) on the guide block (10), a knob (17) being threadedly connected to the second ear block (16), and a pressure plate (18) capable of pressing against the guide plate (9) being rotatably connected to the bottom end of the knob (17).

6. The constant temperature thermal conductivity cell detection device for oxygen, nitrogen and hydrogen analyzer according to claim 1, characterized in that: A plurality of display boards (14) corresponding to the slide grooves (3) are fixed on the top of the crossbar (2), and grooves (15) are provided on the display boards (14).

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