Heatable gas sampling pipe of reflow soldering furnace

Abstract

The invention relates to a heatable reflow soldering furnace gas sampling pipe which is connected with an oxygen analyzer and used for monitoring the PPM level of oxygen in a hearth of a reflow soldering furnace. The heatable reflow oven gas sampling tube comprises a sampling tube body, a heating rod, a TC detection assembly, a protective cover assembly and a quick connector, the heating rod is fixed on the sampling tube body so as to maintain the temperature of the sampling tube body; the detection TC assembly is fixed on the sampling pipe body so as to monitor the temperature of the sampling pipe body in real time; the protective cover assembly is fixed on the outer side of the sampling tube body so as to prevent the sampling tube body, the heating rod and the TC detection assembly from being exposed; and the quick connector is connected with one end of the sampling pipe body. Compared with the prior art, the temperature of the sampling pipe can be guaranteed, and the situation that scaling powder is accumulated on the sampling pipe due to low temperature of the sampling pipe is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of gas sampling devices, and in particular to a heatable gas sampling tube for a reflow soldering furnace. Background Art

[0002] A nitrogen reflow oven is equipped with a gas sampling tube in the furnace to monitor the oxygen PPM level in the furnace. Most of the gas sampling tubes currently used are simple tubes extending into the furnace, but due to temperature changes inside and outside the furnace, the sampling tube is easily blocked, resulting in inaccurate sampling data in the furnace, which will directly affect the quality of the nitrogen reflow oven.

[0003] CN1378072A discloses a corrosion-resistant heat-tracing sampling composite tube, which has multiple sampling tubes, power lines, and instrument compensation cables. A PCT heat-tracing tape is arranged in the middle of the multiple sampling tubes, and a shielding heat-reflecting film is coated on the outside of the multiple sampling tubes, the PCT heat-tracing tape, the power lines, and the instrument compensation cables. An insulation layer is arranged outside the shielding heat-reflecting film, and a weather-resistant plastic sheath is arranged outside the insulation layer. However, the corrosion-resistant heat-tracing sampling composite tube is an integrated sampling composite tube, which cannot be disassembled. If there is a problem, it can only be replaced as a whole, and there is no heating overload protection measure.

[0004] Therefore, a heatable reflow oven gas sampling tube is urgently needed. Summary of the invention

[0005] The purpose of the present invention is to provide a heatable reflow oven gas sampling tube in order to overcome the defects of the above-mentioned prior art. By setting a heating rod, a detection TC component, and a protective cover component, the temperature of the sampling tube can be guaranteed to prevent the sampling tube from accumulating flux due to low temperature.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The object of the present invention is to provide a heatable reflow soldering furnace gas sampling tube, which is connected to an oxygen analyzer and used to monitor the oxygen PPM level in the furnace of the reflow soldering furnace. The heatable reflow soldering furnace gas sampling tube comprises: a sampling tube body, a heating rod, a detection TC component, a protective cover component, and a quick connector; the heating rod is fixed on the sampling tube body to maintain the temperature of the sampling tube body; the detection TC component is fixed on the sampling tube body to monitor the temperature of the sampling tube body in real time; the protective cover component is fixed on the outside of the sampling tube body to prevent the sampling tube body, the heating rod, and the detection TC component from being exposed; the quick connector is connected to one end of the sampling tube body.

[0008] Furthermore, the detection TC component includes a detection TCI and a detection TC II; the detection TCI and the detection TC II are both tied to the sampling tube body by high-temperature tape.

[0009] Furthermore, the heating rod is tied to the sampling tube body by a high-temperature tape.

[0010] Furthermore, the protective cover assembly includes an upper protective cover I, an upper protective cover II, a lower protective cover I, and a lower protective cover II; the upper protective cover I and the upper protective cover II are respectively fixed to the lower protective cover I and the lower protective cover II by a first fastening assembly; the lower protective cover I and the lower protective cover II are respectively fixed to the outside of the sampling tube body by a second fastening assembly; the lower protective cover I and the lower protective cover II are fixedly connected by a third fastening assembly.

[0011] Furthermore, the first fastening assembly includes a first hexagon socket screw.

[0012] Furthermore, the second fastening assembly includes a second spring washer and a second hexagon socket screw.

[0013] Furthermore, the third fastening assembly includes a third spring washer, a nut, and a third hexagon socket screw.

[0014] Furthermore, one end of the heatable reflow oven gas sampling tube connected to the quick connector is fixed to the side plate of the reflow oven chamber through a fourth fastening assembly.

[0015] Furthermore, the fourth fastening assembly includes a fourth hexagon socket screw and a flat washer.

[0016] Furthermore, the quick connector is connected to the oxygen analyzer via a hose.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1) The technical solution provides a heatable reflow oven gas sampling tube. A heating rod is provided to ensure the temperature of the sampling tube, prevent the accumulation of solder flux in the sampling tube due to low temperature, and ensure stable monitoring performance.

[0019] 2) The technical solution provides a heatable reflow oven gas sampling tube, and a protective cover is provided on the outside of the sampling tube to prevent the sampling tube and the detection TC from being contaminated by flux. At the same time, the entire assembly is easy to install, maintain, and has good sealing.

[0020] 3) The heatable reflow oven gas sampling tube provided by the technical solution is equipped with a detection TC to prevent the heating rod from overheating, and has high safety.

[0021] 4) The heatable reflow oven gas sampling tube provided by the technical solution has only a few simple parts, few connections, simple structure, and easy installation of quick connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an exploded view of the heatable reflow oven gas sampling tube in the technical solution.

[0023] Figure 2 This is a cross-sectional view of a heatable reflow oven gas sampling tube in the technical solution.

[0024] The numbers in the figure show:

[0025] 1. Sampling tube, 2. Heating rod, 3. Detection TCI, 4. Detection TCII, 5. Lower protective cover I, 6. Lower protective cover II, 7. Upper protective cover I, 8. Upper protective cover II, 9. Quick connector, 10. First fastening assembly, 11. Second fastening assembly, 12. Third fastening assembly, 13. Fourth fastening assembly. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The features such as component models, material names, connection structures, control methods, etc. that are not clearly described in this technical solution are all regarded as common technical features disclosed in the prior art.

[0027] Example

[0028] like Figures 1-2 As shown, this embodiment provides a heatable reflow oven gas sampling tube, which is connected to an oxygen analyzer. The heatable reflow oven gas sampling tube is used to monitor the oxygen PPM level in the reflow oven.

[0029] The heatable reflow oven gas sampling tube comprises: a sampling tube body 1, a heating rod 2, a detection TC component, a protective cover component, and a quick connector 9; the heating rod 2 is tied to the sampling tube body 1 by a high-temperature adhesive tape to maintain the temperature of the sampling tube body 1; the detection TC component is fixed to the sampling tube body 1 to monitor the temperature of the sampling tube body 1 in real time; the protective cover component is fixed to the outside of the sampling tube body 1 to prevent the sampling tube body 1, the heating rod 2, and the detection TC component from being exposed; the quick connector 9 is connected to one end of the sampling tube body 1.

[0030] The detection TC component includes detection TCI3 and detection TC II4; detection TCI3 and detection TC II4 are both tied to the sampling tube body 1 by high-temperature tape. TCI3 and detection TC II4 are both thermocouple thermometers, which are used for over-temperature alarm and real-time temperature detection respectively. The protective cover component includes upper protective cover I7, upper protective cover II8, lower protective cover I5, and lower protective cover II6; upper protective cover I7 and upper protective cover II8 are respectively fixed to lower protective cover I5 and lower protective cover II6 by first fastening components; lower protective cover I5 and lower protective cover II6 are respectively fixed to the outside of the sampling tube body 1 by second fastening components; lower protective cover I5 and lower protective cover II6 are fixedly connected by third fastening components.

[0031] The first fastening assembly includes a first hexagon socket screw. In this embodiment, the first hexagon socket screw is an M3X5 hexagon socket screw.

[0032] The second fastening assembly includes a second spring washer and a second hexagon socket screw. In this embodiment, the second hexagon socket screw is an M3X5 hexagon socket screw, and the second spring washer is an M3 spring washer.

[0033] The third fastening assembly includes a third spring washer, a nut, and a third hexagon socket screw. In this embodiment, the third hexagon socket screw is an M3X8 hexagon socket screw, the third spring washer is an M3 spring washer, and the nut is an M3 nut.

[0034] One end of the heatable reflow oven gas sampling tube connected to the quick connector 9 is fixed to the side plate of the reflow oven chamber through a fourth fastening assembly.

[0035] The fourth fastening assembly includes a fourth hexagon socket screw and a flat washer. In this embodiment, the fourth hexagon socket screw is an M5X8 hexagon socket screw, and the flat washer is an M5 flat washer.

[0036] A plurality of mounting plates are mounted on the sampling tube body 1 , and threaded holes are provided on the mounting plates for mounting the second fastening assembly, the third fastening assembly and the fourth fastening assembly respectively.

[0037] The sides of the upper protective cover I7, the upper protective cover II8, the lower protective cover I5 and the lower protective cover II6 are all provided with threaded holes for installing the first fastening component.

[0038] The quick connector 9 is connected to the oxygen analyzer through a hose. The oxygen analyzer is equipped with an air pump, which extracts sample gas from the furnace through the sampling tube body 1. The sample gas is transported to the oxygen analyzer through the sampling tube body 1, the quick connector 9 and the subsequent hose, so as to continuously monitor the oxygen PPM level. The model of the oxygen analyzer is RAPIDOX 1100ZR-H-OL-LC21. When the oxygen analyzer requests attention to an over-standard condition, an audible alarm or a visual alarm will be activated.

[0039] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A heatable reflow oven gas sampling tube, the heatable reflow oven gas sampling tube is connected to an oxygen analyzer, the heatable reflow oven gas sampling tube is used to monitor the oxygen PPM level in the reflow oven, characterized in that: The heatable reflow oven gas sampling tube comprises: a sampling tube body (1), a heating rod (2), a detection TC component, a protective cover component, and a quick connector (9); The heating rod (2) is fixed on the sampling tube body (1) to maintain the temperature of the sampling tube body (1); The detection TC component is fixed on the sampling tube body (1) to monitor the temperature of the sampling tube body (1) in real time; The protective cover assembly is fixed to the outside of the sampling tube body (1) to prevent the sampling tube body (1), the heating rod (2) and the detection TC assembly from being exposed; The quick connector (9) is connected to one end of the sampling tube body (1).

2. A heatable reflow oven gas sampling tube according to claim 1, characterized in that: The TC detection component includes a TC detection component (3) and a TC detection component (4); The detection TCI (3) and the detection TC II (4) are both tied to the sampling tube body (1) by high temperature tape.

3. A heatable reflow oven gas sampling tube according to claim 1, characterized in that: The heating rod (2) is tied to the sampling tube body (1) by means of a high-temperature adhesive tape.

4. A heatable reflow oven gas sampling tube according to claim 1, characterized in that: The protective cover assembly comprises an upper protective cover I (7), an upper protective cover II (8), a lower protective cover I (5), and a lower protective cover II (6); The upper protective cover I (7) and the upper protective cover II (8) are respectively fixed to the lower protective cover I (5) and the lower protective cover II (6) through a first fastening assembly; The lower protective cover I (5) and the lower protective cover II (6) are respectively fixed to the outside of the sampling tube body (1) through a second fastening assembly; The lower protective cover I (5) and the lower protective cover II (6) are fixedly connected via a third fastening assembly.

5. A heatable reflow oven gas sampling tube according to claim 4, characterized in that: The first fastening assembly includes a first hexagon socket screw.

6. A heatable reflow oven gas sampling tube according to claim 4, characterized in that: The second fastening assembly includes a second spring washer and a second hexagon socket screw.

7. A heatable reflow oven gas sampling tube according to claim 4, characterized in that: The third fastening assembly includes a third spring washer, a nut, and a third hexagon socket screw.

8. A heatable reflow oven gas sampling tube according to claim 1, characterized in that: One end of the heatable reflow oven gas sampling tube connected to the quick connector (9) is fixed to the side plate of the reflow oven chamber via a fourth fastening assembly.

9. A heatable reflow oven gas sampling tube according to claim 8, characterized in that: The fourth fastening assembly includes a fourth hexagon socket screw and a flat washer.

10. A heatable reflow oven gas sampling tube according to claim 1, characterized in that: The quick connector (9) is connected to the oxygen analyzer via a hose.

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