Cable pyrolysis characteristic gas detection system

Abstract

The invention relates to a cable pyrolysis characteristic gas detection system in the technical field of cable pyrolysis. The cable pyrolysis characteristic gas detection system comprises an infrared spectrometer, a gas detector, a gas collection bottle and a cooling bottle filled with an alkaline solution, the infrared spectrometer comprises a supporting vertical frame, the upper end and the lower end of the supporting vertical frame are provided with a light emitter and a detector respectively, and two cantilever rods are symmetrically fixed to the two sides of the middle of the supporting vertical frame. The gas collecting bottle comprises a bottle body part and two bottle neck parts, the bottle body part is made of a transparent heat-resistant material capable of expanding along with internal pressure, the outer walls of the two bottle neck parts are connected to the outer ends of the two cantilever rods respectively, and outer ports of the two bottle neck parts are provided with a gas inlet and a gas outlet respectively; an exhaust conduit and a gas inlet conduit with the lower end extending into the bottle bottom are inserted into the bottle plug of the cooling bottle, the upper end of the gas inlet conduit is correspondingly communicated with the exhaust port of the gas collecting bottle, and the upper end of the exhaust conduit is correspondingly communicated with the gas inlet end of the gas detector; the characteristic gas detection system ensures portability and rapid detection, and can improve the accuracy of detected gas types and components.

Description

Technical Field

[0001] The invention relates to the technical field of cable pyrolysis, and in particular to a cable pyrolysis characteristic gas detection system. Background Art

[0002] It is well known that cables will release a large amount of gas when a fire occurs. The composition and characteristics of these gases can provide key information about the severity and extensibility of the fire. By analyzing the gas components released during the pyrolysis process, it can help determine the early stage of the fire and provide data support for fire warning and emergency response. Existing gas composition analysis instruments are very mature, mainly including Fourier transform infrared spectrometers, and gas detectors based on electrochemical sensors and semiconductors. The instrument with the highest sensitivity, the most accurate quantitative analysis, and the most complex measurement types is the gas chromatograph. However, the disadvantages of the gas chromatograph are that it is expensive, large in size, and has a slow detection speed, which is not conducive to portability and rapid detection. Although infrared spectrometers and gas detectors are small, portable and quick to detect, they also have their own shortcomings. For example, infrared spectrometers have high requirements for gas pressure and stability and poor sensitivity to low-concentration gases, while gas detectors can only detect a limited number of gases and have low temperature requirements for the detected gases. These limitations will lead to a decrease in detection results and large deviations. Summary of the invention

[0003] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the present invention discloses a cable pyrolysis characteristic gas detection system, which can improve the accuracy of detecting gas types and components while ensuring portability and rapid detection.

[0004] To achieve the above object, the present invention adopts the following technical solution: A cable pyrolysis characteristic gas detection system comprises an infrared spectrometer, a gas detector, a gas collecting bottle and a cooling bottle filled with an alkaline solution; the infrared spectrometer comprises a supporting stand, the upper and lower ends of the supporting stand are respectively equipped with corresponding light emitters and detectors, and two cantilever rods are symmetrically fixed on both sides of the middle part of the supporting stand; the gas collecting bottle comprises a bottle body and two bottlenecks symmetrically arranged at both ends of the bottle body, the bottle body is made of a transparent heat-resistant material that can expand with internal pressure, the outer walls of the two bottlenecks are respectively connected to the outer ends of the two cantilever rods, and the outer ports of the two bottlenecks are respectively set as an air inlet and an exhaust port with switch valves; the bottle plug of the cooling bottle is installed with an exhaust duct and an air inlet duct whose lower end extends into the bottom of the bottle, the upper end of the air inlet duct is correspondingly connected to the exhaust port of the gas collecting bottle, and the upper end of the exhaust duct is correspondingly connected to the air inlet end of the gas detector.

[0005] Furthermore, a telescopic cylinder is installed on the side of the gas collecting bottle away from the supporting stand, and an extrusion plate corresponding to the bottle body is fixed to the end of the telescopic rod of the telescopic cylinder.

[0006] Furthermore, a card set corresponding to the bottle neck portion is installed at the outer end of the cantilever rod.

[0007] Furthermore, the bottle body is made of a transparent film-like polytetrafluoroethylene, polycarbonate or polyimide material.

[0008] Furthermore, the alkaline solution is set to be sodium hydroxide or sodium carbonate solution.

[0009] Furthermore, a one-way valve for one-way conduction of air intake is installed at the upper end of the air intake conduit.

[0010] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: The cable pyrolysis characteristic gas detection system disclosed in the present invention adopts a smaller, more portable, and faster detecting infrared spectrometer and a gas detector for serial joint detection, and utilizes an expandable gas collecting bottle to facilitate gas collection and release while reducing the pressure of collecting characteristic gases to ensure the stability of the detected gas; after the gas detected by the infrared spectrometer enters a cooling bottle filled with an alkaline solution, it can be cooled and absorb high-concentration acidic soluble gases that cannot be detected by the gas detector, thereby facilitating the gas detector to detect subsequent characteristic gases and reducing the emission of harmful gases after detection, and finally, after combining the detection data of the infrared spectrometer, it can greatly improve the overall detection types and detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the implementation structure of the present invention; Figure 2 It is a side view structural schematic diagram of the infrared spectrometer.

[0012] In the figure: 1, gas collecting bottle; 101, bottle body; 102, bottle neck; 2, card set; 3, cooling bottle; 4, gas detector; 5, infrared spectrometer; 501, supporting stand; 502, detector; 503, light emitter; 6, cantilever rod; 7, telescopic cylinder; 8, extrusion plate. DETAILED DESCRIPTION

[0013] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present invention and are for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0014] Combined with Figure 1-2The cable pyrolysis characteristic gas detection system comprises an infrared spectrometer 5, a gas detector 4, a gas collecting bottle 1 and a cooling bottle 3 filled with an alkaline solution. Generally, the alkaline solution is set as a sodium hydroxide solution or a sodium carbonate solution, which is mainly used to absorb acidic harmful gases and sulfide harmful gases generated by cable pyrolysis, such as hydrogen chloride, hydrogen cyanide, hydrogen sulfide, etc.; the infrared spectrometer 5 comprises a support frame 501, and the upper and lower ends of the support frame 501 are respectively equipped with a corresponding light emitter 503 and a detector 502, and two cantilever rods 6 are symmetrically fixed on both sides of the middle of the support frame 501. The infrared spectrometer 5 is a mature instrument for molecular structure and chemical composition analysis by using the absorption characteristics of infrared radiation of different wavelengths of a substance. Its detection method is a prior art and will not be described in detail here; The gas collecting bottle 1 comprises a bottle body 101 and two bottlenecks 102 symmetrically arranged at both ends of the bottle body 101. The bottle body 101 is made of a transparent heat-resistant material that can expand with the internal pressure. Specifically, the bottle body 101 is made of a transparent film-like polytetrafluoroethylene, polycarbonate or polyimide material, which has a certain flexibility or elasticity to meet the needs of gas collection and swelling to expand the volume, can reduce the pressure of the collected gas, ensure the stability of the gas, and because the temperature of the pyrolysis gas is relatively high, it meets the heat resistance requirements and also meets the transparent light transmission requirements of instrument detection; the bottleneck 102 is a hard material, and the outer walls of the two bottlenecks 102 can be respectively connected to the outer ends of the two cantilever rods 6, so that the gas collecting bottle 1 can be supported and maintained on the light emitter 503. and the detector 502, so as to facilitate detection; the outer ports of the two bottleneck parts 102 are respectively set as the air inlet and the exhaust port with the switch valve, which are respectively used to collect the characteristic gas and release the characteristic gas after detection; as needed, a telescopic cylinder 7 is installed on the side of the gas collecting bottle 1 away from the supporting stand 501, and the telescopic rod end of the telescopic cylinder 7 is fixed with the extrusion plate 8 corresponding to the bottle body 101. In order to ensure that the characteristic gas in the bottle body 101 can be released relatively cleanly after the exhaust port switch valve is opened, the bottle body 101 can be squeezed manually, or the extrusion plate 8 can be pushed by the telescopic rod 7 to move and squeeze the bottle body 101; in addition, the outer end of the cantilever rod 6 is installed with a card set 2 corresponding to the sleeve of the bottleneck part 102, and the card set 2 is generally set as a quick-release clamp; The bottle plug of the cooling bottle 3 is equipped with an exhaust duct and an air inlet duct whose lower end extends into the bottom of the bottle, the upper end of the air inlet duct is connected to the exhaust port of the gas collecting bottle, and the upper end of the exhaust duct is connected to the air inlet end of the gas detector 4, so that the gas released from the bottle body 101 can enter from the air inlet duct, and the insoluble gas is discharged after cooling, such as hydrocarbon gas, carbon dioxide, carbon monoxide, etc., and enters the gas detector 4 for detection; according to needs, a one-way valve for one-way air intake is installed at the upper end of the air inlet duct to prevent the alkali solution in the cooling bottle 3 from flowing back.

[0015] The cable pyrolysis characteristic gas detection system described in the present invention is implemented by closing the switch valve of the exhaust port of the gas collecting bottle 1, opening the switch valve of the air inlet, and injecting the collected high-temperature cable pyrolysis characteristic gas into the bottle body 101. At the same time, the bottle body 101 adaptively expands and reduces pressure, and then closes the switch valve of the air inlet, and uses the infrared spectrometer 5 to perform gas detection. After the detection, open the switch valve of the exhaust port of the gas collecting bottle 1 to allow the gas to enter the cooling bottle 3 through the air inlet duct for cooling. After some harmful gases dissolved in alkali solution are absorbed, the remaining gas enters the gas detector 4 for detection. After integrating the detection data of the infrared spectrometer, the overall detection types and detection accuracy can be greatly improved.

[0016] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A cable pyrolysis characteristic gas detection system, characterized by: The invention comprises an infrared spectrometer (5), a gas detector (4), a gas collecting bottle (1) and a cooling bottle (3) containing an alkaline solution; the infrared spectrometer (5) comprises a supporting frame (501), the upper end and the lower end of the supporting frame (501) are respectively provided with a light emitter (503) and a detector (502) corresponding to each other, and two cantilever rods (6) are symmetrically fixed on both sides of the middle part of the supporting frame (501); the gas collecting bottle (1) comprises a bottle body (101) and two bottle caps symmetrically arranged at the two ends of the bottle body (101). The bottle body (101) is made of a transparent heat-resistant material that can expand with internal pressure, the outer walls of the two bottlenecks (102) are respectively connected to the outer ends of the two cantilever rods (6), and the outer ports of the two bottlenecks (102) are respectively set as an air inlet and an air outlet with a switch valve; the bottle plug of the cooling bottle (3) is equipped with an exhaust duct and an air inlet duct whose lower end extends into the bottom of the bottle, the upper end of the air inlet duct is correspondingly connected to the exhaust port of the gas collecting bottle, and the upper end of the exhaust duct is correspondingly connected to the air inlet end of the gas detector (4).

2. The cable pyrolysis characteristic gas detection system according to claim 1 is characterized in that: A telescopic cylinder (7) is installed on the side of the gas collecting bottle (1) away from the supporting stand (501), and a squeezing plate (8) corresponding to the bottle body (101) is fixed to the end of the telescopic rod of the telescopic cylinder (7).

3. The cable pyrolysis characteristic gas detection system according to claim 1 is characterized in that: The outer end of the cantilever rod (6) is mounted with a card assembly (2) that corresponds to the bottle neck portion (102).

4. The cable pyrolysis characteristic gas detection system according to claim 1 is characterized in that: The bottle body (101) is made of a transparent film-like polytetrafluoroethylene, polycarbonate or polyimide material.

5. The cable pyrolysis characteristic gas detection system according to claim 1 is characterized in that: The alkaline solution is set to be sodium hydroxide or sodium carbonate solution.

6. The cable pyrolysis characteristic gas detection system according to claim 1 is characterized by: A one-way valve for one-way conduction of air intake is installed at the upper end of the air intake conduit.

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