VOC detector

Abstract

The utility model provides a VOC detector, which comprises a detector main body and a detector circuit structure arranged in the detector main body, the detector main body comprises a shell and end covers buckled on the two sides of the shell, an end rod is slidably connected to the shell, the shell comprises a base part and a shielding net part, the shielding net part accounts for half of the area of the shell, and the shielding net part is arranged in the shell. Each end cover is provided with a fixing plate, the fixing plates are arranged on the side faces, away from the shell, of the end covers, each fixing plate is provided with a fixing hole used for allowing a screw to be inserted therein, and the base parts are located on the two side faces without the end covers and provided with fixing grooves which are formed in the length direction of the base parts and used for being fixed to reserved clamping grooves in the electrical cabinet. According to the detector, the VOC concentration in various electrical cabinets can be measured, the accuracy rate is high, in addition, the large-area setting of the shielding net part can ensure that the VOC is more comprehensively and rapidly detected, and meanwhile, the fixing groove suitable for the reserved clamping groove of the electrical cabinet is arranged so that the detector can be fixed by adapting to different electrical cabinets.

Description

Technical Field

[0001] The present application relates to the technical field of electrical cabinet monitoring, and in particular to a VOC detector. Background Art

[0002] The power industry is a crucial energy source for national production and life, as well as for the economic development of various sectors. It is closely linked to both people's livelihoods and economic development. The power industry is primarily divided into several phases: power generation, transmission, distribution, sales, and consumption. Each phase requires a large number of various types of electrical cabinets to perform functions such as energy distribution, transmission, control, and circuit protection. Consequently, with rapid economic development and a growing population, the use of electrical cabinets has steadily increased. Electrical cabinets contain numerous cables, which can cause electrical fires due to short circuits, overloads, improper installation, poor contact, and poor ventilation. Cable combustion occurs in three steps: First, the cable's organic polymer composition softens due to heat. Second, the polymer's increased temperature produces various volatile organic compounds (VOCs). Once the VOCs reach a flammable concentration, the cable begins to ignite. Currently, electrical fire monitoring relies primarily on temperature detection equipment, but this method has limitations and may not accurately detect early signs of a fire. Summary of the Invention

[0003] The embodiments of the present application provide a VOC detector to at least solve the problem in the related art that early signs of fire cannot be accurately detected.

[0004] According to one embodiment of the present application, a VOC detector is provided, including a detector body and a detector circuit structure arranged in the detector body, the detector body includes a shell and end covers buckled on both sides of the shell, and the end rod is slidably connected to the shell, the shell includes a base portion and a shielding net portion, the shielding net portion occupies half of the area of ​​the shell, each of the end covers is provided with a fixing plate, the fixing plate is arranged on a side surface of the end cover away from the shell, a fixing hole for inserting a screw is provided on the fixing plate, the base portion is located on two side surfaces other than the end cover, and is provided with a fixing groove arranged along the length direction of the base portion and used to fix the reserved card slot on the electrical cabinet.

[0005] Furthermore, the base portion and the shielding net portion are both configured as base portions and shielding net portions with a "C"-shaped cross-section, and the base portion and the shielding net portion together constitute a shell with a "mouth"-shaped cross-section.

[0006] Furthermore, a plurality of mesh openings are evenly distributed on the shielding mesh portion, and the mesh openings are hexagonal mesh openings.

[0007] Further, one of the end covers has a terminal interface for an external terminal.

[0008] Further, each of the end covers is provided with a magnet on a side close to the fixing plate for directly adsorbing on the electrical cabinet of iron.

[0009] Further, the circuit structure comprises a 5V voltage circuit for converting power supply into 5V voltage, a 3.3V voltage circuit connected with the 5V voltage circuit for converting the 5V voltage circuit into 3.3V voltage, a VOC concentration detection circuit and an MCU circuit connected with the 3.3V voltage circuit and powered by the 3.3V voltage circuit, a digital isolation circuit connected with the 5V voltage circuit, and a bus communication circuit connected with the digital isolation circuit, the bus communication circuit being connected with the MCU circuit.

[0010] Through the present application, the VOC concentration in various electrical cabinets is measured, and the fire alarm situation is predicted according to the characteristic that the cable will volatilize VOC when heated. Compared with the traditional temperature-based detector for detecting fire alarm situation, the VOC detector is more suitable for use in the electrical cabinet and has higher accuracy. In addition, the large-area setting of the shielding net part can ensure that the VOC is more comprehensively and quickly detected. At the same time, the fixing groove suitable for the reserved card slot of the electrical cabinet, the fixing plate which can be used for inserting screws, and the magnet provided on the end cover are set, and the end cover is in sliding connection with the shell. The fixing of the detector can be realized by adapting to different electrical cabinets. At the same time, the digital isolation circuit is designed to ensure the isolation between the input and output signals and improve the stability of the circuit. BRIEF DESCRIPTION OF DRAWINGS

[0011] The accompanying drawings, which are included to provide a further understanding of the present application, form a part of the present application and illustrate the illustrative embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0012] Figure 1 The structural schematic diagram provided for the embodiment of the present application;

[0013] Figure 2 The side surface schematic diagram embodying the fixing groove provided for the embodiment of the present application;

[0014] Figure 3 The lower bottom surface schematic diagram embodying the fixing plate provided for the embodiment of the present application;

[0015] Figure 4 The circuit connection structure schematic diagram provided for the embodiment of the present application;

[0016] Figure 5 The MCU circuit schematic diagram provided for the embodiment of the present application;

[0017] Figure 6 A schematic diagram of a 5V voltage circuit provided in an embodiment of the present application;

[0018] Figure 7 A schematic diagram of a bus communication circuit provided in an embodiment of the present application;

[0019] Figure 8 Schematic diagram of a 3.3V voltage circuit provided in an embodiment of the present application;

[0020] Figure 9 A schematic diagram of a digital isolation circuit provided in an embodiment of the present application;

[0021] Figure 10 Schematic diagram of the VOC concentration detection circuit provided in an embodiment of the present application.

[0022] In the figure, 1, housing; 2, end cover; 11, base; 12, shielding net; 121, network port; 13, fixing groove; 21, terminal interface; 22, fixing plate; 221, fixing hole; 3, magnet; 41, MCU circuit; 42, bus communication circuit; 43, 5V voltage circuit; 44, 3.3V voltage circuit; 45, digital isolation circuit;

[0023] 46. ​​VOC concentration detection circuit. DETAILED DESCRIPTION

[0024] The following will describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] Example: A VOC detector, such as Figure 1 As shown, it includes a detector body and a detector circuit structure, wherein the detector body is a rectangular parallelepiped as a whole, including a shell 1 and end covers 2 located on both sides of the shell 1, as shown in FIG. Figure 1As shown in the middle, the shell 1 is divided into two parts, the base part 11 and the shielding net part 12, in this embodiment, the base part 11 and the shielding net part 12 are both set as the base part 11 and the shielding net part 12 with the cross section of the "C" type, the base part 11 and the shielding net part 12 together constitute the shell 1 with the cross section of the "mouth" type, that is, the shell 1 is hollow inside, wherein the upper surface of the shell 1 in the figure is completely a part of the shielding net part 12, the lower bottom surface of the shell 1 is completely a part of the base part 11, except the two sides covered by the end cover 2, the shell 1 is the upper half part of the shielding net part 12 and the lower half part of the base part 11, the above-mentioned base part 11 is used to accommodate the circuit structure part of the detector due to the design of the groove shape, the above-mentioned shielding net part 12 is to ensure that VOC can enter the inside of the shell 1, so that the circuit structure part of the detector can monitor VOC. The above-mentioned shielding net part 12 is made of 304 tempered material, the mesh opening 121 of the shielding net part 12 is uniformly opened as a hexagonal mesh opening 121, which can ensure that the shielding net part 12 can maintain good performance of monitoring VOC while maintaining good support and protection, preventing the circuit from being separated from the inside of the shell 1, and at the same time ensuring that the circuit inside is not easily damaged. The above-mentioned base part 11 is made of 6063 aluminum alloy material, which can ensure that the circuit structure is accommodated while maintaining good support and protection, and the weight is relatively light, and the material of the shielding net part 12 is different from that of the shielding net part 12 because the shielding net part 12 is more backward, and the shielding net made of aluminum alloy material is not hard enough. The above-mentioned base part 11 is located on the two sides of the shell 1 which are not the end cover 2, and is provided with a fixed groove 13 which is arranged in the length direction of the base part 11, the fixed groove 13 includes a plurality of parallel arranged, a reserved clamping groove is arranged above a part of the electrical cabinet, and the fixed groove 13 can be fixed on the upper side of the electrical cabinet by cooperating with the reserved clamping groove.

[0026] Referring to Figure 2 and Figure 3As shown in the figure, the two end covers 2 are arranged on both sides of the shell 1 in the length direction, the end cover 2 is square, and is buckled on the shell 1, the two end covers 2 are in sliding connection with the shell 1, and can be disassembled in the length direction of the shell 1, when it is needed to fix the detector on the electrical cabinet with the reserved clamping groove, the end cover 2 is disassembled, the fixed clamping groove is slid into the slide way on the reserved clamping groove, then the end cover 2 is covered, and the fixing of the detector is completed. One end cover 2 is reserved with a terminal interface 21, which can be used for external terminals, a fixing plate 22 is arranged on each end cover 2, the fixing plate 22 is fixed on the side, away from the shell 1, of the end cover 2 and is located on the side close to the base part 11, the fixing plate 22 is arranged in the length direction of the shell 1 and extends away from the shell 1. A fixing hole 221 is formed in the fixing plate 22, the fixing hole 221 is used for fixing the detector on the electrical cabinet without the reserved clamping groove, and the fixing manner is that a screw is screwed into the fixing hole 221 to fix the detector on the electrical cabinet. Meanwhile, a magnet 3 is arranged on one side of each end cover 2 close to the fixing plate 22, and can be directly adsorbed on the iron electrical cabinet.

[0027] With reference to Figure 4 As shown in the figure, the circuit structure mainly includes the following parts: MCU circuit 41, bus communication circuit 42, 5V voltage circuit 43, 3.3V voltage circuit 44, digital isolation circuit 45, and VOC concentration detection circuit 46.

[0028] With reference to Figures 5-10As shown, MCU circuit 41 is designed with STM32F103RCT6 chip. Bus communication circuit is designed with TJA1050 transceiver, and digital isolation circuit 45 is designed with CA-IS3722HS digital isolator. Power supply circuit is designed with buck chip MP2459GJ and buck chip RT9193-33GB. The detector is powered by 24V DC voltage, which is converted to 5V voltage by buck chip MP2459GJ. 5V voltage powers digital isolation circuit 45 and bus communication circuit. 5V voltage passes through B0505S-1WR3 isolation power module to output 5V circuit voltage, which functions to isolate the input power supply and provide single-channel protection. 5V voltage passes through RT9193-33GB buck chip to convert circuit voltage to 3.3V supply voltage, which powers the sensor module and the single-chip microcomputer. 5V voltage powers CA-IS3722HS digital isolator, which has high insulation capacity. The digital isolator chip isolates the signal between the input and output through electrical isolation technology, avoids signal interference, reduces electromagnetic interference, prevents the generation of ground loop, and improves the stability and reliability of the circuit. 5V voltage then passes through the bus communication circuit designed by TJA1050, which receives and transmits CAN bus data. VOC concentration detection circuit 46 is designed with KQM6600TAU gas sensor module, which is used to collect and detect VOC concentration in the environment. It has temperature and humidity self-compensation function to avoid affecting the detection results during operation. It also has the characteristics of small size, low power consumption, high sensitivity, and fast response. The module is soldered to the circuit board through the pin array. The single-chip microcomputer is designed with STM32F103RCT6, which can perform internal AD conversion and process the collected information. The circuit design has three indicator lights: red for VOC concentration alarm, yellow for circuit failure, and green for detector power on.

[0029] Through this embodiment, the VOC concentration in various electrical cabinets is measured, and the fire alarm situation is predicted according to the characteristic that the cable will volatilize VOC when heated. Compared with the traditional temperature-based detector for detecting fire, the VOC detector is more suitable for use in electrical cabinets and has higher accuracy. In addition, the large area of the shielding net part 12 can ensure that VOC is more comprehensive and quickly detected. At the same time, the fixed groove 13 suitable for the reserved card slot of the electrical cabinet, the fixed plate 22 for inserting screws, and the magnet 3 arranged on the end cover 2 are provided, which can realize the fixation of the detector in different electrical cabinets by cooperating with the sliding connection of the end cover 2 with the shell 1.

[0030] The terms "first", "second", and the like in the description and in the claims of the present application and above drawings are used for distinguishing between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely employed for descriptive purposes.

[0031] The terminology used in the present application, unless to the contrary, is intended to include all technical and scientific equivalent terms or variations thereof. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising", or "includes" and / or "including" when used in this specification, specify the presence of stated features, integers, steps, operations, elements, or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or groups thereof.

[0032] Depending on the context, the word "if" or "if" can be interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting", as used herein. Similarly, the phrase "if determined" or "if detecting (a stated condition or event)" can be interpreted to mean "when determined" or "in response to determining" or "when detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)", depending on the context.

[0033] The above, the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A VOC detector, characterized in that, The utility model provides a kind of probe, including probe main body and the probe circuit structure being arranged in probe main body, the probe main body includes shell (1) and the end cap (2) being buckled in both sides of shell (1), and the end cap (2) is slidably connected on shell (1), the shell (1) includes base portion (11) and shielding net portion (12), the shielding net portion (12) occupies half of the area of the shell (1), a fixed plate (22) is arranged on each end cap (2), the fixed plate (22) is arranged on the side face of the end cap (2) away from shell (1), a fixing hole (221) for inserting screw is opened in the fixed plate (22), the base portion (11) is located on the two side faces of non-end cap (2), and is provided with fixed recess (13) for fixing in the length direction of base portion (11) and the reserved clamping slot of electrical cabinet.

2. A VOC detector according to claim 1, wherein, The base portion (11) and the shielding net portion (12) are both arranged as the base portion (11) and the shielding net portion (12) with the section of "C” type, and the base portion (11) and the shielding net portion (12) jointly form the shell (1) with the section of "K” type.

3. A VOC detector according to claim 2, wherein, The shielding net portion (12) is uniformly distributed with a plurality of mesh openings (121), and the mesh opening (121) is a hexagonal mesh opening (121).

4. The VOC detector of claim 1, wherein, One of the end caps (2) has a terminal interface (21) for external terminals.

5. The VOC detector of claim 1, wherein, Each end cap (2) is provided with a magnet (3) for directly adsorbing on the iron electrical cabinet on one side face close to the fixed plate (22).

6. The VOC detector of claim 1, wherein, The circuit structure includes a 5V voltage circuit (43) for converting power supply into 5V voltage, a 3.3V voltage circuit (44) connected with the 5V voltage circuit (43) for converting the 5V voltage circuit (43) into 3.3V voltage, a VOC concentration detection circuit (46) and MCU circuit (41) connected with the 3.3V voltage circuit (44) and powered by the 3.3V voltage circuit (44), a digital isolation circuit (45) connected with the 5V voltage circuit (43), and a bus communication circuit (42) connected with the digital isolation circuit (45), wherein the bus communication circuit (42) is connected with the MCU circuit (41).

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