Pluggable fixed gas detector

Abstract

The utility model relates to the technical field of gas detection devices, in particular to a plug-in type fixed gas detector. Comprising a shell, a main control board arranged in the shell and used for processing and transmitting electric signals, a hole formed in the shell, a probe plugging piece matched with the hole and electrically connected with the main control board, and a detector plugged in the jack and used for detecting gas, the detector comprises a first probe provided with a circuit board for processing electric signals of the gas sensor, and a second probe inserted below the first probe and provided with the gas sensor matched with the circuit board. The probe has the advantages of convenience in installation and maintenance, no influence on operation of a monitoring system, simplicity and convenience in calibration and parameter operation and the like, the installation and replacement steps are simplified by a plug-in structure, the safety is improved by a self-locking switch, sensing data are centrally calibrated and processed by the probe, convenience is brought to calibration and plug-in use, and the probe is suitable for a multi-detector network scene.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection devices, and in particular to a pluggable fixed gas detector. Background Art

[0002] A fixed gas detector is a device used to detect the concentration of specific gases in the environment, and is widely used in industrial production, petrochemical industry, coal mines, electric power, environmental protection, metallurgy, aerospace and scientific research experiments and other fields. Its main function is to timely detect gas leakage and monitor gas concentration changes to prevent the occurrence of safety accidents such as fires, explosions, and poisonings. A gas detector usually consists of a probe, a sensor, a control circuit, an alarm device, etc. When the gas concentration exceeds the set threshold, the alarm device will emit an audible and visual alarm signal to remind the staff to take corresponding measures.

[0003] Traditional fixed gas detectors have exposed a series of problems in practical applications. First of all, the installation method of its probe is extremely cumbersome, requiring multiple complex steps, including power-off, disassembling the circuit board module, connecting the cable to the designated terminal, installing the circuit board module, and re-powering on, etc. This not only requires a variety of tools, but also the power-off operation will affect the normal operation of the entire monitoring system. Especially when there are multiple detectors forming a network at the user site, it is extremely difficult to power off a single detector, seriously affecting work efficiency. In addition, the sensors of existing fixed gas detectors have a short service life and need to be regularly overhauled and replaced, causing great inconvenience. In addition, the display screen inside the detector is abnormal, and it also needs to be disassembled for repair, which is very inconvenient.

[0004] In terms of the calibration and parameter operation of the detector, the operation of existing instruments usually needs to be carried out on-site. The staff needs to carry a standard gas cylinder to calibrate each instrument installed on-site one by one, and at the same time, operations such as modifying and adjusting the instrument parameters also need to be completed on-site. This method is not only time-consuming and laborious in actual operation, but also extremely difficult to operate on-site in some harsh environments, bringing great inconvenience to the maintenance and repair of the instruments.

[0005] In summary, in order to ensure production safety and improve work efficiency, it is urgent to innovate and improve the structure and function of fixed gas detectors to solve the many problems existing in existing products. Summary of the Utility Model

[0006] In order to solve the problems of difficult disassembly and calibration of the probe of the fixed gas detector, the utility model provides a fixed gas detector with a pluggable probe.

[0007] A pluggable fixed gas detector provided by the utility model adopts the following technical solutions:

[0008] A pluggable fixed gas detector, comprising a housing, a main control board disposed inside the housing for processing and transmitting electrical signals, a hole provided on the housing, a probe plug-in member that cooperates with the hole and is electrically connected to the main control board, the probe plug-in member being provided with a jack on the outer side of the hole facing outward, a detector plugged into the jack for detecting gas, the detector including a first probe equipped with a circuit board for processing electrical signals of a gas sensor, and a second probe plugged under the first probe and equipped with a gas sensor adapted to the circuit board.

[0009] Further, the housing includes a front cover, a front sealing ring disposed inside the front cover, a central axis threadedly connected to the front cover, a rear cover threadedly connected to the central axis and disposed behind the central axis, a rear sealing ring disposed inside the rear cover, the front cover including a perspective window provided with a glass cover, the central axis including an externally threaded through-hole tube provided on the side wall, a through-tube provided on the lower side of the central axis, wherein the probe plug-in member is fixedly installed in the through-tube.

[0010] Further, a support plate is fixedly installed inside the central axis, the main control board is disposed in the support plate, a display board for displaying detection results is plugged into the support plate, and the back surface of the display board is connected to the main control board through a wire.

[0011] Further, an expansion plug-in member is provided in the externally threaded through-hole tube, the expansion plug-in member is electrically connected to the main control board, and a plug for closing the hole tube is detachably screwed and installed on the externally threaded through-hole tube.

[0012] Further, a lighting alarm is externally connected to the externally threaded through-hole tube, the lighting alarm including an alarm lamp, an expansion plug inserted into the externally threaded through-hole tube, and a connecting member screwed onto the externally threaded through-hole tube.

[0013] Further, a self-locking switch for controlling the power on and off of the main control board is provided inside the probe plug-in member, and a relay controlled by the self-locking switch is provided on the main control board.

[0014] Further, the first probe includes a first tube body, a circuit board plug electrically connected to the circuit board for plugging into the probe plug-in member, a protective sleeve provided inside the first tube body for protecting the circuit board, and a sensor plug-in member for plugging and connecting with the second probe.

[0015] Further, the first tube body is sleeved inside the through-tube, a threaded hole is provided on the side wall of the through-tube, and the first probe and the through-tube are fixedly connected by bolts.

[0016] Further, the second probe includes a second tube body, a sensor plug provided inside the second tube body for plugging the sensor plug-in member, and the sensor plug is electrically connected to the gas sensor.

[0017] Furthermore, the second probe further includes a metal cover disposed at the end for collecting the detection gas, and a metal mesh disposed within the metal cover for isolating the outside from the gas sensor. The metal cover is provided with ventilation holes.

[0018] In summary, the utility model has the following beneficial technical effects:

[0019] 1. A plug-and-play fixed gas detector proposed by the utility model is convenient for installation and maintenance. The detector adopts a plug-and-play structure. The installation and replacement of the probe do not require complex steps. Through the design of the probe plug-in and the plug, the detector only needs to be inserted into the jack, which greatly simplifies the installation process and reduces the dependence on tools. At the same time, when the sensor needs to be replaced, the plug-and-play operation can be conveniently carried out. In addition, for the situation of abnormal display screen, the display board can also be repaired by plugging and unplugging, which is convenient and fast.

[0020] 2. A plug-and-play fixed gas detector proposed by the utility model does not require power-off for the plug-and-play operation of the probe, so it will not affect the normal operation of the entire monitoring system. It is also equipped with a self-locking switch for controlling the power-on and power-off of the main control board, which improves the safety of the device. At the same time, even when replacing the display screen by plugging and unplugging, the system does not need to be powered off. Especially when there are multiple detectors forming a network at the user site, it avoids the difficulty of powering off a single detector, ensuring the stability and continuity of the monitoring system.

[0021] 3. A plug-and-play fixed gas detector proposed by the utility model is simple and convenient for calibration and parameter operation. The calibration and parameter operation of the detector do not need to be carried out on-site. The staff does not need to calibrate each instrument one by one with a standard gas cylinder, but can centrally calibrate and adjust the parameters of the first probe and the second probe in the laboratory. The main control board only functions for data transmission and data display, weakening the processing function of the main control board. The function of detecting and processing sensing data is concentrated in the probe of the detector. Through the split design of the signal processing circuit, the calibrated probe can be directly plugged and used, avoiding the difficulty of on-site operation in harsh environments.

[0022] 4. A plug-and-play fixed gas detector proposed by the utility model has a function expansion function. Through the expansion plug-in of the external spiral thread through-hole tube, devices such as a light alarm can be conveniently externally connected, realizing function expansion and flexible configuration, meeting the requirements of different scenarios. At the same time, the plug-and-play connection of the first probe and the second probe, as well as the design of related protective sleeves, metal covers and metal meshes, effectively protect the sensor and the circuit board, improving the durability of the detector. Description of the Drawings

[0023] Figure 1It is a three-dimensional structure schematic diagram of a pluggable fixed gas detector according to an embodiment of the present invention.

[0024] Figure 2 It is an exploded view of a pluggable fixed gas detector according to an embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the first tube body according to an embodiment of the present invention.

[0026] Figure 4 It is a schematic diagram of the structure of the self-locking switch according to an embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of the structure of the light alarm according to an embodiment of the present invention.

[0028] Among them, 1. housing; 101. front cover; 102. front sealing ring; 103. central axis; 104. rear cover; 105. rear sealing ring; 106. perspective window; 1031. through pipe; 1032. probe plug-in part; 1033. external thread through-hole pipe; 1034. extended plug-in part; 1035. plug; 1036. light alarm; 1037. connecting part; 2. main control board; 201. display board; 202. support board; 3. detector; 301. first probe; 3011. first tube body; 3012. circuit board plug; 3013. circuit board; 3014. protective sleeve; 3015. sensor plug-in part; 3016. threaded hole; 3017. bolt; 302. second probe; 3021. second tube body; 3022. sensor plug; 3023. metal cover; 3024. metal mesh; 4. self-locking switch; 401. button; 402. limit groove; 403. hook; 404. spring; 405. first terminal; 406. second terminal; 407. third terminal; 408. moving terminal; 409. moving block. Specific embodiments

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Embodiment 1

[0031] Referring to Figure 1 , a pluggable fixed gas detector according to this embodiment includes:

[0032] A pluggable fixed gas detector, comprising a housing 1, a main control board 2 disposed in the housing 1 for processing and transmitting electrical signals, a hole provided in the housing 1, a probe plug-in member 1032 that fits into the hole and is electrically connected to the main control board 2, the probe plug-in member 1032 being provided with a jack on the outer side of the hole facing outward, and a detector 3 inserted into the jack for detecting gas. The detector 3 includes a first probe 301 equipped with a circuit board 3013 for processing electrical signals of a gas sensor, and a second probe 302 inserted under the first probe 301 and equipped with a gas sensor adapted to the circuit board 3013.

[0033] During operation, when the gas sensor in the second probe 302 detects abnormal gas, causing a change in the current in the circuit, the circuit board 3013 in the first probe 301 recognizes the change in current and generates an electrical signal to be sent to the main control board 2 for processing, for data display and data transmission. When detecting different gases, the first probe 301 and the second probe 302 can be replaced separately. The first probe 301 and the second probe 302 are used in combination. The first probe 301 is configured with a circuit board 3013 for a gas sensor that is only adapted to the second probe 302, and the main control board 2 functions to process, display, and transmit data.

[0034] The housing 1 includes a front cover 101, a front sealing ring 102 provided in the front cover 101, a central shaft 103 threadedly connected to the front cover 101, a rear cover 104 threadedly connected to the central shaft 103 and disposed behind the central shaft 103, and a rear sealing ring 105 provided in the rear cover 104. The front cover 101 includes a perspective window 106 provided with a glass cover. The central shaft 103 includes an externally threaded through-hole tube 1033 provided on the side wall and a through-tube 1031 provided on the lower side of the central shaft 103. Among them, the probe plug-in member 1032 is fixedly installed in the through-tube 1031. The sealing ring can block the entry of water vapor and detection gas, affecting the detection accuracy.

[0035] A support plate 202 is fixedly installed in the central shaft 103. The main control board 2 is disposed in the support plate 202. A display board 201 for displaying detection results is inserted into the support plate 202, and the back of the display board 201 is connected to the main control board 2 through a wire.

[0036] An expansion plug-in member 1034 is provided in the externally threaded through-hole tube 1033. The expansion plug-in member 1034 is electrically connected to the main control board 2. The externally threaded through-hole tube 1033 is detachably screwed with a plug 1035 for closing the hole tube.

[0037] When there is no need to externally connect other devices, the externally threaded through-hole tube is blocked with the plug 1035, and the expansion plug-in member 1034 realizes the expansion function.

[0038] A self-locking switch 4 for controlling the power on and off of the main control board 2 is provided inside the probe plug-in part 1032, and a relay controlled by the self-locking switch 4 is provided on the main control board 2.

[0039] The self-locking switch 4 includes a key 401, a moving block fixed to and below the key 401, a spring 404 and a catch 403 below the moving block. One end of the catch 403 is connected to the spring 404, and the other end is placed in the limit groove 402. The limit groove 402 is set to a specific shape so that when the key 401 is pressed, the catch 403 can be placed at different positions in the limit groove 402 under the force of the spring 404, realizing the up and down movement of the moving block. The moving terminals 408 are fixed on both sides of the moving block and move up and down with the movement of the moving block. First terminals 405, second terminals 406 and third terminals 407 are provided on both sides of the moving block. The third terminal 407 is powered on, and the first terminal 405 and the second terminal 406 are both grounded. When the key 401 bounces back and the moving terminals 408 contact the first terminal 405 and the second terminal 406, it is in a power-off state. When the key 401 is pressed again, the catch 403 is placed in the lower slot, the key 401 is locked, and the moving three contacts the first terminal 405 and the third terminal 407, being in a conductive state. By controlling the relay on the main control board 2 in the conductive control shaft 103, the power on and off of the entire device are realized.

[0040] Since the plugging and unplugging operation of the probe does not require power-off, it will not affect the normal operation of the entire monitoring system. A self-locking switch 4 for controlling the power on and off of the main control board 2 is also provided, improving the safety of the device. At the same time, even when replacing the display screen by plugging, the system does not need to be powered off. Especially in the case where there are multiple detectors 3 forming a network at the user site, it avoids the difficulty of powering off a single detector 3, ensuring the stability and continuity of the monitoring system.

[0041] The first probe 301 includes a first tube body 3011, a circuit board 3013 plug 3012 electrically connected to the circuit board 3013 for plugging into the probe plug-in part 1032, a protective sleeve 3014 provided in the first tube body 3011 for protecting the circuit board 3013, and a sensor plug-in part 3015 for plugging and unplugging connection with the second probe 302.

[0042] The first tube body 3011 is sleeved in the through tube 1031, a threaded hole 3016 is provided on the side wall of the through tube 1031, and the first probe 301 and the through tube 1031 are tightly connected by a bolt 3017.

[0043] The second probe 302 includes a second tube body 3021, a sensor plug 3022 provided in the second tube body 3021 for plugging the sensor plug-in part 3015, and the sensor plug 3022 is electrically connected to a gas sensor.

[0044] The second probe 302 further includes a metal cover 3023 disposed at the end for collecting the detection gas, and a metal mesh 3024 disposed within the metal cover 3023 for isolating the outside from the gas sensor. The metal cover 3023 is provided with ventilation holes. The pluggable connection of the first probe 301 and the second probe 302, as well as the designs of related protective sleeves 3014, metal covers 3023, and metal meshes 3024, effectively protect the sensor and the circuit board 3013, and improve the durability of the detector 3.

[0045] A pluggable fixed gas detector proposed in this embodiment is convenient for installation and maintenance. The detector 3 adopts a pluggable structure. The installation and replacement of the probe do not require complex steps. By means of the probe plug-in member 1032 and the plug design, the detector 3 can be simply inserted into the jack, greatly simplifying the installation process and reducing the dependence on tools. At the same time, when the sensor needs to be replaced, the plugging and unplugging operation can be conveniently carried out. In addition, for the situation of abnormal display screen, the display board 201 can also be plugged and unplugged for repair, which is convenient and fast.

[0046] When calibration is required, only the combination of the first probe 301 and the second probe 302 needs to be calibrated, without the need to perform it on-site. The first probe 301 and the second probe 302 are centrally calibrated and parameter-adjusted in the laboratory. The main control board 2 only has functions of data transmission and data display for the user, weakening the processing function of the main control board 2. The function of detecting and processing sensing data is concentrated in the probe of the detector 3. The calibrated probe can be directly plugged in and used, avoiding the difficulty of on-site operation in harsh environments.

[0047] Embodiment 2

[0048] The difference between this embodiment and Embodiment 1 is that this embodiment provides a pluggable fixed gas detector.

[0049] The externally threaded through-hole tube is externally connected to a light alarm 1036. The light alarm 1036 includes an alarm lamp, an extension plug inserted into the externally threaded through-hole tube 1033, and a connecting member 1037 screwed onto the externally threaded through-hole tube.

[0050] Through the extension plug-in member 1034 of the externally threaded through-hole tube, devices such as a light alarm 1036 can be conveniently externally connected, realizing the expansion of functions and flexible configuration, and meeting the requirements of different scenarios.

[0051] The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A pluggable fixed gas detector, characterized in that, It includes a housing (1), a main control board (2) disposed within the housing (1) for processing and transmitting electrical signals, a hole provided in the housing (1), a probe plug-in member (1032) that mates with the hole and is electrically connected to the main control board (2). The probe plug-in member (1032) is provided with a jack on the outer-facing side of the hole, and a detector (3) plugged into the jack for detecting gas. The detector (3) includes a first probe (301) containing a circuit board (3013) for processing electrical signals of the gas sensor, and a second probe (302) plugged under the first probe (301) and containing a gas sensor adapted to the circuit board (3013).

2. The pluggable fixed gas detector according to claim 1, characterized in that The housing (1) includes a front cover (101), a front sealing ring (102) disposed within the front cover (101), a central shaft (103) threadedly connected to the front cover (101), a rear cover (104) threadedly connected to the central shaft (103) and disposed behind the central shaft (103), and a rear sealing ring (105) disposed within the rear cover (104). The front cover (101) includes a perspective window (106) provided with a glass cover. The central shaft (103) includes an externally threaded through-hole tube (1033) provided on the side wall, and a through-tube (1031) provided on the lower side of the central shaft (103). Among them, the probe plug-in member (1032) is fixedly installed within the through-tube (1031).

3. The pluggable fixed gas detector according to claim 2, characterized in that, A support plate (202) is fixedly installed within the central shaft (103), the main control board (2) is disposed within the support plate (202), a display board (201) for displaying detection results is plugged into the support plate (202), and the back surface of the display board (201) is connected to the main control board (2) through a wire.

4. The plug-in type fixed gas detector according to claim 2, characterized in that, An expansion plug-in member (1034) is provided within the externally threaded through-hole tube (1033), the expansion plug-in member (1034) is electrically connected to the main control board (2), and a plug (1035) for closing the hole tube is detachably screwed onto the externally threaded through-hole tube (1033).

5. The plug-in type fixed gas detector according to claim 2, wherein, The externally threaded through-hole tube (1033) is externally connected to a light alarm (1036). The light alarm (1036) includes an alarm lamp, an expansion plug plugged into the externally threaded through-hole tube (1033), and a connector (1037) screwed onto the externally threaded through-hole tube (1033).

6. The plug-in type fixed gas detector according to claim 1, characterized in that A self-locking switch (4) for controlling the power on and off of the main control board (2) is provided within the probe plug-in member (1032), and a relay controlled by the self-locking switch (4) is provided on the main control board (2).

7. The pluggable fixed gas detector according to claim 2, characterized in that, The first probe (301) includes a first tube body (3011), a circuit board (3013) plug (3012) electrically connected to the circuit board (3013) for plugging into the probe plug-in member (1032), a protective sleeve (3014) provided within the first tube body (3011) for protecting the circuit board (3013), and a sensor plug-in member (3015) for plugging and unplugging with the second probe (302).

8. The pluggable fixed gas detector according to claim 7, characterized in that, The first pipe body (3011) is sleeved inside the through pipe (1031). A threaded hole (3016) is formed in the side wall of the through pipe (1031). The first probe (301) and the through pipe (1031) are fixedly connected by a bolt (3017).

9. The plug-in type fixed gas detector according to claim 7, wherein, The second probe (302) includes a second pipe body (3021) and a sensor plug (3022) disposed inside the second pipe body (3021) for plugging in a sensor plug-in unit (3015). The sensor plug (3022) is electrically connected to a gas sensor.

10. The plug-in type fixed gas detector according to claim 9, characterized in that, The second probe (302) further includes a metal cover body (3023) disposed at the end for collecting the detected gas, and a metal mesh (3024) disposed inside the metal cover body (3023) for isolating the outside from the gas sensor. The metal cover body (3023) is provided with ventilation holes.

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