CN220207508U

CN220207508U - Adjustable gas detector

Info

Publication number: CN220207508U
Application number: CN202321557851.7U
Authority: CN
Inventors: 郝玉国; 史维国; 朱昭; 周围; 周广贺; 吴思远
Original assignee: Suzhou Industrial Park Taizhi Measurement And Control Technology Co ltd
Current assignee: Suzhou Industrial Park Taizhi Measurement And Control Technology Co ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-12-19
Anticipated expiration: 2033-06-19

Abstract

The utility model provides an adjustable gas detector. The adjustable gas detector comprises a shell, a main control board and a gas sensor; the main control board is arranged in the shell, the gas sensor is electrically connected with the main control board, and the induction end is arranged on the upper surface of the shell. The upper surface of the shell is detachably connected with a pumping type air marking cover, the pumping type air marking cover is arranged on the outer surface of the sensing end of the gas sensor, and the air inlet end of the pumping type air marking cover is connected with an air guide piece; the air guide piece is formed by splicing an air guide pipe and an air guide cap, and the air guide pipe and the air guide cap are connected into a whole or the air guide cap is independently connected with the air inlet end of the pumping type air marking cover to change different air suction states. The utility model can meet the use of different spaces of the gas detector through the detachable recombination of the gas guide, and solves the problem that the long-distance adjustment of the existing sampling port is limited in use place.

Description

Adjustable gas detector

Technical Field

The utility model relates to the technical field of gas detectors, in particular to an adjustable gas detector.

Background

Gas detection is a very necessary task for safety protection, and it can perform gas detection in the corresponding space, so as to ensure the safety of the space. The gas detector used is different from application scene to application scene. For example, portable and stationary types are classified according to the manner of use. According to the sampling mode, the method is divided into a diffusion type and a pumping type. The pumping type gas detector has the characteristics of high detection speed, long-distance measurement on dangerous areas (high-concentration ozone areas) and safety maintenance on site operators. Is suitable for the places where the gas detector cannot be placed and places with special requirements on reaction speed, pressure difference and the like.

The sampling port of the existing most pump type gas detectors is fixed and cannot be adjusted according to the change of the area. There are also pumping type gas detectors that can perform sampling port adjustment according to a change in area, but the structure thereof is complicated, length adjustment is performed through a telescopic structure, and adjustment distance is limited. Because the small change of the sampling port length has little influence on the detection result, a long-distance change is needed to obtain the required detection effect, but the sampling port capable of being changed in a long distance has a complex structure and is not easy to recover to the normal port sampling length, the detection speed is influenced by the extension of the sampling port, and the use of the sampling port under certain space is limited.

Disclosure of Invention

Based on the above, it is necessary to provide an adjustable gas detector for solving the problem that the sampling port of the existing pumping gas detector is adjusted for a long distance to limit the use space.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

an adjustable gas detector comprises a shell, a main control board and a gas sensor; the main control board is arranged in the shell, the gas sensor is electrically connected with the main control board, and the induction end is arranged on the upper surface of the shell.

The upper surface of the shell is detachably connected with a pumping type air marking cover, the pumping type air marking cover is arranged on the outer surface of the sensing end of the gas sensor, and the air inlet end of the pumping type air marking cover is connected with an air guide piece; the air guide piece is formed by splicing an air guide pipe and an air guide cap, and the air guide pipe and the air guide cap are connected into a whole or the air guide cap is independently connected with the air inlet end of the pumping type air marking cover to change different air suction states.

Further, the air duct comprises a first internal thread sleeve, a telescopic hose and a first external thread sleeve which are sequentially connected from top to bottom; the first internal thread sleeve is in threaded connection with the air guide cap, and the first external thread sleeve is in threaded connection with the air inlet end of the pumping type air marking cover.

Further, the side wall of the pumping type air marking cover is fixedly provided with a plurality of first clamping blocks which are distributed in an annular mode and used for fixing the telescopic hose.

Further, the first clamping block is U-shaped, the inner end wall of the opening of the first clamping block is inclined to the arc-shaped inner wall from outside to inside, a plurality of bulges are fixedly connected to the arc-shaped inner wall along the radial direction of the arc-shaped inner wall, and the bulges are matched with the surface gaps of the telescopic hose.

Further, the air duct comprises a second internal thread sleeve, a steel pipe and a second external thread sleeve which are sequentially connected from top to bottom; the second internal thread sleeve is in threaded connection with the air guide cap, and the second external thread sleeve is in threaded connection with the air inlet end of the pumping type air marking cover.

Further, a plurality of second clamping blocks which are linearly distributed and used for fixing the steel pipes are fixedly arranged on the lower surface of the shell.

Further, the air duct comprises a flexible pipe and a rigid pipe, wherein two ends of one of the flexible pipe and the rigid pipe are respectively connected with the air inlet ends of the air guide cap and the pumping type air marking cover, and the other air guide pipe is clamped on the machine shell.

Further, a back clip is arranged in the middle of the lower surface of the shell along the length direction of the lower surface of the shell, and mini clips are arranged at the top of the lower surface of the shell and positioned at two sides of the back clip.

Further, a flashlight is arranged on the upper surface of the shell and is electrically connected with the main control board.

Further, the casing comprises an upper cover and a lower cover, the upper cover and the lower cover are spliced into a whole, and a pressing strip is arranged at a splicing gap of the upper cover and the lower cover for sealing.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the gas guide piece formed by splicing the gas guide pipe and the gas guide cap is used for conducting gas guide to match with a region needing a certain distance from a detection region for detection, and the gas guide cap is used for conducting gas guide to match with region detection needing rapid detection, so that the detachable recombination of the gas guide piece can meet the use of different spaces of a gas detector, and the problem that the long-distance adjustment of the existing sampling port is limited in use place is solved;

2. the utility model can adopt the air duct with the telescopic hose to meet the sampling operation of gases with different angles, can adopt the air duct with the steel pipe to meet the sampling operation of gases with fixed angles, and different sampling pipes meet different use requirements, thereby expanding the use place of the gas detector.

Drawings

The disclosure of the present utility model is described with reference to the accompanying drawings. It should be understood that the drawings are for purposes of illustration only and are not intended to limit the scope of the present utility model in which like reference numerals are used to designate like parts. Wherein:

FIG. 1 is an external view of an adjustable gas detector according to embodiment 1 of the present utility model;

FIG. 2 is a schematic diagram of connection of the housing clamping air guide member based on FIG. 1;

FIG. 3 is a schematic diagram of the connection of the pumping type air labeling hood and the air guide based on FIG. 2;

FIG. 4 is a schematic view of a structure of the air guide based on FIG. 2;

FIG. 5 is a schematic view of a structure of the first latch according to FIG. 2;

FIG. 6 is a schematic diagram of an adjustable gas detector according to embodiment 2 of the present utility model;

FIG. 7 is a schematic diagram of the connection of the pumping type air labeling hood and the air guide based on FIG. 6;

FIG. 8 is a schematic diagram of an adjustable gas detector according to embodiment 3 of the present utility model;

FIG. 9 is a schematic circuit diagram of one of the signal processing units according to the present utility model;

fig. 10 is a schematic circuit diagram of another signal processing unit according to the present utility model.

The reference numerals in the drawings indicate: 1. a housing; 11. an upper cover; 12. a lower cover; 2. a pumping type air marking cover; 3. an air duct; 311. a first female threaded sleeve; 312. a flexible hose; 313. a first external thread sleeve; 314. a first clamping block; 321. a second female threaded sleeve; 322. a steel pipe; 323. a second external thread sleeve; 324. a second clamping block; 4. an air guide cap; 5. a back clip; 6. a mini clamp; 7. a flashlight.

Detailed Description

It is to be understood that, according to the technical solution of the present utility model, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present utility model. Accordingly, the following detailed description and drawings are merely illustrative of the utility model and are not intended to be exhaustive or to limit the utility model to the precise form disclosed.

Example 1

Referring to fig. 1, the embodiment describes an adjustable gas detector, which includes an instrument body composed of a casing 1, a main control board, a gas sensor, and the like. The shell 1 is formed by splicing an upper cover 11 and a lower cover 12, and a joint gap between the upper cover and the lower cover is provided with a pressing strip seal. Instead of using only one gas sensor, a plurality of gas sensors of different specifications may be used to detect different gases. For example, a catalytic combustion type sensor and an electrode sensor may be used to detect the combustible gas and the toxic gas, respectively, and other types of gas sensors may be used to detect the corresponding gases.

The main control board can select STM32 chip, contains the charging circuit that is used for supplying power, is used for acquireing the clock circuit of current time, is used for driving the air pump drive circuit of air pump etc.. The signal processing unit for converting the detection signal of the gas sensor into an electric signal and the ADC unit for carrying out analog-to-digital conversion can be soldered on the main control board. The signal processing unit may be selected as shown in fig. 9 or 10, or may be selected as other circuit configurations as long as the signal conversion function required for the gas sensor is satisfied. The ADC unit adopts the existing ADC chip, and is directly soldered or connected by a wire because of being an independent circuit.

The specific connection of the signal processing unit shown in fig. 9 is as follows: the non-inverting input end and the inverting input end of the U8 are respectively connected with R90 and R91 in series and serve as the positive input end and the negative input end of the signal processing unit to be connected with R89, the non-inverting input end of the U8 is grounded through R88, and R92 is connected between the inverting input end and the output end of the U8 in series; the power supply end of U8 is connected with a 5V power supply, the ground is connected with the ground, the output end is connected in series with R93 and C50 and then is grounded, and the joint of R93 and C50 is used as the output end of the signal processing unit and is connected with the ADC unit.

The specific connection of the signal processing unit shown in fig. 10 is as follows: the non-inverting input end and the inverting input end of the U9 are respectively connected in series with R95 and R94 and serve as an anode input end and a cathode input end of the signal processing unit, C51 is connected between the inverting input end and the output end of the U9 in series, and R97 and R98 are connected in parallel and then connected in series with R97 and connected in parallel with C51; the power supply end of U9 is connected with 3V2 power supply, the ground is connected with ground, and the output end is connected with R99 and C52 in series and is connected with the ADC unit as the output end of the signal processing unit.

In addition, a display, keys, and a LOGO light, flashlight 7, etc. may be provided. The display screen adopts an LCD display screen for displaying the current value, the middle position of the key can be set to be an SOS key, and the SOS key is only required to be pressed down, so that the device can automatically and connected peripheral equipment, background mobile phone APP and a computer client prompt alarm are adopted to inform operation site guardianship personnel and site commander of immediately supporting the operation site guardianship equipment. The 4G and 433MHz networking mode is matched with the 4G module and the 433MHz networking module, and the independent circuit modules can be welded on the main control board in a centralized way. The LOGO lamp automatically changes state along with the working state of the instrument so as to distinguish whether the instrument is in a charging state, a bright screen working state or an alarm state. The flashlight 7 can be arranged to ensure operation in a closed space, and no fear of darkness exists.

Meanwhile, a GPS module can be arranged to position the current position information of the instrument in real time and report the current coordinates and longitude and latitude of an operator to the background so as to realize the remote management of the background. The microphone can be further arranged for sound collection, on-site sound signals are converted into electric signals and transmitted to the background mobile phone APP, so that the situation of the current operation site can be checked by the far end. The camera can also sample the field situation of the current working environment in real time, and the sampled data are converted into digital signals and transmitted to the background mobile phone APP, so that guardianship and commanders can know the current field environment in real time.

Therefore, the main control board is used as a processor to be electrically connected with other devices controlled by the main control board, and performs data processing and feedback on the corresponding modules so as to control the corresponding devices to work. For example, when the voltage output by the gas sensor exceeds the alarm threshold, the main control board reads the current gas concentration value in real time and displays the current gas concentration value on the current display screen in real time to perform corresponding alarm operation. The alarm can be sent remotely, or can be sent by sound and light, such as by a buzzer, by a warning lamp, etc.

Because the casing 1 is formed by splicing the upper cover 11 and the lower cover 12, the upper surface of the casing 1 is the upper cover 11, and the lower surface is the lower cover 12. The mounting positions of the respective components will be described directly with reference to the upper cover 11 and the lower cover 12. The main control board and the corresponding circuit module are arranged in the shell 1, the sensing end of the gas sensor is arranged on the upper cover 11, the miniature air pump can be arranged in the pumping type air marking cover 2 and electrically connected with the main control board, and the miniature air pump can also be directly arranged on the upper cover 11 for corresponding installation according to actual needs.

The pumping type air marking cover 2 is arranged on the outer surface of the sensing end of the gas sensor and is detachably connected with the upper cover 11. Can realize detachable connection through bolted connection's mode, also can realize detachable connection through the mode of joint. For example, a clamping sleeve is arranged around the sensing end of the upper cover 11 and positioned at the sensing end of the gas sensor, a convex block matched with the clamping sleeve is arranged on one side of the pumping type gas marking cover 2 connected with the upper cover 11, and the clamping connection of the pumping type gas marking cover 2 and the upper cover 11 realizes the detachable connection of the pumping type gas marking cover 2 and the upper cover 11. The detachable mode is adopted, so that follow-up maintenance and check operation can be conveniently performed, and a fault point can be quickly found.

The pumping type air marking cover 2 of the embodiment is preferably circular, an air inlet end is formed in the peripheral wall of the circular shape, and the air guide piece guides air into the pumping type air marking cover 2. The air guide piece and the air inlet end of the pumping type air marking cover 2 can be detachably connected in a clamping or screwing mode. The following is an example of a screw connection.

The outer surface of the air inlet end of the pumping type air marking cover 2 is provided with corresponding threads. Referring to fig. 2, the air guide member includes an air guide pipe 3 and an air guide cap 4, wherein an inner wall of the air guide cap 4 is provided with an internal thread connected with an air inlet end, two ends of the air guide pipe 3 can be respectively connected with the air guide cap 4 and the pumping type air marking cover 2, the pumping type air marking cover 2 and the air guide cap 4 can be connected through the air guide pipe 3, and the air guide cap 4 can also be directly connected with the air inlet end of the pumping type air marking cover 2 in a threaded manner. If a certain distance between the instrument and the detection space is needed, the pumping type air marking cover 2 and the air guiding cap 4 are connected by adopting the air guiding tube 3, and if a detection result is needed to be rapidly obtained, the air guiding cap 4 is directly connected to the air inlet end of the pumping type air marking cover 2.

Referring to fig. 4, the air duct 3 includes a first female screw sleeve 311, a telescopic hose 312, and a first male screw sleeve 313 sequentially connected from top to bottom. The first internal thread sleeve 311 is in threaded connection with the air guide cap 4, and the first external thread sleeve 313 is in threaded connection with the air inlet end of the pumping type air marking cover 2. The pumping type air marking cover 2, the first internal thread sleeve 311, the telescopic hose 312, the first external thread sleeve 313 and the air guiding cap 4 are communicated. The flexible hose 312 can be changed not only in length by its own expansion and contraction, but also in angle by the nature of its own material. Therefore, the air duct 3 of this embodiment not only can change the length, but also can change the angle, so as to meet the gas detection requirements of different angles.

Referring to fig. 3 and 5, if the gas detector is required to quickly output a detection result, the gas guide tube 3 is not required to be used, the gas guide tube 3 can be installed on the pumping type gas marking cover 2 so as to be taken down when required, a plurality of first clamping blocks 314 which are annularly distributed and used for fixing the telescopic hose 312 are fixedly arranged on the side wall of the pumping type gas marking cover 2, the number of the first clamping blocks 314 is at least two, preferably three, and the first clamping blocks 314 can only be used for clamping and fixing the telescopic hose 312 because the inner diameters of the first internal thread sleeve 311 and the first external thread sleeve 313 are larger than the telescopic hose 312, and the first internal thread sleeve 311 and the first external thread sleeve 313 are positioned at two ends of the telescopic hose 312 and cannot enter the first clamping blocks 314.

The first clamping block 314 is U-shaped, and one side inner wall end with an opening is inclined from outside to inside, and the inner wall with the opening is an arc-shaped inner wall and is matched with the telescopic hose 312, so that the inner wall with the opening is formed by an outer inclined plane inner arc-shaped surface. The arcuate inner wall has a plurality of protrusions affixed radially thereto that match the surface apertures of the flexible hose 312. The protrusions can be made of flexible materials, and the inner wall surfaces of the openings can be bonded with flexible layers to be matched with the telescopic hose 312 to achieve clamping.

In order to facilitate hanging the gas detector on the clothes of the operator, a back clip 5 may be provided on the surface of the lower cover 12, and the gas detector may be clipped on the clothes pocket of the operator through the back clip 5. In addition, in order to further improve the stability of centre gripping, set up two miniature clamp 6 in the middle part of lower cover 12 and be located the both sides of back splint 5 pivoted position, also can the clothing pocket of centre gripping operating personnel, can stabilize the centre gripping with the gas detector on operating personnel's clothes through the cooperation of back splint 5 and miniature clamp 6 in rocking great environment.

The present embodiment can meet different requirements or detection requirements of different occasions by selecting the common cooperation of the air duct 3 with the telescopic hose 312 and the air duct cap 4 or selecting only the air duct cap 4.

Example 2

Referring to fig. 6 and 7, this embodiment describes an adjustable gas detector, which has substantially the same structure as the adjustable gas detector described in embodiment 1. The difference is that the structure of the air duct 3 of this embodiment includes a second female screw sleeve 321, a steel pipe 322 and a second male screw sleeve 323 which are sequentially connected from top to bottom. The second internal thread bush 321 is in threaded connection with the air guide cap 4, and the second external thread bush 323 is in threaded connection with the air inlet end of the pumping type air marking cover 2. The structures of the second internal thread sleeve 321 and the second external thread sleeve 323 can be the same as those of the first internal thread sleeve 311 and the first external thread sleeve 313, the steel pipe 322 has rigidity and is not easy to bend, and the space with a fixed angle can be acquired by adopting the steel pipe 322. The air duct 3 with the steel tube 322 can be removed by rapidly outputting the detection result, and only the air duct cap 4 is reserved.

In order to use the air duct 3 when necessary, a plurality of second clamping blocks 324 which are linearly distributed and are used for fixing the steel pipe 322 are arranged on the surface of the lower cover 12. The second clamping block 324 may have the same structure as the first clamping block 314 or may be different from the first clamping block as long as the steel pipe 322 can be fixed. Since the steel pipe 322 does not have flexibility, the second clamping blocks 324 need to be linearly distributed to fix the steel pipe 322, and the second internal thread sleeve 321 and the second external thread sleeve 323 cannot enter the second clamping blocks 324, but can play a limiting role, so that the second clamping blocks 324 are prevented from being separated from two ends of the steel pipe 322.

Example 3

Referring to fig. 8, this embodiment describes an adjustable gas detector, which has substantially the same structure as the adjustable gas detector described in embodiment 1. The difference is that the airway tube 3 of this embodiment is composed of a flexible tube and a rigid tube. The flexible tube has the same structure as the air duct 3 of embodiment 1, the rigid tube has the same structure as the air duct 3 of embodiment 2, and the same locking method as those of embodiment 1 and embodiment 2 can be adopted.

The embodiment not only can adapt to more scenes by replacing the air duct 3, but also can meet the detection environment of fixed angles and the environment of rapid detection results, and not only can the gas detection environment of angle switching be realized.

The technical scope of the present utility model is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present utility model, and these changes and modifications should be included in the scope of the present utility model.

Claims

1. An adjustable gas detector comprises a shell (1), a main control board and a gas sensor; the main control board is arranged in the shell (1), the gas sensor is electrically connected with the main control board, and the induction end is arranged on the upper surface of the shell (1); it is characterized in that the method comprises the steps of,

the upper surface of the shell (1) is detachably connected with a pumping type air marking cover (2), the pumping type air marking cover (2) is arranged on the outer surface of the sensing end of the gas sensor, and the air inlet end of the pumping type air marking cover (2) is connected with an air guide piece; the air guide piece is formed by splicing an air guide pipe (3) and an air guide cap (4), and the air guide pipe (3) and the air guide cap (4) are connected into a whole or the air guide cap (4) is independently connected with the air inlet end of the pumping type air marking cover (2) to change different air suction states.

2. The adjustable gas detector according to claim 1, wherein the gas guide tube (3) comprises a first internal thread sleeve (311), a telescopic hose (312) and a first external thread sleeve (313) which are sequentially connected from top to bottom; the first internal thread sleeve (311) is in threaded connection with the air guide cap (4), and the first external thread sleeve (313) is in threaded connection with the air inlet end of the pumping type air marking cover (2).

3. The adjustable gas detector as claimed in claim 2, wherein a plurality of first clamping blocks (314) which are distributed in a ring shape and used for fixing the telescopic hose (312) are fixedly arranged on the side wall of the pumping type gas marking cover (2).

4. An adjustable gas detector according to claim 3, characterized in that the first clamping block (314) is in a U shape, the inner end wall of the opening of the first clamping block is inclined to the arc-shaped inner wall from outside to inside, the arc-shaped inner wall is fixedly connected with a plurality of bulges along the radial direction of the arc-shaped inner wall, and the bulges are matched with the surface gaps of the telescopic hose (312).

5. The adjustable gas detector according to claim 1, wherein the gas guide tube (3) comprises a second internal thread sleeve (321), a steel tube (322) and a second external thread sleeve (323) which are sequentially connected from top to bottom; the second internal thread sleeve (321) is in threaded connection with the air guide cap (4), and the second external thread sleeve (323) is in threaded connection with the air inlet end of the pump suction type air marking cover (2).

6. The adjustable gas detector as claimed in claim 5, wherein a plurality of second clamping blocks (324) which are linearly distributed and are used for fixing the steel tube (322) are fixedly arranged on the lower surface of the casing (1).

7. The adjustable gas detector according to claim 1, wherein the gas guide tube (3) comprises a flexible tube and a rigid tube, two ends of one of the flexible tube and the rigid tube are respectively connected with the gas guide cap (4) and the gas inlet end of the pumping type gas marking cover (2), and the other of the flexible tube and the rigid tube is clamped on the machine shell (1).

8. The adjustable gas detector according to any one of claims 1 to 7, wherein a back clip (5) is installed in the middle of the lower surface of the casing (1) along the length direction of the lower surface, and mini clips (6) are installed on the top of the lower surface of the casing (1) and on two sides of the back clip (5).

9. The adjustable gas detector according to claim 1, wherein a flashlight (7) is mounted on the upper surface of the housing (1), and the flashlight (7) is electrically connected with the main control board.

10. The adjustable gas detector according to claim 1, wherein the casing (1) comprises an upper cover (11) and a lower cover (12), the upper cover (11) and the lower cover (12) are spliced into a whole, and a pressing strip seal is arranged at a splicing gap of the upper cover (11) and the lower cover.