CN210015038U

CN210015038U - Gas detector with open path

Info

Publication number: CN210015038U
Application number: CN201920645193.4U
Authority: CN
Inventors: 王鹤桥; 黄荣
Original assignee: HANGZHOU SAFEEX TECHNOLOGY Co Ltd
Current assignee: HANGZHOU SAFEEX TECHNOLOGY Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2020-02-04
Anticipated expiration: 2029-05-07

Abstract

The utility model discloses a gas detector in open route, including the base, one side fixed mounting on base top has explosion-proof shell, and the cavity has been seted up to explosion-proof shell's inside, and the inside fixed mounting of cavity has the circuit board, and one side fixed mounting of explosion-proof shell has laser emission receiver, and laser emission receiver and circuit board electric connection, one side on base top is seted up flutedly, and the both sides cell wall of two recesses alternates through inlaying the bearing of establishing and is connected with the threaded rod. The utility model relates to a gas detector on open route adopts the mode of laser reflection, because the light beam and the facula of laser have certain diameter, so when the reflecting plate was hit to the laser beam, both made the reflecting plate uneven, with the help of diffuse reflection's effect, also had some laser reflection and return receiving probe, and then realized the reflection and the receipt of butt joint light beam, compare traditional way, this scheme need not the transmission and receives and adjust well, and is lower to the requirement of construction, installation, can guarantee data reliability and accuracy simultaneously.

Description

Gas detector with open path

Technical Field

The utility model relates to a gas detector, in particular to gas detector in open route.

Background

At present, as is well known, a point-type gas detector, a semiconductor sensor using a semiconductor detection principle, a catalytic combustion gas sensor (also called a black-and-white element), an electrochemical sensor using an electrochemical detection principle, an infrared gas sensor using an infrared detection principle, and an ultraviolet sensor using an ultraviolet detection principle are commonly used for detecting combustible gas or toxic gas. The above products are characterized by passive detection, i.e. they are detected only when the gas to be detected reaches the sensor and comes into contact with it due to diffusion. Few linear infrared correlation methods are used to detect combustible or toxic gases, and so far none of the national standards exist. The principle is as follows: an infrared transmitter and an infrared receiver are arranged, the infrared ray emitted to the receiving linear light path is attenuated by the absorption energy of the gas to be detected, and the degree of attenuation of the infrared ray energy is used for determining the existence of the gas to be detected in the light path. The main disadvantages are: 1. the infrared spectrum used is wide and is easily influenced by other interference gases; 2. infrared light is greatly attenuated in air, so that the detection distance is limited to a certain extent; 3. point-to-point transmission to reception, and the transmission and the receiver are easy to cause difficult reception due to vibration and the like; 4. the infrared emitting device is attenuated after being used for a long time, so that the sensitivity is reduced, the maintenance period is shortened, and the service life of the product is prolonged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gas detector on open route to current gas detector who proposes in solving above-mentioned background art is when using, and the infrared spectrum broad receives other interference gas influences easily, and the infrared light decay is great in the air, and measuring distance receives certain restriction, and is point-to-point by launching to receiving, and transmission and receiver cause the problem of receiving the difficulty easily because reasons such as vibration.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an open path's gas detector, includes the base, one side fixed mounting on base top has explosion-proof shell, the cavity has been seted up to explosion-proof shell's inside, the inside fixed mounting of cavity has the circuit board, one side fixed mounting of explosion-proof shell has laser emission receiver, laser emission receiver and circuit board electric connection, one side on base top is seted up flutedly, two the bearing interlude of establishing through inlaying of the both sides cell wall of recess is connected with the threaded rod, the one end of threaded rod is connected with step motor's output shaft rotation, step motor fixed mounting is in one side of recess, the screw hole threaded connection that the surface of threaded rod and slider middle part were seted up, the top fixed mounting of slider has the laser reflector.

As a preferred technical scheme of the utility model, the equal fixed mounting in both sides of base has the installation piece, two the surperficial threaded connection of installation piece has fastening bolt.

As an optimized technical scheme of the utility model, laser emission receiver's surface cover is equipped with fire prevention explosion-proof cover.

As an optimized technical scheme of the utility model, laser reflecting plate is adjusted well with laser emission receiver's position.

As an optimal technical scheme of the utility model, one side fixed mounting of base has laser emission receiver control switch and step motor control switch, laser emission receiver and step motor are respectively through laser emission receiver control switch and step motor control switch and base internally mounted's battery electric connection.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the laser reflection mode is adopted, and because the laser beam and the laser spot have certain diameters, when the laser beam strikes the reflecting plate, the reflecting plate is uneven, and some laser is reflected back to the receiving probe under the action of diffuse reflection, so that the reflection and the receiving of the butt-jointed light beam are realized;

2. the step motor drives the threaded rod to rotate through installation, and the threaded rod rotates to drive the sliding block to move in a reciprocating mode, so that the distance between the laser reflecting plate and the laser emitting receiver can be adjusted conveniently, and the strength of the light beam can be changed.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a base; 2. an explosion-proof housing; 3. a cavity; 4. a circuit board; 5. a laser transmitter-receiver; 6. a fire and explosion protection cover; 7. a groove; 8. a threaded rod; 9. a stepping motor; 10. a slider; 11. a laser reflecting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1, the utility model provides a gas detector in open route, including base 1, one side fixed mounting on base 1 top has explosion-proof shell 2, cavity 3 has been seted up to explosion-proof shell 2's inside, the inside fixed mounting of cavity 3 has circuit board 4, one side fixed mounting of explosion-proof shell 2 has laser emission receiver 5, laser emission receiver 5 and circuit board 4 electric connection, one side on base 1 top is seted up flutedly 7, the both sides cell wall of two recesses 7 alternates through the bearing of inlaying and is connected with threaded rod 8, the one end of threaded rod 8 is connected with step motor 9's output shaft rotation, step motor 9 fixed mounting is in one side of recess 7, the screw hole threaded connection of seting up at the surface of threaded rod 8 and slider 10 middle part, the top fixed mounting of slider 10 has laser reflecting plate 11.

Preferably, the two sides of the base 1 are fixedly provided with mounting blocks, the surface of each of the two mounting blocks is in threaded connection with a fastening bolt, and the base 1 can be conveniently mounted through the mounted fastening bolts.

Preferably, the surface of the laser transmitter-receiver 5 is covered with a fireproof and explosion-proof cover 6, and the laser transmitter-receiver 5 is effectively protected by the covered fireproof and explosion-proof cover 6.

Preferably, the laser reflection plate 11 is aligned with the laser transmitter-receiver 5, and the laser reflected by the laser transmitter-receiver 5 is ensured by the alignment of the laser reflection plate 11 with the laser transmitter-receiver 5.

Preferably, a laser transmitter receiver control switch and a stepping motor control switch are fixedly mounted on one side of the base 1, and the laser transmitter receiver 5 and the stepping motor 9 are electrically connected with a storage battery mounted inside the base 1 through the laser transmitter receiver control switch and the stepping motor control switch respectively.

When in use, the utility model relates to a gas detector of open route, when using this gas detector, at first laser emission receiver 5 comprises laser emitter and laser receiver, open the model through taking over transmitter control switch and be "HB-3D 65-CE 060-013" laser emitter, through laser emitter 5 transmission laser, open step motor 9 through step motor control switch after that, rotate through step motor 9 and drive threaded rod 8 and rotate, rotate through threaded rod 8 and drive slider 10 at threaded rod 8 surface reciprocating motion, thereby adjust the distance between laser reflecting plate 11 and laser emission receiver 5, laser emission receiver 5 sends a bundle of laser to laser reflecting plate 11, when getting back to the model through the reflection and being "CHQ 003 0038Z" laser receiver, because its laser intensity can attenuate after the laser that is absorbed by the gas under test in the air, the integrated concentration value of the concentration of the gas to be detected along the light path can be detected through the attenuation degree of the processing and analyzing unit arranged on the surface of the circuit board 4 to the laser intensity, the value can be divided by the distance traveled by the laser to obtain the average concentration value of the gas to be detected, different laser gas detectors can be obtained by changing the frequency of the laser emitted by the laser emitting and receiving device 5, the laser emitted by the laser emitting and receiving device 5 is a single-spectrum light beam and has no effect on any gas except the gas to be detected; therefore, the gas selectivity and the anti-interference capability of the laser gas detector are improved, and the anti-humidity interference capability is improved due to the fact that the absorption frequency of the detected gas is far away from the absorption frequency of water molecules, so that the product can be applied to the humid environments such as underground coal mines or urban pipe corridors; in addition, the propagation attenuation of the laser beam in the air is small, so that the measuring distance can be well improved, and the advantage is more prominent when the laser beam is particularly used in a pipeline gathering and transportation system; the maximum measuring distance can reach hundreds of meters.

In the description of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The gas detector with the open path comprises a base (1) and is characterized in that an explosion-proof shell (2) is fixedly mounted on one side of the top end of the base (1), a cavity (3) is formed in the explosion-proof shell (2), a circuit board (4) is fixedly mounted in the cavity (3), a laser transmitter-receiver (5) is fixedly mounted on one side of the explosion-proof shell (2), the laser transmitter-receiver (5) is electrically connected with the circuit board (4), a groove (7) is formed in one side of the top end of the base (1), threaded rods (8) are connected with the groove walls on the two sides of the two grooves (7) in an inserting and penetrating mode through embedded bearings, one end of each threaded rod (8) is rotatably connected with an output shaft of a stepping motor (9), the stepping motor (9) is fixedly mounted on one side of the groove (7), and the surface of each threaded rod (8) is in threaded connection with a threaded hole formed in, and a laser reflecting plate (11) is fixedly arranged at the top end of the sliding block (10).

2. An open path gas sensor according to claim 1, wherein: the mounting block is fixedly mounted on each of two sides of the base (1), and fastening bolts are connected to the surface of the mounting blocks in a threaded mode.

3. An open path gas sensor according to claim 1, wherein: and the surface of the laser transmitting receiver (5) is covered with a fireproof and explosion-proof cover (6).

4. An open path gas sensor according to claim 1, wherein: the laser reflecting plate (11) is aligned with the laser emitting receiver (5).

5. An open path gas sensor according to claim 1, wherein: one side fixed mounting of base (1) has laser transceiver control switch and step motor control switch, laser transceiver (5) and step motor (9) are respectively through laser transceiver control switch and step motor control switch and base (1) internally mounted's battery electric connection.