Mining intrinsic safety type smoke sensor

Abstract

The utility model relates to the technical field of sensors, in particular to a mining intrinsic safety type smoke sensor, which comprises an inductor shell, a sealing element and a knob, an induction module can be mounted in the inductor shell, the inductor shell is provided with a mounting end and a smoke end, the mounting end can be mounted on mining mechanical equipment or a wall body, the smoke end is provided with an air hole, and the sealing element is arranged on the knob. External air can enter the shell along the air holes; the sealing piece is attached to the inner wall of the smoke end, and a communicating hole matched with the air hole is formed in the sealing piece; the knob is rotationally connected with the smoke end and extends into the sensor shell to be fixed with the sealing element; after the knob drives the sealing piece to rotate, the part, not provided with the communicating hole, of the sealing piece can seal the air hole. According to the utility model, the sealing element is driven to rotate through the knob, so that the sealing element opens and closes the air hole in the sensor shell, the corrosion of water vapor to the sensing module is prevented, and the problems that the conventional smoke sensor is easily affected with damp under special conditions, and certain loss is caused are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to an intrinsically safe smoke sensor for mining. Background Art

[0002] The mine intrinsically safe smoke sensor is an intrinsically safe electrical device for mine use. The sensor is suitable for workplaces such as underground coal mines, open-pit coal mines and coal preparation plants, and is used for smoke detection on belt conveyor belts.

[0003] Existing sensors are generally provided with a shell, a smoke probe and a circuit board. The smoke probe and the circuit board are generally installed in the shell, and a plurality of air holes are opened on the shell to allow smoke to enter the smoke chamber of the shell. When the smoke enters the smoke chamber of the shell, it is sensed by the smoke probe, and then the red light flashes, and at the same time the three-stage tube is controlled to be turned on and output a low level. The associated control box receives the smoke signal, the control box voice alarms, and at the same time the solenoid valve is started to start sprinkling water to achieve smoke protection or automatic fire extinguishing.

[0004] However, after the existing sensors are produced, they have certain storage requirements. They need to be stored in a well-ventilated warehouse, and the number of stacking layers should not be more than 5. There should be no corrosive gas or steam in the room. The operating temperature is 0℃~40℃, and the relative humidity is not more than 98% (25℃). The purpose is to prevent water vapor from entering the shell along the smoke chamber and corroding the smoke probe and the circuit board, thereby causing problems such as moisture causing short circuit of the circuit board. However, existing sensors often lack structures to prevent sensors from getting damp, resulting in some sensors still getting damp under special circumstances, causing certain losses. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies of the prior art, the utility model provides an intrinsically safe smoke sensor for mining, which can prevent water vapor from entering the shell and corroding the smoke probe and the circuit board, so as to solve the problem that some sensors in the prior art are easily affected by moisture, causing certain losses.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model provides a mining intrinsically safe smoke sensor, including: a sensor housing, a seal and a knob, wherein a sensing module can be installed in the sensor housing, the sensor housing has a mounting end and a smoke end, the mounting end can be installed on mining machinery or a wall, an air hole is provided on the smoke end, and the outside can enter the shell along the air hole; the seal fits the inner wall of the smoke end, and a connecting hole matched with the air hole is provided on it; the knob is rotatably connected to the smoke end, and extends into the sensor housing and is fixed to the seal; after the knob drives the seal to rotate, the part of the seal without the connecting hole can close the air hole.

[0009] Optionally, a dustproof net is fixed in the communicating hole.

[0010] Optionally, the sensor housing includes an upper shell and a lower shell, and the upper shell is threadedly connected to the lower shell.

[0011] Optionally, a lifting eye screw is threadedly connected to the upper shell.

[0012] Optionally, a display light is provided on the sensor housing, the display light is controlled by the sensing module, a lampshade is provided outside the display light, and the lampshade is fixed to the sensor housing.

[0013] Optionally, a plurality of isolation columns are provided in the sensor housing, and the sensing module is mounted on the isolation columns.

[0014] Optionally, a nameplate is mounted on the sensor housing.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a mine intrinsically safe smoke sensor with the following features:

[0017] Beneficial effects:

[0018] 1. The utility model drives the seal to rotate through the knob, so that the seal opens and closes the air holes on the sensor housing during the rotation process, thereby reducing the corrosion of the sensor module caused by water vapor entering the sensor housing along the smoke chamber during storage, and solves the problem that some sensors of the existing smoke sensor may still be affected by moisture under special circumstances, causing certain losses;

[0019] 2. The utility model can prevent larger coal blocks from splashing into and accumulating in the sensor housing along the air holes by providing a dustproof net in the communicating hole, and can also prevent insects and ants from entering the sensor housing;

[0020] 3. The utility model improves the warning and reminder function by providing a display light to ensure that people pay attention quickly. At the same time, in order to prevent the display light from being damaged, a lampshade is provided outside the display light so that the lampshade can protect the display light. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 Shows Figure 1 A schematic cross-sectional structure diagram of ;

[0023] Figure 3 Shows Figure 1 Schematic diagram of the left view structure;

[0024] Figure 4 A schematic structural diagram of a seal is shown.

[0025] In the figure: 1. sensor housing; 101. upper housing; 102. lower housing; 2. sensing module; 3. air hole; 4. sealing member; 5. connecting hole; 6. knob; 7. dust screen; 8. eye screw; 9. display light; 10. lampshade; 11. isolation column; 12. nameplate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example: See Figures 1 to 4 According to an embodiment of the utility model, a technical solution is provided: a mine intrinsically safe smoke sensor, comprising: a sensor housing 1, a seal 4 and a knob 6, wherein a sensing module 2 can be installed in the sensor housing 1. It should be noted that the sensing module 2 can be composed of a photodiode, an infrared light-emitting diode and a circuit board, or a gas-sensitive detection head, a signal amplifier and a circuit board, or a smoke detector and a circuit board. One end of the sensor housing 1 can be installed on a mining mechanical equipment or a wall, and an air hole 3 is opened on the other end so that external gas can be The air hole 3 enters the shell and is detected by the sensing module 2; the sealing member 4 can fit the inner wall of the smoke end, and through the connecting hole 5 provided on the sealing member 4, the external gas can enter the shell from the connecting hole 5 along the air hole 3 and be detected; the knob 6 can drive the sealing member 4 to rotate, and after the knob 6 drives the sealing member 4 to rotate, the part of the sealing member 4 without the connecting hole 5 can seal the air hole 3, and when the air hole 3 does not need to be sealed, the knob 6 can be rotated to drive the sealing member 4 to rotate, so that the connecting hole 5 on the sealing member 4 is aligned with the air hole 3, so that the external gas enters the sensor housing 1.

[0028] The mining intrinsically safe smoke sensor adopting the above structure drives the seal 4 to rotate through the knob 6, so that the seal 4 opens and closes the air hole 3 on the sensor housing 1 during the rotation, thereby reducing the corrosion of the sensing module 2 caused by water vapor entering the sensor housing 1 along the smoke chamber during storage, thereby solving the problem that some sensors of the existing smoke sensors may still be affected by moisture under special circumstances, causing certain losses.

[0029] In this embodiment, since the sensors are mostly located in workplaces such as underground coal mines, open-pit coal mines or coal preparation plants, in order to prevent larger coal blocks from splashing into the sensor housing 1 along the air holes 3 and accumulating in the sensor housing 1, a dustproof net 7 is fixed in the multiple connecting holes 5 to reduce the amount of coal blocks entering the sensor housing 1. At the same time, the dustproof net 7 can also prevent insects and ants from entering the sensor housing 1.

[0030] In this embodiment, the sensor is used as one of the safety lines, and usually the sensor needs to be inspected regularly to ensure the normal use of the sensor. For the convenience of disassembly, the sensor housing 1 is divided into an upper shell 101 and a lower shell 102. The upper shell 101 and the lower shell 102 are connected by threads. When disassembly is required, the sensor housing 1 can be separated by rotating the lower shell 102, so as to facilitate the inspection of the inside of the sensor housing 1.

[0031] In this embodiment, in order to facilitate people to install the sensor, a lifting screw 8 is threadedly connected to the upper shell 101. When the sensor needs to be hung, the sensor can be quickly hung through the lifting screw 8. Since the lifting screw 8 is threadedly connected to the upper shell 101, when it is not needed, the lifting screw 8 can also be separated from the upper shell 101 by rotating the lifting screw 8.

[0032] In this embodiment, the light in workplaces such as underground coal mines, open-pit coal mines and coal preparation plants is generally dim. In order to serve as a warning and reminder, a display light 9 is provided on the sensor housing 1. The display light 9 can at least display red and green lights to ensure that people pay attention quickly. At the same time, in order to prevent the display light 9 from being damaged, a lampshade 10 is provided outside the display light 9 so that the lampshade 10 can protect the display light 9.

[0033] In this embodiment, in order to facilitate the installation of the sensing module 2, a plurality of isolation columns 11 are provided in the sensor housing 1. During installation, the sensing module 2 can be installed on the isolation columns 11 to avoid being directly installed on the inner wall of the sensor housing 1, which would cause damage to the sensing module 2 when the sensor housing 1 is bumped or dented.

[0034] In this embodiment, the nameplate 12 usually records product information, identifies technical parameters and safety warnings, etc. In order to facilitate maintenance or use and to identify information such as the place of production and production time, a nameplate 12 is installed on the sensor housing 1 to help people understand the sensor.

[0035] Working principle:

[0036] S1. Installation and precautions: The sensor can be installed on the belt conveyor frame, wall or other mechanical equipment. At the same time, pay attention to adjusting the height and wind direction of the smoke sensor;

[0037] S2, sensor working process, after the sensor is installed, the seal 4 is rotated by twisting the knob 6 to align the connecting hole 5 of the seal 4 with the air hole 3. At this time, the external gas can enter the sensor housing 1 from the connecting hole 5 along the air hole 3. When the smoke concentration in the external gas reaches 5% obs / m, the sensing module 2 responds, and the display light 9 changes from green to red and flashes continuously, and the response time is ≤20s. At the same time, the associated external control box receives the smoke signal, the control box voice alarm, starts the external solenoid valve, starts watering, realizes smoke protection or automatic fire extinguishing, and closes the solenoid valve after 2 minutes of automatic watering to save water. The watering time can be adjusted on the associated control box;

[0038] S3. The rated voltage must be marked on nameplate 12, and the power supply used must be consistent with the rated voltage on nameplate 12;

[0039] S4. Maintenance. During regular maintenance, since the upper shell 101 is usually installed on the belt conveyor frame, it is only necessary to rotate the lower shell 102 to separate the lower shell 102 from the upper shell 101. At this time, the air holes 3 and the connecting holes 5 of the seal 4 on the lower shell 102 can be cleaned to remove dust, and the sensing module 2 can be maintained at the same time. After the maintenance is completed, the lower shell 102 and the upper shell 101 are threadedly connected. Precautions: The electrical parameters, specifications and models of the intrinsically safe circuit and components related to the intrinsically safe circuit must not be changed arbitrarily during maintenance.

[0040] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The intrinsically safe smoke sensor for mining is characterized by: include: A sensor housing (1) in which a sensor module (2) can be installed, the sensor housing (1) having a mounting end and a smoke end, the mounting end being mountable on mining machinery or a wall, the smoke end being provided with an air hole (3), through which external substances can enter the housing through the air hole (3); A sealing member (4) is attached to the inner wall of the smoke end and is provided with a communicating hole (5) adapted to the air hole (3); A knob (6) which is rotatably connected to the smoke end and extends into the sensor housing (1) and is fixed to the sealing member (4); After the knob (6) drives the sealing member (4) to rotate, the portion of the sealing member (4) that is not provided with the communicating hole (5) can seal the air hole (3).

2. The intrinsically safe smoke sensor for mining according to claim 1 is characterized in that: A dustproof net (7) is fixed inside the communicating hole (5).

3. The intrinsically safe smoke sensor for mining according to claim 1 is characterized in that: The sensor housing (1) comprises an upper shell (101) and a lower shell (102), wherein the upper shell (101) and the lower shell (102) are threadedly connected.

4. The intrinsically safe smoke sensor for mining according to claim 3 is characterized in that: A lifting eye screw (8) is threadedly connected to the upper shell (101).

5. The mine intrinsically safe smoke sensor according to claim 1 is characterized in that: The sensor housing (1) is provided with a display light (9), the display light (9) is controlled by the sensing module (2), and a lampshade (10) is provided outside the display light (9), and the lampshade (10) is fixed to the sensor housing (1).

6. The intrinsically safe smoke sensor for mining according to claim 1 is characterized in that: A plurality of isolation columns (11) are arranged in the sensor housing (1), and the sensor module (2) is mounted on the isolation columns (11).

7. The intrinsically safe smoke sensor for mining according to claim 1 is characterized in that: A nameplate (12) is installed on the sensor housing (1).

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