Mining intrinsic safety type wireless sensor with rotating antenna

Abstract

The utility model relates to a mining intrinsic safety type wireless sensor with a rotary antenna. The mining intrinsic safety type wireless sensor comprises a data acquisition and processing device, a shell and an antenna device, the antenna device comprises an antenna and a rotating seat; the shell is provided with a shell opening, so that the rotating seat can be rotationally connected with the lower end of the side surface of the shell through a screw and a pressing sheet, and the antenna can rotate around the central axis of the rotating seat on the basis of enhancing the mechanical strength of the antenna device, so that the antenna can be far away from the shell during working and is kept vertical to the direction of an underground roadway, and signal transmission is enhanced; a sealing ring is arranged between the rotating seat and the shell, so that dust can be well prevented from entering the sensor through an opening of the shell; and the boss is arranged on the pressing sheet, and the shell limiting nail is correspondingly arranged on the shell, so that the condition that the antenna is pulled due to excessive rotation of the antenna is avoided. The sensor can better adapt to the special underground environment and is convenient to store and transport.

Description

Technical Field

[0001] The utility model relates to the field of intrinsically safe wireless communication electrical equipment for mines, in particular to an intrinsically safe wireless sensor for mines with a rotating antenna. Background Art

[0002] The statements in this section only provide background information related to the present disclosure, and these statements may constitute prior art. In the process of implementing the present utility model, the inventor found that there are at least the following problems in the prior art.

[0003] The working environment in the mine is harsh and explosive, so a variety of mine intrinsically safe sensors are needed to monitor the environment. Intrinsic safety is the abbreviation of intrinsic safety. In the coal mining industry, intrinsic safety is also called intrinsic safety. It is the safest explosion-proof type among all explosion-proof types. Intrinsic safety products cannot cause explosion of flammable and explosive gases in the surrounding environment regardless of internal short circuit or short circuit. So it is called intrinsic safety.

[0004] Due to the difficulty of underground wiring, wireless devices have been used to replace the original wired transmission in recent years. For example, intrinsically safe wireless sensors used to monitor methane concentrations, such as Figure 1 As shown in the figure, the wireless laser methane module is used to collect the ambient methane concentration. When the methane concentration reaches the alarm point, light and sound alarms are issued, and the communication module and antenna device are used to synchronously transmit the alarm to the control room to ensure that the workers in the mine can evacuate the dangerous area in time. Of course, there are not only mine intrinsically safe wireless sensors that monitor methane concentration, but also mine intrinsically safe wireless sensors of various types that monitor temperature, pressure, oxygen content, smoke, etc.

[0005] Due to the flammable and explosive nature of mines, mine intrinsically safe wireless sensors all use relatively low power. The applicant has found in practice that the signal sent to the control room by low-power intrinsically safe wireless sensors is relatively poor. Once an emergency situation occurs (such as the excessive methane concentration mentioned above), every second may determine the life safety of the staff. Therefore, how to increase the signal strength of mine intrinsically safe wireless sensors as much as possible is the focus of research on underground production safety.

[0006] In addition, due to the long-term vibration environment underground, coal blocks that fall from the top of the tunnel may break the antenna, resulting in interruption of signal transmission. There is also a lot of dust underground, so most of the current intrinsically safe wireless sensors have the antenna device fixed to the shell by welding to prevent dust from entering the sensor through the external antenna device and affecting the normal operation of the sensor. Summary of the invention

[0007] In view of the above problems, the purpose of the present invention is to solve some of the problems in the prior art, or at least alleviate these problems.

[0008] A mine-used intrinsically safe wireless sensor with a rotating antenna comprises a data acquisition and processing device, a shell and an antenna device; the data acquisition and processing device is arranged in the shell, and can collect data and send signals through the antenna device; the antenna device comprises an antenna and a rotating seat connected to the antenna; the rotating seat is arranged at the lower end of the side of the shell; the rotating seat can drive the antenna to rotate around the central axis of the rotating seat, so that the antenna remains perpendicular to the direction of the underground tunnel when working.

[0009] A shell opening is provided at a position corresponding to the shell and the rotating seat, and a pressing sheet is provided on the inner side of the shell opening; a plurality of threaded holes are provided on a side of the rotating seat facing the shell, corresponding to the pores of the pressing sheet, and can be tightly connected to the pressing sheet through screws located in the shell opening; the threaded holes of the rotating seat are inscribed in the shell opening.

[0010] Furthermore, a sealing ring placement groove is provided on one side of the rotating seat facing the outer shell; the inner diameter of the sealing ring placement groove is larger than the aperture of the opening of the outer shell; and a sealing ring is provided in the sealing ring placement groove.

[0011] Furthermore, the pressing piece is provided with an outward boss, and a shell limiting pin is provided at a corresponding position on the inner side of the shell; when the rotating seat drives the pressing piece to rotate, the boss is limited by the shell limiting pin so that the rotation angle of the rotating seat does not exceed 360 degrees.

[0012] The antenna is detachably connected to the rotating seat via a fixing seat.

[0013] Preferably, the antenna is a copper rod antenna; and the pressing sheet is a metal pressing sheet.

[0014] Furthermore, the rotating seat is provided with an arc-shaped baffle in the opposite direction of the antenna.

[0015] The utility model has the following beneficial effects:

[0016] 1. The rotating design of the rotating seat in this application enables the antenna of the sensor to rotate to the side away from the housing when working, which not only prevents the signal from being affected by the housing, but also keeps the antenna perpendicular to the lane direction, ensuring that the signal is transmitted farther, thereby improving the signal strength;

[0017] 2. The present application also improves the connection method between the rotating seat and the housing. The rotating seat is connected to the pressing sheet by screws, so that the rotating seat and the housing can be tightly connected, which increases the mechanical strength of the antenna device. In addition, an arc-shaped baffle is provided to prevent the antenna from being broken by coal blocks falling from the top of the tunnel or being knocked away from the set rotation angle while maintaining signal strength.

[0018] 3. The present application provides a sealing ring between the rotating seat and the housing, which not only facilitates the rotation of the antenna, but also makes it difficult for dust to enter the sensor through the opening of the housing and affect the normal operation of the components;

[0019] 4. The present application sets a boss at the pressing piece, which can limit the rotation angle of the rotating seat to no more than 360 degrees, and can effectively avoid the situation where the internal antenna of the sensor is pulled due to excessive rotation of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above structure of the present invention can be further illustrated by the non-limiting embodiments given in the following drawings.

[0021] Figure 1 It is a structural diagram of the utility model in the transportation or storage state;

[0022] Figure 2 It is a schematic diagram of the assembly of the antenna device of the utility model;

[0023] Figure 3 It is a side view of the utility model;

[0024] Figure 4 It is a working schematic diagram of the utility model when the lane has a certain slope;

[0025] Figure 5 It is a working schematic diagram of the utility model when the lane has another slope;

[0026] Figure 6 This is an enlarged view of the structure of the rotating base of the antenna device.

[0027] Among them: 1-antenna; 2-rotating seat; 3-pressing sheet; 4-fixing seat; 5-boss; 6-housing; 7-light alarm device; 8-buzzer; 9-wireless laser methane module; 10-housing limit pin; 11-housing opening; 12-sealing ring placement groove; 13-sealing ring. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings. The embodiments of the present invention are only used to illustrate the present invention rather than to limit the present invention. Without departing from the technical concept of the present invention, various substitutions and changes can be made based on common technical knowledge and customary means in the field, which should all be included in the scope of the present invention.

[0029] After long-term and in-depth research on intrinsically safe wireless sensors for mining, the applicant found that the problems of poor signal and signal interruption in such wireless sensors are largely related to the special environment underground.

[0030] First, due to the flammable and explosive nature of the mine, the intrinsically safe wireless sensor can only be a low-power device, which inevitably leads to a signal transmission power that is inferior to that of a high-power device. In addition, the mine is deep underground, and the underground tunnels are winding and the slopes are also ups and downs, making signal poor a necessity. According to the applicant's in-depth research and experimental findings, since high-frequency wireless signals basically propagate in a straight line, when the angle of the antenna 1 is perpendicular to the direction of the underground tunnel, its wireless signal can be transmitted farther, thereby solving the problem of the slope of the underground tunnel.

[0031] Furthermore, because the underground environment is poor, with heavy sewage and dust, in order to prevent the housing 6 of the wireless sensor from being corroded and affecting the normal operation of the components inside, the housing 6 of most mining wireless sensors is a metal housing. Figure 1 As shown, when the antenna 1 is blocked by the metal housing 6, the signal will be blocked by the metal housing 6. This is another reason for the poor signal.

[0032] Based on the above analysis, the applicant designed the following solution.

[0033] like Figures 1 to 5 As shown, a mine-used intrinsically safe wireless sensor with a rotating antenna includes a data acquisition and processing device, a housing 6 and an antenna device; the data acquisition and processing device is arranged in the housing 6, and can collect data and send signals through the antenna device; the antenna device includes an antenna 1 and a rotating seat 2 connected to the antenna 1; the rotating seat 2 is arranged at the lower end of the side of the housing 6; the rotating seat 2 can drive the antenna 1 to rotate around the central axis of the rotating seat 2, so that the antenna 1 remains perpendicular to the direction of the underground tunnel when working. When the sensor is not working (such as transportation or storage), the antenna 1 can also be placed vertically upward, such as Figure 1 As shown, in addition to reducing the storage space, the housing 6 can also be used to protect the antenna 1 to a certain extent to prevent the antenna 1 from being damaged due to collision during transportation and storage.

[0034] Among them, Figure 1 As shown, the data acquisition and processing device includes but is not limited to light alarm device 7, buzzer 8, acquisition module (such as wireless laser methane module 9) and other components. The internal structure of the mine intrinsically safe wireless sensor of the present application is roughly the same as that of the general intrinsically safe wireless sensor.

[0035] Since the rotating seat 2 is arranged at the lower end of the side of the housing 6, the antenna 1 can be rotated to a side away from the housing 6 when the sensor is working. Figure 4Or 5, so as to avoid the antenna 1 being affected by the housing 6, so as to make the signal better. In addition, the angle of the antenna 1 can be adjusted accordingly according to the slope of the underground tunnel. For example, when the tunnel is flat, the antenna 1 is downward. When the tunnel has a certain slope, the angle of the antenna 1 is adjusted accordingly, so that the antenna 1 is always perpendicular to the direction of the tunnel, such as Figure 4 Or 5, thereby ensuring that the signal is transmitted farther. In addition, because of the position of the rotating base 2, the antenna 1 is perpendicular to the direction of the tunnel and the antenna 1 faces downward, and the rotating base 2 can be used to resist the coal blocks that fall from the top of the tunnel from time to time, thereby preventing the antenna 1 from being broken by the coal blocks.

[0036] However, since the rotating base 2 needs to drive the antenna 1 to rotate, its mechanical strength is generally not very strong. Therefore, the applicant has improved the connection method between the rotating base 2 and the housing 6 to improve the connection strength of the rotating base 2. Figure 2 As shown, a shell opening 11 is opened at a position corresponding to the shell 6 and the rotating seat 2, and a pressing sheet 3 is provided on the inner side thereof; a plurality of threaded holes are provided on a side of the rotating seat 2 facing the shell 6, corresponding to the pores of the pressing sheet 3, and can be tightly connected with the pressing sheet 3 by screws located in the shell opening 11; the threaded holes of the rotating seat 2 are inscribed in the shell opening 11.

[0037] The above-mentioned screws, on one hand, connect the rotating seat 2 with the pressing plate 3 on the inner side of the outer shell 6, so that the rotating seat 2 can drive the antenna 1 to rotate; on the other hand, because the screws are in contact with the inner edge of the opening 11 of the outer shell (i.e., inscribed), the screws can provide certain support to the rotating seat 2 and the antenna 1 thereon. In addition, the rotating seat 2 and the pressing plate 3 are tightly connected to the outer shell 6 by screws, thereby increasing the mechanical strength of the antenna device, thereby avoiding the problem of coal blocks falling from the top of the underground tunnel and breaking the antenna device. In particular, when the antenna 1 is perpendicular to the horizontal plane (i.e., the tunnel is flat, with no slope or a very small slope), the coal blocks falling from above can only hit the rotating seat 2 with enhanced mechanical strength, thereby ensuring that the antenna 1 is not broken. Even if the antenna 1 has a certain angle due to the slope of the tunnel, such as Figure 4 As shown in Figure 5, since the rotating seat 2 is tightly fitted with the housing 6, a small piece of coal hitting the antenna 1 is not likely to change its rotation angle, which can better ensure that the antenna 1 is not broken or the angle is changed.

[0038] Of course, if a larger lump of coal is encountered, although the rotating seat 2 will protect the antenna 1 within a certain range, if the end of the antenna 1 exposed from the rotating seat 2 is hit, it is still possible to change the rotation angle of the antenna 1. Therefore, the rotating seat 2 is provided with an arc-shaped baffle in the opposite direction of the antenna 1. Since the rotating seat 2 is arranged at the lower end of the side of the shell 6, so that the antenna 1 can rotate to the side away from the shell 6, the antenna 1 of the sensor is facing downward when it is working normally. At this time, since the shielding surface of the arc-shaped baffle is larger than the shielding surface of the rotating seat 2, the arc-shaped baffle arranged in the opposite direction of the antenna 1 can well shield the coal falling from the top for the antenna 1 below, and transmit the force to the rotating seat 2 with enhanced mechanical strength, so as to well protect the antenna 1 and prevent it from being broken or changing the rotation angle. And the arc-shaped baffle arranged in the opposite direction of the antenna 1 will not affect the signal transmission of the antenna 1.

[0039] Since the rotating seat 2 is tightly connected to the shell 6 through the pressing sheet 3, although the mechanical strength of the rotating seat 2 is increased, the tight hard contact mode also increases the difficulty of rotating the antenna 1. In addition, since there is a lot of dust in the underground tunnel, the hard contact between the rotating seat 2 and the shell 6, as well as the shell opening 11 on the shell 6, also provide opportunities for dust to enter the shell 6 through the shell opening 11, affecting the normal operation of the internal components. Therefore, Figure 6 As shown, a sealing ring placement groove 12 is provided on one side of the rotating seat 2 facing the outer shell 6 ; the inner diameter of the sealing ring placement groove 12 is larger than the aperture of the outer shell opening 11 ; and a sealing ring 13 is provided in the sealing ring placement groove 12 .

[0040] The thickness of the sealing ring 13 is greater than the depth of the sealing ring placement groove 12, so that the rotating seat 2 and the shell 6 can achieve a soft contact and tight fit. While enhancing the mechanical strength of the antenna device, it not only facilitates the rotation of the antenna 1, but also can seal the shell opening 11 through a sealing ring whose aperture is larger than the shell opening 11, thereby preventing dust from entering the sensor through the shell opening 11.

[0041] Of course, the sealing ring 13 can also be directly arranged between the rotating seat 2 and the shell 6. However, the sealing ring 13 is arranged in the sealing ring placement groove 12, which can better avoid the problems of displacement of the sealing ring 13, large wear and tear, etc.

[0042] like Figure 2 As shown, the pressing piece 3 is provided with an outward boss 5, and a shell limiting pin 10 is provided at a corresponding position on the inner side of the shell 6; when the rotating seat 2 drives the pressing piece 3 to rotate, the boss 5 is limited by the shell limiting pin 10, so that the rotation angle of the rotating seat 2 does not exceed 360 degrees. The above solution can avoid the situation where the internal antenna is pulled due to excessive rotation.

[0043] like Figure 2As shown, the antenna 1 is detachably connected to the rotating seat 2 via the fixing seat 4, so that the antenna 1 is screwed onto the rotating seat 2 via the fixing seat 4. The antenna 1 and the fixing seat 4 can be fixedly connected or integrally formed.

[0044] The antenna 1 is a copper rod antenna to enhance the signal transmission of the antenna. The pressing plate 3 is a metal pressing plate to avoid corrosion due to the underground environment. The metal pressing plate can also provide better mechanical strength support for the rotating seat 2.

[0045] The fixed connection not specifically mentioned above may be a connection method such as riveting, welding, bolt connection, etc., and the movable connection may be a connection method such as hinged connection.

Claims

1. A mine-use intrinsically safe wireless sensor with a rotating antenna, comprising a data acquisition and processing device, a housing (6) and an antenna device; the data acquisition and processing device is arranged in the housing (6), capable of acquiring data and sending signals through the antenna device; characterized in that: The antenna device comprises an antenna (1) and a rotating seat (2) connected to the antenna (1); the rotating seat (2) is arranged at the lower end of the side of the housing (6); the rotating seat (2) can drive the antenna (1) to rotate around the central axis of the rotating seat (2), so that the antenna (1) remains perpendicular to the direction of the underground tunnel when working.

2. The mine intrinsically safe wireless sensor with a rotating antenna according to claim 1 is characterized in that: The housing (6) and the rotating seat (2) are provided with a housing opening (11) at positions corresponding to each other, and a pressing sheet (3) is provided on the inner side of the housing opening (11); the rotating seat (2) is provided with a plurality of threaded holes on a side facing the housing (6), corresponding to the pores of the pressing sheet (3), and can be tightly connected to the pressing sheet (3) by means of screws located in the housing opening (11); the threaded holes of the rotating seat (2) are inscribed in the housing opening (11).

3. The mine intrinsically safe wireless sensor with a rotating antenna according to claim 2 is characterized in that: A sealing ring placement groove (12) is provided on one side of the rotating seat (2) facing the outer shell (6); the inner diameter of the sealing ring placement groove (12) is larger than the aperture of the outer shell opening (11); and a sealing ring (13) is provided in the sealing ring placement groove (12).

4. The mine intrinsically safe wireless sensor with a rotating antenna according to claim 2 or 3, characterized in that: The pressing plate (3) is provided with an outwardly facing boss (5), and a shell limiting pin (10) is provided at a corresponding position on the inner side of the shell (6); when the rotating seat (2) drives the pressing plate (3) to rotate, the boss (5) is limited by the shell limiting pin (10) so that the rotation angle of the rotating seat (2) does not exceed 360 degrees.

5. The mine intrinsically safe wireless sensor with a rotating antenna according to claim 2 is characterized in that: The antenna (1) is detachably connected to the rotating seat (2) via a fixing seat (4).

6. The mine intrinsically safe wireless sensor with a rotating antenna according to claim 5, characterized in that: The antenna (1) is a copper rod antenna; the pressing sheet (3) is a metal pressing sheet.

7. The mine intrinsically safe wireless sensor with a rotating antenna according to claim 2 or 3, characterized in that: The rotating seat (2) is provided with an arc-shaped baffle in the opposite direction of the antenna (1).

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