Mine excavation safety protection device

Abstract

The utility model relates to the technical field of mine safety protection, in particular to a safety protection device for mine excavation. According to the technical scheme, the device comprises a barrel, a cavity and a piston, the barrel is connected with the cavity, the piston is arranged in the barrel in a lifting and sliding mode through a lifting assembly, an air suction pipe is arranged at an air inlet of the barrel, an air blowing pipe is arranged at an air outlet of the barrel, and one-way valves are arranged in the air blowing pipe and the air suction pipe respectively. A gas detection sensor is arranged in the cavity, a filter plate is arranged at an opening in the bottom end of the cavity, the other end of the gas suction pipe is communicated with an opening in the top end of the cavity, and the other end of the blowing pipe is located below the filter plate. According to the utility model, through the negative pressure suction design, in a mine environment with a low air flow rate, harmful gas is prevented from being excessively accumulated near equipment and detected, dust and impurities on the filter plate are effectively removed during exhaust, and reduction of the filter effect and detection errors caused by accumulated dust are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to mine safety protection technical field especially relates to a mine excavation safety protection device. BACKGROUND

[0002] In the process of mine excavation, the underground environment is complex, and the air flow rate is low, which can easily lead to the accumulation of harmful gases (such as methane) in some areas. Excessive methane concentration may cause serious safety accidents such as explosion, so it is particularly important to monitor the methane concentration in the underground air in real time during mine exploitation. However, most of the traditional gas detection devices rely on passive induction, which may trigger an alarm only when the harmful gas reaches a certain concentration, which has a certain lag and is difficult to warn in time.

[0003] Therefore, we propose a mine excavation safety protection device to solve the existing problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at the problems in the background art and provides a mine excavation safety protection device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a mine excavation safety protection device, comprising a cylinder, a chamber and a piston, the cylinder and the chamber are connected with each other, the inside of the cylinder is provided with the piston which slides up and down through a lifting assembly, the air inlet of the cylinder is provided with a suction pipe, the air outlet of the cylinder is provided with a blowing pipe, the blowing pipe and the suction pipe are respectively provided with a one-way valve, the inside of the chamber is provided with a gas detection sensor, the bottom end opening of the chamber is provided with a filter plate, the other end of the suction pipe is communicated with the top end opening of the chamber, and the other end of the blowing pipe is below the filter plate.

[0006] Preferably, the one-way opening direction of the one-way valve in the blowing pipe is from inside to outside to discharge from the cylinder, and the one-way opening direction of the one-way valve in the suction pipe is from outside to inside to intake air into the cylinder.

[0007] Preferably, the lifting assembly is composed of a cover, a screw block, a gear ring, a motor and a screw rod, the cover is arranged at the bottom end opening of the cylinder, and the screw block is rotatably arranged on the cover.

[0008] Preferably, one end of the screw rod is arranged on the piston, and the screw rod and the screw block are in a threaded engagement state.

[0009] Preferably, the gear ring is arranged on the outer wall of the screw block, the motor is arranged on the cover, the output end of the motor is provided with a gear, and the gear is in a gear tooth engagement with the gear ring.

[0010] Preferably, a circular hole is formed on the cover, and the inner diameter of the circular hole is larger than the diameter of the screw rod.

[0011] Preferably, the outer wall of the barrel body is provided with a connecting rod, and the other end of the connecting rod is arranged on the outer wall of the chamber.

[0012] Preferably, a base is arranged on the outer wall of the barrel body, and mounting holes are symmetrically formed on the base.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] In the use process of the mine excavation safety protection device, the device can be arranged at a specified position inside the excavated mine through the cooperation of the mounting holes and the bolts.

[0015] Due to the low air flow rate in the mine tunnel, harmful gases will accumulate. In order to avoid the harmful gases from being detected only when they accumulate to a certain amount, the lifting assembly is intermittently controlled to work when the gas detection sensor is working. The motor drives the gear to rotate, and the gear and the gear ring are engaged to drive the screw block to rotate. The screw block and the screw rod are threadedly engaged, and the piston is limited from being deflected by the sliding cooperation between the piston and the barrel body. Therefore, the piston is controlled to slide downward. At this time, the barrel body inhales air through the air suction pipe. Under the action of negative pressure, the air near the device enters the chamber after being filtered by the filter plate, and is detected by the gas detection sensor.

[0016] When the piston moves upward, the air in the barrel body is pressed out through the air blowing pipe, and the pressed air blows onto the surface of the filter plate, thereby cleaning the filter plate and avoiding the deposition of impurities on the filter plate to affect the filtering effect.

[0017] The present application avoids the accumulation of harmful gases near the equipment in the mine environment with low air flow rate, improves the sensitivity and coverage of detection, effectively removes dust and impurities on the filter plate during the exhaust process, and avoids the decline of the filtering effect and detection errors caused by dust accumulation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a three-dimensional structure schematic view of the present application;

[0019] Figure 2 is a front view structure schematic view of the present application;

[0020] Figure 3 is a chamber cross-section structure schematic view of the present application;

[0021] Figure 4 It is the sectional structure schematic view of the cylinder body of the utility model.

[0022] Figure 5 It is the sectional structure schematic view of the cylinder body of the utility model.

[0023] Reference signs:

[0024] 1, cover; 2, cylinder body; 3, blowing pipe; 4, suction pipe; 5, base; 6, mounting hole; 7, connecting rod; 8, chamber; 9, filter plate; 10, screw block; 11, gear ring; 12, motor; 13, screw rod; 14, gas detection sensor; 15, one-way valve; 16, piston. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0026] Embodiment one

[0027] As Figures 1-5 shown, the utility model provides a kind of mine excavation safety protection device, including cylinder body 2, chamber 8 and piston 16, cylinder body 2 and chamber 8 are connected with each other, piston 16 is slidably arranged in the inside of cylinder body 2 by lifting assembly, air inlet of cylinder body 2 is equipped with suction pipe 4, air outlet of cylinder body 2 is equipped with blowing pipe 3, one-way valve 15 is respectively equipped in blowing pipe 3, suction pipe 4, the inside of chamber 8 is equipped with gas detection sensor 14, filter plate 9 is equipped at the bottom end opening of chamber 8, another end of suction pipe 4 is communicated with the top end opening of chamber 8, another end of blowing pipe 3 is below filter plate 9.

[0028] Based on embodiment 1:

[0029] The utility model mine excavation safety protection device can be set at specified position inside excavation mine by the cooperation of mounting hole 6 and bolt during use, and the device is connected with external display computer, the concentration of harmful gas methane in underground air is detected by gas detection sensor 14, when the concentration value of methane is abnormal, personnel can conveniently find that the methane concentration of this place exceeds the standard in time;

[0030] Due to the low air flow rate in the mine tunnel, harmful gases will accumulate, in order to avoid the harmful gas accumulation to a certain amount before being detected, when the gas detection sensor 14 works, the lifting assembly works intermittently, the piston 16 slides down, at this time the cylinder 2 inhales through the air suction pipe 4, under the action of negative pressure, the air near the device enters the chamber 8 after being filtered by the filter plate 9, and is detected by the gas detection sensor 14; the piston 16 goes up, the air in the cylinder 2 is pressed out through the air blowing pipe 3, and the pressed air blows to the surface of the filter plate 9, which can clean the filter plate 9 and avoid impurities deposited on the filter plate 9 affecting the filtering effect.

[0031] Embodiment two

[0032] As Figures 1-5 shown, compared with embodiment one, the mine excavation safety protection device further comprises: the one-way opening direction of the one-way valve 15 in the air blowing pipe 3 is from inside to outside to discharge from the cylinder 2, and the one-way opening direction of the one-way valve 15 in the air suction pipe 4 is from outside to inside to inhale into the cylinder 2, so as to ensure the one-way flow of the gas and realize the function separation of the device in the inhaling and exhaling processes.

[0033] The lifting assembly is composed of a cover 1, a screw block 10, a gear ring 11, a motor 12 and a screw rod 13, the cover 1 is arranged at the bottom opening of the cylinder 2, the screw block 10 is rotatably arranged on the cover 1, one end of the screw rod 13 is arranged on the piston 16, the screw rod 13 is in a threaded engagement state with the screw block 10, the gear ring 11 is arranged on the outer wall of the screw block 10, the motor 12 is arranged on the cover 1, the output end of the motor 12 is provided with a gear, the gear is in a gear meshing state with the gear ring 11, a circular hole is formed in the cover 1, the inner diameter of the circular hole is greater than the diameter of the screw rod 13, the screw rod 13 penetrates through the circular hole, the motor 12 drives the gear to rotate, the gear and the gear ring 11 are engaged, so as to drive the screw block 10 to rotate, the screw block 10 and the screw rod 13 are in a threaded engagement state, the piston 16 and the inside of the cylinder 2 are in a sliding fit, and the piston 16 is not deflected, so as to control the piston 16 to perform the lifting action.

[0034] The outer wall of the cylinder 2 is provided with a connecting rod 7, the other end of the connecting rod 7 is arranged on the outer wall of the chamber 8, the outer wall of the cylinder 2 is provided with a base 5 at the upper end, and the base 5 is symmetrically provided with mounting holes 6, so that the device can be arranged at a specified position in the excavated mine through the cooperation of the mounting holes 6 and bolts.

[0035] It should be noted that the motor 12, the gas detection sensor 14 and the one-way valve 15 are existing mature technologies, the working principle and internal structure thereof are known to those skilled in the art, the present application only utilizes the functions and does not improve the internal structure, therefore, the detailed description is not given here, and those skilled in the art can select and arrange them as needed or as convenient.

[0036] The above specific embodiments are only several preferred embodiments of the present application, based on the technical scheme of the present application and the related enlightenment of the above embodiments, the person skilled in the art can make various alternative improvements and combinations on the above specific embodiments.

[0037] It is obvious for the person skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A mine excavation safety shield comprising a barrel (2), a chamber (8) and a piston (16), characterised in that: The cylinder (2) is connected with the chamber (8), the inside of the cylinder (2) is provided with the piston (16) which is lifted and slid by the lifting assembly, the air inlet of the cylinder (2) is provided with the air suction pipe (4), the air outlet of the cylinder (2) is provided with the air blowing pipe (3), the air blowing pipe (3) and the air suction pipe (4) are respectively provided with the one-way valve (15), the inside of the chamber (8) is provided with the gas detection sensor (14), the bottom opening of the chamber (8) is provided with the filter plate (9), the other end of the air suction pipe (4) is communicated with the top opening of the chamber (8), and the other end of the air blowing pipe (3) is below the filter plate (9).

2. A mine excavation safety shield according to claim 1, characterised in that: The one-way opening direction of the one-way valve (15) in the air blowing pipe (3) is from inside to outside to discharge from the cylinder (2), and the one-way opening direction of the one-way valve (15) in the air suction pipe (4) is from outside to inside to inhale into the cylinder (2).

3. A mine excavation safety shield according to claim 1, characterised in that: The lifting assembly is composed of the cover (1), the screw block (10), the gear ring (11), the motor (12) and the screw rod (13), the cover (1) is arranged at the bottom opening of the cylinder (2), and the screw block (10) is rotatably arranged on the cover (1).

4. A mine excavation safety shield according to claim 3, characterised in that: One end of the screw rod (13) is arranged on the piston (16), and the screw rod (13) is in a threaded engagement state with the screw block (10).

5. A mine excavation safety shield according to claim 3, characterised in that: The gear ring (11) is arranged on the outer wall of the screw block (10), the motor (12) is arranged on the cover (1), the output end of the motor (12) is provided with a gear, and the gear is in a gear meshing state with the gear ring (11).

6. A mine excavation safety shield according to claim 3, characterised in that: A circular hole is formed in the cover (1), the inner diameter of the circular hole is greater than the diameter of the screw rod (13), and the screw rod (13) penetrates through the circular hole.

7. A mine excavation safety shield according to claim 1, characterised in that: The outer wall of the cylinder (2) is provided with the connecting rod (7), and the other end of the connecting rod (7) is arranged on the outer wall of the chamber (8).

8. A mine excavation safety shield according to claim 1, characterised in that: The outer wall of the cylinder (2) is provided with the base (5), and the base (5) is symmetrically provided with the mounting hole (6).

Images