Coal mine underground tunneling dust suppressor

Abstract

The utility model relates to the technical field of dust suppressors, and particularly discloses a coal mine underground tunneling dust suppressor which comprises a lantern ring coaxially and fixedly connected to the outer surface of a shaft sleeve of a tunneling machine, and a spraying assembly and a wind pressure assembly which are sequentially and fixedly connected to the lantern ring. The wind pressure assembly comprises a wind cylinder fixedly connected to the lantern ring, a wind outlet ring table fixedly connected to the end, facing the tunneling drill bit, of the wind cylinder, a fan blade structure rotationally connected to the interior of the wind cylinder, a driving structure fixedly connected to the other end of the wind cylinder and a first filter screen, the driving structure is used for driving the fan blade mechanism to rotate, and a wind outlet ring groove communicating with an inner cavity of the wind cylinder is formed in the wind outlet ring table; a plurality of air outlet holes which are communicated with the air outlet ring groove and blow air to the spraying assembly are further formed in the air outlet ring table, and the problems that after water mist sprayed by a traditional tunneling dust suppressor diffuses, the front view field can be blocked, then a driver is influenced to observe the working condition of a tunneling drill bit, and tunneling work is influenced are solved.

Description

Technical Field

[0001] The present application relates to the technical field of dust suppressors, and specifically discloses a dust suppressor for underground coal mine excavation. Background Art

[0002] Underground coal mining, as a method of underground mining, refers to the excavation of wells, tunnels, and chambers of various shapes, sections, or criss-crossing structures in rock and soil layers or ore layers.

[0003] During tunneling in coal mines, drivers operate tunnel boring machines (TBMs). During tunneling, the drill bit at the front of the TBM breaks up rock and soil to create a channel. This crushing process easily generates large amounts of dust, and drivers who work in high dust concentrations for extended periods are susceptible to lung problems.

[0004] Therefore, in the prior art, such as a coal mine underground tunneling dust suppressor with Chinese patent publication number CN220909752U, a first mounting plate, a second mounting plate, a fixed sleeve plate, a plastic-sprayed ring, a spray head and a water injection pipe are installed on the outer surface of the tunneling machine shaft. During the tunneling process, water mist is sprayed toward the tunneling drill bit to form a water curtain, and the dust formed during the tunneling process is adsorbed by the sprayed water mist to prevent the dust from escaping.

[0005] Although water mist can reduce dust, high-concentration water mist will obstruct the field of vision ahead after spreading, thereby affecting the driver's observation of the working conditions of the tunneling drill bit and affecting the progress of tunneling work.

[0006] In view of this, the inventor provides a coal mine underground excavation dust suppressor to solve the above problems. Utility Model Content

[0007] The utility model aims to solve the problem that the water mist sprayed by the traditional tunneling dust suppressor will block the front view after diffusion, thereby affecting the driver's observation of the working condition of the tunneling drill bit and affecting the tunneling work.

[0008] In order to achieve the above-mentioned purpose, the basic scheme of the present utility model provides a coal mine underground tunneling dust suppressor, including a ring coaxially fixed to the outer surface of the tunneling machine sleeve, a spray assembly and a wind pressure assembly fixed to the ring in sequence, the wind pressure assembly including a wind duct fixed to the ring, an air outlet ring platform fixed to one end of the wind duct facing the tunneling drill bit, a fan blade structure rotatably connected to the wind duct, a driving structure fixed to the other end of the wind duct and a first filter screen, the driving structure is used to drive the fan blade mechanism to rotate, an air outlet ring groove connected to the inner cavity of the air duct is provided on the air outlet ring platform, and a plurality of air outlet holes connected to the air outlet ring groove and blowing air to the spray assembly are also provided on the air outlet ring platform.

[0009] Furthermore, a closed air induction ring platform is fixedly connected to the outer edge of the end of the air outlet ring platform in the circumferential direction.

[0010] Furthermore, the spray assembly is fixedly connected to the collar on the inner side of the induced draft ring platform.

[0011] Furthermore, the free end of the air induced ring platform is tilted and opened outwards toward the direction of the excavation drill bit.

[0012] Furthermore, the air induction ring platform is provided with an air induction ring groove which is connected with the air outlet ring groove and passes through to the free end surface of the air induction ring platform.

[0013] Furthermore, the spray assembly includes an inner ring fixed to the sleeve, an outer ring fixed to the inner ring and having a water supply ring groove inside, nozzles circumferentially arranged on the outer ring and connected to the water supply ring groove, and a water supply pipe connected to the outer ring and connected to the water supply ring groove.

[0014] Furthermore, the end surface of the outer ring connected to the nozzle is tilted and opened outwards toward the direction of the drilling bit.

[0015] The principle and effect of this solution are:

[0016] 1. Compared with the prior art, in the process of spraying water mist from the spray assembly to the tunneling drill bit and its surroundings, the drive structure drives the fan blade structure to rotate, and the fan blade structure sucks air from the rear and supplies it to the air outlet ring groove of the air outlet ring platform through the air duct, and finally blows it out through the air outlet hole and blows it toward the spray assembly. The water mist sprayed by the spray assembly can be guided to move forward as much as possible and absorb the dust formed or just formed in front, thereby playing a dust suppression role. This solves the problem of traditional tunneling dust suppressors that the water mist sprayed by the spray assembly will obstruct the field of vision in front after diffusion, thereby affecting the driver's observation of the working condition of the tunneling drill bit and affecting the progress of tunneling work.

[0017] 2. Compared with the prior art, the utility model further installs an air induction ring platform on the outer edge of the air outlet ring platform, and the spray assembly is installed on the inner side of the air induction ring platform, which can block the sprayed water mist through the air induction ring platform. At the same time, the air induction ring platform is also provided with an air induction ring groove, which blows outwards through the air induction ring groove to form a wind wall, further preventing the water mist from spreading outward.

[0018] 3. Compared with the prior art, the air induced ring platform of the utility model is expanded outward, and the wind wall formed has an outward inclination angle, so that the water mist inside is diffused in a cone shape, and the diffusion range gradually increases toward the direction of the excavation drill bit, thereby expanding the dust suppression range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic diagram of a coal mine underground excavation dust suppressor proposed in an embodiment of the present application is shown;

[0021] Figure 2 A cross-sectional view of a coal mine underground excavation dust suppressor proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0022] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0023] The figure marks in the drawings of the specification include: tunnel boring machine sleeve 1, tunnel boring machine drill bit 2, collar 3, air duct 4, air induced air ring platform 5, outer ring 6, second filter screen 7, nozzle 8, rotating ring 9, mountain 10, driven ring platform 11, transmission shaft 12, and drive motor 13.

[0024] A coal mine underground excavation dust suppressor, for example Figure 1 and Figure 2 As shown:

[0025] It includes a collar 3 coaxially fixedly mounted on the surface of the tunnel boring machine sleeve 1, and a spray assembly and a wind pressure assembly sequentially fixedly mounted on the collar 3 from left to right. A tunnel boring drill bit is mounted on the left end of the tunnel boring machine sleeve 1.

[0026] The wind pressure assembly includes a wind tube 4 fixedly mounted on the collar 3, an air outlet ring platform fixedly mounted on the left end face of the wind tube 4, a rotatable fan blade structure mounted in the wind tube 4, a drive structure fixedly mounted on the right end of the wind tube 4 and a first filter screen, and the drive structure is used to drive the fan blade structure to rotate.

[0027] Among them, the air outlet ring platform is also provided with an air outlet ring groove connected to the inner cavity of the air duct 4, and the left end of the air outlet ring platform is provided with a plurality of air outlet holes connected with the air outlet ring groove and used for blowing air to the spray assembly.

[0028] Preferably, a closed air induction ring platform 5 is circumferentially welded to the outer edge of the end of the air outlet ring platform, and the spray assembly is installed on the collar 3 inside the air induction ring platform 5, and the free end of the air induction ring platform 5 is tilted outward toward the direction of the drilling bit.

[0029] At the same time, the induced air ring platform 5 is provided with an induced air ring groove which is connected with the air outlet ring groove and extends to the free end surface. The induced air ring platform 5 is also provided with a closed second filter screen 7 which shields the induced air ring groove.

[0030] The fan blade structure comprises a rotating ring 9, rotatably mounted on the collar 3 inside the fan tube 4, and four blades fixedly mounted on the rotating ring 9. In this embodiment, two blades form a group, with the two groups staggered along the axis. A limiting ring is integrally formed on the inside of the rotating ring 9, and the outer wall of the collar 3 has a limiting groove for the limiting ring to slide within.

[0031] like Figure 2 As shown, in this embodiment, the right end of the air duct 4 is provided with an annular groove that communicates with the inner cavity, and the inner length of the right end of the air duct 4 is shorter than the outer length. The right end of the rotating ring 9 is coaxially fixedly connected to a driven ring base 11 that extends from the inner end face of the right end of the air duct 4. The right end outer wall of the driven ring base 11 is circumferentially provided with a plurality of tooth grooves. The first filter is installed between the driven ring base 11 on the inner side of the tooth groove and the outer inner wall of the right end of the air duct 4. The outer wall of the first filter is fixedly connected to the outer inner wall of the right end of the air duct 4, and the outer wall of the first filter is able to rotate relative to the outer wall of the driven ring base 11.

[0032] A semicircular support plate is also installed at the right end of the wind tube 4. The driving structure includes a driving motor 13 fixedly mounted on the support plate, a transmission shaft 12 mounted on the support plate and rotatable and also passing through the support plate, a belt transmission mechanism fixedly mounted between the transmission shaft 12 and the output shaft of the driving motor 13, and a gear fixedly mounted on the other end of the transmission shaft 12, and the gear is engaged with the tooth groove opened on the driven ring table 11.

[0033] The spray assembly includes an inner ring fixedly mounted on the sleeve 3, an outer ring 6 mounted on the outer wall of the inner ring and fixedly connected by a connecting rod and having a water supply ring groove inside, nozzles 8 circumferentially mounted on the outer ring 6 and connected to the water supply ring groove, and a water supply pipe mounted on one side of the outer ring 6 and connected to the water supply ring groove.

[0034] In this embodiment, the end face of the outer ring 6 connected to the nozzle 8 is tilted outward toward the boring bit, and the tilt angle of the end face of the outer ring 6 is smaller than the tilt angle of the end face of the induced draft ring 5.

[0035] When the utility model is used, during the rotation of the tunnel boring machine shaft in the tunnel boring machine shaft sleeve 1, the driving motor 13 is also started synchronously, and the water supply pipe supplies water;

[0036] The water supply pipe supplies water into the water supply ring groove, and the water is sprayed out through the nozzle 8 to form water mist. When the water mist is sprayed out due to the inclination angle of the end face of the outer ring 6, it has a certain angle and a tendency to expand outward. Since the head of the excavation drill bit is large, the dust generated during the excavation process mainly diffuses to the outside of the excavation drill bit. Therefore, the inclined nozzle 8 can cover the dust that diffuses outward, thereby increasing the coverage range of the water mist.

[0037] The drive motor 13 is started, and the output shaft of the drive motor 13 is driven by the belt transmission mechanism and the transmission shaft 12, which can drive the driven ring platform 11 and the rotating ring 9 to rotate synchronously, thereby driving the fan blades to rotate, and the fan blades blow air from the rear toward the air outlet ring platform. The airflow sucked in by the rotation of the fan blades is filtered by the first filter and then discharged from the air outlet holes on the air outlet ring platform. The air outlet holes are aligned with the outer ring 6 to increase the flow speed of the water mist;

[0038] At the same time, the wind sucked in by the rotation of the fan blades is also ejected through the air induction ring groove on the air induction ring platform 5, forming a wind wall. The inclination angle of the air induction ring groove is greater than the inclination angle of the end face of the outer ring 6. Therefore, the coverage area of ​​the wind wall is larger than the initial diffusion surface of the water mist. The wind pressure applied by the wind wall can block most of the water mist inside the wind wall, reducing the diffusion of the water mist and preventing the diffusion of high-concentration water mist from affecting the driver's field of vision.

[0039] At the same time, within the range formed by the wind wall, the continuous spraying of water mist can enhance the dust removal effect.

[0040] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A coal mine underground excavation dust suppressor, characterized in that: It includes a collar coaxially fixed to the outer surface of the tunnel boring machine shaft sleeve, a spray assembly and a wind pressure assembly fixed to the collar in sequence, the wind pressure assembly includes a wind tube fixed to the collar, an air outlet ring platform fixed to one end of the wind tube facing the tunnel boring drill bit, a fan blade structure rotatably connected to the wind tube, a driving structure fixed to the other end of the wind tube and a first filter screen, the driving structure is used to drive the fan blade mechanism to rotate, an air outlet ring groove connected to the inner cavity of the wind tube is provided on the air outlet ring platform, and a plurality of air outlet holes connected to the air outlet ring groove and blowing air to the spray assembly are also provided on the air outlet ring platform.

2. A coal mine underground excavation dust suppressor according to claim 1, characterized in that: The outer edge of the end portion of the air outlet ring platform is circumferentially fixed with a closed air induction ring platform.

3. A coal mine underground excavation dust suppressor according to claim 2, characterized in that: The spray assembly is fixedly connected to the sleeve ring on the inner side of the air induced ring platform.

4. A coal mine underground excavation dust suppressor according to claim 3, characterized in that: The free end of the air induced ring platform is tilted and opened outwards toward the direction of the excavation drill bit.

5. A coal mine underground excavation dust suppressor according to any one of claims 2 to 4, characterized in that: The air induction ring platform is also provided with an air induction ring groove which is connected with the air outlet ring groove and passes through to the free end surface of the air induction ring platform.

6. A coal mine underground excavation dust suppressor according to claim 1, characterized in that: The spray assembly includes an inner ring fixed on the sleeve, an outer ring fixed to the inner ring and having a water supply ring groove inside, spray heads circumferentially arranged on the outer ring and connected to the water supply ring groove, and a water supply pipe connected to the outer ring and connected to the water supply ring groove.

7. A coal mine underground excavation dust suppressor according to claim 6, characterized in that: The end surface of the outer ring connected to the nozzle is tilted and opened outwards toward the direction of the excavation drill bit.

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