WO2023246280A1

WO2023246280A1 - Coal mine air-supply air duct automatic extending apparatus and using method

Info

Publication number: WO2023246280A1
Application number: PCT/CN2023/090260
Authority: WO
Inventors: 荔军; 李再有; 康富军; 李波彤; 侯胜光; 魏鹏飞; 田军君; 袁利才; 连志斌; 石磊
Original assignee: 山西天地赛福蒂科技有限公司
Priority date: 2022-06-24
Filing date: 2023-04-24
Publication date: 2023-12-28
Also published as: CN114810182B; CN114810182A

Abstract

A coal mine air-supply air duct automatic extending apparatus and a using method, relating to the technical field of coal mine driving face ventilation. The coal mine air-supply air duct automatic extending apparatus comprises a tracked vehicle (3), an air duct storage device (1), a winch, an anchor rod, and an air duct (1.6). The air duct is stored in the air duct storage device in advance, the air duct storage device is mounted on the narrow tracked vehicle by means of a lifting/lowering platform (2), and the tracked vehicle has a width equal to or smaller than the diameter of the air duct and is arranged on one side of a roadway and directly below an air-supply air duct outlet. According to the using method of the coal mine air-supply air duct automatic extending apparatus, when a heading machine moves forwards, the tracked vehicle is manually remotely controlled on site or remotely controlled to move forwards, and the air duct in the air duct storage device automatically extends out. According to the coal mine air-supply air duct automatic extending apparatus and the using method, extending while tunneling and automatic extension of the air duct are achieved; and it is guaranteed that a distance L between the air duct outlet and a driving face is always kept, thereby facilitating ventilation and safety.

Description

An automatic extension device for coal mine air supply duct and method of use

Technical field

This application belongs to the field of coal mine tunnel face ventilation technology.

Background technique

At present, the air supply ducts on the excavation working face of coal mines in my country need to be manually connected after the tunnel boring machine completes the cutting operation. The extension operation of the air duct requires at least two people to work at the same time, and sometimes there is climbing operation. The amount of manual work is large and the labor intensity is high. At the same time, the air duct is extended after the excavation operation is completed, and the air duct is supplied during the excavation process. As the distance between the air outlet and the head end continues to increase, the amount of fresh air sent to the head end will continue to decrease, which may affect the ventilation safety of the excavation face.

Therefore, it is necessary to improve the existing blower extension method to realize the automatic extension of the blower on the excavation face, reduce the labor intensity of workers, ensure ventilation safety, and reduce operating risks.

Contents of the invention

The technical problem to be solved by the present invention is: how to provide a device that can realize the automatic extension of the air duct on the excavation face, reduce the labor intensity of workers, ensure ventilation safety, and reduce operating risks.

This application provides an automatic extension device for coal mine air supply ducts, including

Crawler vehicle, the crawler vehicle has a lifting platform;

The air duct storage device includes an air outlet tube, a conical inner tube, an outer tube main body, a front shield, and a rear shield. The outer tube main body is 1/2 formed by cutting along the central axis of the cylinder. Cylinder, the rear shield and the top of the rear side of the outer cylinder body are rotationally connected through the shaft of the air duct storage, the front guard and the top of the front side of the outer barrel main body are rotationally connected through the shaft of the air duct storage, and the bottom of the outer barrel main body is connected through the bracket It is fixed on the lifting platform. There is an air outlet at the right end of the air duct storage. There is a conical inner tube connected with the air outlet inside the air duct storage. The top of the side wall of the air outlet is fixed by a bracket and the right end of the guide tube. , the guide tube is parallel to the central axis of the tapered inner cylinder;

The winch is a constant pressure winch, and the winch of the winch is located above the side wall of the air outlet tube;

Anchor rod, the anchor rod is fixed on the tunnel wall, one end of the wire rope is fixed on the anchor rod after passing through the guide pipe, and the other end of the wire rope is wrapped around the winch of the winch;

The air duct is sleeved on the cone-shaped inner cylinder. There is a row of hanging holes on the top of the air duct. Each hanging hole is connected to a chain link through a chain, and the chain links are in turn placed on the guide tube.

There is a baffle at the junction of the conical inner tube and the air outlet tube. The conical inner tube, the air outlet tube, and the main body of the outer tube are all fixed on the baffle. After the front and rear guards are closed, they work together with the main body of the outer tube to secure the cone-shaped inner tube. The inner cylinder covers the front shield, the rear shield, the main body of the outer cylinder, and the left side of the tapered inner cylinder are flush. The front shield has a first upper convex edge with a row of round holes, and the rear shield has There is an upper flange with a row of round holes, and the first upper flange of the front guard and the second upper flange of the rear guard are connected by bolts passing through the round holes.

There is a through hole on the upper part of the baffle, and the right end of the guide tube passes through the through hole and is fixed with the baffle.

A duct air volume meter is installed on the air outlet tube.

A spring block is fixedly installed at the left end of the front guard, and a spring block is fixedly installed at the left end of the rear guard. Both spring blocks are stuck at the tail of the guide tube.

A method of using an automatic extension device for a coal mine air supply duct. When the crawler truck moves forward, under the action of tension, the chain rings on the guide pipes sequentially break free of the spring retaining plates, and the chain rings on the air duct break away. The air duct corresponding to the ring extends out of the air duct memory in turn. The free chain link is put on the steel wire rope to keep the air duct in a straightened state and complete the automatic extension of the air duct. The crawler vehicle travels about one meter each time and connects the steel wire rope with the steel wire rope. The nearest anchor rod of the crawler vehicle is fixed to prevent the steel wire rope from sagging under the action of its own weight and unable to remain horizontally straight; when the crawler vehicle stops moving, the spring block is blocked in front of the chain link, restricting the chain link from breaking away from the spring block .

When the air duct in the air duct storage is fully extended, open the rear guard and front guard 180 degrees around the axis of rotation, tightly fit the other air duct on the tapered inner cylinder of the air duct storage, and install Install another wire rope and fix it on another anchor rod. Set the multiple links of the other air duct on the guide pipe in sequence. At the same time, connect the other air duct with the installed air duct and outlet duct. After the connection is completed, close the rear guard and front guard around the rotating shaft, and install the fixing bolts; continue with the next operation.

The beneficial effects of this application are: this application stores a certain amount of air ducts in the air duct memory in advance, and installs the air duct storage on a narrow crawler vehicle through a lifting platform, and the width of the crawler vehicle is equal to or less than diameter of the air duct, and is arranged on one side of the tunnel, directly below the air outlet of the air supply duct. When the tunnel boring machine moves forward, manual on-site remote control or remote control crawler vehicle moves forward, and the air duct of the air duct stocker automatically extends. Realize the extension and automatic extension of the air duct as it is dug; ensuring that the distance L between the outlet of the air duct and the head is always maintained, which is conducive to ventilation safety;

A guide tube is designed in the air duct storage device, and the steel wire rope is threaded into the guide tube in advance. The storage air duct is completely put on the guide tube through the chain link. When the crawler vehicle moves forward and drives the air duct to extend outward, the air duct will The lifting ring is naturally set in the steel wire rope, realizing the automatic hanging of the hairdryer; at the same time, the chain ring and the guide tube are circular in design, which facilitates the sliding of the chain ring on the guide tube; and a spring block is designed on the front guard to block the In front of the chain link, when the crawler vehicle is not moving, the air duct that restricts the air duct memory extends outward; when the crawler vehicle moves forward, the chain link is driven to break away from the spring block, allowing the air duct to extend outward.

Through the constant pressure design of the winch, the steel wire rope is always in a straightened state; Even after being hung on the wire rope, it remains in a straight state, reducing the risk of airflow obstruction or even accidents caused by the drooping of the hairdryer.

Description of the drawings

Figure 1 is a schematic diagram of the process diagram before the start of the excavation cycle of this application;

Figure 2 is a schematic diagram of the process of completing an excavation cycle in this application;

Figure 3 is a schematic front view of the hairdryer storage device of the present application with the front shield removed;

Figure 4 is a schematic isometric view of the hairdryer storage device of the present application with the front shield removed;

Figure 5 is a schematic isometric view of the limiter of the hairdryer spring baffle of the present application;

Figure 6 is a schematic isometric view of the application in which the front guard of the air duct storage device is opened and the air duct and wire rope are not installed;

Figure 7 is a schematic isometric view of the air duct storage device of the present application without the air duct and wire rope being installed;

In the picture: 1-dryer storage, 2-lifting platform, 3-crawler, 1.1-wire rope, 1.2-spring block, 1.3-guide tube, 1.4-chain link, 1.5-chain, 1.6-air duct, 1.7-rear guard, 1.8-winch, 1.9-duct air volume meter, 1.10-outer cylinder body, 1.11-air outlet, 1.12-front guard, 1.13-air duct storage air duct connection old air duct interface, 1.14 -Tapered inner cylinder, 1.15-cylinder storage shaft.

Detailed ways

As shown in Figure 1-7, an automatic extension device for coal mine air supply ducts includes

The crawler vehicle 3 has a lifting platform 2 on the crawler vehicle 3, and the lifting platform 2 adopts an existing lifting platform.

The hairdryer memory 1 includes an air outlet tube 1.11, a conical inner tube 1.14, an outer tube main body 1.10, a front shield 1.12, and a rear shield 1.7. The outer tube main body 1.10 is along the central axis of the cylinder. The 1/2 cylinder formed after cutting, the rear shield 1.7 and the rear top of the outer cylinder body 1.10, the peripheral side top, are rotationally connected through the air duct storage shaft 1.15, the front shield 1.12 is connected to the front top of the outer cylinder body 1.10 The rotating shaft 1.15 of the air duct storage is connected by rotation, and the bottom of the outer barrel body 1.10 is fixed on the lifting platform 2 through a bracket. There is an air outlet 1.11 at the right end of the air duct storage 1, and there is an outlet inside the air duct storage 1. The conical inner cylinder 1.14 of the air duct 1.11 is connected. The upper side of the side wall of the air outlet duct 1.11 is fixed to the right end of the guide tube 1.3 through a bracket. The guide tube 1.3 is parallel to the central axis of the conical inner cylinder 1.14. The air duct memory is connected to the air duct. The old air duct interface 1.13 is the air duct interface between the already installed air duct and the air duct storage.

The distance L between the air outlet head of the air outlet tube 1.11 and the head of the coal wall is the position of the tunnel boring machine.

The main body of the tapered inner cylinder 1.14 is a normal cylinder and the end is a cone. The purpose is to facilitate the installation of the air duct.

The winch is a constant pressure winch, and the winch 1.8 of the winch is above the side wall of the air outlet tube 1.11;

The anchor rod is fixed on the tunnel wall, one end of the wire rope 1.1 is fixed on the anchor rod after passing through the guide pipe 1.3, and the other end of the wire rope 1.1 is wound around the winch 1.8 of the winch.

The air duct 1.6 is placed on the conical inner cylinder 1.14. There is a row of lifting holes 1.6.1 on the top of the air duct 1.6. Each hanging hole 1.6.1 is connected to a chain link 1.4 through a chain 1.5. The chain link 1.4 Put it on the guide tube 1.3 in turn.

There is a baffle at the junction of the conical inner cylinder 1.14 and the air outlet tube 1.11. The upper part of the baffle is a triangular protrusion. The conical inner cylinder 1.14, the air outlet tube 1.11 and the outer cylinder main body 1.10 are all fixed on the baffle plate. The front guard The cover 1.12 and the rear cover 1.7 are closed together with the outer barrel main body 1.10 to cover the conical inner barrel 1.14. The front guard 1.12, the rear guard 1.7, the outer barrel main body 1.10, and the left side of the conical inner barrel 1.14 are flush with each other. The shield 1.12 has a first upper flange with a row of round holes, the rear shield 1.7 has a second upper flange with a row of round holes, the first upper flange of the front shield 1.12 and the third upper flange of the rear shield 1.7 The two upper convex edges are connected by bolts passing through the round holes.

There is a through hole on the upper part of the baffle, and the right end of the guide tube 1.3 passes through the through hole and is fixed with the baffle.

A duct air volume meter 1.9 is installed on the air outlet tube 1.11.

A spring baffle 1.2 is fixedly installed on the left end of the front guard 1.12 (similar baffles already exist in the prior art, and of course elastic baffles of other structures can also be used), and a spring is fixedly installed on the left end of the rear guard 1.7 The stopper 1.2 and the two spring stoppers 1.2 are stuck at the tail of the guide tube 1.3. The purpose is to prevent the chain link 1.4 from easily detaching from the guide tube 1.3, and can only detach under the action of a large pulling force.

A method of using the automatic extension device of the coal mine air supply duct. When the crawler vehicle 3 moves forward through manual on-site remote control or remote control, the chain link 1.4 on the guide pipe 1.3 sequentially breaks free from the limit of the spring block 1.2, and the wind The air duct corresponding to the loosened chain link 1.4 of the barrel 1.6 extends out of the air duct memory 1 in sequence, and the loosened chain link 1.4 is put on the steel wire rope 1.1 to keep the air duct 1.6 in a straightened state and complete the automatic extension of the air duct; When the crawler vehicle 3 stops moving, the spring block 1.2 blocks in front of the chain link 1.4, restricting the chain link 1.4 from breaking away from the spring block 1.2.

An automatic extension device for a coal mine air supply blower mainly consists of a blower storage, a lifting platform and a narrow crawler vehicle.

The air duct storage is arranged on the narrow crawler through the lifting platform. In order not to affect the normal operation of other operating equipment in the tunnel, the air duct storage, lifting platform and narrow crawler are designed to be as narrow as possible ( The width of the crawler vehicle is less than or equal to the width of the air duct) and is arranged on one side of the tunnel, directly below the air outlet of the air supply duct.

When the tunnel boring machine starts the tunneling operation, as the tunnel boring machine moves forward, manual on-site remote control or remote control crawler vehicle moves forward, and the air duct of the air duct stocker automatically extends. Realize the excavation and extension of the air duct and automatic extension stretch.

Work process

Coil a certain amount of wire rope on the constant pressure winch winch, and pass the wire rope through the guide tube in the air cylinder storage;

Install links and chains on all lifting holes of a certain amount of air ducts in advance;

Open the rear guard and front guard 180 degrees around the axis of rotation, tightly fit all the air ducts on the tapered inner cylinder of the air duct storage device, and set all the links on the guide tube in order; , close the front guard around the rotating shaft, and install the fixing bolts.

Installing an air volume testing device in the air outlet section of the air duct memory can realize real-time online display of the air volume at the outlet of the air duct.

Install the air duct storage device on the crawler vehicle through the lifting platform; the crawler vehicle is on one side of the tunnel, directly below the air outlet of the air supply fan; the lifting platform adjusts the air duct storage device and the tunnel airflow according to the height of the tunnel and the height of the air duct. The barrel height is consistent.

Fix one end of the wire rope to the nearest tunnel leakage anchor head; adjust the pressure of the constant pressure winch motor to the constant pressure state through the pump station to keep the wire rope straight and ensure that the hanging extended air duct is also straight Condition, not droopy.

After the tunnel boring machine starts to move forward, the manual on-site remote control or remote control crawler vehicle moves forward a certain distance, the chain link on the guide pipe breaks free of the spring stopper, and the air duct in the air duct memory automatically moves outward. Extend; after the crawler vehicle stops moving, the spring block blocks in front of the chain link, restricting the air duct of the air duct storage device from extending outward.

After the chain link extending out of the hair dryer leaves the guide tube, it is naturally placed on the steel wire rope, realizing automatic hanging of the extending hair dryer.

After the tunnel boring machine completes a cutting operation cycle, the wire rope is manually fixed to the nearest anchor rod near the air duct storage device; the next tunnel boring machine cutting operation cycle begins.

When all the air ducts in the air duct memory are extended, a certain amount of spare parts will be stored in the air duct memory and replaced, and the next excavation operation cycle will continue.

Claims

An automatic extension device for coal mine air supply ducts, which is characterized by: including

The crawler vehicle (3) has a lifting platform (2) on the crawler vehicle (3);

The hairdryer memory (1) includes an air outlet tube (1.11), a conical inner tube (1.14), an outer tube main body (1.10), a front shield (1.12), and a rear shield. (1.7), the rear guard (1.7) and the rear top of the outer cylinder body (1.10) are rotationally connected through the air cylinder storage shaft (1.15), and the front guard (1.12) and the front top of the outer cylinder body (1.10) are connected through The rotating shaft (1.15) of the air duct storage device is rotationally connected, the bottom of the outer cylinder body (1.10) is fixed on the lifting platform (2), and the right end of the air duct storage device (1) is provided with an air outlet (1.11). The storage device (1) is provided with a tapered inner cylinder (1.14) that communicates with the air outlet tube (1.11). The top of the side wall of the air outlet tube (1.11) is fixed to the right end of the guide tube (1.3), and the guide tube (1.3) Parallel to the central axis of the tapered inner cylinder (1.14), a spring block (1.2) is fixedly installed on the left end of the front guard (1.12), and a spring block (1.2) is fixedly installed on the left end of the rear guard (1.7). Both spring blocks (1.2) are stuck at the tail of the guide tube (1.3);

The winch is a constant pressure winch, and the winch (1.8) of the winch is located above the side wall of the air outlet tube (1.11);

Anchor rod, the anchor rod is fixed on the tunnel wall, one end of the steel wire rope (1.1) is fixed on the anchor rod, and the other end of the steel wire rope (1.1) is wound on the winch (1.8) of the winch;

The air duct (1.6) is placed on the tapered inner cylinder (1.14). A row of lifting holes (1.6.1) is provided on the top of the air duct (1.6). Each hanging hole (1.6.1) passes through a A chain (1.5) is connected to a link (1.4), and the link (1.4) is put on the guide tube (1.3) in turn.
An automatic extension device for coal mine air supply ducts according to claim 1, characterized in that: there is a baffle at the junction of the conical inner cylinder (1.14) and the air outlet duct (1.11), and the conical inner cylinder (1.14), The air outlet tube (1.11) and the main body of the outer tube (1.10) are both fixed on the baffle. When the front guard (1.12) and the rear guard (1.7) are closed, they work together with the main body of the outer tube (1.10) to secure the conical inner tube (1.14 ) cover, the front guard (1.12), rear guard (1.7), outer cylinder body (1.10), and tapered inner cylinder (1.14) are flush with each other on the left side. The front guard (1.12) has a row of round holes. The first upper flange, the rear guard (1.7) has a second upper flange with a row of round holes, the first upper flange of the front guard (1.12) and the first upper flange of the rear guard (1.7) Connected by bolts passing through round holes.
An automatic extension device for coal mine air supply ducts according to claim 2, characterized in that: there is a through hole on the upper part of the baffle, and the right end of the guide tube (1.3) passes through the through hole and is fixed to the baffle.
An automatic extension device for coal mine air supply ducts according to claim 1, characterized in that: a duct air volume meter (1.9) is installed on the air outlet duct (1.11).
A method of using the automatic extension device of the coal mine air supply duct described in claim 1, which is characterized in that At:

When the crawler vehicle (3) moves forward, the chain link (1.4) on the guide tube (1.3) breaks free of the spring stopper (1.2) in turn, and the air duct (1.6) breaks free of the chain link (1.4) The corresponding air ducts extend out of the air duct memory (1) in sequence, and the freed chain link (1.4) is put on the steel wire rope (1.1) to keep the air duct (1.6) in a straightened state, completing the automatic extension of the air duct; When the crawler vehicle (3) stops moving, the spring block (1.2) blocks in front of the chain link (1.4), restricting the chain link (1.4) from breaking away from the spring block (1.2).
A method of using an automatic extension device for coal mine air supply ducts according to claim 5, characterized in that: when all the ducts (1.6) in the duct storage (1) are extended, the rear guard is (1.7), open the front guard (1.12) around the axis of rotation (1.15), set the other air duct (1.6) on the conical inner cylinder (1.14) of the air duct storage device, and install the other wire rope (1.1) And fixed on another anchor rod, the multiple chain links (1.4) of the other air duct are set on the guide pipe (1.3) in order, and at the same time, the other air duct (1.6) is connected to the installed air duct. The tube (1.6) and the air outlet tube (1.11) are connected, close the rear guard (1.7) and front guard (1.12) around the rotating axis, and install the fixing bolts; continue with the next operation.