Gravity Rotary Gas Drainage Pipeline Automatic Slag and Water Discharge Device

Abstract

The present invention discloses a gravity-rotating type automatic slag and water discharging device for gas drainage pipelines, which is arranged on the coal mine gas drainage pipeline. It includes a water and slag storage container, and a slag and water discharging structure and a gravity control unit are arranged in the inner cavity of the water and slag storage container. The slag and water discharging structure includes an impeller rotating shaft arranged in the water and slag storage container. The impeller rotating shaft is a unidirectional rotating shaft, and a rotating impeller is fixedly arranged on the impeller rotating shaft. A roller is arranged at the front end of the blade of the rotating impeller, and the roller rolls on the inner wall of the water and slag storage container. The gravity control unit controls the rolling of the roller. The present invention makes up for the deficiencies of the existing manual water discharging device with high working intensity and the defects in the design of the existing automatic water discharging device, and realizes the automatic water and slag discharging of the drainage pipeline.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine gas drainage, and relates to a gravity-rotating type automatic slag and water discharging device for gas drainage pipelines. Background Art

[0002] Coal mine gas drainage is one of the basic means for gas control. When negative pressure drainage is adopted, a large amount of water and slag in the boreholes may be sucked into the drainage pipeline, causing pipeline blockage and affecting the drainage effect. Therefore, Article 5.2.9 of the "Design Standard for Coal Mine Gas Drainage Engineering" (GB 50471-2018) stipulates that the following requirements should be met for the accessory devices and facilities of the drainage pipeline: "2. Drainage devices should be installed at drill sites, vertical pipe bends, low-lying areas, and places with sudden temperature changes, with a spacing of 500m to 800m, and the maximum not exceeding 1000m. 3. Slag removal devices should be installed at appropriate positions on the pipeline." Currently, the commonly used slag and water discharging devices in mines are manual and automatic types. Among them, the manual slag and water discharging device mainly discharges by workers opening the gate valve, which is labor-consuming and inefficient; the automatic slag and water discharging device mainly triggers the switch to automatically discharge slag and water by setting a buoyancy ball in the container, and when the water in the container is less and there is more slime and coal slag, the slime and coal slag exceed the height of the buoyancy ball, and the switch cannot be triggered to achieve automatic slag and water discharge. Summary of the Invention

[0003] The purpose of the invention is to provide a gravity-rotating type automatic slag and water discharging device for gas drainage pipelines in coal mines, which overcomes the defects of low efficiency of current manual regulation of slag and water discharge and difficulty in automatically discharging slag and water when there is more slime and coal slag in the float type water discharging device.

[0004] The technical solution adopted by the invention is that the gravity-rotating type automatic slag and water discharging device for gas drainage pipelines is arranged on the coal mine gas drainage pipeline, and includes a water and slag storage container. A slag and water discharging structure and a gravity control unit are arranged in the inner cavity of the water and slag storage container. The slag and water discharging structure includes an impeller rotating shaft arranged in the water and slag storage container. The impeller rotating shaft is a one-way rotating shaft, and a rotating impeller is fixedly arranged on the impeller rotating shaft. A roller is arranged at the front end of the blade of the rotating impeller, and the roller rolls on the inner wall of the water and slag storage container. The gravity control unit controls the rolling of the roller.

[0005] The characteristics of the invention also lie in that

[0006] The water and slag storage container is provided with a water inlet and a water outlet. The water inlet is located directly above the impeller rotating shaft of the rotating impeller. The water inlet of the water and slag storage container is communicated with the coal mine gas drainage pipeline, and the water outlet is located at the bottom of the water and slag storage container.

[0007] The gravity control unit includes a clamping groove opened on the inner wall of the slag storage container. A spring is arranged in the clamping groove. One end of the spring is fixed in the clamping groove, and the other end is fixed with a steel ball. The steel ball is located outside the clamping groove and on the moving track of the roller. When the roller moves to and contacts the steel ball, the spring is compressed due to the gravity of the slag mixture carried on the rotating impeller blades.

[0008] The rotating impeller is provided with three blades, and the included angle between two adjacent blades is 120°. The blades of the rotating impeller are arc-shaped from the root to the front end.

[0009] The inner cavity of the slag storage container is a cylinder, and the inner cavity of the cylindrical container is coaxially arranged with the rotating impeller. The shape and size of the inner cavity are adapted to the rotating impeller provided with rollers.

[0010] The inner wall of the slag storage container is sprayed with an anti-adhesion and anti-static coating.

[0011] The surface of the rotating impeller is sprayed with an anti-adhesion and anti-static coating.

[0012] The beneficial effects of the present invention are as follows:

[0013] The gravity-rotating type automatic slag and water discharging device for gas drainage pipelines of the present invention has a simple structure and is convenient to use, and can be widely applied to the field of coal mine gas drainage; by using the gravity of the slag mixture within two blades of the rotating impeller to act on the gravity control unit, the rotation and stop of the rotating impeller are controlled, realizing the automatic discharge of slag. At the same time, the rotating impeller is provided with three blades to ensure the sealing of the slag and water discharging device; the slag and water discharging device of the present invention overcomes the defects of low efficiency of current manual regulation of slag and water discharge and difficulty in automatic slag and water discharge when there is a large amount of coal mud and coal slag in the float-type water discharging device, and can effectively solve the problem of water accumulation in the gas drainage pipeline, ensuring the safe and efficient gas drainage in the mine. Description of the Drawings

[0014] Figure 1 is the front view of the gravity-rotating type automatic slag and water discharging device for gas drainage pipelines of the present invention;

[0015] Figure 2 is the side sectional view of the gravity-rotating type automatic slag and water discharging device for gas drainage pipelines of the present invention;

[0016] Figure 3 is the schematic diagram of the slag storage container in the gravity-rotating type automatic slag and water discharging device for gas drainage pipelines of the present invention;

[0017] Figure 4 is the schematic diagram of the slag and water discharging structure in the gravity-rotating type automatic slag and water discharging device for gas drainage pipelines of the present invention;

[0018] Figure 5It is a schematic structural diagram of the gravity control unit in the gravity-rotating type automatic slag and water discharging device for coal mine gas drainage pipelines of the present invention;

[0019] Figure 6 is a schematic working diagram of the gravity-rotating type automatic slag and water discharging device for coal mine gas drainage pipelines of the present invention. Among them, Figure 6(a) is a state diagram of the water and slag mixture converging between the blades, Figure 6(b) is a state diagram when the blades drive the water and slag mixture to rotate, and Figure 6(c) is a state diagram when the water and slag mixture is discharged.

[0020] In the figure, 1. Water and slag storage container; 2. Slag and water discharging structure; 3. Gravity control unit; 4. Water inlet; 5. Drainage port; 6. Container inner cavity; 7. Rotating impeller; 8. Impeller rotating shaft; 9. Roller; 10. Card slot; 11. Spring. Specific embodiments

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] The gravity-rotating type automatic slag and water discharging device for coal mine gas drainage pipelines of the present invention, as Figure 1-2 shown, is arranged on the coal mine gas drainage pipeline through a tee, and includes a water and slag storage container 1. A slag and water discharging structure 2 and a gravity control unit 3 are arranged in the container inner cavity 6 of the water and slag storage container 1.

[0023] The water and slag storage container 1, as an accessory device of the drainage pipeline, temporarily stores a certain amount of water and slag. As Figure 3 shown, the container inner cavity 6 of the water and slag storage container 1 is a cylinder, and the container diameter is determined according to the specification model of the coal mine gas drainage pipeline. The cylindrical container inner cavity 6 and the rotating impeller 7 are coaxially arranged, and the shape and size of the container inner cavity 6 are adapted to the rotating impeller 7 provided with rollers 9. The top of the water and slag storage container 1 is provided with a water inlet 4 and a drainage port 5. The water inlet 4 serves as the channel for the water and slag to enter and is located directly above the impeller rotating shaft 8 of the rotating impeller 7. The water inlet of the water and slag storage container 1 is connected to the tee of the coal mine gas drainage pipeline, so that the water and slag storage container 1 is communicated with the coal mine gas drainage pipeline. The drainage port 5 is located at the bottom of the water and slag storage container 1 and is used to discharge the water and slag mixture in the container. The inner wall of the water and slag storage container 1 is sprayed with an anti-adhesion and anti-static coating to avoid the adhesion of water and slag to the inner wall, which is not conducive to slag discharge, and at the same time prevent static electricity.

[0024] The slag and water discharging structure 2 realizes self-rotating slag and water discharging through the rotation of the impeller. As Figure 4As shown in the figure, it includes an impeller rotating shaft 8 arranged in a slag storage container 1. The impeller rotating shaft 8 is a unidirectional rotating shaft. A rotating impeller 7 is fixedly arranged on the impeller rotating shaft 8. The rotating impeller 7 is provided with three blades, namely blade A, blade B and blade C. The included angle between two adjacent blades is 120°. The blades of the rotating impeller 7 are arc-shaped from the root to the front end. The blades block the water inlet 4 and the drain outlet 5 of the slag storage container 1, preventing the extraction system from inhaling air through the automatic slag discharging and water draining device, ensuring the extraction concentration and extraction efficiency. A roller 9 is arranged at the front end of the blade of the rotating impeller 7. The roller 9 rolls on the inner wall of the slag storage container 1. The gravity control unit 3 controls the rolling of the roller 9. The surface of the rotating impeller 7 is sprayed with an anti-adhesion and anti-static coating to prevent the slag from adhering to the impeller and being unfavorable for slag discharging.

[0025] The gravity control unit 3 utilizes the gravity of the slag-water mixture within the two blades of the slag discharging and water draining structure 2 acting thereon to control the rolling of the roller 9, thereby controlling the rotation and stop of the rotating impeller 7. As Figure 5 shown in the figure, the gravity control unit 3 includes a card slot 10 opened on the inner wall of the slag storage container 1. The card slot 10 is located in the upper part of the slag storage container 1. A spring 11 is arranged in the card slot 10. One end of the spring 11 is fixed in the card slot 10, and the other end is fixed with a steel ball. The steel ball is located outside the card slot 10 and on the moving track of the roller 9. When the roller 9 moves to and contacts the steel ball, the spring 11 is compressed due to the gravity of the slag-water mixture carried on the blade of the rotating impeller 7. When the gravity of the slag-water mixture reaches the limit value of the gravity control unit 3, that is, the spring compression makes the steel ball located within the card slot 10, the rotating impeller 7 rotates 120°, and the slag-water mixture completes slag discharging. After the rotating impeller 7 rotates, the spring 11 bounces up, and the steel ball abuts against the next blade to fix the rotating impeller 7, and so on.

[0026] The design and working process of the gravity-rotating type automatic slag discharging and water draining device for gas extraction pipelines of the present invention (as shown in Figure 6, where A, B, and C in Figure 6 are blade A, blade B, and blade C respectively) are specifically as follows:

[0027] Step 1, establish an algorithm model for automatic slag discharging and water draining of gravity-rotating type gas extraction pipelines through theoretical analysis;

[0028] Step 2, based on the model, set a gravity control unit 3 with a suitable specification according to the specification model of the gas extraction pipeline. The steel ball of the gravity control unit 3 abuts against the roller 9 at the front end of the blade of the rotating impeller 7, and the included angle between blade A and blade B is aligned with the water inlet 4 of the slag storage container 1;

[0029] Step 3, the slag-water mixture carried in the gas extraction pipeline passes through a tee and converges between blade A and blade B through the water inlet 4 of the slag storage container 1, as shown in Figure 6(a). The slag-water mixture is mainly carried by blade B;

[0030] Step 4, when the weight of the water slag mixture between vane A and vane B exceeds the set value, the roller at the top of vane B compresses the spring 11 of the gravity control unit 3. As shown in Fig. 6(b), the steel ball is compressed into the card slot 10, and the rotating impeller 7 automatically rotates 120°. After rotation, as shown in Fig. 6(c), the angle between vane A and vane B is aligned with the water outlet, and the release of the water slag mixture is completed;

[0031] Step 5, when the weight of the water slag mixture between vane A and vane B is removed, the steel ball pops out to prevent vane A from rotating. Vane C is aligned with the water inlet 4 to continue to admit the water slag mixture. In this way, the slag discharge and water drainage are carried out repeatedly.

[0032] As can be seen from the above, for the gravity-rotating type automatic slag and water discharger for gas drainage pipelines of the present invention, the theory of gravity self-rotation discharge of water slag in gas drainage pipelines is analyzed and a model is established, and water slag mixtures with any proportion can meet the requirements; according to the specification model of the drainage pipeline and the water slag discharge frequency at the drilling position, gravity control units 3 of different specifications can be selected; through the gravity control unit 3 of the water slag mixture discharged from the drainage pipeline, automatic rotation discharge is completed without manual intervention; after the weight of the water slag mixture is removed, the steel ball of the gravity control unit 3 pops out to fix the rotating vane and ensure the rotation angle; three impellers are provided. No matter how they rotate, two impellers are aligned with the water inlet and two impellers are aligned with the water outlet to ensure the stable and reliable operation of the slag discharge and water drainage system; rollers 9 are provided at the front end of the vane to ensure that the rotating impeller 7 rotates in rolling contact with the inner wall of the water slag storage container 1 to ensure the airtightness of the drainage system; the inner cavity of the water slag storage container 1 and the rotating impeller are both treated by spraying process to avoid adhesion of water slag to the impeller and prevent static electricity generation.

[0033] The gravity-rotating type automatic slag and water discharger for gas drainage pipelines of the present invention has the characteristics of active slag discharge, gravity control, safety and reliability, and strong sealing performance, making up for the deficiencies of the existing manual water discharger with high working intensity and the existing defects in the design of automatic water dischargers. It can be widely applied to the field of coal mine gas drainage. Through the development and application of this achievement, automatic water drainage of the drainage pipeline is realized, with good economic benefits.

Claims

1. Gravity-rotating type automatic slag and water discharging device for gas drainage pipeline, which is installed on the gas drainage pipeline in coal mines, and is characterized in that It includes a slag water storage container (1). A slag discharging and water draining structure (2) and a gravity control unit (3) are arranged in the container inner cavity (6) of the slag water storage container (1). The slag discharging and water draining structure (2) includes an impeller rotating shaft (8) arranged in the slag water storage container (1). The impeller rotating shaft (8) is a unidirectional rotating shaft. A rotating impeller (7) is fixedly arranged on the impeller rotating shaft (8). A roller (9) is arranged at the front end of the blade of the rotating impeller (7). The roller (9) rolls on the inner wall of the slag water storage container (1). The gravity control unit (3) controls the rolling of the roller (9). The gravity control unit (3) includes a clamping groove (10) opened on the inner wall of the slag water storage container (1). The clamping groove (10) is located in the upper part of the slag water storage container (1). A spring (11) is arranged in the clamping groove (10). One end of the spring (11) is fixed in the clamping groove (10), and the other end is fixed with a steel ball. The steel ball is located outside the clamping groove (10), and the steel ball is located on the moving track of the roller (9). When the roller (9) moves to and contacts the steel ball, the spring (11) is compressed due to the gravity of the slag water mixture carried on the blade of the rotating impeller (7).

2. The automatic slag and water discharging device for a gravity-rotating gas drainage pipeline according to claim 1, characterized in that The slag water storage container (1) is provided with a water inlet (4) and a drain outlet (5). The water inlet (4) is located directly above the impeller rotating shaft (8) of the rotating impeller (7). The water inlet of the slag water storage container (1) is communicated with the coal mine gas drainage pipeline. The drain outlet (5) is located at the bottom of the slag water storage container (1).

3. The automatic slag and water discharging device for a gravity-rotating gas drainage pipeline according to claim 1, characterized in that, The rotating impeller (7) is provided with three blades, and the included angle between two adjacent blades is 120°. The blades of the rotating impeller (7) are arc-shaped from the root to the front end.

4. The gravity-rotating type automatic slag and water discharging device for gas drainage pipelines according to claim 1, wherein The container inner cavity (6) of the slag water storage container (1) is a cylinder. The container inner cavity (6) and the rotating impeller (7) are coaxially arranged. The shape and size of the container inner cavity (6) are adapted to the rotating impeller (7) provided with the roller (9).

5. The automatic slag and water discharging device for the gravity-rotating gas drainage pipeline according to claim 1, wherein The inner wall of the slag water storage container (1) is sprayed with an anti-adhesion and anti-static coating.

6. The automatic slag and water discharging device for the gravity-rotating gas drainage pipeline according to claim 1, wherein The surface of the rotating impeller (7) is sprayed with an anti-adhesion and anti-static coating.

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