Coal receiving and sampling device at air slag discharging hole opening

Abstract

The utility model relates to the technical field of coal mining and coal mine safety, in particular to a coal receiving and sampling device for an air slag discharging hole. Comprising a barrel body and a filtering covering film, the caliber of the front end of the barrel body is smaller than that of the rear end of the barrel body, the barrel body is provided with an air outlet, and the air outlet is covered with the filtering covering film. According to the technical scheme, the sampling efficiency can be improved, dust at the orifice can be reduced, and the operation process is safer and more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining and coal mine safety, in particular to a coal sampling device for an air slag discharge hole. Background Art

[0002] At present, coal mining is mostly done underground, and the possibility of accidents increases with the increase in mining depth. This problem is more serious for gas mines, high-gas mines or outburst mines. Therefore, during mine excavation or mining, in order to ensure the safe operation, it is necessary to accurately measure the gas parameters of the coal seam or a certain area, usually by sampling the coal at the air discharge hole to test the content.

[0003] However, the traditional method of directly collecting coal powder at the orifice with a bag has great safety hazards and is dusty. Therefore, there is an urgent need for a safe and reliable, simple-structured and efficient device to collect coal and sample at the air slag discharge orifice.

[0004] Currently, there is a utility model patent technology with the announcement number CN203811413U, which discloses a portable coal sample collection device, which utilizes a cylindrical feed pipe composed of two semi-cylindrical tube bodies, a sealing baffle is arranged at the end of the cylindrical feed pipe to form a closed device, and a coal powder discharge port is arranged on the cylindrical feed pipe, and the coal powder discharge port is connected to the coal sample tank through a connecting pipe to collect the coal slag blown in by high-pressure wind.

[0005] However, the prior art still has the following problems: only a circular hole is provided in the center of the sealing baffle, and the high-pressure air cannot be discharged efficiently after entering the closed device, which easily forms air pressure inside the device and hinders the subsequent high-pressure air from entering, thereby not only reducing the sampling efficiency, but also easily causing coal sample dust to overflow into the air, causing safety problems. Utility Model Content

[0006] The technical problem solved by the utility model is to provide a coal sampling device at the air slag discharge orifice, which can not only improve the sampling efficiency but also reduce orifice dust, making the operation process safer and more reliable.

[0007] In order to solve the above problems, the utility model provides a basic solution: including a barrel body and a filter membrane, the front end diameter of the barrel body is smaller than the rear end diameter, the barrel body is provided with an exhaust port, and the exhaust port is covered by the filter membrane.

[0008] Beneficial effects of the basic solution: This technical solution allows high-pressure air to enter from the small-diameter front end and be contained in the large-diameter part at the rear end, which can more effectively avoid the formation of air pressure inside the container and avoid reducing the sampling efficiency. After entering the device, the high-pressure air is quickly discharged through the exhaust port, which improves the air outlet efficiency of the device and avoids the formation of air pressure in the barrel, ensuring smooth sampling. At the same time, the filter coating can block the coal sample dust from being blown to the outside by the high-pressure wind, prevent the coal sample from overflowing, reduce external dust, and ensure the safety and comfort of the operation without affecting the sampling efficiency.

[0009] As a preferred embodiment, the barrel body comprises an upper barrel body and a lower barrel body, and the upper barrel body and the lower barrel body are connected and closed by hinges and locks.

[0010] This technical solution makes it easy to open the upper and lower parts to complete the installation of the drill hole when drilling is needed, avoiding excessive friction between the drill rod and the sampling device when installing the drill rod. The provision of hinges and locks can also ensure the tightness and stability of the combination of the two parts.

[0011] As a preferred solution, the barrel body is further provided with a sampling port, which is located in the lower half of the barrel body and is connected to a sample storage container.

[0012] This technical solution, by setting a lower sampling port, allows the coal sample to fall into the sample storage container through the lower gap under the influence of gravity, and finally completes the sampling.

[0013] As a preferred solution, the front end and the rear end of the barrel body are both provided with circular holes, and the circular holes are penetrated by a drill rod.

[0014] This technical solution, by setting circular holes at the front and rear ends of the barrel body for the drill rod to pass through, can cover the hole opening before the sampling device drill rod is operated, avoiding the problem of a large amount of dust entering the air during the interval time in the traditional solution of drilling a hole first and then covering the sampling device.

[0015] As a preferred solution, bearings are provided between the drill rod and the front circular hole of the barrel body and between the drill rod and the rear circular hole of the barrel body.

[0016] This technical solution avoids safety hazards caused by friction between the drill rod and the sampling device during the drilling process by contacting the bearing with the drill rod.

[0017] As a preferred solution, the bearings are connected to the barrel body through a bracket, and the bracket at the front end of the barrel body is a hollow bracket.

[0018] In this technical solution, the coal sample blown out of the borehole with the high-pressure wind enters the interior of the barrel through the front end of the sampling device. The front end adopts a hollow design, which increases the flow rate of high-pressure wind entering while fixing the bearing to support the drill rod, thereby improving the sampling efficiency. In addition, the efficient entry of high-pressure wind into the barrel can also reduce the coal sample dust overflowing from the orifice, making the operation process safer and more comfortable.

[0019] As a preferred solution, the outer rings of the bearings are processed with grooves, and the bearings are embedded in the bracket through the grooves.

[0020] This technical solution makes the bracket and the bearing more firmly combined, improves the stability of the overall structure of the sampling device, and also facilitates subsequent maintenance and replacement.

[0021] As a preferred solution, the filter membrane is cotton yarn.

[0022] This technical solution uses cotton yarn as a filter coating, which is low-cost. At the same time, when the high-pressure airflow passes through the cotton yarn, it will rub the surface of the cotton yarn to generate static electricity, and smaller coal-like dust can also be effectively blocked.

[0023] As a preferred solution, the sample storage container is a coal sample bag.

[0024] The technical solution adopts coal sample bags which are low in cost, light in weight, small in size after folding, and easy to carry; at the same time, the coal sample bags also have a certain ductility, and can be stored normally when a large amount of coal samples is stored.

[0025] As a preferred solution, two symmetrical handles are fixedly connected to the side of the barrel body.

[0026] Furthermore, two symmetrical handles are fixedly connected to the side of the barrel body.

[0027] The technical solution can be used to control the sampling device to always align with the orifice by holding the handle during operation, thereby ensuring that the sampling process proceeds smoothly.

[0028] As a preferred solution, the lower half barrel is provided with a supporting device.

[0029] This technical solution facilitates fixing the sampling device during sampling, and also provides certain support, thereby reducing the labor intensity of the sampling work. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the first embodiment of the utility model;

[0031] Figure 2 It is a top view of the utility model;

[0032] Figure 3 It is a sectional view of the front end of the barrel body of the utility model. DETAILED DESCRIPTION

[0033] The technical solution of this application is further described in detail below through specific implementation methods:

[0034] The marks in the drawings of the specification include: barrel body 1, filter membrane 2, drill rod 3, drill bit 4, bearing 5, groove 6, hollow bracket 7, handle 8, rear end bracket 9, sample storage container 10, lock 11, hinge 12, upper barrel body 13, lower barrel body 14.

[0035] Embodiment 1

[0036] like Figure 1 As shown, a coal sampling device for receiving an air slag discharge hole includes a barrel body 1 and a filter membrane 2. The diameter of the front end of the barrel body 1 is smaller than that of the rear end, and is preferably a truncated cone, so that high-pressure air enters from the small-diameter part and is contained in the large-diameter part, which can more effectively avoid the formation of air pressure inside the container; the barrel body 1 includes an upper barrel body 13 and a lower barrel body 14. When sampling is required, the upper barrel body 13 and the lower barrel body 14 of the sampling device are connected by a hinge 12, and the lock 11 is closed after the drill rod 3 is placed between the upper barrel body 13 and the lower barrel body 14.

[0037] The barrel body 1 is also provided with an exhaust port. As a preferred implementation scheme, the exhaust port is arranged on the side of the upper barrel body 13 in a rectangular shape. After the high-pressure air enters the device, the airflow is more likely to be quickly discharged upward through the exhaust port, thereby improving the air outlet efficiency of the device. The exhaust port is covered by the filter membrane 2. The filter membrane 2 has tiny gaps that can exhaust air and block coal slag. The exhaust port is set to be rectangular, which can make full use of the raw materials of the filter membrane 2, reduce costs and avoid waste.

[0038] like Figure 2 The exhaust port is preferably sealed with cotton yarn, which is used as a filter film 2, and has low cost. When the high-pressure airflow passes through the cotton yarn, it will rub the surface of the cotton yarn to generate static electricity, and smaller coal-like dust can also be effectively blocked. Cotton yarn with adhesive strips on the edge is preferred, which is convenient for quick fixation during assembly and easy to disassemble and replace, so as to avoid coal-like dust blocking the gaps in the cotton yarn and reducing the air outlet efficiency; accordingly, Velcro can also be set on the edge of the exhaust port, and the cotton yarn can be directly and repeatedly pasted on the upper notch for quick replacement.

[0039] The barrel body 1 is also provided with a sampling port, which is arranged in the lower half of the barrel body 14, so that the coal sample falls into the sample storage container 10 through the lower notch under the influence of gravity, which is convenient for sampling. The sampling port is connected to the sample storage container 10, and the sample storage container 10 is preferably a coal sample bag. The coal sample bag has the characteristics of light weight and small volume after folding, which is easy to carry; at the same time, the coal sample bag also has a certain ductility, and can be stored normally when storing a little more coal samples. The coal sample bag used in the sample storage device can also be selected in different sizes to meet the sampling work of different capacities. Velcro is also preferably provided on the edge of the sampling port to facilitate the connection with the coal sample bag. Before the sampling device works, it should ensure that it is tightly connected with the barrel body 1 to prevent dust from overflowing from the gap. When sampling, the size of the coal sample bag should ensure that it touches the ground as much as possible, and reduce the tension on the connection under the action of the ground support force to ensure a tight connection; in addition, a small hook can be provided to hang the coal sample bag on the small hook, which is not easy to fall off.

[0040] The front and rear ends of the barrel body 1 are provided with circular holes, the diameter of the circular holes is slightly larger than the diameter of the drill rod 3, and the front and rear circular holes should be on the same horizontal line to facilitate the placement of the drill rod 3. Bearings 5 ​​are provided between the drill rod 3 and the front circular hole of the barrel body 1 and between the drill rod 3 and the rear circular hole of the barrel body 1. After the upper barrel body 13 and the lower barrel body 14 are opened, the drill rod 3 is placed in the front and rear circular holes to directly contact the bearings 5, and is connected to the motor through the rear circular hole. The drill bit 4 inside the drill rod 3 is used to directly perform drilling operations through the front circular hole, and the friction between the drill rod 3 and the sampling equipment is reduced to ensure the safety of the sampling process.

[0041] The bearings 5 ​​are connected to the barrel body 1 through a bracket. The front end bracket of the barrel body 1 is a hollow bracket 7. The size of the hollow gap should be appropriately larger than the size of the coal sample to ensure that the coal sample enters the barrel body 1 efficiently; the rear end bracket 9 is a solid material, preferably iron plate as the material, with a solid structure, strong airtightness, and durability.

[0042] like Figure 3 As shown, the outer ring of the bearing 5 at the front end of the barrel body is processed with a groove 6, and the bearing 5 at the rear end of the barrel body also has a groove 6, and the bearing 5 is embedded in the bracket through the groove 6. The two are combined more firmly. Preferably, the bearings 5 ​​at the front and rear ends of the barrel body 1 can be welded and fixed on the bracket in advance to further improve the stability of the combination of the two.

[0043] like Figure 2 As shown, two symmetrical handles 8 are also provided on the side of the barrel body 1, and the handles are fixedly connected to the side of the barrel body 1, preferably by welding. The handles 8 are convenient for holding during operation, convenient for controlling the sampling device, ensuring the stability of the sampling device, and ensuring that the sampling device can effectively cover the openings on the coal wall or rock wall, ensuring that the sampling process proceeds smoothly.

[0044] Specific working process:

[0045] Before the operation, first open the lock 11, separate the upper half barrel 13 of the barrel 1 from the lower half barrel 14, prevent the drill rod 3 from being in the front and rear two round holes, then close the lock 11, use the front end of the barrel 1 to cover the hole, hold the handles 8 on both sides of the barrel 1 with both hands, and then use pneumatic drilling. The wind will blow the powdered or granular coal sample into the device, and the wind will be discharged through the cotton yarn, and the coal sample will fall directly into the coal sample bag. Finally, put the coal sample in the coal sample bag into the coal sample tank. The whole process is simple to operate and very safe.

[0046] Embodiment 2

[0047] The difference between this embodiment and the second embodiment is that a support device is provided at the lower end of the barrel body 1. Preferably, a foldable bracket is selected as the support device, which is convenient to carry when folded and can be unfolded to fix the sampling device during sampling, while providing certain support and reducing the labor intensity of sampling work. A set of hanging ears is also provided on the side of the bracket. In actual sampling, when the sampling device is unstable and difficult to control due to factors such as excessive high-pressure wind, the center of gravity can be stabilized by hanging heavy objects on the hanging ears.

[0048] The above are only embodiments of the utility model. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A coal sampling device for an air slag discharge orifice, characterized in that: It includes a barrel body and a filter membrane. The diameter of the front end of the barrel body is smaller than the diameter of the rear end. The barrel body is provided with an exhaust port, and the exhaust port is covered by the filter membrane. The barrel body includes an upper barrel body and a lower barrel body, and the upper barrel body and the lower barrel body are closed by hinges and locks.

2. The coal sampling device for the air slag discharge hole according to claim 1 is characterized in that: The barrel body is also provided with a sampling port, which is located in the lower half of the barrel body and is connected to a sample storage container.

3. The coal sampling device for the air slag discharge hole according to claim 2 is characterized in that: The front end and the rear end of the barrel body are both provided with circular holes, and the circular holes are penetrated by the drill rod.

4. The coal sampling device for air slag discharge orifice according to claim 3 is characterized in that: Bearings are arranged between the drill rod and the front circular hole of the barrel body and between the drill rod and the rear circular hole of the barrel body.

5. The coal sampling device for air slag discharge orifice according to claim 4, characterized in that: The bearings are connected to the barrel body through a bracket, and the bracket at the front end of the barrel body is a hollow bracket.

6. The coal sampling device for air slag discharge orifice according to claim 5, characterized in that: The outer rings of the bearings are processed with grooves, and the bearings are embedded in the bracket through the grooves.

7. The coal sampling device for the air slag discharge hole according to claim 6, characterized in that: The filter membrane is cotton yarn.

8. The coal sampling device for air slag discharge orifice according to claim 7, characterized in that: The sample storage container is a coal sample bag.

9. The coal sampling device for air slag discharge orifice according to claim 8, characterized in that: Two symmetrical handles are fixedly connected to the side of the barrel body.

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