A new type of breather valve for coal mill dynamic classifier

Abstract

The utility model relates to valve technical field, especially, a kind of novel breather valve for coal mill dynamic separator, including liquid recovery cylinder, upper cover, exhaust filter screen, communicating branch pipe, liquid recovery cylinder top is equipped with the upper cover of fixed connection, upper cover is equipped with exhaust pipe, exhaust pipe bottom end communicates liquid recovery cylinder inner chamber, and exhaust pipe top end is connected with exhaust filter screen;Liquid recovery cylinder side is equipped with liquid level meter, and the upper and lower ends of liquid level meter are communicated with liquid recovery cylinder inner chamber respectively;Liquid recovery cylinder bottom is equipped with the connecting pipe of fixed connection, and the connecting flange of fixed connection is equipped in communicating pipe bottom, and communicating pipe top extends to liquid recovery cylinder inner chamber, and its top end is equipped with breather valve, and the side connecting pipe of fixed connection is equipped in communicating pipe side, and side connecting pipe one end is communicated with communicating pipe, the utility model discloses through liquid recovery cylinder, exhaust filter screen, breather valve and liquid level meter, has realized liquid recovery loss prevention, gas high efficiency, liquid level monitoring, consumption reduction long life and less pollution.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a novel breather valve for a dynamic separator in a coal mill. Background Technology

[0002] The direct-fired pulverizing system of a medium-speed coal mill consists of a sealing air system, a lubrication oil system, a loading oil system, a dynamic-static combined rotary separator system, pipelines, and accessories. The dynamic-static combined rotary separator comprises a rotating rotor with vertically moving blades and coaxial stationary blades carrying a return powder cone. The rotary separator is driven by a motor and a single-stage reduction gear pair. The lubricating oil in the drive unit housing of the rotary separator is N320 with a filtration accuracy of 25μm.

[0003] The oil level in the separator housing should be the upper limit. The oil level should be checked and confirmed to be present during separator operation. The opening of the sealing air butterfly valve on the separator should be >45° during operation. This can be adjusted according to actual conditions; if the airflow is too high, the valve can be opened slightly; if the airflow is too low, the valve can be fully opened. The pressure difference ΔP between the primary air and the sealing air should be greater than 2 kPa. The sealing air should be kept open during separator start-up, shutdown, and operation.

[0004] However, due to the high-pressure sealing air and the high-speed rotating separator gears, the movement and air pressure carry away lubricating oil, resulting in excessive oil carryover in the breather valve. This causes the breather valve to intermittently spray large amounts of oil, leading to oil accumulation on the coal mill separator platform and surrounding equipment. This results in equipment and site pollution, environmental damage, fire hazards, and repetitive operation. Therefore, we propose a novel breather valve for dynamic coal mill separators to solve these problems. Utility Model Content

[0005] In view of this, in order to solve the problems existing in the technical background, this utility model proposes a novel breather valve for a dynamic separator in a coal mill. The specific technical solution is as follows:

[0006] A novel breather valve for a dynamic separator in a coal mill, according to an embodiment of the present invention, includes a liquid recovery cylinder, which is a cylindrical structure with openings at both ends. The top of the liquid recovery cylinder is provided with a fixedly connected upper cover, and an exhaust pipe is provided on the upper cover. The bottom end of the exhaust pipe is connected to the inner cavity of the liquid recovery cylinder, and the top end of the exhaust pipe is connected to an exhaust filter.

[0007] A level gauge is installed on one side of the liquid recovery cylinder, and the upper and lower ends of the level gauge are respectively connected to the inner cavity of the liquid recovery cylinder;

[0008] The liquid recovery cylinder is provided with a fixed connecting pipe at the bottom, and a fixed connecting flange at the bottom of the connecting pipe. The top of the connecting pipe extends into the inner cavity of the liquid recovery cylinder, and a breather valve is provided at its top. A fixed side connecting pipe is provided on one side of the connecting pipe. One end of the side connecting pipe is connected to the connecting pipe, and the other end of the side connecting pipe is provided with a threaded plug.

[0009] The two ends of the connecting branch pipe are respectively connected to the inner cavity of the liquid recovery cylinder and the side connecting pipe, and a valve is installed on the connecting branch pipe.

[0010] Furthermore, the liquid recovery cylinder is a cylindrical or conical cylinder.

[0011] Furthermore, the outer surface of the liquid recovery cylinder is provided with a heat insulation layer, which is made of high-temperature resistant ceramic fiber material and has a thickness of 5 to 10 mm.

[0012] Furthermore, the outer wall of the exhaust pipe is wrapped with a heat insulation sleeve, which is made of silicone.

[0013] Furthermore, the liquid recovery cylinder has a connecting hole on its top circumference, and the upper cover has a corresponding connecting hole on its circumference. The liquid recovery cylinder and the upper cover are connected by the connecting holes and connecting bolts.

[0014] Furthermore, the exhaust filter screen is provided with a connecting plate at the top, and support screws are respectively fitted on both sides of the connecting plate. The connecting plate and the support screws are detachably connected by nuts, and the bottom of each support screw is fixedly connected to the upper cover.

[0015] Furthermore, the side connecting pipe and the plug have a detachable threaded connection structure.

[0016] Furthermore, a drain pipe is provided at the bottom of the connecting pipe, the drain pipe is connected to the connecting pipe, and a ball valve is installed on the drain pipe.

[0017] The above technical solution has the following beneficial effects:

[0018] This device features a reasonable structural design. The liquid recovery cylinder effectively recovers liquids within the system, preventing damage from oily liquids and improving equipment safety. The exhaust filter and breather valve ensure smooth gas discharge, enhancing operational efficiency. Furthermore, the level gauge facilitates real-time monitoring of the cylinder's liquid level, allowing for timely handling of accumulated liquids and preventing oily spills. In addition, this device offers advantages such as reduced waste, long service life, clean exhaust, convenient maintenance, and reduced environmental pollution. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of a novel breather valve for a dynamic separator in a coal mill, according to this utility model. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of a novel breather valve for a dynamic separator in a coal mill, according to this utility model. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the internal structure of a novel breather valve for a dynamic separator in a coal mill, according to this utility model.

[0022] Figure label:

[0023] 1-Liquid recovery cylinder; 2-Upper cover; 3-Level gauge; 4-Connecting bolt; 5-Exhaust filter; 6-Support screw; 7-Connecting plate; 8-Connecting pipe; 9-Connecting flange; 10-Side connecting pipe; 11-Plug; 12-Connecting branch pipe; 13-Valve; 14-Breath valve; 15-Exhaust pipe; 16-Drain outlet; 17-Ball valve. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Referring to the attached drawings, a novel breather valve for a dynamic separator in a coal mill includes a liquid recovery cylinder 1, which is a cylindrical structure with openings at both ends. A fixedly connected upper cover 2 is provided at the top of the liquid recovery cylinder 1, and an exhaust pipe 15 is provided on the upper cover 2. The bottom end of the exhaust pipe 15 connects to the inner cavity of the liquid recovery cylinder 1, and the top end of the exhaust pipe 15 is connected to an exhaust filter 5. A level gauge 3 is installed on one side of the liquid recovery cylinder 1, with its upper and lower ends respectively connected to the inner cavity of the liquid recovery cylinder 1. A fixedly connected connecting pipe 8 is provided at the bottom of the liquid recovery cylinder 1, and a fixedly connected connecting flange 9 is provided at the bottom of the connecting pipe 8. The top of the connecting pipe 8 extends into the inner cavity of the liquid recovery cylinder 1, and a breather valve 14 is provided at its top end. A fixedly connected side connecting pipe 10 is provided on one side of the connecting pipe 8, with one end connected to the connecting pipe 8 and the other end of the side connecting pipe 10 having a threaded plug 11. A connecting branch pipe 12 is connected at both ends to the inner cavity of the liquid recovery cylinder 1 and the side connecting pipe 10, and a valve 13 is installed on the connecting branch pipe 12. When the dynamic separator of the coal mill is running, the liquid-containing gas generated inside enters the breather valve 14 through the connecting pipe 8. After the gas is initially separated by the breather valve 14, the liquid drips into the connecting pipe 8. Some of the liquid flows into the liquid recovery tank 1 for collection through the side connecting pipe 10 and the connecting branch pipe 12 (valve 13 needs to be opened). The unseparated gas continues to flow upward and enters the exhaust filter 5 through the exhaust pipe 15. The exhaust filter 5 intercepts impurities such as coal powder in the gas, and the purified gas is discharged outside the equipment. As the liquid accumulates in the liquid recovery tank 1, the level gauge 3 displays the liquid level in real time. When the liquid level reaches the set upper limit, the valve 13 on the connecting branch pipe 12 can be opened to return the liquid to the connecting pipe 8 and finally back into the coal mill system, realizing the recovery and reuse of the liquid. When cleaning is required, the valve 13 can be closed and the plug can be unscrewed to unclog the connecting pipe 8 and the side connecting pipe 10.

[0027] In this preferred embodiment, the liquid recovery cylinder 1 is a cylindrical or conical cylinder, which can improve the volume utilization rate of the liquid recovery cylinder 1 and meet the needs of large-flow liquid recovery.

[0028] In a preferred embodiment, the outer surface of the liquid recovery cylinder 1 is provided with a heat insulation layer, which is made of high-temperature resistant ceramic fiber material with a thickness of 5 to 10 mm. The high-temperature resistant ceramic fiber material has the characteristics of high temperature resistance and thermal stability, which can reduce the thermal stress of the liquid recovery cylinder and protect the seals and valves, avoiding material deformation and damage, and high-temperature aging failure of the equipment. It can maintain a stable temperature of the recovered liquid and ensure recovery efficiency.

[0029] In a preferred embodiment of this invention, the outer wall of the exhaust pipe 15 is covered with a heat insulation sleeve made of silicone. Silicone has excellent heat insulation properties, which not only blocks high-temperature conduction, eliminating the risk of burns, but also reduces temperature loss inside the pipe, preventing blockage caused by oil and gas condensation.

[0030] In a preferred embodiment, the liquid recovery cylinder 1 has a connecting hole on its top circumference, and the upper cover 2 has a corresponding connecting hole on its circumference. The liquid recovery cylinder 1 and the upper cover 2 are connected by the connecting holes and connecting bolts 4. The bolt connection structure, with its evenly distributed circumferential force, ensures the reliability of the high-pressure oil and gas seal. The upper cover 2 can be quickly disassembled and assembled, improving maintenance efficiency.

[0031] In a preferred embodiment, the exhaust filter 5 is provided with a connecting plate 7 at the top, and support screws 6 are respectively fitted on both sides of the connecting plate 7. The connecting plate 7 and the support screws 6 are detachably connected by nuts, and the bottom of each support screw 6 is fixedly connected to the upper cover 2.

[0032] In a preferred embodiment of this invention, the side connecting pipe 10 and the plug 11 are detachable threaded connections. If the side connecting pipe 10 becomes blocked, it can be quickly disassembled and cleaned. The plug 11 ensures reliable sealing and prevents dust from entering.

[0033] In a preferred embodiment, a drain pipe 16 is provided at the bottom of the connecting pipe 8. The drain pipe 16 is connected to the connecting pipe 8, and a ball valve 17 is installed on the drain pipe 16. The drain pipe 16 can quickly discharge the accumulated oil and grease in the pipe, avoid blockage of the connecting pipe 8, and improve cleaning efficiency.

[0034] In a specific implementation, this utility model is connected to the dynamic separator of the coal mill via the connecting flange 9. When the dynamic separator of the coal mill is working normally, the gas in the system will enter the inner cavity of the liquid recovery cylinder 1 through the connecting pipe 8 and the breather valve 14. The gas will be discharged through the exhaust pipe 15 and the exhaust filter 5 to ensure the gas pressure balance in the system. The lubricating oil carried by the movement and wind pressure will cause the oil and gas of the breather valve 14 to be stored in the inner cavity of the liquid recovery cylinder 1, and the liquid level will be monitored in real time by the liquid level gauge 3.

[0035] When oil needs to be drained, first open valve 13 on the connecting branch pipe 12, and then drain the oil by controlling valve 13 and using the end of the side connecting pipe 10 away from the connecting pipe 8.

[0036] If the level gauge 3 shows an excessively high level during use, promptly check the system for leaks or abnormal operating conditions and take appropriate measures. If the breather valve 14 malfunctions, preventing smooth gas discharge, immediately stop the machine, inspect, and replace the breather valve 14.

[0037] The basic principles and main features of this utility model have been described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, "first feature" and "second feature" may include one or more of the indicated features. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the indicated features.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] In the description of this specification, references to terms such as "some embodiments," "optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A novel breather valve for a dynamic separator in a coal mill, characterized in that, The liquid recovery cylinder (1) is a cylindrical structure with openings at both ends. The liquid recovery cylinder (1) has a fixedly connected upper cover (2) at the top. The upper cover (2) has an exhaust pipe (15) on it. The bottom end of the exhaust pipe (15) is connected to the inner cavity of the liquid recovery cylinder (1), and the top end of the exhaust pipe (15) is connected to the exhaust filter (5). A level gauge (3) is installed on one side of the liquid recovery cylinder (1), and the upper and lower ends of the level gauge (3) are respectively connected to the inner cavity of the liquid recovery cylinder (1); The liquid recovery cylinder (1) has a fixedly connected connecting pipe (8) at the bottom, and a fixed connecting flange (9) at the bottom of the connecting pipe (8). The top of the connecting pipe (8) extends into the inner cavity of the liquid recovery cylinder (1), and a breather valve (14) is provided at its top. A fixed side connecting pipe (10) is provided on one side of the connecting pipe (8). One end of the side connecting pipe (10) is connected to the connecting pipe (8), and the other end of the side connecting pipe (10) is provided with a threaded plug (11). The two ends of the connecting branch pipe (12) are connected to the inner cavity of the liquid recovery cylinder (1) and the side connecting pipe (10), respectively, and a valve (13) is installed on the connecting branch pipe (12).

2. A novel breather valve for a dynamic separator in a coal mill according to claim 1, characterized in that, The liquid recovery cylinder (1) is a cylindrical cylinder or a conical cylinder.

3. A novel breather valve for a dynamic separator in a coal mill according to claim 1, characterized in that, The outer surface of the liquid recovery cylinder (1) is provided with a heat insulation layer, which is made of high-temperature resistant ceramic fiber material and has a thickness of 5 to 10 mm.

4. A novel breather valve for a dynamic separator in a coal mill according to claim 1, characterized in that, The outer wall of the exhaust pipe (15) is covered with a heat insulation sleeve, which is made of silicone.

5. A novel breather valve for a dynamic separator in a coal mill according to claim 1, characterized in that, The liquid recovery cylinder (1) has a connecting hole on its top circumference, and the upper cover (2) has a corresponding connecting hole on its circumference. The liquid recovery cylinder (1) and the upper cover (2) are connected by the connecting hole and the connecting bolt (4).

6. A novel breather valve for a dynamic separator in a coal mill according to claim 1, characterized in that, The exhaust filter (5) is provided with a connecting plate (7) at the top. Supporting screws (6) are respectively fitted on both sides of the connecting plate (7). The connecting plate (7) and the supporting screws (6) are detachably connected by nuts. The bottom of each supporting screw (6) is fixedly connected to the upper cover (2).

7. A novel breather valve for a dynamic separator in a coal mill according to claim 1, characterized in that, The side connecting pipe (10) and the plug (11) are detachable threaded connection structures.

8. A novel breather valve for a dynamic separator in a coal mill according to claim 1, characterized in that, The bottom of the connecting pipe (8) is provided with a drain pipe (16), the drain pipe (16) is connected to the connecting pipe (8), and a ball valve (17) is installed on the drain pipe (16).

Images