Independent closed stainless steel spray pipeline for coal cutter drum

Abstract

The application discloses an independent closed stainless steel spray pipeline for a coal cutter drum, which comprises a main stainless steel water pipe, a branch water pipe, an internal thread joint, an O-shaped sealing ring, liquid sealing glue, a stainless steel ring and a fireproof shock-absorbing sponge sleeve pipe; the end disc water pipe and the blade water pipe are connected through numerical control pipe bending and argon arc welding, the main stainless steel water pipe is drilled at the position corresponding to the drum and is connected with the internal thread joint through argon arc welding, the internal thread joint is internally provided with the O-shaped sealing ring, the branch water pipe is screwed into the internal thread joint after being coated with the liquid sealing glue (the O-shaped sealing ring is compressed to form triple sealing), the gap between the branch water pipe and the water hole of the drum is filled with the stainless steel ring and is welded through argon arc welding, and the main stainless steel water pipe is coated with the fireproof shock-absorbing sponge sleeve pipe and is separated from the drum body. The independent closed water channel is realized, rust blockage and leakage are prevented, vibration resistance and drum cracking influence are avoided, and stable operation of the spray system is ensured.

Description

Technical Field

[0001] This application relates to the technical field of auxiliary devices for coal mining machines, specifically to an independent enclosed stainless steel spray pipe for a coal mining machine drum. Background Technology

[0002] In underground coal mining operations, the spray device on the coal mining machine drum is a core auxiliary device that ensures mining safety and operational efficiency. Its main functions include dust suppression (improving the underground working environment and protecting the respiratory health of workers), cooling cutting components (extending the life of vulnerable parts such as drum cutting teeth), and explosion and fire prevention (reducing the risk of coal dust explosions). The stable operation of the spray device depends on the water channels and holes inside the drum. These channels and holes form the water supply channels and directly determine the spraying effect.

[0003] However, the existing water channel design of coal mining machine drums generally has the following problems: 1. Most drum water channels are machined directly on the drum body (usually made of ordinary steel). The damp and corrosive environment underground can easily cause the inner wall of the water channel to rust. The rust products will fall off and block the subsequent water holes. 2. In addition to rust products, impurities in the well water are prone to deposit in the non-enclosed water channels, which further aggravates the blockage of the water holes, resulting in insufficient spray volume or interruption of spray. 3. The drum will be subjected to severe vibration during coal cutting, and the drum body may crack after long-term use, which will directly lead to water channel damage and leakage. At the same time, the existing water channel and water hole connection has a simple sealing structure (mostly a single thread seal), which is prone to seal failure due to vibration, further causing leakage.

[0004] The aforementioned problems will significantly reduce the spraying effect of the coal mining machine drum, which will not only affect the operating efficiency, but also increase safety hazards such as excessive coal dust, overheating and damage of components, and explosions, posing a serious threat to coal mine safety production and personnel health. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this application is to provide an independent closed stainless steel spray pipe for coal mining machine drum, so as to solve the problems mentioned in the background art.

[0006] According to one aspect of this application, an independent enclosed stainless steel spray pipe for a coal mining machine drum includes a main stainless steel water pipe, branch water pipes, internal threaded joints, stainless steel fixing rings, and a fireproof and shock-absorbing sponge sleeve. The main stainless steel water pipe includes an end plate water pipe section and a blade water pipe section. The end plate water pipe section is arranged circumferentially along the inner side of the end plate of the coal mining machine drum, and the blade water pipe section is spirally arranged along the inner side of the coal mining machine drum corresponding to the blade positions. The end plate water pipe section and the blade water pipe section are fixedly connected. A plurality of connection holes are opened on the pipe wall of the main stainless steel water pipe at the spraying positions required by the coal mining machine drum. Each connection hole is fixedly provided with an internal threaded joint. Each threaded connector is fixedly equipped with a branch water pipe. The connection between the internal threaded connector and the branch water pipe is a sealed connection. Water holes are opened on the inner side of the coal mining machine drum corresponding to its spray requirements. The end of the branch water pipe away from the internal threaded connector passes through the corresponding water hole of the coal mining machine drum. The gap between the branch water pipe and the drum water hole is filled with a stainless steel fixing ring. The stainless steel fixing ring is fixedly connected to the inner wall of the branch water pipe and the drum water hole by argon arc welding. The outer surface of the main stainless steel water pipe is wrapped with a fireproof and shock-absorbing sponge sleeve. The main stainless steel water pipe is separated from the main body of the coal mining machine drum, and the end of the main stainless steel water pipe is welded and fixed to the coal mining machine drum.

[0007] Preferably, the internal threaded connector is fixed at the connection hole by argon arc welding, and an O-ring is embedded in the groove of the inner wall of the internal threaded connector. One end of the branch pipe has a pipe thread on its outer circumferential surface. The pipe thread section of the branch pipe is uniformly coated with liquid sealant, and the pipe thread section of the branch pipe is threadedly connected to the internal threaded connector. The end of the branch pipe is pressed against the O-ring.

[0008] Preferably, the end plate water pipe section and the blade water pipe section are bent by a CNC pipe bending machine and then fixedly connected by argon arc welding.

[0009] Preferably, the stainless steel fixing ring is made of 304 stainless steel or 316 stainless steel, as are the main stainless steel water pipe and the branch water pipe.

[0010] Preferably, the fireproof and shock-absorbing sponge sleeve covers the entire outer surface of the main stainless steel water pipe except for the cable connection hole and its end welding area.

[0011] Preferably, the number of the internal threaded joints corresponds one-to-one with the number of the branch water pipes, and both are adapted to the number of spray holes of the coal mining machine drum.

[0012] Preferably, the main stainless steel water pipe can withstand a water pressure of not less than 10 MPa.

[0013] The advantages of this application compared to existing technologies are: 1. It adopts an overall closed stainless steel water circuit (both the main water pipe and the branch water pipe are made of stainless steel), and the water circuit is separated from the main body of the drum, which prevents the main body of the drum from rusting or impurities from entering the water circuit, thus fundamentally solving the problems of water circuit corrosion and pipe blockage. 2. The branch water pipe and the internal threaded connector adopt a triple sealing structure. The branch water pipe and the water hole of the roller are sealed with stainless steel ring welding. The double sealing design completely eliminates water hole leakage and ensures stable spray volume. 3. The main water channel is separated from the main drum body. Combined with the buffering effect of the fireproof and shock-absorbing sponge sleeve, the impact of cutting vibration on the water channel can be effectively reduced. Even if the main drum body cracks, the independent stainless steel water channel will not be affected, ensuring the continuous operation of the spray system. 4. It adopts an assembly design (prefabricated stainless steel water channels are then assembled with the drum), which solves the problem that traditional integrally welded stainless steel water channels cannot be installed. In addition, the number of internal threaded joints and branch water pipes can be flexibly adjusted to adapt to different models of coal mining machine drums. Attached Figure Description

[0014] Figure 1 This is a perspective view of an independent, enclosed stainless steel spray pipe for a coal mining machine drum according to an embodiment of this application.

[0015] Figure 2 This is a front view of an independent, enclosed stainless steel spray pipe for a coal mining machine drum according to an embodiment of this application.

[0016] Figure 3 This is a partial exploded view of the branch water pipe of an independent closed stainless steel spray pipe for a coal mining machine drum according to an embodiment of this application.

[0017] Attached reference numerals: 1. Main stainless steel water pipe; 101. End plate water pipe section; 102. Blade water pipe section; 2. Branch water pipe; 201. Pipe thread section; 3. Internal threaded connector; 4. Fireproof and shock-absorbing sponge sleeve; 5. O-ring seal. Detailed Implementation

[0018] To make the content of this application easier to understand, the appendices in the embodiments of this application will be described below. Figure 1-3 The technical solutions in the embodiments of this application will be clearly and completely described below. It should be noted that the terms "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0019] like Figures 1-3As shown, an independent, enclosed stainless steel spray pipe for a coal mining machine drum includes a main stainless steel water pipe 1, branch water pipes 2, internal threaded joints 3, stainless steel fixing rings, and fireproof and shock-absorbing sponge sleeves 4. The main stainless steel water pipe 1 includes an end plate water pipe section 101 and a blade water pipe section 102. The end plate water pipe section 101 is arranged circumferentially along the inner side of the end plate of the coal mining machine drum, and the blade water pipe section 102 is spirally arranged along the inner side of the coal mining machine drum at the corresponding blade positions. The end plate water pipe section 101 and the blade water pipe section 102 are first bent into shapes that fit the end plate and blades of the coal mining machine drum using a CNC pipe bending machine, and then fixedly connected by argon arc welding to ensure the sealing and structural strength of the water system. The pipe wall of the main stainless steel water pipe 1 is decorated with spray pipes corresponding to the spray requirements of the coal mining machine drum. Several connection holes are provided at the location, and each connection hole is fixed with an internal threaded connector 3 by argon arc welding. Argon arc welding can avoid gaps in the weld and prevent water leakage from the weld. An O-ring 5 is pre-embedded in the inner groove of each internal threaded connector 3. A branch water pipe 2 is fixedly installed on each internal threaded connector 3. The connection between the internal threaded connector 3 and the branch water pipe 2 is a sealed connection. The number of internal threaded connectors 3 corresponds one-to-one with the number of branch water pipes 2, and is adapted to the number of spray holes of the coal mining machine drum. Specifically, one end of the branch water pipe 2 has a pipe thread machined on its outer circumference. The pipe thread section 201 of the branch water pipe 2 is uniformly coated with liquid sealant, and the pipe thread section 201 of the branch water pipe 2 is threadedly connected to the internal threaded connector 3. The threaded gap is filled, and the end of the branch pipe 2 is pressed with an O-ring 5, thus forming a triple sealing structure of pipe thread seal, liquid sealant seal, and O-ring 5 seal, completely eliminating leakage at the connection between the branch pipe 2 and the internal threaded joint 3. Water holes are opened on the inner side of the coal mining machine drum corresponding to its spray requirements. The end of the branch pipe 2 away from the internal threaded joint 3 passes through the corresponding water hole of the coal mining machine drum. A stainless steel retaining ring is filled in the gap between the branch pipe 2 and the drum water hole. The stainless steel retaining ring is fixedly connected to the inner wall of both the branch pipe 2 and the drum water hole by argon arc welding, thus fixing the branch pipe 2 and sealing the gap to prevent leakage. The material of the stainless steel retaining ring is the same as that of the main stainless steel water pipe 1 and the branch pipe 2, both being 30. 4. Stainless steel or 316 stainless steel to avoid electrochemical corrosion; the outer surface of the main stainless steel water pipe 1 is wrapped with a fireproof and shock-absorbing sponge sleeve 4, which covers the entire outer surface of the main stainless steel water pipe 1 except for the connection hole and the welding area at its end, and has the functions of fireproofing and shock absorption; the main stainless steel water pipe 1 is set separately from the main body of the coal mining machine drum, and the end of the main stainless steel water pipe 1 is welded and fixed to the coal mining machine drum. This design can reduce the impact of drum cutting vibration on the main water circuit, and even if the drum body cracks, it will not affect the independent stainless steel water circuit, ensuring the normal operation of the spray system; the entire pipeline of the main stainless steel water pipe 1 can withstand a water pressure of not less than 10MPa, meeting the needs of high-pressure spraying in coal mines.

[0020] The above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, without departing from the spirit and scope defined by the claims of this application.

Claims

1. A self-contained closed spray pipe for a coal cutter drum, characterized in that, The system includes a main stainless steel water pipe (1), branch water pipes (2), internal threaded connectors (3), stainless steel fixing rings, and fireproof and shock-absorbing sponge sleeves (4). The main stainless steel water pipe (1) includes an end plate water pipe section (101) and a blade water pipe section (102). The end plate water pipe section (101) is arranged circumferentially along the inner side of the end plate of the coal mining machine drum. The blade water pipe section (102) is spirally arranged along the inner side of the coal mining machine drum at the position corresponding to the blade. The end plate water pipe section (101) and the blade water pipe section (102) are fixedly connected. Several connection holes are opened on the pipe wall of the main stainless steel water pipe (1) at the spraying position required by the coal mining machine drum. An internal threaded connector (3) is fixedly provided at each connection hole. Each internal threaded connector (3) has A branch water pipe (2) is fixedly installed. The connection between the internal threaded connector (3) and the branch water pipe (2) is sealed. A water hole is opened on the inner side of the coal mining machine drum corresponding to its spraying requirements. One end of the branch water pipe (2) away from the internal threaded connector (3) is inserted into the water hole of the corresponding coal mining machine drum. A stainless steel fixing ring is filled in the gap between the branch water pipe (2) and the drum water hole. The stainless steel fixing ring is fixedly connected to the branch water pipe (2) and the inner wall of the drum water hole by argon arc welding. The outer surface of the main stainless steel water pipe (1) is wrapped with a fireproof and shock-absorbing sponge sleeve (4). The main stainless steel water pipe (1) is separated from the main body of the coal mining machine drum, and the end of the main stainless steel water pipe (1) is welded and fixed to the coal mining machine drum.

2. A self-contained closed spray pipe for a shearer drum as claimed in claim 1, characterised in that, The internal threaded connector (3) is fixed at the connection hole by argon arc welding. An O-ring (5) is embedded in the groove of the inner wall of the internal threaded connector (3). One end of the branch pipe (2) has a pipe thread. The pipe thread section (201) of the branch pipe (2) is uniformly coated with liquid sealant. The pipe thread section (201) of the branch pipe (2) is threadedly connected to the internal threaded connector (3). The end of the branch pipe (2) is pressed against the O-ring (5).

3. A self-contained closed spray pipe for a shearer drum as claimed in claim 1, characterised in that, The end plate water pipe section (101) and the blade water pipe section (102) are bent by a CNC pipe bending machine and then fixedly connected by argon arc welding.

4. A self-contained closed spray pipe for a shearer drum according to claim 1, wherein The stainless steel fixing ring is made of 304 stainless steel or 316 stainless steel, as are the main stainless steel water pipe (1) and the branch water pipe (2).

5. A self-contained closed spray pipe for a shearer drum according to claim 1 wherein, The fireproof and shock-absorbing sponge sleeve (4) covers the entire outer surface of the main stainless steel water pipe (1) except for the connection hole and the welding area at its end.

6. A self-contained closed spray pipe for a shearer drum as claimed in claim 1, characterised in that, The number of the internal threaded connectors (3) corresponds one-to-one with the number of the branch water pipes (2), and both are adapted to the number of spray holes of the coal mining machine drum.

7. A self-contained closed spray pipe for a shearer drum as claimed in claim 1, characterised in that, The main stainless steel water pipe (1) can withstand a water pressure of not less than 10 MPa.

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