Replaceable high-voltage cable lead-in device of coal mining machine

Abstract

The invention discloses a coal mining machine replaceable high-voltage cable lead-in device which comprises an electric control box, a wire inlet channel, a wire inlet terminal fixing plate and a high-voltage cable inlet block, the wire inlet channel is detachably arranged at the bottom of the electric control box and used for leading in a cable, and the wire inlet terminal fixing plate is arranged on the side, close to the wire inlet channel, in the electric control box and used for supplying power to the electric control box. The high-voltage cable inlet block is arranged at the tail end of the inlet channel and is used for being quickly connected and fixed with a high-voltage cable, the inlet channel comprises an independent inlet small cover plate and a high-voltage cable lead cylinder, and the high-voltage cable lead cylinder is vertically welded on the independent inlet small cover plate. The whole structure is simple, replacement and maintenance of different types of wire inlet modes are facilitated, the maintenance efficiency and use flexibility of the electric cabinet of the coal mining machine are effectively improved, the bending radius of an inlet cable is effectively reduced, the pressure and stress of a cable conductor are reduced, the electrical performance and mechanical performance of the inlet cable are effectively improved, and the safety is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining machines, and in particular relates to a replaceable high-voltage cable introduction device for coal mining machines. Background Art

[0002] With the rapid development of the coal industry, the high-voltage incoming cable device of the coal mining machine electrical control box is a key component. The rationality of its incoming cable structure directly affects the convenience of cable replacement and the operating efficiency of the entire coal mining system. However, the traditional coal mining machine electrical control box incoming cable structure usually adopts an integrated structure design of the electrical control box. After the cable is connected, it is directly fixed on the electrical control box through a pressure plate cable introduction device or a mine flameproof high-voltage cable connector. Although this design is simple and easy, it lacks flexibility, so that the same electrical control box cannot meet two different incoming cable methods. The cable interface needs to be replaced before it can be used, which seriously affects the installation efficiency and installation cost. Summary of the invention

[0003] In order to at least partially solve the technical problems existing in the above-mentioned prior art, the present invention provides a replaceable high-voltage cable introduction device for a coal mining machine.

[0004] The replaceable high-voltage cable introduction device of the coal mining machine of the present invention comprises an electric control box, an inlet channel, an inlet terminal fixing plate and a high-voltage cable inlet block, wherein the inlet channel is detachably arranged at the bottom of the electric control box for introducing cables, the inlet terminal fixing plate is arranged inside the electric control box near one side of the inlet channel for supplying power to the electric control box, and the high-voltage cable inlet block is arranged at the end of the inlet channel for quick connection and fixing with the high-voltage cable, wherein:

[0005] The line inlet channel comprises an independent line inlet small cover plate and a high-voltage cable lead-in barrel, and the high-voltage cable lead-in barrel is vertically welded on the independent line inlet small cover plate.

[0006] Furthermore, in the above-mentioned replaceable high-voltage cable introduction device for a coal mining machine, a sealing groove is provided at the bottom of the electric control box, the sealing groove matches the independent small inlet cover plate, and the independent small inlet cover plate is embedded in the sealing groove and fixedly connected to the electric control box by bolts.

[0007] Furthermore, in the above-mentioned replaceable high-voltage cable introduction device for a coal mining machine, the incoming line terminal fixing plate is welded to the inside of the electric control box, and an incoming line cavity is enclosed between the incoming line terminal fixing plate and the electric control box.

[0008] Furthermore, in the above-mentioned replaceable high-voltage cable introduction device for a coal mining machine, a wire entry hole is provided in the middle of the independent wire entry small cover plate, the wire entry hole is coaxial with the center of the high-voltage cable lead-in reel, and the high-voltage cable lead-in reel is connected to the wire entry cavity through the wire entry hole.

[0009] Furthermore, in the above-mentioned replaceable high-voltage cable introduction device for a coal mining machine, one side of the high-voltage cable lead-in barrel is bent at an angle of 110 degrees, and the end of the high-voltage cable lead-in barrel is welded to the end face of the high-voltage cable inlet block at 90 degrees.

[0010] Furthermore, in the above-mentioned replaceable high-voltage cable introduction device for the coal mining machine, the high-voltage cable entry block matches the high-voltage cable interface.

[0011] The replaceable high-voltage cable lead-in device for a coal mining machine of the present invention has the following advantages and beneficial effects:

[0012] (1) The overall structure of the present invention is simple, and the high-voltage incoming cable introduction device can be replaced by adopting the incoming cable channel setting, which is convenient for the replacement and maintenance of different types of incoming cable modes, and effectively improves the maintenance efficiency and use flexibility of the coal mining machine electrical control box;

[0013] (2) The high-voltage cable lead barrel is bent at an angle of 110 degrees, which effectively reduces the bending radius of the incoming cable, reduces the pressure and stress of the cable conductor, effectively improves the electrical and mechanical properties of the incoming cable, and improves safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0015] Figure 1 It is a schematic diagram of the installation structure of the replaceable high-voltage cable introduction device for a coal mining machine of the present invention;

[0016] Figure 2 It is a schematic cross-sectional structure diagram of the replaceable high-voltage cable introduction device for a coal mining machine of the present invention.

[0017] Description of reference numerals:

[0018] 1: Electric control box, 11: Sealing groove;

[0019] 2: Line entry corridor;

[0020] 21: Independent small cable entry cover, 211: Cable entry hole;

[0021] 22: High voltage cable lead barrel;

[0022] 3: Inlet terminal fixing plate; 4: High-voltage cable inlet block; 5: Inlet cavity. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] like Figure 1 to Figure 2 As shown, the replaceable high-voltage cable introduction device for a coal mining machine of the present invention comprises an electric control box 1, an inlet channel 2, an inlet terminal fixing plate 3 and a high-voltage cable inlet block 4. The inlet channel 2 is detachably arranged at the bottom of the electric control box 1 for introducing cables. The inlet terminal fixing plate 3 is arranged inside the electric control box 1 near the side of the inlet channel 2 for supplying power to the electric control box 1. The high-voltage cable inlet block 4 is arranged at the end of the inlet channel 2 for quick connection and fixing with the high-voltage cable, wherein:

[0025] The line inlet channel 2 comprises an independent line inlet small cover plate 21 and a high-voltage cable lead-in barrel 22 , and the high-voltage cable lead-in barrel 22 is vertically welded to the independent line inlet small cover plate 21 .

[0026] Furthermore, in the replaceable high-voltage cable introduction device for a coal mining machine of the present invention, a sealing groove 11 is provided at the bottom of the electric control box 1, and the sealing groove 11 matches the independent small inlet cover 21. The independent small inlet cover 21 is embedded in the sealing groove 11 and fixedly connected to the electric control box 1 by bolts, so that the independent small inlet cover 21 can be disassembled and replaced, while preventing dust and moisture from entering the electric control box 1 and causing damage to the cable.

[0027] Furthermore, in the replaceable high-voltage cable introduction device for the coal mining machine of the present invention, the incoming line terminal fixing plate 3 is welded to the inside of the electric control box 1, and an incoming line cavity 5 is formed between the incoming line terminal fixing plate 3 and the electric control box 1, thereby separating the high-voltage cable introduction device from the electrical components inside the electric control box 1, effectively ensuring that the explosion-proof parameters inside the electric control box 1 and the incoming line cavity 5 remain unchanged.

[0028] Furthermore, in the replaceable high-voltage cable introduction device for the coal mining machine of the present invention, an independent small inlet cover 21 is provided with an inlet hole 211 in the middle, and the inlet hole 211 is coaxial with the center of the high-voltage cable lead-in reel 22. The high-voltage cable lead-in reel 22 is connected with the inlet cavity 5 through the inlet hole 211, so that the high-voltage cable can be directly connected to the inlet terminal to supply power to the electric control box 1 after being introduced through the high-voltage cable lead-in reel 22.

[0029] Furthermore, in the replaceable high-voltage cable introduction device for a coal mining machine of the present invention, one side of the high-voltage cable lead-in reel 22 is bent at an angle of 110 degrees, and the end of the high-voltage cable lead-in reel 22 is welded to the end face of the high-voltage cable inlet block 4 at 90 degrees, thereby effectively reducing the bending radius of the incoming cable and reducing the pressure and stress on the cable conductor.

[0030] Furthermore, in the replaceable high-voltage cable introduction device for a coal mining machine of the present invention, the high-voltage cable inlet block 4 matches the high-voltage cable interface, thereby facilitating rapid connection of the high-voltage cable to the high-voltage cable introduction device.

[0031] Specifically, first, a high-voltage cable entry block 4 installed at the end of the entry channel 2 is selected to match the high-voltage cable interface to be connected. At this time, the independent entry cover 21 on the entry channel 2 is fixed to the sealing groove 11 of the electrical control box 1 by bolts. When the cable interface changes, it is only necessary to remove the independent entry cover 21 and replace the high-voltage cable entry block 4 of a model matching the cable interface installed at the end of the entry channel 2. At this time, the high-voltage cable is quickly connected and fixed to the high-voltage cable entry block 4, and the cable core is introduced through the high-voltage cable lead-in reel 22. During the introduction process, the 110° large threading angle design of the high-voltage cable lead-in reel 22 is bent to effectively reduce the bending radius of the incoming cable, reduce the pressure and stress of the cable conductor, and improve the safety performance of the incoming cable. After the cable is introduced, it enters the incoming cavity 5 through the entry hole 211 and is connected to the incoming terminal to supply power to the electrical control box 1.

[0032] In summary, compared with the prior art, the replaceable high-voltage cable introduction device for a coal mining machine of the present invention has the following advantages and beneficial effects:

[0033] (1) The overall structure of the present invention is simple, and the high-voltage incoming cable introduction device can be replaced by adopting the incoming cable channel setting, which is convenient for the replacement and maintenance of different types of incoming cable modes, and effectively improves the maintenance efficiency and use flexibility of the coal mining machine electrical control box;

[0034] (2) The high-voltage cable lead barrel is bent at an angle of 110 degrees, which effectively reduces the bending radius of the incoming cable, reduces the pressure and stress of the cable conductor, effectively improves the electrical and mechanical properties of the incoming cable, and improves safety.

[0035] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A replaceable high-voltage cable lead-in device for a coal mining machine, characterized in that: The replaceable high-voltage cable introduction device for the coal mining machine includes an electric control box, an inlet channel, an inlet terminal fixing plate and a high-voltage cable inlet block. The inlet channel is detachably arranged at the bottom of the electric control box for introducing cables. The inlet terminal fixing plate is arranged inside the electric control box near one side of the inlet channel for supplying power to the electric control box. The high-voltage cable inlet block is arranged at the end of the inlet channel for quick connection and fixing with the high-voltage cable, wherein: The line inlet channel comprises an independent line inlet small cover plate and a high-voltage cable lead-in barrel, and the high-voltage cable lead-in barrel is vertically welded on the independent line inlet small cover plate.

2. The replaceable high-voltage cable lead-in device for a coal mining machine according to claim 1, characterized in that: A sealing groove is provided at the bottom of the electric control box, and the sealing groove matches the independent wire inlet small cover plate. The independent wire inlet small cover plate is embedded in the sealing groove and fixedly connected to the electric control box by bolts.

3. The replaceable high-voltage cable lead-in device for a coal mining machine according to claim 1, characterized in that: The incoming line terminal fixing plate is welded to the inside of the electric control box, and an incoming line cavity is formed between the incoming line terminal fixing plate and the electric control box.

4. The replaceable high-voltage cable lead-in device for a coal mining machine according to claim 3, characterized in that: A wire entry hole is provided in the middle of the independent wire entry small cover plate, the wire entry hole is coaxial with the center of the high-voltage cable lead-in barrel, and the high-voltage cable lead-in barrel is connected with the wire entry cavity through the wire entry hole.

5. The replaceable high-voltage cable lead-in device for a coal mining machine according to claim 1, characterized in that: One side of the high-voltage cable lead barrel is bent at an angle of 110 degrees, and the end of the high-voltage cable lead barrel is welded to the end face of the high-voltage cable inlet block at 90 degrees.

6. The replaceable high-voltage cable lead-in device for coal mining machine according to claim 1, characterized in that: The high-voltage cable inlet block matches the high-voltage cable interface.

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