Explosion-proof traction transformer for high-voltage coal mining machine

Abstract

The utility model discloses a kind of high-voltage coal winning machine is used to prevent explosion traction transformer, belong to traction transformer technical field, including fastening frame, wire package and silicon steel sheet are installed on the fastening frame;The wire package includes high-voltage coil, low-voltage coil inside high-voltage coil, support plate made of insulating material is arranged between high-voltage coil and low-voltage coil, the inside and outside of the support plate are provided with several interval strips made of insulating material, and heat dissipation air duct is formed between adjacent interval strips;The bottom of the fastening frame is provided with the auxiliary motion mechanism that drives prevent explosion traction transformer movement, several heat dissipation fans are provided below the heat dissipation air duct;Insulating resin glue is poured on the outer surface of high-voltage coil and low-voltage coil;Temperature sensor is provided on the wire package and / or silicon steel sheet.The utility model improves the heat dissipation and safety of transformer on the one hand, and on the other hand, the convenience of prevent explosion traction transformer movement is improved.

Description

Technical Field

[0001] This utility model belongs to the field of traction transformer technology, specifically relating to an explosion-proof traction transformer for high-voltage coal mining machines. Background Technology

[0002] As is well known, traction transformers, as a type of power transformer with a special voltage level, play a crucial role in power transmission systems. In recent years, with the continuous deepening of my country's industrialization and the rapid advancement of infrastructure construction, the application fields of traction transformers have significantly expanded. Especially in the energy extraction sector, the importance of traction transformers is increasingly prominent. Taking the coal mining industry as an example, traction transformers, as key equipment in underground power supply systems, bear the important responsibility of providing stable power to coal mining machines. It is worth noting that due to the special nature of the coal mining environment, there are safety hazards such as gas accumulation and dust explosions, which places higher demands on the safety performance of traction transformers. Utility Model Content

[0003] The purpose of this utility model is to provide an explosion-proof traction transformer for high-voltage coal mining machines. On the one hand, by establishing a heat dissipation air duct between the high-voltage coil and the low-voltage coil, and using a cooling fan to force-cool the explosion-proof traction transformer, its safe operation is ensured. On the other hand, by setting an auxiliary motion mechanism at the bottom of the explosion-proof traction transformer to drive its movement, the convenience of moving the explosion-proof traction transformer is improved.

[0004] To achieve the above objectives, this utility model provides the following technical solution: An explosion-proof traction transformer for a high-voltage coal mining machine includes a fastening frame on which a coil and silicon steel sheets are mounted. The coil includes a high-voltage coil and a low-voltage coil located inside the high-voltage coil. A support plate made of insulating material is provided between the high-voltage coil and the low-voltage coil. Several spacers made of insulating material are provided on both the inner and outer sides of the support plate, forming a heat dissipation channel between adjacent spacers. An auxiliary motion mechanism for driving the explosion-proof traction transformer is provided at the bottom of the fastening frame. Several cooling fans are provided below the heat dissipation channel. Insulating resin is applied to the outer surfaces of the high-voltage coil and the low-voltage coil. Temperature sensors are provided on the coil and / or the silicon steel sheets.

[0005] Preferably, the end face of the spacer is rectangular or oblong.

[0006] Preferably, the fastening frame includes an upper clamp, a lower clamp, and a pull rod connecting the upper clamp and the lower clamp.

[0007] Preferably, the auxiliary motion mechanism includes two identical motion units fixed to the lower surface of the lower clamp, each motion unit comprising: Two positioning blocks; vertical threaded through holes are provided on the positioning blocks, and vertical bolts are installed at the threaded through holes; A limiting block fixed to the side wall of the positioning block has an inclined groove on its side wall; an inclined set screw is provided at the opening position of the inclined groove. A support shaft, the two ends of which overlap in the inclined groove, and at least two bearings are mounted on the support shaft.

[0008] Preferably, the two support shafts are parallel to each other.

[0009] Preferably, the inclined groove is a U-shaped groove, and the height of the lower edge of the opening of the U-shaped groove is greater than the height of the bottom of the groove.

[0010] Preferably, the inclined set screw has a plug interface for connecting to the handle rod.

[0011] Preferably, the limiting block includes a first limiting part and a second limiting part, wherein the inclined groove is formed on the side wall of the first limiting part, and the second limiting part is located on the opening side of the inclined groove.

[0012] Preferably, both the first limiting part and the second limiting part are welded to the positioning block.

[0013] Preferably, a terminal block is provided on one side of the fastening frame, the high-voltage coil is connected to a 10KV input power supply, and the low-voltage coil, temperature sensor, and PTC temperature protection switch are connected to the terminal block.

[0014] Compared with the prior art, the beneficial effects of this utility model are: By adopting the above technical solution, this utility model, on the one hand, establishes a heat dissipation air duct between the high-voltage coil and the low-voltage coil, and uses a cooling fan to force-cool the explosion-proof traction transformer to ensure its safe operation; on the other hand, it improves the convenience of moving the explosion-proof traction transformer by setting an auxiliary motion mechanism at the bottom of the explosion-proof traction transformer to drive its movement.

[0015] This invention employs an auxiliary motion mechanism with the aforementioned structure. When the explosion-proof traction transformer needs to be moved, the positioning block can be lifted off the ground by rotating the vertical bolt and the inclined set screw, while the bearing remains grounded. The bearing's rotational function facilitates quick and easy movement. When the transformer reaches the designated position, rotating the vertical bolt and the inclined set screw in the opposite direction allows the positioning block to firmly adhere to the ground, while the bearing detaches from the ground, thus ensuring the stability of the explosion-proof traction transformer. This invention improves safety by incorporating a PTC temperature protection switch. Attached Figure Description

[0016] Figure 1 A front view provided for a preferred embodiment of this utility model; Figure 2 A right view provided for a preferred embodiment of this utility model; Figure 3 A top view provided for a preferred embodiment of this utility model; Figure 4 A top view of the coil provided in a preferred embodiment of this utility model; Figure 5 Circuit diagram provided for preferred embodiments of this utility model; Figure 6 A structural diagram of the auxiliary motion mechanism provided in a preferred embodiment of this utility model; Figure 7 A diagram showing the structural changes of the auxiliary motion mechanism provided in a preferred embodiment of this utility model from the initial position to the target position.

[0017] The components include: 1. Upper clamp; 2. Lower clamp; 3. Cooling fan; 4. Silicon steel sheet; 5. Coil; 5-1. High-voltage coil; 5-2. Low-voltage coil; 5-3. Support plate; 5-4. Spacer bar; 5-5. Cooling duct; 6. Pull rod; 7. Auxiliary motion mechanism; 7-1. Vertical bolt; 7-2. Positioning block; 7-3. Limiting block; 7-4. Bearing; 7-5. Support shaft; 7-6. Inclined set screw; 8. Terminal block. Detailed Implementation

[0018] 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.

[0019] Example 1: Please see Figures 1 to 7 As shown, an explosion-proof traction transformer for a high-voltage coal mining machine mainly includes: The fastening frame is made of metal materials with a certain strength (such as channel steel and steel bars), and mainly includes an upper clamp 1, a lower clamp 2, and a tie rod 6 connecting the upper clamp 1 and the lower clamp 2. The fastening frame is a crucial support component in explosion-proof traction transformers. Its main structure is constructed from high-strength, high-quality metal materials (such as channel steel, I-beams, and reinforcing bars). This frame system primarily consists of three core components: an upper clamp 1 at the top, a lower clamp 2 at the bottom, and a tie rod 6 vertically connecting the upper and lower clamps. The upper clamp 1 and lower clamp 2 are made of robust channel steel and are securely joined to the tie rod 6 via welding or bolting, forming a stable rectangular load-bearing system. The tie rod 6 is typically made of high-strength threaded steel or alloy steel bars.

[0020] A coil 5 and a silicon steel sheet 4 are mounted on the fastening frame. The coil 5 mainly includes a high-voltage coil 5-1 and a low-voltage coil 5-2 located inside the high-voltage coil 5-1. A support plate 5-3 made of insulating material is provided between the high-voltage coil 5-1 and the low-voltage coil 5-2. Several spacers 5-4 made of insulating material are provided on both the inner and outer sides of the support plate 5-3, and a heat dissipation duct 5-5 is formed between adjacent spacers 5-4. An auxiliary motion mechanism 7 for driving the explosion-proof traction transformer is provided at the bottom of the fastening frame. Several cooling fans 3 are provided below the heat dissipation duct 5-5. Insulating resin is injected onto the outer surfaces of the high-voltage coil 5-1 and the low-voltage coil 5-2. Temperature sensors are provided on the coil 5 and / or the silicon steel sheet 4.

[0021] A coil 5 and a silicon steel sheet 4 are mounted on the fastening frame. The coil 5 adopts a multi-layer winding structure design, and the silicon steel sheet 4 is made of high-permeability material. The coil 5 mainly includes a high-voltage coil 5-1 and a low-voltage coil 5-2 located inside the high-voltage coil 5-1. Both the high-voltage coil 5-1 and the low-voltage coil 5-2 are made of wire. A support plate 5-3 made of insulating material is provided between the high-voltage coil 5-1 and the low-voltage coil 5-2. This support plate can be made of epoxy glass cloth board material, which has excellent insulation performance and mechanical strength. Several spacer strips 5-4 made of insulating material are provided on both the inner and outer sides of the support plate 5-3. These spacer strips can be made of high-temperature resistant polyimide material, and the spacer strips 5-4 are spaced apart. A heat dissipation duct 5-5 is constructed, with its width precisely calculated to ensure optimal heat dissipation, such as an adjacent spacing of 2cm to 4cm. An auxiliary motion mechanism 7 is installed at the bottom of the fastening frame to drive the explosion-proof traction transformer, enabling convenient and smooth movement of the transformer. Several cooling fans 3 are installed below the heat dissipation duct 5-5, featuring an explosion-proof design with an IP55 protection rating. Insulating resin is applied to the outer surfaces of the high-voltage coil 5-1 and the low-voltage coil 5-2, providing excellent thermal conductivity and electrical insulation. Temperature sensors, employing PT100 platinum resistance thermometers, are installed on the coil 5 and / or silicon steel sheet 4 to monitor temperature changes in critical parts of the transformer in real time.

[0022] The end face of the spacer 5-4 is rectangular or oblong.

[0023] The auxiliary motion mechanism is one of the core technologies of this utility model. Its specific structure is described in detail below with reference to the accompanying drawings: The auxiliary motion mechanism 7 mainly includes two identical motion units fixed to the lower surface of the lower clamp 2. Each motion unit includes: Two positioning blocks 7-2; vertical threaded through holes are provided on the positioning blocks 7-2, and vertical bolts 7-1 are installed at the threaded through holes; A limiting block 7-3 is fixed to the side wall of the positioning block 7-2, and an inclined groove is provided on the side wall of the limiting block 7-3; an inclined set screw 7-6 is provided at the opening position of the inclined groove. A support shaft 7-5, the two ends of which overlap in the inclined groove, and at least two bearings 7-4 are installed on the support shaft 7-5.

[0024] The two support shafts 7-5 are parallel to each other.

[0025] The inclined groove is a U-shaped groove, and the height of the lower edge of the opening of the U-shaped groove is greater than the height of the bottom of the groove.

[0026] The inclined set screw 7-6 is provided with an interface for connecting to the handle rod. During operation, the operator does not need to bend over. He only needs to insert the handle rod directly into the interface and adjust the inclined set screw 7-6 by rotating the handle rod. The handle rod can be a cylindrical rod made of metal. After one end is inserted into the interface, the two can be connected by threads or by rectangular or hexagonal slots.

[0027] The limiting block 7-3 includes a first limiting part and a second limiting part, wherein the inclined groove is formed on the side wall of the first limiting part, and the second limiting part is located on the opening side of the inclined groove.

[0028] Both the first and second limiting parts are welded to the positioning block 7-2.

[0029] A terminal block 8 is provided on one side of the fastening frame. The high-voltage coil 5-1 is connected to a 10KV input power supply, and the low-voltage coil 5-2, temperature sensor, and PTC temperature protection switch are connected to the terminal block 8.

[0030] To further enhance heat dissipation, the explosion-proof traction transformer is fixed to a base plate during installation, and a water-cooling device is installed on the base plate to further cool the transformer.

[0031] In this invention, the input voltage of the explosion-proof traction transformer can reach 10KV, which is much greater than the 3.3KV of a conventional traction transformer. Its power is 1000KVA, greater than the 300VA to 600KVA of a conventional traction transformer, and its dielectric strength can reach 42KV. Specific parameters are shown in Table 1. Table 1 shows the parameters of the explosion-proof traction transformer of the present invention.

[0032] Working principle: This invention utilizes a temperature sensor to continuously monitor temperature data at key points, facilitating timely detection of temperature anomalies. Simultaneously, when the temperature exceeds a certain level, a PTC temperature protection switch automatically cuts off the power supply, ensuring the safety of external equipment and the traction transformer itself. Optionally, the PTC temperature protection switch can also be connected to a central processing unit (CPU), which is equipped with an external alarm. The CPU can then activate the alarm to issue an alarm signal. If it is necessary to move the explosion-proof traction transformer from its initial location to its target location, an auxiliary motion mechanism can be used. Please refer to [link to relevant documentation]. Figure 7 In the initial state, the lower end of the positioning block 7-2 is in contact with the ground, while the bearing 7-4 may not be in contact with the ground. Figure 7As shown in the left-hand diagram, it may also be in contact with the ground; that is, in the initial state, the weight of the explosion-proof traction transformer is entirely borne by the positioning block 7-2. By rotating the vertical bolt 7-1, the lower end of the positioning block 7-2 is gradually moved away from the ground; by rotating the tilting set screw 7-6, the bearing 7-4 is gradually brought into contact with the ground, as shown in the diagram. Figure 7 As shown in the middle diagram, after the explosion-proof traction transformer is moved to its destination, the lower end of the positioning block 7-2 gradually contacts the ground by rotating the vertical bolt 7-1; the bearing 7-4 gradually moves away from the ground by rotating the tilting set screw 7-6. Figure 7 As shown in the right-hand diagram.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art 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 appended claims and their equivalents.

Claims

1. An explosion-proof traction transformer for a high-voltage coal mining machine, comprising a fastening frame, on which a coil (5) and silicon steel sheets (4) are mounted; characterized in that, The coil (5) includes a high-voltage coil (5-1) and a low-voltage coil (5-2) located inside the high-voltage coil (5-1). A support plate (5-3) made of insulating material is provided between the high-voltage coil (5-1) and the low-voltage coil (5-2). Several spacers (5-4) made of insulating material are provided on both the inner and outer sides of the support plate (5-3), and a heat dissipation duct (5-5) is formed between adjacent spacers (5-4). An auxiliary motion mechanism (7) for driving the explosion-proof traction transformer is provided at the bottom of the fastening frame. Several cooling fans (3) are provided below the heat dissipation duct (5-5). Insulating resin glue is injected on the outer surface of the high-voltage coil (5-1) and the low-voltage coil (5-2). A temperature sensor is provided on the coil (5) and / or silicon steel sheet (4).

2. The explosion-proof traction transformer for high-voltage coal mining machines according to claim 1, characterized in that: The end face of the spacer (5-4) is rectangular or oblong.

3. The explosion-proof traction transformer for high-voltage coal mining machines according to claim 1, characterized in that: The fastening frame includes an upper clamp (1), a lower clamp (2), and a pull rod (6) connecting the upper clamp (1) and the lower clamp (2).

4. The explosion-proof traction transformer for high-voltage coal mining machines according to claim 3, characterized in that: The auxiliary motion mechanism (7) includes two identical motion units fixed to the lower surface of the lower clamp (2), each motion unit including: Two positioning blocks (7-2); vertical threaded through holes are provided on the positioning blocks (7-2), and vertical bolts (7-1) are installed at the threaded through holes; A limiting block (7-3) is fixed to the side wall of the positioning block (7-2), and an inclined groove is provided on the side wall of the limiting block (7-3); an inclined set screw (7-6) is provided at the opening position of the inclined groove. A support shaft (7-5) has its two ends overlapping in the inclined groove, and at least two bearings (7-4) are installed on the support shaft (7-5).

5. The explosion-proof traction transformer for high-voltage coal mining machines according to claim 4, characterized in that: The two support shafts (7-5) are parallel to each other.

6. The explosion-proof traction transformer for high-voltage coal mining machines according to claim 4, characterized in that, The inclined groove is a U-shaped groove, and the height of the lower edge of the opening of the U-shaped groove is greater than the height of the bottom of the groove.

7. The explosion-proof traction transformer for high-voltage coal mining machines according to claim 4, characterized in that: The inclined set screw (7-6) has an insertion interface for connecting to the handle rod.

8. The explosion-proof traction transformer for high-voltage coal mining machines according to claim 4, characterized in that: The limiting block (7-3) includes a first limiting part and a second limiting part, wherein the inclined groove is formed on the side wall of the first limiting part, and the second limiting part is located on the opening side of the inclined groove.

9. The explosion-proof traction transformer for high-voltage coal mining machines according to claim 8, characterized in that: Both the first and second limiting parts are welded to the positioning block (7-2).

10. The explosion-proof traction transformer for high-voltage coal mining machines according to any one of claims 1-8, characterized in that: A terminal block (8) is provided on one side of the fastening frame. The high-voltage coil (5-1) is connected to a 10KV input power supply. The low-voltage coil (5-2), temperature sensor, and PTC temperature protection switch are connected to the terminal block (8).

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