Mining explosion-proof vacuum electromagnetic starter

Abstract

The utility model discloses a mining explosion-proof vacuum electromagnetic starter which comprises a starter body and a sealing door, two limiting seats distributed up and down are arranged on the side wall of the starter body, a cavity is formed in each limiting seat, a rotation stopping shaft is rotationally installed in the middle of each cavity, and each rotation stopping shaft penetrates through the corresponding limiting seat and extends to the outside of the corresponding limiting seat; an annular end plate is arranged at the end, outside the limiting base, of the outer wall of the rotation stopping shaft. According to the mining explosion-proof vacuum electromagnetic starter disclosed by the invention, the position of the limiting frame can be limited by adopting a mode that the gear is matched with the teeth, so that the limiting frame tightly presses the sealing door at the opening of the inner cavity of the starter, and a gap is prevented from being generated between the sealing door and the starter; the situation that external humid air and dust enter the starter from a gap to erode electrical components due to the gap between the sealing door and the starter is avoided, use of the starter is guaranteed, and the sealing effect of the sealing door is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic starters, in particular to a mine-used explosion-proof vacuum electromagnetic starter. Background Art

[0002] The mine flameproof vacuum electromagnetic starter consists of a flameproof casing and an AC vacuum contactor, isolating switch, control button, control transformer, RC protection device and other components installed in the casing. The mine flameproof vacuum electromagnetic starter is mainly used to control the direct start, stop and forward and reverse operation of the mine induction motor, and can protect the motor from overload and phase failure. It adopts a quick opening door structure with simple and reasonable structure and easy operation. The main body adopts a vertical plate type and uses a simple control circuit for easy maintenance. The starter starts and stops the load at a long distance and has protection functions such as overload, phase failure, short circuit and leakage lockout detection.

[0003] However, most of the existing sealed doors of explosion-proof vacuum electromagnetic starters for mines adopt a transmission locking structure, in which a lock structure is set on the sealed door, and the position of the sealed door is limited by inserting the lock pin on the sealed door into the inner cavity of the starter. However, locking the sealed door by means of a lock pin will cause a gap between the sealed door and the starter, which makes it easy for external dust or humid air to enter the starter and corrode its internal electrical components, thus affecting the service life of the starter. Therefore, those skilled in the art provide a mine explosion-proof vacuum electromagnetic starter to solve the problems raised in the above background technology. Utility Model Content

[0004] The utility model aims to provide a mine flameproof vacuum electromagnetic starter to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A mine flameproof vacuum electromagnetic starter, comprising: a starter body and a sealing door, the side wall of the starter body is provided with two limit seats distributed up and down, the limit seat is provided with a cavity inside, and a stop shaft is rotatably installed at the middle position of the cavity, the stop shaft passes through the limit seat and extends to the outside thereof, an annular end plate is provided at one end of the outer wall of the stop shaft located outside the limit seat, an annular limit plate is provided on the side of the annular end plate away from the stop shaft, a threaded column is provided at the middle position of the annular limit plate, the threaded column passes through the stop shaft and is threadedly installed inside thereof, and the outer wall of the threaded column is located at the end of the stop shaft located outside the limit seat, and the end of the stop shaft ... A driving plate is threadedly installed between the annular limit plate and the annular end plate, and a plurality of plug rods are evenly arranged on the side of the outer wall of the driving plate close to the annular end plate, the plug rods penetrate the annular end plate and are inserted into the outer wall of the limit seat, and a gear is arranged on the part of the outer wall of the stop shaft located inside the cavity, and a support plate is arranged at a position corresponding to the side wall of the sealing door and the limit seat, and a limit frame is slidably installed inside the support plate, and one end of the limit frame close to the limit seat is inserted into the interior of the cavity and mounted on the outside of the gear, and a plurality of teeth are evenly arranged on the inner wall of the limit frame, and the teeth are meshed with the tooth grooves of the gear.

[0007] Preferably, a slot is provided inside the limiting frame, and the limiting frame is sleeved on the outside of the gear through the slot.

[0008] Preferably, a through slot is provided inside the support plate, and the limiting frame passes through the through slot and is inserted into the inside of the limiting seat.

[0009] Preferably, a baffle plate used to drive the displacement of the limit frame is provided at one end of the limit frame away from the limit seat, and the end surface area of ​​the baffle plate is larger than the opening area of ​​the through slot.

[0010] Preferably, a side wall of the sealing door is provided with an empty groove on one side of the support plate, and the support plate is snap-fitted and installed inside the empty groove and closely attached to the end surface of the support plate.

[0011] Preferably, slots and holes are respectively provided at positions corresponding to the limit seat, the annular end plate and the insertion rod, and the insertion rod passes through the insertion hole and is inserted into the slot.

[0012] Preferably, a thread groove is provided at a middle position of the driving plate, and the thread column is threadably installed inside the driving plate through the thread groove.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] By arranging a limit seat on the outer wall of the starter body, and arranging a support plate and a limit frame on one side of the sealing door, when the sealing door on the starter is locked, the sealing door can be rotated to allow the sealing door to cover the inner cavity of the starter body, and then the limit frame is slid inside the support plate, the limit frame is inserted into the cavity inside the limit seat, and the limit frame is meshed with the gear inside the cavity through the teeth, and then the annular limit plate is screwed, and the threaded column installed on the annular limit plate is installed in the anti-rotation shaft, and the position of the annular limit plate is adjusted to allow the annular limit plate to move toward the annular end plate. At the same time, the moving annular limit plate pushes the drive plate to move, and the drive plate is pressed tightly against On the annular end plate, the insertion rod installed on the driving plate passes through the insertion hole and is inserted in the slot to limit the position of the annular end plate and the anti-rotation shaft, prevent the anti-rotation shaft and the gear from rotating, and limit the position of the limit frame, thereby completing the locking of the sealing door. The position of the limit frame can be limited by the cooperation of gears and teeth, so that the limit frame presses the sealing door tightly against the opening of the starter inner cavity to prevent the formation of a gap between the sealing door and the starter, and avoids the situation where the external humid air and dust enter the interior through the gap due to the gap between the sealing door and the starter to corrode the electrical components, thereby ensuring the use of the starter and improving the sealing effect of the sealing door. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of a mine flameproof vacuum electromagnetic starter according to an embodiment of the utility model;

[0016] Figure 2 It is a schematic diagram of the connection between the limit frame and the support plate according to an embodiment of the utility model;

[0017] Figure 3 It is a schematic diagram of the connection between the limit frame and the limit seat according to an embodiment of the utility model;

[0018] Figure 4 It is a schematic diagram of the disassembly of the annular end plate, the annular limiting plate and the driving plate according to one embodiment of the utility model.

[0019] In the figure: 1. starter body; 101. slot; 11. limit seat; 111. cavity; 12. anti-rotation shaft; 13. annular end plate; 131. socket; 14. annular limit plate; 141. threaded column; 15. drive plate; 151. plug rod; 152. threaded groove; 16. gear; 2. sealing door; 201. empty slot; 21. support plate; 211. through slot; 22. limit frame; 221. slot; 222. teeth; 23. baffle. DETAILED DESCRIPTION

[0020] In the description of the present utility model, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof are intended to cover non-exclusive inclusions.

[0021] Combination Figure 1-Figure 4 As shown, the side wall of the starter body 1 is provided with two limit seats 11 distributed up and down, and a cavity 111 is opened inside the limit seat 11, and a stop shaft 12 is rotatably installed at the middle position of the cavity 111, and the stop shaft 12 passes through the limit seat 11 and extends to the outside thereof, and an annular end plate 13 is provided at one end of the outer wall of the stop shaft 12 located outside the limit seat 11, and an annular limit plate 14 is provided on the side of the annular end plate 13 away from the stop shaft 12, and a threaded column 141 is provided at the middle position of the annular limit plate 14, and the threaded column 141 passes through the stop shaft 12 and is threadedly installed inside thereof, and the outer wall of the threaded column 141 is located between the annular limit plate 14 and the annular end plate 13. A driving plate 15 is installed, and a plurality of plug rods 151 are evenly arranged on the side of the outer wall of the driving plate 15 close to the annular end plate 13. The plug rods 151 penetrate the annular end plate 13 and are inserted into the outer wall of the limit seat 11, and a gear 16 is arranged on the outer wall of the stop shaft 12 located inside the cavity 111. A support plate 21 is arranged at a position corresponding to the side wall of the sealing door 2 and the limit seat 11. A limit frame 22 is slidably installed inside the support plate 21. One end of the limit frame 22 close to the limit seat 11 is inserted into the cavity 111 and is mounted on the outside of the gear 16, and a plurality of teeth 222 are evenly arranged on the inner wall of the limit frame 22, and the teeth 222 are meshed with the tooth grooves of the gear 16.

[0022] In one embodiment, when installing the limit frame 22, the limit frame 22 can be inserted into the support plate 21 through the through groove 211, and the limit frame 22 is inserted into the cavity 111 inside the limit seat 11 through the through groove 211, so that the limit frame 22 is meshed with the gear 16 through the teeth 222, and the gear 16 is stored in the card groove 221. The position of the limit frame 22 can be limited by the cooperation between the gear 16 and the teeth 222, and the limit frame 22 can press the sealing door 2 against the opening of the inner cavity of the starter through the baffle 23, thereby completing the locking of the sealing door 2 and changing the locking of the sealing door 2. The sealing door 2 is prevented from shaking easily due to locking the sealing door 2 by means of a locking pin, thereby ensuring the stability of the sealing door 2 after locking. In addition, the baffle plate 23 can be engaged in the empty groove 201 to limit the limit frame 22, thereby preventing the limit frame 22 from being fully inserted into the limit seat 11. When opening the sealing door 2, the staff can pull the limit frame 22 out of the limit seat 11 through the baffle plate 23, thereby preventing the limit frame 22 from being unable to be removed due to being fully inserted into the limit seat 11, thereby facilitating the disassembly of the limit frame 22.

[0023] In one embodiment, when limiting the limit frame 22, the annular limit plate 14 can be screwed, and the threaded column 141 installed on the annular limit plate 14 can be installed inside the anti-rotation shaft 12, and the position of the annular limit plate 14 can be adjusted to allow the annular limit plate 14 to move toward the annular end plate 13. At the same time, the moving annular limit plate 14 pushes the driving plate 15 to move, and the driving plate 15 is pressed against the annular end plate 13, and the insertion rod 151 installed on the driving plate 15 passes through the insertion hole 131 and is inserted into the slot 101 to limit the position of the annular end plate 13 and the anti-rotation shaft 12, preventing the anti-rotation shaft 12 and the gear 16 from rotating, and limiting the position of the limit frame 22, thereby completing the locking of the sealing door 2, and the gear 16 and the teeth 222 can be used to cooperate to limit the position of the limit frame 22, so that the limit frame 22 presses the sealing door 2 against the opening of the inner cavity of the starter through the baffle 23, thereby preventing the formation of a gap between the sealing door 2 and the starter, and improving the sealing effect of the sealing door 2.

[0024] In one embodiment, when the limit frame 22 is inserted into the limit seat 11, the limit frame 22 first surrounds the outside of the gear 16 through the slot 221, and then meshes with the gear 16 through the teeth 222. At the same time, the gear 16 rotates along with the insertion drive stop shaft 12 of the limit frame 22, so that the limit frame 22 can be completely inserted into the inside of the limit seat 11, avoiding the situation that the limit frame 22 meshed with the gear 16 through the teeth 222 cannot be moved due to the inability to rotate, thereby facilitating the installation of the limit frame 22.

[0025] In one embodiment, when opening the sealing door 2, the staff can twist the annular limit plate 14 to remove the threaded column 141 from the threaded groove 152 on the anti-rotation shaft 12 and the drive plate 15, and then pull out the drive plate 15 to disengage the insertion rod 151 from the slot 101, and then rotate the annular end plate 13 to drive the anti-rotation shaft 12 installed thereon to rotate in the cavity 111, and drive the gear 16 installed on the anti-rotation shaft 12 to rotate, so that the gear 16 drives the limit frame 22 engaged with it through the teeth 222 to move, and moves the limit frame 22 to the outer wall of the limit seat 11, so as to complete the unlocking of the sealing door 2, and there will be no more complicated unlocking operation, which avoids the situation that the sealing door 2 needs to be unlocked through a more complicated unlocking operation due to the more complicated lock structure. The structure is simple, the operation is convenient, and the practicality is strong.

[0026] The working principle of the utility model is as follows: when the sealing door 2 is locked, the limit frame 22 can be inserted into the support plate 21 through the through groove 211, and the limit frame 22 can pass through the through groove 211 and be inserted into the cavity 111 inside the limit seat 11, so that the limit frame 22 can mesh with the gear 16 through the teeth 222, and the gear 16 can be stored in the slot 221, and then the annular limit plate 14 can be screwed, and the threaded column 141 installed on the annular limit plate 14 can be installed inside the anti-rotation shaft 12, and the position of the annular limit plate 14 can be adjusted to allow the annular limit plate 14 to move toward the annular end plate 13. At the same time, the moving annular limit plate 14 pushes the driving plate 15 to move, and the driving plate 15 is pressed on the annular end plate 13, so that the drive plate 15 installed on the driving plate 15 can move. The insertion rod 151 on the moving plate 15 passes through the socket 131 and is inserted into the slot 101 to limit the position of the annular end plate 13 and the stop shaft 12, preventing the stop shaft 12 and the gear 16 from rotating, and limiting the position of the limit frame 22, thereby completing the locking of the sealing door 2. The position of the limit frame 22 can be limited by the cooperation of the gear 16 and the teeth 222, so that the limit frame 22 presses the sealing door 2 against the opening of the starter cavity through the baffle 23 to prevent the formation of a gap between the sealing door 2 and the starter, and avoids the situation where the external humid air and dust enter the interior of the sealing door 2 and corrode the electrical components due to the gap between the sealing door 2 and the starter, thereby ensuring the use of the starter and improving the sealing effect of the sealing door 2.

[0027] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mine flameproof vacuum electromagnetic starter, comprising: A starter body (1) and a sealing door (2), characterized in that the side wall of the starter body (1) is provided with two limit seats (11) distributed in an upper and lower manner, a cavity (111) is opened inside the limit seat (11), and a stop shaft (12) is rotatably installed at the middle position of the cavity (111), the stop shaft (12) passes through the limit seat (11) and extends to the outside thereof, an annular end plate (13) is provided at one end of the outer wall of the stop shaft (12) located outside the limit seat (11), an annular limit plate (14) is provided on the side of the annular end plate (13) away from the stop shaft (12), a threaded column (141) is provided at the middle position of the annular limit plate (14), the threaded column (141) passes through the stop shaft (12) and is threadedly installed inside thereof, and the outer wall of the threaded column (141) is located between the annular limit plate (14) and the annular end plate (13). A driving plate (15) is threadedly mounted between the driving plate (15), a plurality of plug rods (151) are evenly arranged on the outer wall of the driving plate (15) close to the annular end plate (13), the plug rods (151) penetrate the annular end plate (13) and are plugged into the outer wall of the limit seat (11), and a gear (16) is arranged on the outer wall of the stop shaft (12) located inside the cavity (111), and the side wall of the sealing door (2) is connected to the limit seat (11). A support plate (21) is arranged at a position corresponding to the position seat (11), a limit frame (22) is slidably installed inside the support plate (21), one end of the limit frame (22) close to the limit seat (11) is inserted into the interior of the cavity (111) and is sleeved on the outside of the gear (16), and a plurality of teeth (222) are evenly arranged on the inner wall of the limit frame (22), and the teeth (222) are meshed with the tooth grooves of the gear (16).

2. A mine flameproof vacuum electromagnetic starter according to claim 1, characterized in that: A slot (221) is provided inside the limiting frame (22), and the limiting frame (22) is sleeved onto the outside of the gear (16) through the slot (221).

3. A mine flameproof vacuum electromagnetic starter according to claim 1, characterized in that: A through slot (211) is provided inside the support plate (21), and the limiting frame (22) passes through the through slot (211) and is inserted into the inside of the limiting seat (11).

4. A mine flameproof vacuum electromagnetic starter according to claim 3, characterized in that: A baffle (23) for driving the limit frame (22) to move is provided at one end of the limit frame (22) away from the limit seat (11), and the end surface area of ​​the baffle (23) is larger than the opening area of ​​the through slot (211).

5. The flameproof vacuum electromagnetic starter for mining according to claim 1, characterized in that: The side wall of the sealing door (2) is provided with a hollow groove (201) on one side of the support plate (21), and the support plate (21) is snap-fitted and installed inside the hollow groove (201) and closely attached to the end surface of the support plate (21).

6. A mine flameproof vacuum electromagnetic starter according to claim 1, characterized in that: A slot (101) and a plug hole (131) are respectively provided at positions corresponding to the limit seat (11), the annular end plate (13) and the plug rod (151); the plug rod (151) passes through the plug hole (131) and is plugged into the slot (101).

7. A mine flameproof vacuum electromagnetic starter according to claim 1, characterized in that: A thread groove (152) is provided at the middle position of the driving plate (15), and the thread column (141) is threadably mounted inside the driving plate (15) through the thread groove (152).

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