Vacuum electromagnetic starter for coal mine fan

Abstract

The utility model discloses a vacuum electromagnetic starter for a coal mine fan, and relates to the technical field of vacuum electromagnetic starters, the vacuum electromagnetic starter comprises a starter box body and a starter body installed in the starter box body, one side of the starter box body is connected with a positioning plate and a guide frame; a limiting barrel is connected into the guide frame and installed in the positioning plate, a through hole is formed in the guide frame, a movable rod is slidably connected into the through hole, and a clamping block is driven by the movable rod to be matched with a clamping groove of a handle, so that the handle can only rotate forwards to start the starter in a normal state and cannot rotate backwards. Meanwhile, when the starter needs to be maintained and repaired and the handle needs to be reversely rotated, the handle can be normally reversely rotated, and the problems that when the starter normally works, the operating handle is pulled to a reverse rotation gear due to misoperation of personnel, and consequently equipment is low in efficiency and even damaged are solved; and the practical performance of the vacuum electromagnetic starter can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum electromagnetic starter technology, specifically a vacuum electromagnetic starter for coal mine fans. Background Technology

[0002] The vacuum electromagnetic starter for coal mine fans is a commonly used combination electrical appliance in mines. It is mainly used to control and protect the motor and is an important electrical device in the mining industry.

[0003] When the electrical equipment is operating normally, the starter is in the forward rotation position when the operating handle is turned. During maintenance, it is sometimes necessary to reverse the position. In case of misoperation, the operating handle is easily moved to the reverse position, which can easily cause the equipment to become inefficient or even damaged, resulting in poor performance of the vacuum electromagnetic starter. Utility Model Content

[0004] To address the above problems, this utility model provides a vacuum electromagnetic starter for coal mine fans, which solves the aforementioned issues.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vacuum electromagnetic starter for coal mine fans, comprising a starter housing and a starter body installed inside the starter housing, wherein the starter housing has three chambers inside, three doors are hinged to one side of the starter housing, and a positioning plate and a guide frame are connected to one side of the starter housing;

[0006] The guide frame is internally connected to a limiting cylinder, which is installed inside the positioning plate. The guide frame has a through hole, and a moving rod is slidably connected inside the through hole. A retaining handle is fixedly connected to the outside of the moving rod.

[0007] The limiting cylinder is equipped with a telescopic spring inside, and the limiting cylinder is slidably connected to the moving rod. One end of the moving rod is located on one side of the telescopic spring.

[0008] Preferably, a locking block is fixedly connected to the other end of the movable rod.

[0009] Preferably, a guide plate is fixedly connected to the bottom of the guide frame, and an anti-rotation groove is provided on the guide plate.

[0010] Preferably, a handle for controlling the starter switch is connected to one side of the starter housing, and the handle has a slot that cooperates with the locking block.

[0011] Preferably, a connecting plate is connected to the top of the guide frame, and a positioning groove is provided on one side of the connecting plate.

[0012] Preferably, a base is fixedly connected to the bottom of the starter housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This application utilizes a movable lever to engage the locking block and the handle's locking slot, ensuring that the handle can only rotate forward to start the starter under normal conditions and cannot rotate in reverse. Simultaneously, when maintenance or repair of the starter requires reversing the handle, it can be reversed normally. This solves the problem of personnel accidentally moving the operating handle to the reverse position during normal operation, leading to low equipment efficiency or even damage. This improves the practical performance of the vacuum electromagnetic starter. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the starter operation of this utility model;

[0017] Figure 3 This is a partial structural schematic diagram of the present invention;

[0018] Figure 4 This is a schematic diagram of the structure of this utility model during forward rotation;

[0019] Figure 5 This is a schematic diagram of the structure of this utility model during reversal;

[0020] Figure 6 This is a schematic cross-sectional view of the limiting cylinder of this utility model.

[0021] The diagram shows the following labels: 1. Starter housing; 2. Base; 3. Door; 4. Positioning plate; 5. Guide frame; 6. Limiting cylinder; 7. Telescopic spring; 8. Moving rod; 9. Handle; 10. Block; 11. Handle; 12. Slot; 13. Guide plate; 14. Anti-rotation slot; 15. Connecting plate; 16. Positioning slot. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] Please see Figures 1 to 6 A vacuum electromagnetic starter for coal mine fans includes a starter housing 1 and a starter body installed inside the starter housing 1. The starter housing 1 has three chambers inside, and three doors 3 are hinged to one side of the starter housing 1. The operation mode of the starter body is as follows: Figure 2The power supply voltage is sampled via a voltage fluctuation sampling circuit. When the sampled voltage is higher than 0.7Ue (Ue is the rated voltage) and lower than 1.15Ue, it is in normal working condition. The microcontroller control system disables the electronic switch circuit and the energy storage capacitor is in a charging state. When the sampled voltage is lower than 0.6Ue, and the voltage fluctuation function is enabled (i.e., an abnormal shutdown command), a voltage fluctuation fault is considered to have occurred. The microcontroller controls the electronic switch to open, simultaneously disconnecting the energy storage circuit. The backup power system supplies power to the microcontroller system and coil, keeping the contactor in the energized state. At this time, the sampling circuit continues to sample the power supply voltage. If the voltage fluctuation ends and returns to normal within the specified time, the microcontroller... The microcontroller prohibits the electronic switch circuit from being activated while the energy storage capacitor is in a charging state. In addition, this module can communicate bidirectionally with the host computer. The host computer can remotely control and adjust the connection, disconnection and anti-power drop time of the intelligent control module. The slave computer can transmit signals such as the current contactor status, anti-power drop time, and whether power drop has occurred to the host computer. When using the vacuum electromagnetic starter, first insert the cable into the top cover through the interface at the top of the starter housing 1, and then connect the cable to the starter. The starter is set in the starter housing 1, and the door 3 on one side of the starter housing 1 allows personnel to easily maintain and repair the interior. A positioning plate 4 and a guide frame 5 are connected to one side of the starter housing 1.

[0024] The guide frame 5 is internally connected to a limiting cylinder 6, which is installed inside the positioning plate 4. The guide frame 5 has a through hole, and a moving rod 8 is slidably connected inside the through hole. The moving rod 8 is externally fixedly connected to a handle 9.

[0025] The limiting cylinder 6 is equipped with a telescopic spring 7 inside. The limiting cylinder 6 is slidably connected to the moving rod 8. One end of the moving rod 8 is located on one side of the telescopic spring 7, and the other end of the moving rod 8 is fixedly connected to a locking block 10. The bottom of the guide frame 5 is fixedly connected to a guide plate 13, which has an anti-rotation groove 14. When the starter is in normal use, the telescopic spring 7 in the limiting cylinder 6 will push the moving rod 8 and the locking block 10, so that the locking block 10 is inserted into the slot 12. It should be noted that the inside of the slot 12 is an inclined surface, and the locking block 10 is also an inclined block. At this time, when the operator rotates the handle 11 forward, the handle 11 will rotate towards the rear of the starter housing 1. When the slot 12 rotates, due to the sliding of the inclined surface and the inclined block, the locking block 10 will move out of the slot. Inside the slot 12, when the handle 11 is rotated to a specific position, the new slot 12 will rotate to the position where it engages with the block 10. At this time, under the influence of the telescopic spring 7, the moving block 18 will drive the block 10 to push into the inside of the slot 12, so that the block 10 and the slot 12 will not affect the normal forward rotation of the handle 11. When the handle 11 is accidentally reversed by the operator, the plane in the slot 12 will collide with the plane of the block 10 due to the influence of the rotation direction, so that the block 10 cannot move out of the slot 12, thereby achieving the effect that the handle 11 cannot be reversed. This prevents the starter from being operated to the reverse position by the operator due to the operator's mistake, which would lead to low efficiency or even damage to the equipment.

[0026] A handle 11 for controlling the starter switch is connected to one side of the starter housing 1. The handle 11 has a slot 12 that cooperates with the locking block 10.

[0027] A connecting plate 15 is connected to the top of the guide frame 5. A positioning groove 16 is provided on one side of the connecting plate 15. The latch 9 does not function when the starter is working normally. When the handle 11 needs to be reversed, the operator manually holds the latch 9 to separate the latch block 10 from the slot 12 and moves the latch 9 to the positioning groove 16. Then, the latch 9 is rotated into the interior of the positioning groove 16. Next, the latch 9 is moved to the transverse groove of the positioning groove 16. It should be noted that the latch 9 is normally located inside the anti-rotation groove 14 of the guide plate 13 to prevent the moving rod 8 from rotating when the handle 11 is turned forward and the latch block 10 is between the two slots 12.

[0028] A base 2 is fixedly connected to the bottom of the starter housing 1.

[0029] When using this utility model:

[0030] First, when using the vacuum electromagnetic starter, insert the cable into the top cover through the interface at the top of the starter housing 1, and then connect the cable to the starter. The starter is installed in the starter housing, and the door on one side of the starter housing makes it convenient for personnel to maintain and repair the interior.

[0031] Secondly, when the starter is in normal use, the telescopic spring 7 in the limit cylinder 6 will push the moving rod 8 and the locking block 10, so that the locking block 10 is inserted into the inside of the locking slot 12. It should be noted that the inside of the locking slot 12 is an inclined surface, and the locking block 10 is also an inclined block. At this time, when the operator turns the handle 11 forward, the handle 11 will rotate towards the rear of the starter housing 1. When the locking slot 12 rotates, due to the sliding of the inclined surface and the inclined block, the locking block 10 will move out of the inside of the locking slot 12.

[0032] Then, when the handle 11 is rotated to a specific position, the new slot 12 will rotate to the position where it engages with the block 10. At this time, under the influence of the telescopic spring 7, the moving block 18 will drive the block 10 to push into the inside of the slot 12, so as to achieve the effect that the block 10 and the slot 12 will not affect the normal forward rotation of the handle 11.

[0033] Finally, when the operator accidentally reverses the handle 11, the plane in the slot 12 abuts against the plane of the block 10 due to the influence of the rotation direction, making it impossible for the block 10 to move out of the slot 12. This prevents the handle 11 from being reversed, thus preventing the starter from being moved to the reverse position by the operator due to accidental operation, which would lead to low efficiency or even damage to the equipment.

[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. A vacuum electromagnetic starter for coal mine fans, comprising a starter housing (1) and a starter body installed inside the starter housing (1), characterized in that: The starter housing (1) has three chambers inside. Three doors (3) are hinged to one side of the starter housing (1). A positioning plate (4) and a guide frame (5) are connected to one side of the starter housing (1). The guide frame (5) is internally connected to a limiting cylinder (6), the limiting cylinder (6) is installed inside the positioning plate (4), the guide frame (5) has a through hole, a moving rod (8) is slidably connected inside the through hole, and a handle (9) is fixedly connected to the outside of the moving rod (8). The limiting cylinder (6) is provided with a telescopic spring (7) inside. The limiting cylinder (6) is slidably connected to the moving rod (8). One end of the moving rod (8) is located on one side of the telescopic spring (7).

2. The vacuum electromagnetic starter for coal mine fans according to claim 1, characterized in that: The other end of the moving rod (8) is fixedly connected to a locking block (10).

3. The vacuum electromagnetic starter for coal mine fans according to claim 1, characterized in that: The bottom of the guide frame (5) is fixedly connected to a guide plate (13), and the guide plate (13) is provided with an anti-rotation groove (14).

4. A vacuum electromagnetic starter for coal mine fans according to claim 1, characterized in that: A handle (11) for controlling the starter switch is connected to one side of the starter housing (1), and the handle (11) has a slot (12) that cooperates with the locking block (10).

5. A vacuum electromagnetic starter for coal mine fans according to claim 1, characterized in that: The top of the guide frame (5) is connected to a connecting plate (15), and a positioning groove (16) is provided on one side of the connecting plate (15).

6. A vacuum electromagnetic starter for coal mine fans according to claim 1, characterized in that: The bottom of the starter housing (1) is fixedly connected to a base (2).

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