Stop button time-delay device of coal mine explosion-proof vacuum starter

Abstract

The utility model belongs to the technical field of coal mine starter control, and aims to solve the problem that an isolation change-over switch is inconvenient to operate by a single hand during starter operation. The utility model provides a stop button time-delay device of a coal mine explosion-proof vacuum starter. A body is installed between a stop button and a stop button operation device of the starter. The stop button operating device is connected to the tail end of the piston rod, the piston rod movably penetrates through the body, the front end of the piston rod extends to the outer side of the body, the front end of the piston rod is used for pressing down the stop button, an air outlet and an air inlet are formed in the body, a one-way valve is arranged at the air outlet, and an adjusting piece for adjusting the air inflow is arranged at the air inlet; the end portion, close to the stop button, of the piston rod is connected with a first locking piece, and the first locking piece can be engaged with or separated from a second locking piece on the isolation change-over switch. According to the device, the springback delay of the stop button can be realized, and the isolation change-over switch can be operated by two hands after the stop button is pressed down.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine starter control technology, specifically relating to a stop button delay device for a coal mine explosion-proof vacuum starter. Background Technology

[0002] Starters are widely used in coal mines. There is one thing to note when operating them: the isolating switch must be operated only after pressing the stop button. That is, when powering on, the isolating switch must be powered on first and then the vacuum contactor must be closed; when powering off, the vacuum contactor must be disconnected first and then the isolating switch must be disconnected.

[0003] like Figure 5 As shown, the above operation must be performed with both hands simultaneously. One hand presses the stop button, and the other hand operates the isolating reversing switch. In underground environments, due to environmental limitations, the difficulty of operating the isolating switch, or the operator's lack of strength, it is sometimes necessary to ask another person to help operate it, which is very inconvenient.

[0004] The investigation revealed that the cause was that once the stop button was pressed and the hand was released, the button immediately returned to its original position, restricting the operation of the isolating switch. Therefore, there is an urgent need for a device that allows the stop button to remain in the stop position for a short while, in order to solve the problem of having to use both hands to operate different parts of the starter. Utility Model Content

[0005] In order to solve at least one of the above-mentioned technical problems in the prior art, this utility model provides a delay device for the stop button of a coal mine explosion-proof vacuum starter.

[0006] This utility model is achieved using the following technical solution: a stop button delay device for a coal mine explosion-proof vacuum starter, comprising a body, a stop button operating device, a spring, a piston rod, and a piston plate; the body is installed between the starter's stop button and the stop button operating device; the stop button operating device is connected to the end of the piston rod via a plate-like structure, the spring is connected between the body and the plate-like structure, the piston rod is movably inserted through the body and its front end extends to the outside of the body, the front end of the piston rod is used to press down the stop button, the body has an internal cavity, the cavity is divided into two parts by the piston plate set on the piston rod, the body is provided with an air outlet and an air inlet, the part of the cavity near the stop button is connected to the outside through the air outlet and the air inlet, the air outlet is provided with a one-way valve and can only exhaust air from the cavity to the outside, the air inlet is provided with an adjusting element for adjusting the air intake; a first locking plate is connected to the side wall of the piston rod near the stop button, the first locking plate can engage or disengage with a second locking plate on the isolating reversing switch.

[0007] Preferably, the adjusting component is an adjusting screw, and a threaded hole is provided on the body corresponding to the position of the adjusting screw. The threaded hole is connected to the air inlet. By changing the depth of the adjusting screw into the air inlet, the air intake in the cavity is adjusted, thereby controlling the time required for the first locking plate and the second locking plate to go from the separated state to the re-engaged state.

[0008] Preferably, the stop button operating device is a rod-shaped structure located on the outside of the starter body and on the same side as the isolating reversing switch handle.

[0009] Preferably, the piston plate is an umbrella-shaped piston plate, and a rubber diaphragm is provided at the end of the piston plate near the stop button, and a piston seal is provided at the sliding connection between the piston rod and the body.

[0010] Preferably, the axes of the air outlet and air inlet are parallel to the axis of the piston rod, and the axis of the threaded hole is perpendicular to the axis of the air inlet.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This device can achieve a rebound delay of the stop button, thereby increasing the time required for the first and second locking plates to go from the separated state to the re-engaged state. After pressing the stop button, the isolation reversing switch can be operated with both hands, avoiding the inconvenience of operating the isolation switch with one hand. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0015] Figure 2 This is a schematic diagram of the installation position in this embodiment (when the first locking plate and the second locking plate are engaged);

[0016] Figure 3 This is a schematic diagram of the installation position in this embodiment (when the first locking plate and the second locking plate are separated);

[0017] Figure 4 This is a schematic diagram of the stop button's rebound process in this embodiment;

[0018] Figure 5 This is a schematic diagram illustrating the linkage between the stop button and the isolating reversing switch in the background technology.

[0019] In the diagram: 1-body; 1.1-air outlet; 1.2-air inlet; 2-stop button operating device; 3-spring; 4-piston rod; 5-piston plate; 6-plate structure; 7-adjusting component; 8-rubber diaphragm; 9-piston seal; 10-stop button; 11-isolation reversing switch; 12-first locking plate; 13-second locking plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described in conjunction with 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 implementation methods obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should fall within the scope of the technical content disclosed in this utility model. It should be noted that in this specification, relational terms such as "first" and "second" are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0022] This utility model provides an embodiment:

[0023] like Figures 1 to 4 As shown, a stop button delay device for a coal mine explosion-proof vacuum starter includes a body 1, a stop button operating device 2, a spring 3, a piston rod 4, and a piston plate 5. The body 1 is installed between the starter's stop button and the stop button operating device 2. The stop button operating device 2 is connected to the end of the piston rod 4 via a plate-like structure 6. The spring 3 is connected between the body 1 and the plate-like structure 6. The piston rod 4 is movably inserted through the body 1, with its front end extending to the outside of the body 1. The front end of the piston rod 4 is used to press down the stop button. The body 1 has an internal cavity. The cavity is divided into two parts by a piston plate 5 set on the piston rod 4. The main body 1 is provided with an air outlet 1.1 and an air inlet 1.2. The part of the cavity near the stop button is connected to the outside through the air outlet 1.1 and the air inlet 1.2. A one-way valve is provided at the air outlet 1.1 and exhaust can only be discharged from the cavity. An adjusting element 7 for adjusting the intake air volume is provided at the air inlet 1.2. A first locking plate is connected to the end side wall of the piston rod 4 near the stop button. The first locking plate can engage or disengage with the second locking plate on the isolating reversing switch.

[0024] In this embodiment, the stop button operating device 2 is a rod-shaped structure located on the outside of the starter body and on the same side as the isolating reversing switch handle. The axes of the air outlet 1.1 and the air inlet 1.2 are parallel to the axis of the piston rod 4, and the axis of the threaded hole is perpendicular to the axis of the air inlet 1.2.

[0025] The piston plate 5 is an umbrella-shaped piston plate, and a rubber diaphragm 8 is provided at the end of the piston plate 5 near the stop button. A piston seal 9 is provided at the sliding connection between the piston rod 4 and the body 1. The rubber diaphragm 8 and the piston seal 9 serve to seal the cavity during the movement of the piston rod.

[0026] The adjusting component 7 is an adjusting screw. The body 1 has a threaded hole at the position corresponding to the adjusting screw, and the threaded hole is connected to the air inlet 1.2. By changing the depth of the adjusting screw into the air inlet 1.2, the air intake in the cavity is adjusted, thereby controlling the time required for the first locking plate and the second locking plate to go from the separated state to the re-engaged state.

[0027] Working principle:

[0028] Figure 2 This is the locked state when the stop button is not pressed; at this time, the isolating reversing switch cannot be operated arbitrarily because the first locking piece 12 and the second locking piece 13 are engaged with each other.

[0029] When a stop is required, pressing the stop button 2 compresses the spring 3, causing the piston rod 5 to move towards the stop button 10. Under the action of the piston rod 4 and piston plate 5, gas is rapidly exhausted from the cavity through the vent hole 1.1. After the stop button 10 is pressed to the desired position, its normally closed contact opens, cutting off the starter's starting circuit.

[0030] At this point, since the interlocking parts of the first locking plate 12 and the second locking plate 13 have separated, the isolating reversing switch 11 can be operated, such as... Figure 3 As shown.

[0031] When the stop button is released, the piston rod 5 moves away from the stop button 10 under the tension of the spring 3. However, due to the negative pressure inside the cavity, the piston rod 5 cannot move downwards quickly. Only when air enters the cavity through the adjusting element 7 can the piston rod 5 move towards the stop button 2, and its downward movement will be slower. By adjusting the adjusting element 7, the piston rod 5 can move for 3-15 seconds. In other words, it takes 3-15 seconds for the first locking plate 12 and the second locking plate 13 to re-engage from disengagement. This allows us to use these 3-15 seconds to operate the isolating reversing switch 11 with both hands, making operation more convenient. Figure 4 As shown.

[0032] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A time delay device for a stop button of an explosion-proof vacuum starter for coal mines, characterized in that: The device comprises a body (1), a stop button operating device (2), a spring (3), a piston rod (4) and a piston sheet (5); The body (1) is installed between the stop button of the starter and the stop button operating device (2); the stop button operating device (2) is connected to the end of the piston rod (4) through a sheet structure (6); the spring (3) is connected between the body (1) and the sheet structure (6); the piston rod (4) is movably arranged in the body (1) and protrudes out of the body (1) at the front end; the front end of the piston rod (4) is used to press down the stop button; the body (1) has a cavity inside, which is divided into two parts by the piston sheet (5) arranged on the piston rod (4); the body (1) is provided with an air outlet hole (1.1) and an air inlet hole (1.2); the part of the cavity close to the stop button is communicated with the outside through the air outlet hole (1.1) and the air inlet hole (1.2); a one-way valve is arranged at the air outlet hole (1.1) and can only discharge air from the cavity to the outside; an adjusting member (7) for adjusting the air inlet amount is arranged at the air inlet hole (1.2); the end of the piston rod (4) close to the stop button is connected with a first locking sheet, which can engage or disengage with a second locking sheet on the isolation reversing switch.

2. The stop button delay device of the coal mine explosion-proof vacuum starter according to claim 1, characterized in that: The adjusting member (7) is an adjusting screw, and the body (1) is provided with a threaded hole corresponding to the position of the adjusting screw, and the threaded hole is communicated with the air inlet hole (1.2); by changing the depth of the adjusting screw screwed into the air inlet hole (1.2), the air inlet amount in the cavity is adjusted, and the time required for the first locking sheet and the second locking sheet to change from the disengaged state to the re-engaged state is controlled.

3. The stop button delay device of the coal mine explosion-proof vacuum starter according to claim 1, characterized in that: The stop button operating device (2) is a rod-shaped structure, which is located on the outside of the starter body and on the same side as the handle of the isolation reversing switch.

4. The stop button delay device of the coal mine explosion-proof vacuum starter according to claim 1, characterized in that: The piston sheet (5) is an umbrella-shaped piston sheet, and the end of the piston sheet (5) close to the stop button is provided with a rubber film (8); the sliding connection between the piston rod (4) and the body (1) is provided with a piston seal (9).

5. The stop button delay device of the coal mine explosion-proof vacuum starter according to claim 2, characterized in that: The axes of the air outlet hole (1.1) and the air inlet hole (1.2) are parallel to the axis of the piston rod (4), and the axis of the threaded hole is perpendicular to the axis of the air inlet hole (1.2).

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