Scram alarm device of scraper conveyor

Abstract

The utility model provides a scram alarm device of a scraper conveyor, which belongs to the field of coal mine electromechanical transportation and comprises a first broadcast telephone, a second broadcast telephone, a direct-current relay ZJ, a magnetic switch and an alarm box, and the magnetic switch comprises a contactor KM, a relay KA1, a relay KA2 and a start button QA. A scram button S1 on the first broadcast telephone, a scram button S2 on the second broadcast telephone and a coil of a direct-current relay ZJ are connected in series and then connected to the two ends of a first direct-current power source, one end of a coil of a relay KA2 is connected with one end of a second direct-current power source, and the other end of the coil of the relay KA2 is connected to one end of a start button QA and one end of a normally open contact KM1 of a contactor KM. The other end of the start button QA is connected with the other end of the normally open contact KM1 of the contactor KM and then connected to one end of the normally open contact ZJ2 of the direct-current relay ZJ, and the other end of the normally open contact ZJ2 of the direct-current relay ZJ is connected with the other end of the second direct-current power supply; and timely stopping of the scraper conveyor is realized.

Description

Technical Field

[0001] This utility model relates to the field of coal mine electromechanical transportation technology, and in particular to an emergency stop alarm device for scraper conveyors. Background Technology

[0002] The start-up and stop of the scraper conveyor at the tunneling face are usually controlled by marking the tail end and the driver pressing the stop button at the head end. However, the noise generated by the scraper conveyor during operation or when the overlapping belt is running can affect the stopping time. If steel anchor bolts or other iron objects enter the scraper conveyor at the production face, and the conveyor cannot be stopped in time, it will block the unloading point of the scraper conveyor, preventing the coal and rock on the scraper conveyor belt from being pulled away. This can bury the tail end of the conveyor, damage the scraper conveyor, cause personnel injury, and affect production. Utility Model Content

[0003] The technical problem to be solved by this utility model is how to achieve timely stopping of the scraper conveyor.

[0004] This utility model solves the above-mentioned technical problems through the following technical solution: an emergency stop alarm device for a scraper conveyor, the device including a first broadcast telephone, a second broadcast telephone, a DC relay ZJ, a magnetic start switch, and an alarm box. The magnetic start switch includes a contactor KM, a relay KA1, a relay KA2, and a start button QA. The coils of the emergency stop buttons S1 and S2 on the first and second broadcast telephones, and the DC relay ZJ are connected in series to the two ends of a first DC power supply. One end of the coil of relay KA2 is connected to one end of a second DC power supply, and the other end of the coil of relay KA2 is connected to one end of the start button QA and one end of the normally open contact KM1 of contactor KM. The other end of the start button QA is connected to the other end of the normally open contact KM1 of contactor KM and then connected to the DC relay. One end of the normally open contact ZJ2 of electrical relay ZJ is connected to the other end of the second DC power supply. One end of the coil of relay KA1 is connected to one end of the normally open contact KA1-1 of relay KA1 and connected to one end of the third DC power supply. The other end of the coil of relay KA1 is connected to one end of the normally open contact KA2-1 of relay KA2. The other end of the normally open contact KA1-1 of relay KA1 is connected to one end of the coil of contactor KM. The other end of the coil of contactor KM is connected to the other end of the normally open contact KA2-1 of relay KA2 and connected to the other end of the third DC power supply. The normally closed contact ZJ1 of DC relay ZJ is connected in series with the alarm box and then connected to the two ends of the fourth DC power supply. The scraper conveyor is connected in series with the other normally open contact of contactor KM.

[0005] In this invention, if steel anchor bolts or other iron objects enter the scraper conveyor during operation, the operator can operate the emergency stop lock knob on the public address system at the tail or head of the conveyor to the emergency stop lock position. This disconnects emergency stop button S1 or S2, de-energizes the coil of DC relay ZJ, opens the normally open contact ZJ2 of DC relay ZJ, de-energizes the coil of relay KA2, opens the normally open contact KA2-1 of relay KA2, de-energizes the coil of relay KA1, opens the relay KA1-1, de-energizes the coil of contactor KM, and opens the other normally open contact of contactor KM. This allows the scraper conveyor to stop promptly, preventing debris from entering the bottom of the scraper conveyor or onto the belt conveyor, thus avoiding electromechanical accidents caused by blockage at the unloading point. Simultaneously, the normally closed contact ZJ1 of DC relay ZJ remains closed, activating the alarm box and triggering an alarm to remind the operator to promptly handle the debris on the scraper conveyor.

[0006] Preferably, the first broadcast telephone is located at the head of the scraper conveyor, and the second broadcast telephone is located at the tail of the scraper conveyor.

[0007] Preferably, the device further includes a stop button TA, and the other end of the normally open contact ZJ2 of the DC relay ZJ is connected in series with the stop button TA and then connected to one end of the second power supply.

[0008] Preferably, the first DC power supply is 12V, the second DC power supply is 24V, the third DC power supply is 36V, and the fourth DC power supply is 127V.

[0009] Preferably, the model of the broadcast telephone is KTK118.

[0010] Preferably, the magnetic starter switch is model QJZ6-200.

[0011] Preferably, the alarm box is an audible and visual alarm box, model KXB127.

[0012] The advantages provided by this utility model are:

[0013] (1) In the operation of the scraper conveyor, if steel strip anchor rods or other iron objects enter the scraper conveyor, the staff can operate the emergency stop lock knob on the broadcast telephone at the tail or head of the scraper conveyor to the emergency stop lock position, so that the emergency stop button S1 or emergency stop button S2 is disconnected, the coil of DC relay ZJ is de-energized, the normally open contact ZJ2 of DC relay ZJ is disconnected, the coil of relay KA2 is de-energized, the normally open contact KA2-1 of relay KA2 is disconnected, the coil of relay KA1 is de-energized, the relay KA1-1 is disconnected, the coil of contactor KM is de-energized, and the other normally open contact of contactor KM is disconnected, so as to realize the timely stop of the scraper conveyor, avoid the debris from entering the bottom of the scraper conveyor or the belt conveyor, and thus avoid electromechanical accidents caused by blockage at the unloading point. At the same time, the normally closed contact ZJ1 of DC relay ZJ remains closed, the alarm box is turned on and an alarm is issued to remind the staff to deal with the debris on the scraper conveyor in time.

[0014] (2) The scraper conveyor emergency stop alarm device of this utility model has been successfully promoted and applied in working faces such as 1222(1), 1315(1), and 1511(1), eliminating equipment damage and personal injury to workers caused by untimely stopping, and creating nearly 2 million yuan in safety and economic benefits every year. Attached Figure Description

[0015] Figure 1 Circuit diagram of the scraper conveyor emergency stop alarm device provided in this embodiment of the utility model;

[0016] Figure 2 Another circuit diagram of the scraper conveyor emergency stop alarm device provided in this embodiment of the utility model;

[0017] Figure 3 Another circuit diagram of the scraper conveyor emergency stop alarm device provided in this embodiment of the utility model;

[0018] Figure 4 Another circuit diagram of the scraper conveyor emergency stop alarm device provided in this embodiment of the utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model are described clearly and completely below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] like Figure 1As shown, this embodiment provides an emergency stop alarm device for a scraper conveyor, including two public telephones, a DC relay ZJ, a magnetic switch, and an alarm box 10. The two public telephones are located at the head and tail of the scraper conveyor, respectively. Each public telephone is equipped with an emergency stop button. The public telephone at the head of the conveyor is equipped with an emergency stop button S1, and the public telephone at the tail of the conveyor is equipped with an emergency stop button S2. The magnetic switch includes a contactor KM, relays KA1 and KA2, a start button QA, and a stop button TA. The coils of emergency stop buttons S1 and S2 and the DC relay ZJ are connected in series to the two ends of a 12V power supply. One end of the coil of relay KA2 is connected to the positive terminal of a 24V power supply, and the other end of the coil of relay KA2 is connected to one end of the start button QA and one end of the normally open contact KM1 of contactor KM. The other end of the start button QA is connected to the contactor KM1. The other end of the normally open contact KM1 of relay M is connected to one end of the normally open contact ZJ2 of DC relay ZJ. The other end of the normally open contact ZJ2 of DC relay ZJ is connected in series with the stop button TA and then connected to the negative terminal of the 24V power supply. One end of the coil of relay KA1 is connected to one end of the normally open contact KA1-1 of relay KA1 and then connected to the positive terminal of the 36V power supply. The other end of the coil of relay KA1 is connected to one end of the normally open contact KA2-1 of relay KA2. The other end of the normally open contact KA1-1 of relay KA1 is connected to one end of the coil of contactor KM. The other end of the coil of contactor KM is connected to the other end of the normally open contact KA2-1 of relay KA2 and then connected to the negative terminal of the 36V power supply. The normally closed contact ZJ1 of DC relay ZJ is connected in series with alarm box 10 and then connected to both ends of the 127V power supply. The scraper conveyor is connected in series with the other normally open contact of contactor KM. The 12V, 24V, 36V, and 127V power supplies are all located in the same power supply box.

[0021] When the scraper conveyor needs to be started, the operator at the tail end turns the emergency stop interlock knobs on both the head and tail ends to the closed position, keeping emergency stop buttons S1 and S2 normally closed. At this time, the circuit containing the coil of DC relay ZJ is closed, the coil of DC relay ZJ is energized, and the normally open contact ZJ2 of DC relay ZJ closes to prepare for start-up. When the start signal of the scraper conveyor is received, after observing that there are no personnel around, the start button QA is pressed. The coil of relay KA2 is energized, and the normally open contact KA2-1 of relay KA2 closes. The coil of relay KA1 is energized, and the normally open contact KA1-1 of relay KA1 closes. The coil of contactor KM is energized, and the other normally open contact of contactor KM closes. The circuit containing the scraper conveyor is connected and running. The normally open contact KM1 of contactor KM closes to achieve self-locking.

[0022] If steel strip anchors or other iron objects enter the scraper conveyor during operation, the operator should immediately operate the emergency stop interlock knob on the telephone at the tail or head of the conveyor to the emergency stop interlock position. This will disconnect emergency stop button S1 or S2, de-energize the coil of DC relay ZJ, open the normally open contact ZJ2 of DC relay ZJ, de-energize the coil of relay KA2, open the normally open contact KA2-1 of relay KA2, de-energize the coil of relay KA1, open the relay KA1-1, de-energize the coil of contactor KM, and open the other normally open contact of contactor KM. This will stop the scraper conveyor in time, preventing debris from entering the bottom of the scraper conveyor or the belt conveyor, thus avoiding electromechanical accidents caused by blockage at the unloading point. At the same time, the normally closed contact ZJ1 of DC relay ZJ remains closed, and alarm box 10 is activated to sound an alarm, reminding the operator to deal with the debris on the scraper conveyor in a timely manner.

[0023] In this utility model's emergency stop alarm device for scraper conveyors, the alarm box 10 is a KXB127 audible and visual alarm box, the broadcast telephone is a KTK118, and the magnetic start switch is a QJZ6-200. The existing broadcast telephone and its power cord are modified by adding a 12V DC relay ZJ. Utilizing the normally closed position of the broadcast telephone's emergency stop interlock knob, when an emergency stop is needed, staff can easily select the nearest broadcast telephone switch at the head or tail of the conveyor to the emergency stop interlock position, achieving timely stopping. This significantly reduces reaction time, increases safety, reduces damage to electromechanical equipment caused by delayed stopping, and avoids tail-end blockage due to delayed stopping, making a significant contribution to safe production. The emergency stop alarm device for scraper conveyors of this utility model has been successfully applied in working faces such as 1222(1), 1315(1), and 1511(1), eliminating equipment damage and personal injury to workers caused by untimely stopping. It generates nearly 2 million yuan in safety and economic benefits annually, with significant economic and social benefits, and has been unanimously praised by construction units.

[0024] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An emergency stop alarm device for a scraper conveyor, characterized in that: The device includes a first broadcast telephone, a second broadcast telephone, a DC relay ZJ, a magnetic start switch, and an alarm box. The magnetic start switch includes a contactor KM, a relay KA1, a relay KA2, and a start button QA. The emergency stop buttons S1 and S2 on the first and second broadcast telephones, and the coils of the DC relay ZJ are connected in series to the two ends of a first DC power supply. One end of the coil of relay KA2 is connected to one end of a second DC power supply, and the other end of the coil of relay KA2 is connected to one end of the start button QA and one end of the normally open contact KM1 of contactor KM. The other end of the start button QA is connected to the other end of the normally open contact KM1 of contactor KM and then to one end of the normally open contact ZJ2 of DC relay ZJ. The other end of the normally open contact ZJ2 of electrical relay ZJ is connected to the other end of the second DC power supply. One end of the coil of relay KA1 is connected to one end of the normally open contact KA1-1 of relay KA1 and connected to one end of the third DC power supply. The other end of the coil of relay KA1 is connected to one end of the normally open contact KA2-1 of relay KA2. The other end of the normally open contact KA1-1 of relay KA1 is connected to one end of the coil of contactor KM. The other end of the coil of contactor KM is connected to the other end of the normally open contact KA2-1 of relay KA2 and connected to the other end of the third DC power supply. The normally closed contact ZJ1 of DC relay ZJ is connected in series with the alarm box and then connected to the two ends of the fourth DC power supply. The scraper conveyor is connected in series with another normally open contact of contactor KM.

2. The scraper conveyor emergency stop alarm device according to claim 1, characterized in that: The first broadcast telephone is located at the head of the scraper conveyor, and the second broadcast telephone is located at the tail of the scraper conveyor.

3. The scraper conveyor emergency stop alarm device according to claim 1, characterized in that: The device also includes a stop button TA, and the other end of the normally open contact ZJ2 of the DC relay ZJ is connected in series with the stop button TA and then connected to one end of the second DC power supply.

4. The scraper conveyor emergency stop alarm device according to claim 1, characterized in that: The first DC power supply is 12V, the second DC power supply is 24V, the third DC power supply is 36V, and the fourth DC power supply is 127V.

5. The scraper conveyor emergency stop alarm device according to claim 1, characterized in that: The model of the broadcast telephone is KTK118.

6. The scraper conveyor emergency stop alarm device according to claim 1, characterized in that: The magnetic starter switch is model QJZ6-200.

7. The scraper conveyor emergency stop alarm device according to claim 1, characterized in that: The alarm box is an audible and visual alarm box, model KXB127.

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