Warning device of small excavator

Abstract

The utility model provides a warning device for a small excavator, which belongs to the field of coal mining engineering and comprises a stay wire emergency stop switch, a relay KA and a plurality of warning ropes, the stay wire emergency stop switch is connected with the warning ropes to form a warning area, and a normally closed node S1 of the small excavator, a normally closed contact S2 of the stay wire emergency stop switch and a coil of the relay KA are connected in series and then connected with a power supply. A normally open contact KA1 of the relay KA is connected with a power supply after being connected in series with a coil of the contactor KM, and a normally open contact KM1 of the contactor KM is connected with a working power supply after being connected in series with the small excavator M1; and safety accidents of people entering the warning area by mistake are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal mining engineering technical field especially relates to a small excavator warning device. BACKGROUND

[0002] The electric small excavator is one of the commonly used tools in the coal mine, when the electric small excavator is operated, the driver's line of sight cannot cover the surroundings of the excavator, especially the rear and side of the small excavator have obvious visual blind area, if other personnel mistakenly enter the blind area, it is easy to cause safety accidents. UTILITY MODEL CONTENTS

[0003] The utility model is used to solve the problem that personnel mistakenly enter the blind area when the electric small excavator is operated and cause safety accidents.

[0004] The utility model solves the above technical problem through the following technical scheme: a small excavator warning device, the device includes pull line emergency stop switch, relay KA, a plurality of warning ropes, pull line emergency stop switch is connected with warning rope and is enclosed into warning area, the normally closed node S1 of small excavator, the normally closed contact S2 of pull line emergency stop switch, the coil of relay KA is connected after series connection and is connected with power supply, the normally open contact KA1 of relay KA and the coil of contactor KM are connected after series connection and are connected with power supply, the normally open contact KM1 of contactor KM and small excavator M1 are connected after series connection and are connected with working power supply.

[0005] The utility model is through pull line emergency stop switch and warning rope are connected and are enclosed into warning area, when excavator is operated, if someone mistakenly enters the warning area, will touch warning rope, lead to pull line emergency stop switch work, the normally closed contact S2 of pull line emergency stop switch will be disconnected, and the coil of relay KA that is connected with normally closed contact S2 loses electricity, the normally open contact KA1 of relay KA is disconnected, thereby make the coil of contactor KM that is connected with normally open contact KA1 loses electricity, the normally open contact KM1 of contactor KM is disconnected, and small excavator M stops working, avoid the personnel who mistakenly enter the warning area to have safety accidents.

[0006] Preferably, the small excavator is located in the warning area.

[0007] Preferably, the device further comprises a first pulley and a second pulley, one end of the pull line emergency stop switch is connected with the warning rope and then fixed to the roadway side after passing through the first pulley, the other end of the pull line emergency stop switch is connected with the other warning rope and then fixed to the roadway side after passing through the second pulley.

[0008] Preferably, one end of the pull line emergency stop switch is connected with one end of the warning rope, the other end of the warning rope is fixed to the roadway side after passing through the first pulley, the other end of the pull line emergency stop switch is connected with one end of the other warning rope, the other end of the other warning rope is fixed to the roadway side after passing through the second pulley.

[0009] Preferably, the pull cable emergency stop switch is fixed on the connecting rod of the belt conveyor.

[0010] Preferably, the pull cable emergency stop switch is a mine intrinsic safety intelligent emergency stop switch.

[0011] Preferably, the model of the pull cable emergency stop switch is KHJ12 / 0.5.

[0012] Preferably, the first pulley and the second pulley are both hoisting pulleys.

[0013] Preferably, the warning rope is a nylon rope.

[0014] Preferably, the power supply is a 36V power supply.

[0015] The advantages of the utility model lie in:

[0016] (1) the utility model discloses a pull cable emergency stop switch and warning rope are connected to form a warning area, when the excavator is working, if someone enters the warning area by mistake, will touch the warning rope, and the pull cable emergency stop switch works, the normally closed contact S2 of the pull cable emergency stop switch is disconnected, the coil of the relay KA connected with the normally closed contact S2 loses power, the normally open contact KA1 of the relay KA is disconnected, thereby making the coil of the contactor KM connected with the normally open contact KA1 lose power, the normally open contact KM1 of the contactor KM is disconnected, and the small excavator M stops working, avoiding the safety accident of the personnel entering the warning area by mistake.

[0017] (2) the small excavator warning device of the utility model has been successfully applied to Xieqiao Coal Mine 11618 working face, and only needs to invest a small amount of line, two pulleys, a mine intrinsic safety intelligent emergency stop switch and a small amount of nylon rope, and the device is simple to install, and the total investment is less than 300 yuan, and the investment cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The circuit diagram of the small excavator warning device is provided for the utility model embodiment.

[0019] Figure 2 Another circuit diagram of the small excavator warning device is provided for the utility model embodiment.

[0020] Figure 3 Another circuit diagram of the small excavator warning device is provided for the utility model embodiment.

[0021] Figure 4 The field layout schematic diagram of the small excavator warning device is provided for the utility model embodiment.

[0022] In the drawing: 10 is a belt conveyor, 20 is a roadway side, 30 is a pull cable emergency stop switch, 40 is a small excavator, 50 is a first pulley, 60 is a second pulley, and 100 is a warning area. Detailed Implementation

[0023] 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.

[0024] like Figure 1 As shown, this embodiment provides a warning device for a mini excavator, including a cable-operated emergency stop switch 30, a relay KA, a first pulley 50, and a second pulley 60. The cable-operated emergency stop switch 30 is fixed to the connecting rod of the belt conveyor 10. One end of the cable-operated emergency stop switch 30 is connected to one end of a warning rope, and the other end of the warning rope passes through the first pulley 50 and is fixed to the sidewall 20 of the tunnel. The other end of the cable-operated emergency stop switch 30 is connected to one end of another warning rope, and the other end of the warning rope passes through the second pulley 60 and is fixed to the sidewall 20 of the tunnel. 40 is located within the warning area 100 enclosed by two warning ropes and the side of the tunnel 20. This warning area 100 is equivalent to the working area of ​​the mini excavator. On site, an emergency stop interlock is led out from the body of the mini excavator, and a normally closed node S1 is connected in series with the normally closed node S1, the normally closed contact S2 of the pull-wire emergency stop switch, and the coil of the relay KA to the power supply. The normally open contact KA1 of the relay KA is connected in series with the coil of the contactor KM and the fuse FU to the power supply. The normally open contact KM1 of the contactor KM is connected in series with the mini excavator M1 to the working power supply.

[0025] The pull-wire emergency stop switch 30 is an intrinsically safe intelligent emergency stop switch for mining, model KHJ12 / 0.5. Table 1 shows the main technical parameters of the KHJ12 / 0.5 pull-wire emergency stop switch 30. Both the first pulley 50 and the second pulley 60 are 0.5t lifting pulleys, and the warning rope is a 6cm diameter nylon rope.

[0026] Table 1 Main Technical Parameters of KHJ12 / 0.5 Pull-Wire Emergency Stop Switch

[0027]

[0028] Working principle: the rear, side of the small excavator often exists obvious visual blind area in actual work, and the driver's visual line cannot cover the visual blind area, therefore, the utility model considers that the visual blind area of the small excavator is set as a warning area, when the excavator works, once the personnel enter the warning area, the excavator stops working, thereby avoiding safety accidents, and it is not necessary to rely on the safety reminding of the warning personnel in the working site, because the warning personnel in the working site often need to untangle the cable of the excavator, and it is easy to ignore the safety reminding of the personnel who mistakenly enter the warning area.

[0029] The pull cable emergency stop switch is fixed on the connecting rod of the belt conveyor, one end of the pull cable emergency stop switch is fixedly connected with one end of a nylon rope, the other end of the nylon rope is fixed on the side of the roadway after passing through a first pulley, the other end of the pull cable emergency stop switch is fixedly connected with one end of another nylon rope, and the other end of the nylon rope is fixed on the side of the roadway after passing through a second pulley, the small excavator is located in the warning area surrounded by the two warning ropes and the side of the roadway, a normally closed node S1 is led out from the body of the small excavator, the normally closed node S1, the normally closed contact S2 of the pull cable emergency stop switch and the coil of the relay KA are connected in series and then connected with a 36V power supply, the normally open contact KA1 of the relay KA and the coil of the contactor KM and the fuse FU are connected in series and then connected with the 36V power supply, when the small excavator normally works, if someone mistakenly enters the warning area, the nylon rope will be touched, the pull cable emergency stop switch works, the normally closed contact S2 of the pull cable emergency stop switch is disconnected, the coil of the relay KA connected with the normally closed contact S2 loses power, the normally open contact KA1 of the relay KA is disconnected, the coil of the contactor KM connected with the normally open contact KA1 loses power, the normally open contact KM1 of the contactor KM is disconnected, and the small excavator M stops working, so that safety accidents of the personnel who mistakenly enter the warning area are avoided, and the safety of the personnel is ensured.

[0030] The small excavator warning device has been successfully applied, the device only needs to invest a small amount of lines, two pulleys, a mine intrinsic safety type intelligent emergency stop switch and a small amount of nylon ropes, the device is simple to install, and the overall investment is less than 300 yuan, and the investment cost is low.

[0031] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been explained in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced equivalently; and the modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A mini-excavator alerting device characterized by: The device comprises a pull-cable emergency stop switch (30), a relay KA, a plurality of warning ropes, the pull-cable emergency stop switch (30) is connected with the warning ropes to form a warning area, a small excavator normally closed node S1, a normally closed contact S2 of the pull-cable emergency stop switch, a coil of the relay KA connected in series and connected with a power supply, a normally open contact KA1 of the relay KA connected in series with a coil of a contactor KM and connected with the power supply, and a normally open contact KM1 of the contactor KM connected in series with a small excavator M1 and connected with a working power supply.

2. The compact excavator alert device of claim 1, wherein: The small excavator is located in the warning area.

3. The compact excavator alert device of claim 1, wherein: The device further comprises a first pulley (50) and a second pulley (60), one end of the pull-cable emergency stop switch (30) is connected with a warning rope and then fixed on a roadway side through the first pulley (50), and the other end of the pull-cable emergency stop switch (30) is connected with another warning rope and then fixed on the roadway side through the second pulley (60).

4. The compact excavator alert device of claim 3, wherein: One end of the pull-cable emergency stop switch (30) is connected with one end of a warning rope, the other end of the warning rope is fixed on a roadway side through a first pulley (50), one end of the pull-cable emergency stop switch (30) is connected with one end of another warning rope, and the other end of the other warning rope is fixed on the roadway side through a second pulley (60).

5. The compact excavator alert device of claim 1, wherein: The pull-cable emergency stop switch (30) is fixed on a connecting rod of a belt conveyor.

6. The compact excavator alert device of claim 1, wherein: The pull-cable emergency stop switch (30) is a mine-used intrinsically safe intelligent emergency stop switch.

7. The compact excavator alert device of claim 6, wherein: The model of the pull-cable emergency stop switch (30) is KHJ12 / 0.

5.

8. The skid-steer loader alert device of claim 3, wherein: The first pulley (50) and the second pulley (60) are both hoisting pulleys.

9. The skid-steer loader alert device of claim 1, wherein: The warning rope is a nylon rope.

10. The skid-steer loader alert device of claim 1, wherein: The power supply is a 36V power supply.

Images