Công tắc dừng khẩn cấp hai chiều loại KHJ0.5 / 24 an toàn, Công tắc dừng khẩn cấp chống nổ KHJ0.5 / 12

2. Structural characteristics

     The shell is formed by casting, which is small in size and light in weight. The operation lever is flexible and reliable. Metal parts are treated with anti-rust and anti-corrosion treatment, and fasteners have measures to prevent automatic loosening.     

     3. Technical parameters

     1. Action stroke: 15mm Tolerance: ±3mm

     2. Action force: 50~100N

     3. Reset force: 40~80N

     4. Contact resistance: The contact resistance of the closed contact is not greater than 0.1Ω.

     5. Action performance: The switch acts and locks immediately after being acted by the action force, and can only be unlocked after manual reset.

     6. Contact capacity: DC12V/0.5A

     7. Dimensions: 156mm×91mm×181mm

     8. Weight: 2kg

1. Purpose and scope of application:

khj0.5/12 mine intrinsically safe emergency stop switch (hereinafter referred to as emergency stop switch) is suitable for underground coal mines containing explosive gas (ch4) environment and open-pit coal mines, coal preparation plants and other workplaces, as a mining belt conveyor It is used to detect the emergency stop signal of the integrated protection and control device of the machine.

2. Main technical features:

1. Explosion-proof type: mine intrinsically safe type, explosion-proof mark: exibi;

2. Model meaning:

k ----- switch

h ----- Intrinsically safe

j ----- emergency stop

0.5/12- Contact capacity

3. Executive standards: mt/t 647-1997, q/hwt92-2007;

4. Contact capacity 12v/0.5a;

5. Contact resistance ≤ 0.1ω, after vibration and impact ≤ 0.2ω;

6. Action performance: When a force of 40n～200n is applied outward on the pull ring on either side of the emergency stop switch, the contact state in the emergency stop switch should be reversed and self-locked; apply 40n outward on the corresponding reset pull ring When the force of ~200n is applied, the contact state in the emergency stop switch should be restored.

7. Dimensions: 380mm×170mm×72mm;

8. Mass: 3kg.

3. Environmental conditions:

(1) Normal working conditions:

1. The ambient temperature is -5℃～+40℃;

2. The altitude does not exceed 2000m (air pressure 86kpa ~ 110kpa);

3. The relative humidity of the surrounding air is less than or equal to 98%rh (25℃);

4. In mines containing explosive gases such as methane;

5. There is no significant shaking and shock vibration;

6. In an environment without gas or vapor that destroys insulation;

7. A place that can prevent dripping water.

(2) Bad storage and transportation conditions:

1. High temperature: 60℃;

2. Low temperature: -40℃;

3. Average relative humidity: 95% (25℃).

Fourth, the structure overview:

Emergency stop switch consists of shell, travel switch, emergency stop pull ring, reset pull ring, wiring terminal and other parts.

5. Working principle:

When a force of 40n～200n is applied to the emergency stop pull ring on either side of the emergency stop switch and a displacement occurs, the travel switch in the emergency stop switch acts, the contact state is reversed, and self-locking; When an external force of 40n～200n is applied, the limit switch in the emergency stop switch operates again, and the contact state is restored.