Explosion-proof double-door control device

Abstract

The utility model discloses an explosion-proof double-door control device, which is characterized in that any side door is provided with a double-leaf opening and closing door and comprises a magnetic lock, an intermediate relay, a proximity switch and a button switch, each door leaf is provided with the proximity switch and the magnetic lock, each proximity switch is connected with a winding of the intermediate relay in series to form a loop, and the button switch is connected with the magnetic lock. The proximity switch is a control switch of the intermediate relay; the button switch is connected in parallel with each intermediate relay contact switch and then is connected in series with the magnetic lock to form a loop. According to the utility model, four doors can be flexibly locked and opened, and the double side doors cannot be opened at the same time.

Description

Technical Field

[0001] The utility model relates to an access controller, in particular to an explosion-proof double-door control device. Background Art

[0002] The current dual-access isolation explosion-proof doors on the market use a single leaf, which limits the isolation space and easily causes congestion during evacuation. To expand the space and speed up evacuation, dual-access isolation explosion-proof doors with two leaves have been proposed. However, existing dual-leaf, dual-access explosion-proof doors use microcontrollers for control, which is not very reliable in explosion-proof environments. If traditional circuit control is considered, there are challenges in flexibly locking and opening all four doors and preventing both side doors from opening simultaneously. Summary of the Invention

[0003] Purpose of the invention: In view of the above problems, the utility model proposes an explosion-proof double-door control device, which can flexibly realize the locking and opening of four doors, and the double side doors cannot be opened at the same time.

[0004] Technical solution: The technical solution adopted by the utility model is an explosion-proof double-door control device. One side door is set as a double-leaf switch door, including a magnetic lock, an intermediate relay, a proximity switch and a push button switch. Each door is provided with a proximity switch and a magnetic lock. Each proximity switch is connected in series with an intermediate relay winding to form a loop. The proximity switch is the control switch of the intermediate relay; the push button switch is connected in parallel with each intermediate relay contact switch and then in series with the magnetic lock to form a loop.

[0005] In one circuit connection topology, each intermediate relay contact switch is in a normally open state, and each button switch is in a normally closed state.

[0006] Each side door is equipped with a push button switch for unlocking and opening the door.

[0007] Each door is provided with an indicator light to indicate the open or closed status of each door.

[0008] The device also includes a self-locking emergency stop button, which is arranged in the intermediate relay circuit and is used to exit the self-locking state and open the doors on both sides at the same time.

[0009] The busbar is also connected in series with a fuse for circuit protection.

[0010] Beneficial effects: Compared with the existing technology, the utility model has the following advantages: 1. No microcontroller is required, the anti-electromagnetic interference capability is strong, and the control is more reliable in explosion-proof environments. 2. The explosion-proof door automatically locks when it is closed. 3. After the double-side doors are closed, only one side of the door can be opened, and the double-side doors cannot be opened at the same time. 4. In special circumstances, the double-side doors can be opened at the same time through the emergency stop button. The explosion-proof door of the utility model can provide the necessary airtight isolation function to prevent direct convection between the isolated space and the outside air, so as to reduce the pollution of the isolated and protected space by the outside world. At the same time, it can increase the evacuation speed and prevent people from being intercepted and trapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a circuit diagram of the explosion-proof double-door control device of the present invention. DETAILED DESCRIPTION

[0012] The technical solution of the present utility model will be further described below with reference to the accompanying drawings and embodiments.

[0013] The explosion-proof double-door control device described in this utility model is designed as a double-leaf switchable door on each side and includes a magnetic lock, an intermediate relay, a proximity switch, and a push button switch. Each door is equipped with a proximity switch and a magnetic lock. Each proximity switch is connected in series with an intermediate relay winding to form a circuit. The proximity switch serves as the control switch for the intermediate relay. The push button switch is connected in parallel with each intermediate relay contact switch and then in series with the magnetic lock to form a circuit.

[0014] Each side door is equipped with a push button switch for unlocking and opening the door.

[0015] Each door is provided with an indicator light to indicate the open or closed status of each door.

[0016] The device also includes a self-locking emergency stop button, which is arranged in the intermediate relay circuit and is used to exit the self-locking state and open the doors on both sides at the same time.

[0017] The busbar is connected in series with a fuse for circuit protection.

[0018] The circuit diagram is as follows Figure 1 As shown, the dotted line in the figure represents the interlocking state. In this figure, each intermediate relay contact switch is in the normally open state, and each button switch is in the normally closed state.

[0019] Working process description of explosion-proof double door control device:

[0020] (1) Doors 1 and 2 are both in the open position. The SB4 / SB5 / SB6 / SB7 proximity switches are on, and the KA1 / KA2 / KA3 / KA4 intermediate relays are energized. The HR1 / HR2 indicator lights are on, and the HL1 / HL2 indicator lights are off. The YA1 / YA3 magnetic locks are energized. Because the KA1 / KA3 intermediate relays are open, the YA2 / YA4 magnetic locks are de-energized.

[0021] (2) Doors 1 and 2 are both in the closed position. The proximity switches SB4 / SB5 / SB6 / SB7 are disconnected, and the intermediate relays KA1 / KA2 / KA3 / KA4 lose power. At this point, the intermediate relays KA1 / KA3 are energized by the pushbuttons SB0 / SB1 / SB2 / SB3, and the magnetic strips are energized, locking the doors.

[0022] (3) Open Door 1. Pressing the SB2 button de-energizes the YA1 / YA2 magnetic locks, releasing the door and causing it to move. The SB4 / SB5 proximity switches close, energizing the KA1 / KA2 intermediate relays. The normally open contacts of the KA1 / KA2 intermediate relays close. At this point, pressing the SB3 button will not de-energize the YA3 / YA4 magnetic locks and open Door 2.

[0023] (4) Close door 1. Because the normally closed point of the KA1 intermediate relay is disconnected when it is energized, the right door cannot be closed. Only by closing the left door first, the SB4 proximity switch is disconnected, KA1 is de-energized, and the KA1 intermediate relay is normally closed, and the right door can be locked by connecting the YA2 magnetic lock.

[0024] (5) Open Door 2. Door 1 is fully closed, the SB4 / SB5 buttons are disconnected, the KA1 / KA2 intermediate relay loses power, and the KA1 / KA2 normally closed electrical disconnect interlock becomes invalid. Press the door opening button SB3 to de-energize the YA3 / YA4 magnetic lock and open the door. The SB6 / SB7 buttons are turned on, energizing the KA3 / KA4 intermediate relay. Similarly, if Door 2 is not closed, pressing the SB2 button will not open Door 1.

[0025] (6) Press the SB2 / SB3 buttons to open the doors at the same time. Both doors cannot be opened due to interlocking.

[0026] (7) If the SB0 or ​​SB1 self-locking emergency stop button is pressed, the YA1 / YA2 / YA3 / YA4 magnetic locks are powered off and doors 1 and 2 are opened simultaneously.

Claims

1. An explosion-proof double-door control device, in which each side door is configured as a double-leaf switch door, characterized in that: It includes a magnetic lock, an intermediate relay, a proximity switch and a push button switch. Each door is equipped with a proximity switch and a magnetic lock. Each proximity switch is connected in series with an intermediate relay winding to form a circuit. The proximity switch is the control switch of the intermediate relay; the push button switch is connected in parallel with each intermediate relay contact switch and then in series with the magnetic lock to form a circuit.

2. The explosion-proof double-door control device according to claim 1, characterized in that: Each intermediate relay contact switch is in the normally open state, and each button switch is in the normally closed state.

3. The explosion-proof double-door control device according to claim 1, characterized in that: Each side door is equipped with a push button switch for unlocking and opening the door.

4. The explosion-proof double-door control device according to claim 1, characterized in that: Each door is provided with an indicator light to indicate the open or closed status of each door.

5. The explosion-proof double-door control device according to claim 1, characterized in that: The device also includes a self-locking emergency stop button, which is arranged in the intermediate relay circuit and is used to exit the self-locking state and open the doors on both sides at the same time.

6. The explosion-proof double-door control device according to claim 1, characterized in that: The busbar is connected in series with a fuse for circuit protection.

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