Electrical locking device of stop valve

Abstract

The utility model discloses an electrical locking device of a stop valve, and belongs to the technical field of safety protection of mine hoists. Comprising an electromagnetic lock, the electromagnetic lock is installed at a stop valve handle of a brake pump, the electromagnetic lock can operate a stop valve after being powered on and unlocked, and when a brake system of a mine works, normally-closed auxiliary contacts on contactors KM11.1 and KM11.2 of a main circuit of the brake pump are used for controlling on and off of the electromagnetic lock. Normally-closed auxiliary contacts on the brake pump main circuit contactors KM11.1 and KM11.2 are used for controlling on-off of the electromagnetic lock, so that when an oil inlet channel and an oil return channel share one pipeline when a hydraulic station is connected with a disc brake, failure of a brake system caused by closing a stop valve in the brake opening state of the brake system can be prevented.

Description

Technical Field

[0001] The utility model provides an electric locking device for a stop valve, belonging to the technical field of safety protection of mine hoists. Background Art

[0002] The stop valve is an indispensable component in industrial and daily fluid control systems and plays a key role. It is designed to achieve the opening and closing control of fluid media. Its working principle is based on the vertical movement of the valve disc. It adjusts the opening and closing of the flow channel through rotation operation to achieve precise management of the flow of liquid or gas. Its structure is simple and reliable, usually including a valve body, valve disc, valve stem, handwheel or drive mechanism (manual, electric, pneumatic, hydraulic), etc. It can withstand high pressure, high temperature, corrosion resistance, and adapt to various media.

[0003] At present, the hoist braking system of the mine's auxiliary shaft and main shaft uses a hydraulic station to drive two identical hoists. The two hoists serve as backup for each other and are connected to the main oil circuit through a stop valve. However, when the hydraulic station is connected to the disc brake, the oil inlet and return channels share a pipeline. If the stop valve is closed when the brake system is in the open state, this will cause the brake system to fail, resulting in a major hoisting accident. Utility Model Content

[0004] The technical problem to be solved by the utility model is that when the hydraulic station is currently connected to the disc brake, the oil inlet and oil return channels share a pipeline, and closing the stop valve when the brake system is in an open state will cause the brake system to fail.

[0005] In order to solve the above problems, the utility model proposes a technical solution: an electrical locking device for a stop valve, including an electromagnetic lock, which is installed at the stop valve handle of a brake pump. The electromagnetic lock can operate the stop valve after being energized or unlocked. When the brake system of the mine is working, the normally closed auxiliary contacts on the main circuit contactors KM11.1 and KM11.2 of the brake pump are used to control the on and off of the electromagnetic lock.

[0006] As an improvement, when the brake pump is running, one of the contactors KM11.1 and KM11.2 is energized, the normally closed point disconnects the intermediate relay KA1 and the power is cut off, the normally open point KA1-1 of KA1 is disconnected, and the electromagnetic lock is in the power-off locked state;

[0007] As an improvement, when the electromagnetic lock is in the power-off locked state, the KA1-2 normally closed point of KA1 is closed, and two red lights are on. At this time, the stop valve cannot be operated, which serves as a dual insurance of status display and mechanical locking;

[0008] As an improvement, when the brake pumps are all stopped, the main contactors KM11.1 and KM11.2 lose power, the normally closed points of contactors KM11.1 and KM11.2 are closed, the coil of intermediate relay KA1 is energized, the normally open point KA1-1 of KA1 is closed, the electromagnets A, B, C, and D are attracted, and the electromagnetic lock is energized and unlocked;

[0009] As an improvement, when the electromagnetic lock is in the energized unlocked state, the two green lights are on because the normally open point of KA1-1 is closed, and the two red lights are off because the normally closed point of KA1-2 is disconnected. At this time, the stop valve is allowed to be operated, which plays the role of status display and mechanical unlocking.

[0010] Beneficial effects of the utility model:

[0011] By setting up an electromagnetic lock and using the normally closed auxiliary contacts on the brake pump main circuit contactors KM11.1 and KM11.2 to control the on and off of the electromagnetic lock, when the hydraulic station is connected to the disc brake and the oil inlet and return channels share a pipeline, it can prevent the brake system from failing due to closing the stop valve when the brake system is in the open state. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is an electrical schematic diagram of an electrical locking device for a stop valve.

[0013] Figure 2 The utility model is a schematic diagram of a stop valve of a stop valve electrical locking device installed in a brake system oil circuit.

[0014] Figure 3 The utility model discloses a circuit diagram of a main electric control circuit of a hydraulic station of a stop valve electric locking device. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] according to Figure 1—3: The utility model provides a stop valve electrical locking device: including an electromagnetic lock, which is installed at the stop valve handle of the brake pump. The electromagnetic lock can be operated after being energized and unlocked. When the brake system of the mine is working, the normally closed auxiliary contacts on the brake pump main circuit contactors KM11.1 and KM11.2 are used to control the on and off of the electromagnetic lock. When the brake pump is running, one of the contactors KM11.1 and KM11.2 is energized, the normally closed point disconnects the intermediate relay KA1 and the KA1-1 normally open point is disconnected, and the electromagnetic lock is in the power-off locked state. When the electromagnetic lock is in the power-off locked state, the KA1-2 normally closed point of KA1 is closed, and two red lights are on. At this time, the stop valve cannot be operated, which serves as a dual insurance of status display and mechanical locking. When the brake pumps are all stopped, the contactor KM11. 1 and KM11.2 main contactors lose power, the normally closed points of contactors KM11.1 and KM11.2 are closed, the coil of intermediate relay KA1 is energized, the normally open point of KA1-1 of KA1 is closed, electromagnets A, B, C, and D are energized, and the electromagnetic lock is energized and unlocked. When the electromagnetic lock is energized and unlocked, two green lights are on due to the closure of the normally open point of KA1-1, and two red lights are off due to the disconnection of the normally closed point of KA1-2. At this time, the stop valve is allowed to be operated, which plays the role of status display and mechanical unlocking. By setting the electromagnetic lock, the normally closed auxiliary contacts on the brake pump main circuit contactors KM11.1 and KM11.2 are used to control the on and off of the electromagnetic lock, so that when the hydraulic station is connected to the disc brake, the oil inlet and oil return channels share a pipeline, which can prevent the brake system from failing due to closing the stop valve when the brake system is open.

[0017] The principle of the utility model: when in use, first install the electromagnetic lock at the stop valve handle. When the brake system is working, one of the oil pump motors is running. According to the working principle of the hydraulic station, when the brake pumps are all stopped, the system oil pressure must be zero. At this time, the brake system is in a brake state. At this time, the stop valve is operated with safety conditions. According to the logical relationship, the normally closed auxiliary contacts on the brake pump main circuit contactors KM11.1 and KM11.2 are used to control the on and off of the electromagnetic lock;

[0018] When the brake pump is running, one of the contactors KM11.1 and KM11.2 is energized, the normally closed point is disconnected, the intermediate relay KA1 is powered off, the normally open point KA1-1 of KA1 is disconnected, and the electromagnetic lock is in the power-off and locked state. At this time, the normally closed point KA1-2 of KA1 is closed, and two red lights are on. At this time, the stop valve cannot be operated, which serves as a dual insurance of status display and mechanical locking;

[0019] When the brake pumps stop, the main contactors KM11.1 and KM11.2 lose power, the normally closed points of contactors KM11.1 and KM11.2 close, the coil of intermediate relay KA1 is energized, the normally open point of KA1-1 of KA1 is closed, electromagnets A, B, C, and D are energized, and the electromagnetic lock is energized and unlocked. At this time, due to the closure of the normally open point of KA1-1, the two green lights are on, and the normally closed point of KA1-2 is disconnected and the two red lights are off. At this time, the stop valve is allowed to be operated, which serves the status display and mechanical unlocking functions.

[0020] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. An electrical locking device for a stop valve; characterized in that: It includes an electromagnetic lock, which is installed at the stop valve handle of the brake pump. The electromagnetic lock can operate the stop valve after being energized and unlocked. When the brake system of the mine is working, the normally closed auxiliary contacts on the brake pump main circuit contactors KM11.1 and KM11.2 are used to control the on and off of the electromagnetic lock. When the brake pump is running, one of the contactors KM11.1 and KM11.2 is energized, the normally closed point disconnects the intermediate relay KA1 and the power is cut off, the KA1-1 normally open point of KA1 is disconnected, and the electromagnetic lock is in a power-off and locked state. When the electromagnetic lock is in the power-off and locked state, the KA1-2 normally closed point of KA1 is closed, and two red lights are on. At this time, the stop valve cannot be operated, which serves as a double insurance of status display and mechanical locking. When the brake pumps are all stopped, the main contactors KM11.1 and KM11.2 lose power, the normally closed points of contactors KM11.1 and KM11.2 are closed, the coil of the intermediate relay KA1 is energized, the KA1-1 normally open point of KA1 is closed, the electromagnets A, B, C, and D are energized, and the electromagnetic lock is in the power-on and unlocked state.

2. The electric locking device for a stop valve according to claim 1, characterized in that: When the electromagnetic lock is in the energized unlocked state, the two green lights are on because the normally open point of KA1-1 is closed, and the two red lights are off because the normally closed point of KA1-2 is disconnected. At this time, the stop valve is allowed to be operated, which plays the role of status display and mechanical unlocking.

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