阅读说明：本技术 一种主动式双向隔爆快速插板阀及快速隔爆方法 (Active bidirectional explosion-proof quick gate valve and quick explosion-proof method ) 是由 钟圣俊 苗楠 蒋关宇 王健 王娜娜 吕超 钟明君 林卫波 于 2019-12-13 设计创作，主要内容包括：本发明涉及一种主动式双向隔爆快速插板阀及快速隔爆方法,插板阀包括阀体、可移动插板、压差传感器、气缸、气体发生器、压缩气瓶、控制器,阀体包括基准阀体和附加阀体,可移动插板与阀体内的轨道滑动连接；压差传感器安装在可移动插板两侧；气缸安装在附加阀体顶部,可移动插板与其活塞杆焊接；气体发生器与气缸无杆腔连通,压缩气瓶分别与气缸的无杆腔和有杆腔连通；气缸无杆腔和有杆腔分别连接有出气口电磁阀；气体发生器出口连接有快开阀,压差传感器、气体发生器、进气口电磁阀、快开阀与控制器电连接。本发明通过利用压差变化快速、主动闭合插板,通过可移动插板的重力及气缸内巨大压力双重限位锁定保证插板闭合状态,达到快速隔爆的目的。(The invention relates to an active bidirectional explosion-proof quick gate valve and a quick explosion-proof method, wherein the gate valve comprises a valve body, a movable gate, a differential pressure sensor, a cylinder, a gas generator, a compressed gas cylinder and a controller, wherein the valve body comprises a reference valve body and an additional valve body, and the movable gate is in sliding connection with a track in the valve body; the differential pressure sensors are arranged on two sides of the movable plugboard; the cylinder is arranged at the top of the additional valve body, and the movable inserting plate is welded with a piston rod of the movable inserting plate; the gas generator is communicated with a rodless cavity of the cylinder, and the compressed gas cylinder is respectively communicated with the rodless cavity and the rod cavity of the cylinder; the rodless cavity and the rod cavity of the cylinder are respectively connected with an air outlet electromagnetic valve; the outlet of the gas generator is connected with a quick-opening valve, and the differential pressure sensor, the gas generator, the gas inlet electromagnetic valve and the quick-opening valve are electrically connected with the controller. According to the invention, the flashboard is closed rapidly and actively by utilizing the pressure difference change, and the closed state of the flashboard is ensured by double limiting and locking of the gravity of the movable flashboard and the huge pressure in the cylinder, so that the purpose of rapid explosion suppression is achieved.)

1. An active bidirectional explosion-proof quick gate valve is characterized in that: the dust removal air pipe valve comprises a valve body, a movable plug board, a differential pressure sensor, an air cylinder, a gas generator, a compressed air cylinder and a controller, wherein the valve body comprises a reference valve body arranged on a dust removal air pipe and an additional valve body positioned on the upper part of the reference valve body; the movable inserting plate is connected with the track in a sliding manner; the differential pressure sensor is arranged on two sides of the movable inserting plate on the dust removing air pipe; the cylinder is arranged at the top of the additional valve body, and the movable inserting plate is welded with a piston rod of the cylinder; the gas generator is communicated with a rodless cavity of the cylinder through an air inlet electromagnetic valve by adopting a high-temperature and high-pressure resistant pipe fitting, and the compressed gas cylinder is respectively communicated with the rodless cavity and a rod cavity of the cylinder through the air inlet electromagnetic valve by adopting the high-temperature and high-pressure resistant pipe fitting; the differential pressure sensor, the gas generator and the gas inlet electromagnetic valve are electrically connected with the controller; the air cylinder rodless cavity and the rod cavity are respectively provided with an air outlet and are connected with an air outlet electromagnetic valve of the air cylinder rod cavity and an air outlet electromagnetic valve of the air cylinder rodless cavity; the high-temperature and high-pressure resistant pipe fitting at the outlet of the gas generator is connected with a quick-opening valve which is electrically connected with the controller.

2. An active bidirectional explosion-proof quick gate valve according to claim 1, characterized in that: and a sealing piece is arranged in the track of the valve body and is a sealing wool top.

3. An active bidirectional explosion-proof quick gate valve according to claim 1, characterized in that: the actual distance between the differential pressure sensor and the movable plug board is determined according to specific process parameters.

4. An active bidirectional explosion-proof quick gate valve according to claim 1, characterized in that: and the compressed gas in the compressed gas cylinder is inert gas.

5. The rapid explosion-proof method of the active bidirectional explosion-proof rapid gate valve of claim 1, characterized in that: the method comprises the following specific steps:

(1) arrangement of compressed gas

After the controller receives a signal that the value of the differential pressure sensor on any side is increased or exceeds a set threshold value at the highest speed, the controller sends an instruction to the gas generator, the quick-opening valve, the gas inlet electromagnetic valve and the gas outlet electromagnetic valve of the rod cavity of the cylinder are opened, compressed gas in the compressed gas cylinder rapidly enters the rod-free cavity of the cylinder, a detonating tube in an igniting assembly of the gas generator ignites explosive and gas generating agent to generate high-temperature high-pressure gas flow to be filled into the rod-free cavity of the cylinder, the compressed gas is heated and increased in pressure, and the piston rod in the cylinder is moved downwards by huge pressure, so that the movable inserting;

(2) without provision of compressed gas

After the controller receives a signal that the value of the differential pressure sensor on any side is increased extremely rapidly or exceeds a set threshold value, the controller sends an instruction to the gas generator, the quick opening valve and the gas inlet electromagnetic valve and the gas outlet electromagnetic valve of the rod cavity of the cylinder on the branch of the gas generator, the quick opening valve, the gas inlet electromagnetic valve and the gas outlet electromagnetic valve of the rod cavity are opened, the detonating tube in the igniting assembly of the gas generator ignites explosive and gas generating agent to generate high-temperature high-pressure gas flow to be filled into the cylinder, and the movable inserting plate is extruded downwards by huge pressure to be closed rapidly.

Technical Field

The invention belongs to the technical field of dust explosion-proof devices, and particularly relates to an active bidirectional explosion-proof quick gate valve and a quick explosion-proof method.

Background

In recent years, dust explosion events frequently occur, and great threats are caused to powder-related enterprises in various regions. When explosion happens, explosion pressure waves and flame can spread along the air pipe to cause secondary explosion, and if measures are not taken quickly in time, huge personnel and property losses can be brought. In order to reduce the harm of dust explosion as much as possible, explosion is usually blocked in a certain range by using an explosion-proof valve, but most of the explosion-proof valves in the market are one-way explosion-proof valves, only the explosion at the dust remover end can be blocked, and the explosion at the process end cannot play any role; at present, a floating ball type bidirectional explosion-proof valve also exists in the market, but the floating ball type bidirectional explosion-proof valve has a large influence on air flow in a pipeline, and provides higher requirements for the air quantity of a fan, so that unnecessary energy consumption is increased. Compare in mechanical flame proof flap valve and ball-cock assembly on the existing market, the pipeline one side pressure that explodes sharply risees, and at this moment the flap valve is closed and is turned over the board, the ball-cock assembly extrudees the floater to pipeline one side cross section, and such operation leads to explosion side pressure release back pressure to reduce the back and turns over the board and open (being inhaled and open), the floater resets very easily, but explosive environment still exists in the pipeline this moment, and the secondary that probably explodes spreads, brings bigger danger. In addition, the common explosion-proof valve is mechanical explosion-proof and belongs to passive explosion-proof, so that the active bidirectional explosion-proof valve can give effective response in a shorter time, and has important significance for improving the reliability of explosion isolation.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an active bidirectional explosion-proof quick gate valve and a quick explosion-proof method.

An active bidirectional explosion-proof quick gate valve comprises a valve body, a movable plug board, a differential pressure sensor, a cylinder, a gas generator, a compressed gas cylinder and a controller, wherein the valve body comprises a reference valve body arranged on a dust removal air pipe and an additional valve body positioned at the upper part of the reference valve body; the movable inserting plate is connected with the track in a sliding manner; the differential pressure sensor is arranged on two sides of the movable inserting plate on the dust removing air pipe; the cylinder is arranged at the top of the additional valve body, and the movable inserting plate is welded with a piston rod of the cylinder; the gas generator is communicated with a rodless cavity of the cylinder through an air inlet electromagnetic valve by adopting a high-temperature and high-pressure resistant pipe fitting, and the compressed gas cylinder is respectively communicated with the rodless cavity and a rod cavity of the cylinder through the air inlet electromagnetic valve by adopting the high-temperature and high-pressure resistant pipe fitting; the differential pressure sensor, the gas generator and the gas inlet electromagnetic valve are electrically connected with the controller; the air cylinder rodless cavity and the rod cavity are respectively provided with an air outlet and are connected with an air outlet electromagnetic valve of the air cylinder rod cavity and an air outlet electromagnetic valve of the air cylinder rodless cavity; the high-temperature and high-pressure resistant pipe fitting at the outlet of the gas generator is connected with a quick-opening valve which is electrically connected with the controller.

And a sealing piece is arranged in the track of the valve body and is a sealing wool top.

The actual distance between the differential pressure sensor and the movable plug board is determined according to specific process parameters.

And the compressed gas in the compressed gas cylinder is inert gas.

The quick explosion-proof method of the active bidirectional explosion-proof quick gate valve comprises the following specific steps:

(1) arrangement of compressed gas

After the controller receives a signal that the value of the differential pressure sensor on any side is increased or exceeds a set threshold value at the highest speed, the controller sends an instruction to the gas generator, the quick-opening valve, the gas inlet electromagnetic valve and the gas outlet electromagnetic valve of the rod cavity of the cylinder are opened, compressed gas in the compressed gas cylinder rapidly enters the rod-free cavity of the cylinder, a detonating tube in an igniting assembly of the gas generator ignites explosive and gas generating agent to generate high-temperature high-pressure gas flow to be filled into the rod-free cavity of the cylinder, the compressed gas is heated and increased in pressure, and the piston rod in the cylinder is moved downwards by huge pressure, so that the movable inserting;

(2) without provision of compressed gas

After the controller receives a signal that the value of the differential pressure sensor on any side is increased extremely rapidly or exceeds a set threshold value, the controller sends an instruction to the gas generator, the quick opening valve and the gas inlet electromagnetic valve and the gas outlet electromagnetic valve of the rod cavity of the cylinder on the branch of the gas generator, the quick opening valve, the gas inlet electromagnetic valve and the gas outlet electromagnetic valve of the rod cavity are opened, the detonating tube in the igniting assembly of the gas generator ignites explosive and gas generating agent to generate high-temperature high-pressure gas flow to be filled into the cylinder, and the movable inserting plate is extruded downwards by huge pressure to be closed rapidly.

The invention has the beneficial effects that: according to the invention, through the design of the gas generator, the compressed gas cylinder and the movable inserting plate, when any side of the inserting plate valve in the dust removing air pipe is exploded, the controller quickly responds to the explosion, controls the gas generator to instantly generate high-pressure gas, effectively blocks the explosion on any side of the inserting plate valve by combining the compressed gas, and reduces the influence range of the explosion, thereby achieving the purpose of quick explosion suppression; compared with the existing product, the invention has the following advantages: (1) the explosion suppression can be effectively and actively performed, and the dust removal air pipe can be blocked no matter which side is exploded, so that the purpose of bidirectional explosion suppression is achieved; (2) the device of the invention can be arranged on horizontal, vertical and inclined pipelines; (3) the device has the advantages of simple structure, quick response, quick action and quick explosion suppression.

Drawings

FIG. 1 is a schematic diagram illustrating a connection state of the present invention according to an embodiment of the present invention;

FIG. 2 is a schematic view showing the opening state of the gate valve according to the present invention;

FIG. 3 is a schematic view of the state of the gate valve in the opening process of the present invention;

FIG. 4 is a schematic view of the gate valve in the present invention in a closed state;

wherein the content of the first and second substances,

the gas generator comprises a controller 1, a gas generator 2, a compressed gas cylinder 3, a differential pressure sensor 4, a cylinder 5, an additional valve body 6, a reference valve body 7, a movable plug board 8, a quick-opening valve 9, a rodless cavity gas outlet electromagnetic valve 10, a rod cavity gas outlet electromagnetic valve 11 and a sealing box 12.

Detailed Description

For better understanding of the present invention, the technical solutions and effects of the present invention will be described in detail by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1, an active bidirectional explosion-proof fast gate valve comprises a valve body, a movable gate 8, a differential pressure sensor 4, a cylinder 5, a gas generator 2, a compressed gas cylinder 3 and a controller 1, wherein the valve body comprises a reference valve body 7 arranged on a dust removal air pipe and an additional valve body 6 positioned at the upper part of the reference valve body 7, the reference valve body 7 and the additional valve body are of an integrally formed structure, a concave track is arranged along a frame in the valve body, a sealing element is arranged in the track, and the sealing element is a sealing wool top; the movable inserting plate 8 is connected with the track in a sliding manner; the differential pressure sensor 4 is arranged on two sides of a movable inserting plate 8 on a dust removing air pipe, the pressure difference between the upstream and the downstream of the dust removing air pipe is monitored in real time, the actual distance between the differential pressure sensor 4 and the movable inserting plate 8 is determined according to specific process parameters, namely the total delay time (sum of mechanical delay and electrical delay) for closing the inserting plate and the air speed of an actual working condition, the mechanical delay and the electrical delay are measured, a plurality of connecting indicating lamps are required to be arranged on the dust removing air pipe, a controller 1 sends out an inserting plate valve closing instruction, and the delay is analyzed and calculated frame by high-speed photography video in the process from the instruction to the; in the embodiment, the wind speed in the dust removing air pipe is 20m/s, the total delay time of the gate valve is 50ms, so the actual distance between the differential pressure sensor 4 and the valve of the movable gate 8 is at least 20 x 0.05m, but the installation distance is considered to be 3 times or 5 times, namely 3m or 5m, considering the instantaneous speed of explosion propagation; when the dust safety monitoring device works normally, the test values of the differential pressure sensors 4 on the two sides belong to the normal condition within the threshold range of dust safety and no explosion; the cylinder 5 is arranged at the top of the additional valve body 6, and the movable inserting plate 8 is welded with a piston rod of the cylinder 5; the gas generator 2 is communicated with a rodless cavity of the cylinder 5 through an air inlet electromagnetic valve by adopting a high-temperature and high-pressure resistant pipe fitting, and the compressed gas cylinder 3 is respectively communicated with the rodless cavity and a rod cavity of the cylinder 5 through the air inlet electromagnetic valve by adopting the high-temperature and high-pressure resistant pipe fitting; the differential pressure sensor 4, the gas generator 2 and the gas inlet electromagnetic valve are electrically connected with the controller 1; the rodless cavity and the rod cavity of the air cylinder 5 are respectively provided with an air outlet and are connected with an air outlet electromagnetic valve 11 of the rod cavity of the air cylinder and an air outlet electromagnetic valve 10 of the rodless cavity of the air cylinder through high-temperature and high-pressure resistant pipe fittings; the high-temperature and high-pressure resistant pipe fitting at the outlet of the gas generator 2 is connected with a quick-opening valve 9, and the quick-opening valve 9 is electrically connected with the controller 1.

The compressed gas in the compressed gas cylinder 3 is inert gas, and the compressed gas in the embodiment is nitrogen; the controller 1 is electrically connected with the differential pressure sensor 4, the gas generator 2 and the electromagnetic valve, and the controller 1 can be an explosion-proof box body, a PLC, a DSP or an ARM controller.

The intake port solenoid valve in this embodiment is mounted on the surface of the cylinder 5 and covered with a seal case 12.

As shown in fig. 3-4, the quick explosion-proof method for the active bidirectional explosion-proof quick gate valve specifically includes the following steps:

(1) arrangement of compressed gas

After the controller 1 receives a signal that the value of the differential pressure sensor 4 on any side is increased at the highest speed or exceeds a set threshold value, the controller 1 sends an instruction to the gas generator 2, the quick opening valve 9, the gas inlet electromagnetic valve and the gas outlet electromagnetic valve 11 of the rod cavity of the cylinder are opened, compressed gas in the compressed gas cylinder 3 rapidly enters the rodless cavity of the cylinder 5, at the moment, a booster tube in an igniting assembly of the gas generator 2 ignites explosives and gas generating agents to generate high-temperature high-pressure gas flow to be filled in the rodless cavity of the cylinder 5, the compressed gas is heated and the pressure of the high-temperature high-pressure gas flow is increased, and the piston rod in the cylinder 5 moves downwards due to huge pressure;

(2) without provision of compressed gas

After the controller 1 receives a signal that the value of the differential pressure sensor 4 on any side is increased at the highest speed or exceeds a set threshold value, the controller 1 sends an instruction to the gas generator 2, the quick-opening valve 9 and the gas inlet electromagnetic valve on the branch of the gas generator, the rod cavity gas outlet electromagnetic valve 11 of the cylinder, the quick-opening valve 9, the gas inlet electromagnetic valve and the rod cavity gas outlet electromagnetic valve 11 of the cylinder are opened, a booster tube in an ignition assembly of the gas generator 2 ignites explosives and gas generating agents to generate high-temperature high-pressure gas flow to be filled into the cylinder 5, and the movable inserting plate 8 is extruded downwards by huge pressure to be closed quickly.

When the gate valve 8 is required to be opened as shown in fig. 2, the controller 1 sends an instruction to the air inlet electromagnetic valve on the connecting branch of the compressed air cylinder 3 and the air cylinder 5 and the air outlet electromagnetic valve 10 of the rodless cavity of the air cylinder, the air inlet electromagnetic valve is opened, the air in the compressed air cylinder 3 rushes into the rod cavity in the air cylinder 5 to drive the piston rod to move upwards, the movable gate 8 is brought into the additional valve body 6, and the movable gate moves upwards stably in the track in the process.