High-speed release valve structure for anti-explosion powder

Abstract

The invention discloses a high-speed relief valve structure for explosion suppression powder and belongs to the technical field of coal mine safety facilities. The high-speed relief valve structure for the explosion suppression powder comprises a valve body, a valve deck, a valve, a valve opening and closing mechanism and a detonating fuse and is characterized in that a valve bonnet carrier seat is formed on the side, facing a valve deck cavity, of the valve deck, and a set of spraying nozzle connecting holes are formed in the bottom wall of the valve deck; a diversion cavity is formed on the side, back on to the valve deck cavity, of the valve, a valve bonnet is formed in the center of the valve, a fragile connecting wall of the valve bonnet is provided with a fragile connecting wall easily cracking groove, and a top plate jacking flange is arranged on the bottom wall of the diversion cavity; the valve opening and closing mechanism is arranged in a valve body cavity at the position corresponding to the position above the valve and comprises a supporting disc, a valve bonnet pressing disc and a detonating fuse limiting cap. The high-speed relief valve structure for the explosion suppression powder has the advantages that the detonating fuse is arranged inside and capable of rapidly opening the valve; the resistance of leading the explosion suppression powder into the spraying nozzle connecting holes from the valve body cavity is reduced; the structure is simplified, the action stroke of the valve is obviously reduced; movement stability and reliability of the valve opening and closing mechanism are guaranteed; it is guaranteed that the explosion suppression function is completely played under emergent circumstances.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety facilities, in particular to a high-speed release valve structure for explosion-suppressing powder, which is installed on an explosion-suppressing powder storage tank filled with explosion-suppressing powder and plays the role of closing or opening the explosion-suppressing powder storage tank. Background technique [0002] The aforementioned explosion suppression powder is what the industry is used to call "dry powder fire extinguishing agent or powder fire extinguishing agent", which is usually composed of fire extinguishing substrates (such as baking soda, ammonium carbonate, ammonium salt of phosphoric acid, etc.) and an appropriate amount of lubricant (such as stearic acid). Magnesium, mica powder, talc powder, etc.) and a small amount of moisture-proofing agent (such as silica gel) are mixed and ground into fine particles, and carbon dioxide is used as the jet power. Because dry pow...

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Problems solved by technology

[0008] Furthermore, as the "dry powder fire extinguishing agent release valve structure for the dry powder fire extinguishing agent storage tank of the explosion suppression device" introduced by the invention patent authorization announcement number CN103252038B proposed by the applicant, the technical scheme and technical effect of this patent can be found in the specification No. 0008 to 0018 section, but there are still the following shortcomings: First, because the setting method of the detonator is external, that is to say, the position of the detonator corresponds to the valve cover cavity of the valve cover, not to the valve body cavity of the valve body. , so that not only the action stroke of opening the valve is large, which affects the opening speed, but also the volume of the entire relief valve in the height direction is large; secondly, since the explosion-suppressing powder outlet (the patent is called the powder spraying joint hole) is opened on the valve body , and because the valve is fixed in the valve body cavity of the valve body in a threaded manner at the position corresponding to the outlet of the explosion-suppressing powder, on the one hand, there is a loss of safety, because once the injection port matched with the outlet of the explosion-suppressing powder If there is even a slight source of leakage in the pipe joint, the injection pressure in the valve body cavity will gradually decrease. There is an inflection point that leads to increased resistance. On the one hand, it is more difficult to process and assemble the valve body; third, the overall structure is relatively complicated. For example, the valve opening mechanism recommended by the patent consists of a piston disc, a piston disc guide piece, and a buffer ring fixing seat. , buffer ring, pull rod and detonating tube pressure cap (see paragraph 0030 of the patent specification for details), so there are many parts in the process of opening the valve. On the one hand, it affects the opening speed, and on the other hand, it affects the valve opening mechanism. Action stability and reliability; Fourth, due to the lack of measures to sense the pressure in the valve body cavity, it is not enough for the relevant personnel in charge of coal mine safety to dynamically grasp whether the explosion suppression device is in a reliable state for emergency use by means of maintenance information, because once the injection pressure of the explosion-suppressing powder in the valve body cavity of the release valve connected to the explosion-suppressing powder storage tank, that is, the injection pressure of the explosion-suppressing powder storage tank decreases over time, there is no doubt that the backup will be buried Unused, useless and futile safety hazards

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