CN209818825U

CN209818825U - Deluge alarm valve

Info

Publication number: CN209818825U
Application number: CN201920148501.2U
Authority: CN
Inventors: 陈方明; 朱奇; 刘挺
Original assignee: Kuai Da Fire-Fighting Technology Co Ltd
Current assignee: Kuai Da Fire-Fighting Technology Co Ltd
Priority date: 2019-01-28
Filing date: 2019-01-28
Publication date: 2019-12-20
Anticipated expiration: 2029-01-28

Abstract

A deluge alarm valve, for the single piston lifting structure, the appearance is the hammer-like type, adopt the pressurization to drive the action mechanism that opens, reduces pressure/pressurizes and closes, it is the fire extinguishing field of fire control; the problems that the conventional deluge alarm valve is single in closing mode, does not have an inner cavity exhaust measure and is troublesome in heat preservation in winter are solved; the valve consists of a lower valve body, a middle valve body, a lining plate, an upper valve body, a sealing ring, an upper pressure plate, a lower pressure plate, a piston, a spring and a shaft lever; the sealing ring is clamped and fixed by the lower pressure plate and the upper pressure plate and is screwed on the upper side of the shaft lever, the spring is arranged between the middle valve body and the shaft lever, the piston is screwed at the lower end of the shaft lever, and the lining plate is plugged in the middle valve body; the spring top sealing ring component is sealed with the sealing surface of the valve body at ordinary times; when spraying: the fire-fighting water source enters the upper cavity of the piston and is discharged by opening; decompression/pressurization shut-off: the sealing ring component moves upwards to close the seal under the upward acting force of the piston; the valve has wide application prospect in metallurgy, refining area, tank area and power transmission and transformation.

Description

Deluge alarm valve

Technical Field

The utility model relates to a deluge alarm valve, the rated working pressure is 1.6MPa, the nominal diameter DN350mm, the appearance is hammer-imitating, it is a single piston lifting structure, it adopts the action mechanism of pressurization drive opening, decompression/pressurization closing; is a core control valve in a water spray fire extinguishing system, belonging to the field of fire fighting.

Background

The current national standard GB5135.3-2003 deluge alarm valve only has a single function of pressurization closing or decompression closing, and cannot meet the closing application of a storage tank with the height of tens of meters; the current deluge alarm valve does not have the function of valve cavity exhaust, and the fire-fighting pipe network shakes violently due to the oscillation of gas in the valve cavity in the opening and closing processes; in outdoor places in winter, a special insulation can for electric heating or steam heating is required to be arranged, and the existing deluge alarm valve cannot meet the use requirements of metallurgy, electric power, refining areas, tank areas and power transmission and transformation.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems of single closing mode, no inner cavity exhaust measure and troublesome heat preservation in winter of the deluge alarm valve, the utility model provides a deluge alarm valve which is a single-piston lifting structure and adopts the action mechanism of pressurization driving opening and decompression/pressurization closing; the valve consists of a lower valve body (1), a bolt (2), a middle valve body (3), a lining plate (4), an upper valve body (5), a sealing ring (6), an upper pressure plate (7), a filter screen plug screw (8), a filter screen (9), a lower pressure plate (10), a loop nut (11), a loop core (12), a fastening screw (13), an O-shaped ring (14), a sealing screw (15), a piston (16), a spring (17) and a shaft lever (18), and is provided with a pressurization driving port (a), a shaft lever damping port (b), a valve cavity exhaust port (c), a pressurization closing port (d) and a pressure taking port (e); the sealing ring is clamped and fixed by the lower pressure plate and the upper pressure plate and is screwed on the upper side of the shaft lever, the spring is arranged between the middle valve body and the shaft lever, the piston is screwed at the lower end of the shaft lever, and the lining plate is plugged in the middle valve body; the spring pushing seal ring assembly is in contact seal with the sealing surface of the valve body at ordinary times; the fire-fighting water source passes through the annular gaps between the upper valve body, the lower valve body and the middle valve body and reaches the sealing ring for sealing; when spraying: the fire-fighting water source enters the upper cavity of the piston and is discharged by opening; decompression/pressurization shut-off: the seal ring assembly moves upward to close the seal under the upward force of the piston.

The utility model discloses a realize like this: the valve comprises a lower valve body, a bolt, a middle valve body, a lining plate, an upper valve body, a sealing ring, an upper pressing plate, a filter screen plug screw, a filter screen, a lower pressing plate, a loop nut, a loop core, a fastening screw, an O-shaped ring, a sealing screw, a piston, a spring and a shaft rod, and is provided with a pressurization driving port, a shaft rod damping port, a valve cavity exhaust port, a pressurization closing port and a pressure taking port. The middle valve body is fastened in the upper valve body and the lower valve body by bolts, the sealing ring is clamped and fixed by the lower pressure plate and the upper pressure plate and is screwed on the upper side of the shaft lever, and the filter screen is embedded in the outlet counter bore of the shaft lever and is fastened by a filter screen plug screw; the spring is arranged between the middle valve body and the shaft lever; the lower end of the shaft lever is screwed with the piston and is arranged in a piston cavity of the middle valve body; the lining plate is plugged in the upper end of the middle valve body, and the movable core is fixed on the right side of the upper valve body by a movable sleeve nut; the spring pushing seal ring assembly is in contact seal with the sealing surface of the valve body at ordinary times; the fire-fighting water source passes through the annular gaps between the upper valve body, the lower valve body and the middle valve body and reaches the sealing ring assembly for sealing; when spraying: the fire-fighting water source enters the piston upper cavity from the pressurizing driving port to be pressurized, and the sealing ring component moves downwards under the action of the piston to open water; when closing: reducing pressure and closing: the water pressure of the upper piston cavity is released, and the sealing ring component moves upwards to close the seal under the combined action of the water pressure of the lower piston cavity and the thrust of the spring; pressure closing: the water pressure of the piston upper cavity is discharged, a fire-fighting water source is led to the piston lower cavity through the pressurizing closing port, and the sealing ring assembly moves upwards to close the sealing under the combined action of the upward acting force of the piston and the thrust of the spring.

The utility model has the advantages that: meanwhile, the pressure reducing/pressurizing closing function is achieved, the industrial blank is filled, and the application requirements of the high storage tank are met; gas in the inner cavity of the deluge alarm valve is discharged, vibration of a pipe network is reduced, and the processing and assembling difficulty of the large-diameter valve is reduced by adopting a plane sealing structure; the valve cavity is inflated and prevented from freezing in winter, extra heat preservation measures are not needed, and the use requirements of metallurgy, electric power, smelting areas, tank areas and power transmission and transformation are met.

The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a sectional view of the loose core of the present invention.

Fig. 3 is a cross-sectional view of the shaft rod of the present invention.

Detailed Description

The middle valve body is fastened in the upper valve body and the lower valve body by bolts, positioned by the outer circle of the middle valve body and sealed by O-shaped rings on the upper end surface and the lower end surface of the middle valve body; the sealing ring is clamped and fixed by the lower pressure plate and the upper pressure plate and is screwed on the upper side of the shaft lever, and the filter screen is embedded in the outlet counter bore of the shaft lever and is fastened by a filter screen plug screw; one end of the spring is plugged in the shaft lever hole, and the other end of the spring is arranged in the counter bore of the middle valve body; the lower end of the shaft lever is screwed with the piston and is arranged in a piston cavity of the middle valve body; the middle valve body is provided with a piston cavity, a lining plate assembly hole, a pressurizing driving port and a pressurizing closing port; the lining plate is plugged at the upper end of the middle valve body, is sealed by an O-shaped ring and is locked by a fastening screw, the movable core is fixed at the right side of the upper valve body by a movable sleeve nut, and the sealing screw is arranged at the right lower end of the middle valve body; the spring pushing seal ring assembly is in contact seal with the sealing surface of the valve body at ordinary times; the fire-fighting water source passes through the annular gaps between the upper valve body, the lower valve body and the middle valve body and reaches the sealing ring assembly for sealing, the loop nut is loosened to remove accumulated air in the valve cavity, and then the loop nut is screwed; when spraying: the fire-fighting water source enters the piston upper cavity from the pressurization driving port to be pressurized, the sealing ring component moves downwards under the action of the piston and opens water, and water flow in the piston lower cavity is discharged from the shaft lever damping port; when closing, reducing pressure and closing: the water pressure of the upper piston cavity is released, and the sealing ring component moves upwards to close the seal under the combined action of the water pressure of the lower piston cavity and the thrust of the spring; pressure closing: the water pressure of the upper piston cavity is discharged, a fire fighting water source is led to the lower piston cavity through the pressurizing closing port, and the sealing ring assembly moves upwards to close the sealing under the combined action of the upward acting force of the piston and the thrust of the spring, so that the decompression/pressurizing closing function is realized; the utility model provides a technical scheme that its technical problem adopted is: the structure of the loose nut and the loose core is designed, the left end of the loose core is hemispherical, the excircle of the middle section is a locking shaft shoulder, the middle section is provided with an O-shaped ring groove and a radial vent hole leftwards in sequence, the center is provided with an axial exhaust duct, the radial vent hole is communicated with the axial exhaust duct, and the right side is provided with M14 multiplied by 1.5 external straight threads; the loose nut is loosened, the accumulated air in the inner cavity of the valve body is discharged through the radial vent hole and the axial central exhaust duct of the loose core, and the air flow oscillation of the valve in the opening and closing processes is reduced; the valve cavity is inflated to prevent freezing in winter, the water level in the valve is pressed below a permafrost layer, and the deluge alarm valve does not need to be provided with a special insulation can for electric heating or steam heating, so that the field matching and maintenance management are simplified; the lower section hole of the shaft lever is a spring counter bore, the outer straight thread is processed on the excircle of the lower section of the shaft lever to assemble the piston, the middle upper section hole is a damping port with the diameter of phi 3mm, the upper section hole is a filter screen counter bore and a filter screen plug screw thread hole, the shaft shoulder and the outer straight thread are processed on the excircle of the upper section to assemble the lower pressure plate and the upper pressure plate, the filter screen prevents the damping port of the shaft lever from being blocked, impurities are prevented from entering the lower cavity of the piston, and the operation flexibility of the; when the sealing ring component is opened, water flow in the lower cavity of the piston is slowly discharged from the damping port of the shaft rod, and the sealing ring component slowly moves downwards, so that impact vibration of the water flow on a pipe network is reduced; when the pressure is reduced and closed, the upper piston cavity is rapidly decompressed through the pressurization driving port, the pressure of the lower piston cavity is not reduced, the upper piston cavity moves upwards and is closed under the combined action of the pressure of the lower piston cavity and the spring, and the piston moves upwards slowly due to the action of the shaft lever damping port, so that the closing water hammer effect is reduced; the pressure taking port (e) is arranged in an annular gap section between the middle valve body and the lower valve body, the overflowing section of the annular gap section shrinks, the water pressure is maximum, and the piston is driven conveniently; the utility model has the functions of pressure reduction and pressure closing, the pressure reduction closing operation is simple, the pressure closing belongs to forced closing, the application requirement of the deluge alarm valve for protecting the occasion with the height of tens of meters is met, and the valve can be reliably and rapidly kept pressed and closed on line even if the outlet has a static pressure water head with the height of tens of meters; and by adopting a plane sealing structure, the concentricity processing precision and the assembly difficulty of the sealing ring component are reduced.

The utility model discloses have extensive application prospect in metallurgy, electric power, refining district, jar district, power transmission and transformation.

1) The material is as follows: the movable core, the shaft lever and the piston are made of tin bronze alloy, the upper valve body, the middle valve body, the lower valve body, the spring, the bolt, the upper pressure plate, the lower pressure plate, the fastening screw, the sealing screw, the loop nut, the filter screen and the filter screen plug screw are made of stainless steel, the O-shaped ring is made of nitrile rubber, and the sealing ring is made of molded ethylene propylene diene monomer.

2) Rated working pressure: 1.6 MPa.

3) Working pressure range: 0.14MPa to 1.6 MPa.

4) Nominal diameter: DN 350.

5) Output flow rate: 26000L/min.

6) Sealing pressure: 3.2 MPa.

7) The starting mode is as follows: and (4) pressurizing and driving.

8) Starting time: less than or equal to 15 s.

9) The closing mode is as follows: the pressurization or depressurization is closed.

10) Closing time: less than or equal to 20 s.

11) The installation mode is as follows: the vertical and horizontal installation and use.

It will be appreciated by persons skilled in the art that the foregoing specific embodiments are provided merely for illustrative purposes and are not to be construed as limiting the scope of the invention, which is defined by the appended claims.

Claims

1. A deluge alarm valve, its characteristic is single piston lifting structure, the appearance is the imitation hammer type, adopt and pressurize the actuating mechanism that drives and opens, decompress/pressurize and close; the deluge alarm valve consists of: the valve comprises a lower valve body (1), a bolt (2), a middle valve body (3), a lining plate (4), an upper valve body (5), a sealing ring (6), an upper pressure plate (7), a filter screen plug screw (8), a filter screen (9), a lower pressure plate (10), a loop nut (11), a loop core (12), a fastening screw (13), an O-shaped ring (14), a sealing screw (15), a piston (16), a spring (17) and a shaft lever (18), wherein a pressurizing driving port (a), a shaft lever damping port (b), a valve cavity exhaust port (c), a pressurizing closing port (d) and a pressure taking port (e) are arranged; the middle valve body is fastened in the upper valve body and the lower valve body by bolts, the sealing ring is clamped and fixed by the lower pressure plate and the upper pressure plate and is screwed on the upper side of the shaft lever, the spring is arranged between the middle valve body and the shaft lever, the piston is screwed at the lower end of the shaft lever, and the lining plate is plugged in the middle valve body; the spring pushing seal ring assembly is in contact seal with the sealing surface of the valve body at ordinary times; the fire-fighting water source passes through the annular gaps between the upper valve body, the lower valve body and the middle valve body and reaches the sealing ring for sealing; when spraying: the fire-fighting water source enters the piston upper cavity from the pressurizing driving port to be pressurized, and the sealing ring component moves downwards under the action of the piston to open water; when closing: reducing pressure and closing: the water pressure of the upper piston cavity is released, and the sealing ring component moves upwards to close the seal under the combined action of the water pressure of the lower piston cavity and the thrust of the spring; pressure closing: the water pressure of the piston upper cavity is discharged, a fire-fighting water source is led to the piston lower cavity through the pressurizing closing port, and the sealing ring assembly moves upwards to close the sealing under the combined action of the upward acting force of the piston and the thrust of the spring.

2. A deluge alarm valve as claimed in claim 1, characterised in that: the left end of the movable core is hemispherical, the excircle of the middle section is a shaft shoulder, the middle section is provided with an O-shaped ring groove and a radial vent hole leftwards in sequence, the center is provided with an exhaust duct, the radial vent hole is communicated with the exhaust duct, and the right side is provided with M14 multiplied by 1.5 external straight threads.

3. A deluge alarm valve as claimed in claim 1, characterised in that: the lower section hole of the shaft lever is a counter bore, the excircle of the lower section is processed with straight threads, the upper section hole is a phi 3mm opening, the upper section hole is a counter bore and a threaded hole, and the excircle of the upper section is processed with a shaft shoulder and straight threads.