CN215371133U

CN215371133U - Overpressure backflow device of fire alarm valve

Info

Publication number: CN215371133U
Application number: CN202120391069.7U
Authority: CN
Inventors: 温明汉
Original assignee: Protector Sprinkler Ind Co ltd
Current assignee: Protector Sprinkler Ind Co ltd
Priority date: 2021-02-18
Filing date: 2021-02-22
Publication date: 2021-12-31
Anticipated expiration: 2031-02-22
Also published as: JP3232248U; TWM615049U

Abstract

The utility model provides an overpressure backflow device of a fire-fighting alarm valve, which is used for adjusting the hydraulic pressure in the fire-fighting alarm valve, wherein the fire-fighting alarm valve is internally provided with a main valve, a water inlet flow passage and a water outlet flow passage, the overpressure backflow device comprises a backflow seat arranged on the main valve, the backflow seat is internally provided with a backflow hole communicated with the water inlet flow passage and a containing hole communicated with the water outlet flow passage, a spring seat and a pressure regulating ring are arranged in the containing hole, the pressure regulating ring is provided with a liquid through hole, the spring seat is pressed and contacted with the pressure regulating ring through the driving of elastic thrust exerted by a spring so as to control the time when overpressure liquid in the water outlet flow passage flows back to the water inlet flow passage, and the problem that the traditional fire-fighting alarm valve delays to open because the hydraulic pressure in the water outlet flow passage is higher than the hydraulic pressure in the water inlet flow passage is solved.

Description

Overpressure backflow device of fire alarm valve

Technical Field

The utility model relates to a fire alarm valve, in particular to an overpressure backflow device of the fire alarm valve.

Background

The fire-fighting alarm valve is used for controlling the flow of liquid (fire-fighting water and foam water) in the fire-fighting liquid supply pipe, the fire-fighting liquid supply pipe is connected with the sprinkling head, when a fire disaster happens, the fire-fighting alarm valve is opened to continuously supply a large amount of liquid to the sprinkling head, and the sprinkling head sprinkles the liquid to a fire source, so that the temperature of the fire source can be reduced, the fire source can be isolated from oxygen, and the fire-fighting effect is further achieved.

Referring to fig. 1, it is shown that the valve body 10a of the fire alarm valve has a main valve 14a, a water inlet channel 11a and a water outlet channel 12a, the main valve 14a is used to control the liquid in the water inlet channel 11a to flow to the water outlet channel 12a in one direction, and one end of the water outlet channel 12a is connected to a water spraying head (not shown) through a fire-fighting water supply pipe 60 a. Since the liquid enters the valve body 10a through the water inlet channel 11a and leaves the valve body 10a through the water outlet channel 12a, the water inlet channel 11a is a water inlet end (i.e., primary side) and the water outlet channel 12a is a water outlet end (i.e., secondary side).

When the sprinkler head is actuated (i.e. spraying liquid), the liquid in the water outlet channel 12a flows to the sprinkler head through the fire-fighting liquid supply pipe 60a, so that the pressure drop phenomenon occurs in the water outlet channel 12a due to the reduction of the liquid, and a pressure difference is generated between the water inlet channel 11a and the water outlet channel 12 a; when the hydraulic pressure in the water outlet flow passage 12a is relatively lower than the hydraulic pressure in the water inlet flow passage 11a, the main valve 14a is driven to open, so that the liquid in the water inlet flow passage 11a flows into the water outlet flow passage 12a and flows to the sprinkler head through the fire-fighting liquid supply pipe 60 a.

However, the fire-fighting liquid supply pipe 60a belongs to a pressure discharge end, and there are usually bubbles inside, and in a normal state (when pressure is not released due to fire), the pressure inside the water outlet flow passage 12a is caused to be increased due to the influence of weather expansion and contraction, so that the hydraulic pressure inside the water outlet flow passage 12a is forced to be relatively higher than the hydraulic pressure inside the water inlet flow passage 11 a. When a fire occurs, the main valve 14a of the original fire alarm valve should be opened rapidly to supply a large flow of liquid to the water sprinkling head, at this moment, because the hydraulic pressure in the water outlet flow passage 12a is relatively higher than the hydraulic pressure in the water inlet flow passage 11a, the main valve 14a cannot be actuated rapidly (i.e., opened), and the main valve 14a must be opened until the hydraulic pressure in the water outlet flow passage 12a is relatively lower than the hydraulic pressure in the water inlet flow passage 11a, so that the phenomenon of delayed opening is caused, the time for sprinkling liquid by the water sprinkling head is forced to be delayed, the fire source cannot be extinguished immediately, and further, the loss caused by the fire is increased.

SUMMERY OF THE UTILITY MODEL

Accordingly, the present invention is directed to solve the problem that the primary side liquid in the water inlet channel cannot be rapidly supplied to the water outlet channel due to the delayed opening of the fire alarm valve caused by the secondary side hydraulic pressure in the water outlet channel being forced to be relatively higher than the secondary side hydraulic pressure in the water inlet channel due to the expansion with heat and the contraction with cold of the conventional fire alarm valve.

In order to achieve the purpose, the utility model adopts the technical scheme that:

an over-pressure backflow device of a fire alarm valve is used for adjusting hydraulic pressure in the fire alarm valve, a main valve, a water inlet flow channel and a water outlet flow channel are arranged in the fire alarm valve, the main valve is used for controlling liquid in the water inlet flow channel to be led to the water outlet flow channel in a one-way mode, when the hydraulic pressure in the water outlet flow channel is lower than the hydraulic pressure in the water inlet flow channel, the main valve is driven to open, and the over-pressure backflow device comprises: the backflow seat is arranged on the main valve, an installation channel communicated between the water inlet flow channel and the water outlet flow channel is formed in the backflow seat, the installation channel comprises a backflow hole communicated with the water inlet flow channel and a containing hole communicated with the water outlet flow channel, the backflow hole and the containing hole are mutually communicated, and the aperture of the backflow hole is relatively smaller than that of the containing hole; a spring seat which can be filled with a spring and is movably accommodated in the accommodating hole, wherein a propping plane and a return channel are formed on the spring seat, and the return channel is communicated with the return hole; the pressure regulating ring is provided with a pressing and pushing plane which can press and touch the abutting plane, and a liquid through hole which is positioned in the center of the pressing and pushing plane, and the liquid through hole is communicated with the containing hole; the pressure regulating ring is arranged in the accommodating hole, and the spring applies elastic thrust to drive the abutting plane of the spring seat to press and touch the pressing and pushing plane of the pressure regulating ring so as to control the time when the overpressure liquid in the water outlet flow channel flows back to the backflow channel, the backflow hole and the water inlet flow channel sequentially through the accommodating hole and the liquid through hole.

In further implementation, a neck portion and a seat portion are respectively formed at two ends of the spring seat, the abutting plane is formed on the neck portion, the diameter of the neck portion is relatively smaller than that of the seat portion, a cavity is formed between the outer surface of the neck portion and the hole wall of the accommodating hole, an accommodating groove used for filling the spring is formed in the seat portion, at least one through hole communicated with the cavity and the accommodating groove is formed in the neck portion, and the backflow channel is formed by the cavity, the through hole and the accommodating groove in a serial communication mode.

In a further implementation, the accommodating hole is made in a threaded hole shape, the pressure regulating ring is made in a threaded column shape, and the adjusting ring can be installed in the accommodating hole in a mode of being located at the axial position of the accommodating hole in an adjustable mode.

In further implementation, a check valve is fixedly arranged on the main valve, the check valve comprises a valve seat and a valve plug movably arranged in the valve seat, the valve hole area controlled by the valve plug is smaller than that of the main valve, the valve plug is used for controlling the liquid in the water inlet flow passage to be communicated with the water outlet flow passage in a one-way mode, and the backflow seat is fixedly arranged on the valve seat and further arranged on the main valve.

In a further implementation, the check valve further includes a first flow channel communicated with the water inlet flow channel and a second flow channel communicated with the water outlet flow channel, the first flow channel and the second flow channel are communicated with each other through the valve hole, and the return hole is communicated with the first flow channel.

According to the technical means, the utility model has the following effects: the overpressure backflow device is utilized to balance the hydraulic pressure in the water inlet flow passage and the water outlet flow passage at two ends of the main valve (namely, the hydraulic pressure of the secondary side and the primary side is balanced), the secondary side hydraulic pressure in the water outlet flow passage is prevented from being larger than the primary side hydraulic pressure in the water inlet flow passage due to the influence of weather thermal expansion and cold contraction, so that once a fire disaster happens, the secondary side hydraulic pressure in the water outlet flow passage communicated with the fire-fighting liquid supply pipe can be immediately reduced to be lower than the primary side hydraulic pressure in the water inlet flow passage along with the speed of releasing liquid, the main valve of the fire-fighting alarm valve can be opened immediately, the delayed opening phenomenon is avoided, the primary side liquid in the water inlet flow passage can be rapidly, continuously and massively supplied into the water outlet flow passage, the opening and liquid supply speed of the fire-fighting alarm valve is also improved, and the fire source is conveniently and rapidly extinguished.

In addition, details regarding related art in which the present invention may be practiced are set forth in the following detailed description and the accompanying drawings.

Drawings

Fig. 1 is a sectional view of a conventional fire alarm valve.

Fig. 2 is a sectional view of an overpressure return apparatus of the fire alarm valve of the present invention.

Fig. 3 is a partially enlarged schematic view of fig. 2.

FIG. 4 is a schematic view of the adjustment ring of FIG. 3 adjusted to the axial position of the receiving bore.

Fig. 5 is a schematic view of the liquid in the outlet channel of fig. 3 pushing the spring seat open into the inlet channel.

Description of reference numerals: 10a, 10 b-a valve body; 11a, 11 b-inlet flow channel; 12a, 12 b-an effluent channel; 13-valve port; 14a, 14 b-main valve; 20-a reflow block; 21-installing a channel; 211-a reflow aperture; 212-a containment hole; 30-spring seats; 31-neck portion; 32-a seat; 33-a holding plane; 34-a return channel; 341-chamber; 342-a containing groove; 343-a through hole; 35-a spring; 36-gap; 40-a voltage regulating ring; 41-pressing and pushing the plane; 42-liquid through hole; 50-a check valve; 51-a valve seat; 52-a valve plug; 53-valve hole; 54-a first flow channel; 55-a second flow channel; 60a, 60 b-fire fighting liquid supply pipe.

Detailed Description

Referring first to fig. 2, an aspect of a preferred embodiment of the present invention is disclosed, which illustrates an overpressure return apparatus for a fire alarm valve, which is provided in the present invention, for adjusting hydraulic pressure in the fire alarm valve, the valve body 10b of the fire alarm valve is provided with a water inlet channel 11b and a water outlet channel 12b, a valve port 13 is formed between the water inlet channel 11b and the water outlet channel 12b, the liquid in the water inlet channel 11b flows into the water outlet channel 12b through the valve port 13, a main valve 14b for controlling the opening and closing of the valve port 13 is elastically pivoted in the valve body 10b, the main valve 14b is used to control the liquid in the inlet channel 11b to flow into the outlet channel 12b in one direction, when the hydraulic pressure in the outlet flow passage 12b is lower than the hydraulic pressure in the inlet flow passage 11b, the main valve 14b is driven to open, so that the liquid in the inlet flow passage 11b flows into the outlet flow passage 12b through the valve port 13.

Referring to fig. 2 and 3, the overpressure return apparatus is illustrated as including: a return current seat 20, a spring seat 30 and a pressure regulating ring 40, wherein:

the backflow seat 20 is installed on the main valve 14b, and an installation channel 21 is formed in the backflow seat 20 and communicates between the water inlet channel 11b and the water outlet channel 12b, that is, the liquid in the water outlet channel 12b can flow back to the water inlet channel 11b through the installation channel 21. The installation channel 21 is formed by a backflow hole 211 communicating with the water inlet channel 11b and a containing hole 212 communicating with the water outlet channel 12b, in other words, the liquid in the water outlet channel 12b can flow back to the water inlet channel 11b through the containing hole 212 and the backflow hole 211, and the diameter of the backflow hole 211 is relatively smaller than that of the containing hole 212.

The spring seat 30 is movably received in the receiving hole 212, the spring seat 30 may be a circular column, two ends of the spring seat 30 respectively form a neck portion 31 and a seat portion 32, the seat portion 32 faces the return hole 211, the diameter of the neck portion 31 is relatively smaller than that of the seat portion 32, the neck portion 31 forms a supporting plane 33, a chamber 341 is formed between the outer surface of the neck portion 31 and the hole wall of the receiving hole 212, the seat portion 32 forms a receiving groove 342, the neck portion 31 further forms at least one through hole 343 communicating the chamber 341 and the receiving groove 342, the chamber 341, the through hole 343 and the receiving groove 342 are communicated to form a return channel 34, the return channel 34 and the return hole 211 are communicated with each other, in other words, when the liquid in the water outlet channel 12b flows into the receiving hole 212, the liquid can flow to the return hole 211 through the return channel 34, and then flows back into the water inlet channel 11b through the back flow hole 211. Furthermore, the accommodating groove 342 is filled with a spring 35, the spring 35 may be a helical compression spring, and the sectional area of the accommodating groove 342 is relatively larger than the return hole 211, so that the spring 35 can be supported against the periphery of the return hole 211 to apply an elastic pushing force to the spring seat 30.

The pressure adjusting ring 40 is installed in the accommodating hole 212, the spring seat 30 is located between the pressure adjusting ring 40 and the return hole 211, a pressing and pushing plane 41 capable of pressing and contacting the abutting plane 33 and a liquid passing hole 42 located in the center of the pressing and pushing plane 41 are formed on one side of the pressure adjusting ring 40 facing the spring seat 30, the liquid passing hole 42 and the accommodating hole 212 are communicated with each other, in other words, after the liquid in the water outlet flow channel 12b flows into the accommodating hole 212, the liquid can flow into the return channel 34 through the liquid passing hole 42.

In specific implementation, the spring 35 applies elastic pushing force to drive the abutting plane 33 of the spring seat 30 to press and contact the pressing plane 41 of the pressure regulating ring 40, so as to close the liquid through hole 42, and the liquid in the water outlet channel 12b cannot flow into the accommodating hole 212 through the liquid through hole 42; the layout area of the abutting plane 33 is relatively larger than the diameter area of the liquid through hole 42 in practice, so that the abutting plane 33 can reliably close the liquid through hole 42.

Referring to fig. 4, it is illustrated that the accommodating hole 212 is made in a threaded hole form, the pressure regulating ring 40 is made in a threaded column form, and the adjusting ring 40 can be adjustably installed in the accommodating hole 212 at an axial position of the accommodating hole 212, so as to adjust the elastic thrust of the spring 35 applied to the abutting plane 33 of the spring seat 30, but not limited thereto.

Referring to fig. 5, it is described that when the hydraulic pressure in the water outlet flow passage 12b is relatively higher than the hydraulic pressure in the water inlet flow passage 11b, and the pressure difference between the two is relatively greater than the elastic pushing force applied by the spring 35 to the supporting plane 33 of the spring seat 30, the spring seat 30 will be pushed by the liquid in the water outlet flow passage 12b, so that the supporting plane 33 is far away from the pushing plane 41, in addition to opening the originally closed liquid through hole 42 again, a gap 36 is generated between the supporting plane 33 and the pushing plane 41, so that the liquid in the water outlet flow passage 12b flows into the chamber 341 through the containing hole 212, the liquid through hole 42 and the gap 36, and flows to the return hole 211 through the return channel 34 formed by the communication among the chamber 341, the through hole 343 and the containing groove 342, and then flows back to the water inlet flow passage 11b through the return hole 211, further, the hydraulic pressure in the outlet flow path 12b and the hydraulic pressure in the inlet flow path 11b are balanced.

In addition, a check valve 50 may be fixed on the main valve 14b, the check valve 50 includes a valve seat 51, a first flow channel 54 communicating with the water inlet flow channel 11b and a second flow channel 55 communicating with the water outlet flow channel 12b are formed in the valve seat 51, a valve hole 53 is formed between the first flow channel 54 and the second flow channel 55, the liquid in the first flow channel 54 flows into the second flow channel 55 through the valve hole 53, a valve plug 52 controlling the opening and closing of the valve hole 53 is movably installed in the valve seat 51, the valve plug 52 is used to control the liquid in the first flow channel 54 to unidirectionally flow into the second flow channel 55, the cross-sectional area of the valve hole 53 is relatively smaller than the valve port 13, in other words, the flow rate of the liquid passing through the valve hole 53 is relatively smaller than the flow rate of the liquid passing through the valve port 13. The backflow seat 20 is fixed radially to the valve seat 51 and is installed on the main valve 14b, and the backflow hole 211 communicates with the first flow channel 51, in other words, the liquid in the water outlet flow channel 12b can flow back to the water inlet flow channel 11b through the accommodating hole 212, the liquid through hole 42, the backflow channel 34, the backflow hole 211 and the first flow channel 51.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides an excessive pressure reflux unit of fire control alarm valve for adjust the hydraulic pressure in the fire control alarm valve, have a main valve, a water inlet channel and a water outlet channel in this fire control alarm valve, this main valve is used for controlling the one-way this water outlet channel that leads to of liquid in this water inlet channel, drives this main valve and opens the valve when the hydraulic pressure in this water outlet channel is less than the hydraulic pressure in this water inlet channel, its characterized in that, this excessive pressure reflux unit includes:

the backflow seat is arranged on the main valve, an installation channel communicated between the water inlet flow channel and the water outlet flow channel is formed in the backflow seat, the installation channel is formed by mutually communicating a backflow hole communicated with the water inlet flow channel and an accommodating hole communicated with the water outlet flow channel, and the aperture of the backflow hole is relatively smaller than that of the accommodating hole;

a spring seat which can be filled with a spring and is movably accommodated in the accommodating hole, wherein a propping plane and a return channel are formed on the spring seat, and the return channel is communicated with the return hole;

the pressure regulating ring is provided with a pressing and pushing plane which can press and touch the abutting plane, and a liquid through hole which is positioned in the center of the pressing and pushing plane, and the liquid through hole is communicated with the containing hole;

the pressure regulating ring is arranged in the accommodating hole, and the spring applies elastic thrust to drive the abutting plane of the spring seat to press and touch the pressing and pushing plane of the pressure regulating ring so as to control the time when the overpressure liquid in the water outlet flow channel flows back to the backflow channel, the backflow hole and the water inlet flow channel sequentially through the accommodating hole and the liquid through hole.

2. A fire alarm overpressure return apparatus as set forth in claim 1 wherein: the two ends of the spring seat are respectively provided with a neck part and a seat part, the abutting plane is formed on the neck part, the diameter of the neck part is relatively smaller than that of the seat part, a cavity is formed between the outer surface of the neck part and the hole wall of the accommodating hole, the seat part is provided with an accommodating groove used for filling the spring, the neck part is also provided with at least one through hole communicated with the cavity and the accommodating groove, and the backflow channel is formed by the cavity, the through hole and the accommodating groove in a serial communication mode.

3. A fire alarm overpressure return apparatus as set forth in claim 1 wherein: the accommodating hole is made into a threaded hole shape, the pressure regulating ring is made into a threaded column shape, and the adjusting ring can be arranged in the accommodating hole in a mode of being positioned at the axial position of the accommodating hole in an adjustable mode.

4. A fire alarm valve overpressure return apparatus as set forth in any one of claims 1 to 3 wherein: the main valve is fixedly provided with a check valve, the check valve comprises a valve seat and a valve plug movably arranged in the valve seat, the area of a valve hole controlled by the valve plug is smaller than that of the main valve, the valve plug is used for controlling the liquid of the water inlet flow passage to be led to the water outlet flow passage in a one-way mode, and the backflow seat is fixedly arranged on the valve seat and further arranged on the main valve.

5. A fire alarm overpressure return apparatus as set forth in claim 4 wherein: the check valve also comprises a first flow passage communicated with the water inlet flow passage and a second flow passage communicated with the water outlet flow passage, the first flow passage and the second flow passage are communicated with each other through the valve hole, and the return hole is communicated with the first flow passage.