TWM615049U - Overpressure backflow device of fire alarm valve - Google Patents

Abstract

The present model provides an overpressure return device for a fire alarm valve, which is used to adjust the hydraulic pressure in the fire alarm valve. The fire alarm valve has a main valve, an inlet flow channel and an outlet flow channel. The overpressure return device includes a A return seat installed on the main valve. The return seat has a return hole communicating with the water inlet flow channel and an accommodating hole communicating with the water outlet flow channel in series with each other. The accommodating hole contains a spring seat and a A pressure regulating ring, the pressure regulating ring is formed with a liquid through hole, the spring seat is driven by an elastic thrust exerted by a spring to press the pressure regulating ring to control the overpressure liquid in the outlet flow channel to return to The timing of the inlet flow channel improves the problem of delay in opening of the traditional fire alarm valve because the hydraulic pressure in the outlet flow channel is relatively higher than the hydraulic pressure in the inlet flow channel.

Description

Overpressure backflow device of fire alarm valve

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

The fire alarm valve is used to control the flow of liquid (fire fighting water, foam water) in the fire fighting liquid supply pipe. The fire fighting liquid supply pipe is connected to the sprinkler. When a fire occurs, the fire alarm valve opens continuously and massively. Supply liquid to the sprinkler, and the sprinkler sprays the liquid onto the fire source. In addition to reducing the temperature of the fire source, it can also isolate the fire source from contacting oxygen, thereby achieving the effect of extinguishing fire.

Please refer to FIG. 1, which illustrates that the valve body 10a of the fire alarm valve has a main valve 14a, an inlet flow passage 11a, and an outlet flow passage 12a. The main valve 14a is used to control the one-way liquid in the inlet flow passage 11a. Leading to the water outlet channel 12a, one end of the water outlet channel 12a is connected to a sprinkler (not shown) via a fire-fighting liquid supply pipe 60a. Since the liquid enters the valve body 10a through the inlet flow passage 11a, and then leaves the valve body 10a through the outlet flow passage 12a, the inlet flow passage 11a is the water inlet end (that is, the primary side). The water flow channel 12a is the water outlet (that is, the secondary side).

When the sprinkler is activated (ie spraying liquid), the liquid in the outlet flow channel 12a flows to the sprinkler through the fire-fighting liquid supply pipe 60a, causing the pressure drop in the outlet flow channel 12a due to the decrease of liquid, resulting in the inlet flow channel 11a There is a pressure difference between the two and the outlet flow passage 12a; when the hydraulic pressure in the outlet flow passage 12a is relatively lower than the hydraulic pressure in the inlet flow passage 11a, the main valve 14a will be driven to open, so that the inlet flow passage The liquid in 11a flows into the water outlet channel 12a, and flows to the sprinkler through the fire-fighting liquid supply pipe 60a.

However, the fire-fighting liquid supply pipe 60a belongs to the discharge end, and the inside is usually There are bubbles. Under normal conditions (when the pressure is not released due to fire), it will be affected by the weather's thermal expansion and contraction, which will cause the internal pressure in the outlet flow passage 12a to be generated, forcing the hydraulic pressure in the outlet flow passage 12a to be relatively higher than the The hydraulic pressure in the inlet flow passage 11a. When a fire occurs, the main valve 14a of the original fire alarm valve should be opened quickly to supply a large flow of liquid to the sprinkler. At this moment, the hydraulic pressure in the outlet flow passage 12a is relatively higher than the hydraulic pressure in the inlet flow passage 11a. , Making the main valve 14a unable to act quickly (that is, opening the valve), the main valve 14a will be opened only when the hydraulic pressure in the outlet flow passage 12a is relatively lower than the hydraulic pressure in the inlet flow passage 11a, thus causing a delay The phenomenon of opening the valve forces the sprinkler to delay the spraying time of the liquid, which makes it impossible to extinguish the fire source immediately, thereby increasing the loss caused by the fire.

In view of this, the purpose of this new model is to improve the traditional fire alarm valve due to thermal expansion and contraction, which forces the secondary side hydraulic pressure in the outlet flow passage to be relatively higher than the secondary side hydraulic pressure in the inlet flow passage, resulting in the delay of the fire alarm valve. Open the valve, so that the primary side liquid in the inlet flow channel cannot be quickly supplied to the outlet flow channel, thereby providing an overpressure return device for the fire alarm valve, which is used to adjust the hydraulic pressure in the fire alarm valve. There is a main valve, an inlet flow channel and an outlet flow channel, the main valve is used to control the liquid in the inlet flow channel to one-way to the outlet flow channel, the hydraulic pressure in the outlet flow channel is lower than the inlet flow The main valve is driven to open by the hydraulic pressure in the channel. The overpressure backflow device includes: a backflow seat installed on the main valve, and a backflow seat is formed in the backflow seat to communicate between the water inlet channel and the outlet water channel. An installation channel, the installation channel comprising a return hole communicating with the water inlet flow channel, and an accommodating hole communicating with the water outlet flow channel, the hole diameter of the return hole is relatively smaller than the accommodating hole; a spring seat , Can be filled with a spring and movably accommodated in the accommodating hole, the spring seat is formed with a resisting plane and a return channel, the return channel and the return hole are communicated with each other; a pressure regulating ring is formed with an energy pressure The pressing plane that touches the resisting plane, and a liquid through hole located in the center of the pressing plane, the through liquid hole and the accommodating hole communicate with each other; wherein, the pressure regulating ring is installed in the accommodating hole, the The spring exerts an elastic pushing force to drive the resisting plane of the spring seat to press against the pushing plane of the pressure regulating ring to control the output The timing for the overpressured liquid in the water flow channel to flow back to the return channel, the return hole and the water inlet flow channel through the containing hole and the liquid hole in sequence.

In a further implementation, the two ends of the spring seat respectively form a neck and a seat, the resisting plane is formed on the neck, the diameter of the neck is relatively smaller than the seat, the outer surface of the neck and the container A cavity is formed between the walls of the accommodating hole, the seat is formed with an accommodating groove for filling the spring, and at least one through hole connecting the cavity and the accommodating groove is formed on the neck. The reflux channel is formed by the cavity, the through hole and the accommodating groove in series.

In a further implementation, the accommodating hole is in the form of a threaded hole, and the pressure regulating ring is in the form of a threaded column, so that the pressure regulating ring can be installed in a form that can be adjusted in the axial position of the accommodating hole In the containing hole.

In a further implementation, a check valve is fixed on the main valve, the check valve includes a valve seat and a valve plug movably installed in the valve seat, and the valve hole area controlled by the valve plug is smaller than that of the main valve, The valve plug is used to control the one-way flow of liquid from the inlet flow path to the outlet flow path, and the return seat is fixed on the valve seat and then installed on the main valve.

In a further implementation, the check valve further includes a first flow channel communicating with the inlet flow channel and a second flow channel communicating with the outlet flow channel, and the first flow channel and the second flow channel are mutually connected via the valve hole. Connected, and the return hole communicates with the first flow channel.

According to the above technical means, the effectiveness of the present invention is to use the overpressure return device to balance the hydraulic pressure in the inlet and outlet channels at both ends of the main valve (ie balance the hydraulic pressure on the secondary side and the primary side) to avoid the outlet channel The secondary hydraulic pressure inside is greater than the primary hydraulic pressure in the inlet flow channel due to weather thermal expansion and contraction, so that once a fire occurs, the secondary hydraulic energy in the outlet flow channel connected to the fire-fighting liquid supply pipe follows The speed of the discharge liquid is immediately reduced to lower than the hydraulic pressure of the primary side in the inlet flow channel, so that the main valve of the fire alarm valve can be opened immediately, and the delayed valve opening phenomenon will not occur, so that the primary side in the inlet flow channel The liquid can be supplied to the outlet flow channel quickly, continuously and in large quantities, that is, the opening and supply speed of the fire alarm valve is increased, so as to quickly extinguish the fire source.

In addition, the relevant technical details on which the present invention can be implemented will be described in the subsequent implementation modes and drawings.

10a, 10b: valve body

11a, 11b: Inlet runner

12a, 12b: Outlet flow channel

13: Valve port

14a, 14b: main valve

20: Return seat

21: installation channel

211: Recirculation hole

212: accommodating hole

30: Spring seat

31: Neck

32: Seat

33: Resist the plane

34: Return channel

341: Chamber

342: Containment Slot

343: Through Hole

35: spring

36: Clearance

40: pressure regulating ring

41: Push plane

42: Through hole

50: check valve

51: Valve seat

52: Valve plug

53: valve hole

54: first runner

55: second runner

60a, 60b: fire-fighting liquid supply pipe

Figure 1 is a cross-sectional view of a conventional fire alarm valve.

Figure 2 is a cross-sectional view of the overpressure backflow device of the new fire alarm valve.

Fig. 3 is a partial enlarged schematic diagram of Fig. 2.

Fig. 4 is a schematic diagram of the adjustment position of the pressure regulating ring in Fig. 3 at the axial position of the accommodating hole.

Fig. 5 is a schematic diagram of the liquid in the water outlet channel of Fig. 3 pushing away the spring seat and entering the water inlet channel.

First of all, please refer to Figure 2 to disclose the aspect of a preferred embodiment of the present invention. The overpressure return device of the fire alarm valve provided by the present invention is used to adjust the hydraulic pressure in the fire alarm valve. The valve body 10b is provided with an inlet flow passage 11b and an outlet flow passage 12b. A valve port 13 is formed between the inlet flow passage 11b and the outlet flow passage 12b, and the liquid in the inlet flow passage 11b flows in through the valve port 13 In the water outlet passage 12b, the valve body 10b is elastically pivoted with a main valve 14b that controls the opening and closing of the valve port 13. In the water flow passage 12b, 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 through the valve port 13 The water flow channel 12b.

Please refer to FIGS. 2 and 3 together. It is illustrated that the overpressure backflow device includes: a backflow seat 20, a spring seat 30, and a pressure regulating ring 40. The backflow seat 20 is installed on the main valve 14b. An installation channel 21 is formed in the seat 20 to communicate 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 Inside. In practice, the installation channel 21 is formed by a return hole 211 communicating with the water inlet flow path 11b and a containing hole 212 communicating with the water outlet flow path 12b in series with each other. In other words, the liquid in the water outlet flow path 12b can Pass this The accommodating hole 212 and the return hole 211 flow back into the water inlet channel 11 b, and the hole diameter of the return hole 211 is relatively smaller than the accommodating hole 212.

The spring seat 30 is movably accommodated in the accommodating hole 212. The spring seat 30 can be a circular cylinder. The two ends of the spring seat 30 respectively form a neck 31 and a seat 32. The seat 32 Towards the return hole 211, the diameter of the neck 31 is relatively smaller than the seat 32, the neck 31 is formed with a resisting plane 33, and a gap is formed between the outer surface of the neck 31 and the wall of the accommodating hole 212 A cavity 341, the seat 32 is formed with an accommodating groove 342, the neck 31 is also formed with at least one through hole 343 communicating the cavity 341 and the accommodating groove 342, the cavity 341, the through hole 343 and the containing groove 342 are connected in series to form a return passage 34, and the return passage 34 and the return hole 211 are in communication with each other. In other words, when the liquid in the outlet channel 12b flows into the containing hole 212 After being inside, it can flow to the backflow hole 211 through the backflow channel 34, and then backflow into the water inlet flow channel 11b through the backflow hole 211. Furthermore, the accommodating groove 342 is filled with a spring 35, and the spring 35 can be a spiral compression spring. The cross-sectional area of the accommodating groove 342 is relatively larger than the return hole 211, so that the spring 35 can resist the The periphery of the return hole 211 applies an elastic pushing force to the spring seat 30.

The pressure regulating ring 40 is installed in the accommodating hole 212, and the spring seat 30 is located between the pressure regulating ring 40 and the return hole 211, and the pressure regulating ring 40 is formed toward one side of the spring seat 30 There is a pressing plane 41 capable of pressing against the resisting plane 33, and a liquid through hole 42 located in the center of the pressing plane 41. The through liquid hole 42 and the containing hole 212 communicate with each other, in other words, the water outlet channel After the liquid in 12b flows into the containing hole 212, it can flow into the return channel 34 through the through-liquid hole 42.

In specific implementation, the spring 35 exerts an elastic pushing force to drive the resisting plane 33 of the spring seat 30 to press against the pushing plane 41 of the pressure regulating ring 40, thereby closing the through-liquid hole 42 to make the water outlet flow channel 12b The liquid cannot flow into the accommodating hole 212 through the through-liquid hole 42; the arrangement area of the resisting plane 33 is relatively larger than the diameter area of the through-liquid hole 42 in implementation, so that the resisting plane 33 can reliably close the accommodating hole 212. Through liquid hole 42.

Please refer to FIG. 4, which illustrates that the accommodating hole 212 is a threaded hole. The pressure regulating ring 40 is made into a threaded column shape, so that the pressure regulating ring 40 can be installed in the accommodating hole 212 in a form that can be adjusted in the axial position of the accommodating hole 212, thereby adjusting The elastic thrust exerted by the spring 35 on the resisting plane 33 of the spring seat 30 is not limited to this.

Please refer to FIG. 5, which illustrates that when the hydraulic pressure in the outlet flow passage 12b is relatively higher than the hydraulic pressure in the inlet flow passage 11b, and the pressure difference between the two is relatively greater than the resistance of the spring 35 to the spring seat 30 When the plane 33 is elastically pushed, the spring seat 30 will be pushed by the liquid in the water outlet channel 12b, and the resisting plane 33 will be far away from the pressing plane 41, except that the originally closed liquid hole 42 will be opened again. In addition, a gap 36 is created between the resisting plane 33 and the pressing plane 41, so that the liquid in the water outlet channel 12b flows into the accommodating hole 212, the liquid through hole 42, and the gap 36. Inside the chamber 341, and flow to the return hole 211 through the return channel 34 formed by the cavity 341, the through hole 343 and the containing groove 342 in series, and then return to the return hole 211 through the return hole 211 In the inlet flow passage 11b, the hydraulic pressure in the outlet flow passage 12b and the hydraulic pressure in the inlet flow passage 11b are in a balanced state.

In addition, a check valve 50 may be fixed on the main valve 14b. The check valve 50 includes a valve seat 51 in which a first flow channel 54 communicating with the water inlet flow channel 11b and a first flow channel 54 communicating with the water inlet flow channel 11b are opened. The second flow passage 55 of the outlet flow passage 12b, a valve hole 53 is formed between the first flow passage 54 and the second flow passage 55, and the liquid in the first flow passage 54 flows into the second flow passage 55 through the valve hole 53 Inside, the valve seat 51 is movably installed with a valve plug 52 that controls the opening and closing of the valve hole 53. The valve plug 52 is used to control the liquid in the first flow passage 54 to flow into the second flow passage 55 in one direction. 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. In practice, the return seat 20 is fixed in the radial direction of the valve seat 51 and then installed on the main valve 14b, and the return hole 211 communicates with the first flow passage 54. In other words, the liquid in the outlet flow passage 12b can be It flows back into the water inlet flow channel 11 b through the containing hole 212, the liquid through hole 42, the return channel 34, the return hole 211, and the first flow channel 54.

The above embodiments only express the preferred embodiments of the present invention, but Therefore, it cannot be understood as a limitation on the scope of the new patent. Therefore, this new model should be subject to the content of the claims defined in the scope of the patent application.

10b: Valve body

11b: Inlet runner

12b: Outlet flow channel

13: Valve port

14b: Main valve

20: Return seat

50: check valve

51: Valve seat

52: Valve plug

53: valve hole

54: first runner

55: second runner

60b: Fire-fighting liquid supply pipe

Claims (5)

An overpressure return device for a fire alarm valve is used to adjust the hydraulic pressure in the fire alarm valve. The fire alarm valve has a main valve, an inlet flow channel and an outlet flow channel, and the main valve is used to control the inlet flow channel. The liquid inside leads to the outlet channel in one direction. When the hydraulic pressure in the outlet channel is lower than the hydraulic pressure in the inlet channel, the main valve is driven to open. The overpressure backflow device includes: a backflow seat installed on the On the main valve, an installation channel connected between the inlet flow channel and the outlet flow channel is formed in the return seat, and the installation channel includes a backflow hole communicating with the inlet flow channel and an installation channel communicating with the outlet flow channel. The accommodating holes communicate with each other, and the aperture of the return hole is relatively smaller than the accommodating hole; a spring seat can be filled with a spring and movably accommodated in the accommodating hole, and a resisting plane is formed on the spring seat And a backflow channel, the backflow channel and the backflow hole are in communication with each other; a pressure regulating ring is formed with a pressing plane capable of pressing against the resisting plane, and a liquid through hole located in the center of the pressing plane, the liquid through The hole and the accommodating hole communicate with each other; wherein, the pressure regulating ring is installed in the accommodating hole, and the spring exerts an elastic pushing force to drive the resisting plane of the spring seat to press against the pushing plane of the pressure regulating ring. The timing of the overpressured liquid in the outlet flow channel to flow back to the return channel, the return hole and the water inlet flow channel through the containing hole and the through-liquid hole in sequence is controlled. The overpressure return device of the fire alarm valve according to claim 1, wherein the two ends of the spring seat respectively form a neck and a seat, the abutment plane is formed on the neck, and the diameter of the neck is relatively smaller than the seat A cavity is formed between the outer surface of the neck and the wall of the accommodating hole, the seat is formed with an accommodating groove for filling the spring, and at least one cavity communicating with the cavity is formed on the neck The through hole of the chamber and the accommodating groove, and the backflow channel is formed by the cavity, the through hole and the accommodating groove in series. The overpressure return device of the fire alarm valve according to claim 1, wherein the accommodating hole is made into a threaded hole shape, and the pressure regulating ring is made into a threaded column shape, so that the pressure regulating ring can be adjusted in position The axial position of the accommodating hole is installed in the accommodating hole. The overpressure return device for a fire alarm valve according to any one of claims 1 to 3, wherein a check valve is fixed on the main valve, and the check valve includes a valve seat and is movably installed in the valve seat A valve plug, the valve hole area controlled by the valve plug is smaller than the main valve, the valve plug is used to control the one-way flow of liquid from the inlet flow path to the outlet flow path, and the return seat is fixed on the valve seat and then Install on the main valve. The overpressure backflow device of the fire alarm valve according to claim 4, wherein the check valve further includes a first flow path communicating with the inlet flow path and a second flow path communicating with the outlet flow path, the first flow path and The second flow channel communicates with each other through the valve hole, and the return hole communicates with the first flow channel.

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