Intelligent pressure adjusting system for fire-fighting pipeline of long downhill tunnel of expressway

Abstract

The utility model relates to the technical field of fire-fighting pipelines, in particular to an intelligent pressure adjusting system for a fire-fighting pipeline of a long downhill tunnel of an expressway, which comprises an upper-end water inlet pipe and a lower-end water outlet pipe which are connected in the fire-fighting pipeline, one end of the upper-end water inlet pipe is connected with a Y-shaped filter through a flange, and one side of the Y-shaped filter is provided with a pressure reducing valve. A flow blocking pipe is arranged on one side of the pressure reducing valve, a flow blocking assembly used for preventing the water hammer effect from damaging the diaphragm is fixedly arranged in the flow blocking pipe, one end of the flow blocking pipe is connected with a gate valve through a flange, and the gate valve is connected with one end of the lower end water outlet pipe through a flange. According to the intelligent pressure adjusting system for the fire fighting pipeline of the long downhill tunnel of the expressway, when the gate valve is closed, liquid flows back due to the water hammer effect so as to drive the flow stopping block to move, and after one end of the flow stopping block is attached to the fixing ring, the flow stopping effect on the liquid can be formed, so that the water hammer effect is prevented from impacting and damaging a pressure reducing valve diaphragm; the service life of the pressure reducing valve can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting pipelines, in particular to an intelligent pressure regulating system for fire-fighting pipelines in long downhill tunnels of expressways. Background Art

[0002] The fire protection system of a long downhill tunnel has a large difference in terrain between the inlet and outlet, which leads to uneven pressure in the fire protection pipe network. During the water replenishment process of the fire pump, the pressure at the beginning of the tunnel fire protection pipe is relatively small, while the pressure at the end is too large. This will result in slow water supply at the beginning of the fire protection pipe and easy pipe burst at the end, posing certain safety hazards. The current solution is to install a pressure reducing valve in the pipeline to balance the pipeline pressure. However, due to the water hammer effect when the valve is closed, that is, due to the inertia of the liquid, the liquid will generate an instantaneous impact force when the valve is closed, which can easily cause damage to the diaphragm in the pressure reducing valve and reduce the service life of the pressure reducing valve. Utility Model Content

[0003] In view of the deficiencies of the prior art, the utility model provides an intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on highways, which solves the technical problem that the diaphragm of the pressure reducing valve is easily damaged due to the water hammer effect when the valve is closed.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: an intelligent pressure regulating system for fire protection pipelines in long downhill tunnels of expressways, comprising an upper water inlet pipe and a lower water outlet pipe connected in the fire protection pipeline, one end of the upper water inlet pipe is connected to a Y-type filter through a flange, a pressure reducing valve is provided on one side of the Y-type filter, a choke pipe is provided on one side of the pressure reducing valve, a choke assembly for preventing a diaphragm from being damaged by a water hammer effect is fixed in the choke pipe, one end of the choke pipe is connected to a gate valve through a flange, and the gate valve is connected to one end of the lower water outlet pipe through a flange;

[0005] The choke assembly includes a fixed ring fixed in the choke tube, a fixed plate fixed on the side wall of the fixed ring, the fixed plate is fixedly connected to one end of the guide rod, the other end of the guide rod passes through the fixed ring and is fixed with a limit block, and the choke block is sleeved on the outer wall of the guide rod.

[0006] Preferably, a cleaning port with an end cover is provided at the bottom of the Y-type filter.

[0007] Preferably, two pressure gauges are connected at both ends of the pressure reducing valve via flanges, and the two pressure gauges are respectively connected between the Y-type filter and the pressure reducing valve and between the pressure reducing valve and the choke tube via flanges.

[0008] Preferably, an inner conical surface is provided on the inner side of the fixing ring, and an outer conical surface matching the inner conical surface is provided on one side of the baffle block.

[0009] Preferably, the baffle block is provided with a plurality of flow guide holes distributed in an annular shape.

[0010] Preferably, it also includes a communication base station connected to the signals of the two pressure gauges, the communication base station is connected to the server terminal by signal, and the server terminal is connected to the monitoring platform by signal.

[0011] By means of the above technical solution, the utility model provides an intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on highways, which has at least the following beneficial effects:

[0012] 1. The intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on highways is equipped with a flow-blocking component. When the gate valve is closed, the liquid flows back due to the water hammer effect, thereby driving the flow-blocking block to move. After one end of the flow-blocking block is fitted with the fixing ring, a flow-blocking effect on the liquid can be formed, thereby avoiding the water hammer effect from impacting and damaging the pressure reducing valve diaphragm, and prolonging the service life of the pressure reducing valve.

[0013] 2. The intelligent pressure regulation system for fire-fighting pipes in long downhill tunnels on the expressway solves the problem of low tunnel inlet pressure and excessive tunnel outlet pressure due to the height difference between the beginning and end of the tunnel fire-fighting pipe network by setting pressure reducing valves and pressure gauges, thus avoiding safety accidents such as fire-fighting pipe bursts. It can also remotely monitor the pressure value of the tunnel fire-fighting pipe network in real time to eliminate potential fire hazards in the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure inside the choke tube of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the flow-blocking component of the utility model in front cross-section;

[0018] Figure 4 This is a module block diagram for remote real-time monitoring of pipe network pressure in the utility model.

[0019] Reference numerals:

[0020] 1. Upper water inlet pipe; 2. Y-type filter; 21. End cover; 3. Pressure reducing valve; 4. Pressure gauge; 5. Choke tube; 6. Choke assembly; 61. Fixed ring; 611. Inner cone; 62. Fixed plate; 63. Guide rod; 64. Choke block; 641. Outer cone; 642. Diversion hole; 65. Limit block; 7. Gate valve; 8. Lower water outlet pipe; 9. Communication base station; 10. Server terminal; 11. Monitoring platform. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The fire-fighting system of a long downhill tunnel has a large difference in terrain between the inlet and the outlet, which leads to uneven pressure in the fire-fighting pipe network. Some tunnel water fire-fighting systems are self-contained closed-loop control systems. During normal operation, the pressure-stabilizing pump replenishes water and stabilizes the pressure to keep the pipe network system in a stable pressure state. Once a fire occurs, the pipeline system is short of water, causing the pressure of the pipe network to drop. When the pressure drops to the starting pressure of the fire pump, the fire pump is started immediately, and the pressure-stabilizing pump stops working until the fire is extinguished. The fire pump stops working and is manually restored to the initial state. In some long downhill tunnels, the height difference from the tunnel inlet to the tunnel outlet reaches 74.4 meters and 79.52 meters. According to the calculation of 1m water column = 0.01MPa, the pressure difference between the inlet and outlet of the water fire-fighting system of the above two tunnels reaches 0.744MPa and 0.795MPa.

[0023] Embodiment 1:

[0024] Based on the technical defects of the prior art that the diaphragm of the pressure reducing valve 3 is easily damaged due to the water hammer effect, please refer to Figure 1-Figure 4 The utility model provides an intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on highways. The flow-blocking block 64 can form a flow-blocking effect on the liquid, thereby preventing the water hammer effect from impacting and damaging the diaphragm of the pressure reducing valve 3, and improving the service life of the pressure reducing valve 3. The utility model has an upper water inlet pipe 1 and a lower water outlet pipe 8 connected in the fire protection pipeline. One end of the upper water inlet pipe 1 is connected with a Y-type filter 2 through a flange, and a pressure reducing valve 3 is arranged on one side of the Y-type filter 2. A flow-blocking pipe 5 is arranged on one side of the pressure reducing valve 3. A flow-blocking component 6 for preventing the diaphragm from being damaged by the water hammer effect is fixed in the flow-blocking pipe 5. A gate valve 7 is connected to one end of the flow-blocking pipe 5 through a flange, and the gate valve 7 is connected to one end of the lower water outlet pipe 8 through a flange. The liquid enters from the upper water inlet pipe 1, and impurities in the water are filtered out by the Y-type filter 2. Then, the pressure at the end of the pipe network is reduced by the pressure reducing valve 3, and then the liquid enters the gate valve 7 after passing through the flow-blocking pipe 5, and then flows out through the lower water outlet pipe 8 after passing through the gate valve 7.

[0025] To avoid water hammer effect when the gate valve 7 is closed, which may damage the diaphragm on the pressure reducing valve 3, please refer to Figure 2 and Figure 3The choke assembly 6 includes a fixed ring 61 fixed in the choke tube 5, a fixed plate 62 is fixed on the side wall of the fixed ring 61, the fixed plate 62 is fixedly connected to one end of the guide rod 63, the other end of the guide rod 63 passes through the fixed ring 61 and is fixedly provided with a limit block 65, and a choke block 64 is sleeved on the outer wall of the guide rod 63. When the gate valve 7 is closed, the liquid will generate an instantaneous impact force, and the impact force enters the choke tube 5 along the refluxed liquid, thereby driving the choke block 64 to move. After one end of the choke block 64 is in contact with the fixed ring 61, a choke effect on the liquid can be formed, thereby preventing the diaphragm of the pressure reducing valve 3 from being damaged by the impact of the liquid.

[0026] In order to facilitate cleaning of filtered impurities inside the Y-type filter 2, a cleaning port with an end cover 21 is provided at the bottom of the Y-type filter 2. After opening the end cover 21, the impurities can be taken out along the cleaning port, which is convenient for cleaning.

[0027] In order to facilitate the monitoring of the pipeline network pressure value, two pressure gauges 4 are connected at both ends of the pressure reducing valve 3 through flanges. The two pressure gauges 4 are respectively connected between the Y-type filter 2 and the pressure reducing valve 3 and between the pressure reducing valve 3 and the choke tube 5 through flanges. By setting up two pressure gauges 4, the pressure difference before and after the pressure reducing valve 3 can be monitored in real time, which helps the operator understand the working status of the system. By comparing the pressure difference before and after, it can be determined whether the pressure reducing valve 3 is working normally and whether it needs maintenance or replacement.

[0028] In order to facilitate the baffle block 64 to achieve a better flow-guiding effect, an inner conical surface 611 is provided on the inner side of the fixing ring 61, and an outer conical surface 641 that matches the inner conical surface 611 is provided on one side of the baffle block 64. When water is discharged normally, the liquid can flow along the outer conical surface 641 of the baffle block 64 after passing through the fixing ring 61, thereby reducing the resistance to normal water discharge and avoiding the problem of unsmooth water discharge.

[0029] In order to facilitate the normal discharge of water, a plurality of guide holes 642 distributed in an annular shape are opened on the baffle block 64 , and water can flow out of the baffle block 64 through the guide holes 642 .

[0030] Embodiment 2:

[0031] In actual use, in order to facilitate online real-time monitoring of the pressure status of the pipeline network, please refer to Figure 4 On the basis of the first embodiment, it also includes a communication base station 9 connected to the two pressure gauges 4 by signal, the communication base station 9 is connected to the server terminal 10 by signal, the server terminal 10 is connected to the monitoring platform 11 by signal, the pressure gauge 4 monitors the pressure data and then uploads it to the server terminal 10 through the communication base station 9, the monitoring personnel remotely access the server terminal 10 through the monitoring platform 11 to obtain the pipe network pressure data, thereby achieving the purpose of remote online supervision.

[0032] It can be seen from the above embodiments that when the gate valve 7 is opened, the liquid enters from the upper water inlet pipe 1, and the impurities in the water are filtered out by the Y-type filter 2, and then the pressure at the end of the pipe network is reduced by the pressure reducing valve 3, and then the liquid enters the gate valve 7 after passing through the choke tube 5, and flows out through the lower water outlet pipe 8 after passing through the gate valve 7. When the gate valve 7 is closed, the liquid will generate an instantaneous impact force, and the impact force enters the choke tube 5 along the refluxed liquid, thereby driving the choke block 64 to move. After one end of the choke block 64 is fitted with the fixing ring 61, a choke effect on the liquid can be formed, thereby preventing the diaphragm of the pressure reducing valve 3 from being damaged by the impact of the liquid.

[0033] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent pressure regulating system for fire-fighting pipelines in long downhill tunnels on expressways, comprising an upper water inlet pipe (1) and a lower water outlet pipe (8) connected in the fire-fighting pipeline, characterized in that: One end of the upper water inlet pipe (1) is connected to a Y-type filter (2) via a flange, a pressure reducing valve (3) is provided on one side of the Y-type filter (2), a choke tube (5) is provided on one side of the pressure reducing valve (3), a choke assembly (6) for preventing the diaphragm from being damaged by a water hammer effect is fixedly provided in the choke tube (5), one end of the choke tube (5) is connected to a gate valve (7) via a flange, and the gate valve (7) is connected to one end of the lower water outlet pipe (8) via a flange; The flow-blocking assembly (6) comprises a fixing ring (61) fixedly arranged in the flow-blocking tube (5); a fixing plate (62) is fixedly arranged on the side wall of the fixing ring (61); the fixing plate (62) is fixedly connected to one end of a guide rod (63); the other end of the guide rod (63) passes through the fixing ring (61) and is fixedly arranged with a limit block (65); and a flow-blocking block (64) is sleeved on the outer wall of the guide rod (63).

2. The intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on expressways according to claim 1 is characterized by: A cleaning port with an end cover (21) is provided at the bottom of the Y-shaped filter (2).

3. The intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on expressways according to claim 1 is characterized by: Two pressure gauges (4) are connected to both ends of the pressure reducing valve (3) via flanges, and the two pressure gauges (4) are respectively connected to the Y-type filter (2) and the pressure reducing valve (3) and between the pressure reducing valve (3) and the choke tube (5) via flanges.

4. The intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on expressways according to claim 1 is characterized by: An inner conical surface (611) is provided on the inner side of the fixing ring (61), and an outer conical surface (641) matching the inner conical surface (611) is provided on one side of the baffle block (64).

5. The intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on expressways according to claim 1 is characterized by: The baffle block (64) is provided with a plurality of flow guide holes (642) distributed in an annular shape.

6. The intelligent pressure regulating system for fire protection pipelines in long downhill tunnels on expressways according to claim 3 is characterized by: It also includes a communication base station (9) connected to the two pressure gauges (4) by signals, the communication base station (9) is connected to the server terminal (10) by signals, and the server terminal (10) is connected to the monitoring platform (11) by signals.

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