CN105944258B

CN105944258B - Stay cable tower end fire extinguishing system

Info

Publication number: CN105944258B
Application number: CN201610503234.7A
Authority: CN
Inventors: 吴明威; 陈林; 刘冬冬; 周雷; 张后登
Original assignee: CCCC Second Harbor Engineering Co
Current assignee: CCCC Second Harbor Engineering Co
Priority date: 2016-06-29
Filing date: 2016-06-29
Publication date: 2021-09-03
Anticipated expiration: 2036-06-29
Also published as: CN105944258A

Abstract

The invention relates to a fire-fighting facility, in particular to a stay cable tower end fire-fighting system. Comprises a spraying fire-extinguishing device and a control device; the spraying fire extinguishing device comprises a water tank fixed inside the cable tower; a water outlet pipe is arranged at the bottom of the water tank; the inlet end of the water outlet pipe is communicated with the water tank, and the outlet end of the water outlet pipe is provided with a water outlet header pipe; the outlet end of the main pipe is provided with a plurality of branch pipes communicated with the main pipe; the branch pipe is provided with a plurality of spray heads which are opposite to the anchoring points of the stay cable and the cable tower; the control device comprises a ball valve arranged on the main pipe and a control cabinet for controlling the opening and closing of the ball valve; the ball valve is electrically connected with the control cabinet. The invention carries out comprehensive and careful fire-fighting design on the anchoring area of the stay cable tower end, can effectively prevent fire from happening in the bridge construction process and in the later operation period, finishes the collection of smoke signals by utilizing the control cabinet, sends out a spraying instruction, automatically and timely extinguishes the fire, and prevents the fire from spreading to endanger the bridge safety.

Description

Stay cable tower end fire extinguishing system

Technical Field

The invention relates to a fire-fighting facility, in particular to a stay cable tower end fire-fighting system.

Background

The cable-stayed bridge is a common bridge structure in modern bridges and has a plurality of advantages. The upper end of a stay cable of the cable-stayed bridge is usually anchored on a cable tower, and a fixing structure is arranged in the cable tower to fix the stay cable, so that the weight of the bridge is stably transmitted to the cable tower. Generally, the interior of the cable tower and the stay cables are made of non-flammable materials, so that fire-fighting facilities are not installed in the current stay cable bridge structure. In practice, however, there is still a possibility of fire on the pylon. For example, No. 10 and 29 in 2014, chen bridge in hu south has a fire accident, the accident is caused by welding slag falling off by constructors inside the cable tower during construction, the temperature inside the cable tower is continuously increased due to fire in the cable tower, and finally four stay cables are blown out, so that serious economic loss is caused.

In fact, the pylon and the stay cable are easily corroded by fire due to the problems of structure and material, and once a fire breaks out, the stay cable anchorage device deforms and the clamping piece fails, so that the cable body slips, and the tragic events of bridge damage and casualties are caused. Therefore, it is necessary to add fire-fighting facilities to the stayed-cable bridge.

Disclosure of Invention

The invention aims to solve the defects of the background technology and provide a fire-fighting system at a stay cable tower end.

The technical scheme of the invention is as follows: the utility model provides a suspension cable tower end fire extinguishing system which characterized in that: comprises a spraying fire-extinguishing device and a control device; the spraying fire extinguishing device comprises a water tank fixed inside the cable tower; a water outlet pipe is arranged at the bottom of the water tank; the inlet end of the water outlet pipe is communicated with the water tank, and the outlet end of the water outlet pipe is provided with a water outlet header pipe; the outlet end of the main pipe is provided with a plurality of branch pipes communicated with the main pipe; the branch pipe is provided with a plurality of spray heads which are opposite to the anchoring points of the stay cable and the cable tower; the control device comprises a ball valve arranged on the main pipe and a control cabinet for controlling the opening and closing of the ball valve; the ball valve is electrically connected with the control cabinet.

The control device further comprises a smoke sensor fixed on the inner wall of the cable tower; the smoke sensor is electrically connected with the control cabinet.

Furthermore, the smoke sensor is provided with a plurality of smoke sensors, and each spray head is provided with a smoke sensor corresponding to the spray head.

Furthermore, a branch pipe valve is arranged between the inlet end of each spray head and the corresponding branch pipe outlet, and the branch pipe valves are electrically connected with the control cabinet.

A booster water pump is further arranged on the main pipe; the water pump is electrically connected with the control cabinet.

The device further comprises a pressure relief device; the pressure relief device comprises a pressure relief pipe and a pressure relief valve arranged on the pressure relief pipe, and the outlet end of the main pipe is communicated with the inlet end of the pressure relief pipe and the inlet ends of the branch pipes through a tee; the pressure release valve is electrically connected with the control cabinet.

The tower crane further comprises a plurality of layers of platforms which are fixed on the inner wall of the cable tower and used for maintenance, and the platforms are arranged in parallel at intervals.

The tower further comprises a fire-fighting crawling ladder fixed on the inner wall of the cable tower, and the crawling ladder is vertically arranged and connected with all platforms.

The invention carries out comprehensive and careful fire-fighting design on the anchoring area of the stay cable tower end, can effectively prevent fire from happening in the bridge construction process and in the later operation period, finishes the collection of smoke signals by utilizing the control cabinet, sends out a spraying instruction, automatically and timely extinguishes the fire, and prevents the fire from spreading to endanger the bridge safety.

Drawings

FIG. 1: the invention has a structure schematic diagram;

FIG. 2: the invention is a schematic pipeline structure;

wherein: 1-a water tank; 2, a water pump; 3-a tee joint; 4, a pressure relief valve; 5-ball valve; 6-a control cabinet; 7-a smoke sensor; 8-anchor points; 9-branch valve; 10-a spray head; 11-a platform; 12-climbing a ladder; 13-steel pipe; 14-asbestos cloth; 15-water outlet pipe; 16-header pipe; 17-branch pipe; 18-pressure relief pipe.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

Referring to fig. 1-2, a stay cable tower end fire-fighting system comprises a spraying fire-fighting device and a control device. As shown in fig. 1, a water tank 1 is arranged inside the cable tower, and the water tank is fixed at the top end inside the cable tower, so that water in the water tank 1 can flow out conveniently. The bottom of the water tank 1 is provided with a water outlet pipe 15, the inlet end of the water outlet pipe 15 is communicated with the water tank 1, the outlet end of the water outlet pipe 15 is provided with a water outlet main pipe 16, the outlet end of the main pipe 16 is provided with a plurality of branch pipes 17 communicated with the main pipe, as shown in fig. 1-2, the number of the branch pipes 17 is two, and the branch pipes are mainly arranged according to the distribution of the stay cables on the cable tower. The branch pipe 17 is provided with a plurality of spray heads 10 which are opposite to the stay cable and cable tower anchoring points 8, once a fire disaster occurs at the stay cable anchoring points 8, water can be sprayed from the spray heads 10 to extinguish the fire, and the stay cable anchoring points are prevented from being burnt. The branch pipe 17 is provided with a ball valve 5, and the spray head 10 can be controlled by controlling the opening and closing of the ball valve 5.

A branch pipe valve 9 is arranged between the inlet end of each spray head 10 and the outlet of the corresponding branch pipe 17, the branch pipe valve 9 is electrically connected with the control cabinet 6, each spray head 10 is independently controlled through the control cabinet 6, once a fire disaster condition occurs, water can be independently sprayed to the anchoring point 8 which is on fire for fire extinguishment, and the arrangement saves water and is more targeted.

In actual use, in order to increase the water flow sprayed by the spray head 10, the pressure boosting water pump 2 is arranged on the main pipe 16 in the embodiment, and the pressure boosting water pump 2 can increase the pressure of the water flow sprayed by the spray head 10, thereby being beneficial to fire fighting.

In order to facilitate the maintenance of the pipeline system, the pressure relief device is arranged on the main pipe 16, the pressure relief device comprises a pressure relief pipe 18 and a pressure relief valve 4 arranged on the pressure relief pipe 18, and the outlet end of the main pipe 16 is communicated with the inlet end of the pressure relief pipe 18 and the inlet end of the branch pipe 9 through a tee joint 3. Once the pipeline system has a fault problem, the water in the water tank 1 can be discharged through the pressure relief pipe 18 and the pressure relief valve 4, and the pipeline system is convenient to overhaul.

The valve and the water pump 2 of this embodiment are all controlled through controlling means, and the controlling means of this embodiment is including fixing the switch board 6 on the cable tower inner wall, and the same control valve of switch board 6, the opening of water pump 2 stops.

The control device also comprises a smoke sensor 7, the smoke sensor 7 is electrically connected with the control cabinet 6, and the smoke sensor 7 is fixed on the inner wall of the cable tower. Whether the anchor point 8 catches fire is automatically judged through the induction of the smoke sensor 7, and once the fire catches fire, the fire catching signal is transmitted to the control cabinet 6 immediately, the control cabinet 6 controls the water pump 2, the ball valve 5 and the branch pipe valve 9 to be opened to spray water to the anchor point 8 to complete fire extinguishing.

Because the anchoring points 8 in the cable tower are more, in order to ensure the accuracy of the smoke sensors 7, in the embodiment, each anchoring point 8 is provided with one smoke sensor 7, each spray head 10 is provided with one corresponding smoke sensor 7, and each smoke sensor 7 is electrically connected with the control cabinet 6. The smoke sensor 7 is located right above each anchoring point 8, once the anchoring points 8 generate smoke in case of fire, the temperature of the smoke is higher than the air temperature, so that the smoke is generated and then flows upwards, and the smoke sensor 7 is arranged right above the anchoring points 8 and can sense the generation of the smoke most quickly

In order to facilitate the overhaul of pipelines and circuit systems, the embodiment is provided with a plurality of overhaul platforms 11 inside the cable tower, the overhaul platforms 11 are arranged in parallel at intervals, and a ladder stand 12 is arranged between the platforms 11 for connection.

In addition, a circle of steel pipe 13 for protecting the stay cable is arranged on the stay cable outside the cable tower, as shown in fig. 1, the steel pipe 13 can effectively prevent internal fire from spreading to the outside, and prevent welding slag from falling on the stay cable to cause damage of the stay cable in the process of installing the stay cable.

The anchor point 8 is also provided with a layer of asbestos cloth 14 so as to block fire, prevent the parts on the anchor point 8 from being burnt by big fire and avoid the problem of stay cable fracture.

During the use, when the conflagration takes place, the fire behavior is sensed to smoke transducer 7 that corresponds on anchor point 8, with data transmission to switch board 6, switch board 6 immediately starts water pump 2, ball valve 5 and the branch pipe valve 9 that corresponds, and the water in the water tank 1 begins to enter into the water pipe, and the shower nozzle 10 that corresponds with this anchor point 8 begins to put out a fire to the fire of firing water spray, and the back that the conflagration disappears, switch board 6 control water pump 2, ball valve 5 and branch pipe valve 9 shut down, stop spraying water.

When the pressure relief needs to be maintained, the control cabinet 6 controls the pressure relief valve 4 to be opened, and after water in the water tank 1 flows out, the pipeline system begins to be maintained.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a suspension cable tower end fire extinguishing system which characterized in that: comprises a spraying fire-extinguishing device and a control device; the spraying fire extinguishing device comprises a water tank (1) fixed inside the cable tower; a water outlet pipe (15) is arranged at the bottom of the water tank (1); the inlet end of the water outlet pipe (15) is communicated with the water tank (1), and the outlet end of the water outlet pipe (15) is provided with a water outlet main pipe (16); the outlet end of the main pipe (16) is provided with a plurality of branch pipes (17) communicated with the main pipe; the branch pipe (17) is provided with a plurality of spray heads (10) which are opposite to the stay cable and the cable tower anchoring points (8); the control device comprises a ball valve (5) arranged on the main pipe (16) and a control cabinet (6) for controlling the opening and closing of the ball valve (5); the ball valve (5) is electrically connected with the control cabinet (6);

the control device also comprises a smoke sensor (7) fixed on the inner wall of the cable tower; the smoke sensor (7) is electrically connected with the control cabinet (6);

the number of the smoke sensors (7) is multiple, and each spray head (10) is provided with one smoke sensor (7) corresponding to the spray head;

a branch pipe valve (9) is arranged between the inlet end of each spray head (10) and the outlet of the corresponding branch pipe (17), and the branch pipe valve (9) is electrically connected with the control cabinet (6).

2. The stay cable tower end fire extinguishing system according to claim 1, wherein: the main pipe (16) is provided with a booster water pump (2); the water pump (2) is electrically connected with the control cabinet (6).

3. The stay cable tower end fire extinguishing system according to claim 1, wherein: the pressure relief device is also included; the pressure relief device comprises a pressure relief pipe (18) and a pressure relief valve (4) arranged on the pressure relief pipe (18), wherein the outlet end of the main pipe (16) is communicated with the inlet end of the pressure relief pipe (18) and the inlet ends of the branch pipes (17) through a tee joint (3); the pressure release valve (4) is electrically connected with the control cabinet (6).

4. The stay cable tower end fire extinguishing system according to claim 1, wherein: the cable tower further comprises a plurality of layers of platforms (11) which are fixed on the inner wall of the cable tower and used for maintenance, and the platforms (11) are arranged in parallel at intervals.

5. The stay cable tower end fire extinguishing system according to claim 1, wherein: the tower crane further comprises a fire-fighting ladder (12) fixed on the inner wall of the cable tower, and the ladder (12) is vertically arranged and connected with all the platforms (11).