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来源：http://www.cx-fire.com/ 日期：2026-03-05
水力警铃的学名叫水力机械报警器，它是湿式报警阀组的重要组件，在湿式报警阀动作后，由阀信号口流出的水，使水力警铃驱动，并发出连续声响，以示报警。水力警铃技术性能根据国家标准水力警铃应具备以下性能:1、水力警铃进水口镀锌钢管公称直径为20mm时，排水孔面积不应小于喷嘴面积的50倍。2、水力警铃喷嘴直径不应小于3mm，过滤网孔尺寸不应大于喷嘴直径的0.6倍，过滤网总面积不应小于喷嘴面积的10倍，喷嘴和过滤网应采用耐腐蚀材料。3、水力警铃的铃锤开始旋转时，喷嘴进口处压力应大于0.035MPa。4、水力警铃不进行调整和润滑即能保证在规定的试验条件下，准确而持续地工作。5、水力警铃喷嘴进口处压力分别为0.2MPa、0.3MPa、、1.0MPa，距离水力警铃3m处，警铃声强度不应低于70db。8、水力警铃与报警阀的连接应采用镀锌钢管，当镀锌钢管的公称直径为20mm时，其长度不宜大于20米。9、水力警铃应安装在公共通道或值班室附近的外墙上。水力警铃功能特点水力警铃是由水流驱动发出声响的报警装置，通常作为自动喷水灭火系统的报警阀配套组件，水力警铃由铃壳、铃锤、转动轴、叶轮及输水管等组成。
The scientific name of hydraulic alarm bell is hydraulic mechanical alarm, which is an important component of wet alarm valve group. After the wet alarm valve is activated, the water flowing out from the valve signal port drives the hydraulic alarm bell and emits continuous sound to indicate the alarm. According to national standards, hydraulic alarm bells should have the following performance: 1. When the nominal diameter of the galvanized steel pipe at the inlet of the hydraulic alarm bell is 20mm, the drainage hole area should not be less than 50 times the nozzle area. 2. The diameter of the hydraulic alarm nozzle should not be less than 3mm, the size of the filter mesh should not be greater than 0.6 times the diameter of the nozzle, the total area of the filter screen should not be less than 10 times the area of the nozzle, and the nozzle and filter screen should be made of corrosion-resistant materials. 3. When the hammer of the hydraulic alarm bell starts to rotate, the pressure at the nozzle inlet should be greater than 0.035MPa. 4. The hydraulic alarm bell can operate accurately and continuously under the specified test conditions without adjustment or lubrication. 5. The pressure at the inlet of the hydraulic alarm bell nozzle is 0.2MPa, 0.3MPa, and 1.0MPa respectively. At a distance of 3m from the hydraulic alarm bell, the intensity of the alarm bell should not be less than 70db. 8. The connection between the hydraulic alarm bell and the alarm valve should be made of galvanized steel pipe. When the nominal diameter of the galvanized steel pipe is 20mm, its length should not be greater than 20 meters. 9. Hydraulic alarm bells should be installed on the exterior walls near public passages or duty rooms. The functional characteristics of a hydraulic alarm bell are that it is an alarm device driven by water flow to produce sound. It is usually used as a matching component for the alarm valve of an automatic sprinkler fire extinguishing system. The hydraulic alarm bell consists of a bell shell, a bell hammer, a rotating shaft, an impeller, and a water supply pipe.
当自动喷水灭火系统的任一喷头动作或试验阀开启，系统报警阀自动打开，有一小股水通过信号口输水管道，进入水轮机构冲击叶轮转动，带动铃锤敲击铃壳，发出连续不断的报警声响。
When any nozzle of the automatic sprinkler fire extinguishing system is activated or the test valve is opened, the system alarm valve automatically opens. A small stream of water enters the water turbine mechanism through the signal port water supply pipeline, impacts the impeller rotation, drives the bell hammer to strike the bell shell, and emits a continuous alarm sound.
叶轮：叶轮腔是动力源，在一个封闭的盒中有一个叶轮，一个进水口，一个出水口，由延迟器流来的水经过叶轮盒的进水管和进水管的喷嘴以射流的形式冲击叶轮片，使叶轮片飞速转动，带动传动轴转动，从而使传动轴端部的铃锤连杆也转动。由于离心力的作用，连杆上的铃锤不断敲击铃壳，从而发出铃声。传动轴可按墙的厚度调节其长短。叶轮盒安装在室内，而铃则可以方便地安装在墙的另一面。水力警铃的工作状态与叶轮盒进出水管的布置有一定关系。必须让叶轮最大限度地受到喷射流的冲击，因此射流方向应是叶轮转动的切线方向，另外，叶轮转动时应不受背压的影响。以此两条来判断叶轮进出水口的布置，就可以知其优劣。
Impeller: The impeller chamber is the power source. There is an impeller, an inlet, and an outlet in a closed box. The water flowing from the delay device passes through the inlet pipe of the impeller box and the nozzle of the inlet pipe to impact the impeller blades in the form of a jet, causing the impeller blades to rotate rapidly and drive the transmission shaft to rotate, thereby causing the bell hammer connecting rod at the end of the transmission shaft to also rotate. Due to the centrifugal force, the bell hammer on the connecting rod continuously strikes the bell shell, thereby emitting a bell sound. The length of the transmission shaft can be adjusted according to the thickness of the wall. The impeller box is installed indoors, while the bell can be conveniently installed on the other side of the wall. The working status of the hydraulic alarm bell is related to the arrangement of the inlet and outlet pipes of the impeller box. It is necessary to maximize the impact of the jet on the impeller, so the jet direction should be the tangential direction of the impeller rotation. In addition, the impeller rotation should not be affected by back pressure. By using these two criteria to determine the layout of the impeller inlet and outlet, one can determine its advantages and disadvantages.
叶轮进出水口布置形式：从上图可以看出其中右进水口、左进水口两种形式的叶轮布置形式较好，喷嘴射流与叶轮片成切线布置，任何情况下都能冲动叶轮，切叶轮也不受背压，转动力矩也大。
Arrangement form of impeller inlet and outlet: From the above figure, it can be seen that the two forms of impeller arrangement, the right inlet and the left inlet, are better. The nozzle jet is arranged in a tangent line with the impeller blade, which can impulse the impeller in any situation and cut the impeller without back pressure, and the rotational torque is also large.
而下进水口的两种形式，由于出水口一个在左、一个在右，出水在上方，叶轮侵泡在水中，叶轮转动时，承受背压，喷嘴的射流不是经过空气射击在叶片上，而是先通过水再射击在叶片上，其推动叶片转动的作用能力已大大减小，在施工时经常发现水力警铃响应时间不够，就是这个原因造成的。
The two forms of lower inlet, due to one outlet on the left and one on the right, with the water outlet above, the impeller is immersed in the water. When the impeller rotates, it bears back pressure, and the jet from the nozzle does not pass through the air and shoot on the blades, but first passes through the water and then shoots on the blades. Its ability to push the blades to rotate has been greatly reduced. During construction, it is often found that the response time of the hydraulic alarm bell is insufficient, which is the reason for this.
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