Indoor fire hydrant pressure loss, decompression and stable pressure test apparatus

1. Scope of application

1.1 It is suitable for indoor fire hydrants with nominal diameters of 25mm, 50mm, and 65mm, nominal pressure of 1.6Mpa, and medium of water and foam mixture. Among them, the indoor fire hydrant with a nominal diameter of 65mm is the standard configuration, and our company will provide corresponding accessories at random. If you need to test other specifications of indoor fire hydrants, you need to purchase additional accessories of corresponding specifications from our company.

1.2 Applicable to Section 5.12 of GB 3445-2018 "Indoor Fire Hydrant", under the condition of inlet flow rate of 5m/s, the pressure loss due to hydraulic friction shall not exceed 0.02Mpa;

1.3 Applicable to the test of decompression type indoor fire hydrant in section 5.13 of GB 3445-2018 "Indoor Fire Hydrant", the allowable error of the inlet pressure and outlet pressure is ±0.02Mpa, and the flow rate should be greater than 5.0L/s;

1.4 It needs to be used in conjunction with our company's "HX2558 large flow and high pressure water supply system".

2. Compliant standards:

2.1 Compliance with the standards GB 3445-2018 Section 5.12 and Section 6.12;

2.2 Compliance with the standards GB 3445-2018 Section 5.13, Section 6.13 Decompression, decompression and pressure stabilization performance and flow test.

3. Software control system

3.1 The software control system is integrated with the ZY6558 high-flow and high-pressure water supply system, and the ZY6558 software control system is shared. It is no longer necessary to set up a separate software control system, which greatly reduces the cost of the purchaser.

3.2 The software control system adopts the WINDOWS system as the working platform, and uses the Labview software of the American NI company to compile the software system, which can control the pressure, flow and other test processes on the computer interface, and can automatically control, display and record pressure, flow, time and other parameters;

3.3 The software control system automatically collects test data, automatically generates original records, and automatically generates formatted reports, without the need for manual input of data by experimenters, which reduces the workload of experimenters and is easy to operate;

3.4 Data acquisition time of software control system: timing accuracy 0.1s; data transmission records are timely and accurate, without transmission delay or lag;

3.5 The software control system meets the different flow requirements of various products, and the flow/pressure regulation can be controlled automatically;

4. Main features

4.1 The design is strictly in accordance with international standards, and the positions of flow meters and pressure gauges are designed according to the standards.

4.2 The software control system automatically collects test data, automatically generates original records, and automatically generates formatted reports. It does not require manual data input by experimenters, reduces the workload of experimenters, and is easy to operate.

4.3 Use flowmeters, pressure gauges, differential pressure transmitters, pressure gauges with output functions, etc., to directly transmit relevant data to the software control system, eliminating the trouble of manual copying of data.

4.4 With casters, it can be moved at will, which is convenient for position adjustment.

Five, the main technical parameters:

3.1 Instrument composition: It consists of a stop valve, a throttle valve, a flow meter, a pressure gauge before the plug, a differential pressure transmitter, a pressure gauge behind the plug, a fire nozzle with an equivalent nozzle diameter of 19mm, and pipelines;

3.2 Globe valve: DN65mm, pressure 6.4Mpa;

3.3 Throttle valve: DN25mm, pressure 1.6Mpa

3.4 Flow meter:

3.4.1 Using turbine flowmeter

3.4.2 Specification: DN65 caliber;

3.4.3 Connection method: use flange connection;

3.4.4 Material: 304 stainless steel;

3.4.5 Power supply/output: DC24V power supply, pulse output;

3.4.6 Accuracy: 0.5 grade;

3.4.7 Pressure resistance: 6.3Mpa;

3.4.8 Flow range: 4-18m³/h;

3.4.9 Medium: water.

3.5 front and rear pressure gauges: 0~5.0Mpa

3.6 Differential pressure transmitter:

3.6.1 Signal output: current 4~20mA

3.6.2 Interface: threaded interface M20*1.5

3.6.3 Pressure range: 0~30kpa.

3.6.4 is the electronic direct reading type

6. Environmental requirements for equipment installation

6.1 Equipment size: length, width, height L4250xW2560xH1200mm

6.2 Power requirements: DC24V power supply or lithium battery;

6.3 Water source requirements: see the requirements of ZY6558;

6.6 Atmospheric pressure: no requirement;

6.7 Humidity requirements: None Requirements:

6.8 Temperature requirements: above 5 degrees. Note that under low temperature conditions, there should be no water in the pipelines of all fire-fighting equipment to prevent freezing and cracking equipment.