The TGHCE-2 geosynthetic longitudinal water throughput tester is suitable for various types of drainage belts and drainage belts (boards).

Longitudinal water flow tester for geosynthetic plastic drainage strips

Model:TGHCE-2

  I. Product Introduction: 

The TGHCE-2 geosynthetic longitudinal water throughput tester is developed and manufactured by Hebei Tianqixingzi Inspection Equipment Co.,Ltd., based on the national industry standard JTG E50-2006 "Test Procedures for Geosynthetics in Highway Engineering" and T1143-2006 "Test of Compressive Yield Strength and Water Flow of Plastic Drainage Belt Core". It also conforms to ISO 12958-1:2020, ISO 12958-2:2020, ASTM D4716/D4716M-22 standards and is suitable for export.

 II. Structural Description:

1. This product consists of: a working container, an overflow balance tank, a pressure pump tank inside the left-side door, a pressure control smart meter, a pressurizing copper pipe, a pressure sensor, a pressurizing pump, a pressure gauge, a drain pipe, an inlet balance tank, a water delivery pipe, a time control smart meter, a water inlet, a water delivery overflow tank, a water level display, a drain outlet, and a water delivery pump.

2. Plastic drainage belt (plate) flow rate tester (see figure). It is made of stainless steel and consists of eight main components: a working container, a pressurizing container, an overflow balance tank, an inlet balance tank, an inlet pressure tank, a water delivery overflow tank, an electric pressurizing pump, and an electric water delivery pump.

3. The working container is welded from a φ130mm, 2mm thick stainless steel cylinder to a φ200mm, 10mm thick flange, with an effective length of 40cm. An elliptical hole with a diameter of 120mm × 15mm is opened in the center of the flange, and a perforated stainless steel support tray is installed flush with the bottom edge of the hole. The working container is equipped with a pressure gauge, a drain outlet (with a valve), a pressure inlet (with a control valve), a water inlet (with a valve), and an overflow outlet (with a valve).

4. The inlet balancing tank is 30cm high and is welded to the flange as a whole via a 150mm × 40mm horizontal connecting section. The flange opening is consistent with the flange of the pressure vessel. An inlet is installed at a height of 10cm in the tank. A 25cm high overflow sill (based on the bottom of the tank) is installed inside the tank, and overflow outlet 1 is installed on the outside of the inlet balancing tank.

5. The overflow balancing tank is 7cm high and is welded to the flange as a whole via a 150mm × 40mm horizontal connecting section. The flange opening is consistent with the flange of the pressure vessel. A 5cm high overflow sill (based on the bottom of the tank) is installed inside the tank, and overflow outlet 2 is installed on the outside of the overflow balancing tank.

III. Product Information:

Plastic drainage belts (boards), also known as geopolymer drainage belts or plastic boards, are a commonly used strip-shaped drainage material. Their cross-sectional width is approximately 10cm, and their thickness is approximately 5mm. Their quality indicators mainly include the tensile strength of the composite and filter membrane, and the longitudinal water flow rate, conforming to standards JTS-206-1-2009 Waterway Engineering Plastic Drainage Belts (Boards), JTGESO-2006 Highway Engineering Geosynthetics, and S1235-2012 Geosynthetics.

This product was developed and manufactured by our factory at the request of the National Building Materials Bureau Quality Inspection Center. Operational tests conducted by the quality inspection center have proven that the design is reasonable and all indicators meet the design requirements. It is a specialized testing instrument for testing the longitudinal water flow rate of plastic drainage belts (boards).

IV. Product Specifications:

1. Specimen Size: 100mm × 450mm

2. Power Supply Voltage: 380V

3. Weight: 220Kg

4. Overall Dimensions: 1040×660×1300mm

V. Working Principle:

Water from the overflow tank is pumped into the working container by a water pump, filling the container with water. Then, a pressurizing pump is started to pressurize the pressurizing container. The water pressure is controlled by a pressure control smart meter, and the pressurizing container then transmits the pressure to the working container to balance the pressure.

VI. Installation Guide:

1. Sample Installation

Cut the sample into approximately 48cm lengths. Remove 1cm of filter membrane from each end. Chamfer the four corners of the sample at a 45° angle and carefully insert it into the tubular latex membrane.

Feed the drainage belt (plate) along with the latex membrane into the working container through the orifice. Push it out along the support plate from the other orifice, ensuring approximately 4cm of the exposed length at both ends of the flange.

Use rubber gaskets to cover the exposed portion of the drainage belt (plate), ensuring the gaskets are tightly fitted to the outside of the flange. Flip the latex membrane over the rubber gaskets. Cover the remaining exposed portion of the drainage belt (plate) with two more rubber gaskets, clamping the flipped portion of the latex membrane between the rubber gaskets. The filter membrane of the drainage belt (plate) should extend beyond the rubber gaskets.

Secure the inlet balance tank and overflow balance tank to the working container using four screws, tightening them evenly.

2. Water Supply: Open the water pump and inlet valve 3 to fill the water balance tank with water through the inlet, allowing water to flow out of the overflow outlet 2 of the overflow balance tank for a period of time to expel air from the drainage belt (plate) and fully wet the filter membrane. Then close inlet valve 3.

3. Pressurization

Open the drain and inlet valves of the working container, turn on the water pump switch, and let water in through the inlet until water flows out of the drain. Then close the inlet and drain valves and turn on the pressurization pump switch. Pressurize to the required pressure and it will automatically stop.

Due to deformation of the drainage belt (plate), the pressure will drop. Pressurize as needed until the pressure stabilizes. The time required for this process depends on the strength of the core belt and filter membrane of the drainage belt (plate), and generally takes 0.5 to 2 hours.

4. Water Flow Test

Open the inlet to allow water to drain from overflow outlets 1 and 2. At this point, the water level difference between the two ends of the drainage belt (plate) should be exactly 20 cm, with a hydraulic gradient of 0.5. Check if the pressure is 350 kPa. After everything meets the requirements, use a measuring cylinder to measure the water flow at overflow outlet 2 and measure the water temperature. The water flow rate was measured repeatedly after 6 hours. When the relative error between the two measurements was less than 2%, the latter water flow rate was taken as the test value for that drainage strip (board).

Two drainage strips (boards) were tested in each group, and the average value of the two measurements was taken as the water flow rate of that group.

VII. Installation Requirements:

The power input is a three-phase four-wire system. The green wire is the ground wire, and the other three can be connected arbitrarily.

VIII. Quality Assurance:

1. All products sold by our factory are covered by a one-year warranty, with free on-site repair during the warranty period (excluding malfunctions or damage caused by human factors or force majeure).

2. Users can consult technical issues through the after-sales hotline and obtain clear solutions.

3. In the event of performance failure during normal use, our company promises the above warranty service. In addition, if applicable national laws and regulations stipulate otherwise, our company will comply with the relevant laws and regulations.

4. During the warranty period, the following situations will be subject to paid repair services:

(1) Damage caused by human factors or force majeure;

(2) Malfunctions or damage caused by improper operation;

(3) Malfunctions or damage caused by modification, disassembly, or assembly of the product;

(4) Failure to return the "After-Sales Service Commitment" on this page within one month.