产品介绍

Product Introduction

1. Product Introduction

NJ-2T/3T/5T anchorage force tester (anchor rod tensile tester) is a portable tensile testing instrument developed and produced by Beijing Naijiu Weiye Technology Co., Ltd. This instrument is suitable for detecting the anchoring force of anchor rods, planting bars, anchor bolts, and other anchor solids. It is one of the commonly used instruments for quality inspection of anchor rod and anchor bolt construction support engineering.

The anchorage force tester/anchor rod pulling instrument is composed of manual pumps, hydraulic cylinders, digital pressure gauges, and high-pressure rubber hoses. The pump body is made of precision cast steel, with a long service life. The hydraulic cylinder is a hollow self resetting type, and the NJ series hollow oil cylinder is equipped with a handle and can be connected to a high-pressure hose through a quick connector. The digital pressure gauge reading is intuitive and can directly read the anchor rod tension (kn) value. This series of tension gauges has a compact structure, convenient carrying, small size, and light weight.

The manual pump of the tension gauge can also be used as a power source for universal low flow high-pressure oil.

2. Operational principle

The working principle of the anchor rod tension meter (pull-out instrument) is: when the central hole of the jack covers the tested rod, select a suitable fixture to clamp the part of the tested rod that exposes the central hole; Under the action of the hydraulic pressure of the pressure pump, the oil pressure is transmitted to the jack cylinder body through the oil pipe, and the piston rod moves outward against the specialized clamp; The pressure directly acts on the outer shell of the anchor and is then transmitted to the clamp. After being subjected to force, the clamp clamps the tested rod tightly, ultimately causing the rod to experience outward pulling force; At this point, the pressure gauge on the pressure pump displays the corresponding force (kN) value, which reflects the magnitude of the pulling force on the tested rod.

If the above rods are steel bars, the magnitude of the anchoring force on the steel bars can be measured. After completing the inspection, the puller needs to manually shake and vibrate the anchor with minimal force to easily remove the puller jack.

3. Technical parameter: