Meishan concrete drilling and coring machine

The HZ-20 concrete drilling and coring machine is produced and provided by Hebei Zhongkoda Instrument Co., Ltd. It is one of the HZ series diamond engineering drilling machines, also known as highway drilling machine and concrete drilling machine. It is powered by a gasoline engine, has fast starting and reliable operation, and is suitable for engineering drilling in places without electricity and larger diameters. MeishanConcrete drilling and coring machine
1、 Main purpose:
The 20 type engineering drilling rig adopts high-speed cutting technology and is matched with thin-walled diamond drill bits. It is widely used in drilling and coring in fields such as engineering construction, municipal engineering, equipment installation engineering, and building quality inspection. MeishanConcrete drilling and coring machine
1. Core samples are taken from concrete, asphalt pavement, limestone foundations such as highways, airports, ports, and dams for compressive and flexural tests.
2. Install large machinery and equipment by drilling anchor bolt holes. MeishanConcrete drilling and coring machine
3. Drilling holes for installing bridge handrails and traffic safety guardrails
2、 Main features:
1. Adopting a double column structure and spiral feeding method, it has good stability and simple and labor-saving operation. Equipped with wheels for easy movement.
2. By using high-speed cutting technology and thin-walled diamond drill bits, high-strength reinforced concrete can be drilled and cut with high drilling efficiency, accurate hole position, smooth hole wall, good hole quality, complete and smooth core sample, low vibration, and no damage to buildings.
3、 Main technical parameters:
1. Maximum drilling diameter: 200mm
2. Maximum drilling depth: 700mm
3. Output speed: 800-1200 revolutions per minute
4. Power: 5.5 horsepower, 9.0 horsepower, and 13 horsepower (Honda gasoline engine)
5、 机器重量： 140kg 180kg 190kg
6. Dimensions: 1080 × 780 × 1150mm, 1200 × 800 × 1300mm
4、 Operation process:
1. Preparation before use
(1) Add 93 # unleaded gasoline and premium lubricating oil, and the amount of engine oil added can be based on the scale on the dipstick.
(2) Add lubricating oil to the column and rotate the feed handle and output shaft to check whether the feed and rotation are flexible and reliable.
(3) Prepare the water source.
(4) Check if the screws in each part are loose.
2. Installation
After the drill bit is aligned with the hole position, lift the three walking wheels and let the base land on the ground. When drilling small holes and the concrete strength is not high, the drilling rig can be fixed by its own weight. If the drilling hole is too large and the weight of the drilling rig cannot stabilize it, heavy objects (such as sandbags, iron blocks, concrete blocks, etc.) can be placed on the chassis to fix it or two expansion bolts and pressure rods (such as channel steel, etc.) can be used to fix the drilling rig. The drilling rig should be firmly fixed and not shaken, otherwise the drilling operation cannot be carried out normally.
3. Open hole
After completing the above tasks, you can start the drilling operation, install the drill bit, and start the gasoline engine (see the gasoline engine user manual for details). Place the water inlet pipe into the water bucket, which should be raised above the water pump position. Then hold the air pump with your hand to suck water into the water pump. After filling the water pump with water, place the water bucket on the ground. Adjust the throttle to the maximum and start gently shaking the handle to slowly bring the drill bit into contact with the ground. The key to drilling: feed water first and then drill, with a slow feed speed and low drilling pressure. It is strictly prohibited to work without water to avoid burning the drill bit and water seal.
4. Normal drilling in
After drilling to a depth of 2-3 millimeters, normal drilling can be resumed. At this time, the feeding pressure should be appropriately increased. The key to normal drilling is to maintain moderate and even feeding pressure, and to reduce the feeding pressure when encountering coarse steel bars. To achieve the goal of listening and watching, listen to the sound of the machine to see if it is normal, and check if there is water flowing back (out) from the hole.
5. Final hole
After reaching the desired depth, the drilling can be stopped. The requirement for stopping drilling is to first turn off the machine and then turn off the water. If it is a deep hole, it is not possible to immediately lift the drill and stop the water supply. Instead, it is necessary to punch the hole with water for a period of time in order to wash away the rock powder inside the hole, in order to prevent the rock powder from settling and burying the drill, which may cause difficulties in core extraction.
5、 Precautions
1. When there is a stuck drill, it is not allowed to use the method of forcibly starting the machine to eliminate the stuck drill. Instead, manual methods (such as using an extended hand to rotate the drill bit) should be used to eliminate it before restarting the machine.
2. When the rock core gets stuck in the drill bit, drilling should be stopped immediately and cleared in a timely manner. When clearing, only gently tap the steel body of the drill bit with a rubber hammer or cork stick, and repeatedly tap to remove the rock core. It is strictly prohibited to use a hammer to strike the drill bit or rock core, and it is strictly prohibited to insert an iron rod from the back of the drill bit to strike the rock core, in order to avoid damaging the thin-walled drill bit.
3. Before use, carefully read the gasoline engine user manual
4. It is strictly prohibited to work without water.
6、 Repair and maintenance
1. After the core extraction is completed, the appropriate parts should be wiped clean, dried, and oiled.
2. Professional personnel should be responsible for the use and maintenance of the machine to maintain its normal operation.
3. Regularly check gasoline and engine oil to prevent short oil from causing damage to the machine and affecting its lifespan.
4. After prolonged or repeated use of the machine, it is necessary to check whether the bolts in each part are loose to prevent any impact or delay in normal use.
5. If the machine is not used for a long time, the gasoline in the carburetor should be drained to prevent the carburetor from being soaked for too long and difficult to start next time.

7、 Common faults and troubleshooting
Faulty gasoline engine emitting smoke
Reason 1: Excessive engine oil 2. Engine oil entering the combustion chamber
Exclusion methods: 1. Extract some engine oil. 2. Remove the spark plug, then pull the starting handle to drain the engine oil. After inserting the spark plug, start the gasoline engine to idle until normal.

The faulty gasoline engine lacks power
Reason 1: The gasoline grade is less than 2. The choke valve is closed
Exclusion method 1: Replace with gasoline of the designated grade. 2. Rotate the governor back and open the choke valve.

The faulty gasoline engine is difficult to start
Reason 1: Excessive carbon buildup on the spark plug 2. The spark plug is too old 3. The choke valve is not closed (when cooling is turned on)
Exclusion methods: 1. Clean the spark plug. 2. Replace the spark plug with a new one. 3. Close the air blocking valve

Slow core removal due to malfunction
Reason 1: Blunt drill bit 2. Aging belt 3. Loose belt 4. Slow rotation speed
Exclusion methods: 1. Replace the drill bit with a new one. 2. Replace the standard angle band with a new one. 3. Adjust the tightening bolt of the band. 4. Adjust the throttle to the high-speed position