Binzhou heavy well cover Xinglong heavy well cover Jiyang heavy well cover

Well cover level sign setting occasions: green land, corridor, bicycle lane or sidewalk where light q motor vehicles are prohibited to enter, roads or parking sites where ordinary p-type vehicles of grade 10 and below pass, roads or parking sites where heavy z motor vehicles pass, well covers are used to cover the defense of roads or deep wells in homes, to prevent people or things from falling.

The manhole cover is generally divided into round and square. In terms of urban road administration, the round manhole cover is generally used because it is not easy to tilt, which can better protect the safety of pedestrians and vehicles. The round manhole cover is mainly used because the length of each diameter of the round manhole cover passing through its center is the same, so if the manhole cover is rolled up by passing vehicles, Because no matter how it is rolled, its diameter will be slightly wider than the hole below, and the well cover will not fall into the well head.

1. Two sets of manhole covers are randomly selected from each batch for bearing capacity test. If one set fails to meet the requirements, another 2 sets shall be selected. If another set fails to meet the requirements, this batch of well covers is unqualified.

2. Adjust the position of the manhole cover so that its geometric center coincides with the load center, load at the speed of 1-3 kn/s, load to 2/3 of the test load, and then unload. This process is repeated for 5 times. The difference between the deformation before loading and the deformation after the fifth loading is the residual deformation. Then load to the test load at the same speed as above, and unload 5 minutes later. There shall be no cracks on the manhole cover and support.

1. Press gb/t? After the test required by 9341, the average value of bending strength is * * * 22mpa, and the small value of single piece is * * 18mpa.

2. Press gb/t? After the 1043 test, the average value of impact strength is * * * 104kj/m2, and the small value of single piece is * * * 6 × 103kj/m2.

3. Press gb/t? After the 1041 test, the average value of compression strength is * * * 25mpa, and the small value of single piece is * * * 20mpa.

4. Press gb/t? After the 1040 test, the average value of tensile strength is * * * 10mpa, and the small value of single piece is * * * 8mpa.

5. Press gb/t? After the test required by 9341, the average value of elastic modulus is * * * 1000 mpa, and the small value of single piece is * * * 600 mpa.

6. Press gb/t? 8810, water absorption<1%.

7. Soak the composite well cover specimen in 20% - solution for 48h, and there is no obvious corrosion on the surface, and the loss of the composite well cover specimen is less than 1%.

8. Carry out temperature resistance test, and the relative change rate of strength of composite well cover is ≤ 5%.

The spheroidal graphite microstructure of nodular graphite well cover and cast iron well cover is better than that of gray iron well cover in reducing vibration capacity, which is beneficial to

Reduced stress caused by vibration. An important reason for choosing ductile and cast iron well covers is their low cost. This makes its application

Higher rate, low casting cost, convenient transportation and other characteristics.

Features of nodular graphite well cover and cast iron well cover:

1. Toughness. The impact value is detailed with that of medium carbon steel, more than 10 times that of gray iron material. This is the main reason why nodular graphite manhole covers and cast iron manhole covers are widely used in trunk roads.

2. Strength. The tensile strength ó b * * * 420mpa and the yield strength ó s * * * 300mpa are the same as low-carbon steel and three times of gray iron materials. The price of iron makes steel.

3. Good plasticity. The elongation is * * * 7%, which is similar to that of high carbon steel, while the elongation of gray iron material is zero. Production cost - lower than other steels

4. Strong shock resistance and corrosion resistance. In the water spray corrosion test, the corrosion amount in 90 days is only 1/40 of the gray cast iron well cover and 1/10 of the gray nodular graphite well cover. The service life is multiple

It is twice as large as the combined well cover and cement well cover, and five times as large as the ordinary gray iron well cover.

Ductile iron manhole covers are mainly made of ductile iron, and the quality of such manhole covers is related to the spheroidization rate. The commonly used coating for processing castings is antirust asphalt paint. Of course, the surface of nodular cast iron manhole cover is also treated by spraying antirust asphalt paint. Ductile iron manhole covers have one advantage, that is, because of the high strength and toughness of ductile iron, they are about 30% lighter than the same type of gray iron manhole covers.

Jinan Xinglong Well Cover Co., Ltd. is mainly engaged in well covers, rainwater buckets, rainwater grates, ladders and other products. If necessary, you are welcome to consult.

The distribution of ductile iron manhole covers, cast iron gutter covers, flexible cast iron pipe fittings, 87 type cast iron rain buckets, 87 type side drain rain buckets, siphon drain buckets, ventilation caps, claw head vent tubes, trowel chassis, trowel plates and smears by Jinan Xinglong Well Cover Co., Ltd. are complete in variety and reasonable in price. Jinan Xinglong Well Cover Co., Ltd. has won the majority of customers with its strength of -, respect for -, abide by contracts, - products, and the principle of multi variety business characteristics and -.

Nodular well cover is a kind of commodity of nodular cast iron. Nodular cast iron loses spherical graphite after spheroidizing and inoculation, which effectively improves the machine function of cast iron. It improves plasticity and toughness, thus losing higher strength than carbon steel. Ductile iron is a kind of high-strength cast iron material developed in the 1950s. Its comprehensive function is close to that of steel. It is precisely because of its excellent function that it has been successfully used to cast some parts with complex stress and high requirements for strength, toughness and wear resistance. Ductile iron has been rapidly developed, which is second only to gray iron and is widely used. The so-called "replacing steel with iron" mainly refers to nodular cast iron.

Features of cast iron manhole cover:

Good toughness. The impact value is detailed with that of medium carbon steel, more than 10 times of that of gray iron.

Strong corrosion resistance. In the water spray corrosion test, the corrosion amount in 90 days is only - 1/40 of the steel pipe and 1/10 of the gray iron pipe. The service life is twice that of gray iron pipe and five times that of ordinary steel pipe.

Good plasticity. The elongation * * * 7% is similar to that of high carbon steel, while the elongation of gray iron data is zero.

High strength. The tensile strength ó b * * * 420mpa, the yield strength ó s * * * 300mpa, in contrast to low-carbon steel, is three times the gray iron data.

Due to the spherical graphite microstructure of nodular cast iron, nodular cast iron is better than cast steel in weakening vibration ability, which is more conducive to reducing stress. An important reason for choosing nodular cast iron is that the cost of nodular cast iron is lower than that of steel casting. The low cost of nodular cast iron makes this material more popular, with higher casting efficiency and less machining cost of nodular cast iron.

Weight table of cast iron manhole cover Cast iron well cover and support Manhole cover mold processing Stainless steel manhole cover atlas Atlas of manhole cover plate Fabrication of cement well cover Cement well cover mold manufacturer Steel mould for cement well cover Compound well cover production equipment Load bearing standard of nodular cast iron manhole cover Ductile iron manhole cover- Thickness of nodular cast iron manhole cover Inspection well cover size Dimension of ductile iron manhole cover

Ductile iron manhole cover atlas Atlas of composite well cover