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Advantages, classification and details of Sichuan Ductile Iron Manhole Covers

编辑:123木头人 时间:2017-03-26 Source: Unknown Editor: 123 Woodman Time: 2017-03-26
Advantages, classification and details of Sichuan Ductile Iron Manhole Covers

Cast iron manhole covers on the market are now divided into: ductile iron manhole covers and gray iron manhole covers. Generally speaking, nodular cast iron manhole covers of the same weight are more resistant to compression and lighter than grey iron manhole covers. Gray cast iron manhole cover is generally made of HT200, ductile manhole cover is generally made of QT500-7. The products are round, square, anti-theft, open, cast iron rain rafter, tree grate, cable cover, gutter cover. We The company will strictly customize according to customer needs. As for transportation, we will distribute the products to the customer's designated place, and the company guarantees the product quality. If necessary, you can come to our company to inspect and cooperate. We will provide a full range of services.
Advantages, classification and details of Sichuan Ductile Iron Manhole Covers
Advantages, classification and details of Sichuan Ductile Iron Manhole Covers

Advantages of nodular cast iron manhole cover:

1. Anti-vibration: By setting a U-shaped groove at the stop of the well ring, using a T-shaped synthetic rubber strip, embedded in the U-shaped groove, in the process of the contact between the well cover and the well ring, to play a buffer role and reduce the vibration force .

2. Anti-sounding: The contact occlusal surface between the well cover and the well ring directly acts on the T-shaped rubber strip to soften the noise to eliminate noise.

3. Anti-theft: a square groove is protruded on the outer ring of the manhole cover, and the open ring at the inner wall end of the manhole cover is connected to the manhole cover through the fixed shaft of the manhole, and the inner wall of the other end is fixed with a pin body to play the role of anti-theft. When the manhole cover is opened and placed 90 The cover can be removed when the temperature is high, which is convenient for construction. Concealed lock adopts nylon bushing, never rust, and equipped with special tools to open, safe and reliable.

4. Anti-slip: The surface of the well cover is raised with a 3mm pattern to play a good role in anti-slip.

5. Anti-displacement: The well circle reserves four riveted bolt holes, which are evenly distributed at 90 degrees. Each set uses 4 ground anchor bolts, which avoids displacement due to mechanical rolling during road construction, and Has played a certain role in preventing theft.

6. Breakage damage: This is the biggest feature of nodular cast iron manhole cover. Heavy nodular cast iron manhole cover can bear 36T / 60T pressure, and light type can bear 21T. Even if the load pressure exceeds its limit, ductile iron manhole covers are not broken like ordinary cast iron manhole covers, but are slightly deformed, which has certain safety guarantees for cars and pedestrians.

Advantages of Ductile Iron Manhole Covers

Technical load test load of cast iron manhole cover: heavy 400KN, general type 250KN, light type 125KN.

Bending strength of cast iron manhole cover: average 22MPa impact strength: average 10J / m2.

Compressive strength of cast iron manhole cover: average 25MPa. Tensile strength: average 10MPa

Elastic modulus of cast iron manhole cover: average 1000MPa. Water absorption: 1%. Acid resistance: the sample is at 20%.

Immerse the cast iron manhole cover in sulfuric acid solution for 48h. There is no corrosion on the surface, and the quality loss is 1%.

This product has the functions of anti-shock, anti-sound, anti-theft, anti-slip, anti-shift, anti-break and so on.

Details of Ductile Iron Manhole Cover:

1. As for the well ring for inspection manhole cover, the inner retaining ring slot is used to place T-shaped rubber strips to form a rubber ring, which prevents the inspection manhole cover from running, jumping and ringing, and increases the surface area of the manhole cover and inner bearing ring mouth The contact and anastomosis area is increased, thereby preventing the running, jumping and ringing of the manhole cover.

2. In order to prevent the wellhead displacement of the inspection well, three 120-degree bolting points are set in the outer circle of the inspection well. By riveting with the embedded bolt, the well circle displacement caused by rolling during road construction can be avoided, and the The anti-theft performance of the well ring.

3. The surface of the manhole cover adopts the cross-shaped triangular pattern, which can effectively prevent slippage.

Our company's inspection manhole cover design is full of functions, which overcomes the shortcomings and shortcomings of the current inspection manhole cover, can meet the requirements of municipal facilities management departments and construction units, adopt mature processing materials and processing techniques, and have strict production control methods. Simple and convenient installation, Convenient, standardized size and serialization.