Hainan plastic inspection well

The plastic inspection well is composed of well seat, shaft, well cover, connecting pipe fittings, etc. The road load is applied around the inspection well through the well cover and well seat to avoid the damage of the road load to the inspection well. The cover seat has the function of floating up and down, which can actively adapt to the height change of the road surface. At the same time, the shaft can intercept the corresponding length according to the burial depth on the site, which has great flexibility. The shaft, water inlet (outlet) pipe and well seat are flexibly connected by rubber sealing ring, which can adapt to small range of internal angle changes, and is convenient and fast for construction, with good sealing performance, effective leakage prevention, environmental protection and energy saving.

1. The manhole covers with DN315 and below in the green belt shall be made of rigid polyvinyl chloride, and the rigid polyvinyl chloride manhole covers shall be sealed in different ways according to the pipe materials of the shaft. However, when the manhole with DN450 and above is set in the green belt, the manhole covers on ordinary roads shall be used instead of being used as concrete foundations.

The manhole cover made of PVC-U has poor low temperature resistance. When the temperature is lower than 10 ° C, the PVC_U material has brittle weakness. Therefore, the manhole cover made of HDPE, modified PVC or polymer matrix composite materials should be used in cold regions.

2. The manhole cover with protective cover base shall be selected for the inspection well cover on the road to prevent the vehicle from directly acting on the shaft. The manhole cover shall be selected on the road. The manhole cover of different grades shall also be selected according to the nature of vehicles passing through the road.

3. All PVC-U manhole covers on the plastic inspection well for sewage have sealing performance, and the inner cover is used to prevent the harmful and toxic gas in the pipeline from emitting to the outside and damaging the environmental health. At the same time, the inner cover can also play the role of thermal insulation of drainage pipes.

1. The connection between the well seat and the shaft generally has the following connection modes:

① When the wellbore diameter is DN315 and below, it can be bonded. The bonding connection is only applicable to flat wall solid wall pipe and flat wall structural wall pipe (perforated pipe). The socket type of the wellhead is socket type, and adhesive is used instead of rubber ring.

② When the wellbore diameter is DN315 or above, it can also be sealed with a rubber ring with a recess socket. The wellbore is only applicable to flat wall solid wall pipes and flat wall structural wall pipes.

2. The bearing strength is also an important factor in the selection of various connection modes between the well seat and the shaft.

1. Whether the rainwater inspection well has the function of settling mud varies from place to place. The traditional brick well generally does not have a desilting place. The plastic inspection well has a small diameter, which is inconvenient for conventional cleaning, so it is stipulated that the well seat under the road gutter inlet must use a desilting well seat.

2. The initial inspection well is the first inspection well upstream of the pipe. If the discharge pipe and the household pipe are flush connected at the top of the pipe at the initial inspection well, the well seat such as 90 ° elbow is generally used; If the difference between the bottom elevation of the discharge pipe and the household connection pipe at the starting well is greater than or equal to the specified critical value, the vertical elbow shall be selected for the starting inspection well seat.

3. The joint type between the well seat and the buried drainage pipe is determined by the drainage pipe material. At present, the most commonly used outer diameter series of buried plastic drainage pipes are:

① For DN100~160 buried pipes, PVC - U flat wall solid wall pipes are generally selected:

② For DN200~450 buried pipes, PVC -- U double wall corrugated pipes or flat wall structural wall pipes are generally selected;

③ For buried pipes larger than DN450, PE double wall corrugated pipes or flat wall structural wall pipes are generally selected.

1. Connecting pipe fittings are indispensable components in the application of plastic inspection wells. In order to meet the needs of changing the angle and pipe diameter at the connection. Each construction party can select pipe fittings suitable for construction according to the application needs in the project.

2. Application regulations of confluent pipe fittings: confluent pipe fittings are applicable to narrow areas around buildings, many kinds of pipelines, shallow burial depth, many discharge pipes and places where it is not convenient to set inspection wells. Even if there is a blockage problem, the cleaning opening extending from the ground shall be used for cleaning.

3. Requirements for saddle joints.

A saddle joint can be installed at any elevation and direction according to the diameter of the incoming pipe. As the nozzle of each manufacturer is different, it should be set according to the product sample.