1. It is necessary to check whether each department is normal before using it. Recognize that the hose connections are reliable.
2. When operating, strictly abide by the stipulations in the primary parameters, and avoid overloading. Perhaps after the stroke is reached, it will continue to suppress, otherwise, when the lifting height or lifting tonnage exceeds the regulations, severe oil leakage will occur at the top of the cylinder.
3. If the amount of oil in the pump body is lacking, you need to add working oil (32 # hydraulic oil) to the pump before working.
4. For the electric pump, please refer to the operation manual of the electric pump.
5. The center of gravity of the heavy object should be selected properly, the force point of the electric jack should be reasonably selected, and the bottom surface should be flat. At the same time, the soft and hard conditions on the ground should be considered, and the tough wood should be lined.
6. After the electric jack lifts the heavy object in, the support should be used to support the heavy object in time to prevent the electric jack from being used as a support.
Three construction methods of cement drainage pipe
Three construction methods of cement drainage pipe: open cut method, pipe jacking method and shield method.
(1) Open cut method, also called slot construction method. Dig trenches according to the measurement and alignment during construction. Generally, small and medium diameter cement drainage pipes are made of reinforced concrete pipes, large and medium diameter
Use concrete or brick and stone structure ditch. Because the drainage pipe is a gravity flow pipe and the difficulty of the water surface elevation is the key to the quality of the construction, it is necessary to strictly control it according to the plan during construction. The sewage pipeline must be leak-proof and leak-proof.
During the construction of cement drainage pipes, the excavation of roads, the accumulation of materials and the excavated earthwork will cause inconvenience to the activities of residents, factories, shops and public equipment on both sides of the pipeline. Therefore, it is necessary to do a good job of planning the construction organization, speed up the construction progress, and insist on the orderliness of the construction site. Do not open the digging ditch across the entire line and delay the time. Safety equipment should be set up at the construction site to ensure the safety of pedestrians and vehicles in the past. Safety protection measures must be taken on both sides of the trench and underground pipelines to prevent the two sides of the trench from collapsing, damaging the construction of houses, and cracking other underground pipelines.
(2) Pipe jacking method. Excavation work pits are located at the viewing wells. The pits that remain facing the pipe section of the pit are composed of sleepers and steel plates to form a solid back, and the pit walls on the other sides are used as general support. For more pipe jacking pits, continuous wall or sinkhole method can be used for construction. A concrete floor is poured at the bottom of the pit and guide rails are laid. Jacks and irons are placed in the pit. The pipe is placed on the guide rail, and the jacking equipment has been used to jack up the earthwork space in the pipe. This method of digging while jacking is called the pipe jacking method.
Pipe jacking method usually chooses the enterprise mouth pipe or the flat mouth pipe. Before the cement drainage pipe is jacked in, it is filled with hemp braid at the pipe tree pipe D to avoid damaging the pipe mouth during jacking, and the expansion joint (iron parts composed of two semi-circular steel shells) is used to reinforce the pipe joint interface. After the top of the pipe section reaches the front operation pit, remove all expansion rings and fill the joints with asbestos cement. When the pipe jacking method is used for construction, there is less disturbance to the above-ground activities and underground equipment, less earthwork, no need for the foundation of the pipeline, and the pipeline is subject to better stress conditions. However, because the excavation takes place in the pipe, the diameter of the pipe should not be less than 90mm. Because the pushing resistance cannot be too large, the pipe diameter should not be greater than 2500mm.
(3) The shield method. A shield is a large working tube with an excavator and a jacking device. The lined pipe section is pushed forward as the back seat, and the space left after the pushing is used to line the wall surface, forming the pipe body. At present, large-scale drainage pipes in China have been constructed by shield tunneling.
怎么进行有用试水过程? How does a cement pipe plant perform a useful water test process?
Generally, before the cement drainage pipe is tested, the surroundings of the drainage pipe mouth will be cleaned, and the temporary pipe will be blocked. After admitting that there are no foreign objects in the pipe, find the center line of the cement drainage pipe mouth, and mark the wall. The first of these processes is:
1. To install the multi-seat squatting pan steadily, first check the consistency of the nozzle elevation and the size of the wall from the wall. Find the level, measure the height of the toilet, calculate the wall spacing, and then start the installation.
2. According to the interval between the fixing hole of the high water tank and the water supply hole, find the height of the fixing bolt, draw a cross line on the wall, clean the debris in the eye of the hole, insert the dovetail bolt into the hole, and perform the cement Twist firmly. Install the high water tank on the fixing bolts, and screw the rubber pads and nuts to moderate tightness.
3. After the cement drainage pipe is basically formed, if it is not professional, the reinforcing mesh is often painful, which means that the protective layer of the reinforcing mesh is not installed.