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installation and maintenance of penstocks

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The penstock is used to close and open the control facility of the water discharge (discharge) channel. An important part of hydraulic structures can ,be used to intercept water flow, control water level, adjust the flow, discharge sediment, and float, etc. Penstocks are widely used in waterworks, sewage plants, petroleum, chemical, metallurgy, environmental protection, electric power, irrigation and drainage, drainage, ponds and weirs, rivers, and other projects to cut off, adjust flow, and control water level. So how to install and maintain penstocks and hoisting equipment? Let me give you a brief introduction:

Table of Contents

Cast iron penstock factory

Installation of the penstock:

The correct installation of the channel penstock determines the water-stop effect of the penstock. When installing, be sure to read the installation manual carefully or install it correctly according to the requirements of the on-site guide installers of our factory.

The channel penstock’s door groove and the board surface are installed as a whole. For the secondary pouring structure, the penstock frame should be adjusted and fixed on the basis of the sealing water stop surface and the lateral guide surface before pouring, and the backside is supported to prevent deformation, and the concrete is poured. It must be sealed to prevent leakage.

Before the channel penstock is installed for pouring concrete, adjust the eccentricity and gap between the penstock and the penstock frame, and lock the wedge device. In order to achieve a good water stop effect. The front surface of the channel penstock must be installed in accordance with the design requirements, otherwise, the plate surface will be broken due to the wrong direction of the plate surface. When the reverse pressure is encountered, it must be stated when ordering to prevent major accidents.

The following 7 points should be paid attention to during the installation of channel penstocks:
1. Install the hoisting device, insert the screw rod into the hoist, pay attention to the center of the hoist, the axis of the screw rod, and the symmetry center of the channel penstock must be on a vertical line.
2. Insert the buried part of the door frame of the channel penstock into the reserved hole and use an oblique block to level and correct it so that the channel penstock guide rail coincides with the vertical line.
3. The electric hoist and electric head are installed according to the installation and debugging operation of the matching electric head.
4. After adjusting the center of the screw rod, weld the base plate of the penstock hoist to the embedded steel plate.
5. A lock nut must be installed on the screw rod to prevent over-limit when opening downwards, which may cause the adjustment channel penstock and the screw rod to fall off and cause losses.
6. Install the screw guard and fasten it on the top of the penstock hoist with bolts.
7. Check the sealing condition of the channel penstock, if there is serious leakage, adjust it immediately until the ideal sealing effect is achieved.

 

Cast iron penstock factory

 

Precautions and maintenance of the penstock during use:

Pay attention to the upper and lower limit positions of the penstock when opening and closing the penstock to avoid damage to the penstock or hoist. If there is any abnormality during the opening and closing of the penstock, stop using it immediately and check and deal with it in time.

The penstock should be treated with rust prevention during use, and grease or oil should be added to the penstock hoist, bearing, nut, screw, and other parts every 2-3 months, and the surface of the penstock should be de-rusted and painted with anti-rust paint once a year. During major maintenance, the bearing part should be filled with butter to ensure that the water-stop joint surface of the penstock and the penstock frame is smooth during opening and closing.

Hydraulic metal structure equipment is one of the important equipment in water conservancy and hydropower projects. In the past 20 years, my country has built a large number of water conservancy and hydropower projects, and the technical level of hydraulic metal structure equipment has been greatly improved. As the main metal structure equipment, penstocks and opening and closing equipment are widely used in various water conservancy and hydropower projects and play a very important role in the normal operation of the project and the full utilization of benefits.

In water intake and delivery projects, penstocks and opening and closing equipment are widely used in control penstocks, diversion penstocks, exit penstocks, and culvert entrances and exits. The penstocks can be opened and closed flexibly and reliably to exert their functions and benefits and maintain building Safety.

The penstock is one of the important components of hydraulic structures, and generally consists of three parts: movable part, buried part, and opening and closing equipment. It can close the orifices of the building according to needs and can open all or part of the orifices to adjust the upstream and downstream water level and flow, so as to obtain benefits such as flood control, water supply, irrigation, and water delivery. The penstocks are usually set on the main roads near the water intake and delivery buildings, and the penstocks can be opened and closed flexibly and reliably to exert their functions and benefits and maintain the safety of the building.

Cast iron penstock factory

Opening and closing equipment is used as a part of the penstock to operate the movement of the door leaf to achieve the purpose of opening and closing the orifice. In water conservancy and hydropower projects, the hoisting machinery used for opening and closing penstocks is collectively referred to as hoisting equipment, including penstock hoists for opening and closing penstocks and trash cleaners for water intake trash racks. The hoist is a piece of hoisting equipment specially used for opening and closing penstocks in hydraulic structures. Its main characteristics are:

large load changes, low opening and closing speeds, generally low working levels, and must be adapted to penstock operation Special requirements in the.

The channel penstock hoist needs to be well maintained, so everyone knows how to do the post-maintenance of the channel penstock hoist? We all know that the daily maintenance of channel penstock hoist can be summarized as cleaning, tightening, adjustment, and smoothing operations:

Cleaning: During the operation of the opening and closing machinery, due to the influence of oil and dust, it will inevitably cause the surface and key parts of the equipment to be dirty. In severe cases, the equipment may not operate normally, or even cause accidents, so regular cleaning operations must be performed.

Tightening: Although the tightening connection of the penstock hoist has been planned and installed with corresponding anti-loosening measures, it may be loosened due to force and vibration during the operation. The effect of loosening of fasteners is related to its own function. For example, the loosening of the wire rope compression bolts and the connecting bolts of the spreader will change the force and movement of the forced connection parts and pose a safety hazard.

Adjustment: During the operation of the opening and closing equipment, due to looseness, wear, and other reasons, the relationship between parts and operating parameters will change. If it is not adjusted in time, it will cause vibration and noise, which will lead to accelerated parts wear. The gaps should be checked and adjusted regularly.

Smoothness: In the opening and closing equipment, all parts that have relative movement must be kept smooth to reduce wear and extend the service life of the equipment; reduce the failure rate, save maintenance costs, and reduce energy consumption.

When we all perform post-maintenance of the channel penstock hoist, we all need to maintain our penstocks according to the above maintenance methods, and the correct maintenance of the penstocks can bring out the best working condition of the equipment.

 

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