RU83079U1 - PILOT HYDRAULIC HAMMER HAMMER - Google Patents

Abstract

A hydraulic piling hammer, containing a moving shock mass in the form of a hammer, located on two rods, which are rigidly fixed with the lower ends at the base of the hammer, and the upper ones in the hammer cross-beam, characterized in that, in order to increase productivity, ease of maintenance, and eliminate environmental pollution environment, reduce noise, increase service life, instead of a diesel drive, a hydraulic drive is installed containing a double-acting hydraulic cylinder, an original directional control valve a hollow rotor and an original support in the form of a ball bearing, inside of which a hydraulic cylinder is installed.

Description

Hydraulic rod piling hammer belongs to construction machines for impact dipping of reinforced concrete piles, pipes, sheet piling and other building elements.

The essence of the utility model is as follows.

At present, piling, pipe, sheet piling and other building elements are mainly driven by diesel pile drivers. Diesel hammers are characterized by: poor winding up, especially in the cold season, environmental pollution and gas contamination, increased noise, low productivity, poor controllability of the drummer's stroke and frequency of strokes, inconvenience to the cat, frequent failures, low life, short life .

To eliminate the mentioned negative factors, we propose to replace the diesel drive of the piling rod hammer with a double-acting hydraulic drive while maintaining the traditional appearance, the continuity of the hammer design and its manufacturing technology with a number of original design solutions that significantly improve the quality of the hammer.

The hydraulic pile driving hammer of FIG. 1 consists of a base 1, a beam 4 connected by two guide rods 3. A hammer 2 moves along the rods, the movement of which (lifting and accelerated downward movement) is performed by the hydraulic actuator 5.

Drummer 2 transfers the impact energy to the headgear 9 and then to the pile 20, through the shock absorber 10 and gasket 12. To mitigate the impact of the hammer case, a shock absorber is installed in the headgear 11. To prevent the headgear 9 from coming out of the guide of the hammer base 1, safety chucks 19 are installed.

A hydraulic actuator 5, a high pressure hydropneumatic accumulator 6, a low pressure hydropneumatic accumulator 7, a control valve 18, and pipelines are installed on the traverse 4.

The drive 5 in the traverse 4 is hinged and allows an angular displacement of the double-acting hydraulic cylinder, the lower rod of the hydraulic cylinder is pivotally connected by an axis 17 to the hammer and allows an angular displacement of the hydraulic cylinder rod, which compensates for the non-parallel movement of the hydraulic cylinder rod relative to the rods caused by manufacturing errors of parts.

The drive of FIG. 2 includes a double-acting hydraulic cylinder 1, a working rotary distributor 2, an articulated support 3, a coupling 4, an arm 5 with a switch 6 controlling the rise of the hammer.

The double-acting hydraulic cylinder 1 has a diameter of the lower rod greater than the diameter of the upper rod (false stem), and the areas of the working sections of the upper and lower cavities of the cylinder and the flow rate of the working fluid are selected so that the movement (fall) of the impact part of the hammer occurs at a speed greater than the speed achieved free fall. The counterfeit to the cylinder piston is connected with the possibility of radial displacement during operation, compensating for the errors of the manufactured parts.

The original working rotary distributor of Fig. 3, due to the presence of narrow slots, allows to redistribute large flows of the working fluid due to the small rotation of the hollow rotor 1 and low flow rate of the working fluid to move the control piston 2, which allows to reach the switching frequency of the distributor up to 150 switchings per minute.

Figure 4 presents the original solution of the movable connection of the hydraulic cylinder to the crosshead using a standard ball joint 1. The hinge is located inside the casing 2, convenient for attaching to the crossarm of the hammer, a double-acting hydraulic cylinder 3 is installed in the inner hole of the hinge and has the possibility of angular displacement. To reduce the destructive impact of hammer parts, the hinge is mounted in a cage through shock absorbing rings 4.

The connection of the lower rod to the hammer is made through the coupling of figure 5, also using a standard ball joint 1 allowing

the cylinder rod 2 has an angular displacement and shock-absorbing rings 3 reduce the destructive impact on the hammer parts.

The hydraulic pile-driving hammer has a hydraulic and electric system for controlling the impact energy, the frequency of impacts and the magnitude of the stroke of the hammer.

A hydraulic pile-driving hammer is hung on a pile driver of the corresponding carrying capacity, which has a hydraulic system that provides the necessary flow rate and pressure of the working fluid necessary for the hammer to operate.

The work of the hammer is based on the cyclic reciprocating movement of the hammer up and down. The cycling is ensured by a hydraulic drive and electric control.

The work of the hammer is as follows. When the hammer is installed on the pile to be hammered, the switches "Network", "Pump", "Automatic" are in the off position "O", power is not supplied to the control system. The drummer is in the lower position under the influence of its own weight. When the switch is set to the “Network” position, power is supplied to the control system, control panel and limit switches. When the switch is in the "Pump" position, power is supplied to the electromagnet of the hydraulic pump valve and the hydraulic system of the hammer is under pressure, while the upper and lower cavities of the hydraulic cylinder are under pressure through the rotary distributor, and due to the difference in working areas (the lower section of the hydraulic cylinder is smaller than the upper section ) the hammer through the shock absorber and the headgear is pressed to the end of the driven pile, the high pressure hydraulic accumulator is charged. When you press the “Manual” button or switch the switch to “Automatic” mode, power is supplied to the electromagnet of the control distributor and the latter switches the working rotary distributor, which directs the flow of working fluid to the lower

the cavity of the cylinder, and the upper cavity is connected to the drain. The drummer moves upward, while in addition to the flow of the working fluid from the pump, an additional flow of the working fluid is connected from the high pressure hydraulic accumulator, which accelerates the rise of the hammer upward. Part of the drain from the upper cavity of the hydraulic cylinder enters the hydraulic tank, and the other part of the drain enters the low-pressure hydraulic accumulator, reducing the resistance at the drain, and then is also displaced into the hydraulic tank.

Upon reaching the upper position of the hammer set by the controller, a command to move downward is automatically issued, the power supply of the solenoid of the control spool stops, the working rotary distributor switches, the working fluid flows into both cavities of the hydraulic cylinder and the hammer moves (falls) down. Since the working section of the upper cavity is larger than the lower; and the difference in cross-sectional areas and the flow rate of the working fluid are selected so that the downward movement of the striker goes at a speed significantly greater than the speed achieved by the free fall of the striker.

If the start of the upward movement was from the “Manual” mode button, then after releasing the button, the drummer will fall down, striking the pile, and the hammer will stop. Such single strokes by pressing the “Manual” button can be applied repeatedly.

If the switch "Automatic" was switched to the "Automatic" position, then the firing pin after it comes down with the limit switch 6 (Fig.2) will turn on the electromagnet of the control distributor and a repeated cycle will begin. The hammer will operate in an automatic cycle. To stop the hammer, just switch the “Automatic” switch to the “O” position.

To unload the hydraulic system from pressure, switch the "Pump" switch to the "O" position. By moving the "Network" switch to the "O" position, the power to the hammer and the hydraulic system of the copra is turned off in terms of servicing the hammer.

The control of the hammer impact energy, the frequency of strokes, the magnitude of the stroke of the hammer is provided by the controller.

LITERATURE

1 "Hammer diesel pile driving. Operation manual ”, Stroymash Plant OJSC, Sterlitamak, 2008

2 Pile driving hammers. General specifications GOST R 51041-97, Moscow, GOSSTANDART of Russia, 1997

3 Description of the invention to the patent of the Russian Federation (19) RU (11) 2184811 (13) C1.

4 Description of the invention to the patent of the Russian Federation (19) RU (11) 2109105 (13) C1.

5 "Rod hammer with a dive", patent / for utility model No. 64221.

Claims (1)

A hydraulic piling hammer, containing a moving shock mass in the form of a hammer, located on two rods, which are rigidly fixed by the lower ends at the base of the hammer, and the upper ones in the hammer crosshead, characterized in that, in order to increase productivity, ease of maintenance, and eliminate environmental pollution environment, reduce noise, increase service life, instead of a diesel drive, a hydraulic drive is installed containing a double-acting hydraulic cylinder, an original directional control valve a hollow rotor and an original support in the form of a ball bearing, inside of which a hydraulic cylinder is installed.