CN201169772Y - High-efficiency diesel pile hammer and piston structure thereof - Google Patents

Abstract

The utility model discloses a high-efficiency diesel pile hammer, which comprises a piston, a cylinder hammer and a guide bar, wherein, the guide bar is fixed on a piston body; the cylinder hammer can perform reciprocating motion along the guide bar; a blast nozzle is arranged on the piston and is a pressure air faucet which is provided with a check valve; at least one blast nozzle is arranged on the operating end face of the piston; and an oil injection nozzle is also arranged on the operating end face of the piston. The diesel pile hammer and the piston structure of the diesel pile hammer not only can guarantee that the pile hammer performs reliable construction operation on unfavorable soil such as a soft soil layer and the like but also can smoothly exhaust combustion waste gas in a cylinder cavity, have powerful initiation, good heat dissipation condition and greatly improved piling efficiency, and are widely suitable for diesel pile hammers with various specifications.

Description

Efficient diesel pile hammer and piston structure thereof

Technical field

The utility model relates to the piling machinery technical field of building operations, relates in particular to the improvement of diesel pile hammer structure.

Background technology

In the piling machinery of building operations, diesel pile hammer is with its simple structure, impact energy is big, operating maintenance is convenient and cold-start performance is good characteristics, is widely used in that bridge, burrock are built, built the road, in the pile foundation engineering constructions such as hydraulic engineering and industry, civilian construction.

Present diesel pile hammer, especially guide rod type diesel pile hammer, mainly comprise piston, the impact part cylinder hammer that is fixed on lower end of the guide rod, the parts such as crossbeam, the undercarriage on the crossbeam and guide rod that are fixed on the guide rod upper end, its operating principle is similar to two stroke diesel engine.During diesel pile hammer work, the hammer hook of pile hammer undercarriage unclamps, the free-falling of cylinder hammer, when cylinder hammer drops to when entangling piston position, piston and on piston ring just with the cylinder chamber sealing of cylinder hammer, at this moment the air between piston and cylinder just is compressed its pressure and temperature is raise fast, when being compressed to a certain degree, diesel oil is the atomizing shape through atomizer and sprays in the combustion chamber, the blast of spontaneous combustion immediately after atomized fuel sprays into, the explosive force that blast produces reaches in the stake by piston and the pile cover seat that is fixed on the piston, and stake is sunk; This explosive force also acts on the cylinder hammer is upwards takeoff along guide rod simultaneously, to prepare next working cycles.

Although existing diesel pile hammer has above-mentioned tangible use advantage in practice of construction, but also exist some wretched insufficiencies simultaneously: when existing diesel pile hammer runs into the weak soil layer in construction on the one hand, because piston and pile body settlement speed are very fast and wayward, effective compression travel of cylinder hammer cover and piston reduces significantly, be difficult to form higher oil gas compressive force and compression temperature in moment, cause the fuel in the cylinder hammer compression chamber can not completing combustion, even can't light ignition; Promptly allow to the work of detonating and also extremely dense burning smoke can occur, produce higher oil consumption, both contaminated environment was wasted fuel resource again, and the cylinder hammer can jump over more low, hit unable, until stopping operate as normal.Therefore, can't operate as normal in the diesel pile hammer ubiquity weak soil layer construction or the phenomenon of not detonating, thus perplexing pile foundation construction for a long time.On the other hand, owing to the cylinder chamber on the cylinder hammer is a back-off cup-shaped cavity that Open Side Down, the cylinder hammer that explosive bomb takeoffs, very difficult dependence self is bounced and fresh air is discharged and replenished to the exhaust combustion gases in this cavity smoothly; In other words, always residual high waste gas ratio in the closed compression air cavity that cylinder hammer cylinder chamber and piston constitute, this just directly causes oil inflame insufficient, oil consumption height, defectives such as inefficiency.

The utility model content

At the above-mentioned deficiency of existing in prior technology, technical problem to be solved in the utility model provides a kind of efficient diesel pile hammer, it can not only guarantee to carry out reliable construction operation in the weak soil layer, and can get rid of burnt gas in the cylinder chamber smoothly, and charges into fresh air.Another technical problem that will solve of the utility model is that a kind of piston structure that is used for above-mentioned efficient diesel pile hammer will be provided.

In order to solve the problems of the technologies described above, efficient diesel pile hammer of the present utility model comprises piston, cylinder hammer and guide rod, and this guide rod is fixedly installed on the piston body, and the cylinder hammer can move back and forth along guide rod, and described piston is provided with air nozzle.

The utility model is used for the piston structure of above-mentioned efficient diesel pile hammer, comprises piston, and described piston is provided with air nozzle.

After adopting said structure, because piston is provided with air nozzle, when entangling the piston tip position when cylinder hammer free-falling, continuation along with the cylinder hammer descends on the one hand, the closed cylinder cavity volume diminishes, pressure raises, on the other hand, air nozzle sprays into air with pressure to this closed cylinder chamber again simultaneously, and air pressure and temperature in the closed cylinder chamber are increased fast, and promptly makes atomized fuel spontaneous combustion blast, the explosive force driven pile that blast produces sinks stake, even on soft unfavorable soil layer, carry out piling work, also can guarantee diesel pile hammer construction operation reliably, expanded the scope of application of diesel pile hammer effectively.Again because piston is provided with air nozzle, when the cylinder hammer falls near piston, the air with pressure of air nozzle ejection not only thoroughly blows down the burnt gas in the cylinder chamber, and mends fresh air apace in the combustion chamber, it is superior to have exhaust performance, fuel combustion fully, significant advantage fully, both improved the operating efficiency of pile hammer greatly, saved fuel oil, also avoid the generation of accidents such as carbon distribution and wiping cylinder snap ring in the chamber, prolonged the application life of pile hammer.Also because piston is provided with air nozzle, air nozzle is hammered into shape with the cylinder that the band pressure gas stream blows in the whereabouts, form a kind of outer cool heat release of forced air convection, the radiating effect of cylinder hammer body is very good, cooling velocity is fast, has both alleviated because of the overheated mutual wearing and tearing that cause cylinder chamber and piston of cylinder hammer, has improved the air-tightness of cylinder piston, the reduction of cylinder hammer operating temperature also makes the atmospheric density in the cylinder chamber improve, and more helps the abundant burning of fuel oil in cylinder and the raising of pile hammer operating efficiency.

Further embodiment of the present utility model, described air nozzle be provided with one way valve band press blowing nozzle.One way valve air nozzle structure effectively stops leaking of closed cylinder chamber gases at high pressure, can spray into air with pressure to cylinder chamber, can stop the backflow of cylinder chamber inner high voltage air again.

Further again embodiment of the present utility model is provided with an air nozzle at least on the operative end surface of described piston, atomizer also is arranged on this operative end surface of piston.At least one air nozzle and atomizer thereof all are arranged on the pistons work end face, not only help air and accurately spray to target part, and have simple in structure, rationally distributed characteristics.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

Fig. 1 is the structural representation of a kind of specific embodiment of the utility model efficient diesel pile hammer;

Fig. 2 is the piston structure schematic diagram in the structure shown in Figure 1;

Fig. 3 is the structural representation of the another kind of specific embodiment of the utility model efficient diesel pile hammer;

The specific embodiment

In efficient diesel pile hammer shown in Figure 1, pile hammer comprises piston 1 and cylinder hammer 2, be fixedly connected with two guide rods that are parallel to each other 3 on the pedestal of piston 1, two guide rods 3 all adopt the identical cylinder hollow pipe of external diameter, and cylinder hammer 2 can be socketed on two guide rods 3 by the Sliding bush that installs on it with back and forth bouncing.When the cylinder chamber on the cylinder hammer 2 is socketed on the piston 1, just constituted the cylinder chamber of sealing, to form the oil inflame chamber.The bottom of piston 1 be fixedly connected sequentially pile cover seat, pile cover and fender pile device.

Be provided with air nozzle 4 and atomizer 5 on piston 1 top work surface, atomizer 5 is positioned at the position of center line of piston 1,4 outsides that are positioned at atomizer 5 of air nozzle.Atomizer 5 links to each other with oil pipe 7, and air nozzle 4 connects to pressure gas source 10 by compressed air tracheae 6, and the pressure gas source 10 in the present embodiment adopts common air compressor.On the compressed air tracheae 6 in this air compressor exit, also be respectively equipped with stop valve 9 and one-way throttle valve 8, close so that control compressed-air actuated flow, the flow direction and safety hit Push And Release thereof.

In the piston structure shown in Figure 2, the base of piston 1 is provided with two guide rod installing hole (not shown)s, and the center line of this guide rod installing hole all is parallel to each other with the center line of piston 1.On the work plane at piston 1 top, be respectively equipped with air nozzle 4 and atomizer 5; Air nozzle 4 is pressed blowing nozzle for the band that is provided with one way valve, and the one way valve in this air nozzle 4 makes compressed air outwards to spray, and can not reverse reflux.

Fig. 3 is that another kind of the present utility model is specifically implemented structure, among this embodiment except that air nozzle 4 and guide rod 3 quantity and position with the foregoing description is different, other structure is identical.In the present embodiment, on the work plane at piston 1 top, be respectively equipped with air nozzle 4 and atomizer 5, atomizer 5 still is positioned at the position of center line of piston 1, and air nozzle 4 has two and be symmetrically located at atomizer 5 both sides, and two air nozzles 4 connect to pressure gas source 10 by air flue 6 and after connecing.In the present embodiment, be installed with three guide rods that are parallel to each other 3 on the base of piston 1, these three guide rods 3 are equilateral triangle and arrange that this structure has Stability Analysis of Structures, stressed rational characteristics.

During work, hoist engine is sling cylinder hammer 2 by undercarriage, and pulling is also thrown off cylinder hammer hammer hook, and cylinder hammer 2 is freely fallen under action of gravity, and air compressor starts in advance before this, and compressed air is constantly ejection from air nozzle 4.The compressed air of air nozzle 4 ejections blows to the cylinder chamber of the cylinder hammer 2 in the whereabouts, and the burnt gas in the blowing cylinder chamber is also hammered 2 into shape to cylinder and cooled off.When cylinder hammer 2 drops down onto and during the top land position of cover and piston 1, air nozzle 4 continues to inject air with pressure to the cylinder chamber of sealing on the one hand, to obtain the higher initial gas pressure and the rate of rise; On the other hand, along with the whereabouts of cylinder hammer 2, the enclosed cavity volume reduces, air pressure in the enclosed cavity increases thereupon, and air pressure and temperature in this closed cylinder chamber increase fast, even plant stake in weak soil matter, because the effect of air nozzle, the pressure in the cylinder chamber still can rise to the fuel oil burning-point fast.When closed cylinder cavity pressure temperature acquired a certain degree, atomizer 4 was the atomizing shape with diesel oil and sprays in the cylinder, and vaporific diesel oil mixes and combustion explosion with the high pressure-temperature air, piston 1 is produced impact forces, stake is sunk, and 2 of cylinder hammers jump to certain altitude and fall again, so that another working cycles.

In the above-mentioned course of work, when the air pressure in the closed cylinder chamber during greater than air nozzle 4 supply gas pressures, the one way valve in the air nozzle 4 is closed the air feed gas circuit automatically.Pressure in the cylinder hammer 2 blast spring exhaust hood chambeies descends rapidly thereupon, opens one way valve again rapidly from the compressed air of pressure gas source 10, and air nozzle continues outwards ejection compressed air.So move in circles, finish up to piling work.

During use, can also regulate compressed air pressure and air feed speed by one-way throttle valve according to the soft situation of planting a soil property; Have in the construction of better operating condition at hard soil layer etc., then can pass through stop valve closing presure source of the gas, make it to stop air feed, very easy to use, can obtain best piling operating efficiency.

Above-mentionedly only enumerated embodiment preferred more of the present utility model, but the utility model is not limited thereto,, can also makes many improvement and conversion under the situation of the utility model basic principle.Be not limited to one, two as the air nozzle on the top land work plane, can also be three or more, air nozzle even can be connected as a single entity with atomizer, pressure gas source also is not limited to air compressor, can also be patterns such as compressed gas station, or the like.These conversion and improvement all should be considered as falling in the protection domain of the present utility model.

Claims (10)

1, a kind of efficient diesel pile hammer comprises piston (1), cylinder hammer (2) and guide rod (3), and this guide rod (3) is fixedly installed on the piston (1), and cylinder hammer (2) can move back and forth along guide rod (3), and it is characterized in that: described piston (1) is provided with air nozzle (4).

2, efficient diesel pile hammer according to claim 1 is characterized in that: described air nozzle (4) is pressed blowing nozzle for the band that is provided with one way valve.

3, efficient diesel pile hammer according to claim 2 is characterized in that: be provided with an air nozzle (4) on the operative end surface of described piston (1) at least, atomizer (5) also is arranged on this operative end surface of piston (1).

4, according to claim 1,2 or 3 described efficient diesel pile hammer, it is characterized in that: described air nozzle (4) is connected with pressure gas source (10).

5, according to claim 1,2 or 3 described efficient diesel pile hammer, it is characterized in that: be installed with two or three guide rods that are parallel to each other (3) on described piston (1) pedestal.

6, efficient diesel pile hammer according to claim 4 is characterized in that: described pressure gas source (10) is an air compressor.

7, a kind of piston structure that is used for the described efficient diesel pile hammer of claim 1 comprises piston (1), it is characterized in that: described piston (1) is provided with air nozzle (4).

8, the piston structure of efficient diesel pile hammer according to claim 7 is characterized in that: described air nozzle (4) is pressed blowing nozzle for the band that is provided with one way valve.

9, piston structure according to claim 8 is characterized in that: be provided with an air nozzle (4) on the operative end surface of described piston (1) at least, atomizer (5) also is arranged on this operative end surface of piston (1).

10, according to claim 7,8 or 9 described piston structures, it is characterized in that: described air nozzle (4) is connected with pressure gas source.

Images