CN203270571U

CN203270571U - Reinforced seal-cylinder hydraulic pile hammer

Info

Publication number: CN203270571U
Application number: CN 201320152029
Authority: CN
Inventors: 郭强
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-11-06
Anticipated expiration: 2023-03-29

Abstract

The utility model discloses a reinforced seal-cylinder hydraulic pile hammer which comprises a hydraulic power station, a hydraulic pile hammer body and an electronic control system, wherein the hydraulic pile hammer body is formed by connecting an upper hammer body, a middle hammer body, a lower hammer body and a bottom hammer body; the four hammer bodies are in the same axis; the upper hammer body, the middle hammer body and the lower hammer body form respective seal structures respectively; the upper hammer body consists of a high-pressure nitrogen chamber, and a high-pressure accumulator, a single-action lifting oil cylinder, two single-action air cylinders and a low-pressure accumulator which are mounted in the high-pressure nitrogen chamber; a rodless cavity of the single-action lifting oil cylinder is communicated with the high-pressure nitrogen chamber; rodless cavities of the single-action air cylinders are prefilled with 3-4MPa middle-pressure air; and rod cavities of the single-action air cylinders are vacuum cavities. According to the pile hammer, under the conditions that the weights of hammer cores are the same and the lifting height is the same, falling accelerations of the hammer cores can be increased to a greater extent, and design and machining requirements of a major-diameter hammer cylinder and the motion hammer cores on high sealability are lowered.

Description

Force booster type closed cylinder type hydraulic pile hammer

Technical field

The utility model belongs to the hydraulic pile hammer technical field, relates in particular to a kind of force booster type closed cylinder type hydraulic pile hammer of using in Offshore Engineering.

Background technology

Hydraulic pile hammer is the important construction equipment of the marine erection stage of offshore platform, indispensable in the oil platform pile foundation engineering, hydraulic pile hammer mainly is comprised of several parts such as hammer body, power station and control systems, wherein, the part that control system is responsible for comprises controls rising and falling of pile hammer hammer core, thereby completes the piling process.By with power station in the mutual communication of control system, complete monitoring and adjustment to call parameter in control system, guarantee the harmony of whole pile hammer system works.At present, hydraulic pile hammer both domestic and external mainly is divided into several forms:

The first pattern is to utilize the double acting jump bit of the hydraulic oil thrust of the lift cylinder of hammering the core self gravitation into shape and being used for the lift hammer core in hammer core dropping process, and this class is hammered attainable whereabouts acceleration into shape generally at 1.6-2 acceleration of gravity;

the second form is Double Acting Hydraulic Pile Hammer With Double Cylinder, the Double Acting Hydraulic Pile Hammer With Double Cylinder of generally using both at home and abroad is all to adopt Double-hydraulic-cylinder to be symmetrically arranged, be used for common lift hammer core, on described hydraulic jack, two-way plug-in valve is housed, the external control sequence valve, a plurality of control valve elements such as two-bit triplet electromagnetic valve, the open and close of these control valves all need the time, owing to respectively being equipped with each other a cover control valve element on two oil cylinders, therefore have valve body each other spool wearing and tearing after work a period of time different, and then can cause two cylinder piston rods asynchronous commutating period, fluid enters respectively two oil cylinders by above-mentioned nonsynchronous valve and will shunt the irregular twin-tub asynchrony phenomenon that causes at this moment, this phenomenon will extend the synchronous rise and fall time of twin-tub, the length of commutating period can directly affect the cylinder piston rod speed that moves up and down, hammer core cycle can be affected within a period of time under continuous duty, make the operating efficiency of pile hammer seriously reduce,

In addition, Chinese patent " multi-function closed cylinder type hydraulic piling hammer " (notification number is CN101748730B), its action principle is: except utilize in hammer core dropping process the additional active force of self gravitation and lift cylinder top also respectively in airtight hammer cylinder barrel on the top of hammer core arrange an air chamber for increasing a compressed air thrust and on hammer the core bottom into shape and one vacuum chamber be set for increasing a pull of vacuum, there are altogether four active forces identical with the hammer core direction of motion to act on the hammer core, make the hammer core obtain larger whereabouts acceleration in the process that falls.

but, should " multi-function closed cylinder type hydraulic piling hammer " have following defective in manufacturing and use procedure: in fact vacuum of (1) upper hammer core bottom setting can't realize, because, realize that vacuum must guarantee to hammer into shape the sealing between cylinder barrel and upper and lower hammer core, present stage, the cylindrical shell that reaches 7～8m for larger diameter 800～1800mm and ldd length can't process fineness and the exigent axiality of 0.4-0.2 both at home and abroad, (2) on, easily form cushioning effect between lower hammer core, and then cause, lower hammer core does not contact and hammers into shape the generation that cylinder barrel is split up phenomenon, because, if on, sealing between lower hammer core and hammer cylinder barrel is not guaranteed or in use makes vacuum environment not owing to rubbing between upper hammer core and hammer cylinder barrel, the gas of upper hammer core top band pressure progresses into upper hammer core motion, between lower hammer core, can't discharge, can gather a large amount of gases in short period and form air cushion, air cushion can form vapour lock impact hammer core falling speed, when serious, weight is larger hammer core whereabouts can will be hammered cylinder barrel into shape by air cushion and be split up gradually, (3) on upper hammer core, lower friction of motion resistance is large, impact hammer core movement velocity and acceleration, therefore, if realize the vacuum chamber requirement of hammer core bottom, often need to increase seal quantity, concerning major diameter hammer cylinder barrel, the seal usage quantity is more, namely mean with the contact area of cylinder barrel larger, make frictional resistance very large, very important, in pile hammer hammer core number of times commonly used is the high-speed motion of 42 times per minute, friction also produces a large amount of heat effects cylinder strengths, the cylindrical shell machining accuracy will change, cause barrel distortion, seal failure, vacuum failure.

Summary of the invention

In order to overcome the problem in background technology, the purpose of this utility model is to provide a kind of force booster type closed cylinder type hydraulic pile hammer, in equal hammer core weight, under equal lifting height condition, can improve largely hammer core whereabouts acceleration, and reduce major diameter hammer cylinder and hammered core into shape to design and the processing request of high leakproofness with motion.

In order to realize the foregoing invention purpose, the utility model adopts technical scheme as described below:

A kind of force booster type closed cylinder type hydraulic pile hammer, comprise hydraulic power station, hydraulic pile hammer body and electric-control system, described hydraulic pile hammer body is connected to form by top hammer body, middle part hammer body, bottom hammer body and bottom hammer body, above-mentioned four parts all on an axis, wherein, top hammer body, middle part hammer body and bottom hammer body form respectively closed structure separately;

The top hammer body is by the elevated pressure nitrogen air chamber and be arranged on high pressure accumulator, the single-acting lift cylinder of high pressure nitrogen chamber interior, two single-acting cylinders and low pressure accumulator and form, the rodless cavity of described single-acting lift cylinder is communicated with the elevated pressure nitrogen air chamber, be filled with in advance the middle pressure air of 3～4MPa in the rodless cavity of described single-acting cylinder, the rod chamber of single-acting cylinder is vacuum chamber;

The middle part hammer body is comprised of Hydraulic integration block assembly, oil-feed control valve and oil return control valve, and oil-feed control valve and oil return control valve are installed on the Hydraulic integration block assembly;

the bottom hammer body is by the hammer cylindrical shell, sensor and the upper hammer core that is arranged on the hammer inner barrel, upper hammer core sealing device, lower hammer core and lower hammer core sealing device form, upper hammer core upper, lower both ends are provided with hammer core sealing device, upper hammer core is cylindrical structure, and be extended with annular boss on cylindrical external surface, annular boss is laid with axially extending bore along its circumferencial direction, described lower hammer core is positioned at the bottom of hammer core, lower hammer core sealing device is arranged on the bottom of lower hammer core, sensor setting is electrically connected to described electric-control system on the outer wall of hammer cylindrical shell,

Described bottom hammer body directly contacts with lower hammer core for block hitting by forming for block hitting and pile protection cylinder, is installed in the pile protection cylinder for block hitting.

Further, the rodless cavity of described single-acting cylinder is by the external middle pressure air cushioning tank of connection rubber tube assembly, and middle pressure air cushioning tank adds the air of 3MPa--4MPa in advance.

The operating principle of this force booster type closed cylinder type hydraulic pile driver is described below:

The hydraulic oil that hydraulic power station provides enters the hydraulic pile hammer hammer body by the road, when oil-feed control valve and oil return control valve are opened simultaneously, the hydraulic power station oil-feed is got back to hydraulic power station through the pile hammer hydraulic system, and hydraulic system is carried out idle cycle work, and system is carried out preheating.

During piling work, after hydraulic system preheating work is completed, to be at first that high pressure accumulator is oil-filled, when high pressure accumulator oil-filled when the system pressure, the oil-feed control valve is opened, the oil return control valve is closed, hydraulic oil enters the rod chamber of single-acting lift cylinder, the energy that hydraulic oil provides overcomes the air pressure of the nitrogen pressure of single-acting lift cylinder rodless cavity, two single-acting cylinder rodless cavities and pull of vacuum and frictional force and other mechanical resistances in rod chamber, in lifting, the hammer core is up, is controlled the lifting height of upper hammer core by electric-control system and sensor.When upper hammer core rises to setting height, close the oil-feed control valve; At this moment, oil-feed control valve, oil return control valve all are in closed condition, and upper hammer core hovers over desired location.

When upper hammer core hovers over desired location, open the oil return control valve, pull of vacuum in the pressure of the middle pressure air (pressure is 3MPa-4MPa) of upper hammer core in the pressure of the rodless cavity inner high voltage nitrogen of self gravitation, single-acting lift cylinder, two single-acting cylinder rodless cavities and two single-acting cylinder rod chambers, amount under the effect of 6 power, overcome the impact of oil extraction resistance, seal friction power and other mechanical resistances in single-acting lift cylinder rod chamber, accelerate to move downward; Simultaneously, owing to being provided with through hole on upper hammer core, make the hammer core when moving downward, the air of upper hammer core bottom arrives the top of upper hammer core along through hole, greatly reduced air resistance, has effectively increased the acceleration that upper hammer core falls; Upper hammer core moves downward process mesolow accumulator and absorbs the hydraulic oil of discharging in the single-acting lift cylinder rod chamber, thereby reduces to reduce the oil extraction resistance due to the impact of long pipe runs on oil extraction speed; When upper hammer core moves to lower hammer core, bump, lower hammer core moves downward, and drives moving downward for block hitting and pile protection cylinder of contact with it.

Owing to adopting technique scheme, the utlity model has following superiority:

1, the utility model is by arranging two single-acting cylinders on the hammer body of top, and the rod chamber of single-acting cylinder is made as vacuum chamber and its rodless cavity is filled with middle pressure air, increased with upper hammer core and moved downward the identical active force of direction, can effectively improve the acceleration that upper hammer core falls;

2, the upper hammer core in the utility model is made as the structure which is provided with through hole, make the air of hammer core upper and lower mutually circulate, do not need to guarantee the high leakproofness requirement separately of hammer core upper and lower, reduced seal quantity, reduction in a big way frictional resistance and the air resistance in upper hammer core decline process, the acceleration in the time of can effectively improving upper hammer core and fall.

3, structure design of the present utility model has reduced the processing and manufacturing difficulty, and cost of production reduces greatly simultaneously.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of Hydraulic integration block assembly in Fig. 1;

Fig. 3 is the structural representation of upper hammer core in Fig. 1;

Fig. 4 is the top view of Fig. 3;

In figure: 1-elevated pressure nitrogen air chamber; The 2-single-acting cylinder; 3-single-acting lift cylinder; 4-Hydraulic integration block assembly; 5-hammers cylindrical shell into shape; The 6-sensor; The upper hammer of 7-core sealing device; The upper hammer of 8-core; Hammer core into shape under 9-; Hammer core sealing device under 10-; 11-is for block hitting; 12-pile protection cylinder; 13-oil-feed control valve; The 14-high pressure accumulator; The 15-low pressure accumulator; 16-oil return control valve; Press the air cushioning tank in 17-; 18-connection rubber tube assembly; The 19-through hole.

The specific embodiment

Below in conjunction with drawings and Examples, the technical solution of the utility model is described in further detail.

In conjunction with Fig. 1 and Fig. 2, described force booster type closed cylinder type hydraulic pile hammer is comprised of hydraulic power station, hydraulic pile hammer body and electric-control system; Described hydraulic pile hammer body is connected to form by top hammer body, middle part hammer body, bottom hammer body and bottom hammer body, above-mentioned four parts all on an axis, wherein, top hammer body, middle part hammer body and bottom hammer body form respectively closed structure separately; The top hammer body is by elevated pressure nitrogen air chamber 1 and be arranged on high pressure accumulator 14, the single-acting lift cylinder 3 of elevated pressure nitrogen air chamber 1 inside, two single-acting cylinders 2 and low pressure accumulator 15 and form, the rodless cavity of described single-acting lift cylinder 3 is communicated with elevated pressure nitrogen air chamber 1, be filled with in advance the middle pressure air of 3～4MPa in the rodless cavity of described single-acting cylinder 2, the rod chamber of single-acting cylinder 2 is vacuum chamber;

As shown in Figure 2, the middle part hammer body is comprised of Hydraulic integration block assembly 4, oil-feed control valve 13 and oil return control valve 16, oil-feed control valve 13 and oil return control valve 16 are installed on Hydraulic integration block assembly 4, described Hydraulic integration block assembly 4 according to the signal controlling that electric-control system sends advance, the opening and closing of oil return control valve, and then control moving up and down of single-acting lift cylinder 3 piston rods.

the bottom hammer body is by hammer cylindrical shell 5, sensor 6 and the upper hammer core 8 that is arranged on hammer cylindrical shell 5 inside, upper hammer core sealing device 7, lower hammer core 9 and lower hammer core sealing device 10 form, upper hammer core 8 upper, lower both ends are provided with hammer core sealing device 7, upper hammer core 8 is cylindrical structure, and be extended with annular boss on cylindrical external surface, annular boss is laid with axially extending bore 19 along its circumferencial direction, described lower hammer core 9 is positioned at the bottom of hammer core 8, lower hammer core sealing device 10 is arranged on the bottom of lower hammer core 9, sensor 6 is arranged on the outer wall of hammer cylindrical shell 5, sensor 6 and electric-control system are electrically connected to and are used for controlling the height that upper hammer core 8 rises, the single-acting lift cylinder 3 of described top hammer body with are connected the piston rod of a single-acting cylinder 2 and pass respectively Hydraulic integration block assembly 4 and be connected with upper hammer core 8.

Described bottom hammer body directly contacts with lower hammer core 9 for block hitting 11 by forming for block hitting 11 and pile protection cylinder 12, is installed in pile protection cylinder 12 for block hitting 11.

The rodless cavity of described single-acting cylinder 2 is by the external middle pressure air cushioning tank of connection rubber tube assembly 18, and middle pressure air cushioning tank 17 adds the air of 3MPa～4MPa in advance; When upper hammer core 8 moves back and forth, because the rodless cavity of middle pressure air cushioning tank 17 and single-acting cylinder 2 is connected, therefore, pressure in single-acting cylinder 2 rodless cavities can not produce larger variation due to the reciprocating motion of upper hammer core 8, makes the active force of middle pressure air effect on upper hammer core 8 in single-acting cylinder 2 rodless cavities remain constant; In addition, also can be according to the drive piles blow energy of needs of reality, the quantity that increases single-acting cylinder 2 is to obtain larger hammer core whereabouts acceleration, the corresponding middle pressure air cushioning tank that just needs to increase equal number of the increase of single-acting cylinder 2 quantity.

As shown in Fig. 3,4, described upper hammer core 8 is cylindrical structure, and be extended with annular boss on cylindrical external surface, annular boss is laid with axially extending bore 19 along its circumferencial direction, and the design of upper hammer core 8 this structures makes the air between two air chambers that form between the upper and lower end of hammer core 8 and hammer cylindrical shell 5 mutually to circulate, on the one hand, can make hammer core 8 when falling, the air of upper hammer core 8 bottoms enters into its top along through hole, has reduced air resistance; On the other hand, need not guarantee hammer core 8 and hammer between cylindrical shell 5 than high leakproofness, the usage quantity of seal is less, a guide effect that only needs seal to play hammer core 8 gets final product, frictional resistance is corresponding reducing also, further improved upper hammer core 8 whereabouts acceleration.

hydraulic pile hammer of the present utility model makes the hammer core utilize himself gravity in dropping process, high pressure nitrogen pressure in single-acting lift cylinder rodless cavity, the pressure of the middle pressure air in two single-acting cylinder rodless cavities, two pulls of vacuum that the single-acting cylinder rod chamber is interior, amount to 6 active forces identical with hammer core falling direction, than existing " multi-function closed cylinder type hydraulic piling hammer " many two active forces, thereby make the acceleration of gravity of many 1～2 G of acceleration ratio existing " multi-function closed cylinder type hydraulic piling hammer " that obtain under the prerequisite of the equal height of drop of equal hammer core weight, can realize relatively easily hammering into shape the acceleration of gravity of 4～5 G of core whereabouts acceleration according to present technical condition.

The utility model is compared with existing " Double Acting Hydraulic Pile Hammer With Double Cylinder ", two single-acting cylinders in the utility model are external middle pressure air cushioning tank directly, the commutation of cylinder piston rod need not the control valve elements such as reversal valve, therefore without the impact of commutating period, can realize synchronous effect, operating efficiency has improved greatly; In addition, the hammer core is in dropping process, the utility model has 6 active forces identical with hammer core falling direction, have more 4 active forces than existing " Double Acting Hydraulic Pile Hammer With Double Cylinder ", thereby make the acceleration of gravity of many 2～3 G of acceleration ratio " Double Acting Hydraulic Pile Hammer With Double Cylinder " that the utility model obtains under the prerequisite of equal hammer core weight, equal height of drop.

Embodiment two

Structure of the present utility model is with reference to embodiment one, and difference is that the rod chamber with the single-acting cylinder 2 in embodiment one is not made as vacuum structure, and the rod chamber of single-acting cylinder 2 and upper hammer core 8 tops are connected with the air chamber that hammer cylindrical shell 5 forms.

The hydraulic pile hammer of this programme makes the hammer core utilize the pressure of the middle pressure air in high pressure nitrogen pressure in himself gravity, single-acting lift cylinder rodless cavity, two single-acting cylinder rodless cavities in dropping process, amounting to 4 active forces identical with hammer core falling direction, is to obtain larger acceleration in hammer heart dropping process.

Claims

1. force booster type closed cylinder type hydraulic pile hammer, comprise hydraulic power station, hydraulic pile hammer body and electric-control system, described hydraulic pile hammer body is connected to form by top hammer body, middle part hammer body, bottom hammer body and bottom hammer body, above-mentioned four parts all on an axis, wherein, top hammer body, middle part hammer body and bottom hammer body form respectively closed structure separately, it is characterized in that:

The top hammer body is by elevated pressure nitrogen air chamber (1) and be arranged on elevated pressure nitrogen air chamber (1) inner high pressure accumulator (14), single-acting lift cylinder (3), two single-acting cylinders (2) and low pressure accumulator (15) and form, the rodless cavity of described single-acting lift cylinder (3) is communicated with elevated pressure nitrogen air chamber (1), be filled with in advance the middle pressure air of 3～4MPa in the rodless cavity of described single-acting cylinder (2), the rod chamber of single-acting cylinder (2) is vacuum chamber;

The middle part hammer body is comprised of Hydraulic integration block assembly (4), oil-feed control valve (13) and oil return control valve (16), and oil-feed control valve and oil return control valve are installed on Hydraulic integration block assembly (4);

the bottom hammer body is by hammer cylindrical shell (5), sensor (6) and be arranged on the inner upper hammer core (8) of hammer cylindrical shell (5), upper hammer core sealing device (7), lower hammer core (9) and lower hammer core sealing device (10) form, upper hammer core upper, lower both ends are provided with hammer core sealing device (7), upper hammer core (8) is cylindrical structure, and be provided with annular boss on cylindrical external surface, annular boss is laid with axially extending bore (19) along its circumferencial direction, described lower hammer core is positioned at the bottom of hammer core, lower hammer core sealing device (10) is arranged on the bottom of lower hammer core, sensor (6) is arranged on the outer wall of hammering cylindrical shell (5) into shape and is electrically connected to described electric-control system,

The bottom hammer body directly contacts with lower hammer core for block hitting (11) by forming for block hitting (11) and pile protection cylinder (12), is installed in the pile protection cylinder for block hitting.

2. force booster type closed cylinder type hydraulic pile hammer according to claim 1, it is characterized in that: the rodless cavity of described single-acting cylinder (2) is by the external middle pressure air cushioning tank of connection rubber tube assembly (18) (17), and middle pressure air cushioning tank adds the air of 3MPa--4MPa in advance.