CN100582432C

CN100582432C - Water hammer

Info

Publication number: CN100582432C
Application number: CN200580009307A
Authority: CN
Inventors: 印锡信
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-03-24
Filing date: 2005-03-24
Publication date: 2010-01-20
Anticipated expiration: 2025-03-24
Also published as: KR100562954B1; CN1934330A; KR20050094702A

Abstract

A water hammer using a drive rod is provided. The water hammer includes a tubular main body having a hollow portion; a socket coupled to an upper end of the main body and having a water pressure supply passage; a cylindrical piston housing connected to the main body; a piston slidably installed in the piston housing, for striking a bit of a bit unit installed at a lower portion of the main body, having a hollow portion through which water is discharged, an annular pressurizing portion protruding on its outer circumferential surface, and a first communication hole connected to the hollow portion; a sliding member fitted into the main body to be coupled to the piston housing, defining a valve installation space, and creating a space portion in which the piston is received when the piston is elevated; a valve member defining the valve installation space into first and third space portions along the length of the piston, the first and second space portions having different cross-sectional areas from each other, and valve member forming a second space portion between the first and third space portions, connected to the hollow portion of the piston and connected to the first space portion when the piston is elevated; and a water pressure supply unit for supplying high pressure water delivered to the water pressure supply passage of the socket to the first and third space portions.

Description

Water hammer

Technical field

The present invention relates to a kind of drilling equipment, relate in particular to a kind of drive rod and the water hammer that adopts described drive rod that under the direct driving of water under high pressure, can as drilling operation, get out the device in darker relatively hole on the ground.

Background technology

Be used at the drilling equipment of ground punching usually based on making drill bit (bit) move back and forth the technology of (vibratory drilling method) simply and drill bit or ball cutter (cutter) being moved back and forth but also can be to the technology of its pressurization (reverse reciprocal boring method: RCD) etc.According to this vibratory drilling method, be under the state clamped by oild chuck of 800 millimeters to 3000 millimeters modular housing (casing) having diameter, by being vibrated with left and right directions, the cylinder (cylinder) that is rotatably mounted carries out boring.According to the method for RCD, utilize drive rod boring on the ground that rotary drilling-head or ball cutter are installed in its end by making the rotation of drill bit or ball cutter.This vibratory drilling method can be dealt with the situation of soft ground, and just, boring work is suitably carried out by the soft ground such as soil.Yet, for the hard drilling operation, falling by the hammer that makes large volume that to smash with the rock with underground be necessary, this just needs additional equipment, for example pile driver.

Simultaneously, the RCD method (from boring ability viewpoint, it is compared with vibratory drilling method is advanced method) in, use vibrator or circulator at first soil horizon to be scooped away, soft rock layer and hard rock layer are all scooped away by rotating the drilling rod (drill rod) that is connected with custom-designed drill bit in its end, getter device flows water and the rock that splits by the pipe of drilling rod, then rock is risen on the ground surface.The method of this RCD is used in large diameter cast-in-place and top-down (top-down) method of being used for Foundation Design basically.

Korea S has disclosed a kind of drilling equipment that uses crane gear in disclosing for 10-0372049 number.Its disclosed drilling equipment comprises drive rod (drive rod), instrument case, crushing machine, drill bit, shell and air pressure excavating gear.Drive rod is along hydraulic pressure and air duct are transferred to excavation with the hydraulic pressure that produces and air from hydraulic drive unit position.The instrument case is installed to the end of drive rod and is held various device.The crushing machine of upper end that is arranged on the inside of instrument case has piston to be impacted to be subjected to hydraulic pressure in the process that raises.The vertical drill bit that is connected to the lower end of above-mentioned instrument case is movably carried out drilling operation, so that the crushing machine impact piston.Shell is embedded in above-mentioned instrument case to form from ground surface to the passage that excavates the position.The air pressure excavating gear is connected to passage and airport and is communicated with drill bit to allow the instrument case, and the Pneumatic pipe cleaner that provides from the outside of instrument case is crossed and is discharged bottom the drill bit like this.

In above-mentioned drilling equipment, the piston of crushing machine is driven by hydraulic drive unit.Like this, along with the degree of depth increase in the hole of being bored, it is complicated that above-mentioned configuration becomes, and the optional equipment that it drives is become heavy.Particularly, because drill bit utilizes air pressure to excavate soil, therefore, when becoming dark, be difficult to dig reposefully soil along with the hole.In addition, when air is used as the pneumatic actuator of piston crushing machine, consume a large amount of air, this has just caused the sizable increase of running cost.

In above-mentioned drilling equipment, in each drive rod hammer is installed, and hydraulic grade and independent piston and the rotation excavation unit that forms to operate this hammer of high-voltage line quilt.The air cavity of rear end head (back head) is set at the upper end by the piston of operating by the hydraulic pressure of drive rod supply.Nitrogen injection in the air cavity of rear end head.When piston descended by the nitrogen that injects, the impact that is applied on the target increased.

As mentioned above, when the air cavity of rear end head was set at the upper end of piston, the air pressure of this air cavity should relatively increase with opposing and become big ground pressure along with the increase of drilling depth further.If the air cavity insufficient pressure of rear end head is enough high, then the impact force of drill bit will not meet needs ground to reduce.

Summary of the invention

In order to address the above problem, the object of the present invention is to provide a kind of drive rod with drilling equipment of simplified structure, it is by operating water hammer in order to the direct drill hammer of the pressure of water.

Another object of the present invention is to provide a kind of like this drive rod of drilling equipment, it can come operated piston by the difference that utilization is applied to the pressure on the inner surface that is limited by the valve selectivity, be used for driving the consumption of its big water gaging with reduction, and can need not special improvement and just be applied to existing rig, the present invention also provides a kind of water hammer that is connected to this drive rod.

Another object of the present invention is to provide a kind of drive rod of the drilling equipment that can get out darker relatively hole on the ground and coupled water hammer.

Another object of the present invention is to provide a kind of like this drive rod of drilling equipment, and it can increase the impact force that compressive force increases drill bit by the aerodynamic force of giving piston, in order to the pressure reduction piston of water.

Another object of the present invention is to provide a kind of like this drive rod of drilling equipment, its can be by air and water being isolated to prevent piston because abnormal work that the mixture of water and air produces as the pneumatic actuator of hammer, and can use the structure of simplification to increase the impact force of hammer.

According to an aspect of the present invention, it provides a kind of water hammer of drilling equipment, comprising: the tubular body with cavity; Be connected in the upper end of described main body and have the socket (socket) of hydraulic pressure service duct; The cylinder-piston case that is connected with described main body; Be slidably mounted in the piston in the described piston case, it is used to clash into the drill bit of the bit unit of the bottom installation that is installed in described main body, and described piston has by its cavity with the water discharging, at the annular supercharging part (pressurizing portion) of its outer surface upper process and first intercommunicating pore that is connected to described cavity; Slide unit, it is installed in the described main body treating and is connected with described piston case, and limits the valve installing space and be based upon the space segment that holds described piston when described piston is raised; Valve member, it is defined as the described valve installing space of stating along the first and the 3rd space segment of the length of described piston, described first and second space segments have different cross-sectional area mutually, described valve member forms second space segment between the described first and the 3rd space segment, described valve member is connected to the cavity of described piston and is connected to described first space segment when described piston is raised; And the hydraulic pressure feeding unit, the water under high pressure that is used for being passed to the described hydraulic pressure service duct of described socket is provided to described first and second space segments.

According to another aspect of the present invention, it provides a kind of water hammer, comprising: the tubular body with cavity; Be connected in the upper end of described main body and have the socket of hydraulic pressure service duct; The cylinder-piston case that is connected with described main body; Be slidably mounted in the piston in the described piston case, it has cavity by its discharge water, at the annular supercharging part of its outer surface upper process and first intercommunicating pore that is connected to described cavity; Slide unit, it is installed in the described main body treating and is connected with described piston case, and limits the valve installing space and be based upon the space segment that holds described piston when described piston is raised; Valve member, it is slidably mounted in the described valve installing space, and described valve installing space is defined as first space segment and second space segment, described first space segment along the cross-sectional area of the length of described piston greater than the cross-sectional area of second space segment along described first space segment, described valve member is made the 3rd space segment between described first and second space segments, and is connected to the cavity of described piston; And hydraulic pressure feeding unit, it is used for the water of pressurization is fed to described first and second space segments, promote described valve member with the difference between the cross-sectional area of the cross-sectional area that at first utilizes described first space segment and described second space segment, next promotes described piston, thereby make the water that is used for promoting described case be discharged into the cavity of described piston, and hydraulic pressure is fed to described the 3rd space so that described valve member descends in the mode that when described piston promotes, described first and second space segments is interconnected.

According to the present invention, described valve member comprises: first shield portions (shield portion), and it is installed between the inner surface of the outer surface of described supercharging part and described cylindrical part; The extension, it extends and is formed with passage from described first shield portions, and when described first shield portions and described supercharging partly were separated from each other, described first and second space segments interconnected by described passage; And second shield portions, thereby it stretches out with the end that is connected to described slide unit slidably from described extension and forms described the 3rd space segment.In addition, described hydraulic pressure feeding unit comprises: the water that is used for having predetermined pressure is fed to the pump of the hydraulic pressure service duct of described socket; The outer surface of described slide unit and described main body one of at least on the first hydraulic pressure passage that forms; Second intercommunicating pore that is connected to described the 3rd space segment that in described slide unit, forms; The interior perimeter surface of the external surface of described slide unit and described main body one of at least on form being connected to the second hydraulic pressure passage of the described first hydraulic pressure passage, and be formed the third connecting hole that connects described second hydraulic pressure passage and described first space segment.

Drive rod according to the present invention comprises: the tubular body with cavity; First link, it is installed in the top of described main body and has inlet; Second link, it is installed in the bottom of described main body and has outlet; And interior pipe, pipe has the upper end that is fixed and is connected with the inlet with described first link in described, thereby pipe forms the air storage area towards the cavity that described second link extends longitudinally to cut apart described main body in described, and pipe has one at least and is used for radially discharge water with the discharge orifice with water and air insulated, the formation of the end of described discharge orifice pipe in described in described.

The end of pipe is connected to the outlet of described second link in described, shutter is installed in a side that is adjacent to described second link of described interior pipe, so that the water of introducing by pipe in described discharge via described discharge orifice, and be used for being directed to described outlet through the water that described discharge orifice discharges at least one enter the interior pipe place that the hole is installed in the bottom that is arranged on described shutter.

Brief Description Of Drawings

The 1st figure is the lateral view according to the signal of drilling equipment of the present invention;

The 2nd figure is the partial perspective view according to water hammer of the present invention;

The sectional view of the 3rd figure shows the installment state of drive rod and water hammer;

The 4th figure is the partial perspective view according to the drive rod of one embodiment of the invention;

The 5th figure is the sectional view of drive rod;

The 6th figure is the partial perspective view according to the drive rod of another embodiment of the present invention; And

The the 7th to the 12nd figure is the sectional view of expression according to the mode of operation of water hammer of the present invention.

Realize best mode of the present invention

Shown in the 1st figure, water hammer 10 according to the present invention is configured to clash into the drill bit (bit) 21 that is guided and be installed in the end of drive rod 100 (it can reduce and rotation by drive unit) by guiding device (lead) 2 under the state that guiding device 2 stands vertically with respect to body 1.

The 2nd figure and the 3rd figure represent the water hammer 10 according to one embodiment of the invention.

With reference to accompanying drawing, water hammer 10 comprises tubular body 11, the socket (socket) 12 (it has hydraulic pressure service duct 12a and is connected to drive rod 100 to be used for supplying water under high pressure) that is connected to the end of main body 11 with cavity 11a, be installed in the bottom of main body 11 and have the bit unit 20 of drill bit 21 (this drill bit can vertically move predetermined length slidably so that rock and soil layer are holed) and be installed in the water hammer unit 30 of main body 11 between socket 12 and bit unit 20.

Now on structure, above-mentioned water hammer 10 is described in more detail.

Main body 11 is tubular, its preferably with drive rod 100 concrete identical diameters.Socket 12 engages with main body 11 in the mode that threads engage or pin joint close, and it has the conical engagement part 12b that will engage with drive rod 100 on top, and hydraulic pressure service duct 12a longitudinally forms.Socket 12 further comprises the check valve unit 13 that is used to stop through the water adverse current of hydraulic pressure service duct 12a.

Check valve unit 13 comprise integrally form with socket 12 so that open plate (sheet) the part 13a in the outlet of hydraulic pressure service duct 12a expansion ground, contact and be connected to the check valve components 13b of plate portion 13a with plate portion 13a and be connected to socket 12 elastomeric element 13e (its support component 13d with a plurality of through hole 13c supports, and flexibly with check valve components 13b bias voltage to plate portion 13a).Check valve unit 13 is not limited to the content that this exemplary is described, and also can use any structure that can stop the water adverse current by hydraulic pressure service duct 12a as check valve unit 13.

Simultaneously, the drive rod 100 that is connected to socket 12 comprises the drive rod 100 of a plurality of interconnection.Shown in the 3rd figure to 6, each drive rod units 110 comprises the force storage device (accumulator) of the impact of the piston that is used to increase water hammer 10, is described in greater detail now.

Drive rod units 110 comprise the cavity 111 with vertical formation tubular body 112, be fixedly mounted in the top of main body 112 and have inlet 113a first link 113, be installed in the bottom of main body 112 and have second link 114 of outlet 114a and have the upper end that is fixedly connected on first link 113 and the interior cavity of main body 112 is vertically cut apart to form the interior pipe 130 of air storage area 120 and water service duct.

The upper end that first link 113 is connected to tubular body 112 engages with other drive rod units treating, it comprises first substrate 113b that is fixedly connected to main body 112 and the conical engagement part 113c that extends from the first substrate 113b.Conical engagement part 113c has the screw thread that a plurality of formation are used for threads engage on its outer surface.

Second link 114 is connected to the lower end of tubular body 112, and it comprises second substrate 114b that is connected to main body 112 lower ends and the outlet 114a that is formed at its center.

First and

second links

113 and 114 are not limited to top embodiment, and they can have the opposite side that is used for drive rod units interconnection the is installed in main body 112 any form to be connected with adjacent drive rod units.

Simultaneously, the diameter that is configured in the interior pipe 130 in the cavity 111 of main body 112 is slightly littler than the diameter of cavity 111, and its upper end is connected with the inlet 113a of first link 113 so that cavity 111 is cut apart, thereby makes air storage area 120.Here, first link 113 and interior pipe 130 interconnect by welding, make the air that is stored in the air storage area 120 can not that is to say, must keep the sealing that is isolated from the outside by the connecting portion discharging of inlet 113a or the main body 112 and first link 113.The lower end of interior pipe 130 further is provided with and is used for air and the water of supplying by interior pipe 130 are kept apart it is stored in the isolated location 135 of air storage area 120.Shown in the 4th figure and the 5th figure, isolated location 135 comprises that being used to block water makes the water level that flows by interior pipe 130 block (shield) parts 136 in the end of interior pipe 130, and be formed at interior pipe 130 and block the discharge orifice 137 on the top of parts 136 vicinities, it is used for making that the water that flow by interior pipe 130 are discharged with the radial direction corresponding to air storage area 120, just is discharged to be stored in the air storage area 120 between the interior perimeter surface of the outer surface of interior pipe 130 and main body 112.Like this, be discharged from the outlet of the water of discharge orifice 137 discharging of interior pipe 130 by second link 114.Rib (rib) 139 in the bottom of interior pipe 130 is installed between the inner surface of the outer surface of pipe 130 and main body 112 supports.

Shown in the 6th figure, the end of interior pipe 130 also can be supported by the outlet 114a of second link 114.In this case, a plurality ofly enter the below that hole 138 is positioned at occlusion part spare 136 in being formed in the pipe 130, make from the current of discharge orifice 137 dischargings inlet 114a through first link 114.Like this, should have sufficient discharge orifice 137 and enter hole 138 in order to avoid be subjected to the interference of current.

Water hammer 10 is connected with the drive rod units 110 with the force storage device that is used to increase impact, its water jigger lifting piston that is used the predetermined pressure of the hydraulic pressure service duct 12a supply that has by socket 12 drives, and it is described in the 2nd figure and the 7th figure to the 12 figure.

With reference to accompanying drawing, water hammer unit 30 comprises the cylinder-piston case 31 of the cavity 11a that is connected to main body 11, and is slidably mounted in the piston case 31 to clash into the piston 32 of drill bit 21.Piston 32 comprises the leader 32a of channeling conduct when piston is mobile slidably in piston case 31 and forms sublevel gradually to form ladder (stepped) the part 32b of the valve mounting space portion 60 that valve member 50 will be installed between the inner surface of leader 32a and piston case 31.The supercharging part 32c that diameter is bigger than the diameter of leader 32a is formed at and approaches leader 32a place among the step-portion 32b.Cavity 32d vertically forms in piston 32, and step-portion 32b has the first intercommunicating pore 32e that is connected to cavity 32d.Shown in the 7th figure, from supercharging part 32c, it is bigger than the diameter D2 of step-portion 32b that the step-portion 32b of piston 32 is formed the diameter D1 that makes leader 32a, and the diameter diameter group D2 of the first intercommunicating pore 32e is little.

Simultaneously, has relative big diameter to form valve mounting space portion 60 with the inner surface of the corresponding piston case 31 of the step-portion 32b of piston 32.The end of piston case 31 is connected to the slide unit 40 in the main body of inserting between piston case 31 and the socket 12 11.Here, the interior perimeter surface of end 41 that is connected to the slide unit 40 of piston case 31 has less diameter D4 to make that it has relative small cross section long-pending.Slide unit 40 has holding portion 42, in order to the end that holds piston 32 when piston 32 promotes.

The valve member 50 that moves into slidably in piston case 31 and the piston 32 is installed in the valve mounting space portion of being made by piston case 31, piston 32 and slide unit 40 60, thus the boost in pressure piston 32 of the water by being applied to valve mounting space portion 60.Shown in the 1st figure and the 2nd figure, valve member 50 comprises first shield portions 51, and it is installed between the interior perimeter surface of the outer surface of supercharging part 32e and piston case 31 and makes first space segment 61 so that have predetermined width; Extension 52, thus it forms second space segment 62 from 51 extensions of first shield portions to be connected to the first intercommunicating pore 32e; And second shield portions 53, thereby it 52 end extends with the end that is connected to piston 32 slidably and forms the 3rd space segment 63 with end 41 collaborative works of piston 32 and slide unit 40 from the extension.

Valve member 50 comprises that the through hole 54 that extends to the end 41 of slide unit from second space segment 62 is to reduce the cross-sectional area that it applies hydraulic pressure.Here, more relatively large than the cross-sectional area between the interior perimeter surface of the end 41 of outer surface that is formed at step-portion 32b and slide unit 40 by supercharging part 32c from the outstanding cross-sectional area that forms of the outer surface of piston 32 and first shield portions 51 along the length of piston 32.In addition, even the length that first shield portions 51 that contacts with supercharging part 32c has makes when valve member 50 is raised the contact condition of itself and supercharging part 32c also can not eliminate.When this contact condition is eliminated because of the lifting of piston 32, be applied to first space segment 61 preferably passes through second space segment 62, the first intercommunicating pore 32e and piston 32 with the water of jigger lifting piston 32 cavity 32d discharging.Though do not illustrate, the holding portion 42 of the 3rd space segment 63 and slide unit 40 can interconnect.Here, in the initial improvement stage of piston 32, just when first step-portion 51 and supercharging part 32c were separated from each other, the first intercommunicating pore 32e and second space segment 62 interconnected.Along with piston 32 is further promoted, the part that piston 32 has diameter D2 is connected with extension 52, and the contact condition between the first intercommunicating pore 32e and second space segment 62 can be avoided.

For lift valve parts 50 and piston 32, in first space segment 61 and the 3rd space segment 63, be provided with the hydraulic pressure feeding unit 70 that is used to provide water (hydraulic pressure just) with predetermined pressure.Hydraulic pressure feeding unit 70 comprise be used for to the hydraulic pressure service duct 12a of socket 12 provide the pump (not shown) of hydraulic pressure, the outer surface that is formed at slide unit 40 and main body 11 one of at least on the first hydraulic pressure passage 71 and be formed at second intercommunicating pore 72 of main body 11 so that the first hydraulic pressure passage 71 is connected with the 3rd space segment 63.In addition, the second hydraulic pressure passage 74 be formed on the external surface of slide unit and main body interior perimeter surface one of at least on, so that be connected with the first hydraulic pressure passage 71, and third connecting hole 75 is formed in the piston case to connect the second hydraulic pressure passage 74 and the 3rd space segment 63.

In the hydraulic pressure feeding unit,, then needn't form second intercommunicating pore 72 if the holding portion 42 of second space segment 63 and slide unit 40 interconnects.

Bit unit 20 is installed in the lower end of main body 11 to carry out drilling operation.Bit unit 20 comprises the collar (collar) parts 22, the drill bit 21 with grab part (hooking part) 21a that has the end of being supported slidably by collar part 21 that insert in the main body 11, insert in the main body 11 and drill bit locker 23 that the grab part 21a of prevention drill bit 21 separates with main body 11, and is fixed to the front locking device 24 that main body 11 and tooth bar are connected to drill bit 21.Fixed by front locking device 24 with respect to the drill bit 21 that main body 11 is rotated.Grab part 21a and drill bit locker 23 stop drill bit 21 vertical misalignments.Bit unit 20 is not limited to the content of above-mentioned embodiment, also can use by longitudinal bracing slidably with the bit unit of the fixing any kind of direction of rotation.

The operation of the water hammer of above-mentioned drilling equipment is described referring now to the 2nd figure and the 7th figure to the 12 figure.

At first, in order to carry out drilling operation, water hammer 10 (the conical engagement part 12b of socket 12 particularly) is connected to the end of the drive rod 100 of drilling equipment.In this state, drive rod 100 is lowered, and water under high pressure uses the pump of drive rod 100 to be applied to hydraulic pressure service duct 12a.Hydraulic pressure by hydraulic pressure service duct 12a supply contracts by the check valve components 13b of the spring 13e resiliency supported of check valve unit 13 and is provided to the cavity 11a of main body 11 subsequently.Then, water is applied to first space segment 61 and the 3rd space segment 63 by hydraulic pressure feeding unit 70 (the first hydraulic pressure passage 71, the second hydraulic pressure passage 74, second intercommunicating pore 72 and third connecting hole 75 particularly).

Because the cross-sectional area of first shield portions 51 ratio is big along the cross-sectional area of second shield portions 53 of the length of piston 32, so the difference of the cross-sectional area of first and

second shield portions

51 and 53 has produced the poor of the pressure that is applied to valve member 50, thereby lift valve parts 50 are shown in the 9th figure.Here, first shield portions 51 is not separated with the supercharging part 32c of piston 32.Therefore the pressure that is applied to first space segment 61 can not be applied to the outside.Some pressure that are applied to first space segment 61 are applied to the side surface of supercharging part 32c, and vertical side of piston 32 just, thereby jigger lifting piston 32 are shown in the 10th figure.

If piston 32 is raised predetermined height in the above described manner, first shield portions 51 is separated with the outer surface of supercharging part 32c so, and will be put into second space segment 62 by the interstitial row between the supercharging part 32c and first shield portions 51 to the water that first space segment 61 is exerted pressure, and be discharged into cavity 32d (referring to the 10th figure) by the first intercommunicating pore 32e that is formed in the piston 32.

At this moment, thus first and

second space segments

61 and 62 are interconnected to reduce hydraulic pressure.Poor for the relative cross sectional area that reduces between the valve member 50 and second shield portions 53, the pressure that is applied to valve member 50 is applied to the extension 52 with through hole 54, shown in the 8th figure.Because the cross-sectional area of second shield portions 53 is bigger than the cross-sectional area of valve member 50, so valve member 50 is lowered.In this course, the first intercommunicating pore 32e engages then with extension 52 at the part place that end 32b has a diameter D2 and is intercepted.

First and

second space segments

61 and 62 interconnect by this way to set up sealed space.In this state, shown in the 11st figure and the 12nd figure, from supercharging part 32c, the diameter D1 of the leader 32a of piston 32 is bigger than the diameter of step-portion 32b.Therefore, the pressure that is applied to the supercharging part 32c of step-portion 32b becomes relatively large, thereby piston 32 is descended and final bump drill bit 21.

When piston 32 was lowered, the outer surface of supercharging part 32c contacted to cut apart first space segment 61 with first shield portions 51 of valve member 50.Then, repeat said process by exerting pressure, thereby make piston 32 can constantly clash into drill bit 21 to the part that is separated of first space segment 61.

In the process that piston 32 reduces, the air that is stored in the air storage area 120 of drive rod units 110 is compressed along with the increase of the increase of the hydraulic pressure that is used to drive hammer unit 30 and drilled hole depth.Therefore, compressive force and elastic force addition based on the decline of piston 32, thus further increased the impact of piston 32.

When the degree of depth in drilled hole increases, need further single drive rod 110 to be connected to drive rod.In this case, being stored in air in the drive rod 100 is directed with water and reduces.Then, it is poor that the air that guides to the interior pipe 130 of the drive rod units 100 that approaches water hammer is discharged between main body 112 and the interior pipe 130 to produce proportion (specific weight) by discharge orifice 137, thereby with air and water isolation.Segregate air is raised and is stored in then in the air storage area 120.

Cun Chu air increases and hydraulic pressure is compressed to bigger degree when increasing in the degree of depth in drilled hole thus.Because the increase of air compression degree, compressed air have further increased the plus-pressure (pressurizing force) of piston 32 when piston 32 is lowered with the execution drilling operation.

Therefore, the impact of piston 32 can further increase by the lifting of using the hydraulic pressure accelerating piston.

As mentioned above, according to the present invention, the water that is applied to the drive rod of drilling equipment can be to the driving force that is applied acceleration by the piston of the hammer of water-driven, thereby increases the impact of drill bit.In addition, unlike the prior art, owing to needn't provide independent inflation unit, fill the necessity of gas-pressurized when therefore having avoided the degree of depth to increase in drilled hole so that for example gas of nitrogen to be provided to hydraulic hammer.

Industrial applicability

As mentioned above, in the water hammer according to drilling equipment of the present invention, valve cell and piston can be by utilizing The water under high pressure of drive rod pumping and directly being promoted, thus controlled by pilot pressure (pilot pressure) with hydraulic pressure The system the traditional structure simplified in comparison structure of water hammer.

In addition, because pressure is applied directly to valve member and piston, so the possibility of malfunctioning machine is very little, Thereby increased operating reliability also so that drilling equipment can not considered the degree of depth in drilled hole. At this moment, can lead to Cross to the piston transmission of water hammer and accelerate driving force to improve the impact of drill bit. The piston of water hammer can be by supplying The water and air of required drive rod and driven. In addition, unlike the prior art, owing to there is no need to provide Therefore independent inflation unit fills the necessity of gas-pressurized when having avoided the degree of depth in drilled hole to increase.

Claims

1. water hammer comprises:

First tubular body with cavity;

Be connected in the upper end of described first tubular body and have the socket of hydraulic pressure service duct;

The cylinder-piston case that is connected with described first tubular body;

Be slidably mounted in the piston in the described piston case, described piston has cavity, at the annular supercharging part of the outer surface upper process of described piston and first intercommunicating pore that is connected to described cavity, wherein, water is by described cavity discharging;

Slide unit, it is installed in described first tubular body treating and is connected with described piston case, and limits the valve installing space and be based upon the space segment that holds described piston when described piston is raised;

Valve member, it is slidably mounted in the described valve installing space, and described valve installing space is defined as first space segment and second space segment, greater than the cross-sectional area along second space segment of described first space segment, described valve member comprises along the cross-sectional area of described first space segment of the length of described piston

First shield portions, described first shield portions are installed between the inner surface of the outer surface of described supercharging part and described cylindrical part;

The extension, described extension is extended and is formed with passage from described first shield portions, and when described first shield portions and described annular supercharging partly were separated from each other, described first and second space segments interconnected by described passage; And

Second shield portions, thus it stretches out with the end that is connected to described slide unit slidably from described extension and forms the 3rd space segment,

Wherein, described valve member is made described second space segment between the described first and the 3rd space segment, and is connected to the cavity of described piston; And

Described water hammer further comprises the hydraulic pressure feeding unit, it is used for the water of pressurization is fed to described first and second space segments, promote described valve member with the difference between the cross-sectional area of the cross-sectional area that at first utilizes described first space segment and described second space segment, next promotes described piston, thereby make the water that is used for promoting described case be discharged into the cavity of described piston, and hydraulic pressure is fed to described the 3rd space so that described valve member descends in the mode that when described piston promotes, described first and second space segments is circulated mutually.

2. water hammer as claimed in claim 1, wherein, described valve member comprises at least one through hole, described through hole extends to the end of described slide unit from described second space segment, is applied with the cross-sectional area of hydraulic pressure with minimizing.

3. water hammer as claimed in claim 1, wherein, described hydraulic pressure feeding unit comprises: the water that is used for having predetermined pressure is fed to the pump of the hydraulic pressure service duct of described socket; The outer surface of described slide unit and described first tubular body one of at least on the first hydraulic pressure passage that forms; Second intercommunicating pore that is connected to described the 3rd space segment that in described slide unit, forms; The interior perimeter surface of the external surface of described slide unit and described first tubular body one of at least on form will being connected to the second hydraulic pressure passage of the described first hydraulic pressure passage, and be formed the third connecting hole that connects described second hydraulic pressure passage and described first space segment.

4. water hammer as claimed in claim 1, wherein, the supercharging of described piston part has different diameters in its relative end.

5. water hammer as claimed in claim 3 also comprises being connected to the drive rod of described socket with the supply water under high pressure.

6. water hammer as claimed in claim 5, wherein, described drive rod comprises:

Second tubular body with cavity;

First link, it is installed in the top of described second tubular body and has inlet;

Second link, it is installed in the bottom of described second tubular body and has outlet; And

Interior pipe, pipe has the upper end that is fixed and is connected with the inlet with described first link in described, thereby pipe forms the air storage area towards the cavity that described second link extends longitudinally to cut apart described second tubular body in described, and pipe has one at least and is used for radially discharge water with the discharge orifice with water and air insulated, the formation of the end of described discharge orifice pipe in described in described.

7. water hammer as claimed in claim 6, wherein, the end of pipe is connected to the outlet of described second link in described, shutter is installed in a side that is adjacent to described second link of described interior pipe, so that the water of introducing by pipe in described passes through described discharge orifice discharging, and at least one is entered the interior pipe place that the hole is installed on the bottom that is arranged on described shutter, described at least one enter the hole and be used for and will be directed to described outlet through the water of described discharge orifice discharging.

8. water hammer as claimed in claim 6, wherein, the end of described interior pipe has the parts of blocking, and it is used to make water to pass through described discharge orifice discharging, and is installed at least one rib support of the inner surface of described second tubular body.

9. water hammer as claimed in claim 6, wherein, described drive rod comprises: be used for the water that will derive from the described cavity of described second tubular body and the power of the holding unit of air insulated.