CN214463866U - Passive valve type hydraulic down-the-hole hammer - Google Patents

Abstract

The utility model discloses a passive valve formula down-the-hole hammer that surges, including top connection, nozzle, gasket, inner cylinder, heart valve, outer cylinder, impact hammer, half-closing hoop, square cover and hammering block, the top connection bottom is connected with the top of outer cylinder, nozzle, gasket set up in the top connection, the inner cylinder sets up in the outer cylinder, the case of heart valve, valve rod insert respectively in the case chamber and the valve rod intracavity of inner cylinder, the bottom of inner cylinder is the piston chamber, the piston and the hammer block of impact hammer insert respectively in the piston chamber of inner cylinder and the hammer block intracavity of outer cylinder, outer cylinder bottom is connected with square cover, the hammering block inserts in the square cover; the utility model discloses can effectively reduce the stifled chance of moving part card and improve the hammer downhole operation reliability that surges, eliminate the impact hammer rigidity completely and beat the phenomenon and improve the liquid energy utilization rate and easily decrease a working life, simply change nozzle and heart valve structural parameter can adjust impact property, adjust the pump discharge capacity of guaranteeing the hammer normal work that surges on a large scale, possess simple structure, processing facility, cost of manufacture greatly reduced's technical advantage.

Description

Passive valve type hydraulic down-the-hole hammer

Technical Field

The utility model relates to a drilling engineering technical field and geology rock core probing technical field especially relate to a valve formula down-the-hole hammer that surges.

Background

In the drilling process of drilling or geological core drilling, a hydraulic down-the-hole hammer (hereinafter referred to as a hydraulic hammer) connected to the upper end of a drill bit or a core drill tool generates and outputs high-frequency axial vibration to the drill bit under the driving of drilling fluid, the vibration and the rotary motion of the drill bit jointly act on rocks, the rocks are cut and crushed in an impact rotary mode, and the drilling efficiency is improved.

The current valve type hydraulic hammer has the technical defects that a core valve is easy to block under the environment of high-viscosity drilling fluid, a punching hammer is rigidly kicked back when the hydraulic hammer works, and the discharge capacity matching is difficult when the hydraulic hammer works together with other large-discharge bottom hole power drilling tools (such as a screw drill and a turbine drill).

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a passive valve formula down-the-hole hammer that surges to solve the problem that above-mentioned prior art exists, its operating device for being switched the water route by the hammer-punch propelling movement heart valve and realize hammer block reciprocating motion, and the operating performance of the structural dimension regulation hydraulic hammer of this mechanism's accessible change heart valve and nozzle simply.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a passive valve formula down-the-hole hammer that surges, including top connection, nozzle, gasket, inner cylinder, heart valve, outer cylinder, punching hammer, half-closed hoop, square cover and hammering block, top connection, nozzle, inner cylinder, outer cylinder and square cover are hollow structure, top connection bottom is connected with the top of outer cylinder, nozzle, gasket set up in the top connection, the inner cylinder set up in the bottom of nozzle and lie in the outer cylinder, the case of heart valve, valve rod insert respectively in the case chamber and the valve rod intracavity of inner cylinder, the bottom of inner cylinder is the piston chamber, punching hammer set up in the bottom of inner cylinder, just the piston and the hammer block of punching hammer insert respectively in the piston chamber of inner cylinder and the hammer block intracavity of outer cylinder, outer cylinder bottom with the square cover is connected, the axle journal and the axle side of hammering block insert respectively in the neck chamber and the square chamber of square cover, and a hoop groove is arranged on the shaft neck of the square sleeve, two half-closed hoops are clamped in the hoop groove, and the outer diameter of each half-closed hoop is the same as the diameter of the hammer body cavity of the outer cylinder.

Preferably, the bottom of the upper joint is in threaded connection with the top of the outer cylinder, and the bottom of the outer cylinder is in threaded connection with the square sleeve.

Preferably, the nozzle is seated on a gasket, and the gasket is seated on a shoulder of a cylindrical cavity in the upper joint and is pressed and positioned by a male thread end of a drill collar or a drill rod.

Preferably, the inner cylinder seat is hung on a boss in the outer cylinder and is pressed and positioned by the male thread of the upper connector.

Preferably, the inside of the upper joint is a cylindrical cavity with a shoulder, the bottom of the cylindrical cavity is guided into an outwardly expanding conical cavity, and the bottom of the upper joint is a threaded connection end.

Preferably, the outer cylinder is a thin-wall pipe fitting, the top end and the bottom end of the outer cylinder are both threaded connection ends, a boss is arranged at the bottom of the top thread of the outer cylinder and used for hanging the inner cylinder on a seat, and the inner cavity of the outer cylinder at the bottom of the boss is a hammer body cavity.

Preferably, a spray bearing cavity, a buffer hole, a valve core cavity, a valve rod cavity and a piston cavity are sequentially arranged in the inner cylinder from the top end to the bottom end along the axis of the body, an inclined hole and a variable flow cavity are arranged on the cylinder wall of the inner cylinder along the circumferential direction, the spray bearing cavity and the valve core cavity have the same diameter, the diameter of the buffer hole is larger than that of the spray bearing cavity, the diameter of the valve rod cavity is smaller than that of the valve core cavity, the diameter of the piston cavity is larger than that of the buffer hole, the inclined holes and the variable flow cavities are the same in number and are respectively 2-4, and are symmetrically distributed in a staggered mode along the circumferential direction of the inner cylinder body, the inclined holes are communicated with the buffer hole and the valve core cavity, and the variable flow cavity is a straight groove with an arc-shaped cross section and is only communicated with the piston cavity.

Preferably, the core valve is respectively provided with a conical solid diversion cone, a cylindrical solid valve core and a cylindrical solid valve rod from the top end to the bottom end, the valve rod is provided with a throttling seam, and the bottom end of the valve rod is in a spherical crown shape.

Preferably, the impact hammer is respectively provided with a cylindrical solid piston and a hammer body from the top end to the bottom end, the diameter of the piston is smaller than that of the hammer body, piston grooves are axially distributed on the piston, hammer grooves are circumferentially distributed on the hammer body, the piston grooves and the hammer grooves are straight grooves with arc-shaped cross sections, the piston grooves are half grooves for opening the top end of the hammer body, the hammer grooves are through grooves for opening the bottom end of the hammer body, and the bottom end of the hammer body is in a spherical crown shape.

The utility model discloses following beneficial technological effect has been gained for prior art:

the utility model provides a passive valve type hydraulic down-the-hole hammer, under the condition that the heart valve is blocked, the punch hammer goes up to quickly strike the valve rod to help the heart valve to be unlocked; the rigid counter blow of the impact hammer can be completely eliminated; the pump capacity for ensuring the normal work of the impact hammer can be adjusted in a large range by changing the diameter of the jet hole of the nozzle; the stroke of the impact hammer can be changed by changing the length of the valve rod, so that the impact frequency and the impact power of the impact hammer are adjusted; simple structure, processing is convenient, cost of manufacture greatly reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a hydraulic hammer state under a drilling condition under the condition of a passive valve type hydraulic down-the-hole hammer of the present invention, wherein, a drawing (a) and a drawing (b) are respectively a front sectional view and a left sectional view;

fig. 2 is a schematic structural view of the hydraulic hammer of the passive valve type hydraulic down-the-hole hammer in the initial working state of the present invention, wherein, fig. (a) and fig. (b) are respectively a front sectional view and a left sectional view;

fig. 3 is a schematic structural view of the state that the core valve and the hammer of the passive valve type hydraulic down-the-hole hammer of the present invention reach the top dead center and start to move downwards, wherein, the front sectional view and the left sectional view of the drawing (a) and the drawing (b) are respectively a front sectional view and a left sectional view;

FIG. 4 is a schematic view showing an assembled structure of the upper joint and the nozzle and the gasket;

FIG. 5 is a front sectional view of the inner cylinder shown in FIG. (a);

FIG. 5 is a sectional view taken along line A-A of FIG. 5;

FIG. 5 is a view in section along the line B of FIG. 5;

FIG. 6 is a schematic structural view of a core valve;

FIG. 7 is a schematic view of the structure of the hammer punch (a);

FIG. 7 is a view in the direction C of FIG. (a);

FIG. 8 is a schematic structural view of the outer cylinder;

FIG. 9 is a schematic structural view of a half-closed hoop;

FIG. 10 is a schematic view of the structure of the square sleeve;

FIG. 10 (b) is a view from FIG. (a) in the direction D;

FIG. 11 is a schematic view of the anvil structure (a);

fig. 11 (b) is a view in the direction C of fig. (a).

In the figure: 1. the hydraulic jet engine comprises an upper connector, 1-1 parts of a cylindrical cavity, 1-2 parts of a conical cavity, 2 parts of a nozzle, 2-1 parts of a convergent cavity, 2-2 parts of a jet hole, 3 parts of an inner cylinder, 3-1 parts of a spray bearing cavity, 3-2 parts of a buffer hole, 3-3 parts of an inclined hole, 3-4 parts of a variable flow cavity, 3-5 parts of a valve core cavity, 3-6 parts of a valve rod cavity, 3-7 parts of a piston cavity, 4 parts of a core valve, 4-1 parts of a guide cone, 4-2 parts of a valve core, 4-3 parts of a throttling seam, 4-4 parts of a valve rod, 5 parts of an outer cylinder, 5-1 parts of a boss, 5-2 parts of a hammer body cavity, 6 parts of a punching hammer, 6-1 parts of a piston groove, 6-2 parts of a piston, 6-3 parts of a hammer body, 6-4 parts of a hammer groove, 7 parts of a half-closed hoop, 8 parts of a square sleeve, 8-1 parts of a neck cavity, 8-2 parts of a piston groove, and a half-closed hoop, Square cavity, 9, anvil, 9-1, hoop groove, 9-2, shaft neck, 9-3, shaft square, 9-4, inclined hole, 9-5, straight hole, 10 and gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model aims at providing a passive valve formula down-the-hole hammer that surges to solve the problem that prior art exists.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

The passive valve type hydraulic down-the-hole hammer in the embodiment comprises an upper connector 1, a nozzle 2, an inner cylinder 3, a core valve 4, an outer cylinder 5, a hammer 6, a half-closed hoop 7, a square sleeve 8, an anvil 9 and a gasket 10, wherein the upper connector 1, the nozzle 2, the inner cylinder 3, the outer cylinder 5 and the square sleeve 8 are all of a hollow structure, the bottom of the upper connector 1 is in threaded connection with the top of the outer cylinder 5, the gasket 10 is arranged on a shoulder of a cylindrical cavity 1-1 in the upper connector 1, the nozzle 2 is arranged on the gasket 10 and is pressed and positioned by a male thread end of a drill collar or a drill rod (not shown in the figure), the inner cylinder 3 is arranged at the bottom of the nozzle 2, the inner cylinder 3 is hung on a boss 5-1 in the outer cylinder 5 and is pressed and positioned by the male thread of the upper connector 1, a valve core 4-2 and a valve rod 4-4 of the core 4 are respectively inserted into a valve core cavity 3-5 and a valve rod cavity 3-6 of the inner cylinder 3, the bottom end of the inner cylinder is provided with piston cavities 3-7, the impact hammer 6 is arranged at the bottom of the inner cylinder 3, a piston 6-2 and a hammer body 6-3 of the impact hammer 6 are respectively inserted into the piston cavity 3-7 of the inner cylinder 3 and the hammer body cavity 5-2 of the outer cylinder 5, the bottom of the outer cylinder 5 is in threaded connection with a square sleeve 8 (shown in figure 10), a shaft neck 9-2 and a shaft square 9-3 of an anvil 9 (shown in figure 11) are respectively inserted into the neck cavity 8-1 and the square cavity 8-2 of the square sleeve 8, a hoop groove 9-1 is arranged on the shaft neck 9-2 of the square sleeve 8, two half hoops 7 (shown in figure 9) are clamped into the hoop groove 9-1, and the outer diameter of each half hoop 7 is the same as that of the hammer body cavity 5-2 of the outer cylinder 5.

As shown in fig. 4, the interior of the upper joint 1 is a cylindrical cavity 1-1 with a shoulder, the bottom of the cylindrical cavity 1-1 is led into an outwardly expanding conical cavity 1-2, and the bottom of the upper joint 1 is a threaded connection end; the top end of the interior of the nozzle 2 is a convergent cavity 2-1 with gradually reduced diameter, and the bottom end is a cylindrical jet hole 2-2.

As shown in fig. 8, the outer cylinder 5 is a thin-wall pipe, the top end and the bottom end of the outer cylinder 5 are both threaded connection ends, the bottom of the top thread of the outer cylinder 5 is provided with a boss 5-1, the boss 5-1 is used for hanging the inner cylinder, and the inner cavity of the outer cylinder 5 at the bottom of the boss 5-1 is a hammer body cavity 5-2.

As shown in figure 5, a spray bearing cavity 3-1, a buffer hole 3-2, a valve core cavity 3-5, a valve rod cavity 3-6 and a piston cavity 3-7 are sequentially arranged in the inner cylinder 3 from the top end to the bottom end along the axis of the body, an inclined hole 3-3 and a variable flow cavity 3-4 are arranged on the cylinder wall of the inner cylinder along the circumferential direction, the spray bearing cavity 3-1 and the valve core cavity 3-5 have the same diameter, the diameter of the buffer hole 3-2 is larger than that of the spray bearing cavity 3-1, the diameter of the valve rod cavity 3-6 is smaller than that of the valve core cavity 3-5, the diameter of the piston cavity 3-7 is larger than that of the buffer hole 3-2, the inclined hole 3-3 and the variable flow cavity 3-4 are symmetrically distributed along the circumferential direction of the body of the inner cylinder 3 in a staggered manner, the number of each inclined hole is 2-4, the inclined hole 3-3 is communicated with the buffer hole 3-2 and the valve core 4-2 cavity 3-5, the variable flow cavity 3-4 is an arc-shaped groove and is only communicated with the piston cavity 3-7.

As shown in fig. 6, the core valve 4 is respectively provided with a conical solid diversion cone 4-1, a cylindrical solid valve core 4-2 and a cylindrical solid valve rod 4-4 from the top end to the bottom end, a throttling seam 4-3 is arranged on the valve rod 4-4, and the bottom end of the valve rod 4-4 is in a spherical crown shape; the core valve 4 is connected with the valve cavity of the inner cylinder 3 in a sliding fit manner, the piston 6-2 of the impact hammer 6 is connected with the cavity 3-7 of the piston 6-2 of the inner cylinder 3, the hammer body 6-3 of the impact hammer 6 is connected with the cavity 5-2 of the hammer body 6-3 of the outer cylinder 5, the square sleeve 8 is connected with the anvil 9, and the half-closed hoop 7 is connected with the cavity 5-2 of the hammer body 6-3 of the outer cylinder 5 in a sliding fit manner.

As shown in figure 7, the free top end to the bottom end of the impact hammer 6 are respectively a cylindrical solid piston 6-2 and a hammer body 6-3, the diameter of the piston 6-2 is smaller than that of the hammer body 6-3, a piston groove 6-1 is axially distributed on the piston 6-2, a hammer groove 6-4 is circumferentially distributed on the hammer body 6-3, the piston groove 6-1 and the hammer groove 6-4 are both arc grooves with arc-shaped cross sections, the piston groove 6-1 is a half groove for opening the top end of the hammer body 6-3, the hammer groove 6-4 is a through groove for opening the bottom end of the hammer body 6-3, and the bottom end of the hammer body 6-3 is in a spherical crown shape.

Fig. 1 shows the state of the hydraulic hammer in the drilling situation:

the anvil 9, the hammer 6 and the core valve 4 are all in the lower limit position, and part of the piston groove 6-1 of the hammer 6 is exposed out of the piston cavity 3-7 of the inner cylinder 3. At the moment, drilling fluid is pumped, a part of the liquid ejected from the jet hole 2-2 of the nozzle 2 is directly ejected into the ejection bearing cavity 3-1 of the inner cylinder 3 and enters the outer cylinder 5 from the inclined hole 3-3, a part of the liquid is ejected from the conical cavity 1-2 of the upper joint 1 and enters the outer cylinder 5 through the variable flow cavity 3-4 of the inner cylinder 3, the piston cavity 3-7 and the piston groove 6-1 of the impact hammer 6, and the liquid of the outer cylinder 5 is converged in the straight hole 9-5 through the inclined hole 9-4 of the anvil 9 and is discharged out of the hydraulic hammer. In this state, the pressures at the upper end and the lower end of the hammer 6 are basically balanced, and the hydraulic hammer does not work.

Fig. 2 shows the initial state of the hydraulic hammer:

the anvil 9 reaches an upward dead point and pushes the piston groove 6-1 of the impact hammer 6 to completely enter the piston cavity 3-7 of the inner cylinder 3, the liquid flow is discharged into the water path of the outer cylinder 5 through the piston groove 6-1 and is closed, the liquid in the piston cavity 3-7 and the variable flow cavity 3-4 flows back upwards due to the negative pressure caused in the conical cavity 1-2 of the upper joint 1 by the high-speed liquid flow ejected from the jet hole 2-2, and is converged with the liquid in the conical cavity 1-2 and discharged from the inclined hole 3-3 of the inner cylinder 3 to the outer cylinder 5, the impact hammer 6 starts to move upwards, and pushes the core valve 4 to move upwards after contacting with the valve rod 4-4 of the core valve 4.

Fig. 3 shows a state where the heart valve 4 and the hammer punch 6 reach the top dead center and start moving downward:

the large-diameter high-speed guide cone 4-1 of the core valve 4 is in contact with a spray bearing cavity 3-1 of the inner cylinder 3 through a buffer hole 3-2 of the inner cylinder 3, a drilling fluid descending channel is cut off rapidly to cause the pressure of liquid in the spray bearing cavity 3-1, a variable flow cavity 3-4 and cavities above the variable flow cavity to rise rapidly, liquid flow changes direction in the variable flow cavity 3-4 of the inner cylinder 3 to push a piston 6-2 of the impact hammer 6 to descend, the core valve 4 in the spray bearing cavity 3-1 descends under the action of high-pressure liquid flow in the spray bearing cavity 3-1 at the same time until the hammer body 6-3 is blocked by an anvil 9 to form hammering, and the hydraulic hammer returns to the state shown in figure 2 to start the next round of reciprocating work.

The utility model discloses the principle and the implementation mode of the utility model are explained by applying the concrete examples, and the explanation of the above examples is only used for helping to understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present description should not be construed as a limitation of the present invention.

Claims (9)

1. A passive valve type hydraulic down-the-hole hammer is characterized in that: the punching hammer comprises an upper connector, a nozzle, a gasket, an inner cylinder, a core valve, an outer cylinder, a punching hammer, a half-closed hoop, a square sleeve and a hammering block, wherein the upper connector, the nozzle, the inner cylinder, the outer cylinder and the square sleeve are all of hollow structures, the bottom of the upper connector is connected with the top of the outer cylinder, the nozzle and the gasket are arranged in the upper connector, the inner cylinder is arranged at the bottom of the nozzle and is positioned in the outer cylinder, a valve core and a valve rod of the core valve are respectively inserted into a valve core cavity and a valve rod cavity of the inner cylinder, the bottom of the inner cylinder is a piston cavity, the punching hammer is arranged at the bottom of the inner cylinder, a piston and a hammer body of the punching hammer are respectively inserted into the piston cavity of the inner cylinder and the hammer body cavity of the outer cylinder, the bottom of the outer cylinder is connected with the square sleeve, a shaft neck and a shaft of the hammering block are respectively inserted into the neck cavity and the square cavity of the square sleeve, and a hoop groove is arranged on the shaft neck of the square sleeve, two half-closed hoops are clamped into the hoop grooves, and the outer diameter of each half-closed hoop is the same as the diameter of the hammer cavity of the outer cylinder.

2. A passive valve-type hydraulic down-the-hole hammer as set forth in claim 1, wherein: the bottom of the upper joint is in threaded connection with the top of the outer cylinder, and the bottom of the outer cylinder is in threaded connection with the square sleeve.

3. A passive valve-type hydraulic down-the-hole hammer as set forth in claim 1, wherein: the nozzle seat is arranged on the gasket, the gasket seat is arranged on the shoulder of the cylindrical cavity in the upper joint, and the gasket seat is pressed and positioned by the male thread end of the drill collar or the drill rod.

4. A passive valve-type hydraulic down-the-hole hammer as set forth in claim 1, wherein: the inner cylinder seat is hung on a boss in the outer cylinder and is pressed and positioned by the male thread of the upper joint.

5. A passive valve-type hydraulic down-the-hole hammer as set forth in claim 1, wherein: the inner part of the upper joint is a cylindrical cavity with a shoulder, the bottom of the cylindrical cavity is guided into an outwardly expanded conical cavity, and the bottom of the upper joint is a threaded connection end.

6. A passive valve-type hydraulic down-the-hole hammer as set forth in claim 1, wherein: the outer cylinder is a thin-wall pipe fitting, the top end and the bottom end of the outer cylinder are threaded connection ends, a boss is arranged at the bottom of a top thread of the outer cylinder and used for hanging the inner cylinder, and an inner cavity of the outer cylinder at the bottom of the boss is a hammer body cavity.

7. A passive valve-type hydraulic down-the-hole hammer as set forth in claim 1, wherein: the inner cylinder is internally provided with a spray bearing cavity, a buffer hole, a valve core cavity, a valve rod cavity and a piston cavity in sequence from the top end to the bottom end along the axis of the body, the cylinder wall of the inner cylinder is provided with an inclined hole and a variable flow cavity along the circumferential direction, the spray bearing cavity and the valve core cavity have the same diameter, the diameter of the buffer hole is larger than that of the spray bearing cavity, the diameter of the valve rod cavity is smaller than that of the valve core cavity, the diameter of the piston cavity is larger than that of the buffer hole, the inclined hole and the variable flow cavities are the same in number and are respectively 2-4, and are symmetrically distributed in a staggered mode along the circumferential direction of the inner cylinder body, the inclined hole is communicated with the buffer hole and the valve core cavity, and the variable flow cavity is a straight groove with an arc-shaped cross section and is only communicated with the piston cavity.

8. A passive valve-type hydraulic down-the-hole hammer as set forth in claim 1, wherein: the core valve is provided with a conical solid diversion cone, a cylindrical solid valve core and a cylindrical solid valve rod from the top end to the bottom end respectively, a throttling seam is arranged on the valve rod, and the bottom end of the valve rod is in a spherical crown shape.

9. A passive valve-type hydraulic down-the-hole hammer as set forth in claim 1, wherein: the punching hammer is characterized in that a cylindrical solid piston and a hammer body are respectively arranged from the top end to the bottom end, the diameter of the piston is smaller than that of the hammer body, conical surface transition is formed between the piston and the hammer body, piston grooves are distributed in the piston along the circumferential direction, hammer grooves are distributed in the hammer body along the circumferential direction, the piston grooves and the hammer grooves are straight grooves with arc-shaped cross sections, the piston grooves are half grooves formed in the top end of the hammer body, the hammer grooves are through grooves formed in the bottom end of the hammer body, and the bottom end of the hammer body is in a spherical crown shape.

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