CN216110508U

CN216110508U - Full-hydraulic variable-frequency rock drill controlled by external valve

Info

Publication number: CN216110508U
Application number: CN202122020305.7U
Authority: CN
Inventors: 阎季常; 马京会
Original assignee: Wuxi Guangtai Rock Drilling Equipment Co ltd
Current assignee: Wuxi Guangtai Rock Drilling Equipment Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-03-22
Anticipated expiration: 2031-08-25

Abstract

The utility model provides an external valve controlled full hydraulic variable frequency rock drill, which comprises an impact hammer, a gear box, a slag discharge seat and a drill bit tail which are sequentially connected, wherein a rotary motor is arranged on the gear box, the impact hammer comprises an impact cylinder and an impact piston, a cavity is arranged in the impact cylinder, the impact piston is arranged in the cavity in a sliding mode and is divided into a front cavity and a rear cavity, the rock drill further comprises a hydraulic reversing valve and a variable frequency component, the hydraulic control valve can control the principle that both the front cavity and the rear cavity can return oil, large hydraulic pressure difference is generated, the utilization rate of hydraulic power is effectively improved, meanwhile, an oil duct arranged in the variable frequency component has a variable frequency function, and under the condition that the impact power is not changed, high-frequency low-impact power and low-frequency high-impact power are realized, so that the rock drill is suitable for different working conditions, and the working efficiency of the rock drill is effectively improved.

Description

Full-hydraulic variable-frequency rock drill controlled by external valve

Technical Field

The utility model relates to a rock drill, in particular to a full-hydraulic variable-frequency rock drill controlled by an external valve.

Background

Rock drills, which are tools for directly quarrying stone, drill holes are drilled in rock strata so as to put explosive to explode the rock, thereby completing quarrying stone or other stone engineering.

The impact hammer of the existing hydraulic rock drill adopts a single oil cavity to return oil to generate pressure difference to drive an impact piston to work, the generated impact energy is less, the utilization rate of hydraulic power is lower, the impact frequency of the impact hammer is fixed and is difficult to adapt to different working conditions, and the working efficiency of the rock drill is lower.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the utility model provides a full-hydraulic variable-frequency rock drill controlled by an external valve, which solves the problems that an impact hammer of the existing hydraulic rock drill adopts oil return of a single oil cavity to generate pressure difference to drive an impact piston to work, the generated impact energy is less, the utilization rate of hydraulic power is lower, the impact frequency of the impact hammer is fixed and is difficult to adapt to different working conditions, and the working efficiency of the rock drill is too low.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides an outer valve control's full-hydraulic variable frequency rock drill, is including the jump bit, gear box, row's sediment seat and the bore bit tail that connect gradually, install rotary motor on the gear box, the jump bit includes strikes jar and impact piston, be equipped with the cavity in the impact jar, the impact piston slides and sets up in the cavity, still include hydraulic pressure switching-over valve and frequency conversion subassembly, the hydraulic pressure switching-over valve is used for controlling the impact piston is in strike jar interior side-to-side movement, the frequency conversion subassembly is used for controlling the impact piston is in strike the frequency of jar interior motion.

Further: the frequency conversion assembly is a plurality of oil ducts, the oil ducts are sequentially arranged and axially arranged on the impact cylinder, one end of each oil duct is communicated with the cavity, and the other end of each oil duct is connected with the left control path of the hydraulic reversing valve.

Further: be equipped with first oil groove, first oil groove and third oil groove on the inner wall of impact jar, hydraulic reversing valve is equipped with oil feed P mouth, oil return T mouth, A mouth and B mouth, first oil groove with the A mouth is connected, first oil groove with the B mouth is connected, the third oil groove with the right side of hydraulic reversing valve is controlled the way and is connected.

Further: the impact piston divides the cavity into a front cavity and a rear cavity, the front cavity is communicated with the first oil groove, and the rear cavity is communicated with the second oil groove.

Further: and plugs are arranged in the oil ducts.

Further: and the impact hammer is provided with a low-pressure energy accumulator and a high-pressure energy accumulator.

The utility model has the advantages that the outer valve controlled full-hydraulic variable frequency rock drill can generate larger hydraulic pressure difference during working by arranging the front cavity and the rear cavity between the impact cylinder and the impact piston according to the principle that the hydraulic control valve can control the front cavity and the rear cavity to return oil, thereby effectively improving the utilization rate of hydraulic power, and simultaneously realizing high-frequency low-impact power and low-frequency high-impact power by the variable frequency function provided by the oil duct in the variable frequency component under the condition of unchanged impact power so as to adapt to different working conditions and effectively improve the working efficiency of the rock drill.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a general schematic view of an external valve controlled full hydraulic variable frequency rock drill of the present invention;

fig. 2 is a working principle diagram of the impact hammer and the hydraulic reversing valve.

In the figure, the hydraulic hammer comprises an impact hammer body 1, an impact hammer body 2, a gear box body 3, a slag discharging seat 4, a drill shank 5, a rotary motor 6, an impact cylinder 7, an impact piston 8, a hydraulic reversing valve 9, an oil duct 10, a first oil groove 11, a second oil groove 12, a third oil groove 13, a front cavity 14, a rear cavity 15, a low-pressure accumulator 16 and a high-pressure accumulator.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. On the contrary, the embodiments of the utility model include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

As shown in fig. 1 and 2, the utility model provides an external valve controlled full hydraulic variable frequency rock drill, which comprises an impact hammer 1, a gear box 2, a slag discharging seat 3 and a drill shank 4 which are connected in sequence, wherein a rotary motor 5 is installed on the gear box 2, the impact hammer 1 comprises an impact cylinder 6 and an impact piston 7, a cavity is arranged in the impact cylinder 6, the impact piston 7 is arranged in the cavity in a sliding manner, the utility model further comprises a hydraulic reversing valve 8 and a variable frequency assembly, the hydraulic reversing valve 8 is used for controlling the impact piston 7 to move left and right in the impact cylinder 6, and the variable frequency assembly is used for controlling the frequency of the impact piston 7 moving in the impact cylinder 6.

The rock drill of the device has compact structure, light weight and reasonable layout structure, and has the functions of controlling the impact piston 7 to strike the drill rod through the hydraulic reversing valve 8, driving the drill rod 4, the drill rod and the drill bit to rotate through the gear box 2 by the hydraulic motor, then enabling the drill bit to contact with the rock to crush the rock into small stones, and then discharging the rocks in the holes through the slag discharging seat 3 by compressed air or water; meanwhile, frequency conversion is realized through the frequency conversion assembly, and under the condition that the impact power is not changed, high-frequency low impact power and low-frequency high impact power are realized, so that the working efficiency under different working conditions is effectively improved.

The frequency conversion assembly is a plurality of oil ducts 9, the oil ducts 9 are sequentially arranged and axially arranged on the impact cylinder 6, one end of each oil duct 9 is communicated with the cavity, and the other end of each oil duct 9 is connected with the left control path of the hydraulic reversing valve 8.

When the impact piston 7 returns, the right position of the hydraulic reversing valve 8 is connected, the rear cavity 14 is decompressed, the front cavity 13 generates pressure to drive the impact piston 7 to move rightwards, when the impact piston 7 moves rightwards and the frequency conversion assembly is communicated with the first oil groove 10 through the front cavity 13, hydraulic oil enters the oil duct 9 and generates pressure, the pressure is applied to the hydraulic reversing valve 8, the left position of the hydraulic reversing valve is connected, the front cavity 13 is decompressed, the rear cavity 14 drives the impact piston 7 to move leftwards, as the oil ducts 9 are sequentially arranged on the impact cylinder 6 along the axial direction, when each oil duct 9 is communicated with the front cavity 13, the distance of the impact piston 7 moving rightwards is different, namely when the oil duct 9 on the left side in the frequency conversion assembly is communicated with the front cavity 13, the distance of the impact piston 7 moving is short, when the oil duct 9 on the right side is communicated with the front cavity 13, the distance of the impact piston 7 moving is long, under the condition that the impact power is not changed, the shorter the distance of the movement of the percussion piston 7, the faster the percussion frequency; when the distance of the impact piston 7 is longer, the impact frequency is slower so as to adapt to different working conditions, and the working efficiency under different working conditions is effectively improved.

Be equipped with first oil groove 10, second oil groove 11 and third oil groove 12 on the inner wall of impact jar 6, hydraulic pressure switching-over valve 8 is equipped with oil feed P mouth, oil return T mouth, A mouth and B mouth, first oil groove 10 with the A mouth is connected, second oil groove 11 with the B mouth is connected, third oil groove 12 with hydraulic pressure switching-over valve 8's right side is controlled the way and is connected.

The impact piston 7 divides the cavity into a front cavity 13 and a rear cavity 14, the front cavity 13 is communicated with the first oil groove 10, and the rear cavity 14 is communicated with the second oil groove 11.

When the hydraulic reversing valve starts to work, the hydraulic reversing valve 8 is connected in the right position, hydraulic oil enters the front cavity 13 through the oil inlet P, the port A and the first oil groove 10 in sequence, the acting force of the hydraulic oil in the front cavity 13 on the impact piston 7 is rightward, the oil return T port is communicated with the port B, the port B is communicated with the rear cavity 14 through the second oil groove 11, the rear cavity 14 is decompressed, and the front cavity 13 and the rear cavity 14 generate pressure difference to drive the impact piston 7 to move rightwards to lift the rod.

When the impact piston 7 moves rightwards to enable the oil ducts 9 to be communicated with the front cavity 13, hydraulic oil in the front cavity 13 enters the oil ducts 9 to generate pressure to enable the left position of the hydraulic reversing valve 8 to be connected, the oil inlet P is communicated with the port B, hydraulic oil enters the rear cavity 14 through the second oil groove 11, the acting force of the hydraulic oil in the front cavity 13 on the impact piston 7 is leftward, the oil return T is communicated with the port A, the port A is communicated with the front cavity 13 through the first oil groove 10 to enable the front cavity 13 to be decompressed, and pressure difference generated between the front cavity 13 and the rear cavity 14 drives the impact piston 7 to move leftwards to impact.

When the impact piston 7 moves to the leftmost end, the rear cavity 14 is communicated with the third oil groove 12, pressure is generated on a right control path of the hydraulic reversing valve 8, so that the right position of the hydraulic reversing valve 8 is connected, return stroke is started, and the lifting rod is repeatedly lifted.

Plugs are arranged in the oil ducts 9 and used for plugging other oil ducts 9, and the oil ducts 9 required under specific working conditions are selected.

The impact hammer 1 is provided with the low-pressure energy accumulator 15 and the high-pressure energy accumulator 16, so that pressure fluctuation in the impact process can be effectively reduced, and meanwhile, the oil supplementing process is carried out on insufficient flow in the impact process, so that the impact frequency is improved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The full-hydraulic variable-frequency rock drill controlled by the external valve comprises an impact hammer (1), a gear box (2), a slag discharge seat (3) and a drill shank (4) which are sequentially connected, wherein a rotary motor (5) is installed on the gear box (2), the impact hammer (1) comprises an impact cylinder (6) and an impact piston (7), a cavity is arranged in the impact cylinder (6), the impact piston (7) is arranged in the cavity in a sliding mode, the full-hydraulic variable-frequency rock drill is characterized by further comprising a hydraulic reversing valve (8) and a variable-frequency assembly, the hydraulic reversing valve (8) is used for controlling the impact piston (7) to move left and right in the impact cylinder (6), and the variable-frequency assembly is used for controlling the frequency of the impact piston (7) moving in the impact cylinder (6).

2. The full hydraulic variable frequency rock drill controlled by the external valve is characterized in that the variable frequency component is a plurality of oil passages (9), the oil passages (9) are sequentially arranged and axially arranged on the impact cylinder (6), one ends of the oil passages (9) are communicated with the cavity, and the other ends of the oil passages are connected with a left control path of the hydraulic directional valve (8).

3. The full-hydraulic variable-frequency rock drill controlled by the external valve is characterized in that a first oil groove (10), a second oil groove (11) and a third oil groove (12) are formed in the inner wall of the impact cylinder (6), the hydraulic reversing valve (8) is provided with an oil inlet P, an oil return T, an A and a B, the first oil groove (10) is connected with the A, the second oil groove (11) is connected with the B, and the third oil groove (12) is connected with a right control path of the hydraulic reversing valve (8).

4. An external valve controlled full hydraulic variable frequency rock drill according to claim 3 characterized in that said impact piston (7) divides said chamber into a front chamber (13) and a rear chamber (14), said front chamber (13) communicating with said first oil sump (10) and said rear chamber (14) communicating with said second oil sump (11).

5. An external valve controlled full hydraulic frequency conversion rock drill according to claim 2 characterized in that plugs are provided in a plurality of said oil passages (9).

6. An external valve controlled full hydraulic variable frequency rock drill according to claim 1 characterized in that the impact hammer (1) is provided with a low pressure accumulator (15) and a high pressure accumulator (16).