Improved heavy impact hammer

Abstract

The application discloses an improved heavy impact hammer which comprises a front cylinder body, a main sleeve, an oil cylinder cover, an accumulator cover, an accumulator, an oil cylinder and a piston assembly, a stroke sensing switch, a double-way electromagnetic valve and a touch screen, an inner sleeve and an outer sleeve are coaxially sleeved and stacked in the front cylinder body, a damping block, a flat pin and a drill rod are arranged in the front cylinder body, the drill rod is fixedly connected to the lower portion of the outer sleeve, a hammer head is sleeved in the main sleeve, the piston assembly is arranged in the hammer head, a striking head is fixedly connected to the lower portion of the hammer head, the piston assembly comprises a piston and a piston rod, the piston rod is fixedly connected to the striking head, the accumulator is connected to the upper end of the oil cylinder through a gasket and an ACC fixed flange, the improved heavy impact hammer can independently and synchronously control the flow and closing of high-pressure oil through the double-way electromagnetic valve, the striking force can be adjusted, the stroke sensing switch is designed on the oil cylinder, the touch screen of the breaking hammer is arranged, position signals are collected and transmitted to the touch screen, the breaking hammer is controlled, the striking force is increased or reduced, intelligent control is realized, and the improved heavy impact hammer is high in efficiency and safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic equipment, in particular to a mine exploitation impact hammer, and more particularly to a new design heavy impact breaking hammer, which is applied to mine exploitation, secondary breaking, building demolition, tunnel construction, piling construction and the like. BACKGROUND

[0002] The hydraulic breaking hammer is a mechanical tool capable of converting hydraulic energy into mechanical energy to do work, and is a special machine tool. The hydraulic breaking hammer is often installed at the front end of an excavator or a loader, and is used for rock breaking, mine exploitation, building demolition, hard layer excavation and the like.

[0003] The working principle of the traditional hydraulic breaking hammer is as follows:

[0004] The traditional hydraulic breaking hammer comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a reversing valve, a piston, a drill rod, an accumulator and the like. The middle cylinder body is an important component, and its upper and lower ends are connected with the rear cylinder body and the front cylinder body respectively. The drill rod is arranged on the front cylinder body. The reversing valve and the accumulator are arranged on the middle cylinder body, and an oil inlet passage and an oil return passage are also arranged on the middle cylinder body. The front working chamber and the rear working chamber are arranged between the middle cylinder body and the piston. When the piston is at the upper top end, the downward force is greater than the upward force due to the fact that the acting area of the hydraulic oil in the rear working chamber of the piston is greater than that of the front working chamber. Under the dual action of the hydraulic pressure and the nitrogen pressure in the accumulator, the piston moves downward to strike the drill rod. The drill rod strikes the rock. After the piston strikes, the piston starts to move upward. At this time, the reversing valve is at the lower limit position. The front working chamber of the piston communicates with the high-pressure oil of the oil inlet passage through the reversing valve, and the rear working chamber of the piston communicates with the oil return passage through the reversing valve to flow back to the hydraulic oil tank. Therefore, the piston moves upward at high speed under the action of the high-pressure oil in the front working chamber, and at the same time, the nitrogen in the tail nitrogen chamber is compressed to store energy. When the piston rises to a certain position, the reversing valve is reversed to allow the high-pressure oil to enter the rear working chamber. In this structure, the piston reciprocates to drive the drill rod to continuously work.

[0005] The working deficiencies of the traditional hydraulic breaking hammer are as follows:

[0006] 1. The striking force is small and the efficiency is low: the reversing valve, the oil inlet and oil return pipeline are fixed, and the piston stroke is fixed. This causes the striking force to be unadjustable. When hard rock is encountered, the yield rapidly decreases. When particularly hard rock is encountered, there is no way to work. Some customers can only use larger breaking hammers matched with excavators, which causes small vehicles to pull large vehicles and continuously increases the purchase cost of customers.

[0007] 2. Cannot be obliquely struck, and the work is limited: in actual operation, the working surface is not flat and standard. The traditional breaking hammer cannot be obliquely struck. Oblique striking easily leads to excessive radial force on the components and early damage. If the driver forcibly and even for a long time obliquely strikes, the breaking hammer is easily damaged.

[0008] 3. Vibration is large, and is easily damaged to the excavator: the traditional breaking hammer is divided into straight hammer and triangular hammer. The connection part with the excavator is at the top of the straight hammer and the top side of the triangular hammer. These parts are large in vibration sensing and large in power transmission to the excavator, and are easily damaged to the mechanical parts and hydraulic system. In order to avoid the damage of vibration force, the excavator increases the thickness of the boom and arm, increases the weight of the excavator body, increases the pipeline strength, and adds rubber pipe clamp to the pipeline to reduce vibration wear, etc. In fact, all of these cause the cost of excavator manufacturing to increase. SUMMARY

[0009] The purpose of the present application is: in view of the problem of insufficient work of the traditional hydraulic breaking hammer in the background art, an improved heavy impact hammer is designed to improve the striking force and efficiency, and to ensure that the oblique hitting can be performed for a long time and the vibration damage to the excavator is minimized.

[0010] The technical scheme adopted to solve the above problems is:

[0011] An improved heavy impact hammer, comprising a front cylinder body, a main sleeve, an oil cylinder cover, an accumulator cover, an accumulator, an oil cylinder and a piston assembly, a stroke sensing switch for controlling the stroke position of the oil cylinder, a double-way electromagnetic valve for controlling the on-off of high-pressure oil, and a touch screen for displaying the oil cylinder position signal,

[0012] The front cylinder body is provided with an inner sleeve, an outer sleeve, a damping block, a flat pin and a drill rod, and a first head cover is fixedly connected to the outer side. The inner sleeve and the outer sleeve are coaxially sleeved and stacked, the drill rod is fixedly connected to the lower part of the outer sleeve, the damping block is arranged on the upper end face of the inner sleeve, and the drill rod is subjected to impact force by the striking head in the main sleeve and buffers the inertia generated by instantaneous impact. The flat pin is radially sleeved on the outer side wall of the front cylinder body and clamps and limits the platform surface of the drill rod. The main sleeve is fixedly connected to the upper part of the front cylinder body by bolts,

[0013] The main sleeve is sleeved with a hammer head, the outer circle of the hammer head is provided with a high-force brass support ring which is in sliding cooperation with the inner wall of the main sleeve to reduce wear, the inner hole of the hammer head is provided with a piston assembly, the lower part of the hammer head is fixedly connected with a striking head, and the outer wall of the main sleeve is fixedly connected with a second head cover,

[0014] The piston assembly comprises a piston and a piston rod. The piston is in close cooperation with the inner wall of the oil cylinder. After the lower end of the piston rod passes through the center hole of the hammer head, the piston rod is fixedly connected with the striking head by screwing a cap,

[0015] The oil cylinder is arranged in the oil cylinder cover. The upper end of the oil cylinder is also connected with the accumulator through a gasket and an ACC fixed flange. The accumulator is provided with a nitrogen chamber and maintains sufficient nitrogen storage. The outer circle of the accumulator is also sleeved with an accumulator cover,

[0016] The stroke sensing switch is arranged at one side of the stroke position of the piston rod according to the impact force required by the drill rod at a reasonable interval, and the position information of the piston rod is obtained by cooperating with the touch screen, and according to the strength and frequency required by the actual impact surface, the touch screen is manually controlled to select the appropriate impact stroke for the piston rod, so as to adjust the impact force and impact frequency of the impact hammer.

[0017] Further, the double-way electromagnetic valve can independently or synchronously give the oil cylinder to flow high-pressure oil, the size of the striking force can be adjusted, the most suitable striking force is selected according to different working conditions, and the efficiency is higher.

[0018] Further, the accumulator guard is fixed on the upper end face of the oil cylinder guard through bolts, and the oil cylinder guard is fixed on the upper end face of the main sleeve through bolts.

[0019] Further, the first head cover is provided with an upper hinge hole and a middle hinge hole, and the middle hinge hole is fixed with the mechanical arm rotating shaft of the excavator.

[0020] Further, the second head cover is provided with a lower hinge hole and is hingedly matched with the upper hinge hole of the first head cover, and then the middle hinge hole of the first head cover is rotated downward to adjust the impact angle of the impact hammer, so that the vertical or inclined posture can be maintained to implement the breaking impact.

[0021] The beneficial effects of the present application are:

[0022] 1. The improved heavy impact hammer can independently or synchronously control the flow and closing of high-pressure oil through the double-way electromagnetic valve, the size of the striking force can be adjusted, and the most suitable striking force is selected according to different working conditions;

[0023] 2. The stroke sensing switch is designed on the upper surface of the oil cylinder, the upper, middle and lower signals of the stroke position of the oil cylinder are collected, the touch screen of the breaking hammer is set, the collected oil cylinder position signals are transmitted to the touch screen, the running state of the breaking hammer can be understood at any time, and the breaking hammer is controlled, especially by adjusting the stroke of the oil cylinder, the striking force is increased or reduced, intelligent control, high efficiency and safety;

[0024] 3. The connecting point of the breaking hammer and the excavator is designed between the main sleeve and the front cylinder body, and the first head cover and the second head cover are connected with the excavator. Compared with the traditional breaking hammer top connection, the vibration force center axis is avoided, the vibration force of the breaking hammer to the mechanical parts and hydraulic pipeline of the excavator is reduced to the maximum extent, the support ring of high-force brass material used in the hammer head can greatly reduce the wear caused by oblique operation, and the adaptability is wider in response to different operation surfaces.

[0025] 4. In the construction, when the hammer head returns from the bottom to the top, the high-pressure oil pressure is converted into the maximum weight potential energy and the nitrogen gas potential energy. When the hammer head falls, the weight potential energy and the nitrogen gas compression potential energy are released to the maximum, and the impact force on the drill rod can reach more than 3 times of that of the traditional breaking hammer, solving the problem of breaking hard rock. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 it is a perspective view of the improved heavy impact hammer of the embodiment;

[0027] Figure 2 it is an exploded view of the main sleeve, the oil cylinder cover, the accumulator cover, the accumulator, the oil cylinder and the piston assembly described in the embodiment;

[0028] Figure 3 it is an exploded view of each component of the front cylinder body described in the embodiment;

[0029] Figure 4 it is an oil circuit diagram of the double-way electromagnetic valve described in the embodiment;

[0030] Figure 5 it is a working condition logic control table of the double-way electromagnetic valve described in the embodiment;

[0031] Wherein, A-front cylinder body, A1-inner sleeve, A2-outer sleeve, A3-drill rod, A4-flat pin, A5-inner and outer sleeve round pin, A6-first head cover, A7-stop pin, A8-damping block, A9-second head cover, B-main sleeve, B1-hammer head, B2-impact head, C-oil cylinder cover, D-accumulator cover, E-top cover, F-accumulator, F1-gasket, F2-ACC fixed flange, G-oil cylinder, G1-O ring, G2-travel sensing switch, G3-oil pipe buckle, G4-adjusting pad, H-piston assembly, H1-coupling cap, S1-M42 bolt, S2-M20 inner hexagonal bolt, S3-M24 inner hexagonal bolt, S4-M14 inner hexagonal bolt, S5-M16 inner hexagonal bolt. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application.

[0033] Please refer to Figures 1-4 The embodiment proposes an improved heavy impact hammer, which comprises a front cylinder body A, a main sleeve B, an oil cylinder cover C, an accumulator cover D, an accumulator F, an oil cylinder G and a piston assembly H, a travel sensing switch G2 for controlling the travel position of the oil cylinder G, a double-way electromagnetic valve for controlling the on-off of high-pressure oil, and a touch screen (not shown in the figure) for displaying the position signal of the oil cylinder G.

[0034] Please refer to Figure 3The front cylinder body A is internally provided with an inner sleeve A1, an outer sleeve A2, a damping block A8, a flat pin A4 and a drill rod A3, and externally fixed with a first head cover A6. The inner sleeve A1 and the outer sleeve A2 are coaxially sleeved and stacked, the drill rod A3 is fixed below the outer sleeve A2, the damping block A8 is arranged on the upper end surface of the inner sleeve A1, and cooperates with a striking head B2 in a main sleeve B to apply impact force to the drill rod A3 and buffer the inertia generated by instantaneous impact. The flat pin A4 is radially sleeved on the outer sidewall of the front cylinder body A and clamps and limits the platform surface of the drill rod A3. The main sleeve B is fixed on the upper end surface of the main sleeve B by bolts.

[0035] Referring to Figure 2 The main sleeve B is internally sleeved with a hammer head B1, the outer ring of the hammer head B1 is provided with a support ring made of high-force brass and is in sliding cooperation with the inner wall of the main sleeve B to reduce wear, the inner hole of the hammer head B1 is provided with a piston assembly H, the hammer head B1 is fixed below the striking head B2, and the outer wall of the main sleeve B is fixed with a second head cover A9.

[0036] Referring to Figure 2 The piston assembly H includes a piston and a piston rod. The piston is in close cooperation with the inner wall of the oil cylinder G. The lower end of the piston rod passes through the center hole of the hammer head B1 and is fixed and connected with the striking head B2 by screwing and nutting through a cap H1.

[0037] Referring to Figure 2 The oil cylinder G is arranged in an oil cylinder cover C. The upper end of the oil cylinder G is further connected with an accumulator F through a gasket F1 and an ACC fixed flange F2. The accumulator F is internally provided with a nitrogen chamber and maintains sufficient nitrogen storage. The outer ring of the accumulator F is further sleeved with an accumulator cover D, and the upper end of the accumulator cover D is further fixed with a top cover E.

[0038] Referring to Figure 4 The stroke sensing switch G2 is arranged at a reasonable interval on one side of the stroke position of the piston rod according to the impact force required by the drill rod A3, and cooperates with the touch screen to obtain the position information of the piston rod. According to the actual impact surface force and frequency requirement, the touch screen is manually controlled to select the appropriate impact stroke for the piston rod, so as to adjust the impact force and impact frequency of the impact hammer.

[0039] Further, referring to Figure 4 The double-way electromagnetic valve can independently and synchronously give the oil cylinder G to flow high-pressure oil, and the striking force is adjustable. The most suitable striking force is selected according to different working conditions, and the efficiency is higher.

[0040] Further, the accumulator cover D is fixed on the upper end surface of the oil cylinder cover C by bolts, and the oil cylinder cover C is fixed on the upper end surface of the main sleeve B by bolts.

[0041] Further, referring to Figure 1The first head cover A6 is provided with an upper hinge hole and a middle hinge hole, and the middle hinge hole is fixedly connected with the rotation shaft of the mechanical arm of the excavator.

[0042] Further, referring to Figure 1 The second head cover A9 is provided with a lower hinge hole and is hingedly connected with the upper hinge hole of the first head cover A6, and the impact angle of the impact hammer can be adjusted by rotating the lower part of the first head cover A6 through the middle hinge hole, so that the impact hammer can be kept in a vertical or inclined posture to perform crushing and striking.

[0043] The significant advantages of the embodiment are:

[0044] 1. Efficiency is increased by 3 times: the piston stroke can be adjusted, the weight of the hammer head is increased, and the maximum striking force can be increased by 3 times;

[0045] 2. Oblique operation can be performed: stroke sensing and electromagnetic valve control of the oil cylinder can ensure long-time oblique operation;

[0046] 3. Low oil consumption and more environmentally friendly: fixed construction quantity is completed, oil consumption is reduced, carbon emissions are reduced, and the environment is more friendly;

[0047] 4. Vibration is reduced by 50%: the connection part of the breaking hammer and the excavator is optimized and designed, the vibration force is maximally differentiated, the vibration force transmitted to the excavator is reduced by 50%, the mechanical parts and hydraulic system of the excavator are protected, and the excavator is more durable.

[0048] The embodiments of the application are described in detail above in combination with the drawings, but the application is not limited to the above-described embodiments, and various changes, modifications, replacements and variations can be made within the knowledge of those skilled in the art without departing from the purpose of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. An improved heavy-duty impact hammer, comprising a front cylinder body, a main sleeve, a cylinder guard, an accumulator guard, an accumulator, a cylinder, and a piston assembly, characterized in that: In addition, there is a stroke sensor switch to control the position of the hydraulic cylinder, a dual-way solenoid valve to control the on / off of high-pressure oil, and a touch screen to display the position signal of the hydraulic cylinder. The front cylinder body is equipped with an inner sleeve, an outer sleeve, a shock absorber, a flat pin, and a chisel. A first head cover is fixed to the outer side. The inner sleeve and outer sleeve are coaxially stacked, and the chisel is fixed to the bottom of the outer sleeve. The shock absorber is located on the upper end face of the inner sleeve and works with the striking head in the main sleeve to apply impact force to the chisel and buffer the inertia generated by the instantaneous impact. The flat pin is radially sleeved on the outer wall of the front cylinder body and clamps and limits the position of the platform surface opened on the outer side of the chisel. The main sleeve is fixed to the top of the front cylinder body by bolts. A hammerhead is fitted inside the main sleeve. A high-strength brass support ring is provided around the outer ring of the hammerhead, which slides in conjunction with the inner wall of the main sleeve. A piston assembly is provided inside the hammerhead. A striking head is fixedly connected below the hammerhead. A second head cap is fixedly connected to the outer wall of the main sleeve. The piston assembly includes a piston and a piston rod. The piston fits tightly against the inner wall of the cylinder. The lower end of the piston rod passes through the central hole of the hammer head and is then screwed to the striking head via a cap. The hydraulic cylinder is housed within a cylinder guard, and an accumulator is connected to the upper end of the cylinder via a gasket and an ACC fixing flange. The stroke sensing switches are set at reasonable intervals on one side of the piston rod's stroke position according to the required impact force of the drill rod. They work with the touch screen to obtain the position information of the piston rod. Based on the actual impact force and frequency requirements of the impact surface, the touch screen is manually adjusted to select a suitable impact stroke for the piston rod, thereby adjusting the impact force and impact frequency of the impact hammer.

2. The improved heavy-duty impact hammer according to claim 1, characterized in that: The accumulator is equipped with a nitrogen chamber and maintains a sufficient nitrogen storage capacity. The accumulator is also covered with an accumulator cover.

3. The improved heavy-duty impact hammer according to claim 1, characterized in that: The dual-channel solenoid valve can independently or synchronously supply high-pressure oil to the cylinder, and the impact force is adjustable.

4. The improved heavy-duty impact hammer according to claim 1, characterized in that: The accumulator cover is bolted to the upper end face of the cylinder cover, and the cylinder cover is bolted to the upper end face of the main sleeve.

5. The improved heavy-duty impact hammer according to claim 1, characterized in that: The first head cover is provided with an upper hinge hole and a middle hinge hole, and the middle hinge hole is fixedly connected to the mechanical arm shaft of the excavator.

6. The improved heavy-duty impact hammer according to claim 1, characterized in that: The second head cover is provided with a lower hinge hole, which is hinged to the upper hinge hole of the first head cover. The impact angle of the impact hammer is adjusted by rotating the first head cover through the middle hinge hole.

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