Device for enhancing hitting power of breaking hammer

Abstract

According to the device for enhancing the hitting power of the breaking hammer, the oil inlet end of the breaking hammer is connected with a main pump, the main pump is connected with an oil tank through a pilot-operated overflow valve, and the pilot end of the pilot-operated overflow valve is connected with a pilot pump through an electromagnetic valve; a delay reversing device and a delay reversing groove are arranged in the breaking hammer, the delay reversing groove is parallel to the reversing signal groove, the delay reversing device is arranged between the delay reversing groove and the reversing signal groove, and the delay reversing device is connected with the pilot end of the pilot overflow valve. And the delay reversing device blocks the delay reversing groove and the reversing signal groove under the action of the pilot hydraulic oil. According to the device for enhancing the hitting power of the breaking hammer, the secondary overflow device and the delayed reversing device are arranged, the secondary overflow device can improve the arrangement pressure of a system and is used for improving the hitting power, the delayed reversing device can increase the nitrogen pressure and prolong the hitting stroke and is used for improving the hitting power, and the working efficiency of the breaking hammer is greatly improved; and meanwhile, the hitting power of the breaking hammer is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, in particular to a device for enhancing the striking force of a breaker hammer. Background Art

[0002] Nowadays, in the mining process, the requirements for large-scale breaker hammers are increasing day by day. A breaker hammer is an important mining construction tool. Its structure mainly includes the core part, the shell part, and the hydraulic pipeline connecting the whole machine. In the actual work of the breaker hammer, the core part is responsible for driving the piston to hit the drill rod to generate striking energy, and the hydraulic pipeline part is responsible for transmitting the hydraulic energy provided by the whole machine.

[0003] At present, the mechanism of the breaker hammer is not provided with a delayed reversing device, and the hydraulic pipeline is not provided with a secondary overflow device, or only with a common overflow valve. When the hardness of the crushed object is too high, the breaker hammer cannot continue to crush. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a device for enhancing the striking force of a breaker hammer with a simple structure and good effect.

[0005] The present invention is implemented with the following technical scheme: a device for enhancing the striking force of a breaker hammer, comprising a breaker hammer, wherein the oil inlet end of the breaker hammer is connected to a main pump, the main pump is connected to an oil tank through a pilot overflow valve, and the pilot end of the pilot overflow valve is connected to a pilot pump through a solenoid valve; a delayed reversing device and a delayed reversing groove are provided in the breaker hammer, the delayed reversing groove is parallel to the reversing signal groove, the delayed reversing device is arranged between the delayed reversing groove and the reversing signal groove, the delayed reversing device is connected to the pilot end of the pilot overflow valve, and the delayed reversing device blocks the delayed reversing groove and the reversing signal groove under the action of the pilot hydraulic oil.

[0006] Furthermore, the solenoid valve is a two-position three-way solenoid reversing valve, and a control end of the solenoid valve is connected to a controller.

[0007] The delayed reversing device comprises a regulator and a spring, wherein the spring is arranged at the upper end of the regulator, and the lower end of the regulator is a pilot oil port.

[0008] The delayed reversing groove and the reversing signal groove are connected through an oil passage, and the regulator is arranged below the oil passage. The regulator blocks the connection of the oil passage under the action of the pilot hydraulic oil.

[0009] The regulator is vertically arranged below the oil passage.

[0010] The regulator is a T-shaped piston.

[0011] A reversing valve and a piston rod are arranged in the breaker hammer. The control end at the lower end of the reversing valve controls the piston rod to move downward. The reversing signal slot is connected to the control end at the lower end of the reversing valve. The delayed reversing slot is arranged above the reversing signal slot.

[0012] The present invention has the following advantages: the device for enhancing the striking force of the breaker hammer is provided with a secondary overflow device and a delayed reversing device. The secondary overflow device can increase the system's sorting pressure to enhance the striking force. The delayed reversing device can increase the nitrogen pressure and extend the striking stroke to enhance the striking force. This avoids the problem of weak striking caused by traditional technologies, greatly improves the working efficiency of the breaker hammer, and further enhances the striking force of the breaker hammer. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0014] In the attached picture: Figure 1 It is the hydraulic principle diagram of the present invention; Figure 2 It is a structural principle diagram of delayed commutation of the present invention; Figure 3 This is a schematic diagram of the oil circuit inside the cylinder during normal reversing of the present invention; Figure 4 It is a schematic diagram of the oil circuit inside the cylinder during delayed reversing of the present invention.

[0015] In the figure: 1. controller, 2. solenoid valve, 3. pilot relief valve, 4. delayed reversing groove, 5. regulator, 6. spring, 7. reversing signal groove, 8. pilot oil port, 9. main pump, 10. pilot pump.

[0016] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0018] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] like Figures 1 to 4 A device for enhancing the striking force of a breaker hammer is shown, comprising a breaker hammer, the oil inlet end of the breaker hammer is connected to a main pump 9, the main pump 9 is connected to the oil tank through a pilot overflow valve 3, the pilot end of the pilot overflow valve 3 is connected to a pilot pump 10 through a solenoid valve 2; a delayed reversing device and a delayed reversing groove 4 are provided in the breaker hammer, the delayed reversing groove 4 is parallel to the reversing signal groove 7, the delayed reversing device is arranged between the delayed reversing groove 4 and the reversing signal groove 7, the delayed reversing device is connected to the pilot end of the pilot overflow valve 3, and the delayed reversing device blocks the delayed reversing groove 4 and the reversing signal groove 7 under the action of the pilot hydraulic oil. The device for enhancing the striking force of a breaker hammer of the present invention is provided with a secondary overflow device and a delayed reversing device, both of which are controlled by a pilot oil. When the secondary overflow and the delayed reversing device are required, the reversing of the solenoid valve is controlled so that the pilot pump provides the pilot oil for the secondary overflow and the delayed reversing device, thereby completing the actions of the secondary overflow and the delayed reversing, realizing the secondary pressurization of the overflow valve, increasing the working pressure, realizing the delay of the reversing point, increasing the nitrogen pressure, and realizing the delay of the reversing point, increasing the striking stroke.

[0021] like Figure 1 A device for enhancing the striking force of a breaker hammer is shown, wherein the solenoid valve 2 is a two-position three-way solenoid reversing valve, and the control end of the solenoid valve 2 is connected to a controller 1. The solenoid valve of the present invention is a two-position three-way solenoid reversing valve, and the left working position is connected to a pilot pump, a pilot overflow valve, and a delayed reversing device, and is used to provide pilot oil to the pilot overflow valve and the delayed reversing device, so that secondary overflow and delayed reversing participate in the system; the right working position connects the pilot end of the pilot overflow valve and the delayed reversing device to the oil tank, and the system is in a normal working state at this time, and secondary overflow and delayed reversing are not performed.

[0022] like Figure 2 A device for enhancing the striking force of a breaker hammer is shown, wherein the delayed reversing device comprises a regulator 5 and a spring 6, wherein the spring 6 is arranged at the upper end of the regulator 5, and the lower end of the regulator 5 is a pilot oil port 8. The delayed reversing slot 4 and the reversing signal slot 7 are connected through an oil passage, and the regulator 5 is arranged below the oil passage, and the regulator 5 blocks the connection of the oil passage under the action of the pilot hydraulic oil. The delayed reversing device of the present invention includes a regulator and a spring. The spring is arranged on the upper part of the regulator. The lower part of the regulator is connected to the pilot oil port. The delayed reversing device is arranged between the delayed reversing groove and the reversing signal groove. The reversing signal groove is a pipeline for providing oil at the control end of the reversing valve for the breaker in a conventional system. The delayed reversing groove is a pipeline for providing oil at the control end of the reversing valve for the breaker in the delayed reversing system. The delayed reversing groove and the reversing signal groove are connected through an oil channel. In the conventional system, the regulator is located below the oil channel under the action of the spring, the delayed reversing groove and the reversing signal groove are connected to each other, and are both connected to the control end of the reversing valve, which does not affect the reversing time of the piston rod. When delayed reversing is required, the pilot oil pushes the regulator upward to block the conduction of the oil channel. The oil between the delayed reversing groove and the reversing signal groove does not circulate with each other. At this time, only the delayed reversing groove provides oil to the control end of the reversing valve, so that the reversing time of the piston rod is extended to achieve the effect of delayed reversing.

[0023] like Figure 2 The device for enhancing the striking force of a breaker hammer is shown, wherein the regulator 5 is vertically arranged below the oil passage. The regulator of the present invention is perpendicular to the oil passage, and under the action of the pilot hydraulic oil, the regulator rises to block the oil passage, thereby isolating the delayed reversing slot and the reversing signal slot.

[0024] like Figure 2 The device for enhancing the striking force of a breaker hammer is shown, wherein the regulator 5 is a T-type piston. The regulator of the present invention is a T-type piston, a spring is arranged on the upper part of the T-type piston, and a pilot oil port is connected to the lower end of the T-type piston. Under the action of the spring and the pilot oil, the T-type piston can move in the pipeline to realize the opening and blocking of the oil channel.

[0025] like Figures 2 to 4A device for enhancing the striking force of a breaker hammer is shown, wherein a reversing valve and a piston rod are provided inside the breaker hammer, the control end at the lower end of the reversing valve controls the downward movement of the piston rod, the reversing signal slot 7 is connected to the control end at the lower end of the reversing valve, and the delayed reversing slot 4 is arranged above the reversing signal slot 7. The reversing signal slot of the present invention is connected to the control end of the reversing valve in the breaker hammer, wherein the upper control end of the reversing valve is used to control the upward movement of the piston rod, and the lower control end is used to control the upward movement of the piston rod. When the piston rod moves upward, the oil first enters the reversing signal slot and then enters the delayed reversing slot. When the system does not perform delayed reversing, the delayed reversing slot and the reversing signal slot are connected, and the control oil first passes through the reversing signal slot to enter the lower control end of the reversing valve to control the downward movement of the piston rod. When the system needs to perform delayed reversing, the delayed reversing slot and the reversing signal slot are blocked. When the piston rod moves to the reversing position, the control oil no longer flows through the reversing signal slot. At this time, no control oil enters the reversing valve, and the piston rod continues to move upward. As the piston rod moves to the oil inlet point of the delayed reversing slot, the control oil passes through the delayed reversing slot and enters the lower end of the reversing valve. At this time, the piston rod can be reversed, and the operating time is longer than that of the conventional system, thereby realizing the effect of delayed reversing.

[0026] During use, when the crushing conditions are bad, the striking force enhancement device is turned on, the controller receives the electrical signal from the operator, and transmits it to the solenoid valve through the wiring harness. The solenoid valve switches to the left position to work. At this time, the pilot pump transmits the oil to the pilot relief valve through the solenoid valve, so as to perform secondary regulation of the relief pressure to achieve the boosting effect. At the same time, the oil is transmitted to the delayed reversing device through the pilot oil port. The regulator is affected by the pilot pressure, overcomes the force of the spring, and moves forward, thereby cutting off the passage between the delayed reversing slot and the reversing signal slot, making the reversing signal slot invalid. At this time, the reversing valve inside the breaker is only driven by the delayed reversing slot, thereby achieving the delayed reversing effect.

[0027] The device for enhancing the striking force of a breaker hammer of the present invention delays the reversing of a reversing valve in the breaker hammer to increase the upward stroke of the piston, thereby causing the nitrogen chamber of the rear cylinder to be further compressed when the piston moves upward, thereby achieving the effect of increasing the nitrogen pressure; at the same time, the delayed reversing of the reversing valve increases the overall working stroke of the piston, thereby causing the stroke of the piston to be further increased when the piston moves downward, thereby achieving the effect of increasing the striking force.

[0028] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0029] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0030] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A device for enhancing the striking force of a breaker hammer, characterized in that: The invention comprises a breaker hammer, wherein the oil inlet end of the breaker hammer is connected to a main pump (9), the main pump (9) is connected to an oil tank via a pilot relief valve (3), and the pilot end of the pilot relief valve (3) is connected to a pilot pump (10) via a solenoid valve (2); a delayed reversing device and a delayed reversing groove (4) are provided inside the breaker hammer, the delayed reversing groove (4) is parallel to a reversing signal groove (7), the delayed reversing device is arranged between the delayed reversing groove (4) and the reversing signal groove (7), the delayed reversing device is connected to the pilot end of the pilot relief valve (3), and the delayed reversing device blocks the delayed reversing groove (4) and the reversing signal groove (7) under the action of the pilot hydraulic oil.

2. A device for enhancing the striking force of a breaker hammer as claimed in claim 1, characterized in that: The solenoid valve (2) is a two-position three-way solenoid directional control valve, and a control end of the solenoid valve (2) is connected to a controller (1).

3. A device for enhancing the striking force of a breaker hammer as claimed in claim 1, characterized in that: The delayed reversing device comprises a regulator (5) and a spring (6), wherein the spring (6) is arranged at the upper end of the regulator (5), and the lower end of the regulator (5) is a pilot oil port (8).

4. A device for enhancing the striking force of a breaker hammer as claimed in claim 3, characterized in that: The delayed reversing slot (4) and the reversing signal slot (7) are connected via an oil passage, and the regulator (5) is arranged below the oil passage. The regulator (5) blocks the connection of the oil passage under the action of the pilot hydraulic oil.

5. A device for enhancing the striking force of a breaker hammer as claimed in claim 4, characterized in that: The regulator (5) is vertically arranged below the oil channel.

6. A device for enhancing the striking force of a breaker hammer as claimed in claim 3, characterized in that: The regulator (5) is a T-shaped piston.

7. A device for enhancing the striking force of a breaker hammer as claimed in claim 1, characterized in that: A reversing valve and a piston rod are provided in the breaker hammer. The control end at the lower end of the reversing valve controls the piston rod to move downward. The reversing signal slot (7) is connected to the control end at the lower end of the reversing valve. The delayed reversing slot (4) is arranged above the reversing signal slot (7).

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