Quartering hammer with piston resetting function and storage control method

Abstract

The invention discloses a breaking hammer with a piston reset function and a storage control method, and belongs to the technical field of breaking hammer control, the storage control method comprises the following steps: acquiring a signal that an excavator is switched to an intelligent storage mode, starting to receive a nitrogen pressure feedback signal in a rear cylinder body, and if the nitrogen pressure is greater than 0, starting to control the piston reset function; if yes, an electromagnetic switch on the rear cylinder body is controlled to be turned on to release nitrogen, and nitrogen pressure is gradually reduced; if the nitrogen pressure is reduced to 0, a main pump starts to be controlled to work, and high-pressure oil is supplied to a middle cylinder body, so that a piston continuously ascends under the action of the high-pressure oil; and when a reversing point on the piston reaches the position of a signal groove in the middle cylinder body, a piston tail end position signal is obtained, the main pump is controlled to stop working, and then the electromagnetic switch on the rear cylinder body is controlled to be turned off. Manual operation is not needed, automatic nitrogen discharging of the breaking hammer and automatic retraction of the piston can be achieved, and the corrosion phenomenon of the sealing section of the piston during long-term storage is prevented.

Description

Technical Field

[0001] This invention relates to a hydraulic breaker with piston reset function and a storage control method, belonging to the field of hydraulic breaker control technology. Background Technology

[0002] A hydraulic breaker, also known as a hydraulic impactor, is a hydraulic impact and vibration tool. It uses high-pressure hydraulic oil as its working medium. Through the feedback coordination of a valve control system and a cylinder-piston system, it achieves rapid reciprocating motion of the piston within the cylinder, which strikes a chisel to perform work. Heavy-duty hydraulic breakers generally employ a combined hydraulic-pneumatic principle. The rear cylinder of the breaker is filled with nitrogen, and the impact energy of the hydraulic hammer is provided by both gas and hydraulic fluid. When the piston returns, the nitrogen in the rear cylinder is compressed and stored as energy. During the stroke, this energy is released and, together with the hydraulic fluid, pushes the piston downward, converting it into impact energy at the impact point to achieve the breaking operation. It mainly consists of a core assembly, a housing assembly, a pin assembly, and an oil pipe assembly.

[0003] The rear cylinder of the existing hydraulic breaker is a nitrogen chamber, and nitrogen is added and released through a nitrogen valve. When the piston moves upward, the piston tip enters the nitrogen chamber and occupies the nitrogen volume, and the nitrogen is compressed to store energy; when the piston reverses its direction under the action of the control oil circuit, the nitrogen expands and releases energy, which, together with the hydraulic oil, provides power to the piston.

[0004] In the non-operating state, nitrogen gas in the rear cylinder pushes the piston forward to the limit point in the inner cavity of the front cylinder. During long-term idle storage, humid air can enter the inner cavity of the front cylinder along the chisel and exhaust passage, exposing the piston seal section to air, making it prone to corrosion. Reuse of the product can cause oil seal leaks, and even serious malfunctions such as valve jamming and cylinder scoring. To solve this problem, most manufacturers now require that the piston be pushed back into the middle cylinder during long-term storage, ensuring that the lower piston seal section retracts into the middle cylinder oil seal and is not exposed to moisture to prevent corrosion. However, this operation requires sequentially removing the stop pin, chisel pin, and chisel, then manually purging the nitrogen gas and forcibly pushing the piston into the middle cylinder from the front with a wooden stick, and finally reinstalling the chisel (or reinstalling the chisel before product reuse). This entire process is time-consuming and labor-intensive. Due to the complexity of this operation, drivers are unwilling to comply with this storage requirement, resulting in frequent cases of hydraulic breaker pistons suffering from oil leaks, valve jamming, and cylinder scoring due to storage corrosion. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a hydraulic breaker with piston reset function and storage control method, which does not require manual operation, can realize automatic nitrogen discharge of the hydraulic breaker and automatic piston retraction, and prevent the piston sealing section from rusting during long-term storage.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] In a first aspect, the present invention discloses a storage control method for a hydraulic breaker with a piston reset function, comprising the following steps:

[0008] Once the excavator switches to intelligent storage mode, it begins to receive nitrogen pressure feedback signals from the rear cylinder. If the nitrogen pressure is greater than 0, it controls the electromagnetic switch on the rear cylinder to open and release nitrogen, causing the nitrogen pressure to gradually decrease.

[0009] If the nitrogen pressure drops to 0, the main pump will start working to supply high-pressure oil to the middle cylinder so that the piston will continuously move upward under the action of the high-pressure oil.

[0010] The system continuously monitors the piston position. When the piston reversing point reaches the signal slot position on the middle cylinder block, it acquires the piston end position signal, first controls the main pump to stop working, and then controls the electromagnetic switch on the rear cylinder block to close.

[0011] The nitrogen pressure feedback signal is acquired by a nitrogen pressure sensor installed on the electromagnetic switch.

[0012] The piston end position signal is acquired by a piston position sensor installed on the rear cylinder block.

[0013] The nitrogen pressure feedback signal and piston end position signal are displayed on the monitor.

[0014] Secondly, this invention discloses a hydraulic breaker with a piston reset function. The cylinder body includes a front cylinder body, a middle cylinder body, and a rear cylinder body connected sequentially from front to back. A chisel and a piston are disposed within the cylinder body. The rear end of the chisel body is connected to the front end of the piston. The middle cylinder body is provided with a first oil chamber and a second oil chamber, which are connected to a valve control system. A reversing point is provided on the piston. A signal groove is provided on the middle cylinder body. The rear cylinder body is filled with nitrogen gas. An electromagnetic switch for controlling the on / off state of the nitrogen gas and a piston position sensor are disposed on the rear cylinder body. A nitrogen pressure sensor is integrated on the electromagnetic switch. The piston position sensor and the piston position sensor are electrically connected to the signal input terminal of an excavator controller. The signal output terminal of the excavator controller is electrically connected to the electromagnetic switch and the control switch of the main pump in the valve control system. The excavator controller is configured to execute the storage control method for the hydraulic breaker with a piston reset function.

[0015] The excavator controller is electrically connected to the storage button.

[0016] The excavator controller is electrically connected to the display.

[0017] The front cylinder block is provided with a drill pin that restricts the position of the drill rod.

[0018] The beneficial effects of this invention are as follows: This invention provides a hydraulic breaker with piston reset function and a storage control method. First, it acquires a signal that the excavator has switched to intelligent storage mode. Once in intelligent storage mode, if the nitrogen pressure is greater than 0, it controls the electromagnetic switch on the rear cylinder to open to release nitrogen, gradually reducing the nitrogen pressure. If the nitrogen pressure drops to 0, it starts controlling the main pump to work, supplying high-pressure oil to the middle cylinder, causing the piston to continuously move upward under the action of the high-pressure oil. It continuously acquires the piston end position signal. When the reversing point on the piston reaches the signal groove position on the middle cylinder, it first controls the main pump to stop working, and then controls the electromagnetic switch on the rear cylinder to close. The entire control process can realize automatic nitrogen discharge and automatic piston retraction of the hydraulic breaker, preventing corrosion of the piston sealing section during long-term storage. It eliminates the need for complex series of operations such as removing the chisel, manually releasing nitrogen, and knocking back the piston. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a hydraulic breaker with piston reset function according to the present invention;

[0020] Figure 2 This is a schematic flowchart of a storage control method for a hydraulic breaker with piston reset function according to the present invention.

[0021] The following labels are used in the attached diagram: 1-Front cylinder block; 2-Middle cylinder block; 3-Rear cylinder block; 4-Chisel rod; 5-Piston; 6-Chisel rod pin; 7-First oil chamber; 8-Second oil chamber; 9-Reversing point; 10-Signal slot; 11-Electromagnetic switch; 12-Piston position sensor; 13-Excavator controller; 14-Display. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 2 As shown, this invention discloses a storage control method for a hydraulic breaker with a piston reset function, comprising the following steps:

[0025] Step 1: Obtain the signal that the excavator has switched to intelligent storage mode, and start receiving the nitrogen pressure feedback signal in the rear cylinder. If the nitrogen pressure is greater than 0, control the electromagnetic switch on the rear cylinder to open to release nitrogen and gradually reduce the nitrogen pressure.

[0026] Step 2: If the nitrogen pressure drops to 0, start controlling the main pump to supply high-pressure oil to the middle cylinder so that the piston moves upward continuously under the action of the high-pressure oil.

[0027] Step 3: Control the continuous detection of piston position. When the reversing point on the piston reaches the signal groove position on the middle cylinder block, obtain the piston end position signal, first control the main pump to stop working, and then control the electromagnetic switch on the rear cylinder block to close.

[0028] In this invention, the operator can start the entire control process through the intelligent storage button in the cab, realizing automatic nitrogen discharge and automatic piston retraction of the hydraulic breaker, preventing corrosion of the piston sealing section during long-term storage; eliminating the need for a series of complex operations such as disassembling the chisel, manually releasing nitrogen, and knocking back the piston.

[0029] Example 2

[0030] like Figure 1 As shown, this invention discloses a hydraulic breaker with a piston reset function, comprising a cylinder body. The cylinder body includes a front cylinder body 1, a middle cylinder body 2, and a rear cylinder body 3 connected sequentially from front to back. A chisel 4 and a piston 5 are disposed within the cylinder body. A chisel pin 6 is disposed on the front cylinder body 1 to limit the position of the chisel 4. The rear end of the chisel 4 is connected to the front end of the piston 5. The middle cylinder body 2 is provided with a first oil chamber 7 and a second oil chamber 8, which are connected to a valve control system. A reversing point 9 is disposed on the piston 5. A signal groove 10 is disposed on the middle cylinder body 2. The rear cylinder body 7 is filled with nitrogen gas. This part is a conventional hydraulic breaker structure.

[0031] An electromagnetic switch 11 for controlling the flow of nitrogen gas and a piston position sensor 12 are installed on the rear cylinder 7. The electromagnetic switch 11 enables automatic nitrogen venting from the rear cylinder 3. The piston position sensor 12 is used to collect the end position signal of the piston 5 for detecting the position of the piston 5. A nitrogen pressure sensor is integrated on the electromagnetic switch 11 to collect the nitrogen pressure feedback signal to ensure monitoring of the nitrogen chamber pressure. The piston position sensor 12 and the piston position sensor 12 are electrically connected to the signal input terminal of the excavator controller 13. The signal output terminal of the excavator controller 13 is electrically connected to the electromagnetic switch 11 and the control switch of the main pump in the valve control system. The excavator controller 13 is configured to execute the storage control method for the breaker hammer with piston reset function in Embodiment 1. The excavator controller 13 is electrically connected to the display 14, which is used to display the nitrogen pressure feedback signal and the piston end position signal.

[0032] The excavator controller 13 is electrically connected to the storage button, which controls the start of the entire process. When the hammer needs to be disassembled and stored for a long time, the operator uses the intelligent storage button to automatically release nitrogen from the rear cylinder, supply oil to the hammer, retract the piston, and stop the oil supply, keeping the piston in the retracted state. This solves the problem of piston corrosion during long-term storage.

[0033] Example 3

[0034] like Figure 1As shown, this invention discloses a hydraulic breaker with a piston reset function, comprising a cylinder body. The cylinder body includes a front cylinder body 1, a middle cylinder body 2, and a rear cylinder body 3 connected sequentially from front to back. A chisel 4 and a piston 5 are disposed within the cylinder body. A chisel pin 6 is disposed on the front cylinder body 1 to limit the position of the chisel 4. The rear end of the chisel 4 is connected to the front end of the piston 5. The middle cylinder body 2 is provided with a first oil chamber 7 and a second oil chamber 8, which are connected to a valve control system. A reversing point 9 is disposed on the piston 5. A signal groove 10 is disposed on the middle cylinder body 2. The rear cylinder body 7 is filled with nitrogen gas. This part is a conventional hydraulic breaker structure.

[0035] An electromagnetic switch 11 for controlling nitrogen flow and a piston position sensor 12 are installed on the rear cylinder block 7. The electromagnetic switch 11 enables automatic nitrogen venting from the rear cylinder 3. The piston position sensor 12 is used to collect the end position signal of the piston 5 for detecting the position of the piston 5. A nitrogen pressure sensor is integrated on the electromagnetic switch 11 to collect nitrogen pressure feedback signals to ensure monitoring of the nitrogen chamber pressure. The piston position sensor 12 and the piston position sensor 12 are electrically connected to the signal input terminal of the excavator controller 13. The signal output terminal of the excavator controller 13 is electrically connected to the electromagnetic switch 11 and the control switch of the main pump in the valve control system.

[0036] like Figure 2 As shown, this invention discloses a storage control method for a hydraulic breaker with a piston reset function. The specific process is as follows: When the breaker needs to be disassembled for long-term storage, the driver presses the breaker vertically downwards, pressing the chisel rod to the bottom. When the driver presses the intelligent storage button, the excavator switches to intelligent storage mode, and the excavator controller 13 begins to receive the pressure feedback signal from the nitrogen pressure sensor. Because the nitrogen in the rear cylinder 3 is greater than zero, the electromagnetic switch 11 is directly opened to vent the nitrogen. When the nitrogen is vented and the pressure is zero, the excavator controller 13 opens the main pump to supply oil to the breaker. The piston 5 moves upwards continuously under the action of high-pressure oil. When the piston 5 reversing point 9 reaches the position of the middle cylinder signal slot 10, the piston position sensor 12 transmits a signal to the excavator controller 13. After receiving the signal from the piston position sensor 12, the excavator controller 13 immediately cuts off the main pump oil supply, causing the piston 5 to stop at a high position and no longer move. The lower sealing section of the piston retracts into the middle cylinder 2, preventing contact with moisture. Finally, the electromagnetic switch 11 is closed.

[0037] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A storage control method for a hydraulic breaker with piston reset function, characterized in that: Includes the following steps: Once the excavator switches to intelligent storage mode, it begins to receive nitrogen pressure feedback signals from the rear cylinder. If the nitrogen pressure is greater than 0, it controls the electromagnetic switch on the rear cylinder to open and release nitrogen, causing the nitrogen pressure to gradually decrease. If the nitrogen pressure drops to 0, the main pump will start working to supply high-pressure oil to the middle cylinder so that the piston will continuously move upward under the action of the high-pressure oil. The system continuously monitors the piston position. When the piston reversing point reaches the signal slot position on the middle cylinder block, it acquires the piston end position signal, first controls the main pump to stop working, and then controls the electromagnetic switch on the rear cylinder block to close.

2. The control method for a hydraulic breaker with piston reset function according to claim 1, characterized in that: The nitrogen pressure feedback signal is acquired by a nitrogen pressure sensor installed on the electromagnetic switch.

3. The control method for a hydraulic breaker with piston reset function according to claim 1, characterized in that: The piston end position signal is acquired by a piston position sensor installed on the rear cylinder block.

4. The control method for a hydraulic breaker with piston reset function according to claim 1, characterized in that: The nitrogen pressure feedback signal and piston end position signal are displayed on the monitor.

5. A hydraulic breaker with piston reset function, characterized in that: The system includes a cylinder block comprising a front cylinder block (1), a middle cylinder block (2), and a rear cylinder block (3) connected sequentially from front to back. A drill rod (4) and a piston (5) are disposed within the cylinder block. The rear end of the drill rod (4) is connected to the front end of the piston (5). The middle cylinder block (2) is provided with a first oil chamber (7) and a second oil chamber (8), which are connected to a valve control system. A reversing point (9) is provided on the piston (5). A signal groove (10) is provided on the middle cylinder block (2). The rear cylinder block (7) is filled with nitrogen gas. A [missing information - likely a device or feature] is provided on the rear cylinder block (7). An electromagnetic switch (11) for controlling the on / off of nitrogen gas and a piston position sensor (12) are provided. The electromagnetic switch (11) integrates a nitrogen pressure sensor. The piston position sensor (12) and the piston position sensor (12) are electrically connected to the signal input terminal of the excavator controller (13). The signal output terminal of the excavator controller (13) is electrically connected to the electromagnetic switch (11) and the control switch of the main pump in the valve control system. The excavator controller (13) is configured to perform the storage control method of the breaker hammer with piston reset function as described in any one of claims 1 to 4.

6. The hydraulic breaker with piston reset function according to claim 5, characterized in that: The excavator controller is electrically connected to the storage button.

7. The hydraulic breaker with piston reset function according to claim 5, characterized in that: The excavator controller is electrically connected to the display (14).

8. The hydraulic breaker with piston reset function according to claim 5, characterized in that: The front cylinder (1) is provided with a drill pin (6) to restrict the position of the drill rod (4).

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