Automatic pressure relief system of energy accumulator and engineering vehicle

Abstract

The utility model discloses an energy accumulator automatic pressure relief system and an engineering vehicle. The energy accumulator automatic pressure relief system comprises a gear handle position sensor, an engine rotating speed sensor, a vehicle speed sensor, a controller, an unloading electromagnetic valve and an energy accumulator. When the controller judges that input signals of the gear handle position sensor, the engine rotating speed sensor and the vehicle speed sensor meet the parking condition, the controller controls the unloading electromagnetic valve to act, the energy accumulator is made to communicate with the oil tank, and the automatic pressure relief function is completed. Through detection of different sensors, whether the vehicle meets normal flameout conditions or not can be judged more comprehensively, accidental flameout in the vehicle running process is avoided, the automatic pressure relief function of the energy accumulator 4 is triggered, emergency steering cannot be completed, and serious consequences are avoided.

Description

Technical Field

[0001] This utility model relates to an automatic pressure relief system for an accumulator, belonging to the technical field of mining dump trucks. Background Technology

[0002] Mining dump trucks are specialized heavy-duty vehicles used for short-distance transportation, widely applied in various open-pit mines, hydropower projects, railway and highway construction projects, and large-scale building projects. Mining dump trucks must be equipped with emergency steering devices to provide emergency steering when the normal steering power source fails or the engine stops working. Common emergency steering devices are generally accumulators. Because the accumulators in mining dump trucks store high pressure and have a pressure-holding function, if the accumulator is not depressurized when the vehicle is parked for maintenance, high-pressure oil may splash during pipeline repairs, or the driver may accidentally operate the steering wheel, causing the tires to spin. Both of these could potentially cause personal injury to personnel performing pipeline repairs or those near the tires. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an automatic pressure relief system for accumulators. When a vehicle meets parking conditions, the accumulator can automatically release pressure, reducing the risk of misoperation.

[0004] This utility model is achieved according to the following technical solution:

[0005] In a first aspect, this utility model provides an automatic pressure relief system for an accumulator, mainly used in engineering vehicles, including:

[0006] Gear shift lever position sensor, engine speed sensor, and vehicle speed sensor;

[0007] The controller's input ports are electrically connected to the gear lever position sensor, engine speed sensor, and vehicle speed sensor, respectively.

[0008] An unloading solenoid valve is connected between the steering device and the oil suction pump, and the control terminal of the unloading solenoid valve is electrically connected to the output port of the controller.

[0009] The accumulator is connected to the unloading solenoid valve. When the controller simultaneously detects signals that the gear is in parking position, the engine speed is 0, and the vehicle speed is 0, the controller controls the unloading solenoid valve to operate, so that the accumulator is connected to the fuel tank and completes the automatic pressure relief function. When the controller cannot simultaneously detect signals that the gear is in parking position, the engine speed is 0, and the vehicle speed is 0, the controller controls the unloading solenoid valve to operate, so that the accumulator is not connected to the fuel tank and the accumulator does not relieve pressure.

[0010] In some embodiments, the left end port of the unloading solenoid valve is connected to the oil inlet of the steering device, and the right end port is connected to the oil return port of the steering device; the accumulator is connected to the left end port of the unloading solenoid valve; the left end port of the unloading solenoid valve is connected to the oil suction pump, and the right end port of the unloading solenoid valve is connected to the oil tank.

[0011] In some embodiments, when the controller simultaneously detects signals that the gear is parked, the engine speed is 0, and the vehicle speed is 0, the controller controls the unloading solenoid valve to be energized. When the upper position of the unloading solenoid valve is connected to the circuit, the left and right oil ports of the unloading solenoid valve are connected. When the controller cannot simultaneously detect signals that the gear is parked, the engine speed is 0, and the vehicle speed is 0, the controller controls the unloading solenoid valve to be de-energized. When the lower position of the unloading solenoid valve is connected to the circuit, the left and right oil ports of the unloading solenoid valve are not connected.

[0012] Secondly, this utility model provides an engineering vehicle, including the aforementioned automatic pressure relief system for an accumulator.

[0013] In some embodiments, the engineering vehicle includes a mining dump truck.

[0014] The beneficial effects of this utility model are:

[0015] 1. The configured sensors are compatible with various data readings and provide more comprehensive automatic pressure relief condition judgment for the accumulator, ensuring stability and reliability;

[0016] 2. After the vehicle is turned off, the controller takes effect, and the accumulator pressure is automatically released through the unloading solenoid valve, which is convenient and quick;

[0017] 3. No manual operation is required, reducing the error rate and avoiding the safety hazards caused by human error;

[0018] 4. Improve vehicle safety and ensure the personal safety of personnel during maintenance. Attached Figure Description

[0019] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the attached diagram:

[0021] Figure 1 This is a schematic diagram of the automatic pressure relief system for the accumulator of a mining dump truck according to this utility model.

[0022] Attached diagram labels: 1. Fuel tank; 2. Fuel pump; 3. Unloading solenoid valve; 4. Accumulator; 5. Controller; 6. Gear shift lever position sensor; 7. Engine speed sensor; 8. Vehicle speed sensor; 9. Steering device.

[0023] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] like Figure 1 As shown, an automatic pressure relief system for an accumulator includes a gear shift lever position sensor 6, an engine speed sensor 7, a vehicle speed sensor 8, a controller 5, an unloading solenoid valve 3, and an accumulator 4. When the controller 5 determines that the input signals from the gear shift lever position sensor 6, engine speed sensor 7, and vehicle speed sensor 8 meet the parking conditions, the controller 5 controls the unloading solenoid valve 3 to activate, connecting the accumulator 4 to the fuel tank 1, thus completing the automatic pressure relief function. By detecting different sensors, a more comprehensive assessment can be made as to whether the vehicle meets the normal shutdown conditions, preventing accidental engine stalling during driving, which could trigger the automatic pressure relief function of the accumulator 4, preventing emergency steering and causing serious consequences.

[0027] The specific connection relationships of the above-mentioned components will be further explained below.

[0028] The left end of the unloading solenoid valve 3 is connected to the oil inlet of the steering device 9, and the right end of the unloading solenoid valve 3 is connected to the oil return port of the steering device 9; the accumulator 4 is connected to the left end of the unloading solenoid valve 3; the left end of the unloading solenoid valve 3 is connected to the oil suction pump 2, and the right end of the unloading solenoid valve 3 is connected to the oil tank 1; the oil suction pump 2 is connected to the oil tank 1.

[0029] It should be noted that in the actual design, the unloading solenoid valve 3 is integrated with other solenoid valves. Since these other solenoid valves are irrelevant to the technical solution of this utility model, they will not be described here. (Continue referring to...) Figure 1 As shown, the oil pump 2 draws oil from the oil tank 1, and the pressurized oil flows in from port P, acting on the left end of the unloading solenoid valve 3, the accumulator 4, and the oil inlet of the steering device 9. The oil return port of the steering device 9 is connected to the right end of the unloading solenoid valve 3, and then connected to the oil tank 1 through port T. The controller 5 is connected to the unloading solenoid valve 3 via a wiring harness. The controller 5 determines the energization / de-energization status of the unloading solenoid valve 3 by receiving signals from the gear shift lever position sensor 6, the engine speed sensor 7, and the vehicle speed sensor 8.

[0030] A further solution involves the following automatic pressure relief conditions for the accumulator: the gear lever is in park, the engine speed is 0, and the vehicle speed is 0. When all three conditions are met simultaneously, the accumulator 4 applies the automatic pressure relief function. If the three conditions cannot be met simultaneously, the accumulator 4 does not apply the automatic pressure relief function. For example, if an unexpected situation occurs while the vehicle is in motion and the engine stalls, the engine speed will be 0, but the other two conditions will not be met. In this case, the accumulator will not release pressure, effectively preventing situations where the vehicle cannot be turned in an emergency.

[0031] When controller 5 detects that the gear is in parking gear via gear lever position sensor 6, the engine speed is 0 via engine speed sensor 7, and the vehicle speed is 0 via vehicle speed sensor 8, and all three conditions are met simultaneously, controller 5 energizes unloading solenoid 3. The upper circuit of unloading solenoid valve 3 is connected, and the left and right sides are connected. The pressurized oil from the accumulator flows back to the oil tank 1 through port T after passing through unloading solenoid valve 3. When the above conditions are not met, controller 5 de-energizes unloading solenoid valve 3, the lower circuit of unloading solenoid valve 3 is disconnected, and the left and right ends of unloading solenoid valve 3 are not connected. The accumulator does not release pressure.

[0032] In summary, this utility model provides an automatic pressure relief system for accumulators, which has the following advantages:

[0033] 1. The configured sensors are compatible with various data readings and provide more comprehensive automatic pressure relief condition judgment for the accumulator, ensuring stability and reliability;

[0034] 2. After the vehicle is turned off, the controller takes effect, and the accumulator pressure is automatically released through the unloading solenoid valve, which is convenient and quick;

[0035] 3. No manual operation is required, reducing the error rate and avoiding the safety hazards caused by human error;

[0036] 4. Improve vehicle safety and ensure the personal safety of personnel during maintenance.

[0037] The engineering vehicle provided by this utility model is described below. The engineering vehicle described below can be referred to in correspondence with the automatic pressure relief system of the accumulator described above.

[0038] The present invention provides an engineering vehicle that may include an automatic accumulator depressurization system as described in any of the above embodiments.

[0039] The beneficial effects achieved by the engineering vehicle provided by this utility model are consistent with the beneficial effects achieved by the automatic pressure relief system for the accumulator provided by this utility model, so they will not be repeated here.

[0040] It should be noted that the aforementioned engineering vehicles can be mining dump trucks.

[0041] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0042] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An automatic pressure relief system for an accumulator, mainly used in engineering vehicles, characterized in that, include: Gear shift lever position sensor, engine speed sensor, and vehicle speed sensor; The controller's input ports are electrically connected to the gear lever position sensor, engine speed sensor, and vehicle speed sensor, respectively. An unloading solenoid valve is connected between the steering device and the oil suction pump, and the control terminal of the unloading solenoid valve is electrically connected to the output port of the controller. The accumulator is connected to the unloading solenoid valve. When the controller simultaneously detects signals that the gear is in parking position, the engine speed is 0, and the vehicle speed is 0, the controller controls the unloading solenoid valve to operate, so that the accumulator is connected to the fuel tank and completes the automatic pressure relief function. When the controller cannot simultaneously detect signals that the gear is in parking position, the engine speed is 0, and the vehicle speed is 0, the controller controls the unloading solenoid valve to operate, so that the accumulator is not connected to the fuel tank and the accumulator does not relieve pressure.

2. The accumulator automatic pressure relief system according to claim 1, characterized in that: The left end of the unloading solenoid valve is connected to the oil inlet of the steering device, and the right end is connected to the oil return port of the steering device; the accumulator is connected to the left end of the unloading solenoid valve; the left end of the unloading solenoid valve is connected to the oil suction pump, and the right end of the unloading solenoid valve is connected to the oil tank.

3. The automatic pressure relief system for an accumulator according to claim 2, characterized in that: When the controller simultaneously detects signals that the gear is in parking gear, the engine speed is 0, and the vehicle speed is 0, the controller controls the unloading solenoid valve to be energized. When the upper-level connection circuit of the unloading solenoid valve is reached, the left and right oil ports of the unloading solenoid valve are connected. When the controller cannot simultaneously detect signals that the gear is in parking position, the engine speed is 0, and the vehicle speed is 0, the controller controls the unloading solenoid valve to be in a de-energized state. When the lower position of the unloading solenoid valve is connected to the circuit, the left and right oil ports of the unloading solenoid valve are not connected.

4. An engineering vehicle, characterized in that: Includes the automatic pressure relief system for accumulators as described in any one of claims 1 to 3.

5. An engineering vehicle according to claim 4, characterized in that: The engineering vehicles include mining dump trucks.

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