A controllable vibration source hydraulic oil heating system and its control method

Abstract

This invention discloses a controllable seismic source hydraulic oil heating system and its control method. By integrating a new heating device into the original hydraulic oil heating circuit of the controllable seismic source, the invention preheats the hydraulic oil heating circuit during operation in extremely cold environments, effectively preventing the rupture of the nitrogen bladder in the high-pressure accumulator during pressurization after heating. The controllable seismic source hydraulic oil heating system provided by this invention is rationally designed, and the control method is simple and convenient to operate, saving time and effort. It effectively avoids the rupture of the nitrogen bladder in the high-pressure accumulator during construction in extremely cold environments, further improving the effective working time of the controllable seismic source vehicle in cold environments. It can also be effectively integrated with existing hydraulic oil heating systems in controllable seismic source vehicles, making it highly practical and easy to promote on a large scale. The controllable seismic source hydraulic oil heating system and its control method provided by this invention can be used in the hydraulic oil heating system of controllable seismic source vehicles and further applied to seismic exploration.

Description

Technical Field

[0001] This invention belongs to the field of seismic exploration technology and relates to a controllable source hydraulic oil heating technology, specifically a controllable source hydraulic oil heating system and its control method. Background Technology

[0002] Controlled seismic sources are a type of seismic signal excitation source used in seismic exploration. Due to their advantages over well-blasting and explosive methods, such as safety, environmental friendliness, high construction efficiency, and low construction costs, they are favored by many seismic exploration personnel. As seismic exploration has evolved from conventional 3D and fine 3D to the current high-precision 3D with "two widths and one height," the frequency and workload of controlled seismic sources have gradually increased, especially during the winter construction period when the workload increases dramatically. To ensure that controlled seismic sources can be heated up quickly after activation and reach their operating conditions under low-temperature conditions, heating operations are a necessary step.

[0003] The instruction manual for a controllable vibration source generally requires that when the hydraulic oil temperature is below 10°C, heating measures must be taken, and the next step of operation can only be performed when the hydraulic oil temperature reaches the operating temperature. The working principle diagram of the hydraulic oil circuit of a controllable vibration source in the prior art is shown below. Figure 1 As shown, the heating method mainly involves: opening the heating valve fully, allowing hydraulic oil from the hydraulic tank to enter the vibratory pump via the suction pipe, then passing through the high-pressure filter and the high-pressure manifold to the high-pressure relief valve. The heating valve, connected to the remote control port of the high-pressure relief valve, is manually adjusted to reduce the opening of the shut-off valve, which in turn reduces the opening of the main valve of the high-pressure relief valve. A portion of the hydraulic oil flows back to the hydraulic tank through the low-pressure pipe and cooler after passing through the high-pressure relief valve and the heating valve; the other portion flows through the high-pressure relief valve to the low-pressure manifold. The large amount of heat generated by the overflow from the high-pressure end to the low-pressure end heats the hydraulic oil. Once the hydraulic oil temperature in the system reaches the operating temperature, the heating valve is tightened, and the system enters the pressurization stage. Once the system reaches the operating pressure, construction work can begin.

[0004] Practical experience shows that nitrogen bladder rupture mainly occurs during the pressurization process after heating. This is because the heating and pressure cannot be precisely controlled. While the hydraulic oil temperature reaches the required level after heating, the accumulator housing and bladder are not preheated. When pressurization occurs, the high-temperature, high-pressure hydraulic oil rushes into the accumulator, causing the bladder to rupture. Therefore, it is urgent to research and develop a hydraulic oil heating system and technology to prevent nitrogen bladder rupture in high-pressure accumulators during controlled-source, frigid-environment construction. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a controllable vibration source hydraulic oil heating system and its control method, which can avoid the shortcomings of the nitrogen bladder of the high-pressure accumulator in the existing technology when the controllable vibration source vehicle is operating in a cold environment.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A controllable vibration source hydraulic oil heating system, wherein a new heating device is incorporated into the original heating oil circuit, the new heating device comprising a normally closed solenoid valve 1, a straight-through relief valve 2, a temperature control switch 3, and a low-temperature heating switch 4.

[0008] The original heating oil circuit high pressure relief valve 6 is connected to the hydraulic oil tank 19 through an oil circuit. The oil circuit is provided with normally closed solenoid valve 1 and straight-through relief valve 2 in sequence from the original heating oil circuit high pressure relief valve 6. The straight-through relief valve 2 is connected to the hydraulic oil tank 19 through the return oil pipe.

[0009] The electrical control connection of the new heating device is as follows: one end of the power supply of the normally closed solenoid valve 1 is connected to the ground wire, and the other end is connected in series with the low temperature heating switch 4 and the temperature control switch 3, and then connected to the 24V main power supply circuit.

[0010] The temperature control switch 3 is installed on the outside of the hydraulic oil tank 19.

[0011] The present invention also provides a control method for the controllable vibration source hydraulic oil heating system, wherein, according to different ambient temperature ranges, the low temperature heating switch 4 of the new heating device or the heating valve 5 of the original heating oil circuit is selected to start, and the high pressure relief valve 6 of the original heating oil circuit is adjusted to ensure that the hydraulic oil is heated without being impacted by high temperature and high pressure when the nitrogen bladder is pressurized in the system.

[0012] As a limitation on the control method of the above-mentioned controllable vibration source hydraulic oil heating system, the different ambient temperature ranges include two types of ambient temperature ranges: the first ambient temperature range is -40~-10℃, and the second ambient temperature range is -10~10℃.

[0013] When the ambient temperature is in the first ambient temperature range of -40~-10℃, the control method is as follows: the pressure of the direct-flow relief valve 2 in the new heating device is preset to 1350~1430PSI, the original heating oil circuit heating valve 5 is made to be fully open, the original heating oil circuit heating valve 5 is connected to the remote control port of the original heating oil circuit high-pressure relief valve 6, the low temperature heating switch 4 is closed, the original heating oil circuit heating valve 5 is manually adjusted to make its opening smaller, and then the main valve opening of the original heating oil circuit high-pressure relief valve 6 is made smaller, so that the hydraulic oil overflowing from the high-pressure end to the low-pressure end is heated. When the hydraulic oil temperature reaches the threshold of the temperature control switch 3, the temperature control switch 3 is automatically disconnected, the power supply of the new heating device is cut off, the new heating oil circuit is automatically cut off, the original heating oil circuit heating valve 5 is manually adjusted to the tightened state, and the system is pressurized to the working pressure.

[0014] When the ambient temperature is within the second ambient temperature range of -10~10℃, any of the following control methods can be selected. One control method is to set the original heating oil circuit heating valve 5 to the fully open state. The original heating oil circuit heating valve 5 is connected to the remote control port of the original heating oil circuit high-pressure relief valve 6. Manually adjust the original heating oil circuit heating valve 5 to reduce its opening, thereby reducing the opening of the main valve of the original heating oil circuit high-pressure relief valve 6. This causes the hydraulic oil overflowing from the high-pressure end to the low-pressure end to heat up. After the hydraulic oil temperature reaches the working temperature, manually adjust the original heating oil circuit heating valve 5 to the tightened state, and the system pressure is increased to the working pressure. Another control method is to preset the direct-flow relief valve in the new heating device. The pressure of flow valve 2 is 1350~1430 PSI. The original heating oil circuit heating valve 5 is fully open. The original heating oil circuit heating valve 5 is connected to the remote control port of the original heating oil circuit high pressure relief valve 6. The low temperature heating switch 4 is closed. The original heating oil circuit heating valve 5 is manually adjusted to reduce its opening. As a result, the main valve opening of the original heating oil circuit high pressure relief valve 6 is reduced, so that the hydraulic oil overflowing from the high pressure end to the low pressure end is heated. When the hydraulic oil temperature reaches the threshold of the temperature control switch 3, the temperature control switch 3 is automatically disconnected. The power supply to the electrical control circuit of the new heating device is cut off, and the new heating oil circuit is automatically cut off. The original heating oil circuit heating valve 5 is manually adjusted to the tightened state, and the system is pressurized to the working pressure.

[0015] Determining the preset pressure of the direct-flow relief valve in the new heating device is crucial. Treating nitrogen as an ideal gas, according to Moore's Law PV / T=C, at a constant volume, a 1°C increase in nitrogen temperature within the nitrogen bladder of the high-pressure accumulator corresponds to a 1 / 273 increase in pressure; conversely, a 1°C decrease in nitrogen temperature corresponds to a 1 / 273 decrease in pressure. Therefore, when the accumulator's nitrogen bladder is filled with nitrogen at 1500 PSI at room temperature (20°C), and the internal pressure of the accumulator is 1335 PSI to 1170 PSI at ambient temperatures of -10°C to -40°C, the preset pressure of the direct-flow relief valve must be slightly higher than the preset heating pressure of the accumulator's nitrogen bladder to ensure hydraulic oil can enter the bladder. Simultaneously, the preset pressure of the direct-flow relief valve should not be too high to avoid excessive pressure differential impacting the accumulator's nitrogen bladder and causing damage.

[0016] By adopting the above technical solution, the technical progress achieved by this invention compared with the prior art is as follows:

[0017] ①This invention incorporates a new heating device into the original heating circuit of the hydraulic oil of the controllable vibration source. When the ambient temperature is below -10℃, the new heating device is activated to preheat the nitrogen bladder of the high-pressure accumulator. This solves the problem of the nitrogen bladder of the high-pressure accumulator rupturing when the controllable vibration source vehicle is heated and pressurized in cold environments, and further improves the effective working time of the controllable vibration source vehicle in cold environments.

[0018] ② In this invention, a straight-through relief valve with a preset pressure of 1350~1430 PSI is set in the new heating device. The added solenoid valve plays the role of constant pressure relief, pressure stabilization, and system unloading, thereby indirectly protecting the nitrogen bladder of the high-pressure accumulator. In the new heating device, the temperature control switch is installed on the outside of the hydraulic oil tank. The purpose is to more accurately sense the average temperature of the oil in the tank. If the temperature control switch is set in the oil circuit, there is a risk that the new heating oil circuit will be automatically cut off when the local pipeline near the temperature control switch reaches the threshold of the temperature control switch but the average oil temperature in the tank has not reached the working temperature.

[0019] ③ The hydraulic oil heating system provided by the present invention is an improvement on the original heating system. It does not affect the operation of the original heating method of the controllable vibration source when the equipment is working in non-extremely cold weather. At the same time, it can be effectively connected with the existing controllable vibration source vehicle oil circuit heating system in the field. It is highly practical and easy to promote on a large scale.

[0020] ④ The new heating oil circuit of the present invention is reasonably designed. When controlling the controllable vibration source hydraulic oil heating system, the new heating oil circuit can be started by operating the switch in the cab. The operation is simple and convenient, saving time and effort.

[0021] In summary, the controllable vibration source hydraulic oil heating system provided by this invention is reasonably designed, and the control method is simple and convenient to operate, saving time and effort. It can effectively avoid the phenomenon of nitrogen bladder rupture of high-pressure accumulator caused by pressurization after heating, further improving the effective working time of the controllable vibration source vehicle in cold environments. It does not affect the operation of the original heating method of the controllable vibration source when the equipment is constructed in non-extremely cold weather. It can also be effectively connected with the existing controllable vibration source vehicle oil circuit heating system in the field. It is highly practical and easy to promote on a large scale.

[0022] The controllable seismic source hydraulic oil heating system and its control method provided by this invention can be used in the hydraulic oil heating system of a controllable seismic source vehicle, and can be further applied to seismic exploration. Attached Figure Description

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] Figure 1 This is a schematic diagram of the hydraulic oil circuit of a controllable vibration source in the background technology of this invention;

[0025] Figure 2 This is a schematic diagram of the hydraulic oil heating system for the controllable vibration source in Embodiment 1 of the present invention.

[0026] Figure 3 This is a circuit diagram of the controllable vibration source hydraulic oil heating system in Embodiment 1 of the present invention.

[0027] In the diagram, 1-Normally closed solenoid valve; 2-Straight-through relief valve; 3-Temperature control switch; 4-Low-temperature heating switch; 5-Original heating oil circuit heating valve; 6-Original heating oil circuit high-pressure relief valve; 7-High-pressure oil filter; 8-Vibration high-pressure gauge; 9-High-pressure accumulator; 10-Low-pressure accumulator; 11-Vibration low-pressure gauge; 12-Low-pressure oil filter; 13-Low-pressure relief valve; 14-Vibration pump; 15-Drive pump; 16-Auxiliary pump; 17-Speed ​​control valve; 18-Cooler; 19-Hydraulic oil tank. Detailed Implementation

[0028] The present invention will be further described in detail below through specific embodiments. It should be understood that the described embodiments are preferred examples of the present invention and are only used to explain the present invention and do not limit the present invention.

[0029] Example 1: A controllable vibration source hydraulic oil heating system

[0030] This embodiment describes a controllable vibration source hydraulic oil heating system. The oil circuit diagram of this heating system is shown below. Figure 2 As shown, a new heating device is connected to the original heating oil circuit. The new heating device includes a normally closed solenoid valve 1, a straight-through overflow valve 2, a temperature control switch 3, and a low-temperature heating switch 4.

[0031] The original heating oil circuit high pressure relief valve 6 is connected to the hydraulic oil tank 19 through an oil circuit. The oil circuit is provided with normally closed solenoid valve 1 and straight-through relief valve 2 in sequence from the original heating oil circuit high pressure relief valve 6. The straight-through relief valve 2 is connected to the hydraulic oil tank 19 through the return oil pipe.

[0032] The circuit diagram of the new heating device of this invention is as follows: Figure 3 As shown, the electrical control connection is as follows: one end of the power supply of the normally closed solenoid valve 1 is connected to the ground wire, and the other end is connected in series with the low temperature heating switch 4 and the temperature control switch 3, and then connected to the 24V main power supply circuit.

[0033] The temperature control switch 3 is installed on the outside of the hydraulic oil tank 19 to sense the temperature of the hydraulic oil tank.

[0034] The activation of the new heating device is controlled by the low-temperature heating switch 4; the low-temperature heating switch 4 is located inside the controllable vibration source vehicle, and in this embodiment, a 30°C temperature control switch is selected.

[0035] Example 2: Control method for a controllable vibration source hydraulic oil heating system

[0036] Depending on the different ambient temperature ranges, select either the low-temperature heating switch 4 of the new heating device or the heating valve 5 of the original heating oil circuit, and adjust the high-pressure relief valve 6 of the original heating oil circuit to ensure that the hydraulic oil is heated without being impacted by high temperature and high pressure when the nitrogen bladder is pressurized in the system.

[0037] When the ambient temperature is within the range of -40~-10℃, the control method is as follows: The pressure of the direct-flow relief valve 2 in the new heating device is preset to 1350~1430 PSI. The original heating oil circuit heating valve 5 is set to the fully open state. The original heating oil circuit heating valve 5 is connected to the remote control port of the original heating oil circuit high-pressure relief valve 6. The low-temperature heating switch 4 is closed, and the original heating oil circuit heating valve 5 is manually adjusted to reduce its opening, thereby reducing the opening of the main valve of the original heating oil circuit high-pressure relief valve 6. This causes the hydraulic oil overflowing from the high-pressure end to the low-pressure end to heat up. When the hydraulic oil temperature reaches the threshold of the temperature control switch 3, the temperature control switch 3 automatically disconnects, the electrical control circuit of the new heating device is de-energized, and the new heating oil circuit is automatically cut off, achieving hydraulic oil heating and accumulator preheating. The original heating oil circuit heating valve 5 is manually adjusted to the tightened state, the system pressure is increased to the working pressure, and the controllable vibration source vehicle can begin construction.

[0038] When the ambient temperature is within the range of -10~10℃, any control method can be selected. One control method is as follows: the original heating oil circuit heating valve 5 is set to the fully open state. The original heating oil circuit heating valve 5 is connected to the remote control port of the original heating oil circuit high pressure relief valve 6. The original heating oil circuit heating valve 5 is manually adjusted to reduce the opening, which in turn reduces the opening of the main valve of the original heating oil circuit high pressure relief valve 6. This causes the hydraulic oil overflowing from the high pressure end to the low pressure end to heat up. After the hydraulic oil temperature reaches the working temperature, the original heating oil circuit heating valve 5 is set to the tightened state, and the system is pressurized to the working pressure.

[0039] Another control method is as follows: The pressure of the direct-flow relief valve 2 in the new heating device is preset to 1350~1430 PSI. The original heating oil circuit heating valve 5 is set to the fully open state. The original heating oil circuit heating valve 5 is connected to the remote control port of the original heating oil circuit high-pressure relief valve 6. The low-temperature heating switch 4 is closed, and the original heating oil circuit heating valve 5 is manually adjusted to reduce the opening. This reduces the opening of the main valve of the original heating oil circuit high-pressure relief valve 6, causing the hydraulic oil overflowing from the high-pressure end to the low-pressure end to heat up. When the hydraulic oil temperature reaches the threshold of the temperature control switch 3, the temperature control switch 3 is automatically disconnected, the electrical control circuit of the new heating device is de-energized, the new heating oil circuit is automatically cut off, and the original heating oil circuit heating valve 5 is manually adjusted to the tightened state. The system is then pressurized to the working pressure.

[0040] It should be noted that the heating valve 5 in the original heating oil circuit is actually a shut-off valve. Because there is only one heating oil circuit in the original heating system, closing this shut-off valve achieves the heating of the hydraulic oil. Therefore, some people skilled in the art call it a heating valve.

[0041] For example, the hydraulic oil heating system manufactured according to Example 1 was installed on a BV-620LF type controllable vibration source 71361 in a repair shop. On September 12, 2021, an experiment was conducted in a non-winter environment where heating was not required. The results showed that the installed heating device had no effect on the hydraulic system of the controllable vibration source. On November 8, 2021, an experiment was conducted in a winter environment. The results showed that: when the new heating device was not turned on, it had no effect on the original heating oil circuit; when the new heating device was started, it could work in conjunction with the original heating method to raise the temperature and preheat the accumulator, preventing damage to the nitrogen bladder of the high-pressure accumulator; starting on December 8, 2021, in an extremely cold environment during a field project experiment with an average daily temperature of -15°C, the new heating device was started to complete the heating operation without any failure of the high-pressure accumulator nitrogen bladder rupture, demonstrating good implementation results.

[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all embodiments here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

Claims

1. A controllable vibration source hydraulic oil heating system, characterized in that: A new heating oil circuit is connected to the original heating oil circuit. The original heating oil circuit includes the original heating oil circuit heating valve (5) and the original heating oil circuit high pressure relief valve (6). The new heating oil circuit includes a normally closed solenoid valve (1), a straight-through relief valve (2), a temperature control switch (3), and a low temperature heating switch (4). The original heating oil circuit high pressure relief valve (6) and hydraulic oil tank (19) are connected through the new heating oil circuit. The new heating oil circuit is provided with a normally closed solenoid valve (1) and a straight-through relief valve (2) in sequence from the original heating oil circuit high pressure relief valve (6). The straight-through relief valve (2) is connected to the hydraulic oil tank (19) through the return oil pipe. The electrical control connection of the new heating oil circuit is as follows: one end of the power supply of the normally closed solenoid valve (1) is connected to the ground wire, and the other end is connected in series with the low temperature heating switch (4), the temperature control switch (3), and then connected to the 24V main power supply circuit. The temperature control switch (3) is installed on the outside of the hydraulic oil tank (19); It includes two ambient temperature ranges: the first is -40 to -10℃, and the second is -10 to 10℃. When the ambient temperature is in the first ambient temperature range of -40~-10℃, the control method is: select the low temperature heating switch (4) of the new heating oil circuit and the heating valve (5) of the original heating oil circuit. When the ambient temperature is in the second ambient temperature range of -10~10℃, any of the following control methods can be selected. One control method is to select to start the original heating oil circuit heating valve (5); the other control method is to select to start the low temperature heating switch (4) of the new heating oil circuit and the original heating oil circuit heating valve (5). Adjust the high-pressure relief valve (6) of the original heating oil circuit to ensure that the hydraulic oil is heated without being impacted by high temperature and high pressure when the nitrogen bladder is pressurized in the system.

2. The control method for the controllable vibration source hydraulic oil heating system according to claim 1, characterized in that, When the ambient temperature is in the first ambient temperature range of -40~-10℃, the control method is as follows: the pressure of the direct-flow relief valve (2) in the new heating oil circuit is preset to 1350~1430PSI, the original heating oil circuit heating valve (5) is made to be fully open, the original heating oil circuit heating valve (5) is connected to the remote control port of the original heating oil circuit high pressure relief valve (6), the low temperature heating switch (4) is closed, the original heating oil circuit heating valve (5) is manually adjusted to make its opening smaller, and then the main valve opening of the original heating oil circuit high pressure relief valve (6) is made smaller, so that the hydraulic oil overflowing from the high pressure end to the low pressure end is heated. When the hydraulic oil temperature reaches the threshold of the temperature control switch (3), the temperature control switch (3) is automatically disconnected, the electrical control circuit of the new heating oil circuit is de-energized, the new heating oil circuit is automatically cut off, the original heating oil circuit heating valve (5) is manually adjusted to the tightened state, and the system is pressurized to the working pressure. When the ambient temperature is in the second ambient temperature range of -10~10℃, any of the following control methods can be selected. One control method is: set the original heating oil circuit heating valve (5) to the fully open state. The original heating oil circuit heating valve (5) is connected to the remote control port of the original heating oil circuit high pressure relief valve (6). Manually adjust the original heating oil circuit heating valve (5) to reduce its opening, thereby reducing the opening of the main valve of the original heating oil circuit high pressure relief valve (6), so that the hydraulic oil overflowing from the high pressure end to the low pressure end is heated. After the hydraulic oil temperature reaches the working temperature, manually adjust the original heating oil circuit heating valve (5) to the tightened state, and the system pressure is increased to the working pressure. Another control method is: preset the pressure of the straight-through relief valve (2) in the new heating oil circuit to 1350~1430PSI, set the original heating oil circuit heating valve (5) to the fully open state, and connect the original heating oil circuit heating valve (5) to the remote control port of the original heating oil circuit high pressure relief valve (6). Connect the flow valve (6) to the remote control port, close the low temperature heating switch (4), manually adjust the original heating oil circuit heating valve (5) to make its opening smaller, and then the main valve opening of the original heating oil circuit high pressure relief valve (6) becomes smaller, so that the hydraulic oil overflowing from the high pressure end to the low pressure end is heated. When the hydraulic oil temperature reaches the threshold of the temperature control switch (3), the temperature control switch (3) is automatically disconnected, the electrical control circuit of the new heating oil circuit is de-energized, the new heating oil circuit is automatically cut off, manually adjust the original heating oil circuit heating valve (5) to the tightened state, and the system is pressurized to the working pressure.

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