Anti-freezing hydraulic safety valve device

Abstract

The invention discloses an anti-freezing hydraulic safety valve device which comprises a hydraulic safety valve, a temperature sensing liquid supplementing box and a solar heating device, and a hydraulic safety valve body is provided with a drainage device and an oil overflowing device and is used for automatically discharging accumulated water in a liquid storage cylinder and automatically recycling overflowing sealing oil. Automatic drainage controls accumulated water drainage by arranging a solid floater of which the weight is between that of sealing oil and that of sealing water of the same volume; the automatic overflow recovery device controls the liquid level to slowly rise to flow into an overflow oil recovery box through a flow speed sensing baffle; the hydraulic safety valve is installed on the top of the tank through a flange, the temperature sensing liquid supplementing box is installed on the upper portion of the tank, is lower than the hydraulic safety valve and is connected with the hydraulic safety valve through a pipeline, and the solar heating device is installed at the position, lower than the temperature sensing liquid supplementing box, of the tank and is connected with the temperature sensing liquid supplementing box through a pipeline.

Description

Technical Field

[0001] The invention relates to the field of oil and gas exploitation, storage and transportation, and in particular to an antifreeze hydraulic safety valve device. Background Art

[0002] Oil storage tanks and oil-water treatment tanks (referred to as tanks) are used in oil extraction, storage and transportation. In order to prevent overpressure, underpressure and open discharge of gas in the tank, a hydraulic safety valve needs to be installed on the top of the tank. For this reason, countries around the world have also formulated national standards to guide the application of hydraulic safety valves. Although the standards of various countries have been revised many times, the sealing fluid in the hydraulic safety valve is oil, and there has always been a design defect that water is easy to freeze in the valve body. Most countries have overcome this problem by strengthening inspections and timely troubleshooting in management operations. However, the manual inspection method is not only inefficient, but also fails to detect frozen water in time.

[0003] In the existing hydraulic safety valve, each time the sealing fluid is replenished or replaced, the separation cylinder of the hydraulic safety valve needs to be removed, which is a heavy labor. Summary of the invention

[0004] To this end, the present invention proposes an antifreeze hydraulic safety valve device, which can well solve the above problems.

[0005] In order to achieve the purpose of the present invention, the following technical solutions are adopted:

[0006] An antifreeze hydraulic safety valve device comprises a hydraulic safety valve, a temperature-sensitive fluid replenishment tank, and a solar heating device, wherein: the hydraulic safety valve is installed on the top of a tank through a flange, the temperature-sensitive fluid replenishment tank is installed on the upper part of the tank and is lower than the hydraulic safety valve, the temperature-sensitive fluid replenishment tank is connected to the hydraulic safety valve through a pipeline, the solar heating device is installed on the tank at a position lower than the temperature-sensitive fluid replenishment tank, and the solar heating device is connected to the temperature-sensitive fluid replenishment tank through a pipeline.

[0007] The antifreeze hydraulic safety valve device, wherein: the temperature-sensing liquid replenishing box is close to the tank wall, and the temperature-sensing liquid replenishing box is connected to the oil storage cylinder of the hydraulic safety valve through a liquid outlet pipe and a liquid inlet pipe.

[0008] The antifreeze hydraulic safety valve device, wherein: the solar heating device is connected to the temperature sensing liquid replenishing tank through a liquid outlet pipe and a liquid inlet pipe.

[0009] The antifreeze hydraulic safety valve device, wherein: an oil storage cylinder is provided at the lower part of the hydraulic safety valve, and the oil storage cylinder is filled with sealing liquid.

[0010] The antifreeze hydraulic safety valve device, wherein: the temperature sensing liquid replenishing tank and the solar heating device are filled with sealing liquid.

[0011] The antifreeze hydraulic safety valve device, wherein: the oil storage cylinder is provided with a transparent observation window.

[0012] The antifreeze hydraulic safety valve device, wherein: the separation cylinder is provided with an active joint which can move up and down.

[0013] The antifreeze hydraulic safety valve device is described, wherein: one side of the temperature-sensing liquid replenishing tank is connected to the oil storage cylinder through a liquid outlet pipe, the lower end of the liquid outlet pipe is connected to the upper liquid outlet of the liquid replenishing tank, and the upper end of the liquid outlet pipe is connected to the upper liquid inlet of the oil storage cylinder; the other side of the temperature-sensing liquid replenishing tank is connected to the oil storage cylinder through a liquid inlet pipe, the lower end of the liquid inlet pipe is connected to the middle liquid inlet of the temperature-sensing liquid replenishing tank, and the upper end of the liquid inlet pipe is connected to the lower liquid outlet of the oil storage cylinder.

[0014] The antifreeze hydraulic safety valve device is described, wherein: one side of the solar heating device is connected to the temperature-sensing liquid replenishing tank through a liquid outlet pipe, the lower end of the liquid outlet pipe is connected to the upper liquid outlet of the solar heating device, and the upper end of the liquid outlet pipe is connected to the middle liquid inlet of the temperature-sensing liquid replenishing tank; the other side of the solar heating device is connected to the temperature-sensing liquid replenishing tank through a liquid inlet pipe, the lower end of the liquid inlet pipe is connected to the lower liquid inlet of the solar heating device, and the upper end of the liquid inlet pipe is connected to the lower liquid outlet of the temperature-sensing liquid replenishing tank.

[0015] The outer wall of the hydraulic safety valve is provided with an insulation layer to reduce the heat loss of the sealing fluid.

[0016] The antifreeze hydraulic safety valve device, wherein: the tank is an oil storage tank, or an oil-water treatment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the antifreeze hydraulic safety valve structure;

[0018] Figure 2 It is a schematic diagram of the structure of the hydraulic safety valve and the oil spill recovery tank;

[0019] Figure 3 is a schematic diagram of the blocking device structure;

[0020] Figure 4 Schematic diagram of float switch structure

[0021] Figure 5 It is a schematic diagram of the movable joint of the separator cylinder. DETAILED DESCRIPTION

[0022] The following is combined with Figure 1-5 , the specific implementation modes of the present invention are described in detail. The implementation modes are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention. Obviously, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0023] "One embodiment" or "some embodiments" described in this specification means that one or more embodiments of the present invention include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized.

[0024] like Figure 1 As shown, the antifreeze hydraulic safety valve device includes a hydraulic safety valve 1, a temperature-sensitive fluid replenishment tank 2, and a solar heating device 3, wherein: the hydraulic safety valve 1 is installed on the top of the storage tank through a flange, the temperature-sensitive fluid replenishment tank 2 is installed on the upper part of the tank, and the position is lower than the hydraulic safety valve 1, the temperature-sensitive fluid replenishment tank 2 is connected to the hydraulic safety valve through a pipeline, and the solar heating device 3 is connected to the temperature-sensitive fluid replenishment tank through a pipeline, and is installed on the tank at a position lower than the temperature-sensitive fluid replenishment tank.

[0025] The tank is a petroleum storage tank, or an oil and water treatment tank.

[0026] The hydraulic safety valve 1 is provided with a separation cylinder 26 at the top and an oil storage cylinder 11 at the bottom. The separation cylinder 26 is inserted into the oil storage cylinder 11. The oil storage cylinder 11 is filled with sealing liquid. The outer wall of the oil storage cylinder 11 is provided with a transparent observation window (viewing window) 12 for observing the internal liquid capacity and state thereof. The temperature-sensing liquid replenishing tank 2 is arranged at the top of the storage tank, close to the tank wall. The temperature-sensing liquid replenishing tank 2 is filled with sealing liquid. One side of the temperature-sensing liquid replenishing tank 2 is connected to the oil storage cylinder 11 through a liquid outlet pipe 4. The lower end of the liquid outlet pipe 4 is connected to the upper liquid outlet of the liquid replenishing tank 2. The upper end of the liquid outlet pipe 4 is connected to the upper liquid inlet of the oil storage cylinder 11. The other side of the temperature-sensing liquid replenishing tank 2 is connected to the oil storage cylinder 11 through a liquid inlet pipe 5. The lower end of the liquid inlet pipe 5 is connected to the middle liquid inlet of the temperature-sensing liquid replenishing tank 2. The upper end of the liquid inlet pipe 5 is connected to the lower liquid outlet of the oil storage cylinder 11. A remote pressure gauge is installed on the side of the hydraulic safety valve separation cylinder 26 that bears the pressure in the tank.

[0027] The solar heating device 3 is filled with sealing liquid. One side of the solar heating device 3 is connected to the temperature-sensing liquid replenishing tank 2 through a liquid outlet pipe 4. The lower end of the liquid outlet pipe 4 is connected to the upper liquid outlet of the solar heating device 3, and the upper end of the liquid outlet pipe 4 is connected to the middle liquid inlet of the temperature-sensing liquid replenishing tank 2; the other side of the solar heating device 3 is connected to the temperature-sensing liquid replenishing tank 2 through a liquid inlet pipe 5. The lower end of the liquid inlet pipe 5 is connected to the lower liquid inlet of the solar heating device 3, and the upper end of the liquid inlet pipe 5 is connected to the lower liquid outlet of the temperature-sensing liquid replenishing tank 2.

[0028] A drain valve is provided at the bottom of the temperature-sensing liquid replenishment tank 2 and the solar heating device 3 to discharge the dirt or water deposited in the hydraulic safety valve. The temperature-sensing liquid replenishment tank 2, the solar heating device 2 inlet and outlet pipes and the hydraulic safety valve storage cylinder are provided with thermometers to observe the temperature of each part.

[0029] When replacing or replenishing the sealing liquid, the sealing liquid is discharged through the drain valve of the temperature-sensing liquid-making tank 2 or the solar heating device 3; the temperature-sensing liquid-making tank 2 and the solar heating device 3 are raised to add the sealing liquid into the hydraulic safety valve using the U-tube principle, and then the temperature-sensing liquid-making tank 2 and the solar heating device 3 are filled with liquid.

[0030] The sealing liquid mentioned above has a density less than that of water. Generally speaking, the sealing liquid is sealing oil. During operation, water vapor will inevitably enter the hydraulic safety valve 1, condense into water when it is cold, and mix into the sealing liquid, resulting in a deterioration of the sealing effect. For this reason, the present invention provides an automatic sewage discharge device.

[0031] The automatic sewage discharge device includes a tube body 13 and a float 14. The upper end of the tube body 13 is inserted into the oil storage cylinder 11 from the opening at the bottom of the oil storage cylinder 11, and the insertion point is sealed by a sealing ring; an opening 16 is opened on the tube wall of the tube body 13, and the lower part of the tube body 13 is exposed outside the oil storage cylinder 11, and a sewage discharge port 15 is provided at the bottom of the tube body 13; the tube body 13 is installed with a float 14 with the same diameter as the inner wall diameter of the tube body 13, and the float 14 is supported by a boss on the inner wall of the tube body 13 (not shown in the figure); the opening position of the opening 16 is when the float 14 is supported by the boss on the inner wall of the tube body 13, the opening 16 is closed by the float 14; the density of the float 14 is less than that of water and greater than that of the sealing liquid.

[0032] When working, the automatic sewage discharge device includes a tube body 13 extending into the oil storage cylinder 11. Since the density of the float 14 is greater than that of the sealing liquid, after the sealing liquid enters the tube body 13, the float 14 is in a position to close the opening; when water accumulates in the oil storage cylinder 11, the water rises to a certain height at the bottom of the cylinder and then enters the tube body 13. At this time, the float 14 floats up, opening the closed opening 16, and the accumulated water continuously enters the tube body 13 and is discharged from the sewage outlet 15 at the bottom of the tube body 13. As the accumulated water is discharged, the sealing liquid continuously enters the tube body 13, the float drops, and the opening is closed to stop the discharge.

[0033] like Figure 2 As shown, the antifreeze hydraulic safety valve device also includes an oil spill recovery device, which includes an oil spill recovery tank 19 and an oil spill pipe 18. The oil spill recovery tank 19 is arranged outside the oil storage cylinder 11, and an oil spill port 17 is opened in the middle of the wall of the oil storage cylinder 11. One end of the oil spill pipe 18 is connected to the oil spill port 17, and the other end is connected to the oil inlet at the top of the oil spill recovery tank 19. An oil outlet is opened at the bottom of the oil spill recovery tank 19, and an oil inlet is opened at the lower part of the wall of the oil storage cylinder 11. The oil outlet and the oil inlet are connected through an oil inlet pipe, and a one-way valve is installed in the oil inlet pipe to prevent the sealing oil in the oil storage cylinder 11 from flowing back into the oil spill recovery tank 19.

[0034] The oil storage cylinder 11 is provided with a blocking device 20 (flow rate sensing baffle), which includes an L-shaped sliding baffle and a suspension column 204. The L-shaped sliding baffle can be suspended on the suspension column 204 so as to slide up and down, and both the L-shaped sliding baffle and the suspension column 204 are arranged below the oil overflow port 17. Figure 3 As shown, the L-shaped sliding baffle includes a longitudinal plate 201 and a transverse plate 202. The transverse plate 202 is vertically connected to the upper edge of the longitudinal plate 201. The longitudinal plate 201 has a long hole 203. The hanging column 204 is fixed to the inner wall of the oil storage cylinder 11, and the longitudinal plate 201 is hung on the hanging column 204 through the long hole 203.

[0035] When the sealing oil slowly rises due to water accumulation in the oil storage cylinder, the sealing oil enters the oil spill recovery tank 19 through the oil spill pipe 18. When the pressure in the tank suddenly rises and the liquid level outside the liquid storage cylinder rises sharply, the sealing liquid pushes the horizontal plate 202 of the sliding baffle to move upward, and the vertical plate 201 blocks the inlet of the oil spill pipe 18 (oil spill port 17), and the sealing oil sprays out from the top of the liquid storage cylinder. After stabilization, the sliding baffle slides down and returns to its original position.

[0036] like Figure 2 , 4 As shown in Figures 5 and 6, a blocking device (pressure-sensing baffle) is provided inside the separation cylinder 26, which is used as the telescopic part of the separation cylinder 26. The blocking device includes an active joint 25 (or thrust baffle) and an elastic device such as a hanging elastic rubber 24; the thrust baffle 25 is cylindrical and supported by a metal such as a stainless steel plate, and its outer diameter is equal to the inner diameter of the separation cylinder 26; the thrust baffle 25 is an L-shaped plate, and its upper end is connected to the lower end of the hanging elastic rubber 24, and the lower end of the thrust baffle 25 hangs down beyond the lower end of the separation cylinder 26 and is immersed in the sealing oil; the upper end of the elastic rubber 24 is connected to the limit baffle 23, and one end of the limit baffle 23 is welded to the inner wall of the separation cylinder 26, and the other end protrudes horizontally, and the middle and rear part of the horizontal protruding end is connected to the upper end of the elastic rubber 24.

[0037] When the pressure in the tank is higher than a certain value, the sealing oil surges outward, and the sealing oil pushes the lower end of the thrust baffle 25, overcomes the elastic effect of the elastic rubber 24 and moves downward, so that the total length of its separation tube 26 becomes longer, increasing the height difference between the inner and outer sealing oils, and can increase the positive pressure value inside and outside the tank to a set high value; when the pressure in the tank is lower than a certain value, the sealing oil surges inward, and the sealing oil pushes the lower end of the thrust baffle 25, overcomes the elastic effect of the elastic rubber 24 and moves upward, so that the total length of the separation tube 26 is reduced, reducing the height difference between the inner and outer sealing oils, and can reduce the negative pressure value inside and outside the tank to not exceed the set low value. The above-mentioned blocking device can prevent the tank from being deflated under negative pressure due to excessive negative pressure, and can also increase the internal and external pressure difference as the pressure in the tank increases, so that the gas in the tank is quickly discharged.

[0038] In the above structure, the bottom of the oil spill recovery tank 19 is connected to the hydraulic safety valve oil storage cylinder 11, and a one-way valve is provided in the middle. When the hydraulic pressure of the recovery tank is higher than the hydraulic pressure of the hydraulic safety valve oil storage cylinder, the one-way valve opens and the recovery tank replenishes fluid to the oil storage cylinder; when the hydraulic pressure of the oil storage cylinder is higher than that of the recovery tank, the one-way valve closes.

[0039] A pressure gauge with local indication and remote transmission functions is installed on the top of the hydraulic safety valve separation cylinder, which will give an alarm in time when the tank pressure is abnormal and there is a danger of tank deflation or tank expansion.

[0040] When the antifreeze hydraulic safety valve device of the present invention is working, the temperature-sensing liquid replenishing box is close to the top of the tank, and the hydraulic safety valve is connected to the temperature-sensing liquid replenishing box that senses the temperature of the tank top. The liquid in the temperature-sensing liquid replenishing box is heated by heat conduction from the tank top. When the temperature is higher than the temperature of the liquid in the hydraulic safety valve, due to the effects of thermal power and gravity, the liquid in the temperature-sensing liquid replenishing box moves upward into the liquid storage cylinder, and the liquid in the liquid storage cylinder moves downward into the temperature-sensing liquid replenishing box, and the liquid in the liquid storage cylinder is heated by heat exchange.

[0041] During the day, due to the effect of thermal power, the liquid (sealing liquid) in the solar heating device receives sunlight and rises in temperature, moving upward into the temperature-sensitive liquid replenishment tank. The liquid (sealing liquid) in the temperature-sensitive liquid replenishment tank moves downward into the solar heating device, and heats the liquid in the temperature-sensitive liquid replenishment tank through heat exchange. At night, the solar heating device stops moving when the temperature is lower than the temperature of the temperature-sensitive liquid replenishment tank.

[0042] Through the present invention, the liquid in the liquid storage cylinder can be heated by making full use of solar energy and the temperature of the tank body during the day, and the liquid in the liquid storage cylinder can be heated by the temperature of the tank body at night, so that the hydraulic safety valve can be protected from freezing without external energy assistance. The liquid outlet pipe 4 and the liquid inlet pipe 5 can also be used to clean the oil storage cylinder without disassembling the hydraulic safety valve separation cylinder.

[0043] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An antifreeze hydraulic safety valve device, comprising a hydraulic safety valve, a temperature-sensing liquid replenishing tank, and a solar heating device, characterized in that: The hydraulic safety valve is installed on the top of the tank through a flange, the temperature-sensitive fluid-making tank is installed on the upper part of the tank and is lower than the hydraulic safety valve. The temperature-sensitive fluid-making tank is connected to the hydraulic safety valve through a pipeline. The solar heating device is installed on the tank at a position lower than the temperature-sensitive fluid-making tank. The solar heating device is connected to the temperature-sensitive fluid-making tank through a pipeline.

2. The antifreeze hydraulic safety valve device according to claim 1, characterized in that: The temperature-sensing liquid-replenishing tank is closely attached to the tank wall, and is connected to the oil storage cylinder of the hydraulic safety valve through a liquid outlet pipe and a liquid inlet pipe.

3. The antifreeze hydraulic safety valve device according to claim 1, characterized in that: The solar heating device is connected to the temperature-sensing liquid replenishing tank through a liquid outlet pipe and a liquid inlet pipe.

4. The antifreeze hydraulic safety valve device according to claim 1, characterized in that: An oil storage cylinder is provided at the lower part of the hydraulic safety valve, and the oil storage cylinder is filled with sealing liquid.

5. The antifreeze hydraulic safety valve device according to claim 3 is characterized in that: The temperature-sensing liquid replenishing tank and the solar heating device are filled with sealing liquid.

6. The antifreeze hydraulic safety valve device according to claim 4, characterized in that: The oil storage cylinder is provided with a transparent observation window.

7. The antifreeze hydraulic safety valve device according to claim 1, characterized in that: One side of the temperature-sensing liquid replenishing tank is connected to the oil storage cylinder through a liquid outlet pipe, the lower end of the liquid outlet pipe is connected to the upper liquid outlet of the liquid replenishing tank, and the upper end of the liquid outlet pipe is connected to the upper liquid inlet of the oil storage cylinder; the other side of the temperature-sensing liquid replenishing tank is connected to the oil storage cylinder through a liquid inlet pipe, the lower end of the liquid inlet pipe is connected to the middle liquid inlet of the temperature-sensing liquid replenishing tank, and the upper end of the liquid inlet pipe is connected to the lower liquid outlet of the oil storage cylinder.

8. The antifreeze hydraulic safety valve device according to claim 1, characterized in that: One side of the solar heating device is connected to the temperature-sensing liquid replenishing tank through a liquid outlet pipe, the lower end of the liquid outlet pipe is connected to the upper liquid outlet of the solar heating device, and the upper end of the liquid outlet pipe is connected to the middle liquid inlet of the temperature-sensing liquid replenishing tank; the other side of the solar heating device is connected to the temperature-sensing liquid replenishing tank through a liquid inlet pipe, the lower end of the liquid inlet pipe is connected to the lower liquid inlet of the solar heating device, and the upper end of the liquid inlet pipe is connected to the lower liquid outlet of the temperature-sensing liquid replenishing tank.

9. The antifreeze hydraulic safety valve device according to any one of claims 1 to 8, characterized in that: The tank is a petroleum storage tank, or an oil and water treatment tank.

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