Pressure stabilizing device and method and pressure self-adaptive regulating valve

Abstract

The invention discloses a pressure stabilizing device and method and a pressure self-adaptive regulating valve, the pressure stabilizing device comprises a pressure stabilizing tank and a flow stabilizing tank, and further comprises a self-adaptive regulating valve; the self-adaptive regulating valve, the pressure stabilizing tank and the flow stabilizing tank are communicated in sequence; the pressure self-adaptive regulating valve comprises a valve body, and an opening degree regulating mechanism, an air inlet regulating piston and an opening degree limiting mechanism are sequentially arranged in the valve body from top to bottom. A three-stage pressure stabilizing structure of pressure self-adaptive regulating valve feedback pressure regulation, pressure stabilizing tank energy absorption pressure stabilization, flow stabilizing tank partition plate flow stabilization and the like is adopted, air pressure stabilization is achieved, and pressure fluctuation is eliminated; the pressure self-adaptive regulating valve adopts a feedback mode to automatically regulate the size of an opening, so that the pressure is corrected and regulated in real time; the surge tank is of an air bag type structure, absorbs energy when the airflow pressure is high and releases energy when the airflow pressure is low, pressure pulsation is effectively eliminated, and the air pressure is kept stable.

Description

Technical Field

[0001] The present invention relates to the technical field of gas transportation, and particularly to a pressure stabilizing device, its method, and a pressure self-adaptive regulating valve. Background Art

[0002] The associated gas in the oilfield casing is produced together with the crude oil. It is a combustible gas rich in the crude oil and is produced simultaneously with the crude oil. During the production process of the oil well, when the bottom-hole pressure is lower than the saturation pressure of the crude oil, natural gas is separated from the crude oil. A part of the separated natural gas is produced along with the liquid flow into the pump chamber of the sucker rod pump, and a part enters the annulus between the casing and the tubing to form casing gas, forming a gas column with a certain pressure in the upper part. In actual production, in order to prevent the casing pressure from being too high and causing the submergence depth of the sucker rod pump to be too low, it is necessary to regularly release the casing gas to reduce the impact of the gas on the sucker rod pump, so that the sucker rod pump maintains a certain submergence depth and production pressure difference, thereby achieving the purpose of improving the pump efficiency and increasing the production.

[0003] At present, there are mainly three common means for recycling the casing gas. One is to enter the crude oil or gas pipeline for unified utilization by using its own energy or pressurization method; the second is to directly burn the casing gas on-site for heating on-site storage oil tanks, circulating water tanks, etc.; the third is to directly generate electricity from the casing gas for on-site equipment use or feed into the power grid. The latter two recycling methods require stable gas flow and pressure, but the casing gas fluctuates greatly due to the influence of the oil well production conditions, which is likely to cause equipment shutdown and other situations.

[0004] Publication (Announcement) No.: CN107091070A discloses an associated gas recovery device for oilfield casing, including a gas-liquid separation tank. The gas-phase outlet of the gas-liquid separation tank is connected to a three-way valve through a first pipeline. The first outlet of the three-way valve is connected to a first intermediate buffer tank through a second pipeline. A first electric valve is provided on the second pipeline. The first electric valve is connected to the first intermediate buffer tank through a third pipeline. The first intermediate buffer tank is connected to a compressor unit through a fourth pipeline. The compressor unit is connected to a second intermediate buffer tank through a fifth pipeline. The second intermediate buffer tank is connected to the oil gathering main pipeline through a sixth pipeline. A first check valve is provided on the sixth pipeline in the direction from the second intermediate buffer tank to the oil gathering main pipeline.

[0005] This prior art uses multiple buffer tanks to buffer the pressure, which is different from the structure of the present invention.

[0006] Publication (Announcement) Number: CN113308271B discloses an associated gas pressure regulating system device for an oilfield station and its pressure regulating method. The system device includes a gas-liquid separation device, a crude oil dehydration device, and a drying device. The gas outlet end of the gas-liquid separation device is connected to the drying device through a first gas outlet pipeline. The liquid outlet pipeline of the gas-liquid separation device is connected to the crude oil dehydration device. Along the gas flow direction on the first gas outlet pipeline, a first pressure regulating valve group and a pressure reducing valve group are arranged in sequence. Between the first pressure regulating valve group and the pressure reducing valve group, a supplementary gas pipeline is externally connected to the first gas outlet pipeline. The supplementary gas pipeline is connected to the crude oil dehydration device, and an inlet supplementary gas valve group is arranged on the supplementary gas pipeline. The crude oil dehydration device is connected to the first gas outlet pipeline through a second gas outlet pipeline, and a second pressure regulating valve group is arranged on the second gas outlet pipeline. The outlet end of the drying device is connected to an associated gas distribution valve group. Through the combined use of valve groups, the pressure inside the system device is stabilized, and it has the characteristics of simple structure, easy operation, and high safety.

[0007] This prior art uses a valve group to buffer the pressure, which has a different structure from that of the present invention.

[0008] Publication (Announcement) Number: CN219388621U discloses a self-acting pressure regulating valve, including a valve body. In the middle of the valve body, a flow guide plate is arranged. In the middle of the top of the flow guide plate, a flow port is opened. In the middle of the top of the valve body, an adjustment box is arranged. In the middle of the bottom of the adjustment box, a connecting rod is sleeved. The bottom of the connecting rod extends to the inside of the valve body and is provided with a blocking block. The top of the connecting rod extends to the inside of the adjustment box and is provided with a push plate. In the middle of the top of the push plate, a guide rod is arranged.

[0009] This prior art cannot set the initial elastic force of the spring and has a different structure from that of the present invention.

[0010] In summary, the technical solutions, the technical problems to be solved, and the beneficial effects of the above disclosed technologies are all different from those of the present invention. For more technical features, technical problems to be solved, and beneficial effects of the present invention, there is no technical inspiration in the above disclosed technical documents. Summary of the Invention

[0011] Aiming at the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a pressure stabilizing device, its method, and a pressure self-adaptive regulating valve to achieve stable flow and stable air pressure of the casing gas.

[0012] To achieve the above purpose, the present invention adopts the following technical solutions:

[0013] A pressure stabilizing device includes a pressure stabilizing tank, a flow stabilizing tank, and also includes an adaptive regulating valve; the adaptive regulating valve, the pressure stabilizing tank, and the flow stabilizing tank are connected in sequence; the pressure adaptive regulating valve includes a valve body, and an opening regulating mechanism, an air inlet regulating piston, and an opening limiting mechanism are sequentially arranged in the valve body from top to bottom.

[0014] Further, a valve cavity that is thick at the top and thin at the bottom is arranged in the valve body, a first air inlet and a first air outlet that are communicated with the valve cavity are respectively arranged at the front end and the rear end of the valve body, and the first air inlet is arranged below the first air outlet.

[0015] Specifically, the air inlet regulating piston is arranged in the thin part of the valve cavity and can move up and down. The upper end of the air inlet regulating piston is connected to the opening regulating mechanism arranged in the thick part of the valve cavity, and the lower end of the air inlet regulating piston is connected to the opening limiting mechanism passing through the valve body.

[0016] Further, the air inlet regulating piston is provided with a dumbbell-shaped through hole that is thin in the middle and thick at both ends, and the middle thin hole of the dumbbell-shaped through hole is an air flow channel.

[0017] Specifically, the first air outlet is always completely communicated with the dumbbell-shaped through hole.

[0018] Further, the opening regulating mechanism includes a large piston, and the large piston is connected to the upper end of the air inlet regulating piston.

[0019] Specifically, the large piston and the upper end of the air inlet regulating piston divide the thick part of the valve cavity into a large piston cavity above the large piston and an annular cavity below.

[0020] Specifically, a large piston cavity air flow channel communicated with the air flow channel is arranged in the large piston and the air inlet regulating piston.

[0021] Specifically, the valve body is provided with an annular cavity air flow channel that communicates the annular cavity with the first air outlet.

[0022] Further, the opening limiting mechanism includes a spring, a pressing plate, an adjusting rod, and a locking nut.

[0023] Specifically, a pressure feedback cavity is formed between the lower end face of the air inlet regulating piston and the valve body, and the spring and the pressing plate are arranged in the feedback cavity.

[0024] Specifically, the upper end of the spring is connected to the lower end of the air inlet regulating piston, the upper end of the pressing plate is connected to the lower end of the spring, and the adjusting rod passes through the valve body and is movably connected to the pressing plate.

[0025] Specifically, the adjusting rod is threadedly connected to the valve body and can be rotated up and down. The locking nut locks the adjusting rod and the valve body, and the adjusting rod is provided with an adjusting handle outside the valve body.

[0026] Specifically, a feedback joint is provided in the pressure feedback chamber of the valve body.

[0027] Further, a first seal is provided between the intake port adjusting piston and the inner wall of the valve chamber, and the large piston is connected to the intake port adjusting piston by means of threads or other connection methods;

[0028] Specifically, the valve body on the large piston chamber is a gland, and the gland is connected to the valve body main body by means of threads or bolts, and a second seal is provided between the gland and the valve body main body.

[0029] Further, the pressure stabilizing tank is of an oval structure, with an airbag provided inside. An inflation port is provided at the upper end of the pressure stabilizing tank, a deflation and sewage discharge port is provided at the lower end of the pressure stabilizing tank, and a second intake port and a second outlet port are respectively provided at the front end and the rear end of the tank wall of the pressure stabilizing tank.

[0030] Further, the airbag is filled with inert gas through the inflation port. The pressure of the filled inert gas is not less than 20% of the highest gas pressure of the casing gas and not higher than 90% of the lowest pressure of the casing gas. When the gas flows through the pressure stabilizing tank, the airbag is compressed to form an air chamber.

[0031] Further, upper partitions and lower partitions are arranged in a staggered manner inside the flow stabilizing tank, and at least one group of upper partitions and lower partitions is provided;

[0032] Specifically, the lower partition is connected to the bottom plate of the flow stabilizing tank, and the air flow passes through the gap between the lower partition and the top plate of the flow stabilizing tank; the upper partition is connected to the top plate of the flow stabilizing tank, and the air flow passes through the gap between the upper partition and the bottom plate of the flow stabilizing tank;

[0033] Specifically, a third intake port is provided on the tank wall of the flow stabilizing tank adjacent to the lower partition, and a third outlet port is provided on the tank wall adjacent to the upper partition. The third intake port is below the third outlet port;

[0034] Specifically, air vent and sewage discharge ports are provided between the side plate of the flow stabilizing tank and the lower partition and between the lower partitions; a safety valve is installed on the top plate of the flow stabilizing tank;

[0035] Specifically, the outer shape of the flow stabilizing tank is a cylindrical or rectangular or square structure.

[0036] Further, an intake pipe and an outlet pipe are also included;

[0037] Specifically, a first gas check valve and a first pressure gauge are provided on the intake pipe, and the intake pipe is connected to the first intake port of the pressure self - adapting regulating valve;

[0038] Specifically, the pressure self - adapting regulating valve is communicated with the pressure stabilizing tank through a first connecting pipe. The front end of the first connecting pipe is connected to the first air outlet of the pressure self - adapting regulating valve, and the rear end of the first connecting pipe is connected to the second air inlet of the pressure stabilizing tank. A second check valve is arranged on the first connecting pipe.

[0039] Specifically, the pressure stabilizing tank is communicated with the flow stabilizing tank through a second connecting pipe. The front end of the second connecting pipe is connected to the second air outlet of the pressure stabilizing tank, and the rear end of the second connecting pipe is connected to the third air inlet of the flow stabilizing tank. A third check valve is arranged on the second connecting pipe.

[0040] Specifically, the air outlet pipe is connected to the third air outlet of the pressure stabilizing tank. A fourth check valve and a second pressure gauge are arranged on the air outlet pipe. The air outlet pipe is connected to the feedback joint of the pressure self - adapting regulating valve through a pressure feedback pipe, and then is communicated with the pressure feedback cavity.

[0041] To achieve the above - mentioned purpose, the present invention adopts the following technical solutions:

[0042] A method for using a pressure stabilizing device, comprising the following steps:

[0043] S1. Before starting the pressure stabilizing device, rotate the adjusting handle of the pressure self - adapting regulating valve to the lowest end, and the spring is in a free state; a certain pressure of inert gas is pre - filled into the air bag in the pressure stabilizing tank through the inflation port.

[0044] S2. Start the device. The casing gas enters the pressure self - adapting regulating valve from the inlet pipe. The air flow enters the first air outlet through the air flow channel. At the same time, the air flow enters the large piston cavity through the air flow channel of the large piston cavity, enters the annular cavity through the air flow channel of the annular cavity. Under the action of air pressure, the intake port adjusting piston moves towards the spring direction, and the air intake port increases.

[0045] The air flow enters the pressure stabilizing tank. Under the action of gas pressure, the air bag is compressed until the air pressure in the air bag is balanced with the pressure in the air cavity.

[0046] Subsequently, the casing gas enters the flow stabilizing tank. The air flow passes through the air flow channels separated by the upper partition plate and the lower partition plate, and finally enters the air outlet pipe.

[0047] The gas in the air outlet pipe enters the pressure feedback cavity through the pressure feedback pipe. Under the action of the air pressure in the air outlet pipe, the intake port adjusting piston moves towards the direction of the large piston until the air pressure acting force on the large piston in the large piston cavity is balanced with the air pressure acting forces in the annular cavity and the pressure feedback cavity.

[0048] S3. Rotate the adjusting handle to adjust the elastic force of the spring, and at the same time observe the reading of the pressure gauge until the required pressure value is reached.

[0049] S4. When the pressure in the intake pipe suddenly increases, the air pressures in the large piston chamber and the annular chamber increase, while the air pressure in the pressure feedback chamber remains unchanged. The acting force of the air pressure in the large piston chamber on the large piston increases, and the intake port regulating piston moves towards the spring direction. The spring is compressed, and the air intake port increases until the increased acting force on the large piston is equal to the increased elastic force of the spring.

[0050] Subsequently, the air flow enters the pressure stabilizing tank. As the air pressure increases, the airbag contracts to absorb energy, reducing the impact of pressure pulsation on the pipeline air pressure. After the air pressures inside and outside the airbag are equal, the pressure is transmitted downward.

[0051] After the air flow enters the flow stabilizing tank, the arranged partition increases the length of the air flow channel. At the same time, the partition can slow down the impact of air pressure pulsation, making the pressure at the air outlet more stable.

[0052] When the increased pressure is transmitted from the pressure feedback pipe to the pressure feedback chamber, the air pressure in the pressure feedback chamber increases, the force on the large piston changes, and the intake port regulating piston moves towards the large piston direction, forming a new balance. The air intake port decreases, the pressure at the first air outlet decreases, the air pressures in the large piston chamber and the annular chamber decrease, and the air intake port further decreases.

[0053] After the decreased air pressure is transmitted to the pressure feedback chamber, the intake port regulating piston moves towards the large piston spring direction, and the air intake port increases.

[0054] After the air pressure is continuously transmitted multiple times, the position of the intake port regulating piston is adjusted in real time according to the pressure change, and finally the outlet pressure is stabilized at the set value.

[0055] S5. When the pressure in the intake pipe decreases, the self-adjustment process of the pressure self-adaptive regulating valve is opposite to that when the pressure increases.

[0056] To achieve the above object, the present invention adopts the following technical solutions:

[0057] A pressure self-adaptive regulating valve of a pressure stabilizing device includes a valve body, and further includes an opening degree regulating mechanism, an intake port regulating piston, and an opening degree limiting mechanism; the valve body is provided with a valve chamber, an intake port, and an air outlet; the middle opening degree regulating mechanism is arranged at the upper end of the valve chamber, and the opening degree limiting mechanism passes through the valve body and extends into the lower end of the valve chamber; the upper end of the intake port regulating piston is connected to the opening degree regulating mechanism, and the lower end is connected to the opening degree limiting mechanism.

[0058] The present invention has the following beneficial effects compared with the prior art:

[0059] 1. Adopting a three-stage pressure stabilizing structure such as pressure self-adaptive regulating valve feedback pressure regulation, pressure stabilizing tank energy absorption and pressure stabilization, and flow stabilizing tank partition flow stabilization to achieve stable air pressure and eliminate pressure fluctuations.

[0060] 2. The pressure adaptive regulating valve adopts a feedback method to automatically adjust the opening size and achieve real-time correction and regulation of pressure.

[0061] 3. The pressure stabilizing tank adopts a bladder structure. When the air flow pressure is high, it absorbs energy, and when the air flow pressure is low, it releases energy, effectively eliminating pressure pulsation and maintaining stable air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 is a schematic structural diagram of a pressure stabilizing device of the present invention;

[0063] In the figure: 1. Inlet pipe; 1.1. First gas check valve; 1.2. First pressure gauge; 2. Pressure adaptive regulating valve; 2.1. First air inlet; 2.2. Inlet regulating piston; 2.3. Pressure feedback chamber; 2.4. Air flow channel; 2.5. Large piston; 2.6. Spring; 2.7. Pressing plate; 2.8. Adjusting handle; 2.9. Locking nut; 2.10. Large piston chamber; 2.11. Large piston chamber air flow channel; 2.12. Annular chamber; 2.13. Annular chamber air flow channel; 2.14. First air outlet;; 3. Pressure stabilizing tank; 3.1. Bladder; 3.2. Air chamber; 3.3. Inflation port; 3.4. Air release and sewage discharge port; 4. Flow stabilizing tank; 4.1. Upper partition; 4.2. Lower partition; 4.3. Air release and sewage discharge port; 4.4. Side plate; 4.5. Top plate; 4.6. Bottom plate; 4.7. Safety valve; 5. Outlet pipe; 5.1. Pressure feedback pipe; 5.2. Second pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0064] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0065] Embodiment 1:

[0066] Please refer to Figure 1 , a pressure stabilizing device provided by the present invention includes an adaptive regulating valve 2, a pressure stabilizing tank 3, and a flow stabilizing tank 4 that are connected in sequence. The adaptive regulating valve 2 is connected to the inlet pipe 1, the flow stabilizing tank 4 is connected to the outlet pipe 5, and the outlet pipe 5 is connected to the pressure adaptive regulating valve 2 through a pressure feedback pipe 5.1.

[0067] The pressure adaptive regulating valve 2 includes a valve body, an inlet regulating piston 2.2, an opening degree regulating mechanism, and an opening degree limiting mechanism;

[0068] A valve cavity that is thick at the top and thin at the bottom is provided inside the valve body. A first air inlet 2.1 and a first air outlet 2.14 that are communicated with the valve cavity are respectively provided at the front end and the rear end of the valve body. The first air inlet 2.1 is provided below the first air outlet 2.14. The air inlet regulating piston 2.2 is arranged in the thin part of the valve cavity and can move up and down. The upper end of the air inlet regulating piston 2.2 is connected to an opening regulating mechanism arranged in the thick part of the valve cavity, and the lower end of the air inlet regulating piston 2.2 is connected to an opening limiting mechanism arranged on the valve body.

[0069] The air inlet regulating piston 2.2 is provided with a dumbbell-shaped through hole that is thin in the middle and thick at both ends. The middle thin hole of the dumbbell-shaped through hole is an air flow channel 2.4, and the first air outlet 2.14 is always completely communicated with the dumbbell-shaped through hole.

[0070] The opening regulating mechanism includes a large piston 2.5. The large piston 2.5 is connected to the upper end of the air inlet regulating piston 2.2. The large piston 2.5 and the upper end of the air inlet regulating piston 2.2 divide the thick part of the valve cavity into a large piston cavity 2.10 above the large piston 2.5 and an annular cavity 2.12 below. A large piston cavity air flow channel 2.11 that is communicated with the air flow channel 2.4 is provided in the large piston 2.5 and the air inlet regulating piston 2.2. The valve body is provided with an annular cavity air flow channel 2.13 that communicates the annular cavity 2.12 with the first air outlet 2.14.

[0071] The opening limiting mechanism includes a spring 2.6, a pressure plate 2.7, an adjusting rod, and a locking nut 2.9. A pressure feedback cavity 2.3 is formed between the lower end face of the air inlet regulating piston 2.2 and the valve body. The spring 2.6 and the pressure plate 2.7 are arranged in the feedback cavity. The upper end of the spring 2.6 is connected to the lower end of the air inlet regulating piston 2.2, and the upper end of the pressure plate 2.7 is connected to the lower end of the spring 2.6. The adjusting rod passes through the valve body and is movably connected to the pressure plate 2.7. The adjusting rod is threadedly connected to the valve body and can be rotated up and down. The locking nut 2.9 locks the adjusting rod and the valve body. The adjusting rod is provided with an adjusting handle 2.8 outside the valve body; the valve body is provided with a feedback joint in the pressure feedback cavity 2.3, and the pressure feedback pipe 5.1 is connected to the feedback joint of the pressure feedback cavity 2.3.

[0072] By rotating the adjusting handle 2.8, the pressure plate 2.7 is moved up and down, so as to realize the setting of the elastic force of the spring 2.6. After the adjustment is in place, the position of the adjusting rod is locked through the locking nut 2.9. The air inlet regulating piston 2.2 can move towards the large piston 2.5 until the first air inlet 2.1 is closed.

[0073] A first seal is provided between the air inlet regulating piston 2.2 and the inner wall of the valve cavity. The large piston 2.5 and the air inlet regulating piston 2.2 are connected by a thread or other connection means.

[0074] For ease of installation, the valve body on the large piston chamber 2.10 is a gland, which is connected to the valve body main body by threads or bolts, and a second seal is provided between the gland and the valve body main body.

[0075] The pressure stabilizing tank 3 has an oval structure, with an airbag 3.1 arranged inside. An inflation port 3.3 is provided at the upper end of the pressure stabilizing tank 3, a deflation and sewage discharge port 3.4 is provided at the lower end of the pressure stabilizing tank 3, and a second air inlet and a second air outlet are respectively provided at the front and rear ends of the tank wall of the pressure stabilizing tank 3.

[0076] The airbag 3.1 can be filled with inert gas at a certain pressure through the inflation port 3.3. The pressure of the filled inert gas is not less than 20% of the highest gas pressure of the casing gas and not higher than 90% of the lowest pressure of the casing gas. When gas flows through the pressure stabilizing tank 3, the airbag 3.1 is compressed to form an air chamber 3.2.

[0077] The flow stabilizing tank 4 is provided with upper partitions 4.1 and lower partitions 4.2 arranged in an alternating manner, and the number of the upper partitions 4.1 and the lower partitions 4.2 can be set in multiple groups according to the situation; the lower partitions 4.2 are connected to the bottom plate 4.6 of the flow stabilizing tank, and the air flow passes through the gap between the lower partitions 4.2 and the top plate 4.5; the upper partitions 4.1 are connected to the top plate 4.5 of the flow stabilizing tank, and the air flow passes through the gap between the upper partitions 4.1 and the bottom plate 4.6.

[0078] The flow stabilizing tank 4 is provided with a third air inlet on the tank wall adjacent to the lower partitions 4.2 and a third air outlet on the tank wall adjacent to the upper partitions 4.1. The air flow inlet and outlet of the flow stabilizing tank 4 adopt a structure design of lower inlet and upper outlet, and the third air inlet is below the third air outlet; air deflation and sewage discharge ports 4.3 are provided between the side plate 4.4 of the flow stabilizing tank 4 and the lower partitions 4.2 and between the lower partitions 4.2; a safety valve 4.7 is installed on the top plate 4.5 of the flow stabilizing tank 4.

[0079] The flow stabilizing tank 4 has a cylindrical, rectangular or square structure.

[0080] A first gas check valve 1.1 and a first pressure gauge 1.2 are provided on the inlet pipe 1, and the inlet pipe 1 is connected to the first air inlet 2.1 of the pressure adaptive regulating valve 2.

[0081] The pressure adaptive regulating valve 2 and the pressure stabilizing tank 3 are communicated through a first connecting pipe. The front end of the first connecting pipe is connected to the first air outlet 2.14 of the pressure adaptive regulating valve 2, and the rear end of the first connecting pipe is connected to the second air inlet of the pressure stabilizing tank 3; a second check valve is provided on the first connecting pipe.

[0082] The pressure stabilizing tank 3 and the flow stabilizing tank 4 are communicated through a second connecting pipe. The front end of the second connecting pipe is connected to the second air outlet of the pressure stabilizing tank 3, and the rear end of the second connecting pipe is connected to the third air inlet of the flow stabilizing tank 4. A third check valve is provided on the second connecting pipe.

[0083] The air outlet pipe 5 is connected to the third air outlet of the pressure stabilizing tank 4. The air outlet pipe 5 is provided with a fourth check valve and a second pressure gauge 5.2. The air outlet pipe 5 is connected to the feedback joint of the pressure self - adapting regulating valve 2 through a pressure feedback pipe 5.1, and then communicated with the pressure feedback chamber 2.3.

[0084] Embodiment 2:

[0085] Based on Embodiment 1, this embodiment provides a usage method of the device, including the following steps:

[0086] S1. Before starting the pressure stabilizing device, rotate the adjusting handle 2.8 of the pressure self - adapting regulating valve 2 to the lowermost end, and the spring 2.6 is in a free state. An inert gas with a certain pressure is pre - filled into the airbag in the pressure stabilizing tank 3 from the inflation port 3.3.

[0087] S2. Start the device. The casing gas enters the pressure self - adapting regulating valve 2 from the inlet pipe 1. The air flow enters the first air outlet 2.14 through the air flow channel 2.4. At the same time, the air flow enters the large piston chamber 2.10 through the air flow channel 2.11 of the large piston chamber and enters the annular chamber 2.12 through the air flow channel 2.13 of the annular chamber. Under the action of air pressure, the intake port adjusting piston 2.2 moves towards the spring 2.6, and the air intake port increases.

[0088] The air flow enters the pressure stabilizing tank 3. Under the action of gas pressure, the airbag 3.1 is compressed until the air pressure in the airbag 3.1 is balanced with the pressure in the air chamber 3.2.

[0089] Subsequently, the casing gas enters the flow stabilizing tank 4. The air flow passes through the air flow channels separated by the upper partition plate 4.1 and the lower partition plate 4.2, and finally enters the air outlet pipe 5.

[0090] The gas in the air outlet pipe 5 enters the pressure feedback chamber 2.3 through the pressure feedback pipe 5.1. Under the action of the air pressure in the air outlet pipe 5, the intake port adjusting piston 2.2 moves towards the direction of the large piston 2.5 until the air pressure acting force on the large piston 2.5 in the large piston chamber 2.10 is balanced with the air pressure acting forces in the annular chamber 2.12 and the pressure feedback chamber 2.3.

[0091] S3. Rotate the adjusting handle 2.8 to adjust the elastic force of the spring 2.6, and at the same time observe the reading of the pressure gauge 5.2 until the required pressure value is reached.

[0092] S4. When the pressure in the intake pipe 1 suddenly increases, the air pressure in the large piston chamber 2.10 and the annular chamber 2.10 increases, while the air pressure in the pressure feedback chamber 2.3 remains unchanged. The air pressure acting force on the large piston 2.5 from the large piston chamber 2.10 increases, and the intake port regulating piston 2.2 moves towards the spring 2.6. The spring 2.6 is compressed, and the air intake port increases until the increased acting force on the large piston 2.5 is equal to the increased elastic force of the spring 2.6.

[0093] Subsequently, the air flow enters the pressure stabilizing tank 3. As the air pressure increases, the airbag 3.1 contracts to absorb energy, reducing the impact of pressure pulsation on the pipeline air pressure. After the air pressures inside and outside the airbag 3.1 are equal, the pressure is transmitted downward.

[0094] After the air flow enters the flow stabilizing tank 4, the installed partition increases the length of the air flow channel. At the same time, the partition can slow down the impact of air pressure pulsation, making the pressure at the air outlet more stable.

[0095] When the increased pressure is transmitted from the pressure feedback pipe 5.1 to the pressure feedback chamber 2.3, the air pressure in the pressure feedback chamber 2.3 increases, and the force on the large piston 2.5 changes. The intake port regulating piston 2.2 moves towards the large piston 2.5, forming a new balance. The air intake port decreases, the pressure at the first air outlet 2.14 decreases, and the air pressures in the large piston chamber 2.10 and the annular chamber 2.12 decrease, further reducing the air intake port.

[0096] After the decreased air pressure is transmitted to the pressure feedback chamber 2.3, the intake port regulating piston 2.2 moves towards the spring 2.6 of the large piston 2.5, and the air intake port increases.

[0097] After the air pressure is continuously transmitted multiple times, the position of the intake port regulating piston 2.2 is adjusted in real time according to the pressure change, and finally the outlet pressure is stabilized at the set value.

[0098] S5. When the pressure in the intake pipe 1 decreases, the self-adjustment process of the pressure self-adaptive regulating valve 2 is opposite to that when the pressure increases.

[0099] Embodiment 3:

[0100] Please refer to Figure 1 , this embodiment provides a pressure self-adaptive regulating valve for a pressure stabilizing device, including a valve body, and further including an opening degree regulating mechanism, an intake port regulating piston, and an opening degree limiting mechanism; the valve body is provided with a valve cavity, a first intake port 2.1, and a second air outlet 2.14.

[0101] The opening degree regulating mechanism is arranged at the upper end of the valve cavity, and the opening degree limiting mechanism passes through the valve body and extends into the lower end of the valve cavity; the upper end of the intake port regulating piston is connected to the opening degree regulating mechanism, and the lower end is connected to the opening degree limiting mechanism.

[0102] In this application, any component itself that is not elaborated and the connection methods of various components in this application belong to the well-known technologies in the technical field. They can be directly applied and will not be elaborated further.

[0103] In the present invention, the term "a plurality of" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0104] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0105] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0106] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pressure stabilizing device, comprising a pressure stabilizing tank and a flow stabilizing tank, Characterized in that, It further includes an adaptive regulating valve; The adaptive regulating valve, the pressure stabilizing tank, and the flow stabilizing tank are connected in sequence; The pressure adaptive regulating valve includes a valve body, and an opening regulating mechanism, an air inlet regulating piston, and an opening limiting mechanism are sequentially arranged in the valve body from top to bottom.

2. The pressure stabilizing device according to claim 1, Characterized in that, A valve cavity that is thick at the top and thin at the bottom is arranged in the valve body, and a first air inlet and a first air outlet communicated with the valve cavity are respectively arranged at the front end and the rear end of the valve body, and the first air inlet is arranged below the first air outlet; The air inlet regulating piston is arranged in the thin part of the valve cavity and can move up and down. The upper end of the air inlet regulating piston is connected to the opening regulating mechanism arranged in the thick part of the valve cavity, and the lower end of the air inlet regulating piston is connected to the opening limiting mechanism passing through the valve body.

3. The pressure stabilizing device according to claim 2, Characterized in that, The air inlet regulating piston is provided with a dumbbell-shaped through hole that is thin in the middle and thick at both ends, and the thin hole in the middle of the dumbbell-shaped through hole is an air flow channel; The first air outlet is always completely communicated with the dumbbell-shaped through hole.

4. The pressure stabilizing device according to claim 3, Characterized in that, The opening regulating mechanism includes a large piston, and the large piston is connected to the upper end of the air inlet regulating piston; The large piston and the upper end of the air inlet regulating piston divide the thick part of the valve cavity into a large piston cavity above the large piston and an annular cavity below; A large piston cavity air flow channel communicated with the air flow channel is arranged in the large piston and the air inlet regulating piston; The valve body is provided with an annular cavity air flow channel that communicates the annular cavity with the first air outlet.

5. The pressure stabilizing device according to claim 4, Characterized in that, The opening limiting mechanism includes a spring, a pressing plate, an adjusting rod, and a locking nut; A pressure feedback cavity is formed between the lower end face of the air inlet regulating piston and the valve body, and the spring and the pressing plate are arranged in the feedback cavity; The upper end of the spring is connected to the lower end of the air inlet regulating piston, the upper end of the pressing plate is connected to the lower end of the spring, and the adjusting rod passes through the valve body and is movably connected to the pressing plate; The adjusting rod is threadedly connected to the valve body and can be rotated up and down. The locking nut locks the adjusting rod to the valve body, and an adjusting handle is arranged outside the valve body on the adjusting rod; The valve body is provided with a feedback joint in the pressure feedback cavity.

6. The pressure stabilizing device according to claim 5, Characterized in that, A first sealing member is arranged between the air inlet regulating piston and the inner wall of the valve cavity, and the large piston and the air inlet regulating piston are connected by threads or other connection methods; The valve body of the large piston cavity is a gland, and the gland is connected to the valve body main body by threads or bolts, and a second sealing member is arranged between the gland and the valve body main body.

7. The pressure stabilizing device according to claim 5, Characterized in that, The pressure stabilizing tank is of an oval structure, and an air bag is arranged inside. An inflation port is arranged at the upper end of the pressure stabilizing tank, a deflation and sewage discharge port is arranged at the lower end of the pressure stabilizing tank, and a second air inlet and a second air outlet are respectively arranged at the front end and the rear end of the tank wall of the pressure stabilizing tank.

8. A pressure stabilizing device according to claim 7, characterized in that, the airbag is filled with inert gas through the inflation port, and the pressure of the filled inert gas is not less than 20% of the highest gas pressure in the casing gas and not higher than 90% of the lowest pressure in the casing gas. When the gas flows through the pressure stabilizing tank, the airbag is compressed to form an air chamber.

9. A pressure stabilizing device according to claim 7, characterized in that, upper partition plates and lower partition plates are arranged in a staggered manner in the flow stabilizing tank, and at least one group of the upper partition plates and the lower partition plates is provided; the lower partition plate is connected to the bottom plate of the flow stabilizing tank, and the air flow passes through the gap between the lower partition plate and the top plate of the flow stabilizing tank; the upper partition plate is connected to the top plate of the flow stabilizing tank, and the air flow passes through the gap between the upper partition plate and the bottom plate of the flow stabilizing tank; a third air inlet is arranged on the tank wall of the flow stabilizing tank adjacent to the lower partition plate, and a third air outlet is arranged on the tank wall adjacent to the upper partition plate. The third air inlet is below the third air outlet; air release and sewage discharge ports are arranged between the side plate of the flow stabilizing tank and the lower partition plate and between the lower partition plates; a safety valve is installed on the top plate of the flow stabilizing tank; the outer shape of the flow stabilizing tank is a cylindrical, rectangular or square structure.

10. A pressure stabilizing device according to claim 9, characterized in that, it further includes an inlet pipe and an outlet pipe; a first gas check valve and a first pressure gauge are arranged on the inlet pipe, and the inlet pipe is connected to the first air inlet of the pressure self-adaptive regulating valve; the pressure self-adaptive regulating valve and the pressure stabilizing tank are communicated through a first connecting pipe. The front end of the first connecting pipe is connected to the first air outlet of the pressure self-adaptive regulating valve, and the rear end of the first connecting pipe is connected to the second air inlet of the pressure stabilizing tank; a second check valve is arranged on the first connecting pipe; the pressure stabilizing tank and the flow stabilizing tank are communicated through a second connecting pipe. The front end of the second connecting pipe is connected to the second air outlet of the pressure stabilizing tank, and the rear end of the second connecting pipe is connected to the third air inlet of the flow stabilizing tank; a third check valve is arranged on the second connecting pipe; the outlet pipe is connected to the third air outlet of the pressure stabilizing tank. The outlet pipe is provided with a fourth check valve and a second pressure gauge. The outlet pipe is connected to the feedback joint of the pressure self-adaptive regulating valve through a pressure feedback pipe, and then communicated with the pressure feedback chamber.

11. A method for using a pressure stabilizing device, characterized in that, it includes the following steps: S1. Before starting the pressure stabilizing device, rotate the adjusting handle of the pressure self-adaptive regulating valve to the lowermost end, and the spring is in a free state; the airbag in the pressure stabilizing tank is pre-filled with inert gas at a certain pressure through the inflation port; S2. Start the device. The casing gas enters the pressure self-adaptive regulating valve from the inlet pipe. The air flow enters the first air outlet through the air flow channel. At the same time, the air flow enters the large piston chamber through the air flow channel of the large piston chamber and enters the annular chamber through the air flow channel of the annular chamber. Under the action of the air pressure, the intake port adjusting piston moves towards the spring direction, and the air intake port increases; the air flow enters the pressure stabilizing tank. Under the action of the gas pressure, the airbag is compressed until the air pressure in the airbag is balanced with the pressure in the air chamber; subsequently, the casing gas enters the flow stabilizing tank. The air flow passes through the air flow channels separated by the upper partition plate and the lower partition plate, and finally enters the outlet pipe. The gas in the outlet pipe enters the pressure feedback chamber through the pressure feedback pipe. Under the action of the air pressure in the outlet pipe, the intake port adjustment piston moves towards the direction of the large piston until the air pressure force on the large piston in the large piston chamber is balanced with the air pressure forces in the annular chamber and the pressure feedback chamber; S3. Rotate the adjustment handle to adjust the elastic force of the spring, and at the same time observe the reading of the pressure gauge until the required adjusted pressure value is reached.

12. A method for using a pressure stabilizing device according to claim 11, characterized in that, it further includes the following steps: S4. When the pressure in the inlet pipe suddenly increases, the air pressures in the large piston chamber and the annular chamber increase, and the air pressure in the pressure feedback chamber remains unchanged. The air pressure force on the large piston increases, and the intake port adjustment piston moves towards the spring direction. The spring is compressed, and the air flow intake port increases until the increased force on the large piston is equal to the increased elastic force of the spring; Subsequently, the air flow enters the pressure stabilizing tank. As the air pressure increases, the airbag contracts to absorb energy, reducing the influence of pressure pulsation on the pipeline air pressure. When the air pressures inside and outside the airbag are equal, the pressure is transmitted downward; After the air flow enters the flow stabilizing tank, the provided partition increases the length of the air flow channel. At the same time, the partition can slow down the impact of air pressure pulsation, making the pressure at the outlet more stable; When the increased pressure is transmitted from the pressure feedback pipe to the pressure feedback chamber, the air pressure in the pressure feedback chamber increases, the force on the large piston changes, and the intake port adjustment piston moves towards the direction of the large piston to form a new balance. The air flow intake port decreases, the pressure at the first outlet decreases, and the air pressures in the large piston chamber and the annular chamber decrease, and the air flow intake port further decreases; After the decreased air pressure is transmitted to the pressure feedback chamber, the intake port adjustment piston moves towards the direction of the large piston spring, and the air flow intake port increases; After the air pressure is continuously transmitted multiple times, the position of the intake port adjustment piston is adjusted in real time according to the pressure change, and finally the outlet pressure is stabilized at the set value; S5. When the pressure in the inlet pipe decreases, the self-adjustment process of the pressure self-adaptive regulating valve is opposite to that when the pressure increases.

13. A pressure self-adaptive regulating valve of a pressure stabilizing device, including a valve body, characterized in that, it further includes an opening degree adjusting mechanism, an intake port adjustment piston, and an opening degree limiting mechanism; the valve body is provided with a valve chamber, an intake port, and an outlet; the opening degree adjusting mechanism is arranged at the upper end of the valve chamber, and the opening degree limiting mechanism passes through the valve body and extends into the lower end of the valve chamber; the upper end of the intake port adjustment piston is connected to the opening degree adjusting mechanism, and the lower end is connected to the opening degree limiting mechanism.

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