A flow controller powered by differential pressure kinetic energy

Abstract

The present invention belongs to the technical field of oilfield equipment, and in particular relates to a flow controller that self-supplies power using differential pressure kinetic energy. When the fluid to be measured flows through the throttling device, it will cause a certain resistance, thereby increasing power consumption and causing energy waste. In view of this problem existing in the existing products, the following solutions are proposed. It includes a valve body, a micro hydraulic generator is arranged at the bottom of the valve body, and an electric actuator is arranged at the top of the valve body. When the fluid passes through the valve body, the pressure difference on both sides of the impeller of the micro hydraulic generator will drive the impeller to rotate, and then drive the generator to generate electricity effectively. At the same time, the actuator drives the impeller to lift radially in the flow channel, which can change the flow rate in the flow channel, achieving the purpose of power generation and flow control.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield equipment, and particularly relates to a flow controller that self-supplies power using differential pressure kinetic energy. Background Art

[0002] In the middle and late stages of oilfield development, water injection is a prerequisite for the stable production, increased production, and normal production of oilfields. Water is injected into the formation through injection wells to displace underground crude oil to production wells, increasing the recovery rate of crude oil after primary oil recovery. To ensure a high recovery rate, the formation pressure must be maintained above the saturation pressure. However, according to the requirement of "stable oil production and water control" in oilfield development, the problem of water cut needs to be considered while increasing liquid production in the block. Therefore, reasonably controlling the water injection volume and achieving injection-production balance are basic means for high-yield and stable production of oilfields. A flow controller is a device for automatic flow regulation in the oilfield water injection process flow, usually consisting of a flow regulating valve, an electric actuator, and a flow control instrument. Summary of the Invention

[0003] Based on the fact that the existing flow controller relies on the energy consumption of the regulating valve to achieve flow regulation, resulting in a large amount of energy loss. The present invention proposes a flow controller that self-supplies power using differential pressure kinetic energy. A first rotating shaft is provided in the middle of the valve body, and impellers are annularly arranged on the circumferential outer wall of the first rotating shaft. At the same time, the first rotating shaft is installed on the shaft body of the generator. When the fluid passes through the valve body, the pressure difference on both sides of the impeller will drive the impeller to rotate, and then drive the rotation of the generator rotor to generate electricity, making full use of the differential pressure kinetic energy to generate electricity and achieving the purpose of energy conservation. At the same time, the actuator rotates to drive the second rotating shaft to move up and down, and then drive the impeller on the first rotating shaft to move up and down to achieve the purpose of controlling the flow rate.

[0004] A flow controller that self-supplies power using differential pressure kinetic energy proposed by the present invention includes a valve body. A first protrusion is provided on one side of the bottom of the valve body, and a first support frame is provided on the outer wall of the bottom of the first protrusion. A generator is provided at the bottom of the first support frame. Second fixing holes are opened on the inner walls of the four corners at the bottom of the first support frame, and second threaded holes are opened on the outer walls of the four corners at the top of the generator. The inner walls of the adjacent second fixing holes and second threaded holes are provided with the same first fixing screw, and a spring washer is provided between the first fixing screw and the first support frame. A first rotating shaft is fixedly installed on the shaft body of the generator, and impellers distributed in an annular array are fixedly installed on the circumferential top outer wall of the first rotating shaft. A liquid guiding cavity is horizontally provided in the middle of the valve body, and the impeller is located inside the liquid guiding cavity.

[0005] By adopting the above technical solution, when the fluid passes through the valve body, the pressure difference on both sides of the impeller will drive the impeller to rotate, and then drive the magnetic rod inside the generator to rotate, which can effectively generate electricity for the generator, effectively reducing the power consumption and achieving the effect of energy conservation.

[0006] Preferably, a second protrusion is provided on one side of the top of the valve body, and a bracket connection flange is provided on the top of the second protrusion. A second support frame is provided on the top of the bracket connection flange, and an electric actuator is provided on the top of the second support frame. Fourth fixing holes are provided on the outer walls of both sides of the top of the bracket connection flange. Fourth threaded holes are provided on the outer walls of both sides of the top of the second protrusion, and the inner walls of adjacent fourth fixing holes and fourth threaded holes are provided with the same second fixing screw.

[0007] By adopting the above technical solution, the generator is installed on the first support frame through the first fixing screw, and the electric actuator is installed on the second support frame through the second fixing screw, which can realize the convenient disassembly and assembly of the generator and the electric actuator, and thus effectively improve the convenience of using the device.

[0008] Preferably, a power cord is electrically connected to the power transmission end of the generator, and the power cord is electrically connected to the electric actuator. A valve stem is provided at the center of the bottom of the electric actuator, and a positioning snap ring is provided on the outer wall of the middle circumference of the valve stem.

[0009] Preferably, a limiting hole is provided on the outer wall of the top of one side of the bracket connection flange. A limiting block is provided on the outer wall of one side of the positioning snap ring, and the limiting block is located inside the limiting hole.

[0010] Preferably, a fixing block is fixedly sleeved on the outer wall of the middle circumference of the valve stem, and the fixing block is located directly above the positioning snap ring. Third fixing holes are provided on the outer walls of both sides of the top of the fixing block. Third threaded holes are provided on the outer walls of both sides of the top of the positioning snap ring, and the inner walls of adjacent third fixing holes and third threaded holes are provided with the same compression nut.

[0011] By adopting the above technical solution, the electric actuator can control the up and down movement of the positioning snap ring, and the limiting block can be limited through the limiting hole, thereby effectively fixing the valve stem and realizing the opening and closing of the valve body. By providing a power cord, the generator can assist in powering the electric actuator, achieving a self-power supply effect, which not only saves electric energy, but also does not require an external power supply, reducing the complexity of device installation and improving the convenience of using the device.

[0012] Preferably, a second rotating shaft is provided on the outer circumference of the bottom of the valve stem, and a socket hole is provided on the top of the second rotating shaft. The valve stem is fixed to the inner wall of the socket hole by bolts.

[0013] Preferably, the outer wall of the center of the top of the first rotating shaft is a T-shaped head, which is stuck in the T-shaped groove of the second rotating shaft.

[0014] Preferably, an installation groove is formed at the top of the second protrusion, and a valve cover is fixedly installed on the inner wall of the installation groove. Two first annular grooves are formed on the circumferential outer wall of the valve cover, and first sealing rings are sleeved on the inner walls of the two first annular grooves. Two second annular grooves are formed on the circumferential top inner wall of the valve cover, and second sealing rings are sleeved on the inner walls of the two second annular grooves.

[0015] By adopting the above scheme, two first sealing rings are arranged on the circumferential outer wall of the valve cover, and two second sealing rings are arranged on the circumferential inner wall of the valve cover, which can effectively seal the valve cover and the second rotating shaft, avoiding fluid leakage and affecting the use effect and safety of the device.

[0016] Preferably, the same first bearing sleeve is sleeved between the circumferential outer wall of the first rotating shaft and the first convex block, the same second bearing sleeve is sleeved between the circumferential outer wall of the second rotating shaft and the second protrusion, and a bearing cap is sleeved on the circumferential top outer wall of the first rotating shaft, and the bearing cap is pressed above the first bearing sleeve.

[0017] By adopting the above technical scheme, the first bearing sleeve is sealed and fixed by the bearing cap, improving the safety and stability of the use of the first bearing sleeve.

[0018] Preferably, two third annular grooves are formed on the circumferential middle outer wall of the first rotating shaft, and gland rings are sleeved on the inner walls of the two third annular grooves.

[0019] By adopting the above technical scheme, two gland rings are arranged on the circumferential outer wall of the first rotating shaft, and the gland rings can effectively seal the first rotating shaft, avoiding fluid leakage and affecting the use effect and safety of the device.

[0020] Compared with the prior art, the present invention provides a flow controller powered by differential pressure kinetic energy, having the following beneficial effects:

[0021] 1. For the flow controller powered by differential pressure kinetic energy, a first rotating shaft is arranged in the middle of the valve body, impellers are annularly arranged on the circumferential outer wall of the first rotating shaft, and the first rotating shaft is installed on the shaft body of the generator. When the fluid passes through the valve body, the pressure difference on both sides of the impeller will drive the impeller to rotate, and then drive the magnetic rod inside the generator to rotate, which can effectively generate electricity for the generator, effectively reducing the power consumption and achieving the energy-saving effect.

[0022] 2. The flow controller that utilizes differential pressure kinetic energy for self-power supply is provided with an electric actuator, a valve stem, a positioning snap ring, and a second rotating shaft. The electric actuator can control the up and down movement of the positioning snap ring, and the limiting block can be limited through the limiting hole, thereby effectively fixing the valve stem and realizing the opening and closing of the valve body. By setting a power cord, the generator can assist in powering the electric actuator, achieving the self-power supply effect. This not only saves electrical energy but also eliminates the need for an external power source, reducing the complexity of device installation and improving the convenience of device use.

[0023] 3. The flow controller that utilizes differential pressure kinetic energy for self-power supply is provided with a valve cover. Two first sealing rings are arranged on the circumferential outer wall of the valve cover, two second sealing rings are arranged on the circumferential inner wall of the valve cover, and two Gle seals are arranged on the circumferential outer wall of the first rotating shaft. The effective sealing of the device can be achieved by the first sealing ring, the second sealing ring, and the Gle seal, avoiding fluid leakage and affecting the use effect and safety of the device.

[0024] 4. The flow controller that utilizes differential pressure kinetic energy for self-power supply is provided with a first support frame and a second support frame. The generator is installed on the first support frame through the first fixing screw, and the electric actuator is installed on the second support frame through the second fixing screw. This enables the convenient disassembly and assembly of the generator and the electric actuator, thereby effectively improving the convenience of device use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a front cross-sectional structural schematic diagram of a flow controller that utilizes differential pressure kinetic energy for self-power supply proposed by the present invention;

[0026] Figure 2 is a structural schematic diagram of the first support frame of a flow controller that utilizes differential pressure kinetic energy for self-power supply proposed by the present invention;

[0027] Figure 3 is a partial front cross-sectional structural schematic diagram of the valve cover and the support flange of a flow controller that utilizes differential pressure kinetic energy for self-power supply proposed by the present invention.

[0028] In the figure: 1 generator, 2 power cord, 3 spring washer, 4 first fixing screw, 5 first support frame, 8 first rotating shaft, 9 Gle seal, 10 first bearing sleeve, 11 bearing cap, 12 impeller, 13 second rotating shaft, 14 second bearing sleeve, 15 valve cover, 16 first sealing ring, 17 second sealing ring, 18 valve stem, 19 second fixing screw, 20 electric actuator, 21 compression nut, 22 positioning snap ring, 23 support connection flange, 24 valve body. DETAILED DESCRIPTION OF THE INVENTION

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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.

[0030] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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 element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "connected", "set" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific situations.

[0032] Referring to Figures 1-3 , a flow controller that self-supplies power using differential pressure kinetic energy, includes a valve body 24. A first protrusion is provided on one side of the bottom of the valve body 24, and a first support frame 5 is provided on the outer wall of the bottom of the first protrusion. A generator 1 is provided at the bottom of the first support frame 5. Second fixing holes are respectively opened on the inner walls of the four corners at the bottom of the first support frame 5. Second threaded holes are respectively opened on the outer walls of the four corners at the top of the generator 1. And the inner walls of the adjacent second fixing holes and second threaded holes are provided with the same first fixing screw 4. A spring washer 3 is provided between the first fixing screw 4 and the first support frame 5. A first rotating shaft 8 is connected to the shaft body of the generator 1 through a bolt, and a ring of impellers 12 distributed in an annular array are connected to the outer wall of the top circumference of the first rotating shaft 8 through bolts. A liquid guide cavity is horizontally provided in the middle of the valve body 24, and the impellers 12 are located inside the liquid guide cavity.

[0033] In the present invention, a second protrusion is provided on one side of the top of the valve body 24, and a bracket connection flange 23 is provided on the top of the second protrusion. A second support frame is provided on the top of the bracket connection flange 23, and an electric actuator 20 is provided on the top of the second support frame. Fourth fixing holes are formed on the outer walls of both sides of the top of the bracket connection flange 23, and fourth threaded holes are formed on the outer walls of both sides of the top of the second protrusion. The inner walls of adjacent fourth fixing holes and fourth threaded holes are provided with the same second fixing screw 19. By providing the first support frame 5 and the second support frame, and installing the generator 1 on the first support frame 5 through the first fixing screw 4, and installing the electric actuator 20 on the second support frame through the second fixing screw 19, the convenient disassembly and assembly of the generator 1 and the electric actuator 20 can be realized, thereby effectively improving the convenience of use of the device. The purpose of the electric actuator 20 is to drive and adjust the up and down movement of the impeller according to the signal given by the flow control instrument, so as to change the flow rate. The more the impellers are in the flow channel, the smaller the flow rate; the fewer the impellers are in the flow channel, the larger the flow rate.

[0034] The power transmission end of the generator 1 is electrically connected to a power cord 2, and the power cord 2 is electrically connected to the electric actuator 20. A valve stem 18 is provided at the center of the bottom of the electric actuator 20, and a positioning snap ring 22 is provided on the outer wall of the middle part of the circumference of the valve stem 18. The opening and closing of the valve body can be realized by the electric actuator 20. By providing the power cord 2, the electric actuator 20 can be assisted in power supply by the generator 1, realizing the self-power supply effect, which not only saves electric energy, but also does not require an external power supply, reducing the complexity of device installation and improving the convenience of use of the device. The electric actuator 20 can drive the second rotating shaft 13 and the second bearing sleeve 14 to drive the impeller to move up and down.

[0035] A limiting hole is formed on the outer wall of the top of one side of the bracket connection flange 23. A limiting block is provided on the outer wall of one side of the positioning snap ring 22, and the limiting block is located inside the limiting hole. The up and down movement of the positioning snap ring 22 can be controlled by the electric actuator 20, and the limiting block can be limited through the limiting hole, thereby effectively fixing the valve stem 18 and realizing the opening and closing of the valve body 24;

[0036] A fixing block is fixedly sleeved on the outer wall of the middle part of the circumference of the valve stem 18, and the fixing block is located directly above the positioning snap ring 22. Third fixing holes are formed on the outer walls of both sides of the top of the fixing block, and third threaded holes are formed on the outer walls of both sides of the top of the positioning snap ring 22. The inner walls of adjacent third fixing holes and third threaded holes are provided with the same compression nut 21, improving the convenience of fixed installation of the positioning snap ring 22;

[0037] A second rotating shaft 13 is provided at the bottom of the circumference of the valve stem 18, and a socket hole is formed at the top of the second rotating shaft 13. The valve stem 18 is fixed to the inner wall of the socket hole by bolts;

[0038] The outer wall at the center of the top of the first rotating shaft 8 is a T-shaped head, which is stuck in the T-shaped groove of the second rotating shaft 13;

[0039] An installation groove is provided at the top of the second protrusion, and the inner wall of the installation groove is connected to a valve cover 15 by bolts. Two first annular grooves are provided on the circumferential outer wall of the valve cover 15, and two first sealing rings 16 are sleeved on the inner walls of the two first annular grooves. Two second annular grooves are provided on the circumferential inner wall of the valve cover 15, and two second sealing rings 17 are sleeved on the inner walls of the two second annular grooves. By providing two first sealing rings 16 on the circumferential outer wall of the valve cover 15 and two second sealing rings 17 on the circumferential inner wall of the valve cover 15, effective sealing treatment can be carried out on the valve cover 15 and the second rotating shaft 13, avoiding fluid leakage and affecting the use effect and safety of the device;

[0040] The same first bearing sleeve 10 is sleeved between the circumferential outer wall of the first rotating shaft 8 and the first convex block. The same second bearing sleeve 14 is sleeved between the circumferential outer wall of the second rotating shaft 13 and the second protrusion. A bearing cap 11 is sleeved on the circumferential outer wall at the top of the first rotating shaft 8, and the bearing cap 11 is pressed above the first bearing sleeve 10. The first bearing sleeve 10 is sealed and fixed by the bearing cap 11, improving the safety and stability of the use of the first bearing sleeve;

[0041] Two third annular grooves are provided on the circumferential outer wall in the middle of the first rotating shaft 8, and two gland rings 9 are sleeved on the inner walls of the two third annular grooves. By providing two gland rings 9 on the circumferential outer wall of the first rotating shaft 8, effective sealing of the first rotating shaft 8 can be achieved by the gland rings 9, avoiding fluid leakage and affecting the use effect and safety of the device.

[0042] The working principle of the present invention: When using this device during oilfield water injection, this device is installed between the water inlet pipes of the empty oil well. High-pressure water is injected into the empty oil well through the water inlet pipe to squeeze the oil in the ground into the surrounding oilfields. Then the water flow passes through the water guiding cavity in the valve body 24, and the impeller 12 rotates by using the different water pressures on both sides of it, thereby driving the magnetic rod inside the generator 1 to rotate, and effective power generation of the generator 1 can be achieved. Through the power cord 2, the generator 1 supplies auxiliary power to the electric actuator 20, realizing the self-power supply effect, not only saving electric energy, but also not requiring an external power supply, reducing the complexity of device installation and improving the convenience of device use.

[0043] The control mode of the present invention is automatically controlled by a controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The provision of power also belongs to the common knowledge in the art, and the present invention mainly aims to protect mechanical devices, so the control mode and circuit connection of the present invention will not be explained in detail.

[0044] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A flow controller that self - powers using differential pressure kinetic energy, comprising a valve body (24), characterized in that, On one side of the bottom of the valve body (24), there is a first protrusion, and on the outer wall of the bottom of the first protrusion, there is a first support frame (5). At the bottom of the first support frame (5), there is a generator (1). In the inner walls of the four corners at the bottom of the first support frame (5), second fixing holes are respectively opened. On the outer walls of the four corners at the top of the generator (1), second threaded holes are respectively opened. And in the inner walls of the adjacent second fixing holes and second threaded holes, there is the same first fixing screw (4). Between the first fixing screw (4) and the first support frame (5), there is a spring washer (3). On the shaft body of the generator (1), a first rotating shaft (8) is fixedly installed. And on the outer wall of the circumferential top of the first rotating shaft (8), impellers (12) distributed in an annular array are fixedly installed. In the middle of the valve body (24), a liquid guiding cavity is horizontally arranged, and the impellers (12) are located inside the liquid guiding cavity. On one side of the top of the valve body (24), there is a second protrusion, and on the top of the second protrusion, there is a bracket connection flange (23). On the top of the bracket connection flange (23), there is a second support frame, and on the top of the second support frame, there is an electric actuator (20). The power transmission end of the generator (1) is electrically connected to a power cord (2), and the power cord (2) is electrically connected to the electric actuator (20). At the center of the bottom of the electric actuator (20), there is a valve stem (18). On the circumferential bottom of the valve stem (18), there is a second rotating shaft (13). And on the top of the second rotating shaft (13), a socket hole is opened. The valve stem (18) is fixed to the inner wall of the socket hole by bolts. The outer wall of the central top of the first rotating shaft (8) is a T-shaped head, which is stuck in the T-shaped groove of the second rotating shaft (13). The rotation of the electric actuator drives the second rotating shaft to move up and down, and then drives the impellers on the first rotating shaft to move up and down, so as to control the flow rate.

2. The flow controller that self - powers using differential pressure kinetic energy according to claim 1, characterized in that, On the outer walls of both sides of the top of the bracket connection flange (23), fourth fixing holes are respectively opened. On the outer walls of both sides of the top of the second protrusion, fourth threaded holes are respectively opened. And in the inner walls of the adjacent fourth fixing holes and fourth threaded holes, there is the same second fixing screw (19).

3. The flow controller that self - powers using differential pressure kinetic energy according to claim 2, characterized in that, And on the circumferential middle outer wall of the valve stem (18), there is a positioning snap ring (22).

4. The flow controller that self - powers using differential pressure kinetic energy according to claim 3, characterized in that, On the outer wall of the top of one side of the bracket connection flange (23), a limiting hole is opened. On the outer wall of one side of the positioning snap ring (22), there is a limiting block, and the limiting block is located inside the limiting hole.

5. The flow controller that self - powers using differential pressure kinetic energy according to claim 4, characterized in that, On the circumferential middle outer wall of the valve stem (18), a fixing block is fixedly sleeved, and the fixing block is located directly above the positioning snap ring (22). On the outer walls of both sides of the top of the fixing block, third fixing holes are respectively opened. On the outer walls of both sides of the top of the positioning snap ring (22), third threaded holes are respectively opened. And in the inner walls of the adjacent third fixing holes and third threaded holes, there is the same compression nut (21).

6. The flow controller that self - powers using differential pressure kinetic energy according to claim 2, characterized in that, An installation groove is formed in the top of the second protrusion, and a valve cover (15) is fixedly installed on the inner wall of the installation groove. Two first annular grooves are formed in the circumferential outer wall of the valve cover (15), and first sealing rings (16) are sleeved on the inner walls of the two first annular grooves. Two second annular grooves are formed in the circumferential top inner wall of the valve cover (15), and second sealing rings (17) are sleeved on the inner walls of the two second annular grooves.

7. The flow controller that self - powers using differential pressure kinetic energy according to claim 1, characterized in that, A same first bearing sleeve (10) is sleeved between the circumferential outer wall of the first rotating shaft (8) and the first protrusion. A second bearing sleeve (14) is sleeved between the circumferential outer wall of the second rotating shaft (13) and the second protrusion. A bearing cap (11) is sleeved on the circumferential top outer wall of the first rotating shaft (8), and the bearing cap (11) is pressed above the first bearing sleeve (10).

8. The flow controller that self - powers using differential pressure kinetic energy according to claim 7, characterized in that, Two third annular grooves are formed in the circumferential middle outer wall of the first rotating shaft (8), and gland rings (9) are sleeved on the inner walls of the two third annular grooves.

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