Waterproof multistage centrifugal energy-saving pump for oil exploitation

Abstract

The invention relates to the technical field of energy-saving pumps, in particular to a waterproof multistage centrifugal energy-saving pump for oil exploitation, which comprises an upper pump shell and a lower pump shell, a recovery bin is fixedly mounted between the upper pump shell and the lower pump shell, a water inlet is fixedly mounted at the upper end of the upper pump shell, and a water outlet is fixedly mounted on the outer wall of the upper end of the lower pump shell. Guide vanes are fixedly installed in the upper pump shell and the lower pump shell, and shaft rods are rotationally installed in the middles of the interiors of the upper pump shell and the lower pump shell. The sealing box structure embedded in the upper pump shell is arranged, the embedded structure of the sealing box is in direct contact with flowing water in the pump shell, flowing water is used for heat dissipation, the temperature of the environment where a motor is located in the sealing box is effectively controlled, and heat dissipation of the motor is assisted; the waterproof cover is arranged at the other open end of the sealing box, water can be effectively prevented from entering the sealing box, the servo motor and the like are prevented from being affected with damp in use, and then the pump body can be used in the outdoor environment of oil exploitation.

Description

Technical Field

[0001] The present invention relates to the technical field of energy-saving pumps, and particularly to a waterproof multi-stage centrifugal energy-saving pump for oil extraction. Background Art

[0002] During the oil extraction process, high-pressure water injection is one of the core processes for maintaining formation pressure and improving crude oil recovery. As a key device in the water injection system, multi-stage centrifugal pumps need to operate under complex working conditions of high temperature, high humidity, sand-containing and corrosive media for a long time.

[0003] However, traditional multi-stage centrifugal pumps have significant defects in structural design and environmental adaptability: If the motor adopts a closed protection structure, although it can isolate external water vapor, the internal heat accumulation causes the temperature to rise too fast. After the motor winding temperature operates for a long time, it can cause the internal insulation of the motor to age or even burn out; If an open heat dissipation design is adopted, the oil-containing sewage leaking from the pump body is likely to invade the motor cavity, causing a short-circuit fault. If the servo motor is set in a sealed environment, the existing sealing structures mostly rely on static pressing of rubber gaskets. Under the vibration generated during the operation of the pump body, micro-gaps are likely to occur at the sealing interface, thereby affecting the sealing performance of the environment where the motor is located and it is difficult to ensure the waterproof effect of the pump body. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a waterproof multi-stage centrifugal energy-saving pump for oil extraction.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A waterproof multi-stage centrifugal energy-saving pump for oil extraction, comprising an upper pump casing and a lower pump casing. A recovery chamber is fixedly installed between the upper pump casing and the lower pump casing. An inlet is fixedly installed at the upper end of the upper pump casing, and an outlet is fixedly installed on the outer wall of the upper end of the lower pump casing. Guide vanes are fixedly installed inside both the upper pump casing and the lower pump casing. A shaft rod is rotatably installed at the middle position inside the upper pump casing and the lower pump casing. An inducer is fixedly installed at the end of the shaft rod. A kinetic energy recovery module is arranged on the outer wall of the shaft rod where it accesses the inside of the recovery chamber. A plurality of positive impellers are fixedly installed on the outer wall of the shaft rod where it accesses the inside of the upper pump casing, and a plurality of reverse impellers are fixedly installed on the outer wall of the shaft rod where it accesses the inside of the lower pump casing. A sealing box embedded inside the upper pump casing is arranged on the outer wall at the end of the upper pump casing. A driving assembly is arranged inside the sealing box, and a sealing assembly is movably installed at the end of the sealing box outside the upper pump casing; The driving assembly includes a second gear rotatably installed on the inner wall of the sealing box, and also includes a servo motor for driving the second gear to rotate. A first gear meshed with the second gear is also rotatably installed on the inner wall of the sealing box. A connecting rod is fixedly installed at the central position of the first gear. The end of the connecting rod passes through the sealing box, and the end of the connecting rod extends into the inside of the upper pump casing. The connecting rod is rotatably connected at the connection with the sealing box. A worm gear is fixedly installed at the end of the connecting rod. A spiral tooth meshed with the worm gear is fixedly installed at the corresponding position on the outer wall of the shaft rod. The driving assembly also includes a quick-release structure for assisting the installation of the servo motor inside the sealing box; The sealing assembly includes a waterproof cover movably installed at the end of the sealing box. Clamping rods are movably installed at both ends inside the waterproof cover. Stopping blocks for cooperating with the clamping rods are fixedly installed on the outer walls of both sides of the sealing box close to the waterproof cover.

[0007] Preferably, the quick-release structure includes a cross bar fixedly installed inside the sealing box. A docking rod is rotatably installed at the central position of the cross bar. One end of the docking rod is fixedly connected to the central position of the second gear. A cross slot is opened at the other end of the docking rod. A plug rod matched with the cross slot is fixedly installed at the output end of the servo motor, and the plug rod is inserted and installed inside the cross slot. The quick-release structure also includes a lifting seat fixedly installed on the inner wall of the lower end of the sealing box. A supporting platform is fixedly installed at the upper end of the lifting seat. An arc-shaped placement groove is opened on the upper end surface of the supporting platform. The servo motor is placed inside the arc-shaped placement groove. A pressing block is slidably installed on the upper part of the cross bar, and the pressing block is arranged above the servo motor.

[0008] Preferably, a second bevel gear is rotatably installed on the inner wall of the top of the sealing box. A threaded sleeve is fixedly connected to the end of the second bevel gear. The end of the threaded sleeve is fixedly connected to the pressing block. A rectangular plate is also fixedly installed on the inner wall of the top of the sealing box, and the rectangular plate is arranged outside the second bevel gear. A threaded rod is threadedly connected to the rectangular plate. A first bevel gear meshed with the second bevel gear is fixedly installed at one end of the threaded rod close to the second bevel gear.

[0009] Preferably, installation grooves are formed at positions corresponding to both ends of the clamping rod on the waterproof cover. Both ends of the clamping rod are slidably installed in the installation grooves, and a control structure for controlling the movement of the clamping rod is arranged inside the installation grooves.

[0010] Preferably, the control structure includes a movable block fixedly installed at the end of the clamping rod. A return spring is fixedly connected between the movable block and the inner wall of the end of the installation groove. A second rack plate is slidably installed on the inner wall of the bottom surface of the installation groove. The end of the second rack plate is fixedly connected to the movable block. A steering gear meshing with the second rack plate is rotatably connected above the second rack plate inside the installation groove. A first rack plate meshing with the steering gear is also slidably installed on the inner wall of the top of the installation groove. A sliding rod is fixedly connected to the outer wall of one end of the first rack plate close to the movable block. The other end of the sliding rod away from the first rack plate extends to the outside of the waterproof cover, and the sliding rod penetrates through the outer wall of the end of the waterproof cover and is slidably connected to the connection part of the waterproof cover.

[0011] Preferably, a guide rod is slidably connected to the outer wall of one side of the movable block corresponding to the return spring. The guide rod is arranged inside the return spring, and the other end of the guide rod away from the movable block is fixedly connected to the inner wall of the end of the installation groove.

[0012] Preferably, the ends of two sliding rods arranged on the same side of the waterproof cover are fixedly connected together with a pressing plate. A fixed block is fixedly installed on the outer wall of the waterproof cover. A limit pin is slidably installed on the fixed block, and the cross section of the limit pin is L-shaped.

[0013] Preferably, sealing strips are fixedly installed on the peripheral side of the inner wall of the waterproof cover, and the cross-sectional shapes of the sealing strips arranged at both ends of the waterproof cover are matched with the stop blocks.

[0014] Preferably, a stabilizing rod is fixedly installed on the outer wall of the sealing box corresponding to the connecting rod. The connecting rod is rotatably connected to the upper end of the stabilizing rod.

[0015] Preferably, a resisting rod is fixedly installed at a position on the inner wall of the waterproof cover corresponding to the servo motor, and a docking groove matched with the resisting rod is formed on the outer wall of the end of the servo motor.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] By arranging a sealing box structure embedded in the upper pump shell, the embedded structure of the sealing box is in direct contact with the flowing water inside the pump shell, and heat dissipation is carried out by using the flowing water, effectively controlling the temperature of the environment where the motor inside the sealing box is located, assisting the motor in heat dissipation, and a sealing bearing is arranged at the connection part of the sealing box and the connecting rod, and a waterproof cover is arranged at the other open end, which can effectively prevent water from entering the inside of the sealing box, avoid moisture-related failures of the servo motor and the like during use, and thus meet the use of the pump body in the outdoor environment of oil extraction.

[0018] In the present invention, a humidity-sensitive resistor strip is arranged inside the sealed box. After water leaks through the outer wall of the sealed box, the water flows along the inner wall of the sealed box to the bottom surface of the sealed box. After the humidity-sensitive resistor strip absorbs water, its resistance drops significantly, thereby triggering a buzzer alarm. The alarm emits a warning to remind relevant staff to repair the inside of the sealed box.

[0019] In the present invention, a wedge-shaped stopper and a clamping rod that is reset by a return spring are provided. The waterproof cover forms a waterproof barrier through the mechanical locking of the wedge-shaped stopper and the clamping rod, and cooperates with a sealing strip. The double-limiting design of the rod slot and the servo motor effectively inhibits the sealing failure caused by the vibration of the servo motor. Moreover, a quick-disassembly design of the cross-shaped plug rod and the bevel gear linkage is adopted inside the sealed box. The servo motor is inserted into the cross slot of the plug rod and the docking rod, and cooperates with the vertical locking structure of the threaded sleeve to drive the pressing block, so that the replacement of the servo motor can be quickly completed without disassembling the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the upper pump housing in an embodiment of the present invention;

[0023] Figure 3 It is a schematic diagram of the meshing of the worm gear and the helical tooth structure in an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the sealed box in an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the disassembly of the waterproof cover and the sealed box in an embodiment of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the installation groove in an embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the abutting rod in an embodiment of the present invention;

[0028] Figure 8 It is a schematic diagram of the installation of the servo motor structure in an embodiment of the present invention;

[0029] Figure 9 It is a schematic diagram of the internal structure of the sealed box in an embodiment of the present invention;

[0030] Figure 10 Schematic cross-sectional view of the sealed box structure in the embodiment of the present invention;

[0031] Figure 11 Schematic cross-sectional view of the sealing strip structure in the embodiment of the present invention;

[0032] Figure 12 In the embodiment of the present invention Figure 6 Partial enlarged view of part A in the figure.

[0033] In the figure: 1, upper pump housing; 2, water inlet; 3, water outlet; 4, guide vane; 5, lower pump housing; 6, recovery bin; 7, waterproof cover; 8, sealed box; 9, shaft rod; 10, inducer; 11, spiral tooth; 12, positive impeller; 13, reverse impeller; 14, kinetic energy recovery module; 15, worm gear; 16, pressing plate; 17, fixing block; 18, limit pin; 19, slide rod; 20, first rack plate; 21, steering gear; 22, second rack plate; 23, movable block; 24, guide rod; 25, return spring; 26, clamping rod; 27, installation groove; 28, stop block; 29, connecting rod; 30, stabilizing rod; 31, first gear; 32, elevation seat; 33, supporting platform; 34, servo motor; 35, rectangular plate; 36, threaded rod; 37, threaded sleeve; 38, pressing block; 39, second gear; 40, first bevel gear; 41, second bevel gear; 42, docking rod; 43, cross slot; 44, insertion rod; 45, sealing strip; 46, cross bar; 47, abutting rod. Detailed implementation manners

[0034] 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.

[0035] Refer to Figures 1-12, a waterproof multi-stage centrifugal energy-saving pump for oil extraction, comprising an upper pump casing 1 and a lower pump casing 5. A recovery chamber 6 is fixedly installed between the upper pump casing 1 and the lower pump casing 5. An inlet 2 is fixedly installed at the upper end of the upper pump casing 1. An outlet 3 is fixedly installed on the outer wall of the upper end of the lower pump casing 5. Guide vanes 4 are fixedly installed inside both the upper pump casing 1 and the lower pump casing 5. A shaft rod 9 is rotatably installed at the middle position inside the upper pump casing 1 and the lower pump casing 5. An inducer 10 is fixedly installed at the end of the shaft rod 9 inside the inlet 2. A kinetic energy recovery module 14 is arranged on the outer wall of the shaft rod 9 inside the recovery chamber 6. The kinetic energy recovery module 14 is a prior art and will not be elaborated here. A plurality of positive impellers 12 that cooperate with the guide vanes 4 are fixedly installed on the outer wall of the shaft rod 9 inside the upper pump casing 1. A plurality of reverse impellers 13 that cooperate with the guide vanes 4 are fixedly installed on the outer wall of the shaft rod 9 inside the lower pump casing 5. The positive impellers 12 and the reverse impellers 13 are arranged in the opposite direction. A sealing box 8 that is embedded inside the upper pump casing 1 is arranged on the outer wall of one end of the upper pump casing 1 close to the lower pump casing 5. A driving assembly is arranged inside the sealing box 8. A sealing assembly is movably installed at the end of the sealing box 8 outside the upper pump casing 1;

[0036] The driving assembly includes a second gear 39 rotatably installed on the inner wall of the sealing box 8, and also includes a servo motor 34 that drives the second gear 39 to rotate. A first gear 31 that meshes with the second gear 39 is also rotatably installed on the inner wall of the sealing box 8. A connecting rod 29 is fixedly installed at the central position of the first gear 31. The end of the connecting rod 29 passes through the sealing box 8, and the end of the connecting rod 29 extends into the upper pump casing 1. The connecting rod 29 is rotatably connected at the connection with the sealing box 8. The connecting rod 29 is rotatably connected at the connection with the sealing box 8 through a pedestal bearing. The pedestal bearing is provided with a sealing lip and forms a closed cavity with the bearing seat. A worm gear 15 is fixedly installed at the end of the connecting rod 29. A helical tooth 11 that meshes with the worm gear 15 is fixedly installed at the corresponding position on the outer wall of the shaft rod 9. The driving assembly also includes a quick-release structure for assisting the installation of the servo motor 34 inside the sealing box 8;

[0037] The sealing assembly includes a waterproof cover 7 movably installed at the end of the sealing box 8. Clamping rods 26 are movably installed at both ends inside the waterproof cover 7. Block blocks 28 that cooperate with the clamping rods 26 are fixedly installed on both outer walls of the end of the sealing box 8 close to the waterproof cover 7. The cross-section of the block block 28 is wedge-shaped. The clamping rods 26 slide towards both ends of the waterproof cover 7 under the guiding action of the wedge-shaped block blocks 28. After the clamping rods 26 are not extruded by the block blocks 28, they can be reset and clamped with the ends of the block blocks 28. Installation grooves 27 are opened at the corresponding positions of both ends of the waterproof cover 7 for the clamping rods 26. Both ends of the clamping rods 26 are slidably installed in the installation grooves 27, and a control structure for controlling the movement of the clamping rods 26 is arranged inside the installation grooves 27;

[0038] During oil extraction, high-pressure water is continuously injected into the oil layer through this device to maintain formation pressure. The flowing water enters the interior of the pump body through the water inlet 2. Guide vanes 4 are provided inside both the upper pump housing 1 and the lower pump housing 5 that make up the pump body. A positive impeller 12 and a reverse impeller 13 that cooperate with the guide vane 4 are respectively fixedly installed on the outer walls of the upper pump housing 1 and the lower pump housing 5 where the shaft rod 9 is located. After the flowing water passes through the pump body, it is output outward at high pressure from the water outlet 3. And before the flowing water is output outward, it passes through the interior of the recovery chamber 6. The kinetic energy recovery module 14 provided inside the recovery chamber 6 can recover the kinetic energy of the flowing water flowing through the pump body. Sealing boxes 8 are provided on both sides at the lower end of the upper pump housing 1. The sealing boxes 8 are embedded. The flowing water inside the pump body directly contacts the outer wall of the sealing box 8. The servo motor 34 provided inside the sealing box 8 drives the second gear 39 to rotate, and then drives the first gear 31 to rotate through the meshing between the second gear 39 and the first gear 31. A connecting rod 29 provided at the middle position of the first gear 31 and the connection part on the sealing box 8 are provided with a pedestal bearing. The first gear 31 drives the connecting rod 29 to rotate synchronously. Among them, the shaft rod 9 and the spiral teeth 11 provided on its outer wall are integrally formed. The shaft rod 9 and the spiral teeth 11 together form a worm that matches the worm gear 15. The worm gear 15 provided at the end of the connecting rod 29 and the spiral teeth 11 provided on the outer wall of the shaft rod 9 drive the shaft rod 9 to rotate synchronously under the action of meshing transmission. When replacing the servo motor 34 or performing maintenance on the interior of the sealing box 8, through the control structure, the clamping rods 26 provided at both ends of the waterproof cover 7 move towards both ends of the waterproof cover 7 and do not engage with the stoppers 28. When the clamping rods 26 provided at both ends of the waterproof cover 7 do not engage with the stoppers 28, the user can quickly remove the waterproof cover 7 from the end of the sealing box 8, thereby facilitating the maintenance of the interior of the sealing box 8 and the replacement of components. After the operation on the interior of the sealing box 8 is completed, the user aligns the waterproof cover 7 with the end of the sealing box 8 and squeezes it. The clamping rods 26 provided at both ends of the waterproof cover 7 slide towards both ends under the action of the wedge-shaped stoppers 28. When the clamping rods 26 slide along the outer wall of the stoppers 28 to the end of the stoppers 28, the control structure causes the clamping rods 26 to reset, and thus the clamping rods 26 move to the end of the stoppers 28 and engage with the stoppers 28.

[0039] As a technical optimization solution of the present invention, the quick-release structure includes a cross bar 46 fixedly installed inside a sealed box 8. A docking rod 42 is rotatably installed at the central position of the cross bar 46. One end of the docking rod 42 is fixedly connected to the central position of a second gear 39. A cross slot 43 is formed at the other end of the docking rod 42. A plug rod 44 that is matched with the cross slot 43 is fixedly installed at the output end of a servo motor 34, and the plug rod 44 is inserted and installed inside the cross slot 43. The quick-release structure further includes a lifting seat 32 fixedly installed on the inner wall of the lower end of the sealed box 8. A supporting platform 33 is fixedly installed at the upper end of the lifting seat 32. An arc-shaped placement groove is formed on the upper end surface of the supporting platform 33. The servo motor 34 is placed inside the arc-shaped placement groove. A pressing block 38 is slidably installed on the upper part of the cross bar 46, and the pressing block 38 is arranged above the servo motor 34. The cross bar 46 and the pressing block 38 are slidably matched through a dovetail-shaped convex block provided on the pressing block 38 and a strip-shaped dovetail groove on the cross bar 46. Inserting the plug rod 44 fixedly installed at the end of the servo motor 34 into the cross slot 43 formed on the docking rod 42 can achieve the quick connection between the output end of the servo motor 34 and the docking rod 42. Placing the servo motor 34 inside the arc-shaped groove formed on the upper end surface of the supporting platform 33 and then pushing the servo motor 34 inward so that the plug rod 44 provided at the end of the servo motor 34 is inserted into the cross slot 43 can complete the quick connection between the output shaft of the servo motor 34 and the docking rod 42.

[0040] As a technical optimization solution of the present invention, a second bevel gear 41 is rotatably installed on the inner wall of the top of the sealed box 8. A threaded sleeve 37 is fixedly connected to the end of the second bevel gear 41, and the threaded sleeve 37 is fixedly connected to the pressing block 38. A rectangular plate 35 is also fixedly installed on the inner wall of the top of the sealed box 8. A threaded rod 36 is threadedly connected to the rectangular plate 35. A first bevel gear 40 that is meshed with the second bevel gear 41 is fixedly installed at one end of the threaded rod 36 close to the second bevel gear 41. When the servo motor 34 fails and needs to be replaced, the user can disassemble the waterproof cover 7 from the end of the sealed box 8 and then rotate the threaded rod 36. The first bevel gear 40 fixedly connected to the end of the threaded rod 36 is meshed with the second bevel gear 41. Then, when the threaded rod 36 rotates, it can drive the second bevel gear 41 to drive the threaded sleeve 37 to rotate synchronously. The pressing block 38 fixedly connected to the end of the threaded sleeve 37 is slidably connected to the cross bar 46. Then, when the threaded sleeve 37 rotates, it can pull the pressing block 38 to move upward. After the pressing block 38 moves upward, it does not squeeze the outer wall of the servo motor 34. After the pressing block 38 does not squeeze and fix the servo motor 34, the user can pull the servo motor 34 outward so that the plug rod 44 fixedly installed at its end is removed from the cross slot 43, thereby disassembling and replacing the servo motor 34. After the servo motor 34 is replaced, then rotate the threaded rod 36 so that the pressing block 38 slides downward along the surface of the sealed box 8 to squeeze and fix the outer wall of the servo motor 34.

[0041] As a technical optimization solution of the present invention, the control structure includes a movable block 23 fixedly installed at the end of the clamping rod 26. A return spring 25 is fixedly connected between the movable block 23 and the inner wall of the end of the installation groove 27. A second rack plate 22 is slidably installed on the bottom inner wall of the installation groove 27. The second rack plate 22 is slidably connected to the bottom inner wall of the installation groove 27 through a linear guide rail. The slider in the linear guide rail is fixed to the second rack plate 22, and the guide rail is fixed to the bottom inner wall of the installation groove 27. The end of the second rack plate 22 is fixedly connected to the movable block 23. A steering gear 21 meshing with the second rack plate 22 is rotatably connected above the second rack plate 22 inside the installation groove 27. A first rack plate 20 meshing with the steering gear 21 is also slidably installed on the top inner wall of the installation groove 27. A sliding rod 19 is fixedly connected to the outer wall of one end of the first rack plate 20 close to the movable block 23. The other end of the sliding rod 19 away from the first rack plate 20 extends to the outside of the waterproof cover 7, and the sliding rod 19 passes through the outer wall of the end of the waterproof cover 7 and is slidably connected to the connection part of the waterproof cover 7. The sliding connection mode between the sliding rod 19 and the waterproof cover 7 is similar to the connection mode between the piston rod and the cylinder block; the bottom surface of the sliding rod 19 is attached to the upper surface of the movable block 23. When the end of the sliding rod 19 is squeezed, the sliding rod 19 pushes the first rack plate 20 to slide. Under the action of the steering gear 21 arranged between the first rack plate 20 and the second rack plate 22, the sliding directions of the second rack plate 22 and the first rack plate 20 are opposite. The second rack plate 22 pushes the movable block 23 to move towards the end of the waterproof cover 7. The movable blocks 23 arranged at both ends of the clamping rod 26 both slide towards the end of the waterproof cover 7, thereby driving the clamping rod 26 to move outwards from the end of the stop block 28 and not engaging with the stop block 28. When the clamping rods 26 arranged at both ends of the waterproof cover 7 do not engage with the stop block 28, the user can quickly remove the waterproof cover 7 from the end of the sealed box 8, thereby facilitating the maintenance of the inside of the sealed box 8 and the replacement of parts.

[0042] As a technical optimization solution of the present invention, a guide rod 24 is slidably connected to the outer wall of the side of the movable block 23 corresponding to the return spring 25. The guide rod 24 is arranged inside the return spring 25, and the other end of the guide rod 24 away from the movable block 23 is fixedly connected to the inner wall of the end of the installation groove 27; when the movable block 23 is squeezed, it slides along the guide rod 24, which can make the end of the return spring 25 evenly stressed.

[0043] As a technical optimization solution of the present invention, the ends of two sliding rods 19 arranged on the same side of the waterproof cover 7 are fixedly connected together with a pressing plate 16, and a limiting pin 18 is arranged on the outer wall of the waterproof cover 7; by pressing the pressing plate 16, the two sliding rods 19 can be simultaneously pushed to move towards the inside of the installation groove 27, and by pressing the pressing plates 16 arranged at both ends of the waterproof cover 7, the clamping rods 26 arranged at both ends of the waterproof cover 7 can be simultaneously moved towards both ends of the waterproof cover 7. The arrangement of the limiting pin 18 can prevent the connection between the waterproof cover 7 and the sealing box 8 from loosening when the pressing plate 16 is accidentally touched by an external force.

[0044] As a technical optimization solution of the present invention, sealing strips 45 are fixedly installed on the peripheral side of the inner wall of the waterproof cover 7, and the cross-sectional shapes of the sealing strips 45 arranged at both ends of the waterproof cover 7 are matched with the shape of the stoppers 28; the sealing strips 45 are deformed by extrusion when the waterproof cover 7 is completely installed at the end of the sealing box 8, which can enhance the sealing performance of the connection between the waterproof cover 7 and the sealing box 8.

[0045] As a technical optimization solution of the present invention, a stabilizing rod 30 is fixedly installed on the outer wall of the sealing box 8 corresponding to the connecting rod 29, and the upper end of the connecting rod 29 is rotatably connected to the stabilizing rod 30; a bearing is arranged between the upper end of the connecting rod 29 and the stabilizing rod 30, wherein the outer ring of the bearing is fixedly connected to the upper end of the stabilizing rod 30, the connecting rod is fixedly connected to the inner ring of the bearing, and the upper end of the stabilizing rod 30 is rotatably connected to the connecting rod 29. While ensuring the normal rotation of the connecting rod 29, the amplitude of the shaking of the connecting rod 29 during rotation is reduced, the meshing accuracy between the worm wheel 15 and the spiral teeth 11 is ensured, and at the same time, the influence of the shaking of the connecting rod 29 on the sealing performance of its connection with the sealing box 8 is avoided.

[0046] As a technical optimization solution of the present invention, a fixing block 17 is fixedly installed on the outer wall of the waterproof cover 7, the limiting pin 18 is slidably installed on the fixing block 17, and the cross-section of the limiting pin 18 is L-shaped; when the end of the limiting pin 18 is arranged between the pressing plate 16 and the outer wall of the waterproof cover 7, the pressing plate 16 can be prevented from moving under the action of an external force by the blocking of the limiting pin 18, thereby causing the connection between the waterproof cover 7 and the sealing box 8 to loosen. The L-shaped limiting pin 18 is more convenient for the user to move the limiting pin 18.

[0047] As a technical optimization solution of the present invention, a resisting rod 47 is fixedly installed at the position corresponding to the servo motor 34 on the inner wall of the waterproof cover 7, and a docking groove matching the resisting rod 47 is opened on the outer wall of the end of the servo motor 34; after the waterproof cover 7 is installed, the resisting rod 47 fixedly installed on the inner wall of the waterproof cover 7 presses the outer wall of the end of the servo motor 34 to further limit the servo motor 34, avoiding the servo motor 34 from shaking during operation, and the end of the resisting rod 47 is inserted into the docking groove opened at the end of the servo motor 34, which can further enhance the limiting effect on the servo motor 34.

[0048] When the present invention is in normal use, during oil extraction, high-pressure water is continuously injected into the oil layer through this device to maintain formation pressure. The flowing water enters the interior of the pump body through the water inlet 2. Guide vanes 4 are provided inside both the upper pump housing 1 and the lower pump housing 5 that make up the pump body. A positive impeller 12 and a reverse impeller 13 that cooperate with the guide vane 4 are fixedly installed on the outer walls of the upper pump housing 1 and the lower pump housing 5 respectively where the shaft rod 9 is located. In the prior art, through precise calculation of the angles of the positive impeller 12 and the reverse impeller 13, when the positive impeller 12 and the reverse impeller 13 rotate synchronously, they can be used to balance the axial force received by the shaft rod 9. Then the flowing water is output outward at high pressure from the water outlet 3 after passing through the pump body. And before the flowing water is output outward, it passes through the interior of the recovery bin 6. The kinetic energy recovery module 14 provided inside the recovery bin 6 can recover the kinetic energy of the flowing water flowing through the pump body. The kinetic energy recovery module 14 specifically includes a permanent magnet provided on the outer wall of the shaft rod 9 and a coil winding provided on the recovery bin 6 around the permanent magnet. When the shaft rod 9 rotates, relative movement occurs between the permanent magnet and the coil, cutting the magnetic induction line to generate electricity. The electric energy is led out through a wire and used for auxiliary power supply or energy storage. And when the flowing water flows through the interior of the recovery bin 6, it cools the power generation module synchronously to improve efficiency. Sealing boxes 8 are provided on both sides at the lower end of the upper pump housing 1. The sealing boxes 8 are embedded. The flowing water inside the pump body directly contacts the outer walls of the sealing boxes 8, which can ensure the heat dissipation effect of the sealing boxes 8. The second gear 39 is driven to rotate by the servo motor 34 provided inside the sealing box 8, and then the first gear 31 is driven to rotate through the meshing between the second gear 39 and the first gear 31. A sealing bearing is provided at the connection between the connecting rod 29 provided at the middle position of the first gear 31 and the sealing box 8. The first gear 31 drives the connecting rod 29 to rotate synchronously. The worm gear 15 provided at the end of the connecting rod 29 and the spiral teeth 11 provided on the outer wall of the shaft rod 9 drive the shaft rod 9 to rotate synchronously under the action of meshing transmission. A stabilizing rod 30 is also fixedly installed on the outer wall of the sealing box 8. The upper end of the stabilizing rod 30 is rotatably connected to the connecting rod 29, which reduces the amplitude of the connecting rod 29 shaking during rotation while ensuring the normal rotation of the connecting rod 29, ensures the meshing accuracy between the worm gear 15 and the spiral teeth 11, and at the same time avoids affecting the sealing performance at the connection between the connecting rod 29 and the sealing box 8 when the connecting rod 29 shakes;

[0049] When the servo motor 34 fails and needs to be replaced, the user can disassemble the waterproof cover 7 from the end of the sealed box 8 and then rotate the threaded rod 36. The first bevel gear 40 fixedly connected to the end of the threaded rod 36 is meshed with the second bevel gear 41. When the threaded rod 36 rotates, it can drive the second bevel gear 41 to drive the threaded sleeve 37 to rotate synchronously. The pressing block 38 fixedly connected to the end of the threaded sleeve 37 is slidably connected to the cross bar 46. When the threaded sleeve 37 rotates, it can pull the pressing block 38 to move upward. After the pressing block 38 moves upward, it does not squeeze the outer wall of the servo motor 34. After the pressing block 38 does not squeeze and fix the servo motor 34, the user can pull the servo motor 34 outward so that the insertion rod 44 fixedly installed at its end is removed from the inside of the cross groove 43, thereby disassembling and replacing the servo motor 34. After the servo motor 34 is replaced, the user can reinsert the insertion rod 44 fixedly installed at the end of the replaced servo motor 34 into the inside of the cross groove 43, and then rotate the threaded rod 36 so that the pressing block 38 slides downward along the surface of the guide vane 4 and the sealed box 8 to squeeze and fix the outer wall of the servo motor 34, thereby realizing the rapid replacement of the servo motor 34;

[0050] When the sealed box 8 leaks water during use, a humidity sensitive resistor strip is provided below the first gear 31 on the bottom surface of the sealed box 8. When water leaks from the outer wall of the sealed box 8, the water flows along the inner wall of the sealed box 8 to the bottom surface of the sealed box 8. After the humidity sensitive resistor strip absorbs water, its resistance drops significantly, thereby triggering the buzzer alarm, and the alarm emits a warning to remind the relevant staff to repair the inside of the sealed box 8;

[0051] When replacing the servo motor 34 or repairing the interior of the sealed box 8, the user can first pull outwards the limit pin 18 provided between the pressing plate 16 and the outer wall at the end of the waterproof cover 7. Then, the user simultaneously presses the pressing plates 16 provided on both sides of the waterproof cover 7, causing the sliding rods 19 fixedly connected to both ends of the pressing plates 16 to move towards the inside of the installation groove 27. When the sliding rods 19 slide towards the inside of the installation groove 27, the ends of the sliding rods 19 squeeze the first rack plate 20 to slide. Under the action of the steering gear 21 provided between the first rack plate 20 and the second rack plate 22, the sliding direction of the second rack plate 22 is opposite to that of the first rack plate 20. The second rack plate 22 pushes the movable block 23 towards the end of the waterproof cover 7. The movable blocks 23 provided at both ends of the clamping rod 26 both slide towards the end of the waterproof cover 7, thereby driving the clamping rod 26 to move outwards from the end of the stop block 28 and not engaging with the stop block 28. When the clamping rods 26 provided at both ends of the waterproof cover 7 do not engage with the stop block 28, the user can quickly remove the waterproof cover 7 from the end of the sealed box 8, thus facilitating the repair of the interior of the sealed box 8 and the replacement of components. After the operation on the interior of the sealed box 8 is completed, the user aligns the waterproof cover 7 with the end of the sealed box 8 and squeezes it. The clamping rods 26 provided at both ends of the waterproof cover 7 slide towards both ends under the action of the wedge-shaped stop block 28. When the clamping rods 26 slide along the outer wall of the stop block 28 to the end of the stop block 28, the return spring 25 squeezes the movable block 23 to reset the clamping rod 26, so that the clamping rod 26 moves to the end of the stop block 28 and engages with the stop block 28. After the clamping rods 26 provided at both ends of the waterproof cover 7 engage with the stop blocks 28 provided at both ends of the sealed box 8, the sealing strip 45 provided on the circumferential side of the inner wall of the waterproof cover 7 is squeezed tightly against the circumferential outer wall of the sealed box 8, thereby ensuring the sealing performance at the connection between the sealed box 8 and the waterproof cover 7. After the waterproof cover 7 is installed, the abutting rod 47 fixedly installed on the inner wall of the waterproof cover 7 squeezes the outer wall at the end of the servo motor 34 to further limit the servo motor 34 and prevent the servo motor 34 from shaking during operation. Moreover, the end of the abutting rod 47 is inserted into the docking groove opened at the end of the servo motor 34, which can further enhance the limiting effect on the servo motor 34.

[0052] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

[0053] 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, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A waterproof multi-stage centrifugal energy-saving pump for oil mining, comprising an upper pump casing (1) and a lower pump casing (5), characterized in that: A recovery bin (6) is fixedly installed between the upper pump casing (1) and the lower pump casing (5); a water inlet (2) is fixedly installed at the upper end of the upper pump casing (1); a water outlet (3) is fixedly installed on the upper outer wall of the lower pump casing (5); guide vanes (4) are fixedly installed inside the upper pump casing (1) and the lower pump casing (5); a shaft (9) is rotatably installed at the middle position inside the upper pump casing (1) and the lower pump casing (5); an inducer (10) is fixedly installed at the end of the shaft (9); the shaft (9) is connected to the recovery bin ( 6) is provided with a kinetic energy recovery module (14), the shaft (9) is connected to the outer wall of the interior of the upper pump casing (1) and a plurality of positive impellers (12) are fixedly installed, the shaft (9) is connected to the outer wall of the interior of the lower pump casing (5) and a plurality of reverse impellers (13) are fixedly installed, the outer wall of the end of the upper pump casing (1) is provided with a sealing box (8) embedded in the interior of the upper pump casing (1), a driving component is provided in the interior of the sealing box (8), and a sealing component is movably installed at the end of the sealing box (8) located outside the upper pump casing (1); The driving assembly comprises a second gear (39) rotatably mounted on the inner wall of the sealing box (8), and also comprises a servo motor (34) driving the second gear (39) to rotate. The inner wall of the sealing box (8) is also rotatably mounted with a first gear (31) meshingly connected with the second gear (39). A connecting rod (29) is fixedly mounted at the center position of the first gear (31). The end of the connecting rod (29) passes through the sealing box (8), and the end of the connecting rod (29) extends to the interior of the upper pump housing (1). The connecting rod (29) is rotatably connected to the sealing box (8). A worm gear (15) is fixedly mounted at the end of the connecting rod (29). A helical tooth (11) meshingly connected with the worm gear (15) is fixedly mounted on the outer wall of the shaft (9) at a position corresponding to the worm gear (15). The driving assembly also comprises a quick-release structure inside the sealing box (8) for assisting the installation of the servo motor (34). The sealing assembly comprises a waterproof cover (7) movably mounted at the end of a sealing box (8), clamping rods (26) are movably mounted at both ends of the interior of the waterproof cover (7), and blocking blocks (28) used in conjunction with the clamping rods (26) are fixedly mounted on both sides of the outer walls of the sealing box (8) near the end of the waterproof cover (7).

2. A waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 1, characterized in that: The quick-release structure comprises a cross bar (46) fixedly mounted inside the sealing box (8), a docking rod (42) rotatably mounted at the center position of the cross bar (46), one end of the docking rod (42) being fixedly connected to the center position of the second gear (39), a cross slot (43) being provided at the other end of the docking rod (42), an insertion rod (44) matched with the cross slot (43) being fixedly mounted at the output end of the servo motor (34), and the insertion rod (44) being plugged and mounted inside the cross slot (43), the quick-release structure also comprises a lifting seat (32) fixedly mounted on the inner wall of the lower end of the sealing box (8), a supporting platform (33) being fixedly mounted at the upper end of the lifting seat (32), an arc-shaped placement groove being provided on the upper end surface of the supporting platform (33), the servo motor (34) being placed inside the arc-shaped placement groove, a pressure block (38) being slidably mounted on the upper part of the cross bar (46), and the pressure block (38) being arranged above the servo motor (34).

3. A waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 2, characterized in that: A second bevel gear (41) is rotatably mounted on the top inner wall of the sealing box (8); a threaded sleeve (37) is fixedly connected to the end of the second bevel gear (41); the end of the threaded sleeve (37) is fixedly connected to the pressing block (38); a rectangular plate (35) is also fixedly mounted on the top inner wall of the sealing box (8); the rectangular plate (35) is arranged outside the second bevel gear (41); a threaded rod (36) is threadedly connected to the rectangular plate (35); and a first bevel gear (40) meshingly connected to the second bevel gear (41) is fixedly mounted on one end of the threaded rod (36) close to the second bevel gear (41).

4. A waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 3, characterized in that: The waterproof cover (7) is provided with mounting grooves (27) at positions corresponding to the two ends of the clamping rod (26), the two ends of the clamping rod (26) are slidably mounted in the mounting grooves (27), and a control structure for controlling the movement of the clamping rod (26) is arranged inside the mounting grooves (27).

5. A waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 4, characterized in that: The control structure comprises a movable block (23) fixedly mounted at the end of a clamping rod (26); a return spring (25) is fixedly connected between the movable block (23) and the inner wall of the end of a mounting groove (27); a second rack plate (22) is slidably mounted on the inner wall of the bottom surface of the mounting groove (27); the end of the second rack plate (22) is fixedly connected to the movable block (23); the interior of the mounting groove (27) is located above the second rack plate (22) and is rotatably connected to a meshing connection with the second rack plate (22). The first rack plate (20) meshingly connected to the steering gear (21) is also slidably mounted on the top inner wall of the mounting groove (27); the outer wall of one end of the first rack plate (20) close to the movable block (23) is fixedly connected to a slide rod (19); the other end of the slide rod (19) away from the first rack plate (20) extends to the outside of the waterproof cover (7); and the slide rod (19) passes through the outer wall of the end of the waterproof cover (7) and is slidably connected to the connection of the waterproof cover (7).

6. A waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 5, characterized in that: A guide rod (24) is slidably connected to an outer wall of one side of the movable block (23) corresponding to the reset spring (25); the guide rod (24) is arranged inside the reset spring (25); and the other end of the guide rod (24) away from the movable block (23) is fixedly connected to the inner wall of the end of the mounting groove (27).

7. A waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 6, characterized in that: The ends of two sliding rods (19) arranged on the same side of the waterproof cover (7) are fixedly connected to a pressing plate (16), a fixing block (17) is fixedly installed on the outer wall of the waterproof cover (7), a limit pin (18) is slidably installed on the fixing block (17), and the cross section of the limit pin (18) is L-shaped.

8. The waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 7 is characterized in that: Sealing strips (45) are fixedly mounted on the inner wall circumference of the waterproof cover (7), and the cross-sectional shape of the sealing strips (45) arranged at both ends of the waterproof cover (7) matches the stopper (28).

9. A waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 8, characterized in that: A stabilizing rod (30) is fixedly mounted on an outer wall of one side of the sealing box (8) corresponding to the connecting rod (29), and the connecting rod (29) is rotatably connected to the upper end of the stabilizing rod (30).

10. A waterproof multi-stage centrifugal energy-saving pump for oil mining according to claim 9, characterized in that: A push rod (47) is fixedly mounted on the inner wall of the waterproof cover (7) at a position corresponding to the servo motor (34), and a docking groove matching the push rod (47) is provided on the outer wall at the end of the servo motor (34).

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