Oil-gas-solid-liquid mixed transportation magnetic drive centrifugal pump

Abstract

The utility model discloses an oil-gas solid-liquid mixed transportation magnetic force driving centrifugal pump which comprises a shell, an impeller, a fixing cover and a motor, the shell is fixedly installed on the fixing cover, a rotating shaft of the motor extends into the fixing cover, the shell comprises an impeller shell and an installation shell, the impeller shell and the installation shell are fixedly connected to form an impeller bin inside, and the impeller is rotatably installed on the installation shell through a shaft rod. The motor can drive the impeller to rotate, the impeller is located in the impeller bin, the installation shell is provided with a guide groove, the impeller is provided with a guide plate, at least one part of the guide plate is located in the guide groove, a spring is installed in the guide groove, and the guide plate is supported by the spring. And when the pressure is too large, the impeller can be far away from the impeller shell to increase the passing flow, and the impeller is more suitable for oil-gas-solid-liquid mixed transportation.

Description

Technical Field

[0001] This utility model relates to the field of magnetic centrifugal pump technology, and more specifically, to a magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport. Background Technology

[0002] In existing technologies, magnetic centrifugal pumps are generally used for the transportation of liquids or gases. A magnetic pump consists of three parts: a pump, a magnetic drive, and a motor. The key component, the magnetic drive, consists of an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic isolation sleeve. The inner magnetic rotor drives the impeller to rotate, generating centrifugal force to achieve the effect of transporting the medium. In order to balance the pressure on both sides of the impeller, the impeller and the isolation sleeve are usually filled with medium to achieve the effect of balancing the pressure. However, when oil, gas, solid, and liquid mixtures need to be transported, if there are solid particles in the medium, the solid particles will enter the isolation sleeve, affecting the bearings on the shaft and easily causing blockage. Therefore, a technical solution is needed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art, prevent the presence of a solid shell in the medium from affecting the bearing, and provide a magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport, comprising a housing, an impeller, a fixed cover, and a motor. The housing is fixedly installed on the fixed cover, and the motor shaft extends into the fixed cover. The housing includes an impeller housing and a mounting housing. The impeller housing and the mounting housing are fixedly connected to form an impeller chamber inside. The impeller is rotatably installed on the mounting housing via a shaft. The motor can drive the impeller to rotate. The impeller is located in the impeller chamber. The mounting housing is provided with a guide groove, and the impeller is provided with a guide plate. At least a portion of the guide plate is located in the guide groove, and a spring is installed in the guide groove to support the guide plate.

[0006] Furthermore, the guide groove is annular, and a planar bearing is installed in the guide groove. The planar bearing is movable along the guide groove. The planar bearing includes a first cover plate and a second cover plate. The first cover plate is connected to the guide plate, and the spring abuts against the second cover plate.

[0007] Furthermore, the first cover plate is located at the end of the planar bearing facing the guide plate, the first cover plate is provided with a slot, the guide plate is provided with a block corresponding to the slot, and the block is at least partially located in the slot.

[0008] Furthermore, a limiting groove is formed on the side wall of the guide groove, and the second cover is provided with a limiting block corresponding to the limiting groove, the limiting block being able to move along the limiting groove.

[0009] Furthermore, the mounting shell is fitted with a cover plate, which is mounted on the end face of the mounting shell facing the impeller, and the cover plate closes the end face of the limiting groove facing the impeller.

[0010] Furthermore, the impeller housing includes an inlet and an outlet, the inlet and the outlet are connected to the impeller chamber, the inlet is concentrically arranged with the impeller, and the outlet is located on the side wall of the impeller housing.

[0011] Furthermore, the impeller includes a body, blades, a cover plate, and an end cap. The guide plate is located on the side of the body facing the mounting shell. The blades are provided with multiple blades arranged in a ring. The cover plate has an opening facing the inlet. The end cap fixes the body to the shaft.

[0012] Furthermore, the fan blade includes an extension end that extends beyond the range of the main body and is close to the inner wall of the impeller housing.

[0013] Furthermore, the end cap is conical, and the diameter of the end cap gradually decreases in the direction away from the mounting shell.

[0014] The beneficial effects of this utility model are:

[0015] This invention features an independently set impeller chamber. The impeller is supported by a plane bearing and spring between itself and the mounting housing to stabilize its rotation. It automatically adjusts the pressure of the medium received by the impeller. When the impeller is subjected to excessive pressure, the gap between the impeller and the impeller housing is increased. The extended impeller blades can better drive the solid particles in the impeller chamber for transportation, making it more suitable for oil-gas-solid-liquid mixed transportation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0018] Figure 3 This is a schematic diagram of an impeller in this embodiment.

[0019] Figure 4 This is a schematic diagram of another direction of the impeller in this embodiment.

[0020] Reference numerals: 1. Shell; 11. Impeller shell; 111. Inlet; 112. Outlet; 12. Mounting shell; 121. Guide groove; 122. Limiting groove; 13. Impeller chamber; 14. Cover plate; 15. Surface bearing; 151. First cover plate; 1511. Slot; 152. Second cover plate; 1521. Limiting block; 16. Spring; 2. Impeller; 21. Main body; 211. Guide plate; 2111. Slot; 22. Fan blade; 221. Extension end; 23. Cover plate; 231. Opening; 24. End cover; 25. Shaft; 251. Inner magnetic ring; 3. Fixing cover; 31. Magnetic chamber; 4. Motor; 41. Rotating shaft; 42. Magnetic frame; 43. Magnetic sheet. Detailed Implementation

[0021] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1 , Figure 2 As shown, this embodiment discloses a magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport, including a housing 1, an impeller 2, a fixed cover 3, and a motor 4. The motor 4 has a rotating shaft 41. The fixed cover 3 is rotatably connected to the rotating shaft 41 via bearings. The fixed cover 3 is in a fixed state. The rotating shaft 41 of the motor 4 extends into the fixed cover 3 and can rotate. A magnetic frame 42 is mounted on the rotating shaft 41. The fixed cover 3 and the housing 1 form a magnetically conductive chamber 31. The magnetic frame 42 is located inside the magnetically conductive chamber 31. The magnetic frame 42 has a cylindrical cavity at its center. A magnetic sheet 43 is installed on the inner wall of the frame 42. The housing 1 is fixedly installed on the fixed cover 3. The impeller 2 is rotatably installed on the housing 1 via the shaft 25. Shaft seals are installed at the connection between the shaft 25 and the housing 1 for sealing. The other end of the shaft 25 extends into the interior of the magnetic frame 42. An inner magnetic ring 251 is installed on the shaft 25. The inner magnetic ring 251 is located inside the magnetic frame 42 and corresponds to the magnetic sheet 43 on the magnetic frame 42. The motor 4 drives the magnetic frame 42 to rotate, which in turn drives the inner magnetic ring 251 and the shaft 25 to rotate, causing the impeller 2 to rotate, thus realizing the function of a centrifugal pump.

[0023] The housing 1 includes an impeller housing 11 and a mounting housing 12. The impeller housing 11 and the mounting housing 12 are fixedly connected to form an impeller chamber 13 inside. The impeller 2 is located inside the impeller chamber 13. The impeller housing 11 includes an inlet 111 and an outlet 112. The inlet 111 and the outlet 112 are connected to the impeller chamber 13. The inlet 111 is concentrically arranged with the impeller 2. The outlet 112 is located on the side wall of the impeller housing 11. When the impeller 2 rotates, a negative pressure is generated at the inlet 111, which draws the medium into the impeller chamber 13 from the inlet 111. The medium forms a vortex through the rotation of the impeller 2 and flows out from the outlet 112 along the inner wall of the impeller housing 11.

[0024] The impeller 2 includes a main body 21, fan blades 22, a cover plate 23, and an end cap 24. The fan blades 22 are arranged in a ring and are curved. When the impeller 2 rotates, they can generate vortices better. The cover plate 23 has an opening 231 facing the inlet 111. The medium enters the opening 231 from the inlet 111 and flows between the two fan blades 22. During the rotation of the fan blades 22, the medium is centrifugally transported from the center of the main body 21 to the outer periphery of the main body 21, thereby causing the medium in the impeller chamber 13 to generate vortices and be transported outward.

[0025] More preferably, the fan blade 22 includes an extension end 221 that extends out of the range of the main body 21 and is close to the inner wall of the impeller housing 11. Since there are particles in the medium during the mixed transport of oil, gas and solid liquid, they are easy to accumulate at the lower end of the impeller housing 13, causing blockage and hindering the rotation of the impeller 2. By lengthening the fan blade 22 of the impeller 2, the fan blade 22 can be closer to the side wall of the impeller housing 13, so that when the impeller 2 rotates, it can better drive the solid particles of the medium in the impeller housing 13 to be transported, preventing deposition and accumulation.

[0026] The end cap 24 fixes the main body 21 to the shaft 25. The end cap 24 is conical, and the diameter of the end cap 24 gradually decreases in the direction away from the mounting shell 12. The conical end cap 24 can better divert the medium entering from the inlet 111 and evenly distribute it between each pair of fan blades 22 to achieve equal flow. The end cap 24 can both fix the impeller 2 and better transport the medium.

[0027] The mounting housing 12 is provided with a guide groove 121, which is annular. A planar bearing 15 is installed in the guide groove 121 and can move along the guide groove 121. The planar bearing 15 includes a first cover plate 151 and a second cover plate 152. The impeller 2 is provided with a guide plate 211, which is located on the side of the main body 21 facing the mounting housing 12. At least a portion of the guide plate 211 is located in the guide groove 121. The first cover plate 151 is connected to the guide plate 211 and is located at the end of the planar bearing 15 facing the guide plate 211. The first cover plate 151 is provided with a retaining groove 1511. The guide plate 211 is provided with a locking block 2111 corresponding to the locking slot 1511. The locking block 2111 is at least partially located in the locking slot 1511. When the impeller 2 rotates, it can drive the first cover plate 151 to rotate together. The first cover plate 151 and the second cover plate 152 rotate relative to each other. The side wall of the guide groove 121 is provided with a limiting groove 122. The second cover plate 152 is provided with a limiting block 1521 corresponding to the limiting groove 122. The limiting block 1521 can move along the limiting groove 122. The second cover plate 152 can only move along the limiting groove 122 and will not rotate due to the limitation between the limiting groove 122 and the limiting block 1521.

[0028] Mounting housing 12 is fitted with cover plate 14. Cover plate 14 is installed on the end face of mounting housing 12 facing impeller 2. Cover plate 14 closes the end face of limiting groove 122 facing impeller 2 to prevent medium from entering guide groove 121 and affecting plane bearing 15.

[0029] A spring 16 is installed in the guide groove 121. The spring 16 supports the guide plate 211 and abuts against the second cover plate 152. The pressure of the spring 16 causes the plane bearing 15 to abut against the guide plate 211, so that the locking block 2111 can always be engaged with the locking groove 1511. Since the impeller 2 will be subjected to the pressure of the medium entering through the inlet 111 when it rotates, the spring 16 can support the side of the impeller 2 facing the mounting shell 12, making the rotation of the impeller 2 more stable. When there are more solid particles in the medium, the pressure on the impeller 2 will be greater. At this time, the impeller 2 will compress the spring 16, making the distance between the opening 231 and the inlet 111 larger. The gap between the cover plate 23 and the impeller shell 11 increases, increasing the space for the medium passing through the cover plate 23 and the impeller shell 11, preventing the internal medium from becoming blocked.

[0030] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A magnetically driven centrifugal pump for transporting oil, gas, solids, and liquids, characterized in that, The device includes a housing (1), an impeller (2), a mounting cover (3), and a motor (4). The housing (1) is fixedly mounted on the mounting cover (3). The shaft (41) of the motor (4) extends into the mounting cover (3). The housing (1) includes an impeller housing (11) and a mounting housing (12). The impeller housing (11) and the mounting housing (12) are fixedly connected to form an impeller chamber (13) inside. The impeller (2) is rotatably mounted on the mounting housing (12) via a shaft (25). The motor (4) can drive the impeller (2) to rotate. The impeller (2) is located inside the impeller chamber (13). The mounting housing (12) is provided with a guide groove (121). The impeller (2) is provided with a guide plate (211). At least a portion of the guide plate (211) is located in the guide groove (121). A spring is installed in the guide groove (121). The spring (16) supports the guide plate (211).

2. The oil-gas-solid-liquid mixed transport magnetically driven centrifugal pump according to claim 1, characterized in that, The guide groove (121) is annular, and a plane bearing (15) is installed in the guide groove (121). The plane bearing (15) can move along the guide groove (121). The plane bearing (15) includes a first cover plate (151) and a second cover plate (152). The first cover plate (151) is connected to the guide plate (211), and the spring (16) abuts against the second cover plate (152).

3. The magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport according to claim 2, characterized in that, The first cover plate (151) is located at one end of the plane bearing (15) facing the guide plate (211). The first cover plate (151) is provided with a slot (1511). The guide plate (211) is provided with a block (2111) corresponding to the slot (1511). The block (2111) is at least partially located in the slot (1511).

4. The magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport according to claim 2, characterized in that, The guide groove (121) has a limiting groove (122) on its side wall, and the second cover plate (152) has a limiting block (1521) corresponding to the limiting groove (122). The limiting block (1521) can move along the limiting groove (122).

5. The magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport according to claim 4, characterized in that, The mounting shell (12) is fitted with a cover plate (14), which is mounted on the end face of the mounting shell (12) facing the impeller (2). The cover plate (14) closes the end face of the limiting groove (122) facing the impeller (2).

6. The magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport according to claim 1, characterized in that, The impeller housing (11) includes an inlet (111) and an outlet (112), the inlet (111) and the outlet (112) are connected to the impeller compartment (13), the inlet (111) is concentrically arranged with the impeller (2), and the outlet (112) is located on the side wall of the impeller housing (11).

7. The oil-gas-solid-liquid mixed transport magnetically driven centrifugal pump according to claim 6, characterized in that, The impeller (2) includes a main body (21), fan blades (22), a cover plate (23), and an end cap (24). The guide plate (211) is located on the side of the main body (21) facing the mounting shell (12). The fan blades (22) are provided with a plurality of fan blades arranged in a ring. The cover plate (23) is provided with an opening (231) facing the inlet (111). The end cap (24) fixes the main body (21) to the shaft (25).

8. The magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport according to claim 7, characterized in that, The fan blade (22) includes an extension end (221) that extends out of the body (21) and is close to the inner wall of the impeller housing (11).

9. The magnetically driven centrifugal pump for oil-gas-solid-liquid mixed transport according to claim 7, characterized in that, The end cap (24) is conical, and the diameter of the end cap (24) gradually decreases in the direction away from the mounting shell (12).

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