Screw pump sand removing device
By introducing a motor-driven impeller into the screw pump to generate centrifugal force to separate liquid and silt, the problem of low water output efficiency and wear caused by silt in screw pumps is solved, achieving efficient liquid transportation and extended equipment life.
Patent Information
- Application Number
- CN202520185576.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-02-06
AI Technical Summary
Existing screw pumps have low water output efficiency in oil wells due to the presence of a lot of silt, which also accelerates the wear of the rotor and stator, reducing their service life.
A screw pump sand removal device was designed, including a motor, a sand discharge mechanism and a screw mechanism. The impeller rotation generates radial centrifugal force to throw the mud and sand onto the inner wall of the long pipe and discharge it through the sand discharge hole, while the liquid is transported through the middle area to achieve the separation of liquid and mud and sand.
This improved the water output efficiency of the screw pump and extended the service life of the pump unit.
Smart Images
Figure CN223634891U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw pump technical field especially is related to a screw pump sand removing device. BACKGROUND
[0002] Screw pump is a kind of pump that water body is spirally raised along the axis by the rotation of screw blade.Screw pump is widely used in many fields.It is mainly applied to petroleum chemical industry, environmental protection water treatment, chemical production and other fields, wherein, screw pump is mainly used for conveying various corrosive liquids and high temperature and high pressure medium in petroleum chemical industry.
[0003] At present, screw pump used for oil well cannot separate liquid and silt in the working process of screw pump due to more silt in well, which leads to low water yield efficiency of pump, and can accelerate the wear of screw pump rotor and stator rubber and even lock rotor, reduce the service life of screw pump. UTILITY MODEL CONTENT
[0004] The utility model discloses a kind of screw pump sand removing devices, to solve the problem that screw pump in prior art is caused by silt and leads to low water yield, the screw pump sand removing device of the utility model can effectively separate liquid and silt, improve the water yield efficiency of pump, and improve the service life of pump unit.
[0005] The utility model provides a kind of screw pump sand removing device, including motor, sand discharging mechanism and screw mechanism, the sand discharging mechanism includes connecting shaft and long tube, the long tube is set on the outer side of the connecting shaft, at least one impeller is connected on the connecting shaft, a plurality of sand discharging holes are arranged on the upper wall of the long tube, one end of the connecting shaft is connected with the output shaft of the motor and the other end is connected with the screw pump rotor of the screw mechanism.
[0006] As a preferred scheme of the utility model, a partition tube is arranged on the connecting shaft and close to one end of the screw mechanism, and a liquid channel is formed between the partition tube and the connecting shaft.
[0007] As a preferred scheme of the utility model, the outer side of the partition tube is connected with the inner wall of the long tube by connecting sleeve, and sand discharging hole is arranged on the long tube outside the partition tube.
[0008] As a preferred scheme of the utility model, at least two blades are provided on the impeller, the blade is flat plate structure, and the plane of the blade is parallel to the axis of the connecting shaft.
[0009] As a preferred scheme of the utility model, two blades are connected by arc-shaped plate, and the arc-shaped plate is connected to the connecting shaft.
[0010] As a preferred scheme of the utility model, the arc-shaped plate is welded with the connecting shaft.
[0011] As a preferred scheme of the utility model, the impeller is provided with two, and the two impellers are distributed along the axial direction of the connecting shaft.
[0012] As a preferred scheme of the utility model, four sand discharging holes are arranged around each impeller, the four sand discharging holes are different in axial setting height, and the projections of the four sand discharging holes on the radial plane are arranged in 90°.
[0013] Compared with the prior art, the utility model has the following positive effects:
[0014] The screw pump sand discharging device provided by the utility model comprises a motor, a sand discharging mechanism and a screw mechanism, the sand discharging mechanism comprises a connecting shaft and an elongated pipe, the elongated pipe is arranged on the outer side of the connecting shaft, at least one impeller is connected on the connecting shaft, a plurality of sand discharging holes are arranged on the side wall of the elongated pipe, one end of the connecting shaft is connected with the output shaft of the motor and the other end is connected with the screw pump rotor of the screw mechanism. When the screw pump sand discharging device in the utility model works, the motor drives the connecting shaft to rotate and drives the impeller to rotate synchronously, radial centrifugal force is generated to throw the silt to the inner wall of the elongated pipe and discharge the silt through the sand discharging holes on the side wall of the elongated pipe, liquid is conveyed to the screw mechanism through the middle area close to the connecting shaft, liquid and silt are effectively separated, the water output efficiency of the pump is improved, and the service life of the pump unit is improved. The device can be used for pumping oil well liquid and liquid with more silt. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.
[0016] Figure 1 It is the external structure schematic view of the screw pump sand discharging device of the utility model;
[0017] Figure 2 It is the internal structure schematic view of the screw pump sand discharging device of the utility model;
[0018] Figure 3 It is the internal structure schematic view of the sand discharging mechanism and the screw mechanism in the utility model;
[0019] Figure 4 It is the structure schematic view of the elongated pipe and the separation pipe in the utility model;
[0020] Figure 5 is a structure schematic view of the long tube in the utility model;
[0021] Figure 6 is a structure schematic view when the impeller is connected with the connecting shaft in the utility model.
[0022] In the figure: 1, motor; 2, sand discharging mechanism; 21, long tube; 211, sand discharging hole; 22, connecting shaft; 23, impeller; 231, blade; 232, arc plate; 233, welding position; 24, partition tube; 25, connecting sleeve; 26, liquid channel; 27, sand discharging channel; 3, screw mechanism; 31, screw pump rotor; 32, screw pump stator; 4, connecting head. DETAILED DESCRIPTION
[0023] In the description of the utility model, it needs to be explained that, unless otherwise specified, the meaning of "multiple" is two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front end", "rear end", "head", "tail" and the like is the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplification, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0024] In the description of the utility model, it also needs to be explained that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0025] The specific embodiments of the utility model will be further described in detail below in combination with the drawings.
[0026] Example 1:
[0027] The screw pump sand removal device provided in the embodiment, like Figures 1-6As shown, the device comprises a motor 1, a sand-removing mechanism 2 and a screw mechanism 3. The sand-removing mechanism 2 comprises a connecting shaft 22 and a long tube 21 arranged outside the connecting shaft 22, and at least one impeller 23 connected to the connecting shaft 22. A plurality of sand-removing holes 211 are arranged on the side wall of the long tube 21. The plurality of sand-removing holes 211 can be arranged at different positions of the side wall of the long tube 21. The outer surface of the long tube 21 is polished. The connecting shaft 22 can be a steel connecting piece. One end of the connecting shaft 22 is connected to the output shaft of the motor 1, and the other end is connected to the screw pump rotor 31 of the screw mechanism 3. The outer side of the screw pump rotor 31 is provided with a screw pump stator 32. One end of the long tube is sealingly connected to the end face of the motor, and the other end of the long tube is connected to the screw pump stator 32 of the screw mechanism 3 through a connecting head 4.
[0028] When the screw pump sand-removing device in the embodiment works, the motor 1 drives the connecting shaft 22 to rotate and drives the impeller 23 to rotate synchronously, generating a radial centrifugal force to throw the sand to the inner wall of the long tube 21 and discharge the sand through the sand-removing holes 211 on the side wall of the long tube 21, while the liquid is transported to the screw mechanism 3 through the middle area close to the connecting shaft 22, effectively separating the liquid and the sand, improving the water output efficiency of the pump, and prolonging the service life of the pump unit.
[0029] The screw pump sand-removing device of the embodiment can be used for pumping oil well liquid and liquid with a large amount of sand.
[0030] As a preferred embodiment, a partition tube 24 is arranged on the connecting shaft 22 close to one end of the screw mechanism 3, and a liquid channel 26 is formed between the partition tube 24 and the connecting shaft 22. The partition tube 24 can be a conical structure or a circular tube structure.
[0031] As a preferred embodiment, the outer side of the partition tube 24 is connected to the inner wall of the long tube 21 through a connecting sleeve 25, the connecting sleeve 25 and the inner wall of the long tube 21 can be fixed by hot fitting, and the partition tube 24 and the connecting sleeve 25 can be connected by interference fit. The sand-removing holes 211 are arranged on the long tube 21 outside the partition tube. A sand-removing channel 27 is formed between the partition tube 24 and the long tube 21, and the sand-removing holes 211 can be arranged at one end of the sand-removing channel 27 close to the connecting sleeve 25.
[0032] In the embodiment, the motor drives the connecting shaft 22 and the impeller to rotate, generating a radial centrifugal force to throw the sand to the inner wall of the long tube and discharge the sand through the sand-removing holes of the long tube, while the liquid is transported to the screw mechanism 3 through the liquid channel 26 inside the partition tube 24, and the sand is separated into the sand-removing channel 27 and discharged through the sand-removing holes 211, thereby realizing effective separation of the liquid and the sand.
[0033] As a preferred embodiment, as shown in FIG. 4, Figure 5As shown, the impeller 23 has at least two blades 231, which are flat plate structures and the planes of the blades 231 are parallel to the axis of the connecting shaft 22. The blades 231 can effectively stir the silt to rotate and move to the pipe wall of the long pipe 21 under the centrifugal force.
[0034] In addition, it should be noted that the blades 231 can also be spiral or other shapes.
[0035] As a preferred embodiment, the two blades 231 are connected by an arc plate 232, which is connected to the connecting shaft 22. The arc of the arc plate 232 is 180°, and the two blades 231 are arranged in the same plane. The arc plate 232 is attached to the connecting shaft 22. The impeller 23 has a simple structure and is easy to connect.
[0036] As a preferred embodiment, the arc plate 232 is welded to the connecting shaft 22. As shown, Figure 6 welding points 233 are provided at the connection between the arc plate 232 and the blades 231, and the impeller 23 is welded to the connecting shaft 22 by the two welding points 233.
[0037] As a preferred embodiment, two impellers 23 are provided, which are distributed along the axial direction of the connecting shaft 22 to achieve two-stage separation of liquid and silt and improve the separation efficiency.
[0038] As a preferred embodiment, four silt discharge holes 211 are provided around each impeller 23, the four silt discharge holes 211 are arranged at different heights in the axial direction, and the projections of the four silt discharge holes 211 on the radial plane are arranged at 90°. The four silt discharge holes 211 are uniformly arranged in the circumferential direction of the long pipe, thereby achieving multi-directional silt discharge and improving the silt discharge efficiency.
[0039] The screw pump sand removal device of the embodiment removes the oil well liquid, as shown, Figure 2 the motor 1 is arranged at the bottom of the well, and the sand discharge mechanism 2 and the screw mechanism 3 are arranged in sequence on the upper side of the motor 1. After the motor is started, the motor shaft rotates to drive the connecting shaft 22 to rotate, the extracted liquid enters the long pipe 21 from the end close to the motor, the impeller 23 rotates, the centrifugal force generated by the rotation of the impeller 23 is greater due to the large mass of the sand, so that the sand is spirally lifted and thrown to the inner wall of the long pipe 21 farther away from the connecting shaft 22, and then discharged through the silt discharge holes 211 on the long pipe 21, and the liquid is smaller. The centrifugal force of the liquid passes through the liquid passage 26 in the partition pipe 24 into the screw mechanism 3, thereby achieving sand-liquid separation.
[0040] Two impellers 23 can achieve two-stage sand discharge, and the sand discharge capacity is better. Four sand discharge holes 211 are arranged around each impeller 23, which is beneficial to sand discharge and does not affect the rigidity and strength of the long pipe 21. The remaining silt after two-stage sand discharge is brought to the sand discharge channel 27 outside the partition pipe 24 by the impeller 23, and finally discharged through the two sand discharge holes 211 at the uppermost of the long pipe 21.
[0041] The preferred embodiments of the utility model are described above, but the protection scope of the utility model is not limited to this, and any skilled person in the technical field can make several modifications and improvements without departing from the creative concept of the utility model, which should be covered in the protection scope of the utility model.
Claims
1. A screw pump desanding device characterized by, The utility model relates to a sand discharging device, which comprises a motor (1), a sand discharging mechanism (2) and a screw mechanism (3), wherein the sand discharging mechanism (2) comprises a connecting shaft (22) and a long tube (21) arranged outside the connecting shaft (22), at least one impeller (23) is connected to the connecting shaft (22), a plurality of sand discharging holes (211) are arranged on the sidewall of the long tube (21), one end of the connecting shaft (22) is connected to the output shaft of the motor (1) and the other end is connected to the screw pump rotor (31) of the screw mechanism (3).
2. A screw pump desanding device according to claim 1, wherein, A partition tube (24) is arranged on the connecting shaft (22) near one end of the screw mechanism (3), and a liquid channel (26) is formed between the partition tube (24) and the connecting shaft (22).
3. A screw pump desanding device according to claim 2, wherein, The outer side of the partition tube (24) is connected to the inner wall of the long tube (21) through a connecting sleeve (25), and sand discharging holes (211) are arranged on the long tube (21) outside the partition tube.
4. A screw pump desanding device according to claim 1, wherein, The impeller (23) has at least two blades (231), the blades (231) are in the form of flat plates, and the planes of the blades (231) are parallel to the axis of the connecting shaft (22).
5. A screw pump desanding device according to claim 4, wherein, Two blades (231) are connected through an arc-shaped plate (232) connected to the connecting shaft (22).
6. A screw pump desanding device according to claim 5, wherein, The arc-shaped plate (232) is welded to the connecting shaft (22).
7. A screw pump desanding device according to claim 1, wherein The impeller (23) is provided with two, and the two impellers (23) are distributed along the axial direction of the connecting shaft (22).
8. A screw pump desanding device according to claim 1, wherein, Four sand discharging holes (211) are arranged around each impeller (23), the four sand discharging holes (211) are arranged at different heights in the axial direction, and the projections of the four sand discharging holes (211) on the radial plane are arranged at an angle of 90°.