Pipeline transportation double-screw pump

Abstract

The utility model belongs to the technical field of screw pumps, and particularly relates to a pipeline transportation double-screw pump. Comprising two parallel main shafts, bearing components are symmetrically arranged at the two ends of each main shaft, the main shafts are sleeved with replaceable thread bushings, the thread bushings comprise a right-hand thread bushing and a left-hand thread bushing which are opposite in thread direction, one main shaft is sleeved with the right-hand thread bushing, the other main shaft is sleeved with the left-hand thread bushing, and the right-hand thread bushing is meshed with the left-hand thread bushing. The bearing part, the right-hand thread sleeve and the left-hand thread sleeve are sleeved with matched pipeline parts; a conveyed object is introduced into one end of the rotating main shaft and conveyed to the other end of the main shaft through the right-hand thread sleeve and the left-hand thread sleeve which are meshed.

Description

Technical Field

[0001] The utility model belongs to the technical field of screw pumps, in particular to a pipeline transmission twin-screw pump. Background Art

[0002] A twin-screw pump consists of a sealed chamber with a constant volume formed between meshing master and slave screws and the pump body or bushing. The medium moves axially as the master and slave screws rotate, achieving the pump's purpose of conveying fluids. The two screws of a twin-screw pump are driven by a pair of synchronous gears. Since the two screws do not directly contact each other, they can convey non-lubricating media, even those containing tiny solid abrasive particles, and are widely used in engineering fields. However, twin-screw pumps are prone to damage, and simply replacing the entire screw shaft is costly. Utility Model Content

[0003] The purpose of this utility model is to provide a pipeline twin-screw pump to solve the problems existing in the prior art. To achieve the above-mentioned purpose, the technical solution adopted by this utility model is:

[0004] A pipeline twin-screw pump comprises two parallel main shafts, with bearing components symmetrically provided at both ends of the main shafts, threaded sleeves sleeved on the main shafts, and the threaded sleeves comprising a right-handed threaded sleeve and a left-handed threaded sleeve with opposite thread directions, wherein the right-handed threaded sleeve is sleeved on one main shaft and the left-handed threaded sleeve is sleeved on the other main shaft, the right-handed threaded sleeve and the left-handed threaded sleeve are meshed, and an adaptive pipeline component is arranged outside the bearing components, the right-handed threaded sleeve and the left-handed threaded sleeve; the conveyed material is passed into one end of the rotating main shaft and conveyed to the other end of the main shaft through the meshed right-handed threaded sleeve and the left-handed threaded sleeve.

[0005] Furthermore, a limit strip is provided in the middle part of the main shaft along the length direction, and a strip groove adapted to the limit strip is provided on the inner wall of the threaded sleeve, and the strip groove and the limit strip are slidably connected; a threaded portion is provided at one end of the upper limit strip on the main shaft, and a gasket is provided at the other end, the threaded portion is threadedly connected to a clamping nut, the gasket and the clamping nut are connected to the threaded sleeve, and the end of the gasket away from the threaded sleeve abuts against the bearing component.

[0006] Furthermore, the bearing component includes a bearing seat, a through hole for the conveyed fluid to flow through is provided at the center of the seat, two through holes are symmetrically provided on both sides of the through hole, bearings are provided in the two through holes, and the main shaft is rotatably provided in the bearings.

[0007] Furthermore, the bearing includes a bearing outer ring and a bearing inner ring. The bearing outer ring is arranged in the through hole. Two compression sleeves are provided in the bearing outer ring. The bearing inner ring is rotatably provided between the two compression sleeves. A wear ring is provided on the main shaft, and the bearing inner ring is provided outside the wear ring.

[0008] Furthermore, one end of the bearing seat is fixedly connected to the inner shell by a pin shaft, a cavity with a size suitable for the threaded sleeve is provided inside the inner shell, a joint is provided at the other end of the bearing seat, a sealing ring 2 is provided between the bearing seat and the joint for sealing, and an outer shell for protection is provided outside the joint, the bearing seat and the inner shell; one end of the joint is provided with the outer shell, and the other end is connected to the delivery pipeline, and a sealing ring 1 for sealing is provided at the connection between the two ends of the joint.

[0009] Furthermore, an annular groove is provided on the main shaft, a baffle is provided in the annular groove, and the baffle abuts against one end of the bearing seat away from the threaded sleeve.

[0010] The utility model has the following beneficial effects: the spindle and the right-handed and left-handed threaded sleeves are arranged separately, allowing the sleeves to be replaced individually if damaged, reducing wear and tear costs. Sleeves of different sizes can also be replaced according to different application scenarios, making the device more adaptable. Wear rings are provided at locations on the spindle prone to friction. These wear rings replace the wear caused by the spindle's rotation and are relatively inexpensive compared to the spindle, thereby reducing maintenance costs. Multiple retaining rings are also provided at both ends of the bearing, serving both to secure the bearing and to provide a seal, preventing corrosion of the bearing's interior by the transported object. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a diagram of the internal structure of the device;

[0012] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0013] Figure 3 yes Figure 1 Middle AA section view;

[0014] Figure 4 yes Figure 1 Middle BB cross-section;

[0015] Description of labels:

[0016] Joint 1, sealing ring 1, 2, baffle 3, baffle 4, wear ring 5, bearing inner ring 6, bearing outer ring 7, bearing seat 8, gasket 9, right-handed threaded sleeve 10, left-handed threaded sleeve 11, compression nut 12, inner housing 13, outer housing 14, sealing ring 2 15, limit strip 16, pin 17, main shaft 18, compression sleeve 19, through hole 20. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0018] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0019] like Figure 1-4 As shown, a pipeline twin-screw pump includes two parallel main shafts 18, with bearing components symmetrically provided at both ends of the main shaft 18. A threaded sleeve is sleeved on the main shaft 18, and the threaded sleeve includes a right-handed threaded sleeve 10 and a left-handed threaded sleeve 11 with opposite thread directions. The right-handed threaded sleeve 10 is sleeved on one main shaft 18, and the left-handed threaded sleeve 11 is sleeved on the other main shaft 18. The right-handed threaded sleeve 10 and the left-handed threaded sleeve 11 are meshed. Adaptive pipeline components are arranged outside the bearing components, the right-handed threaded sleeve 10 and the left-handed threaded sleeve 11; the conveyed material is passed into one end of the rotating main shaft 18 and is conveyed to the other end of the main shaft 18 through the meshed right-handed threaded sleeve 10 and the left-handed threaded sleeve 11. The right-handed threaded sleeve 10 and the left-handed threaded sleeve 11 are engaged with each other, and the chamber inside the inner shell 13 is adapted to the threaded parts of the right-handed threaded sleeve 10 and the left-handed threaded sleeve 11, forming a closed space between the two adjacent threaded parts, pushing the conveyed object forward during the rotation of the right-handed threaded sleeve 10 and the left-handed threaded sleeve 11.

[0020] like Figure 1 、 4As shown, a limiting strip 16 is provided along the length of the main shaft 18. A strip groove is provided on the inner wall of the threaded sleeve to accommodate the limiting strip 16. The strip groove and the limiting strip 16 are slidably connected. The limiting strip 16 on the main shaft 18 has a threaded portion at one end and a washer 9 at the other end. The threaded portion is threadedly connected to a compression nut 12. The washer 9 and the compression nut 12 are connected to the threaded sleeve, and the end of the washer 9 away from the threaded sleeve abuts the bearing component. During use, the threaded sleeve may wear. Since the main shaft 18 and the threaded sleeve are not integrally formed, only the threaded sleeve can be replaced when it wears, thereby reducing costs. Furthermore, threaded sleeves of different lengths and sizes can be replaced as needed to meet different application scenarios, making the main shaft 18 and related accessories more adaptable. The washer 9 abuts the bearing seat 8 and the threaded sleeve at both ends. The thickness of the washer 9 can be adjusted as needed. The compression nut 12 and the washer 9 work together to secure the threaded sleeve to the main shaft 18.

[0021] like Figure 2 As shown, the bearing assembly includes a bearing seat 8, with a through-hole 20 at the center thereof for the conveyed fluid to flow through. Two through-holes are symmetrically disposed on either side of the through-hole 20, each containing a bearing. The main shaft 18 is rotatably disposed within the bearing. An annular groove is formed on the main shaft 18, within which a baffle 3 is disposed. The baffle 3 abuts against the end of the bearing seat 8 away from the threaded sleeve. The bearing comprises an outer ring 7 and an inner ring 6. The outer ring 7 is disposed within the through hole. Two compression sleeves 19 are symmetrically positioned within the outer ring 7 to limit the inner ring 6 and prevent it from moving on the bearing. The inner ring 6 is relatively fixed to the wear ring 5 and rotates together during rotation. The inner ring 6 is rotatably positioned between the two compression sleeves 19. The wear ring 5 is sleeved on the main shaft 18, and the inner ring 6 is sleeved on the wear ring 5. The wear ring 5 is fixed to the main shaft 18. During rotation, the wear ring 5 wears away instead of the main shaft 18. If the wear ring 5 becomes loose, it only needs to be replaced, thereby reducing maintenance costs. The size of the perforation 20 can be adjusted according to flow requirements. The baffle 3 and gasket 9 work together to form a relatively sealed space within the bearing to prevent the conveyed material from entering and corroding it. At the same time, there is an annular space in the through hole that is adapted to the bearing outer ring 7. A retaining ring 4 is provided at the left and right ends of the annular space respectively. The bearing outer ring 7 is fixed between the two retaining rings 4. The retaining ring 4 can adjust the width as needed to limit the bearing outer ring 7, and at the same time further block the possibility of the transported object entering the bearing. In addition, the retaining ring 4, the washer 9 and the clamping nut 12 work together to make the position of the main shaft 18 relatively fixed on the bearing to prevent it from shaking in the lateral direction.

[0022] like Figure 1As shown, one end of the bearing seat 8 is fixedly connected to the inner shell 13 by a pin 17, and a cavity with a size suitable for the threaded sleeve is provided inside the inner shell 13. The other end of the bearing seat 8 is sleeved with a joint 1, and a sealing ring 15 for sealing is provided between the bearing seat 8 and the joint 1. An outer shell 14 for protection is provided outside the joint 1, the bearing seat 8 and the inner shell 13; one end of the joint 1 is sleeved with the outer shell 14, and the other end is connected to the delivery pipeline, and a sealing ring 2 for sealing is provided at the connection between the two ends of the joint 1.

[0023] Working principle: respectively sleeve the right-handed threaded sleeve 10 and the left-handed threaded sleeve 11 on the two main shafts 18, then place the two main shafts 18 on the same bearing, make the right-handed threaded sleeve 10 and the left-handed threaded sleeve 11 engage and then put them into the chamber inside the inner shell 13, then place the two main shafts 18 on the same bearing at the other end, fix the two bearing seats 8 on the inner shell 13, then sleeve the joint on the bearing seat 8, sleeve the outer shell 14 on the bearing seat 8 and the inner shell 13, and respectively connect the joints at both ends to the input pipeline and the output pipeline. Driven by the motor (set at both ends of the main shaft 18 as needed), the conveyed material is driven from the input pipeline through the pump body (this device) into the output pipeline through the rotation of the right-handed threaded sleeve 10 and the left-handed threaded sleeve 11.

[0024] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various deformations, modifications, and substitutions of the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A twin-screw pump for pipeline transportation, characterized by: The invention comprises two parallel main shafts (18), bearing components are symmetrically provided at both ends of the main shaft (18), a threaded sleeve is sleeved on the main shaft (18), and the threaded sleeve comprises a right-handed threaded sleeve (10) and a left-handed threaded sleeve (11) with opposite thread directions, wherein one main shaft (18) is sleeved on the right-handed threaded sleeve (10), and the other main shaft (18) is sleeved on the left-handed threaded sleeve (11), the right-handed threaded sleeve (10) and the left-handed threaded sleeve (11) are meshed, and an adaptive pipeline component is arranged outside the bearing component, the right-handed threaded sleeve (10) and the left-handed threaded sleeve (11); the conveyed object is passed into one end of the rotating main shaft (18), and is conveyed to the other end of the main shaft (18) through the meshed right-handed threaded sleeve (10) and the left-handed threaded sleeve (11); The bearing component comprises a bearing seat (8), the center of the bearing seat (8) is provided with a through hole (20) for the conveyed fluid to flow through, two through holes are symmetrically provided on both sides of the through hole (20), bearings are provided in the two through holes, and the main shaft (18) is rotatably provided in the bearing; A limiting strip (16) is provided in the middle of the main shaft (18) along the length direction, and a strip groove adapted to the limiting strip (16) is provided on the inner wall of the threaded sleeve, and the strip groove and the limiting strip (16) are slidably connected; a threaded portion is provided at one end of the upper limiting strip (16) of the main shaft (18), and a gasket (9) is provided at the other end, the threaded portion is threadedly connected to the clamping nut (12), the gasket (9) and the clamping nut (12) are connected to the threaded sleeve, and the end of the gasket (9) away from the threaded sleeve abuts against the bearing component; The bearing comprises a bearing outer ring (7) and a bearing inner ring (6), the bearing outer ring (7) is arranged in the through hole, two compression sleeves (19) are arranged in the bearing outer ring (7), the bearing inner ring (6) is rotatably arranged between the two compression sleeves (19), a wear ring (5) is sleeved on the main shaft (18), and the bearing inner ring (6) is outer-mounted on the wear ring (5); One end of the bearing seat (8) is fixedly connected to the inner shell (13) through a pin shaft (17), and a cavity with a size suitable for the threaded sleeve is provided inside the inner shell (13). The other end of the bearing seat (8) is provided with a joint (1), and a sealing ring (15) for sealing is provided between the bearing seat (8) and the joint (1). An outer shell (14) for protection is provided outside the joint (1), the bearing seat (8) and the inner shell (13); one end of the joint (1) is provided with the outer shell (14), and the other end is connected to the conveying pipeline. A sealing ring (2) for sealing is provided at the connection between the two ends of the joint (1).

2. A twin-screw pump for pipeline transportation according to claim 1, characterized in that: An annular groove is provided on the main shaft (18), a baffle (3) is provided in the annular groove, and the baffle (3) abuts against one end of the bearing seat (8) away from the threaded sleeve.

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