Self-centering vibration-damping anti-shaking device of vertical single-screw pump

Abstract

The utility model discloses a self-centering vibration-damping anti-shaking device for a vertical single-screw pump. The self-centering vibration-damping anti-shaking device comprises a guide ring and a hollow guide sliding sleeve, the guide sliding sleeve comprises a variable-diameter guide sliding sleeve and a straight-section guide sliding sleeve which are arranged in the first direction, the variable-diameter guide sliding sleeve comprises a first end and a second end which are arranged away from each other in the first direction, the second end is connected with the straight-section guide sliding sleeve, and the variable-diameter guide sliding sleeve is connected with the straight-section guide sliding sleeve in the direction from the first end to the second end. The inner diameter of the variable-diameter guide sliding sleeve is gradually reduced; the guide ring is located in the straight section guide sliding sleeve, a plurality of guide claws are arranged on the periphery of the guide ring, and claw tips of the guide claws are arranged away from the variable-diameter guide sliding sleeve and obliquely extend towards the center of the guide ring. The pump hoisting efficiency can be improved, the diffusion time of gas separated out during hoisting of the pump and the time for operators to make contact with poisonous and harmful gas are shortened, the operation safety risk is reduced, meanwhile, the pump is fixed, and damage to the pump due to vibration or shaking in the operation process is prevented.

Description

Technical Field

[0001] The present application belongs to the technical field of vertical pump installation, and specifically relates to a self-centering vibration reduction and anti-sway device for a vertical single-screw pump. Background Art

[0002] Oil and gas processing plants are equipped with buried waste oil collection tanks. Oil and gas discharged during maintenance and overhaul at various waste discharge points within the plant are collected by gravity flow through buried pipelines into these tanks. The collection tanks are typically equipped with vertical single-screw pumps, which regularly pump the waste oil from the tanks to unqualified oil tanks or to the plant inlet pipeline for mixing with incoming crude oil before reprocessing.

[0003] The vertical single-screw pump is suspended from the top of the collection tank, with the pump head located at the bottom of the vertical single-screw pump. The distance from the top discharge outlet is the entire height of the vertical single-screw pump, which can amplify vibration transmission. Therefore, an anti-vibration fixture must be installed in the collection tank to secure the pump head. The vertical single-screw pump needs to be periodically removed for maintenance. When the vertical single-screw pump is reinstalled into the collection tank, the pump head needs to be re-secured to the anti-vibration fixture. Because the waste oil stored in the collection tank releases volatile hydrocarbons and associated gas containing toxic hydrogen sulfide, among other harmful substances, operators are unable to enter the collection tank for assistance. Therefore, a centering and deviation correction device must be added to the anti-vibration fixture to ensure installation accuracy without manual assistance.

[0004] The existing centering and correction device is only suitable for conventional vertical single-screw pumps of about 2 meters. The higher the height of the vertical single-screw pump, the greater the pump head offset will be for each certain angle of deviation. When reinstalling an ultra-high vertical single-screw pump, it is impossible to quickly center and position it. The installation takes a long time, and the installers are exposed to the toxic and flammable gas volatilized from the tank mouth for a long time, which poses a great safety hazard. Utility Model Content

[0005] The present application aims to provide a self-centering vibration reduction and anti-sway device for a vertical single-screw pump, so as to solve the problem that the existing centering device cannot meet the installation requirements of an ultra-high vertical pump.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] The embodiment of the present application provides a self-centering vibration reduction and anti-swaying device for a vertical single-screw pump, comprising: a guide ring and a hollow guide sleeve;

[0008] The guide sleeve includes a variable-diameter guide sleeve and a straight-section guide sleeve arranged along a first direction. The variable-diameter guide sleeve includes a first end and a second end arranged in opposite directions along the first direction. The second end is connected to the straight-section guide sleeve. The inner diameter of the variable-diameter guide sleeve decreases gradually from the first end to the second end.

[0009] The guide ring is located in the straight guide sleeve. A plurality of guide claws are provided on the outer periphery of the guide ring. The claw tips of the guide claws are arranged away from the variable diameter guide sleeve and extend obliquely toward the center of the guide ring.

[0010] Optionally, the guide ring further comprises a plurality of wing plates protruding from the outer periphery of the guide ring, the wing plates having a third end and a fourth end arranged away from each other along the first direction, the third end being close to the variable diameter guide sleeve, and one of the guide claws being connected to the fourth end of one of the wing plates.

[0011] Optionally, the diameter of the outer base circle of the wing plate is smaller than the inner diameter of the straight guide sleeve.

[0012] Optionally, the cross-sectional area of the wing plate decreases along the direction from the third end to the fourth end.

[0013] Optionally, the diameter of the outer base circle of the third end of the wing plate is 0-4 mm smaller than the inner diameter of the straight guide sleeve, and the diameter of the outer base circle of the fourth end of the wing plate is equal to the diameter of the outer base circle of the guide claw.

[0014] Optionally, the device further comprises a fastener, wherein the fastener passes through the guide claw and the guide ring respectively to connect the guide claw to the guide ring.

[0015] Optionally, the guide ring is made of elastic material, and the guide claw is made of metal material.

[0016] Optionally, the transition section between the variable diameter guide sleeve and the straight section guide sleeve is an arc surface.

[0017] Optionally, the included angle between the sleeve wall of the variable diameter guide sleeve and the axis is 15° to 30°.

[0018] Optionally, a fixing flange is provided on the outer wall of the guide sleeve for connecting the guide sleeve to a target device.

[0019] In an embodiment of the present application, in response to the deficiencies of the existing technical solutions, a device for quickly centering and fixing a vertical single-screw pump is provided. The guide ring is installed on the pump head of the vertical single-screw pump, and the guide sleeve is set at the bottom of the oil and gas collection tank. When hoisting the vertical single-screw pump, the angle of the vertical single-screw pump is adjusted so that the tip of the guide claw can contact the inner wall of the first end of the variable-diameter guide sleeve. The hoist is lowered. Under the action of gravity, the guide claw contacts the variable-diameter guide sleeve, guiding the vertical single-screw pump equipped with the guide ring to slide toward the center. The guide ring falls to the upper mouth of the straight guide sleeve, meeting the centering requirement. At this time, the hoist is continued to be slowly lowered. Under the action of gravity, the guide ring slowly and completely squeezes into the straight guide sleeve and slides to the centering position, which fixes the pump end and prevents shaking during pump operation. It can improve the hoisting efficiency of ultra-high vertical single-screw pumps, reduce the diffusion time of gas released from the pump during hoisting and the time when operators are exposed to toxic and harmful gases, reduce operational safety risks, and at the same time fix the pump to prevent damage to the pump due to vibration or shaking during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 Schematic diagram of a self-centering vibration reduction and anti-sway device for a vertical single-screw pump according to an embodiment of the present application;

[0022] Figure 2 is a top view of a guide ring according to an embodiment of the present application;

[0023] Figure 3 is a front view of a guide ring according to an embodiment of the present application;

[0024] Figure 4 is a top view of a guide claw according to an embodiment of the present application;

[0025] Figure 5 This is a front view of the guide claw according to an embodiment of the present application.

[0026] Figure numerals: 1: guide sleeve; 11: reducing guide sleeve; 12: straight guide sleeve; 2: guide ring; 21: guide ring body; 22: guide claw; 23: wing plate; 3: fastener; 4: pump head; 5: fixing flange; 6: bracket angle steel. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0029] Existing vertical screw pump guides consist of only a straight section of pipe. The clearance between the guide and the guide ring is only 1 to 2.5 mm, reducing the correction margin to approximately 10 mm per side. This results in poor centering and requires high lifting precision. When hoisting ultra-high vertical screw pumps, the pumps are typically 5 to 6 meters long. During hoisting, the pump axis tilts by 1°, resulting in an offset of 110 mm, far exceeding the correction range of existing guides. Due to the large deflection of the pump head, quick alignment using existing guides is difficult, hoisting is time-consuming, and the guide ring can be damaged, widening the gap between the guide ring and the guide, leading to pump wobbling. Furthermore, in the petrochemical industry, vertical screw pumps primarily transport media that are prone to releasing hydrogen sulfide and flammable gases. During installation and replacement of vertical screw pumps, the volatilization and release of residual toxic gases are unavoidable. Installers are exposed to the toxic gases released from the tank for extended periods, posing a risk of poisoning. Measures must be taken to address these issues and ensure safe and stable production.

[0030] The purpose of this utility model is to address the deficiencies of the existing technical solutions and to provide a self-centering vibration-damping and anti-swaying device for a vertical single-screw pump, so as to improve the efficiency of pump assembly and hoisting, reduce the diffusion time of gas released by the pump during hoisting and the time when operators are exposed to toxic and harmful gases, reduce operational safety risks, and at the same time fix the pump to prevent damage to the pump due to shaking or impact during operation.

[0031] This embodiment provides a self-centering vibration reduction and anti-swaying device for a vertical single screw pump, see the attached Figure 1, including: a guide ring 2 and a hollow guide sleeve 1; the guide sleeve 1 includes a variable diameter guide sleeve 11 and a straight section guide sleeve 12 arranged along a first direction, the variable diameter guide sleeve 11 includes a first end and a second end arranged away from each other along the first direction, the second end is connected to the straight section guide sleeve 12, and the inner diameter of the variable diameter guide sleeve 11 decreases along the direction from the first end to the second end; the guide ring 2 is located in the straight section guide sleeve 12, and a plurality of guide claws 22 are provided on the outer periphery of the guide ring 2, and the claw tips of the guide claws 22 are arranged away from the variable diameter guide sleeve 11 and extend obliquely toward the center of the guide ring 2.

[0032] The guide sleeve 1 is fixed to the bottom of the oil and gas collection tank and is used to fix the pump head 4 of the vertical single-screw pump to prevent shaking. The guide sleeve 1 consists of a variable diameter guide sleeve 11 and a straight guide sleeve 12. The first end diameter of the variable diameter guide sleeve 11 is larger than the second end, and the second end is connected to the inlet of the straight guide sleeve 12. Its function is to expand the inlet diameter of the straight guide sleeve 12, guiding the vertical single-screw pump to slide into the straight guide sleeve 12 when there is a deviation in the lifting. Even when the pump head 4 is significantly offset, it can also be easily sent into the guide sleeve 1. According to the relevant dimensions of the oil and gas collection tank (manhole for inspection, installation hole for the pump, etc.), the diameter of the first end of the variable diameter sleeve is maximized while ensuring that the guide sleeve 1 can be placed in the tank as a whole. The straight guide sleeve 12 is a straight pipe section, the size of which is determined by the specifications of the pump. Its main function is to cooperate with the guide ring 2 to position and fix the lower end of the pump to prevent the pump from shaking.

[0033] The guide ring 2 is mounted on the pump head 4, guiding the vertical single-screw pump into the guide sleeve 1 and providing cushioning and protection for the pump head 4. The pump head 4 is provided with a fixing flange 5, to which the guide ring 2 is mounted. Its inner diameter is equal to the pump housing diameter, and its outer diameter is equal to the outer diameter of the fixing flange 5. Made of an elastic material such as tetrafluoroethylene, the guide ring 2 wraps around the pump head 4, providing a protective cushioning effect and preventing collision between the pump and the inner wall of the guide sleeve 1. The guide ring 2 is also equipped with guide claws 22, which extend downward and are tilted at the same angle, pointing to a point on the central axis of the guide ring 2. The guide claws 22 enhance the corrective force. The downward extension of the guide claws 22 is determined by the space below the vertical single-screw pump. The longer the downward extension, the smaller the outer base diameter of the lower claw tip, and the stronger the corrective force. The specific dimensions of the guide ring 2 and the guide claw 22 can be adjusted accordingly according to the caliber of the vertical single-screw pump.

[0034] When hoisting a vertical single-screw pump, insert the vertical single-screw pump, equipped with guide ring 2, into the waste oil collection tank and gradually lower it to the bottom of the tank. Adjust the tips of guide claws 22 so that they contact the inner wall of the large-diameter end of the reducer guide sleeve 11. As the hoist gradually descends, under the action of gravity, guide claws 22 and reducer guide sleeve 11 guide guide ring 2 and the pump head 4 within guide ring 2 toward the center of guide sleeve 1 until the guide ring 2 falls to the upper end of the straight guide sleeve 12, achieving the required centering. At this point, continue to slowly lower the hoist. Under the action of gravity, guide ring 2 slowly and completely squeezes into the straight guide sleeve 12 and slides to the installation position of the vertical single-screw pump, securing the pump head 4 in the straight guide sleeve 12. After the pump head 4 is centered and secured, secure the top of the vertical single-screw pump and close the mounting hole at the top of the waste oil collection tank, completing the installation of the vertical single-screw pump. The utility model adds a variable-diameter guide sleeve 11 on the basis of the original straight-section guide sleeve 12, increases the correction range by enlarging the diameter of the guide sleeve 1, solves the vibration and shaking problems of the ultra-high vertical single-screw pump, and at the same time solves the problem that after the pump is maintained and overhauled, personnel can no longer enter the tank to assist in the installation when reinstalling it, reduces the diffusion time of the precipitated gas and the time when the operators are exposed to toxic and harmful gases, and reduces the safety risks of the operation.

[0035] In addition, in some optional embodiments, as shown in the attached Figure 2 and 3 As shown, the guide ring 2 also includes a plurality of wing plates 23 protruding from the periphery of the guide ring 2. The wing plates 23 have a third end and a fourth end arranged away from each other along the first direction. The third end is close to the variable diameter guide sleeve 11. A guide claw 22 is connected to the fourth end of a wing plate 23.

[0036] The wing plates 23 protrude from the guide ring body 21. The outer base diameter of the wing plates 23 is machined at a 1:1 ratio to the inner diameter of the straight guide sleeve 12. The wing plates 23 correspond one-to-one with the guide claws 22. Each wing plate 23 is connected to a guide claw 22 at its fourth end, which extends downward from the fourth end of the wing plate 23. Because the outer diameter of the guide ring body 21 is equal to the outer diameter of the fixing flange 5 on the vertical single-screw pump, the wing plates 23 also protrude from the fixing flange 5. During the installation of the pump head 4 of the vertical single-screw pump into the guide sleeve 1, the wing plates 23 protect the metal pump body from contact and collision with the guide sleeve 1, preventing vibration caused by such collisions.

[0037] Specifically, the wing plates 23 and the guide claws 22 can be arranged diagonally in even numbers such as 4, 6, or 8 according to the size of the pump.

[0038] In addition, in some optional embodiments, the diameter of the outer base circle of the wing plate 23 is smaller than the inner diameter of the straight guide sleeve 12 .

[0039] The outer diameter of the wing plate 23 is determined by the inner diameter of the straight section guide sleeve 12. A certain gap is retained between the wing plate 23 and the inner wall of the straight section guide sleeve 12, which can facilitate the vertical single-screw pump to enter the straight section guide sleeve 12 and play a role in fixing and preventing shaking.

[0040] In addition, in some optional embodiments, the cross-sectional area of the wing panel 23 decreases along the direction from the third end to the fourth end.

[0041] The portion of the wing plate 23 near the third end is straight, while the portion near the fourth end is chamfered to provide a corrective guide function. The chamfer extends to the guide claw 22, where it smoothly connects. The guide claw 22 is shaped like a long metal strip extending downward along the lower chamfer of the wing plate 23. After the vertical single-screw pump is hoisted into the straight guide sleeve 12, the straight portion of the wing plate 23 near the third end contacts the inner wall of the guide sleeve 1. The guide claw 22 does not directly contact the guide sleeve 1, preventing the sharp edge of the guide claw 22 from colliding with the inner wall of the guide sleeve 1.

[0042] Furthermore, when hoisting the vertical single-screw pump, as the hoist gradually descends, under the action of gravity, the guide claw 22 contacts the variable-diameter guide sleeve 11 to guide the guide ring 2 and the vertical single-screw pump to slide toward the center until the lower chamfer of the guide ring 2 wing plate 23 reaches the upper mouth of the straight guide sleeve 12, meeting the centering requirement. At this time, continue to slowly lower the hoist. Under the action of gravity, the wing plate 23 of the guide ring 2 slowly and completely squeezes into the straight guide sleeve 12 and slides to the installation position of the vertical single-screw pump, hoisting the centering position, and because the wing plate 23 of the guide ring 2 and the inner wall of the straight guide sleeve 12 are 1:1 matched, they play a fixing role on the pump end to prevent shaking during pump operation.

[0043] In addition, in some optional embodiments, the diameter of the outer base circle of the third end of the wing plate 23 is 0 to 4 mm smaller than the inner diameter of the straight guide sleeve 12 , and the diameter of the outer base circle of the fourth end of the wing plate 23 is equal to the diameter of the outer base circle of the guide claw 22 .

[0044] The outer diameter of the wing plate 23 is determined by the inner diameter of the straight guide sleeve 12. A certain clearance is maintained between the wing plate 23 and the inner wall of the straight guide sleeve 12, facilitating the vertical single-screw pump's entry into the straight guide sleeve 12 while also securing it against sway. For the 5-meter-long vertical single-screw pump used in this embodiment, a 2-mm clearance on each side between the straight guide sleeve 12 and the wing plate 23 is ideal. For vertical pumps of different lengths and diameters, varying clearances between the straight guide sleeve 12 and the pump body can be maintained accordingly.

[0045] In addition, in some optional embodiments, a fastener 3 is further included, and the fastener 3 passes through the guide claw 22 and the guide ring 2 respectively to connect the guide claw 22 to the guide ring 2.

[0046] As attached Figure 4 and 5 As shown, in this embodiment, the guide claw 22 is a bent steel plate or is formed by welding two steel plates at a certain angle. The guide claw 22 includes a first plate surface and a second plate surface. The first plate surface is arranged in close proximity to the fourth end of the corresponding wing plate 23, and the second plate surface extends from the chamfer of the wing plate 23 and points to a point on the central axis of the guide ring 2. The angle between the first plate surface and the second plate surface is consistent with the chamfer of the wing plate 23, which serves as a guide to correct deviation. Upper and lower through holes are machined in the corresponding positions of each wing plate 23 of the guide ring 2 and on the first plate surface of the guide claw 2, so that the guide ring 2 can be fixed to the fixing flange 5 of the vertical single-screw pump using fasteners 3 including bolts, thereby connecting the guide ring 2 and the vertical single-screw pump into a whole.

[0047] In addition, in some optional embodiments, the guide ring 2 is made of elastic material, and the guide claw 22 is made of metal material.

[0048] The guide ring 2 can be made of plastic elastic materials such as polytetrafluoroethylene, and is shaped like a ring with wing plates 23 protruding around the four sides. The guide claws 22 are made of metal.

[0049] In addition, in some optional embodiments, the transition section between the variable diameter guide sleeve 11 and the straight section guide sleeve 12 is an arc surface.

[0050] The inner wall of the connection between the reducing guide sleeve 11 and the straight guide sleeve 12 should be smooth and flat to facilitate the smooth sliding of the guide ring 2 and prevent the protruding parts on the inner wall from colliding with the vertical single screw pump and causing vibration of the vertical single screw pump.

[0051] In addition, in some optional embodiments, the included angle between the sleeve wall of the variable diameter guide sleeve 11 and the axis is 15° to 30°.

[0052] The included angle between the reducing guide sleeve 11 and the axis is 15° to 30°, and the corresponding included angle between the reducing guide sleeve 11 and the plane of the equipment on which the reducing guide sleeve 11 is installed is 60° to 75°.

[0053] Furthermore, in some embodiments, the angle of the chamfer below the wing plate 23 and the guide claw 22 is 60°, which matches the angle of the equipment plane of the variable diameter guide sleeve 11. When the vertical single-screw pump enters the guide sleeve 1, the guide ring 2 can slide smoothly along the inner wall of the variable diameter guide sleeve 11.

[0054] In addition, in some optional embodiments, a fixing flange 5 is provided on the outer wall of the guide sleeve 1 for connecting the guide sleeve 1 to the target device.

[0055] The guide sleeve 1's fixing flange 5 is connected to the target device via fasteners 3. Specifically, in this embodiment, the target device is a waste oil collection tank with a protruding liquid collection bag at the bottom, into which a vertical single-screw pump extends. A bracket angle 6 is secured within the oil collection tank's liquid collection bag, and the guide sleeve 1's fixing flange 5 is connected to the bracket angle 6 via fasteners. U-bolt holes are provided in the bracket angle to facilitate alignment of the guide sleeve 1's fixing flange 5 during initial installation.

[0056] The present invention provides a device for quickly aligning and securing a vertical single-screw pump during hoisting. A guide ring is mounted on the pump head of the vertical single-screw pump, and a guide sleeve is disposed at the bottom of an oil and gas collection tank. When hoisting the vertical single-screw pump, the angle of the pump is adjusted so that the tips of the guide claws contact the inner wall of the first end of the variable-diameter guide sleeve. The hoist is then lowered. Under the action of gravity, the guide claws contact the variable-diameter guide sleeve, guiding the vertical single-screw pump, equipped with the guide ring, toward the center. The guide ring then falls onto the upper end of the straight guide sleeve, achieving centering. The hoist is then slowly lowered. Under the action of gravity, the guide ring gradually and completely squeezes into the straight guide sleeve and slides to the centered position, securing the pump end and preventing vibration during operation. This device improves pump hoisting efficiency, reduces the diffusion time of generated gas during hoisting, and reduces the operator's exposure to toxic and harmful gases, thereby reducing operational safety risks. Furthermore, the device secures the pump and prevents damage from vibration or shaking during operation.

[0057] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0058] Although alternative embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including alternative embodiments and all changes and modifications that fall within the scope of the present invention.

[0059] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity from another, and do not necessarily require or imply any actual relationship or order between these entities. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that an article or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the article or terminal device comprising the element.

[0060] The above is a detailed introduction to the technical solution provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. At the same time, for those skilled in the art, according to the principles and implementation methods of the present application, there may be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A self-centering vibration reduction and anti-sway device for a vertical single-screw pump, characterized in that: include: Guide ring and hollow guide sleeve; The guide sleeve includes a variable-diameter guide sleeve and a straight-section guide sleeve arranged along a first direction. The variable-diameter guide sleeve includes a first end and a second end arranged in opposite directions along the first direction. The second end is connected to the straight-section guide sleeve. The inner diameter of the variable-diameter guide sleeve decreases gradually from the first end to the second end. The guide ring is located in the straight guide sleeve. A plurality of guide claws are provided on the outer periphery of the guide ring. The claw tips of the guide claws are arranged away from the variable diameter guide sleeve and extend obliquely toward the center of the guide ring.

2. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 1 is characterized in that: The guide ring also includes a plurality of wing plates protruding from the outer periphery of the guide ring, the wing plates having a third end and a fourth end arranged away from each other along the first direction, the third end being close to the variable diameter guide sleeve, and one of the guide claws being connected to the fourth end of one of the wing plates.

3. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 2 is characterized in that: The diameter of the outer base circle of the wing plate is smaller than the inner diameter of the straight guide sleeve.

4. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 3 is characterized in that: The cross-sectional area of the wing plate decreases along a direction from the third end to the fourth end.

5. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 4 is characterized in that: The diameter of the outer base circle of the third end of the wing plate is 0-4 mm smaller than the inner diameter of the straight guide sleeve, and the diameter of the outer base circle of the fourth end of the wing plate is equal to the diameter of the outer base circle of the guide claw.

6. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 1, characterized in that: The device further includes a fastener passing through the guide claw and the guide ring respectively to connect the guide claw to the guide ring.

7. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 1 is characterized in that: The guide ring is made of elastic material, and the guide claw is made of metal material.

8. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 1 is characterized in that: The transition section between the diameter-changing guide sleeve and the straight section guide sleeve is an arc surface.

9. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 1, characterized in that: The included angle between the sleeve wall of the variable diameter guide sleeve and the axis is 15° to 30°.

10. The self-centering vibration reduction and anti-swaying device for a vertical single-screw pump according to claim 1, characterized in that: A fixing flange is provided on the outer wall of the guide sleeve for connecting the guide sleeve to a target device.

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