Hoisting type semi-suspension centrifugal pump

Abstract

The utility model discloses a hoisting type semi-suspension centrifugal pump which comprises a pump body, a suction section and a driving motor, and is characterized by further comprising a stabilizing mechanism, the stabilizing mechanism comprises a top plate and a bottom plate, the top plate is connected with the bottom plate through a supporting column, a traction assembly is arranged below the top plate, and the bottom plate is connected with the traction assembly. A shaking restraining assembly is arranged in the middle of the bottom plate, the upper portion of the pump body is connected with the traction assembly, and the lower portion of the pump body is fixedly connected with the shaking restraining assembly. Dead weight of a centrifugal pump and dynamic load during operation may cause concentrated stress on a foundation or a supporting structure, and the foundation is easy to crack or equipment is easy to incline for a long time. The traction rope can relieve local pressure by sharing part of load, the problem of unstable equipment operation caused by damage of the supporting structure is avoided, the replacement period of quick-wear parts such as a bearing and a sealing piece can be prolonged by reducing vibration and displacement and designing the traction rope, and meanwhile the probability of accidental shutdown caused by equipment failures is reduced.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pumps, and in particular to a suspended semi-suspended centrifugal pump. Background Technology

[0002] Centrifugal pumps are common fluid machinery devices mainly used for conveying liquids, liquid-solid mixtures, or liquid-gas mixtures. A centrifugal pump typically consists of a pump body, impeller, shaft, bearings, and sealing devices. It operates by using a motor to drive the impeller to rotate, causing the water to undergo centrifugal motion. After centrifugal motion, the water is thrown towards the outer edge of the impeller and flows through the flow channel of the volute casing into the pump's discharge pipe, thus achieving the functions of conveying and pressurizing. Centrifugal pumps are widely used in industry, agriculture, construction, water supply, drainage, air conditioning, chemical, petroleum, and energy fields.

[0003] Existing centrifugal pumps often suffer from unstable foundations during operation, leading to loosening and vibration. This vibration generates noise and shortens the pump's lifespan. The pump's weight and dynamic loads during operation can cause concentrated stress on the foundation or supporting structure, potentially resulting in foundation cracking or equipment tilting over time. Current vibration-damping centrifugal pumps require multi-stage vibration reduction to decrease mechanical fatigue and component wear caused by vibration, thereby extending the equipment's lifespan. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a suspended semi-suspended centrifugal pump.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a suspended semi-suspended centrifugal pump, comprising a pump body, a suction section, and a drive motor. Its distinguishing feature is that it further includes a stabilizing mechanism, which comprises a top plate and a bottom plate connected by a support column. A traction assembly is disposed below the top plate, and a sway suppression assembly is disposed in the middle of the bottom plate. The pump body is connected to the traction assembly at its top and to the sway suppression assembly at its bottom.

[0007] As a preferred technical solution of this utility model, the traction assembly includes a base, a first fixing ring, a first locking hook, a traction rope, and a second locking hook. The base is disposed below the top plate, the first fixing ring is fixed on the base, the first locking hook is connected to the first fixing ring, one end of the traction rope is fixedly connected to the first locking hook, and the other end is fixedly connected to the second locking hook.

[0008] As a preferred embodiment of this utility model, two second fixing rings are fixedly installed on the outer side of the suction section, and two second fixing rings are also fixedly installed on the outer side of the drive motor. The installation positions of the four second fixing rings are rectangularly distributed on the plane.

[0009] In a preferred embodiment of this invention, the second fixing ring is connected to the second locking hook.

[0010] As a preferred technical solution of this utility model, a groove is provided in the middle of the base plate, and a sway suppression component is installed inside the groove. The sway suppression component includes a contact plate, a first telescopic column, a second telescopic column, and a spring. The upper part of the contact plate is fixedly connected to the bottom of the pump body, and the lower part is fixedly connected to the first telescopic column. The second telescopic column is sleeved on the first telescopic column and fixedly connected to the bottom of the groove. The spring is sleeved around the first telescopic column and the second telescopic column, and the upper and lower ends of the spring abut against the contact plate and the bottom of the groove.

[0011] As a preferred technical solution of this utility model, four traction components are provided, which are rectangularly arranged at the four lower corners of the top plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. Distribute load and prevent structural overload: The self-weight of the centrifugal pump and the dynamic load during operation may cause concentrated stress on the foundation or supporting structure, which can easily lead to foundation cracking or equipment tilting in the long run. The tie rope can relieve local pressure by distributing part of the load and avoid equipment instability caused by damage to the supporting structure;

[0014] 2. Reduce vibration damage to equipment: Centrifugal pumps are prone to vibration due to high-speed impeller rotation and fluid impact during operation. Long-term vibration can lead to accelerated wear of key components such as bearings and seals, and may even cause pump body displacement or loosening of pipe joints. The fixing effect of the pull rope can effectively suppress the vibration amplitude, reduce mechanical fatigue and component wear caused by vibration, and thus extend the service life of the equipment.

[0015] 3. By reducing vibration and displacement, the pull rope design can extend the replacement cycle of vulnerable parts such as bearings and seals, while reducing the probability of unexpected downtime due to equipment failure. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a first partial structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the second partial structure of this utility model;

[0020] Figure 4 This is a partial cross-sectional structural schematic diagram of the present invention;

[0021] In the diagram: 1. Pump body; 2. Suction section; 3. Drive motor; 4. Stabilizing mechanism; 5. Top plate; 6. Bottom plate; 7. Support column; 8. Pulling assembly; 81. Base; 82. First fixing ring; 83. First locking hook; 84. Pulling rope; 85. Second locking hook; 9. Sway suppression assembly; 91. Contact plate; 92. First telescopic column; 93. Second telescopic column; 94. Spring; 10. Second fixing ring; 11. Groove. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0023] In the attached diagram, all identical reference numerals refer to the same components.

[0024] like Figure 1-4 As shown, this utility model provides a suspended semi-suspended centrifugal pump, including a pump body 1, a suction section 2, and a drive motor 3. Its characteristic feature is that it also includes a stabilizing mechanism 4, which includes a top plate 5 and a bottom plate 6. The top plate 5 and the bottom plate 6 are connected by a support column 7. A traction assembly 8 is provided below the top plate 5, and a sway suppression assembly 9 is provided in the middle of the bottom plate 6. The pump body 1 is connected to the traction assembly 8 at the top and to the sway suppression assembly 9 at the bottom.

[0025] In this invention, the top plate 5 and the bottom plate 6 are welded and fixed together by four vertical steel support columns 7 to form a rigid frame. Four traction components 8 are symmetrically installed below the top plate 5, and each traction component 8 is connected to the second fixing ring 10 above the pump body 1 by a high-strength alloy steel traction rope 84. The bottom of the pump body 1 is bolted to the contact plate 91 of the sway suppression component 9 by a flange, and the sway suppression component 9 is embedded in the groove 11 in the middle of the bottom plate 6. The pump body 1 is suspended below the top plate 5 by the traction rope 84, and the bottom is provided with elastic support by the sway suppression component 9, forming a semi-suspended structure. During operation, the axial vibration of the pump body 1 is absorbed by the spring 94, and the radial vibration is constrained by the tension of the traction rope 84. The rigid connection between the support columns 7 and the bottom plate 6 ensures the overall frame's anti-overturning ability, making it suitable for environments prone to swaying, such as offshore platforms.

[0026] In an optional embodiment, the traction assembly 8 includes a base 81, a first fixing ring 82, a first locking hook 83, a traction rope 84, and a second locking hook 85. The base 81 is disposed below the top plate 5. The first fixing ring 82 is fixed on the base 81. The first locking hook 83 is connected to the first fixing ring 82. One end of the traction rope 84 is fixedly connected to the first locking hook 83, and the other end is fixedly connected to the second locking hook 85.

[0027] It should be noted that the pull rope 84 is made of 304 stainless steel wire rope with a diameter of 10mm. One end of the rope is connected to the first locking hook 83 through a crimp sleeve, and the other end is connected to the second fixing ring 10 of the pump body 1 through a second locking hook 85. The length of the pull rope 84 can be finely adjusted by a threaded adjuster to ensure that the pump body 1 is horizontally aligned. During installation, the pump body 1 is first hoisted to the preset height by a crane, and then the four pull ropes 84 are connected in sequence. By pulling at multiple points, the load on the pump body 1 is distributed, avoiding stress concentration at a single point, while allowing slight displacement of the pump body 1 during thermal expansion and contraction.

[0028] In an optional embodiment, two second fixing rings 10 are fixedly installed on the outer side of the inhalation section 2, and two second fixing rings 10 are also fixedly installed on the outer side of the drive motor 3. The installation positions of the four second fixing rings 10 are rectangularly distributed on the plane.

[0029] It should be noted that two second fixing rings 10 are welded to the outside of the suction section 2 and the drive motor 3 respectively. The second fixing ring 10 is a U-shaped ring with an inner diameter of 50mm. It is made of Q235B steel and galvanized for corrosion protection. The rectangular layout makes the tension of the traction rope 84 evenly distributed, avoiding the pump body 1 from deflection due to torque. The rectangular traction layout can effectively resist the torsional vibration of the pump body 1 caused by the impact of the pipeline medium.

[0030] In an optional embodiment, the second retaining ring 10 is hooked to the second locking hook 85.

[0031] It should be noted that the hook connection makes it easy to disassemble the traction rope, replace the traction rope, and connect the hanger.

[0032] In an optional embodiment, a groove 11 is provided in the middle of the base plate 6, and a sway suppression component 9 is installed inside the groove 11. The sway suppression component 9 includes a contact plate 91, a first telescopic column 92, a second telescopic column 93, and a spring 94. The upper part of the contact plate 91 is fixedly connected to the bottom of the pump body 1, and the lower part is fixedly connected to the first telescopic column 92. The second telescopic column 93 is sleeved on the first telescopic column 92 and fixedly connected to the bottom of the groove 11. The spring 94 is sleeved around the first telescopic column 92 and the second telescopic column 93, and the upper and lower ends of the spring 94 abut against the contact plate 91 and the bottom of the groove 11.

[0033] It should be noted that a square groove 11 with a depth of 150mm is machined in the middle of the base plate 6. A contact plate 91, a first telescopic column 92, a second telescopic column 93, and a spring 94 are installed within the groove 11. The contact plate 91 is a circular steel plate, fixed to the bottom of the pump body 1 with bolts. The first telescopic column 92 is a solid steel column, welded below the contact plate 91; the second telescopic column 93 is a hollow steel pipe, fitted over the first telescopic column 92 and welded to the bottom of the groove 11. The spring 94 is fitted around the telescopic column, with its upper end pressing against the contact plate 91 and its lower end pressing against the bottom of the groove 11. When the pump body 1 vibrates, the first telescopic column 92 slides within the second telescopic column 93, and the spring 94 compresses to absorb energy. The spring 94 has a stiffness coefficient designed of 50N / mm, which can attenuate more than 80% of high-frequency vibrations. The plastic deformation of the spring 94 should be checked every six months; if the deformation exceeds 10%, it needs to be replaced.

[0034] In an optional embodiment, four traction components 8 are provided, rectangularly positioned at the four lower corners of the top plate 5.

[0035] It should be noted that the four corners are pulled together to form a statically determinate spatial structure, which can balance external forces in any direction.

[0036] The working principle of this utility model is as follows: The pump body 1 is suspended below the top plate 5 by four high-strength tension ropes 84. The two ends of the tension ropes 84 are fixed to the base 81 of the top plate 5 and the second fixing ring 10 of the pump body 1, respectively. During operation, the dynamic load generated by the self-weight of the pump body 1 and the fluid impact is evenly transmitted to the top plate 5 and the support column 7 through the tension ropes 84, reducing the local pressure on the base plate 6 and avoiding foundation overload. The rigid tension of the tension ropes 84 forms a spatial constraint network. When the pump body 1 vibrates radially due to impeller rotation or fluid pulsation, the tension ropes 84 absorb energy through tensile deformation, suppressing the amplitude expansion; at the same time, the rectangular distribution of the tension ropes at the four corners forms a symmetrical constraint force, counteracting the deflection tendency caused by torque and maintaining the centering of the pump body 1.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A suspended semi-suspended centrifugal pump, comprising a pump body (1), a suction section (2), and a drive motor (3), characterized in that, It also includes a stabilizing mechanism (4), which includes a top plate (5) and a bottom plate (6). The top plate (5) and the bottom plate (6) are connected by a support column (7). A traction component (8) is provided below the top plate (5), and a sway suppression component (9) is provided in the middle of the bottom plate (6). The pump body (1) is connected to the traction component (8) above and to the sway suppression component (9) below.

2. The suspended semi-suspended centrifugal pump according to claim 1, characterized in that, The traction assembly (8) includes a base (81), a first fixing ring (82), a first locking hook (83), a traction rope (84), and a second locking hook (85). The base (81) is located below the top plate (5). The first fixing ring (82) is fixed on the base (81). The first locking hook (83) is connected to the first fixing ring (82). One end of the traction rope (84) is fixedly connected to the first locking hook (83), and the other end is fixedly connected to the second locking hook (85).

3. A suspended semi-suspended centrifugal pump according to claim 2, characterized in that, Two second fixing rings (10) are fixedly installed on the outside of the inhalation section (2), and two second fixing rings (10) are also fixedly installed on the outside of the drive motor (3). The installation positions of the four second fixing rings (10) are rectangularly distributed on the plane.

4. A suspended semi-suspended centrifugal pump according to claim 3, characterized in that, The second fixing ring (10) is hooked to the second locking hook (85).

5. A suspended semi-suspended centrifugal pump according to claim 1, characterized in that, The base plate (6) has a groove (11) in the middle. The sway suppression component (9) is installed inside the groove (11). The sway suppression component (9) includes a contact plate (91), a first telescopic column (92), a second telescopic column (93), and a spring (94). The upper part of the contact plate (91) is fixedly connected to the bottom of the pump body (1), and the lower part is fixedly connected to the first telescopic column (92). The second telescopic column (93) is sleeved on the first telescopic column (92) and fixedly connected to the bottom of the groove (11). The spring (94) is sleeved on the outside of the first telescopic column (92) and the second telescopic column (93). The upper and lower ends of the spring (94) abut against the contact plate (91) and the bottom of the groove (11).

6. A suspended semi-suspended centrifugal pump according to claim 2, characterized in that, The traction components (8) are provided in four rectangular positions located at the four lower corners of the top plate (5).

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