Special damping adaptive base for centrifugal pump

Abstract

The utility model relates to the technical field of oil and gas field development equipment, and discloses a special damping adaptive base for a centrifugal pump, which comprises a bottom plate, a pressure-bearing damping mechanism and a heavy-load spring damping mechanism, the pressure-bearing damping mechanism is a multi-layer composite body, an upper supporting panel, a rubber damping pad and a polyurethane buffering pad are sequentially arranged from top to bottom and are fixed into a whole, an anti-corrosion coating is arranged on the surface of the upper supporting panel, and array type long kidney-shaped adaptive hole positions are formed in the multi-layer composite body. The heavy-load spring damping mechanism is provided with a plurality of identical combination bodies distributed at intervals, each combination body comprises a centralizing sleeve, a base plate, a center shaft, a heavy-load spring and a shaft sleeve, and the heavy-load spring is arranged around the center shaft in a sleeving mode and is concentric with the center shaft. The device is simple in structure and low in cost; the service life of equipment is prolonged; the adaptability is good, and installation of various pump bodies is efficiently adapted; and the device is suitable for severe corrosion environments of oil fields, and the maintenance frequency is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of oil and gas field development equipment, specifically to a shock-absorbing and adaptable base for centrifugal pumps. Background Technology

[0002] The existing centrifugal pumps have the following main technical defects when used in oil and gas extraction sites:

[0003] 1. Insufficient vibration damping performance: The high-frequency vibration generated by the pump body during operation is directly transmitted to the foundation, which leads to accelerated wear of pump body components and shortens the service life of the equipment;

[0004] 2. Poor adaptability: Traditional bases are fixed structures and cannot be compatible with the mounting hole positions of different pump models. When changing the pump model, a new base needs to be customized, which increases construction costs.

[0005] 3. Weak corrosion resistance: Oil and gas fields contain corrosive media such as drilling fluid and brine, and the existing surface treatment process for the base is prone to failure, resulting in a decrease in structural strength; Utility Model Content

[0006] To overcome the shortcomings of existing technologies, this utility model provides a shock-absorbing and adaptable base specifically for centrifugal pumps, the technical solution of which is as follows:

[0007] A shock-absorbing and adaptable base for centrifugal pumps includes a base plate; the base plate is equipped with a heavy-duty spring shock-absorbing mechanism, and a pressure-bearing shock-absorbing mechanism is provided above the heavy-duty spring shock-absorbing mechanism; the pressure-bearing shock-absorbing mechanism is a multi-layer composite, consisting of an upper support panel, a rubber shock-absorbing pad, and a polyurethane buffer pad, which are fixed together from top to bottom; the surface of the upper support panel is coated with an anti-corrosion coating; the multi-layer composite has an array of elongated adaptable holes to accommodate the mounting holes of different series of pumps; the heavy-duty spring shock-absorbing mechanism has several identical assemblies spaced apart, each assembly including a centering sleeve. The system consists of a pad, a central shaft, a heavy-duty spring, and a bushing. The pad is fixed to the base plate, and the straightening sleeve is fixed to the edge of the pad. The upper end of the straightening sleeve has an inward annular protrusion. The lower end of the central shaft is fixed to the middle of the pad. The heavy-duty spring is fitted around the central shaft and is concentric with the central shaft. The bushing is fitted around the upper part of the central shaft and can slide vertically along the central shaft. The upper end of the bushing is fixed to the lower side of the multi-layer composite. The lower end of the bushing has an outward annular protrusion. The outward annular protrusion is located above the heavy-duty spring and limits the heavy-duty spring. The inward annular protrusion is located above the outward annular protrusion and limits the outward annular protrusion.

[0008] Furthermore, the upper support panel is made of Q355 high-strength alloy steel.

[0009] Furthermore, the thickness of the upper support panel is 25-30 mm.

[0010] Furthermore, the two ends of the elongated adapter hole are rounded and the middle is rectangular, with the diameter of the rounded ends and the width of the rectangular end both being 22mm; the distance between the two centers of the elongated adapter hole is 50mm; the distance between two adjacent elongated adapter holes in the same row is 50mm.

[0011] Furthermore, the rubber shock-absorbing pad is made of nitrile rubber with a Shore hardness of 60-70 HA and a thickness of 10-20 mm.

[0012] Furthermore, the thickness of the polyurethane cushioning pad is 20-30 mm.

[0013] Furthermore, the anti-corrosion coating is a composite coating, which includes an epoxy zinc-rich primer coating after sandblasting and rust removal pretreatment and a polyurea topcoat coating.

[0014] Furthermore, the epoxy zinc-rich primer coating has a thickness of 80 μm, and the polyurea topcoat coating has a thickness of 120 μm.

[0015] Furthermore, the multi-layer composite is solidified into one piece by vulcanization. The pump body is installed at the elongated adapter hole using bolts. After the bolts pass through the elongated adapter hole, washers are added and the assembly is tightened with nylon lock nuts.

[0016] Furthermore, the heavy-duty spring damping mechanism has eight identical assemblies.

[0017] Compared with the prior art, the present invention mainly has the following beneficial technical effects:

[0018] 1. Simple structure: No complex transmission parts, convenient production and processing, and low cost.

[0019] 2. Vibration and noise reduction: Through a dedicated vibration reduction mechanism using rubber pads, polyurethane pads, and metal springs, the pump body vibration can be effectively absorbed, reducing the impact on the base and surrounding structures and extending the service life of the equipment.

[0020] 3. Good adaptability: Through the horizontal and vertical adjustment of the elongated adapter hole, combined with the hole diameter adapter, it can efficiently adapt to the installation of various pump bodies.

[0021] 4. Corrosion-resistant and durable: With double protection from epoxy zinc-rich primer and polyurea topcoat, combined with oil-resistant shock-absorbing pads, it is suitable for the harsh and corrosive environment of oil fields and reduces the frequency of maintenance. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a front view structural diagram of the present invention;

[0024] Figure 3This is a schematic cross-sectional view of the present invention.

[0025] Figure 4 This is a schematic diagram of the bolt installation of this utility model;

[0026] In the diagram: 1-base plate, 2-heavy-load spring damping mechanism, 3-pressure-bearing damping mechanism, 4-long waist-shaped adapter hole, 5-upper support panel, 6-rubber damping pad, 7-polyurethane buffer pad, 8-shaft sleeve, 9-pad plate, 10-straightening sleeve, 11-inward annular projection, 12-central shaft, 13-heavy-load spring, 14-outward annular projection, 15-bolt, 16-washer, 17-nylon anti-loosening nut. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the embodiments and accompanying drawings. Example 1

[0028] Reference Figures 1 to 4 A shock-absorbing and adaptable base for centrifugal pumps includes a base plate 1; a heavy-duty spring shock-absorbing mechanism 2 is provided on the base plate 1, and a pressure-bearing shock-absorbing mechanism 3 is provided above the heavy-duty spring shock-absorbing mechanism 2; the pressure-bearing shock-absorbing mechanism 3 is a multi-layer composite, consisting of an upper support panel 5, a rubber shock-absorbing pad 6, and a polyurethane buffer pad 7, which are fixed together from top to bottom; the surface of the upper support panel 5 is coated with an anti-corrosion coating; the multi-layer composite has an array of elongated waist-shaped adaptable holes 4 to adapt to the mounting holes of different series of pump bodies; the heavy-duty spring shock-absorbing mechanism 2 has several identical assemblies distributed at intervals, each assembly including a straightening sleeve 10, a pad 9, a central shaft 12, a heavy-duty spring 13, and a shaft. The sleeve 8 and the pad 9 are fixed to the base plate 1. The straightening sleeve 10 is fixed to the edge of the pad 9. The upper end of the straightening sleeve 10 is provided with an inward annular protrusion 11. The lower end of the central shaft 12 is fixed to the middle of the pad 9. The heavy-duty spring 13 is fitted around the central shaft 12 and is concentric with the central shaft 12. The bushing 8 is fitted around the upper part of the central shaft 12 and can slide vertically along the central shaft 12. The upper end of the bushing 8 is fixed to the lower side of the multi-layer composite. The lower end of the bushing 8 is provided with an outward annular protrusion 14. The outward annular protrusion 14 is located above the heavy-duty spring 13 and limits the heavy-duty spring 13. The inward annular protrusion 11 is located above the outward annular protrusion 14 and limits the outward annular protrusion 14. Example 2

[0029] Reference Figures 1 to 4 A shock-absorbing and adaptable base for centrifugal pumps, based on the technical solution described in Example 1, wherein the upper support panel 5 is made of Q355 high-strength alloy steel; the thickness of the upper support panel 5 is 25-30mm. Example 3

[0030] Reference Figures 1 to 4A shock-absorbing adapter base for centrifugal pumps, based on the technical solution described in Example 1, has an elongated adapter hole 4 with rounded ends and a rectangular middle section, the diameter of the rounded ends and the width of the rectangular section are both 22mm; the distance between the two centers of the elongated adapter hole 4 is 50mm; the distance between two adjacent elongated adapter holes 4 in the same row is 50mm. Example 4

[0031] Reference Figures 1 to 4 A shock-absorbing and adaptable base for centrifugal pumps, based on the technical solution described in Example 1, wherein the rubber shock-absorbing pad 6 is made of oil-resistant nitrile rubber with a Shore hardness of 60-70 HA and a thickness of 10-20 mm; and the polyurethane buffer pad 7 has a thickness of 20-30 mm. Example 5

[0032] Reference Figures 1 to 4 A shock-absorbing and adaptable base for centrifugal pumps, based on the technical solution described in Example 1, has a composite anti-corrosion coating comprising an epoxy zinc-rich primer coating after sandblasting and rust removal pretreatment and a polyurea topcoat coating; the epoxy zinc-rich primer coating has a thickness of 80 μm, and the polyurea topcoat coating has a thickness of 120 μm. Example 6

[0033] Reference Figures 1 to 4 A shock-absorbing and adaptable base for centrifugal pumps, based on the technical solution described in Example 1, is a multi-layer composite material that is solidified into one piece by vulcanization. The pump body is installed at the elongated adapter hole 4 using bolts 15. After the bolts 15 pass through the elongated adapter hole 4, washers 16 are added and nylon anti-loosening nuts 17 are used for tightening. Example 7

[0034] Reference Figures 1 to 4 A shock-absorbing and adaptable base for centrifugal pumps, based on the technical solution described in Embodiment 1, has eight identical assemblies for the heavy-duty spring shock-absorbing mechanism 2 to enhance shock absorption and stability.

[0035] To enable those skilled in the art to better understand this utility model, its basic principles are briefly described below:

[0036] 1. Vibration reduction principle: Pump body vibration is transmitted to the middle vibration reduction layer through the upper support panel 5. The rubber vibration damping pad 6 absorbs high-frequency vibration, the polyurethane buffer pad 7 provides secondary vibration reduction, and the heavy-duty spring vibration damping mechanism 2 buffers low-frequency impact. The triple structure works together to reduce vibration transmission efficiency (vibration attenuation rate ≥85%).

[0037] The core of the vibration damping of the rubber damping pad 6 is based on its unique viscoelastic properties. When the long-shaft horizontal pump vibrates during operation, the vibration energy is transferred to the rubber damping pad 6, causing reversible large deformations such as stretching, bending, and shearing of the rubber molecular chains. This change in molecular conformation allows for elastic energy storage. Simultaneously, the mutual friction between the molecular chains generates an internal friction effect, creating damping and converting most of the vibrational mechanical energy into heat energy, which is then dissipated into the environment, thus completing energy dissipation. The nitrile rubber, suitable for oilfield operating conditions, has a high loss factor, effectively attenuating the medium-to-high frequency vibrations generated by the pump operation while preventing damage to the damping performance from oil contamination. Furthermore, the high elasticity of the rubber damping pad 6 ensures stable deformation under static loads such as the pump body weight and rapid recovery to its original shape when subjected to vibration impacts, continuously providing buffering and vibration isolation, and blocking the transmission path of vibration to the base and the ground.

[0038] The shock absorption mechanism of the polyurethane buffer pad 7 is the synergistic effect of its porous structure and viscoelastic properties. The polyurethane contains a large number of uniformly distributed micro-closed pores, which form a distributed "spring system." When vibration acts on the material, it scatters and dissipates vibration energy through the mass-spring effect, with a particularly significant filtering effect on high-frequency vibrations generated during pump operation.

[0039] The core of the heavy-duty spring damping mechanism 2 is elastic deformation energy storage. When the long-shaft horizontal pump vibrates during operation, the vibration energy is transferred to the metallic heavy-duty spring 13. The heavy-duty spring 13 absorbs and stores the vibration energy through its own tensile or compressive elastic deformation. At the same time, it utilizes the spring's restoring characteristic to convert part of the stored energy into elastic restoring force, thus offsetting the vibration impact. The heavy-duty spring 13 is concentric with the central shaft 12 and is constrained by the bushing 8 and the centering sleeve 10, limiting its extension and contraction within the axial range and preventing lateral displacement. This effectively buffers low-frequency vibrations of the pump body.

[0040] 2. Adaptation principle: Through the horizontal and vertical adjustment of the elongated adapter hole 4, combined with the hole diameter adapter, it is compatible with the mounting hole positions of more than 3 mainstream pump types; the hole diameter adapter (specifications φ18 / φ20 / φ22) is detachably connected to the pump body through the elongated adapter hole 4.

Claims

1. A shock absorbing and adaptive base for centrifugal pumps, comprising a base plate, characterized in that, The bottom plate is provided with a heavy load spring damping mechanism, and the heavy load spring damping mechanism is provided with a pressure bearing damping mechanism above; the pressure bearing damping mechanism is a multilayer composite, and is sequentially provided with an upper support panel, a rubber damping pad and a polyurethane buffer pad from top to bottom and is integrated as a whole; the upper support panel is provided with a corrosion-resistant coating on the surface; the multilayer composite is provided with arrayed long-waisted adaptive holes for adapting to different series of pump body mounting hole positions; the heavy load spring damping mechanism is provided with a plurality of equally spaced combination bodies; each combination body comprises a centralizing sleeve, a pad, a central shaft, a heavy load spring and a shaft sleeve; the pad is fixed on the bottom plate; the centralizing sleeve is fixed on the edge of the pad; the upper end of the centralizing sleeve is provided with an inward ring protrusion; the lower end of the central shaft is fixed in the middle of the pad; the heavy load spring is sleeved around the central shaft and is concentric with the central shaft; the shaft sleeve is sleeved around the upper part of the central shaft and can vertically slide along the central shaft; the upper end of the shaft sleeve is fixed to the lower side of the multilayer composite; the lower end of the shaft sleeve is provided with an outward ring protrusion; the outward ring protrusion is located above the heavy load spring and limits the heavy load spring; the inward ring protrusion is located above the outward ring protrusion and limits the outward ring protrusion.

2. A shock absorbing and conformable base for a centrifugal pump as defined in claim 1, wherein, The material of the upper support panel is Q355 high-strength alloy steel.

3. A shock absorbing and conformable base for a centrifugal pump as defined in claim 1, wherein, The thickness of the upper support panel is 25-30 mm.

4. A shock absorbing and conformable base for a centrifugal pump as defined in claim 1, wherein, The two ends of the long-waisted adaptive hole are circular arcs, and the middle part is a rectangle; the diameters of the circular arcs and the width of the rectangle are both 22 mm; the distance between the centers of the two circular arcs is 50 mm; the distance between the two adjacent long-waisted adaptive holes in the same row is 50 mm.

5. A shock absorbing and conformable base for a centrifugal pump as defined in claim 1, wherein, The material of the rubber damping pad is nitrile rubber, and the Shore hardness thereof is 60-70 HA; the thickness thereof is 10-20 mm.

6. A shock absorbing and conformable base for a centrifugal pump as defined in claim 1, wherein, The thickness of the polyurethane buffer pad is 20-30 mm.

7. A shock absorbing and conformable base for a centrifugal pump as defined in claim 1, wherein, The corrosion-resistant coating is a composite coating, which comprises an epoxy zinc-rich primer coating and a polyurea topcoat coating after sandblasting and rust removal pretreatment.

8. A shock absorbing and adaptive base for a centrifugal pump as claimed in claim 7, characterized in that, The thickness of the epoxy zinc-rich primer coating is 80 μm, and the thickness of the polyurea topcoat coating is 120 μm.

9. A shock absorbing and conformable base for a centrifugal pump as defined in claim 1, wherein, The multilayer composite is integrated by vulcanization, and the pump body is installed at the long-waisted adaptive hole by means of a bolt; after the bolt penetrates through the long-waisted adaptive hole, a washer is additionally installed and fastened by a nylon lock nut.

10. A shock absorbing and conformable base for a centrifugal pump as defined in claim 1, wherein, The heavy load spring damping mechanism is provided with eight identical combination bodies.

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