CN214403991U - Centrifugal pump convenient to overhaul - Google Patents

Abstract

The utility model relates to a centrifugal pump field discloses a centrifugal pump convenient to overhaul, including consecutive pump body, bearing frame and motor, the pump body includes preceding double-layered lid and back double-layered lid, and preceding double-layered lid and back double-layered lid constitute the cavity that supplies impeller work jointly, the back both ends of preceding double-layered lid are provided with the first fixed concave station of horizontal direction to the indent, are provided with combination ring seal on the first fixed concave station, and combination ring seal's interior anchor ring slope expands outward, and back double-layered lid and the shape that preceding double-layered lid corresponds one end are kept away from back double-layered lid one side shape with combination ring seal and are matchd, and preceding double-layered lid periphery, back double-layered lid periphery and first annular are provided with the first screw hole that corresponds on enclosing, the threaded hole in the first screw. The front clamping cover and the rear clamping cover of the pump body are convenient to align and install, the disassembly and assembly difficulty is reduced, the pump is convenient to overhaul and clean, and the service life of the centrifugal pump is effectively prolonged.

Description

Centrifugal pump convenient to overhaul

Technical Field

The utility model relates to a centrifugal pump, in particular to centrifugal pump convenient to overhaul.

Background

The centrifugal pump can be widely used for conveying slurry containing solid particles in the industries of electric power, metallurgy, coal, building materials and the like. Such as hydraulic ash removal in thermal power plants, ore pulp transportation in metallurgical dressing plants, coal slurry and dense medium transportation in coal washing plants, and the like. When the centrifugal pump works, the pump needs to be placed on the land, the water suction pipe is placed in water, and the pump needs to be filled and started. Due to the structural limitation of the slurry pump and the submerged centrifugal pump, the motor needs to be placed above the water surface during operation, and the pump is placed in water and therefore needs to be fixed. After the centrifugal pump is assembled, the technical requirement on alignment installation is high, the assembly and disassembly are very troublesome, the cleaning is inconvenient, substances conveyed by the centrifugal pump can be adhered to an impeller of the centrifugal pump at times, the centrifugal pump can be damaged or destroyed due to long-time work, and the service life of the centrifugal pump is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem provide a centrifugal pump convenient to overhaul.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a centrifugal pump convenient to overhaul, includes consecutive pump body, bearing frame and motor, be provided with the impeller in the pump body, be provided with on the motor and pass the bearing frame and stretch into the pump body in with the fixed pivot of impeller, the pump body includes preceding clamp cover and back clamp cover, preceding clamp cover constitutes the cavity that supplies impeller work with back clamp cover jointly, both ends are provided with the first fixed concave station of water inlet and horizontal direction indent respectively around the preceding clamp cover, be provided with combination ring seal on the first fixed concave station, combination ring seal is including covering first ring-shaped seal ring, second ring-shaped seal ring and the third ring-shaped seal ring of vertical face between preceding clamp cover rear end periphery, first fixed concave station and preceding clamp cover rear end and the first fixed concave station respectively, third ring-shaped seal ring's circle body cross-section is right trapezoid, the difference that the external diameter that third ring-shaped seal ring is located first ring-shaped seal ring one end is less than that third ring-shaped seal ring is located second ring-shaped seal ring is located The shape of one end, corresponding to the front clamping cover, of the rear clamping cover is matched with the shape of one side, away from the rear clamping cover, of the combined annular sealing ring, corresponding first threaded holes are formed in the periphery of the front clamping cover, the periphery of the rear clamping cover and the first annular tight ring, and fastening screws are arranged in the first threaded holes. The front clamping cover and the rear clamping cover of the pump body are convenient to align and install, the disassembly and assembly difficulty is reduced, the pump is convenient to overhaul and clean, and the service life of the centrifugal pump is effectively prolonged.

Further, the method comprises the following steps: the rear clamping cover is provided with an inward annular groove in the horizontal direction on one side far away from the front clamping cover, a fourth annular sealing ring is arranged in the annular groove, the bearing seat comprises a bearing seat shell and a bearing arranged in the bearing seat shell, one side, corresponding to the rear clamping cover, of the bearing seat shell is outwards provided with an annular fastening structure matched with the annular groove, corresponding second threaded holes are formed in the annular groove, the fourth annular sealing ring and the annular fastening structure, and fastening screws are arranged in the second threaded holes. Convenient to counterpoint the installation, easy dismounting is convenient for maintain cleanly.

Further, the method comprises the following steps: the axle center position of back press from both sides the lid is provided with the pivot hole, the downthehole mechanical seal device that is provided with of pivot, the bearing frame includes bearing frame casing and bearing, the bearing frame casing is kept away from back press from both sides lid one end and is provided with seal structure, the bearing frame casing has constituteed sealed cavity with the back press from both sides the lid, be provided with the atmospheric pressure detection device on the bearing frame casing of sealed cavity top. The air pressure monitoring is improved at any time, the sealing condition of the bearing seat and the pump body is timely discovered, the shutdown maintenance is carried out after the fault is found, and the service life of the centrifugal pump is prolonged.

Further, the method comprises the following steps: and an anti-loosening spring is arranged on the fastening screw. Prevent the fastening screw from falling off.

Further, the method comprises the following steps: the combined annular sealing ring and the fourth annular sealing ring are both made of fluorosilicone rubber materials. The oil resistance, the solvent resistance, the fuel oil resistance and the high and low temperature resistance are all good.

Drawings

FIG. 1 is a schematic partial cross-sectional view of the present invention;

FIG. 2 is a schematic partial cross-sectional view of a composite annular seal ring;

labeled as: the air pressure detection device comprises an impeller 101, a front clamping cover 110, a water inlet 111, a first fixing concave table 112, a rear clamping cover 120, a mechanical sealing device 121, a bearing seat shell 210, a bearing 220, a rotating shaft 301, a combined annular sealing ring 400, a first annular sealing ring 410, a second annular sealing ring 420, a third annular sealing ring 430, a fourth annular sealing ring 440, a fastening screw 510, a sealing cavity 600 and an air pressure detection device 700.

Detailed Description

As shown in fig. 1, the centrifugal pump convenient for maintenance comprises a pump body, a bearing seat and a motor which are connected in sequence, wherein an impeller 101 is arranged in the pump body, a rotating shaft 301 which penetrates through the bearing seat and extends into the pump body to be fixed with the impeller 101 is arranged on the motor, the pump body comprises a front clamping cover 110 and a rear clamping cover 120, the front clamping cover 110 and the rear clamping cover 120 jointly form a cavity for the impeller 101 to work, a water inlet 111 and a first fixed concave table 112 which is inwards concave in the horizontal direction are respectively arranged at the front end and the rear end of the front clamping cover 110, a combined annular sealing ring 400 is arranged on the first fixed concave table 112, the combined annular sealing ring 400 comprises a first annular sealing ring 410, a second annular sealing ring 420 and a third annular sealing ring 430 which are respectively covered on the periphery of the rear end of the front clamping cover 110, the first fixed concave table 112 and a vertical surface between the rear end of the front clamping cover 110 and the first fixed concave table 112, the section of the ring body of the third annular sealing ring 430 is a right trapezoid, the difference between the inner diameter and the outer diameter of the third annular sealing ring 430 at one end of the first annular sealing ring 410 is smaller than the difference between the inner diameter and the outer diameter of the third annular sealing ring 430 at one end of the second annular sealing ring 420, the shape of the corresponding end of the rear clamping cover 120 and the front clamping cover 110 is matched with the shape of the side, away from the rear clamping cover 120, of the combined annular sealing ring 400, corresponding first threaded holes are formed in the periphery of the front clamping cover 110, the periphery of the rear clamping cover 120 and the first annular sealing ring 410, and fastening screws 510 are arranged in the first threaded holes. In specific implementation, the combined annular sealing ring 400 forms an outward-expanded fit inclined plane on the first fixed concave table 112, the butt joint end of the rear clamping cover 120 is in butt joint with and pressed against the inclined plane along the combined annular sealing ring 400 in opposite directions, the initial alignment is not required to be very accurate, the alignment is automatically corrected in the sliding and pressing sealing process, the alignment and installation are convenient, the front clamping cover 110 and the rear clamping cover 120 of the pump body are conveniently installed in an aligned mode, the disassembly and assembly difficulty is reduced, the maintenance and the cleaning are convenient, and the service life of the centrifugal pump is effectively prolonged.

On the basis, as shown in fig. 1, an annular groove is formed in one side, away from the front clamping cover 110, of the rear clamping cover 120, and the annular groove is inward in the horizontal direction, a fourth annular sealing ring 440 is arranged in the annular groove, the bearing seat comprises a bearing seat housing 210 and a bearing 220 arranged in the bearing seat housing 210, an annular fastening structure matched with the annular groove is outwards arranged on one side, corresponding to the rear clamping cover 120, of the bearing seat housing 210, corresponding second threaded holes are formed in the annular groove, the fourth annular sealing ring 440 and the annular fastening structure, and fastening screws 510 are arranged in the second threaded holes. In the concrete implementation, accurate counterpoint when butt joint is fixed guarantees to be in coaxial state after the installation, and the installation of being convenient for counterpoint, easy dismounting, the maintenance of being convenient for is clean.

On the basis, as shown in fig. 1, a rotating shaft hole is formed in the axis position of the rear clamping cover 120, a mechanical sealing device 121 is arranged in the rotating shaft hole, the bearing seat comprises a bearing seat shell 210 and a bearing 220, a sealing structure is arranged at one end, away from the rear clamping cover 120, of the bearing seat shell 210, the bearing seat shell 210 and the rear clamping cover 120 form a sealing cavity 600, and an air pressure detection device 700 is arranged on the bearing seat shell 210 above the sealing cavity 600. In implementation, the air pressure detection device 700 can be observed when the air pressure detection device starts to work, when the sealing of the mechanical sealing device 121 is in a problem, the air pressure data displayed by the air pressure detection device 700 can fluctuate unstably, the sealing condition of the sealing structures such as the mechanical sealing device 121 on the bearing seat can be determined, and when the mechanical sealing device 121 is abnormal in work, auxiliary judgment can be carried out according to the reaction condition of the air pressure detection device 700; the air pressure monitoring is improved at any time, the sealing condition of the bearing seat and the pump body is timely discovered, the shutdown maintenance is carried out after the fault is found, and the service life of the centrifugal pump is prolonged.

In addition to the above, as shown in fig. 1, a locking spring is provided on the fastening screw 510. Preventing the fastening screw 510 from falling off.

On the basis of the above, as shown in fig. 1, the combined annular sealing ring 400 and the fourth annular sealing ring 440 are both made of fluorosilicone rubber material. The oil resistance, the solvent resistance, the fuel oil resistance and the high and low temperature resistance are all good.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (5)

1. The utility model provides a centrifugal pump convenient to overhaul, includes consecutive pump body, bearing frame and motor, be provided with impeller (101) in the pump body, be provided with on the motor and pass the bearing frame and stretch into in the pump body with fixed pivot (301) of impeller (101), its characterized in that: the pump body includes preceding press from both sides lid (110) and back press from both sides lid (120), preceding press from both sides lid (110) and back press from both sides lid (120) and constitute the cavity that supplies impeller (101) work jointly, both ends are provided with water inlet (111) and first fixed concave station (112) of horizontal direction indent respectively around preceding press from both sides lid (110), be provided with combination ring seal (400) on first fixed concave station (112), combination ring seal (400) are including covering first ring seal (410), second ring seal (420) and third ring seal (430) of vertical face between preceding press from both sides lid (110) rear end periphery, first fixed concave station (112) and preceding press from both sides lid (110) rear end and first fixed concave station (112) respectively, the circle body cross-section of third ring seal (430) is right trapezoid, the difference that the external diameter is less than third ring seal (430) and is located second ring seal (430) of the interior external diameter that third ring seal (430) is located first ring seal (410) one end The difference between the inner diameter and the outer diameter of one end of the sealing ring (420), the shape of the corresponding end of the rear clamping cover (120) and the front clamping cover (110) is matched with the shape of one side, away from the rear clamping cover (120), of the combined annular sealing ring (400), corresponding first threaded holes are formed in the periphery of the front clamping cover (110), the periphery of the rear clamping cover (120) and the first annular sealing ring (410), and fastening screws (510) are arranged in the first threaded holes.

2. A centrifugal pump for easy maintenance according to claim 1, wherein: the utility model discloses a bearing frame, including back press from both sides lid (120) and back press from both sides lid (110), back press from both sides lid (120) and keep away from preceding press from both sides lid (110) one side and be provided with the inward annular groove of horizontal direction, be provided with fourth annular sealing washer (440) in the annular groove, the bearing frame includes bearing frame casing (210) and bearing (220) of setting in bearing frame casing (210), bearing frame casing (210) correspond one side with back press from both sides lid (120) and outwards be provided with the annular fastening structure that matches with the annular groove, fourth annular sealing washer (440) and annular fastening structure are last to be provided with corresponding second screw hole, the threaded hole of second is provided with fastening screw (510).

3. A centrifugal pump for easy maintenance according to claim 2, wherein: the axle center position of back press from both sides lid (120) is provided with the pivot hole, be provided with mechanical seal device (121) in the pivot hole, the bearing frame includes bearing frame casing (210) and bearing (220), bearing frame casing (210) are kept away from back press from both sides lid (120) one end and are provided with seal structure, sealed cavity (600) have been constituteed with back press from both sides lid (120) to bearing frame casing (210), be provided with atmospheric pressure detection device (700) on bearing frame casing (210) of sealed cavity (600) top.

4. A centrifugal pump for easy maintenance according to claim 3, wherein: and an anti-loosening spring is arranged on the fastening screw (510).

5. A centrifugal pump for easy maintenance according to claim 1, wherein: the combined annular sealing ring (400) and the fourth annular sealing ring (440) are both made of fluorosilicone rubber materials.

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