CN210949237U - Foreign matter preventing device at shaft end of nuclear power centrifugal fan - Google Patents
Foreign matter preventing device at shaft end of nuclear power centrifugal fan Download PDFInfo
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- CN210949237U CN210949237U CN201921446270.XU CN201921446270U CN210949237U CN 210949237 U CN210949237 U CN 210949237U CN 201921446270 U CN201921446270 U CN 201921446270U CN 210949237 U CN210949237 U CN 210949237U
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Abstract
The utility model discloses a foreign matter preventing device for a shaft end of a nuclear power centrifugal fan, which comprises a canvas body, wherein the canvas body is in a circular shape matched with the size of the shaft end of the fan, a circle of magnet is arranged in the canvas body, the circle of magnet is distributed along the circumferential edge of the canvas body, so that the magnet is tightly attached to a fan volute, and no gap is formed to prevent foreign matters from entering the inside of the fan; furthermore, another circle of magnet can be arranged at a preset distance from the circumferential edge of the sail cloth, so that the sail cloth body is tightly attached to the fan volute; the whole device is divided into two semicircular parts, so that the device is suitable for various fan maintenance working conditions, and the magnet is arranged between the two semicircular parts, so that the two semicircular parts are simply and effectively connected; the canvas body is made of PVC double-sided rubber-lined flame-retardant cloth, and has the effects of oil resistance, scratch resistance and flame retardance; the group of the mounting hole that the center of canvas body set up ties the rope and can tie up the canvas body tightly in the epaxial of fan.
Description
Technical Field
The utility model relates to a nuclear power protection instrument field especially relates to a foreign matter device is prevented to nuclear power centrifugal fan axle head.
Background
The fan is a machine for conveying gas, and is equipment for converting mechanical energy into gas potential energy or kinetic energy. The most used in the nuclear power station is a fan which provides air conveying power for ventilation and air conditioning systems of various plants and various working areas of the nuclear power station. For example, according to the calculation, the number 1-6 unit of Yangjiang nuclear power has more than 2000 fans, wherein more than 500 centrifugal fans are arranged, and at least 2-3 centrifugal fans are in the maintenance state every day.
Referring to fig. 1, the blower includes a collector 1, a casing 3, and a transmission part 4, an impeller 2 is mounted on a rotor of the blower, and gas axially enters the impeller, then is radially discharged, and enters a volute of the blower, wherein arrows indicate the direction of the gas flow.
In the maintenance work of the rotating equipment, the work of preventing foreign matters is the best of the work, so that a maintenance person needs to frequently check whether foreign matters exist or not, and the foreign matters enter between fan impellers due to carelessness in the maintenance process. Once the foreign matter enters, even if the foreign matter is found, the equipment can be repeatedly disassembled and maintained, the construction period is delayed, and if the foreign matter is not found, the equipment can be damaged in the operation process of the equipment.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned demand, a foreign matter device is prevented to nuclear power centrifugal fan axle head is provided.
The utility model provides a technical scheme that its technical problem adopted is: the foreign matter device is prevented to nuclear power centrifugal fan axle head of structure, includes the canvas body, the canvas body be with the size assorted of fan axle head is circular, this internal round magnet that is provided with of canvas, the round magnet is followed the circumferential edge reason of canvas body distributes, the center of canvas body is provided with one with the mounting hole of fan axle looks adaptation.
Preferably, another circle of magnet is further arranged in the canvas body at a preset distance from the circumferential edge of the canvas body.
Preferably, the canvas body is formed by splicing two semicircular parts, and each semicircular part is provided with a row of magnets along the splicing edge of the semicircular part.
Preferably, each semicircular part is provided with a semicircular notch at the position of the circle center of the semicircular part, and the semicircular notches of the two semicircular parts are spliced to form the mounting hole; wherein, the semicircular gap is also provided with a telescopic structure which can adjust the size of the semicircular gap.
Preferably, the telescopic structure is a binding rope sewn on the semicircular gap.
Preferably, the canvas material that the canvas body adopted is PVC two-sided lining rubber fire-retardant cloth.
Preferably, the canvas body has a thickness of 0.9 mm.
The utility model discloses a foreign matter device is prevented to nuclear power centrifugal fan axle head has following beneficial effect: the device can be designed with various types and sizes according to the cambered surface of the fan volute, can cover all nuclear power centrifugal fans, and meanwhile, a circle of magnet is arranged at the circumferential edge of the canvas body, so that the magnet is tightly attached to the fan volute, no gap is formed, and foreign matters are prevented from entering the fan; furthermore, a circle of magnet can be additionally arranged to ensure that the canvas body is tightly attached to the fan volute after installation; in order to be convenient to install, the whole device is divided into two semicircular parts, so that the device is suitable for various fan maintenance working conditions on site, and meanwhile, the magnet is arranged between the two semicircular parts, so that the connection mode between the two semicircular parts is simple and effective; the canvas body is made of PVC double-sided rubber-lined flame-retardant cloth, and has the effects of oil resistance, scratch resistance and flame retardance; the group's rope of tying on the semicircular gap can tie up the canvas body tightly on the axle of fan.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts:
FIG. 1 is a schematic view of a nuclear centrifugal fan;
FIG. 2 is the structure schematic diagram of the utility model discloses foreign matter device is prevented to nuclear power centrifugal fan axle head.
Detailed Description
In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Exemplary embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the embodiments and specific features in the embodiments of the present invention are described in detail in the present application, but not limited to the present application, and the technical features in the embodiments and specific features in the embodiments of the present invention can be combined with each other without conflict.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 2, the utility model discloses a foreign matter device is prevented to nuclear power centrifugal fan axle head includes canvas body 100, canvas body 100 be with the size assorted of fan axle head is circular. Various types and sizes can be designed according to the cambered surface of the fan volute, all centrifugal fans of nuclear power are covered, and the direct size of 1000mm is taken as an example for illustration.
Wherein, the center of the canvas body 100 is provided with a mounting hole 300 adapted to the shaft of the fan, such as a hole with a diameter of 80 mm.
A circle of magnet stones 200 are arranged in the canvas body 100, for example, the magnet stones 200 can be fixed in the canvas body 100 by sewing. The circle of magnet 200 is along the circumferential edge of canvas body 100 evenly distributed, so the iron stone closely laminates on the fan spiral case, does not have the gap and has avoided inside the foreign matter gets into the fan. The specific number of the ring of the magnet 200 is not limited, and may be, for example, 10.
Preferably, another circle of the magnet 200 is further disposed in the canvas body 100 at a predetermined distance (for example, 100mm) from the circumferential edge thereof, and the number is not limited, for example, 10 magnets may be uniformly distributed. Therefore, the canvas body 100 can be tightly attached to the fan volute after being installed.
For the convenience of installation, the canvas body 100 is formed by splicing two semicircular parts, and the two semicircular parts have the same size. Each semicircular part is provided with a row of magnets 200 along the splicing edge of the semicircular part, and the number of the magnets is not limited, for example, 10 magnets can be provided. In this way, the connection between the two semicircular parts can be made simple and effective.
Each semicircular part is provided with a semicircular notch at the position of the circle center, and the semicircular notches of the two semicircular parts are spliced to form the mounting hole 300.
Preferably, the semicircular gap is further provided with a telescopic structure capable of adjusting the size of the semicircular gap. For example, the retractable structure is a binding rope sewn on the semicircular notch. The canvas body 100 can be tightly bound on the shaft of the fan by the binding rope
In this embodiment, the canvas body 100 has a thickness of 0.9 mm. Preferably, the canvas material adopted by the canvas body 100 is PVC double-faced rubber-lined flame-retardant cloth, and has oil-proof, scratch-proof and flame-retardant effects.
Preferably, the canvas body 100 is orange, and is eye-catching and beautiful, and has a color consistent with a color specified by foreign matter prevention management requirements of a nuclear power plant.
It can be understood that the size of the device in the utility model is designed according to the cambered surface of the fan volute, and generally has multiple model sizes of 400, 600, 800, 1000, 1200mm and the like, covers all centrifugal fan volute sizes of nuclear power, and forms a serialized design. In conclusion, the device of the utility model improves the reliability of foreign matter prevention during maintenance; furthermore, the maintenance efficiency is greatly improved. The volute of the centrifugal fan has various sizes, can cover the sizes of all the volutes of the centrifugal fans of nuclear power, forms a serialized design and ensures the overall attractive effect in field maintenance.
While the embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many modifications may be made by one skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (7)
1. The utility model provides a foreign matter device is prevented to nuclear power centrifugal fan axle head, a serial communication port, including the canvas body, the canvas body be with the size assorted of fan axle head is circular, this internal round magnet that is provided with of canvas, the round magnet is followed the circumferential edge reason of canvas body distributes, the center of canvas body is provided with one with the mounting hole of fan axle looks adaptation.
2. The foreign matter prevention device at the shaft end of the nuclear power centrifugal fan as recited in claim 1, wherein another circle of magnet is further arranged in the canvas body at a preset distance from the circumferential edge of the canvas body.
3. The shaft end foreign matter prevention device for the nuclear power centrifugal fan as claimed in claim 1, wherein the canvas body is formed by splicing two semicircular parts, and each semicircular part is provided with a row of magnets along the splicing edge of the semicircular part.
4. The shaft end foreign matter prevention device for the nuclear power centrifugal fan as claimed in claim 3, wherein each semicircular part is provided with a semicircular notch at the position of the center of the circle, and the semicircular notches of the two semicircular parts are spliced to form the mounting hole; wherein, the semicircular gap is also provided with a telescopic structure which can adjust the size of the semicircular gap.
5. The shaft end foreign body prevention device for the nuclear power centrifugal fan as claimed in claim 4, wherein the telescopic structure is a binding rope sewn on the semicircular notch.
6. The foreign matter prevention device for the shaft end of the nuclear power centrifugal fan as claimed in claim 1, wherein the canvas body is made of PVC double-faced rubber-lined flame-retardant cloth.
7. The shaft end foreign matter prevention device for the nuclear power centrifugal fan as claimed in claim 1, wherein the canvas body is 0.9mm thick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921446270.XU CN210949237U (en) | 2019-09-02 | 2019-09-02 | Foreign matter preventing device at shaft end of nuclear power centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921446270.XU CN210949237U (en) | 2019-09-02 | 2019-09-02 | Foreign matter preventing device at shaft end of nuclear power centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210949237U true CN210949237U (en) | 2020-07-07 |
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ID=71377609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921446270.XU Active CN210949237U (en) | 2019-09-02 | 2019-09-02 | Foreign matter preventing device at shaft end of nuclear power centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210949237U (en) |
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2019
- 2019-09-02 CN CN201921446270.XU patent/CN210949237U/en active Active
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