CN210583982U - Filter for million kilowatt nuclear power station - Google Patents
Filter for million kilowatt nuclear power station Download PDFInfo
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- CN210583982U CN210583982U CN201920905088.XU CN201920905088U CN210583982U CN 210583982 U CN210583982 U CN 210583982U CN 201920905088 U CN201920905088 U CN 201920905088U CN 210583982 U CN210583982 U CN 210583982U
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- inorganic fiber
- pressure difference
- nuclear power
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Abstract
The filter comprises a filter cylinder, a filter element arranged in the filter cylinder, a bypass valve, a pressure difference alarm and an anti-false alarm connected with the pressure difference alarm; the pressure difference alarm is connected with the bypass valve, the pressure difference alarm is used for detecting the pressure difference at the two ends of the filter element so as to control the opening and closing of the bypass valve, and the false alarm preventing device is used for preventing false alarm of the pressure difference alarm when the filter is in cold start. This application is because the pressure differential alarm is connected with prevents the wrong report ware, when the filter carries out cold start, prevents that the wrong report ware can prevent the wrong report of pressure differential alarm ware, and pressure differential alarm ware can normally work after the definite time, and when the pressure differential alarm ware detected the pressure differential at filter core both ends and was greater than the predetermined value, the control bypass valve was opened, and liquid does not pass through the direct discharge of filter core, and the pressure differential alarm ware instructs the bypass valve to be in the state of having opened, and then can make things convenient for the operation.
Description
Technical Field
The utility model belongs to the technical field of nuclear power station diesel engine hydraulic system, especially, relate to a million kilowatt level filter for nuclear power station.
Background
The filter is an important auxiliary device used for controlling oil pollution in the hydraulic system, effectively controls the oil pollution of the hydraulic system, purifies the oil, and has very important significance for prolonging the service life of a hydraulic element and improving the filtering performance of the hydraulic system.
The existing filter generally has the problem of indicating function when the pressure exceeds a preset value, the operation state of components in the filter is difficult to know, and particularly, false alarm often occurs when the filter is cold started.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a million kilowatt level is filter for nuclear power station aims at solving the filter among the prior art and is difficult to learn the technical problem of running state.
In order to achieve the above object, the utility model adopts the following technical scheme: a filter for a million kilowatt nuclear power station comprises a filter cylinder, a filter element, a bypass valve, a pressure difference alarm and a false alarm prevention device, wherein the filter element, the bypass valve and the pressure difference alarm are arranged in the filter cylinder; the pressure difference alarm is connected with the bypass valve, the pressure difference alarm is used for detecting the pressure difference at the two ends of the filter element so as to control the opening and closing of the bypass valve, and the false alarm preventing device is used for preventing false alarm of the pressure difference alarm when the filter is in cold start.
Furthermore, the pressure difference alarm is a visual pressure difference signal transmitter, and the false alarm preventer is a time delay device.
Further, the filter element comprises a support and a filter layer, the support comprises an inner support and an outer support which are enclosed to be cylindrical, the outer support is sleeved outside the inner support, the filter layer is embedded between the outer support and the inner support, a plurality of folds are formed on the filter layer along the circumferential direction of the cross section of the filter layer, and two adjacent folds form a filter groove with an outward opening.
Further, each of the wrinkles is uniformly distributed in a circumferential direction.
Further, the filter layer comprises a plurality of first inorganic fiber strips, a plurality of second inorganic fiber strips and a plurality of bonding pieces, wherein the first inorganic fiber strips are arranged in parallel at intervals, the second inorganic fiber strips are arranged in parallel at intervals, the first inorganic fiber strips and the second inorganic fiber strips are crossed to form a plurality of grids, all the second inorganic fiber strips are positioned on the same side of the first inorganic fiber strips, and the bonding pieces are bonded at nodes of the grids to bond the first inorganic fiber strips and the second inorganic fiber strips together.
Further, the adhesive is epoxy resin.
Further, the first inorganic fiber strip and the second inorganic fiber strip are both glass fiber strips.
Furthermore, the support part is a high molecular polymer support part with a grid structure.
Further, the filter core still includes and is cylindric dabber, a plurality of through-holes have been seted up to the lateral wall of dabber, the dabber is located in the space that interior support piece encloses.
Further, the filter element also comprises a winding belt wound on the outer wall of the outer support.
The utility model has the advantages that: the utility model discloses a million kilowatt level is filter for nuclear power station because the pressure differential alarm is connected with prevents the wrong report ware, when the filter carries out cold start, prevents that the wrong report ware can prevent the pressure differential alarm is alert, and the pressure differential alarm can normally work after the certain time, and when the pressure differential alarm detected the pressure differential at filter core both ends and was greater than the predetermined value, the control bypass valve was opened, and liquid does not pass through the direct discharge of filter core, and the pressure differential alarm instructs the bypass valve to be in the state of having opened, and then can facilitate the operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a simplified schematic diagram of a filter for a million kilowatt nuclear power station according to an embodiment of the present invention;
FIG. 2 is a partial cross-sectional view of a filter insert of the filter for a megawatt nuclear power plant of FIG. 1;
fig. 3 is a schematic view of the filter layer of the filter cartridge shown in fig. 2.
Wherein, in the figures, the respective reference numerals:
10-filter 101-inlet 102-outlet
103-sewage draining outlet 104-air exhausting outlet 200-filter element
210-support 211-inner support 212-outer support
220-filter layer 210-first inorganic fiber strip 211-second inorganic fiber strip
212-cemented part 230-tape 240-mandrel
241-through hole 300-bypass valve 400-pressure difference alarm
500-false alarm prevention device 600-electrical pressure difference signaling device.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1, the embodiment of the present invention provides a filter 10 for a million kilowatt-level nuclear power station, which includes a filter cartridge 100, a filter element 200, a bypass valve 300, a differential pressure alarm 400 and a false alarm prevention device 500, wherein the filter element 200, the bypass valve 300 and the differential pressure alarm 400 are disposed in the filter cartridge 100, a part of the differential pressure alarm 400 is exposed out of the filter cartridge 100, and an accommodating space is provided between the filter element 200 and an inner wall of the filter cartridge 100. The false alarm preventer 500 is connected to the differential pressure alarm 400, and the filter cartridge 100 is provided with a liquid inlet 101 and a liquid outlet 102. The bypass valve 300 is a pressure control valve, the pressure difference alarm 400 is connected with the bypass valve 300, the pressure difference alarm 400 is used for detecting the pressure difference between two ends of the filter element 200 so as to control the opening and closing of the bypass valve 300, the alarm pressure of the pressure difference alarm 400 is lower than the opening pressure of the bypass valve 300, the opening pressure of the bypass valve 300 can be set to be 3.4Bar, when the pressure difference between two ends of the filter element 200 is detected to reach a preset value, the bypass valve 300 is opened, the pressure difference alarm 400 indicates that the bypass valve 300 is opened, liquid directly flows to the liquid outlet 102 from the liquid inlet 101 without passing through the filter element 200, the overhigh pressure of the upstream of the filter 10 can be prevented, the downstream system of the filter 10.
The filter 10 for the million kilowatt nuclear power station provided by the embodiment, because the differential pressure alarm 400 is connected with the false alarm prevention device 500, when the filter 10 is cold-started, the false alarm prevention device 500 can prevent the false alarm of the differential pressure alarm 400, the differential pressure alarm 400 can normally work after a certain time, when the differential pressure alarm 400 detects that the differential pressure at two ends of the filter element 200 is greater than a preset value, the bypass valve 300 is controlled to be opened, liquid is directly discharged without passing through the filter element 200, and the differential pressure alarm 400 indicates that the bypass valve 300 is in an opened state, so that the operation can be facilitated.
The filter 10 is substantially cylindrical as a whole; the pressure difference alarm 400 can be a visual pressure difference transmitter, which can be disposed at the mounting opening of the top of the filter cartridge 100, and comprises a hollow card seat, a piston, a button, a spring and an indicator, which are accommodated in the card seat, wherein one end of the button is fixed with one end of the piston by magnetic attraction, and one end of the indicator is embedded at one end of the spring. When the pressure difference between the two ends of the filter element 200 reaches a preset value, the piston compresses the spring due to stress, so that the button is separated from the magnet of the piston, at the moment, the spring bounces the indicator, the indicator extends out of the clamping seat, the alarm is displayed, and once the alarm is given, the button can keep the alarm state until the alarm is reset manually. The side wall of the filter cartridge 100 near the bottom may be provided with an electrical differential pressure signal transmitter 600 for sending a signal to the bypass valve 300 to control the bypass valve 300 to open when the pressure difference across the filter cartridge 200 is detected to reach a predetermined value.
In order to facilitate the operation during maintenance, the top of the filter cartridge 100 can be provided with a quick-release cover plate, and when the filter element 200 needs to be replaced, the cover plate is taken down to complete the replacement of the filter element 200. An air outlet 104 is formed at the top of the filter cartridge 100, and air in the filter cartridge 100 can be discharged through the air outlet 104 at the beginning of operation, and then the filtering operation is performed; the liquid inlet 101 is arranged on the side wall of the filter cartridge 100 close to the bottom, the liquid outlet 102 is arranged at the bottom end of the filter cartridge 100, the sewage outlet 103 is arranged at the side of the liquid outlet 102, and when the filter 10 is overhauled, the sewage outlet 103 is opened to discharge the residual liquid in the filter cartridge 100.
In one embodiment, the false alarm prevention device 500 is a time delay device, when the filter 10 is in a cold start, because the time delay device prevents the indicator of the differential pressure alarm 400 from popping out of the clamping seat, after a period of time when the filter 10 works normally, the indicator of the differential pressure alarm 400 is in a state of being capable of popping out normally, and the false alarm of the differential pressure alarm 400 when the filter 10 is in a cold start can be prevented through the setting of the time delay device.
In one embodiment, as shown in fig. 2, the filter element 200 includes a support 210 and a filter layer 220, the support 210 includes an inner support 211 and an outer support 212 enclosing a cylinder, the outer support 212 is sleeved outside the inner support 211, and the filter layer 220 is embedded between the outer support 212 and the inner support 211.
The filter layer 220 is formed with a plurality of folds along the circumferential direction of the cross section, and a filter groove which is open outwards is formed between two adjacent folds, that is, the inner support 211 and the outer support 212 are structures for forming the folds of the filter layer 220 and keeping the folds at all times when in use, and the outer support 212 and the inner support 211 clamp the middle filter layer 220. The support structures are arranged on the two sides of the filter layer 220, so that flow surge, high differential pressure and resistance relative to flow resistance during cold start can be prevented, stability during high differential pressure and cold start is improved, and the service life of the filter element 200 is prolonged.
In one embodiment, the filter cartridge 200 further includes a wrapping 230, wherein the wrapping 230 is wound around the outer wall of the outer support 212, for example, a helical wrapping 230 is wound around the outer wall of the outer support 212, and the wrapping 230 wraps the outer support 212 to improve the stability and strength of the filter cartridge 200, thereby improving the dirt holding capacity and the service life of the filter cartridge 200.
In an embodiment, the pleats of the filtering layer 220 are uniformly distributed along the circumferential direction, the included angle between two adjacent pleats is equal, and the filter element 200 can uniformly filter pollutants, thereby improving the filtering effect.
In an embodiment, the two sides of each pleat are symmetrical with respect to the radial direction of the filter insert 200, i.e. the median plane of the pleats is parallel to the radial direction of the filter insert 200, the pleats radiating from the center to the periphery.
Rounded corners are provided at the corners of the filter layer 220, i.e. the joints at the two sides of the corners are smoothly transitioned.
In one embodiment, as shown in fig. 3, the filter layer 220 includes a plurality of first inorganic fiber strips 221, a plurality of second inorganic fiber strips 222, and a plurality of adhesive members 223, the plurality of first inorganic fiber strips 221 are disposed transversely, the plurality of second inorganic fiber strips 222 are disposed longitudinally, the first inorganic fiber strips 221 are parallel to each other, the second inorganic fiber strips 222 are parallel to each other, the first inorganic fiber strips 221 and the second inorganic fiber strips 222 are crossed to form a plurality of grids, each grid is substantially in a regular shape of a square, a diamond, etc., and all the second inorganic fiber strips 222 are located on the same side of the first inorganic fiber strips 221. Adhesive members 223 are bonded to the intersections of the first inorganic fiber strips 221 and the second inorganic fiber strips 222, and the adhesive members 223 are bonded to the grid nodes to fix the first inorganic fiber strips 221 and the second inorganic fiber strips 222 together.
The first inorganic fiber strips 221 and the second inorganic fiber strips 222 can be glass fiber strips, and the filter layer made of glass fibers is adopted, and the glass fibers are inorganic inert materials, so that the filter element has the advantages of good insulation property, good heat resistance, good corrosion resistance and high mechanical strength, and the service life of the filter element 200 can be effectively prolonged.
The cross-sectional area of the adhesive 223 is larger than the area at the nodes of the grid, i.e. the adhesive 223 completely covers the nodes. The setting of gluing piece 223 can increase the intensity of filter media, makes the life extension of filter media, has improved bearing capacity, has guaranteed the filterable stability of filter core 200 in the use, and the filter media that uses under the same pressure differential can still less to it has high pollutant carrying capacity.
In one embodiment, the cement 223 is a resin. For example, the adhesive member 223 is made of epoxy resin, which has the characteristics of high adhesive strength, small curing shrinkage rate, and stable chemical properties, and the first inorganic fiber strips 221 and the second inorganic fiber strips 222 are fixed by bonding with epoxy resin, so that the filter layer 220 is prevented from being damaged due to pressure, flow fluctuation, temperature, and aging.
In one embodiment, the supporting member 210 is a polymer supporting member with a mesh structure, and the supporting member 210 is made of polymer, so as to increase the service life thereof. For example, the high molecular weight polymer may be a composite of nylon and polyester.
In an embodiment, as shown in fig. 1 and 2, the filter element 200 further includes a cylindrical spindle 240, the spindle 240 is disposed in a space surrounded by the inner support 211, and a plurality of through holes 241 are opened on a sidewall of the spindle 240, so as to enable fluid communication between an upstream side and a downstream side of the filter layer 220. As shown in fig. 3, after entering the filter cartridge 100 from the inlet 101, the hydraulic fluid may pass through the outer support 212, enter the filter layer 220, flow out of the inner support 211, pass through the through hole 241, flow into the spindle 240, and then be discharged from the outlet 102. The through holes 241 are arranged in a matrix array, and the through holes 241 can be, but are not limited to, round holes; the mandrel 240 may be made of stainless steel or aluminum.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A filter for a million kilowatt nuclear power station is characterized in that: the anti-false alarm device comprises a filter cylinder, a filter element arranged in the filter cylinder, a bypass valve, a pressure difference alarm and an anti-false alarm connected with the pressure difference alarm; the pressure difference alarm is connected with the bypass valve, the pressure difference alarm is used for detecting the pressure difference at the two ends of the filter element so as to control the opening and closing of the bypass valve, and the false alarm preventing device is used for preventing false alarm of the pressure difference alarm when the filter is in cold start.
2. The filter for a million kilowatt class nuclear power plant according to claim 1, characterized in that: the pressure difference alarm is a visual pressure difference signal transmitter, and the false alarm preventer is a time delay device.
3. The filter for a million kilowatt class nuclear power plant according to claim 1, characterized in that: the filter core includes support piece and filter layer, support piece is including enclosing into cylindric interior support piece and outer support piece, outer support piece cover is located outside the interior support piece, the filter layer inlays to be located outer support layer with between the interior support piece, the filter layer is formed with a plurality of folds along its cross-sectional circumferencial direction, adjacent two form the outside filter tank of opening between the fold.
4. The filter for a million kilowatt class nuclear power plant according to claim 3, characterized in that: the folds are uniformly distributed along the circumferential direction.
5. The filter for a million kilowatt class nuclear power plant according to claim 3, characterized in that: the filter layer comprises a plurality of first inorganic fiber strips, a plurality of second inorganic fiber strips and a plurality of bonding parts, wherein the first inorganic fiber strips are arranged in parallel at intervals, the second inorganic fiber strips are arranged in parallel at intervals, the first inorganic fiber strips and the second inorganic fiber strips are crossed to form a plurality of grids, all the second inorganic fiber strips are positioned on the same side of the first inorganic fiber strips, and the bonding parts are bonded at nodes of the grids to bond the first inorganic fiber strips and the second inorganic fiber strips together.
6. The filter for a million kilowatt class nuclear power plant according to claim 5, characterized in that: the adhesive part is epoxy resin.
7. The filter for a million kilowatt class nuclear power plant according to claim 5, characterized in that: the first inorganic fiber strip and the second inorganic fiber strip are both glass fiber strips.
8. The filter for a million kilowatt class nuclear power plant according to claim 3, characterized in that: the support part is a high molecular polymer support part with a grid structure.
9. The filter for a million kilowatt class nuclear power plant according to claim 3, characterized in that: the filter core is characterized by further comprising a cylindrical mandrel, a plurality of through holes are formed in the side wall of the mandrel, and the mandrel is arranged in a space surrounded by the inner supporting piece.
10. The filter for a million kilowatt class nuclear power plant according to claim 3, characterized in that: the filter element also comprises a winding belt wound on the outer wall of the outer support piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920905088.XU CN210583982U (en) | 2019-06-14 | 2019-06-14 | Filter for million kilowatt nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920905088.XU CN210583982U (en) | 2019-06-14 | 2019-06-14 | Filter for million kilowatt nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210583982U true CN210583982U (en) | 2020-05-22 |
Family
ID=70719114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920905088.XU Active CN210583982U (en) | 2019-06-14 | 2019-06-14 | Filter for million kilowatt nuclear power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210583982U (en) |
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2019
- 2019-06-14 CN CN201920905088.XU patent/CN210583982U/en active Active
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