CN204010700U - PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism - Google Patents
PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism Download PDFInfo
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- CN204010700U CN204010700U CN201420480095.7U CN201420480095U CN204010700U CN 204010700 U CN204010700 U CN 204010700U CN 201420480095 U CN201420480095 U CN 201420480095U CN 204010700 U CN204010700 U CN 204010700U
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- heating elements
- electrical heating
- sleeve pipe
- sealing block
- voltage stabilizer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model discloses a kind of PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism, comprise that lower end outer wall is provided with externally threaded electrical heating elements sleeve pipe, is threaded in the attaching nut of electrical heating elements sleeve pipe lower end and is welded on the sealing block on electrical heating elements; Electrical heating elements is through electrical heating elements sleeve pipe, and sealing block is positioned at electrical heating elements sleeve pipe below and is positioned at attaching nut; Between the top of sealing block and electrical heating elements sleeve bottom, be also provided with gasket seal.Electrical heating elements of the present utility model and electrical heating elements sleeve pipe formation removably connect, changing electrical heating elements only need pull down attaching nut, change the electrical heating elements that has welded sealing block, reduced installation difficulty and shortened the set-up time, sealing catch has guaranteed the sealing of electrical heating elements sleeve pipe, can effectively prevent refrigerant leaks, there is the advantages such as simple and compact for structure, easy to use, easy disassembling, good stability.
Description
Technical field
The utility model relates to compressed water reactor nuclear power plant, particularly, relates to a kind of PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism.
Background technology
PWR nuclear power plant voltage stabilizer bottom is provided with many electrical heating elements, electrical heating elements by be arranged on electrical heating elements sleeve pipe on lower seal head of voltage stabilizer enter voltage stabilizer and with electrical heating elements sleeve pipe between be connected, connecting portion is a circuit pressure border, requires very high.
In prior art, in PWR nuclear power plant between electrical heating elements and sleeve pipe by being welded to connect, in nuclear power plant's operational process, electrical heating elements is electric component, thereby may damage, needs to change and maintenance, welded structure between electrical heating elements and electrical heating elements sleeve pipe has been brought larger difficulty to its replacing, such as needs first cut, then finished edge, finally welds, need specialized equipment, and maintenance cycle is long.Because voltage stabilizer bottom radiation dose is very high, thereby brought larger difficulty to maintenance job.
Utility model content
Technical problem to be solved in the utility model is the above-mentioned deficiency that overcomes prior art, a kind of PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism is provided, this PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism can reduce the installation difficulty of voltage stabilizer electrical heating elements, facilitate the replacing of nuclear power plant's voltage stabilizer electrical heating elements, save the replacing time.
The technical scheme in the invention for solving the above technical problem is:
PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism, comprises the electrical heating elements sleeve pipe being arranged on lower seal head of voltage stabilizer, and this electrical heating elements sleeve pipe lower end outer wall is provided with external thread; Also comprise and be threaded in the attaching nut of electrical heating elements sleeve pipe lower end and be welded on the sealing block on electrical heating elements; Described electrical heating elements is through electrical heating elements sleeve pipe, and sealing block is positioned at electrical heating elements sleeve pipe below and is positioned at attaching nut; Between the top of sealing block and electrical heating elements sleeve bottom, be also provided with gasket seal.In this programme, electrical heating elements and electrical heating elements sleeve pipe no longer adopt and are welded to connect, but be connected by adopt again attaching nut that sealing block is compressed to the mode fixing with electrical heating elements sleeve pipe at welded seal block on electrical heating elements, make electrical heating elements and electrical heating elements form a kind of removably connecting, therefore the replacing of electrical heating elements is also very convenient, only need to pull down attaching nut, again change the electrical heating elements that has welded sealing block, because electrical heating elements welded seal block can complete in advance, nor with cutting, finished edge, while therefore changing electrical heating elements below voltage stabilizer, its installation difficulty reduces greatly, set-up time also shortens greatly, very convenient saving time.And sealing catch is pressed in electrical heating elements sleeve bottom, guaranteed the sealing of electrical heating elements sleeve pipe, can effectively prevent refrigerant leaks.
As further improvement of the utility model, above-mentioned PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism also comprises the snap close that is fixedly connected with nut, this snap close one end is welded on attaching nut, the other end is welded on electrical heating elements sleeve pipe, can prevent that attaching nut and interior fixing sealing block thereof, sealing catch from becoming flexible in operational process, the safety and stability of support equipment.
Further, above-mentioned snap close two ends are put respectively and are welded on nut and electrical heating elements sleeve pipe, snap close is connected and is not only easy to implement at the scene with the spot welding of nut and electrical heating elements, and in electrical heating elements Renewal process, be also easy to remove, when guaranteeing connective stability, avoided increase installation difficulty.
Further, above-mentioned electrical heating elements sleeve bottom or sealing block top are provided with the groove that holds gasket seal, make the position of gasket seal between electrical heating elements sleeve pipe and sealing block relatively fix, connect more stable.
Further, above-mentioned gasket seal is Graphite pad.
Further, above-mentioned gasket seal is expanded graphite pad.
Further, above-mentioned sealing block is circular; Above-mentioned attaching nut is vertically provided with two through holes that are communicated with up and down, in the through hole of top, be provided with the internal thread matching with the external thread of electrical heating elements sleeve pipe lower end outer wall, the through-hole diameter of below is more than or equal to the diameter of electrical heating elements but is less than the external diameter of sealing block, and above-mentioned sealing block and sealing catch are positioned at the through hole of attaching nut's top.
To sum up, the beneficial effects of the utility model are:
1, electrical heating elements of the present utility model adopts attaching nut that the sealing block compression mode fixing with electrical heating elements sleeve pipe is connected with electrical heating elements sleeve pipe by welded seal block on electrical heating elements again, make electrical heating elements and electrical heating elements form a kind of removably connecting, the replacing of electrical heating elements only need to be pulled down attaching nut, again change the electrical heating elements that has welded sealing block, because electrical heating elements welded seal block can complete in advance, nor with cutting, finished edge, when therefore below voltage stabilizer, electrical heating elements is changed at scene, its installation difficulty reduces greatly, set-up time also shortens greatly, very convenient saving time,
2, the utility model adopts sealing catch to be pressed in electrical heating elements sleeve bottom, has guaranteed the sealing of electrical heating elements sleeve pipe, can effectively prevent refrigerant leaks;
3, between the utility model attaching nut and electrical heating elements sleeve pipe, be connected with snap close, can prevent that the thread mechanism that attaching nut and interior fixing sealing block thereof, sealing catch etc. form from becoming flexible in operational process, the safety and stability of support equipment, and spot welding is connected snap close with electrical heating elements sleeve pipe with attaching nut, when guaranteeing stability, be easy to field conduct, be also convenient to remove.
4, simple and compact for structure, easy to use, the easy disassembling of the utility model, good stability.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is attaching nut and the enlarged drawing that is connected of electrical heating elements sleeve pipe, electrical heating elements.
Mark and corresponding parts title in accompanying drawing: 1-lower seal head of voltage stabilizer; 2-electrical heating elements sleeve pipe; 3-attaching nut; 4-seals catch; 5-sealing block; 6-snap close; 7-electrical heating elements.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but embodiment of the present utility model is not limited to this.
Embodiment 1:
As depicted in figs. 1 and 2, PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism, comprise lower end outer wall be provided with externally threaded electrical heating elements sleeve pipe 2, be threaded in electrical heating elements sleeve pipe 2 lower ends attaching nut 3, be welded on the sealing block 5 on electrical heating elements 7:
Described electrical heating elements sleeve pipe 2 is arranged on lower seal head of voltage stabilizer 1;
Described electrical heating elements 7 is through electrical heating elements sleeve pipe 2, and upper end is stretched in voltage stabilizer, and lower end is positioned at electrical heating elements sleeve pipe 2 belows.
Described sealing block 5 is for being circular, being welded on electrical heating elements 7 surroundings is that its inner peripheral surface and electrical heating elements 7 are welded to connect, sealing block 5 is positioned at electrical heating elements sleeve pipe 2 belows and is positioned at attaching nut 3, between its top and electrical heating elements sleeve pipe 2 bottoms, is also provided with a circle gasket seal 4;
In described attaching nut 3, be provided with electrical heating elements sleeve pipe 2 lower end outer walls and be provided with the internal thread that external thread matches, thereby make attaching nut 3 be threaded in electrical heating elements sleeve pipe 2 lower end outer walls, sealing block 5 and 4 through holes that are positioned at attaching nut 3 of sealing catch, in the process that attaching nut 3 screws on electrical heating elements sleeve pipe 2, sealing block 5 and sealing catch 4 are fixed in attaching nut 3 and are pressed on electrical heating elements sleeve pipe 2 bottoms, so not only fixed being connected of electrical heating elements 7 and electrical heating elements sleeve pipe 2, gasket seal 4 has also carried out excellent sealing to electrical heating elements sleeve pipe 2 bottoms, prevent refrigerant leaks.
In the present embodiment, electrical heating elements 7 and electrical heating elements sleeve pipe 2 are changed the mode that available technology adopting is welded to connect, and on electrical heating elements 7 welded seal block 5, adopt again attaching nut 3 that sealing block 5 is pressed on to electrical heating elements sleeve pipe 2 bottoms, make electrical heating elements 7 and electrical heating elements sleeve pipe 2 form a kind of removably connecting.
While changing electrical heating elements 2, electrical heating elements 2 is welded seal block 5 first, and this step can complete in advance, needn't carry out at voltage stabilizer scene, even can first the upper sealing block 5 of a plurality of electrical heating elements 2 welding be made to stand-by storage; On-the-spot at voltage stabilizer, first pull down attaching nut 3, take out old electrical heating elements 2, if taking off gasket seal 4(gasket seal 4 is fixed on electrical heating elements sleeve pipe 2 bottoms and also can takes off gasket seal 4) be installed on the sealing block 5 of new electrical heating elements 2 to be changed, finally install new electrical heating elements 2 and screw attaching nut 3.Scene need not be cut, finished edge, and the installation difficulty while changing electrical heating elements 2 like this reduces greatly, the set-up time also dwindles greatly, very convenient saving time.Sealing catch 4 is pressed in electrical heating elements sleeve pipe 2 bottoms, and its effect is the sealing that guarantees electrical heating elements sleeve pipe 2, prevents refrigerant leaks.
Embodiment 2:
On the basis of embodiment 1, loosening in operational process in order to prevent attaching nut 3 and interior fixing electrical heating elements 7 thereof, sealing block 5, gasket seal 4, in the present embodiment, set up a kind of mechanism of connection of reinforce the connection nut and electrical heating elements sleeve pipe 2, particularly: set up a snap close 6, these snap close 6 one end are welded on attaching nut 3, and the other end is welded on electrical heating elements sleeve pipe 2, prevent the loosening of attaching nut's 3 helicitic textures such as grade in operational process.For ease of later stage dismounting, between this snap close 6 and electrical heating elements sleeve pipe 2 and attaching nut 3, by spot welding, to fix, this spot welding is easy to implement at the scene, and in electrical heating elements 7 Renewal process, is also easy to remove.
Embodiment 3:
On the basis of embodiment 1 or embodiment 2, in order to make gasket seal 4 connect more stablely between electrical heating elements sleeve pipe 2 and sealing block 5, described electrical heating elements sleeve pipe 2 bottoms or sealing block 5 tops are provided with the groove that a circle holds gasket seal 4, and gasket seal 4 is just limited in this groove.Aforementioned gasket seal 4 adopts expanded graphite pad, and electrical heating elements sleeve pipe 2 bottoms are sealed, and prevents the leakage of cooling medium.Practical application, gasket seal 4 also can adopt other common pads for sealing, with sealed electrical heating element sleeve pipe 2 bottoms.
Embodiment 4:
On above-mentioned arbitrary embodiment basis, in the present embodiment, attaching nut 3 is further limited, described attaching nut 3 is vertically provided with two through holes that are communicated with up and down, in the through hole of top, be provided with the internal thread matching with the external thread of electrical heating elements sleeve pipe 2 lower end outer walls, to be connected with electrical heating elements sleeve pipe 2 lower end outer wall threads; The through-hole diameter of attaching nut 3 below is more than or equal to the diameter of electrical heating elements 7 but is less than the external diameter of sealing block 5, makes electrical heating elements 7 can pass this through hole, but sealing block 5 is stuck in this through hole top; Thereby sealing block 5 and sealing catch 4 are limited in attaching nut 3 the through hole of top.Like this, attaching nut 3 bottoms are stuck in sealing block 5 belows, when attaching nut 3 upwards screws, sealing block 5, sealing catch 4 are upwards pressed on to electrical heating elements sleeve pipe 2 bottoms.
Below be only preferred implementation of the present utility model, protection domain of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, the some improvements and modifications not departing under the utility model principle prerequisite, should be considered as protection domain of the present utility model.
Claims (7)
1. PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism, comprises the electrical heating elements sleeve pipe (2) being arranged on lower seal head of voltage stabilizer (1), it is characterized in that,
Described electrical heating elements sleeve pipe (2) lower end outer wall is provided with external thread;
Also comprise and be threaded in the attaching nut (3) of electrical heating elements sleeve pipe (2) lower end and be welded on the sealing block (5) on electrical heating elements (7);
Described electrical heating elements (7) is through electrical heating elements sleeve pipe (2), and sealing block (5) is positioned at electrical heating elements sleeve pipe (2) below and is positioned at attaching nut (3); Between the top of sealing block (5) and electrical heating elements sleeve pipe (2) bottom, be also provided with gasket seal (4).
2. PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism according to claim 1, it is characterized in that, also comprise the snap close (6) that is fixedly connected with nut (3), it is upper that this snap close (6) one end is welded on attaching nut (3), and the other end is welded on electrical heating elements sleeve pipe (2).
3. PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism according to claim 2, is characterized in that, described snap close (6) two ends are put respectively and are welded on nut (3) and electrical heating elements sleeve pipe (2).
4. according to the arbitrary described PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism of claims 1 to 3, it is characterized in that, described electrical heating elements sleeve pipe (2) bottom or sealing block (5) top are provided with the groove that holds gasket seal (4).
5. according to the arbitrary described PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism of claims 1 to 3, it is characterized in that, described gasket seal (4) is Graphite pad.
6. PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism according to claim 5, is characterized in that, described gasket seal (4) is expanded graphite pad.
7. according to the arbitrary described PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism of claims 1 to 3, it is characterized in that, described sealing block (4) is circular; Described attaching nut (3) is vertically provided with two through holes that are communicated with up and down, in the through hole of top, be provided with the internal thread matching with the external thread of electrical heating elements sleeve pipe (2) lower end outer wall, the diameter of through hole of below is more than or equal to the diameter of electrical heating elements (7) but is less than the external diameter of sealing block (5), described sealing block (5) and sealing in the through hole of top that catch (4) is located at attaching nut (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420480095.7U CN204010700U (en) | 2014-08-25 | 2014-08-25 | PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420480095.7U CN204010700U (en) | 2014-08-25 | 2014-08-25 | PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism |
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| CN204010700U true CN204010700U (en) | 2014-12-10 |
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| CN201420480095.7U Active CN204010700U (en) | 2014-08-25 | 2014-08-25 | PWR nuclear power plant voltage stabilizer electrical heating elements installing mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114242276A (en) * | 2021-12-17 | 2022-03-25 | 中国核动力研究设计院 | Detachable heating structure applied to pressure container and installation method thereof |
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2014
- 2014-08-25 CN CN201420480095.7U patent/CN204010700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114242276A (en) * | 2021-12-17 | 2022-03-25 | 中国核动力研究设计院 | Detachable heating structure applied to pressure container and installation method thereof |
| CN114242276B (en) * | 2021-12-17 | 2024-02-23 | 中国核动力研究设计院 | Detachable heating structure applied to pressure vessel and installation method thereof |
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