CN210271807U - Coolant hot section temperature measuring device and pressure vessel with same - Google Patents
Coolant hot section temperature measuring device and pressure vessel with same Download PDFInfo
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- CN210271807U CN210271807U CN201920778731.7U CN201920778731U CN210271807U CN 210271807 U CN210271807 U CN 210271807U CN 201920778731 U CN201920778731 U CN 201920778731U CN 210271807 U CN210271807 U CN 210271807U
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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 coolant hot section temperature measuring device for pressure vessel, survey buret including coolant annular, one side that coolant annular surveyed the buret distributes along its hoop has a plurality of coolant entry, and coolant annular surveys buret is equipped with the coolant outlet in the opposite side of a plurality of coolant entry dorsad, and the coolant gets into and flows out by the coolant outlet after the coolant annular surveys intraductal stirring of coolant annular via a plurality of coolant entries. The utility model also discloses a pressure container, including container body, coolant hot section temperature measuring device and temperature probe, coolant hot section temperature measuring device installs in the container body, coolant hot section temperature measuring device includes the coolant annular measuring pipe that is relative and close to setting up with interior sleeve pipe, and the coolant annular measuring pipe one side that dorsad goes away from interior sleeve pipe distributes along its hoop has a plurality of coolant inlets, and coolant annular measuring pipe is equipped with the coolant export towards one side of interior sleeve pipe; the temperature measuring probe corresponds to the coolant outlet.
Description
Technical Field
The utility model relates to a coolant hot section temperature measurement technical field especially relates to a coolant hot section temperature measuring device and have its pressure vessel.
Background
At present, temperature measurement signals of heat pipe sections of a coolant system of a large-scale decentralized arrangement pressurized water reactor (such as EPR) reactor need to be sent into a reactor control and protection system, direct insertion type measurement is adopted in a measurement method, namely, a temperature measurement thermal resistor is directly inserted into each heat pipe section, and due to the fact that coolant in a heat pipe section fully stirs and flows in a main pipeline with enough length, the measured coolant temperature can fully represent the temperature of the heat pipe section, measurement precision can meet certain requirements, and signals are accurate and reliable.
However, in the case of a reactor coolant system (for example, chinese utility model patent No. ZL 201721417210.6) using a compact arrangement, the main equipments are not connected to each other through a main pipe, but an inner and outer sleeve structure is used to connect the steam generator and the pressure vessel. The inner and outer sleeve structure can ensure that the reactor coolant system is arranged compactly enough, and the traditional main pipeline is cancelled.
The compact loop arrangement scheme cancels a hot section pipe, the temperature of the hot section cannot be measured by a method of directly inserting the hot section pipe, a bypass pipeline is led out from a descending section loop cavity of the steam generator, a temperature measuring thermal resistor is arranged on the bypass pipeline, and the led-out bypass pipeline can be newly returned to a reactor coolant system from a low-pressure position under the action of a main pump.
However, the measurement mode of the temperature of the hot section is additionally provided with a nuclear first-level valve, a pipeline and the like, so that the system is complex, and further, the reliability is low, and the construction cost is high; the coolant is easy to leak during the operation, the dosage rate of the unit is high, and the irradiation dosage of operators is high; meanwhile, the workload of maintenance, periodic test and in-service inspection is large, the operation cost is high, and enough maintenance and in-service inspection space may not exist; the handling of small LOCA accidents needs to be considered after the pipeline is cut, and the safety of the unit is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coolant hot section temperature measuring device can simplify the system architecture, improves reliability and reduction cost, and can not cause the coolant to leak, has improved the security of unit simultaneously.
Another object of the present invention is to provide a pressure vessel, which can simplify the system structure, improve the reliability and reduce the cost, and can not cause the leakage of the coolant, and improve the safety of the unit.
In order to realize the above-mentioned purpose, the utility model provides a coolant hot section temperature measuring device for pressure vessel, coolant hot section temperature measuring device includes coolant annular survey buret, one side of coolant annular survey buret distributes along its hoop has a plurality of coolant entries, coolant annular survey buret is in a plurality of dorsad the opposite side of coolant entry is equipped with the coolant outlet, and the coolant is via a plurality of coolant entry gets into coolant annular survey buret and in the coolant annular survey intraductal stirring of pipe is thoughtlessly back by the coolant outlet flows out.
Preferably, the coolant annular measurement pipe is annular.
Preferably, a plurality of said coolant inlets are equally spaced along said coolant annular measurement tube.
Preferably, the coolant hot section temperature measuring device further comprises a measuring channel, the measuring channel is fixedly connected to the coolant annular measuring tube, the measuring channel corresponds to the coolant outlet, and the measuring channel is configured to be inserted with a temperature measuring probe.
Preferably, the coolant hot section temperature measuring device further comprises a fixing rod fixedly connected to a position of the coolant annular measuring tube facing away from the measuring channel, and the fixing rod and the measuring channel are perpendicularly connected to the coolant annular measuring tube and are arranged substantially in a line.
In order to achieve the purpose, the utility model provides a pressure vessel, which comprises a vessel body, a coolant hot section temperature measuring device and a temperature measuring probe, wherein the vessel body is communicated with a steam generator through an inner sleeve and an outer sleeve; the coolant hot section temperature measuring device is arranged in the container body and comprises a coolant annular measuring tube which is opposite to the inner sleeve and is arranged close to the inner sleeve, a plurality of coolant inlets are distributed on one side of the coolant annular measuring tube, which is back to the inner sleeve, along the annular direction of the coolant annular measuring tube, a coolant outlet is arranged on one side of the coolant annular measuring tube, which faces the inner sleeve, and coolant enters the coolant annular measuring tube through the plurality of coolant inlets and flows out from the coolant outlet after being stirred and mixed in the coolant annular measuring tube; the temperature measuring probe extends into the container body from the top cover of the container body, and the detection end of the temperature measuring probe corresponds to the coolant outlet to detect the temperature of the coolant at the coolant outlet.
Preferably, the coolant hot section temperature measuring device further comprises a measuring channel fixedly connected to the coolant annular measuring tube, the measuring channel corresponding to the coolant outlet; the temperature measuring probe is inserted in the measuring channel.
Preferably, the container body has an upper support plate therein, and the measurement channel is fixed to the upper support plate in a penetrating manner.
Preferably, the coolant annular measuring pipe is circular, the measuring channel is vertically connected to the coolant annular measuring pipe, and the measuring channel is perpendicular to the top cover.
Preferably, the pressure vessel further comprises a fixing rod, one end of the fixing rod is fixedly connected to the coolant annular measuring pipe, and the other end of the fixing rod is fixedly connected to a core upper plate in the vessel body, and the core upper plate is located below the upper support plate.
Compared with the prior art, the utility model discloses a coolant hot section temperature measuring device is built-in at pressure vessel's container body when using, coolant annular survey buret is relative and be close to interior sleeve pipe setting, a plurality of coolant entry are interior sleeve pipe dorsad, coolant outlet is interior sleeve pipe towards, thereby make the coolant of co-altitude and direction not can get into coolant annular survey buret and flow out by coolant outlet after coolant annular survey intraductal stirring by a plurality of coolant entries, then flow out from interior sleeve pipe again, so can survey the coolant temperature in coolant outlet department through the temperature probe that corresponds the setting with coolant outlet, and the coolant temperature of surveying is balanced and utensil, can avoid near the interior sleeve pipe entry temperature distribution to have the problem that great gradient difference and the coolant temperature that causes can only represent the temperature of a certain position, thereby, the measurement requirements of a compact arrangement of the reactor coolant system can be achieved. Moreover, the utility model does not need to arrange bypass measuring pipelines, valves, instruments and other equipment, so that the system is simplified and the reliability is improved; moreover, the construction cost is reduced because no nuclear first-stage valve is added; meanwhile, no coolant leaks during operation, so that the dosage of a unit and operators cannot be increased; in addition, the workload of maintenance, periodic test and in-service inspection is effectively reduced, the running cost is reduced, and the situation that no enough maintenance and in-service inspection space exists is avoided; in addition, the pressure boundary of a primary circuit can be reduced, possible pipeline breakage is avoided, LOCA accidents do not need to be considered, and the safety of the unit is improved.
Drawings
Fig. 1 is a sectional view of a device for measuring the temperature of a hot section of a coolant according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a device for measuring the temperature of a hot section of a coolant according to an embodiment of the present invention, viewed from the opposite side of fig. 1.
Fig. 3 is a cross-sectional view of a pressure vessel according to an embodiment of the present invention.
Detailed Description
In order to explain the contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.
Please refer to fig. 1 and fig. 2, the utility model discloses a coolant hot section temperature measuring device 1 for pressure vessel, coolant hot section temperature measuring device 1 includes coolant annular survey pipe 10, one side of coolant annular survey pipe 10 distributes along its hoop has a plurality of coolant entry 11, coolant annular survey pipe 10 is equipped with coolant outlet 12 in the opposite side of a plurality of coolant entry 11 of dorsad, the coolant gets into coolant annular survey pipe 10 and flows out by coolant outlet 12 after stirring in coolant annular survey pipe 10 via a plurality of coolant entry 11. Typically, the plurality of coolant inlets 11 are small flow inlets and the coolant outlet 12 is a large flow outlet at a significantly greater flow rate than the small flow inlets.
In some embodiments, the coolant annular measurement tube 10 is annular, thereby facilitating smooth flow of coolant. Of course, the annular structure is only one of the preferred embodiments of the coolant annular measurement pipe 10, and other annular embodiments of the coolant annular measurement pipe 10 may be adopted as long as the coolant flows in the annular direction.
In some embodiments, a plurality of coolant inlets 11 are equally spaced along the coolant annular measurement tube 10; by this design, it is more advantageous to measure a more uniform and representative coolant temperature. Of course, the distribution of the coolant inlets 11 should not be limited to this specific scheme, as long as the distribution is satisfactory along the circumferential direction of the coolant annular measurement pipe 10 to measure a more uniform and representative coolant temperature than the single coolant inlet scheme, and the specific distribution rules and the number of the coolant inlets 11 are not limited.
In some embodiments, the number of the coolant outlets 12 is one, but is not limited to one, and two or more coolant outlets may be provided, as long as the coolant after being mixed can flow out from at least one coolant outlet 12.
In some embodiments, the coolant hot section temperature measuring device 1 further comprises a measuring channel 13, the measuring channel 13 is fixedly connected to the coolant annular measuring tube 10, the measuring channel 13 corresponds to the coolant outlet 12, and the measuring channel 13 is configured to be inserted with the temperature probe 2; through this design, be convenient for fix the position of temperature probe 2 in the position that corresponds with coolant export 12, also be convenient for fix coolant hot section temperature measuring device 1 through measuring channel 13 simultaneously. Preferably, the coolant annular measurement pipe 10 is annular, and the measurement channel 13 is vertically connected to a position of the coolant annular measurement pipe 10 corresponding to the coolant outlet 12; but not limited thereto.
In some embodiments, the coolant hot section temperature measuring device 1 further comprises a fixing rod 14, the fixing rod 14 is fixedly connected to a position of the coolant annular measuring pipe 10 facing away from the measuring channel 13, the fixing rod 14 and the measuring channel 13 are perpendicularly connected to the coolant annular measuring pipe 10 and are arranged substantially in a line; by this design, the fixing of the coolant hot leg temperature measuring device 1 by the fixing rod 14 and the measuring channel 13 is facilitated. Of course, the specific form, number and position of the fixing rods 14 connected to the coolant annular measuring pipe 10 are not limited as long as they can play a role of assisting in fixing the coolant hot section temperature measuring apparatus 1.
Referring to fig. 1 to 3, the present invention further discloses a pressure vessel, which comprises a vessel body 3, a coolant hot zone temperature measuring device 1 and a temperature measuring probe 2, wherein the vessel body 3 is communicated with a steam generator (not shown) through an inner sleeve 4 and an outer sleeve 5; the coolant hot section temperature measuring device 1 is arranged in the container body 3, the coolant hot section temperature measuring device 1 comprises a coolant annular measuring pipe 10 which is opposite to and close to the inner sleeve 4, a plurality of coolant inlets 11 are distributed on one side of the coolant annular measuring pipe 10, which is back to the inner sleeve 4, along the annular direction of the coolant annular measuring pipe, a coolant outlet 12 is arranged on one side of the coolant annular measuring pipe 10, which faces the inner sleeve 4, and the coolant enters the coolant annular measuring pipe 10 through the plurality of coolant inlets 11 and flows out from the coolant outlet 12 after being stirred and mixed in the coolant annular measuring pipe 10; the temperature measuring probe 2 extends into the container body 3 from the top cover 31 of the container body 3, and the detecting end of the temperature measuring probe 2 corresponds to the coolant outlet 12 to detect the temperature of the coolant at the coolant outlet 12.
In some embodiments, the number of temperature probes 2 and the number of coolant outlets 12 are both one. Of course, it is not limited thereto, for example, the number of the coolant outlets 12 may be one, and the number of the corresponding temperature probes 2 may be two or more; or the number of the coolant outlets 12 is two or more, and at least one temperature measuring probe 2 is correspondingly arranged at each coolant outlet 12; or the number of the coolant outlets 12 is two or more, and only part of the coolant outlets 12 are correspondingly provided with at least one temperature measuring probe 2.
In some embodiments, each of the thermometric probes 2 comprises two thermocouples, and the data measured by the two thermocouples can be averaged to obtain more balanced data, so as to prevent the loss of the thermometric function due to the failure of a single thermometric probe 2.
In some embodiments, the coolant hot section temperature measuring device 1 further comprises a measuring channel 13, the measuring channel 13 is fixedly connected to the coolant annular measuring tube 10, and the measuring channel 13 corresponds to the coolant outlet 12; the temperature measuring probe 2 is inserted in the measuring channel 13; through this design, be convenient for fix the position of temperature probe 2 in the position that corresponds with coolant export 12, also be convenient for fix coolant hot section temperature measuring device 1 through measuring channel 13 simultaneously.
In some embodiments, the container body 3 has an upper support plate 32 therein, and the measuring channel 13 is fixed to the upper support plate 32 through the upper support plate, thereby facilitating the fixing of the coolant hot section temperature measuring device 1. Specifically, the upper support plate 32 is provided with a guide tube seat (not shown) for fixing the measurement channel 13.
In some embodiments, the coolant annular measurement pipe 10 is annular, the measurement channel 13 is vertically connected to the coolant annular measurement pipe 10, and the measurement channel 13 is vertical to the top cover 31; so that the temperature measuring probe 2 can be vertically inserted into the measuring channel 13 connected to the uppermost part of the coolant annular measuring tube 10, and the stable installation of the coolant hot section temperature measuring device 1 is also facilitated. But should not restrict at this concrete scheme in the utility model discloses in, as long as temperature probe 2's detection end can be located the position that coolant outlet 12 corresponds can, temperature probe 2 also can bend so that correspond with coolant outlet 12.
In some embodiments, the pressure vessel further comprises a fixing rod 14, one end of the fixing rod 14 is fixedly connected to the coolant annular measuring pipe 10, the other end of the fixing rod 14 is fixedly connected to an upper core plate 33 in the vessel body 3, and the upper core plate 33 is located below the upper support plate 32; through this design, can carry out firm installation with coolant hot section temperature measuring device 1. Specifically, the core upper plate 33 is provided with a positioning fixture (not shown) fixedly connected to the fixing rod 14 so as to be stably coupled thereto. It should be noted that the specific form, number and position of the fixing rods 14 connected to the coolant annular measurement pipe 10 are not limited as long as they can function to assist in fixing the coolant hot section temperature measurement device 1.
In some embodiments, the two sides of the pressure vessel are respectively connected with a steam generator through the inner sleeve 4 and the outer sleeve 5, the coolant hot section temperature measuring devices 1 can be respectively arranged at the positions corresponding to the two inner sleeves 4, and the coolant temperatures obtained by the two groups of temperature measuring probes 2 can be averaged to participate in the control and protection of the reactor core.
From the above, the coolant hot section temperature measuring device 1 of the present invention is installed in the container body 3 of the pressure container when in use, the coolant annular measuring tube 10 is relatively and closely arranged to the inner sleeve 4, the plurality of coolant inlets 11 are back to the inner sleeve 4, the coolant outlet 12 is facing to the inner sleeve 4, so that the coolants with different heights and directions can enter the coolant annular measuring tube 10 through the plurality of coolant inlets 11 and flow out from the coolant outlet 12 after being stirred and mixed in the coolant annular measuring tube 10, and then flow out from the inner sleeve 4, so that the coolant temperature at the coolant outlet 12 can be detected through the temperature measuring probe 2 correspondingly arranged to the coolant outlet 12, and the measured coolant temperature is uniform and representative, and the problem that the coolant temperature caused by the large gradient difference existing near the inlet temperature distribution of the inner sleeve 4 can only represent the temperature of a certain position can be avoided, thereby, the measurement requirements of a compact arrangement of the reactor coolant system can be achieved. Moreover, the utility model does not need to arrange bypass measuring pipelines, valves, instruments and other equipment, so that the system is simplified and the reliability is improved; moreover, the construction cost is reduced because no nuclear first-stage valve is added; meanwhile, no coolant leaks during operation, so that the dosage of a unit and operators cannot be increased; in addition, the workload of maintenance, periodic test and in-service inspection is effectively reduced, the running cost is reduced, and the situation that no enough maintenance and in-service inspection space exists is avoided; in addition, the pressure boundary of a primary circuit can be reduced, possible pipeline breakage is avoided, LOCA accidents do not need to be considered, and the safety of the unit is improved.
The above disclosure is only a preferred embodiment of the present invention, and the function is to facilitate the understanding and implementation of the present invention, which is not to be construed as limiting the scope of the present invention, and therefore, the present invention is not limited to the claims.
Claims (10)
1. The utility model provides a coolant heat section temperature measuring device for pressure vessel, its characterized in that, coolant heat section temperature measuring device includes coolant annular measurement pipe, one side of coolant annular measurement pipe distributes along its hoop has a plurality of coolant entries, coolant annular measurement pipe is in a plurality of dorsad the opposite side of coolant entry is equipped with the coolant export, and the coolant is via a plurality of coolant entry gets into coolant annular measurement pipe and in coolant annular measurement pipe stir the back by the coolant export flows out.
2. The apparatus of claim 1 wherein the coolant annular measurement tube is annular.
3. The apparatus of claim 1, wherein a plurality of said coolant inlets are spaced equidistantly along said coolant annular measurement tube.
4. The apparatus of claim 1, further comprising a measurement channel fixedly connected to the coolant annular measurement tube, the measurement channel corresponding to the coolant outlet, the measurement channel configured to receive a temperature probe.
5. The apparatus of claim 4, further comprising a fixing bar fixedly attached to the annular coolant measurement tube at a location facing away from the measurement channel, the fixing bar and the measurement channel being perpendicularly attached to the annular coolant measurement tube and disposed substantially in line.
6. A pressure vessel, comprising:
the container body is communicated with the steam generator through the inner sleeve and the outer sleeve;
the temperature measuring device for the hot section of the coolant is arranged in the container body and comprises a coolant annular measuring pipe which is opposite to the inner sleeve and is arranged close to the inner sleeve, a plurality of coolant inlets are distributed on one side of the coolant annular measuring pipe, which is back to the inner sleeve, along the annular direction of the coolant annular measuring pipe, a coolant outlet is arranged on one side of the coolant annular measuring pipe, which faces the inner sleeve, and the coolant enters the coolant annular measuring pipe through the plurality of coolant inlets and flows out of the coolant outlet after being stirred and mixed in the coolant annular measuring pipe; and
the temperature measuring probe extends into the container body from the top cover of the container body, and the detection end of the temperature measuring probe corresponds to the coolant outlet so as to detect the temperature of the coolant at the coolant outlet.
7. The pressure vessel of claim 6, wherein the coolant hot leg temperature measurement device further comprises a measurement channel fixedly connected to the coolant annular measurement tube, the measurement channel corresponding to the coolant outlet; the temperature measuring probe is inserted in the measuring channel.
8. The pressure vessel of claim 7, wherein the vessel body has an upper support plate therein, and the measurement channel is fixedly inserted into the upper support plate.
9. The pressure vessel of claim 7, wherein said coolant annular measurement tube is annular, said measurement channel being vertically connected to said coolant annular measurement tube, said measurement channel being perpendicular to said top cover.
10. The pressure vessel of claim 8 further comprising a stationary rod having one end fixedly connected to the coolant annular measurement tube and another end fixedly connected to an upper core plate within the vessel body, the upper core plate being positioned below the upper support plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920778731.7U CN210271807U (en) | 2019-05-24 | 2019-05-24 | Coolant hot section temperature measuring device and pressure vessel with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920778731.7U CN210271807U (en) | 2019-05-24 | 2019-05-24 | Coolant hot section temperature measuring device and pressure vessel with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210271807U true CN210271807U (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920778731.7U Active CN210271807U (en) | 2019-05-24 | 2019-05-24 | Coolant hot section temperature measuring device and pressure vessel with same |
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| Country | Link |
|---|---|
| CN (1) | CN210271807U (en) |
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- 2019-05-24 CN CN201920778731.7U patent/CN210271807U/en active Active
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