CN210572771U - Ionization chamber radiation detector for accident and after accident - Google Patents
Ionization chamber radiation detector for accident and after accident Download PDFInfo
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- CN210572771U CN210572771U CN201921402250.2U CN201921402250U CN210572771U CN 210572771 U CN210572771 U CN 210572771U CN 201921402250 U CN201921402250 U CN 201921402250U CN 210572771 U CN210572771 U CN 210572771U
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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 an accident and use ionization chamber radiation detector after the accident, be in including outer protection section of thick bamboo, interior ionization chamber and setting outer protection section of thick bamboo outer and with the inorganic armoured cable that interior ionization chamber is connected, outer protection section of thick bamboo include lid behind urceolus, urceolus protecgulum and the urceolus, and the rear end of lid is provided with the gas tube behind the urceolus, and interior ionization chamber includes high-voltage pole and collector, and inorganic armoured cable includes two armoured cables, and armoured cable's both ends all are provided with the armoured cable head. The utility model discloses ionization chamber radiation detector internal insulation all adopts ceramic insulation, and an outer protection section of thick bamboo, interior ionization chamber and inorganic armoured cable all adopt welded seal, and the environment of adaptation high temperature, high pressure, high humidity, high irradiation and acid and alkali resistance uses, and the insulating extension of end of armoured cable is protected well armoured cable end simultaneously to the destruction of armoured cable end to high temperature welding simultaneously insulating, easily just further improved the intensity of armoured cable heart yearn to armoured cable's secondary operation.
Description
Technical Field
The utility model belongs to the technical field of ionization chamber radiation detection, concretely relates to accident and use ionization chamber radiation detector behind the accident.
Background
The detector is mainly used for monitoring gamma radiation absorption dose rate in a nuclear reactor of a nuclear power station under normal conditions and during a loss of coolant accident or a coolant leakage accident, ionizing radiation is measured by using an ionization effect, ionizing radiation generates ionizing ion pairs in a medium, and positive and negative ions drift towards a negative electrode and a positive electrode respectively under the action of an electric field to form ionizing current. Since the ionization current is proportional to the intensity of the radiation, measuring this current yields the intensity of the ionizing radiation. Because the equipment runs in a nuclear reactor for a long time, the equipment needs to work in the environments of high temperature, high humidity, high radiation and acid and alkali resistance, and the development technology has great difficulty. In addition, the performance of the radiation detector of the ionization chamber depends on the signal transmission of the cable, the existing radiation detector of the ionization chamber mostly adopts the armored cable to carry out the voltage transmission and the current signal acquisition, but as for the armored cable, the short-circuit fault of the cable is caused by the following reasons: when the cable is connected, the connection link of the cable end is weak, the connection process of the cable end does not meet the quality requirement, the insulation of the end is treated, moisture is not allowed to enter a key connection part, and the insulation of the key connection part is prevented from being influenced. When monitoring the radiation detector of the ionization chamber after nuclear accidents and accidents, in order to ensure that the detector works in the environment of high temperature, high humidity, high pressure and high irradiation, the packaging mode of the end of the existing armored cable is finished in a bonding mode when leaving the factory, and the mode can not carry out high-temperature welding and is difficult to effectively transmit signals collected by the radiation detector of the ionization chamber.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide an accident and an ionization chamber radiation detector after the accident, aiming at the defects in the prior art, the design is novel and reasonable, the internal insulation of the ionization chamber radiation detector is ceramic insulation, the detector is suitable for the use in high temperature, high pressure, high irradiation and acid and alkali resistance environment, the external protection cylinder, the internal ionization chamber and the inorganic armored cable are all welded and sealed, the detector is suitable for the use in high humidity environment, the internal ionization chamber is arranged in the external protection cylinder through a damping spring, so that the detector can resist various impacts under the accident condition, meanwhile, the inorganic armored cable prolongs the end insulation of the armored cable, the high temperature welding between the armored cable and the connecting part is realized, the damage to the end of the armored cable by the high temperature welding is avoided, the end insulation of the armored cable is well protected, the secondary processing of the armored cable is easy, and the strength of the armored cable core, is convenient for popularization and use.
In order to solve the technical problem, the utility model discloses a technical scheme is: the ionization chamber radiation detector is used after the accident and the accident, which is characterized in that: the cable protection device comprises an outer protection barrel, an inner ionization chamber arranged in the outer protection barrel and an inorganic armored cable which is arranged outside the outer protection barrel and connected with the inner ionization chamber, wherein the outer protection barrel comprises an outer barrel, an outer barrel front cover and an outer barrel rear cover which are hermetically matched with the outer barrel, two wire outlet pipes are arranged at the front end of the outer barrel front cover, a protection sleeve is arranged on the front side of the outer barrel front cover, two through holes which are respectively matched with the two wire outlet pipes are formed in the protection sleeve, a front gland with a hollow structure is sleeved outside the protection sleeve, an inflation pipe is arranged at the rear end of the outer barrel rear cover, and a rear cover for sealing the inflation pipe is arranged outside the outer barrel rear cover;
the inner ionization chamber comprises a high-voltage electrode and a collector which are of tubular structures, the collector is arranged in the high-voltage electrode and is coaxially arranged with the high-voltage electrode, an inflation tube is communicated with the inner ionization chamber, working gas enters the inner ionization chamber through the inflation tube, the front ends of the collector and the high-voltage electrode are connected through an inner compression ring, a cable connector of the high-voltage electrode and a cable connector of the collector are both arranged in the inner compression ring, first ceramic insulators are arranged at the contact positions of the cable connector of the high-voltage electrode and the cable connector of the collector and the inner compression ring, the rear ends of the collector and the high-voltage electrode are connected through a rear compression ring, second ceramic insulators are arranged at the connection positions of the collector and the high-voltage electrode and the rear compression ring, the rear end of the rear compression ring is connected with an outer cylinder through a damping spring, the inner compression ring is connected with a baffle of a hollow structure, two first cable sockets penetrate through a hollow area of the baffle, a, the cable joint of the collector is connected with the bottom end of the other first cable socket, and the two first cable sockets are fixedly connected with the baffle through a third ceramic insulator;
inorganic armoured cable includes that two pass preceding gland in proper order, protective sheath and urceolus protecgulum respectively with two first cable socket complex armoured cables, the one end that first cable socket was kept away from to the armoured cable is connected with second cable socket, the both ends of armoured cable all are provided with the armoured cable head, the one end that the armoured cable is close to first cable socket is passed through armoured cable head and first cable socket cooperation, the armoured cable is kept away from one of first cable socket and is served outward and be provided with the female head of cable socket outside the armoured cable head, second cable socket be provided with outward with the female head complex cable socket male head of cable socket.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: the armoured cable head includes the ceramic insulator cap of suit at the armoured cable end, the ceramic insulator cap that the ceramic insulator cap includes hollow structure and the ceramic insulator tube with the integrative intercommunication of ceramic insulator cap, the internal diameter of ceramic insulator tube equals with the heart yearn external diameter of armoured cable, the external diameter of ceramic insulator tube equals with the external diameter of armoured cable, the external diameter of ceramic insulator tube is less than the external diameter of ceramic insulator cap, the heart yearn of armoured cable stretches into to ceramic insulator intraductal, the cover is equipped with outer protective sheath on the armoured cable, an pot head of outer protective sheath is established on ceramic insulator tube and with ceramic insulator cap butt, the one end that ceramic insulator cap kept away from ceramic insulator tube is provided with interior protective sheath, the internal diameter of ceramic insulator cap equals with the internal diameter of interior protective sheath, the heart yearn of armoured cable passes ceramic.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: the outer diameter of the outer protective sleeve is equal to that of the ceramic insulating cap; the length of the outer protective sleeve is greater than that of the ceramic insulating tube;
the shell of the armored cable is connected with the outer protective sleeve in a brazing mode, and the outer protective sleeve is connected with the shell of the ceramic insulating tube in a fusion sealing welding mode;
the inner protective sleeve is connected with the ceramic insulating cap in a fusion sealing welding mode; the inner protective sleeve and the outer protective sleeve are in open circuit, and the insulation resistance between the inner protective sleeve and the outer protective sleeve is not less than 1015Ω；
The length of the ceramic insulating cap is L, and the value range of L is 0.5 cm-1.5 cm;
the inner protective sleeve is a stainless steel inner protective sleeve, and the outer protective sleeve is a stainless steel outer protective sleeve.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: and a sliding sleeve matched with the female head of the cable socket is arranged on a cable section between the two armored cable seal heads on the armored cable.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: and an annular supporting plate matched with the inner wall of the outer barrel is arranged on the outer edge of the baffle.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: and an active support is arranged on the high-voltage electrode.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: the front end of the baffle is provided with a front pressing ring of a hollow structure, an external thread is arranged outside the front pressing ring, an internal thread matched with the external thread is arranged at the front end of the outer barrel, and the front pressing ring and the baffle are coaxially arranged.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: the high-pressure pole is the tubular high-pressure pole, and the collecting pole is the tubular collector, interior clamping ring is annular interior clamping ring, the protection ring is annular protection ring, and the backup pad is the annular backup pad, and the external diameter of backup pad, protection ring and interior clamping ring equals, and the external diameter of interior clamping ring is greater than the external diameter of high-pressure pole.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: the baffle, the support plate, the protection ring, the inner compression ring, the high-voltage electrode, the collector and the rear compression ring are all made of aluminum products; the front gland, the protective sleeve, the outer cylinder front cover, the outer cylinder rear cover, the inflation tube and the rear cover are all stainless steel products.
The above-mentioned accident and after-accident ionization chamber radiation detector is characterized in that: the working gas is argon and nitrogen.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses ionization chamber radiation detector internal insulation all adopts ceramic insulation, and the environment of adaptation high temperature, high pressure, high irradiation and acid and alkali resistance is used, and the electrification performance change can be ignored under the accident condition, and an outer protection section of thick bamboo, interior ionization chamber and inorganic armoured cable all adopt welded seal, and the environment that the adaptation is high wet is used, convenient to popularize and use.
2. The utility model discloses interior ionization chamber passes through damping spring and sets up in an outer protection section of thick bamboo, makes the detector can tolerate various impact under the accident condition, and the clamping ring is impressed an outer protection section of thick bamboo with interior ionization chamber before the utilization, avoids interior ionization chamber to vibrate in an outer protection section of thick bamboo.
3. The utility model discloses a suit ceramic insulator sleeve at the armoured cable end, realize the end insulation extension of armoured cable, realize the high temperature welding between armoured cable and the adapting unit, avoid high temperature welding to damage the armoured cable end and protect well the armoured cable end insulation simultaneously, easily to the secondary operation of armoured cable; the armored cable is sleeved with the outer protective sleeve, so that the end head structure of the armored cable is fixed while the end head of the armored cable is protected, the weakness of the wiring link of the end head of the armored cable is improved, and the strength of the end head of the armored cable is improved; the protective sheath in the one end setting that ceramic insulating tube was kept away from to the ceramic insulator cap at ceramic insulating sleeve improves armoured cable core wire wiring link weak, has improved armoured cable core wire's joint strength, and the armoured cable of being convenient for is connected with other parts, and is reliable stable, excellent in use effect.
4. The utility model relates to a novel reasonable, an outer protection section of thick bamboo adopts the stainless steel goods, and interior ionization chamber adopts the aluminium products, when surveying gamma radiation, has very good measurement linearity and energy response.
To sum up, the utility model relates to a novel reasonable, ionization chamber radiation detector internal insulation all adopts ceramic insulation, adapt to high temperature, high pressure, the environment of high irradiation and acid and alkali resistance is used, an outer protection section of thick bamboo, interior ionization chamber and inorganic armoured cable all adopt welded seal, adapt to high humid environment and use, interior ionization chamber passes through damping spring and sets up in an outer protection section of thick bamboo, make the detector can tolerate various impact under the accident condition, inorganic armoured cable prolongs armoured cable's end insulation simultaneously, realize the high temperature welding between armoured cable and the adapting unit, it is insulating to protect armoured cable end simultaneously to avoid high temperature welding to destroy armoured cable end, easily to armoured cable's secondary operation and further improved the intensity of armoured cable heart yearn, convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the structure of fig. 1 except for the second cable receptacle and the sliding sleeve.
Fig. 3 is a schematic view of the connection relationship between the internal ionization chamber and the second cable socket.
Fig. 4 is the utility model discloses the structure schematic diagram of armoured cable and armoured cable head.
Fig. 5 is a schematic structural diagram of the ceramic insulating sleeve of the present invention.
Fig. 6 is the utility model discloses the assembly schematic diagram of armoured cable and armoured cable head.
Description of reference numerals:
1-armored cable; 2, armouring a cable head; 2-1-inner protective sleeve;
2-ceramic insulating sleeve; 2-2-1-ceramic insulating cap; 2-2-2-ceramic insulating tube;
2-3-outer protective sleeve; 3, sliding sleeve; 4, pressing a ring in front;
5-a first cable socket; 6-third ceramic insulator; 7, a baffle plate;
8, a support plate; 9-a guard ring; 10, an inner compression ring;
11-a first ceramic insulator; 12-source holder; 13-a collector;
14-high voltage pole; 15-rear compression ring; 16-a damping spring;
17-a second ceramic insulator; 18-front gland; 19-protective sleeve;
20-outer cylinder front cover; 21-outer cylinder; 22-outer cylinder rear cover;
23-a gas-filled tube; 24-rear cover; 25-cable socket male;
26-cable socket female; 27 — second cable socket.
Detailed Description
As shown in fig. 1 to 3, the present invention includes an outer protection cylinder, an inner ionization chamber disposed in the outer protection cylinder, and an inorganic armored cable disposed outside the outer protection cylinder and connected to the inner ionization chamber, wherein the outer protection cylinder includes an outer cylinder 21, and an outer cylinder front cover 20 and an outer cylinder rear cover 22 both hermetically fitted with the outer cylinder 21, the front end of the outer cylinder front cover 20 is provided with two outlet pipes, the front side of the outer cylinder front cover 20 is provided with a protection sleeve 19, the protection sleeve 19 is provided with two through holes respectively fitted with the two outlet pipes, the protection sleeve 19 is sleeved with a hollow front gland 18, the rear end of the outer cylinder rear cover 22 is provided with an inflation pipe 23, and the outer cylinder rear cover 22 is externally provided with a rear cover 24 for sealing the inflation pipe 23;
the inner ionization chamber comprises a high-voltage electrode 14 and a collector 13 which are both tubular structures, the collector 13 is arranged in the high-voltage electrode 14 and is coaxially arranged with the high-voltage electrode 14, an inflation tube 23 is communicated with the inner ionization chamber, working gas enters the inner ionization chamber through the inflation tube 23, the front ends of the collector 13 and the high-voltage electrode 14 are connected through an inner compression ring 10, a cable joint of the high-voltage electrode 14 and a cable joint of the collector 13 are both arranged in the inner compression ring 10, cable joints of the high-voltage electrode 14 and a cable joint of the collector 13 are both provided with a first ceramic insulator 11 at the contact position with the inner compression ring 10, the rear ends of the collector 13 and the high-voltage electrode 14 are connected through a rear compression ring 15, the connection positions of the collector 13 and the high-voltage electrode 14 with the rear compression ring 15 are provided with a second ceramic insulator 17, the rear end of the rear compression ring 15 is connected with an outer cylinder 21 through a damping spring 16, the inner compression, the two first cable sockets 5 penetrate through the hollow area of the baffle 7, the cable joint of the high-voltage pole 14 is connected with the bottom end of one first cable socket 5, the cable joint of the collector 13 is connected with the bottom end of the other first cable socket 5, and the two first cable sockets 5 are fixedly connected with the baffle 7 through the third ceramic insulator 6;
inorganic armoured cable includes that two pass preceding gland 18 in proper order, protective sheath 19 and urceolus protecgulum 20 respectively with two first cable socket 5 complex armoured cable 1, armoured cable 1 keeps away from the one end of first cable socket 5 and is connected with second cable socket 27, armoured cable 1's both ends all are provided with armoured cable head 2, armoured cable 1 is close to the one end of first cable socket 5 and passes through armoured cable head 2 and the cooperation of first cable socket 5, armoured cable 1 keeps away from one of first cable socket 5 and serves the external female head 26 of cable socket that is provided with of armoured cable 2, second cable socket 27 is provided with the public head 25 of cable socket with the female head 26 complex of cable socket outward.
It should be noted that two outlet pipes are arranged at the front end of the outer cylinder front cover 20, two through holes matched with the two outlet pipes are formed in the protective sleeve 19, so that a cable socket can conveniently extend out, the outer cylinder 21, the outer cylinder front cover 20, the protective sleeve 19 and the front gland 18 are sealed by welding, the rear end of the outer cylinder rear cover 22 is provided with an inflation pipe 23, the inflation pipe 23 is welded on the outer cylinder rear cover 22, the collector 13 is subjected to leak detection and inflation through the inflation pipe 23, when the sealing effect of the inner ionization chamber meets the requirement, working gas is filled into the collector 13 through the inflation pipe 23, and the inflation pipe 23 is sealed by welding after the working gas is filled; the collector 13 is arranged in the high-voltage pole 14 and is coaxially arranged with the high-voltage pole 14, so that an electric field loaded on the high-voltage pole 14 can ionize working gas in the collector 13 conveniently, the collector 13 is of a tubular structure and has good ionization current collecting capacity, the two ends of the high-voltage pole 14 and the collector 13 are fixed by the inner pressing ring 10 and the rear pressing ring 15, the inner pressing ring 10 is connected with the baffle 7 of a hollow structure through the protection ring 9, the inner pressing ring 10 and the protection ring 9 support the high-voltage pole 14 and the collector 13 and simultaneously provide an installation foundation for a cable connector of the high-voltage pole 14 and a cable connector of the collector 13, the contact positions of the cable connector of the high-voltage pole 14 and the cable connector of the collector 13 and the inner pressing ring 10 are both provided with the first ceramic insulators 11, and the contact positions of the cable connector of the high-voltage pole 14 and the cable connector of the collector 13 and the protection ring 9, the ionization chamber radiation detector internal insulation all adopts ceramic insulation, adapt to the environment use of high temperature, high pressure, high irradiation and acid and alkali resistance, the electrification performance change can be ignored under the accident condition, outer protection section of thick bamboo, interior ionization chamber and inorganic armoured cable all adopt welded seal, adapt to the environment use of high humidity, the purpose of being connected through damping spring 16 between rear clamping ring 15 rear end and the urceolus 21 is to make interior ionization chamber pass through damping spring and set up in outer protection section of thick bamboo, make the detector can bear various impact under the accident condition.
In actual use, the two ends of the armored cable 1 are provided with the armored cable seal heads 2, so that the stability of signal transmission is ensured, and the stability of remote data transmission in a radiation environment is ensured.
As shown in fig. 4 to 6, in this embodiment, the armored cable head 2 includes a ceramic insulating sleeve 2-2 sleeved on an end of the armored cable 1, the ceramic insulating sleeve 2-2 includes a ceramic insulating cap 2-2-1 with a hollow structure and a ceramic insulating tube 2-2-2 integrally communicated with the ceramic insulating cap 2-2-1, an inner diameter of the ceramic insulating tube 2-2-2 is equal to an outer diameter of a core wire of the armored cable 1, an outer diameter of the ceramic insulating tube 2-2-2 is equal to an outer diameter of the armored cable 1, an outer diameter of the ceramic insulating tube 2-2-2 is smaller than an outer diameter of the ceramic insulating cap 2-2-1, the core wire of the armored cable 1 extends into the ceramic insulating tube 2-2-2, the armored cable 1 is sleeved with an outer protective sleeve 2-3, one end of the outer protective sleeve 2-3 is sleeved on the ceramic insulating tube 2-2-2 and is abutted against the ceramic insulating cap 2-2-1, the end, far away from the ceramic insulating tube 2-2-2, of the ceramic insulating cap 2-2-1 is provided with the inner protective sleeve 2-1, the inner diameter of the ceramic insulating cap 2-2-1 is equal to that of the inner protective sleeve 2-1, and a core wire of the armored cable 1 penetrates through the ceramic insulating cap 2-2-1 and is connected with the inner protective sleeve 2-1 in a compression joint mode.
It should be noted that the end of the armored cable 1 is sleeved with the ceramic insulating sleeve 2-2 to realize the end insulation extension of the armored cable 1, realize the high temperature welding between the armored cable 1 and the connecting part, avoid the end of the armored cable 1 from being damaged by the high temperature welding, simultaneously protect the end insulation of the armored cable 1, and easily perform the secondary processing on the armored cable 1, the armored cable 1 is sleeved with the outer protective sleeve 2-3 to protect the end of the armored cable 1 and fix the end structure of the armored cable 1, improve the end connection link weakness of the armored cable 1, improve the end strength of the armored cable 1, be reliable and stable, have good use effect, the end of the ceramic insulating cap 2-2-1 of the ceramic insulating sleeve 2-2 far away from the ceramic insulating tube 2-2-2 is provided with the inner protective sleeve 2-1 to improve the connection link weakness of the armored cable core wire, the connection strength of the core wires of the armored cable is improved, the armored cable 1 is convenient to connect with other components, and the practicability is high.
In practice, the purpose that the inner diameter of the ceramic insulating tube 2-2-2 is equal to the outer diameter of the armored cable 1 is to facilitate the armored cable 1 to extend into the ceramic insulating tube 2-2-2 and not to be extruded, so that the armored cable 1 is prevented from being extruded to generate heat, and the armored cable 1 is prevented from being damaged; and secondly, the abrasion of the end of the armored cable 1 caused by the shaking of the armored cable 1 in the ceramic insulating tube 2-2-2 due to the overlarge inner diameter of the ceramic insulating tube 2-2-2 is avoided, and the service life of the armored cable 1 is shortened.
In practice, the purpose that the outer diameter of the ceramic insulating tube 2-2-2 is smaller than the outer diameter of the ceramic insulating cap 2-2-1 is to facilitate a sleeve of the outer protective sleeve 2-3 to be sleeved on the ceramic insulating tube 2-2-2 and abutted against the ceramic insulating cap 2-2-1, so that the installation position of the outer protective sleeve 2-3 is limited, the outer protective sleeve 2-3 is prevented from penetrating through the ceramic insulating cap 2-2-1, the insulation resistance between the outer protective sleeve 2-3 and the inner protective sleeve 2-1 is reduced, and the ceramic insulating sleeve 2-2 cannot effectively insulate the inner protective sleeve 2-1 and the outer protective sleeve 2-3.
In practice, the purpose that the inner diameter of the ceramic insulating cap 2-2-1 is equal to the inner diameter of the inner protective sleeve 2-1 is to facilitate the armored cable core wire to extend into the inner protective sleeve 2-1, and avoid the inner diameter of the inner protective sleeve 2-1 from being too large, so that the armored cable core wire is shaken in the inner protective sleeve 2-1 to wear the armored cable core wire, the service life of the armored cable 1 is shortened, and meanwhile, the influence on the signal transmission efficiency and the signal transmission stability caused by too large gap when the armored cable core wire is connected with other components is avoided.
In the embodiment, the outer diameter of the outer protective sleeve 2-3 is equal to the outer diameter of the ceramic insulating cap 2-2-1; the length of the outer protective sleeve 2-3 is greater than that of the ceramic insulating tube 2-2-2;
the shell of the armored cable 1 is connected with the outer protective sleeve 2-3 in a brazing mode, and the outer protective sleeve 2-3 is connected with the shell of the ceramic insulating tube 2-2-2 in a fusion sealing welding mode;
the inner protective sleeve 2-1 is connected with the ceramic insulating cap 2-2-1 in a fusion sealing welding mode; the inner protective sleeve 2-1 and the outer protective sleeve 2-3 are in open circuit, and the insulation resistance between the inner protective sleeve 2-1 and the outer protective sleeve 2-3 is not less than 1015Ω；
The length of the ceramic insulating cap 2-2-1 is L, and the value range of L is 0.5 cm-1.5 cm;
the inner protective sleeve 2-1 is a stainless steel inner protective sleeve, and the outer protective sleeve 2-3 is a stainless steel outer protective sleeve.
The outer diameter of the outer protective sleeve 2-3 is equal to the outer diameter of the ceramic insulating cap 2-2-1, so that the ceramic insulating sleeve 2-2 and the outer protective sleeve 2-3 can be assembled into a whole, and the surface roughness of the cable is reduced; the length of the outer protective sleeve 2-3 is greater than that of the ceramic insulating pipe 2-2-2, so that the outer protective sleeve is connected with the ceramic insulating pipe 2-2-2, and the length of the seal head is prolonged, and the strength of the end head of the seal head is improved; the inner protective sleeve 2-1 and the outer protective sleeve 2-3 are isolated by the ceramic insulating sleeve 2-2, so that the open circuit between the inner protective sleeve 2-1 and the outer protective sleeve 2-3 is ensured; the length of the ceramic insulating cap 2-2-1 is L, so that the extension length of the end of the armored cable 1 is determined, the value range of L is 0.5 cm-1.5 cm, the investment cost is low, the rapid heat dissipation of the high-temperature welding temperature can be guaranteed, and the welding safety of the armored cable 1 is protected.
In this embodiment, a sliding sleeve 3 matched with the female connector 26 of the cable socket is arranged on a cable section between two armored cable heads 2 on the armored cable 1.
It should be noted that the purpose of providing the sliding sleeve 3 matched with the female head 26 of the cable socket on the cable section between the two armored cable heads 2 on the armored cable 1 is to fix the end of the armored cable 1, ensure the strength of the end of the armored cable 1, avoid the overlong length of the outer protective sleeve 2-3, save raw materials and reduce cost.
In this embodiment, an annular support plate 8 matched with the inner wall of the outer cylinder 21 is arranged on the outer edge of the baffle plate 7.
In this embodiment, the active holder 12 is disposed on the high voltage electrode 14 for self-checking of the detector.
In this embodiment, the front end of the baffle 7 is provided with a front press ring 4 with a hollow structure, an external thread is arranged outside the front press ring 4, an internal thread matched with the external thread is arranged at the front end of the outer cylinder 21, the front press ring 4 and the baffle 7 are coaxially arranged, the inner ionization chamber is pressed into the outer protection cylinder by the front press ring 4, and the inner ionization chamber is prevented from oscillating in the outer protection cylinder.
In this embodiment, high pressure pole 14 is the pipe formula high pressure pole, and collector 13 is the pipe formula collector, interior clamping ring 10 is ring formula interior clamping ring, protection ring 9 is ring formula protection ring, and backup pad 8 is the ring formula backup pad, and the external diameter of backup pad 8, protection ring 9 and interior clamping ring 10 equals, and the external diameter of interior clamping ring 10 is greater than the external diameter of high pressure pole 14.
In this embodiment, the baffle 7, the support plate 8, the protection ring 9, the inner compression ring 10, the high voltage electrode 14, the collector 13 and the rear compression ring 15 are all made of aluminum; the front gland 18, the protective sleeve 19, the outer cylinder front cover 20, the outer cylinder 21, the outer cylinder rear cover 22, the inflation tube 23 and the rear cover 24 are all made of stainless steel, the outer protective cylinder is made of stainless steel, the inner ionization chamber is made of aluminum, and the gamma radiation detector has good measurement linearity and energy response when detecting gamma radiation.
In this embodiment, the working gas is argon or nitrogen.
When the utility model is used, the assembled inner ionization chamber is arranged on the baffle 7, the supporting plate 8 is arranged outside the baffle 7, the rear pressing ring 15 at the rear end is connected with the damping spring 16, the outer cylinder 21 is welded with the outer cylinder rear cover 22 of the welded inflation tube 23, and then the inner ionization chamber with the damping spring 16 is pressed into the outer cylinder 21 by the front pressing ring 4; the outer protective sleeve 2-3 is connected with the shell of the ceramic insulating pipe 2-2-2 in a sealing welding mode, the inner protective sleeve 2-1 is connected with one end of the ceramic insulating cap 2-2-1 far away from the ceramic insulating pipe 2-2-2 in a sealing welding mode, the armored cable 1 passes through the outer protective sleeve 2-3, the ceramic insulating cap 2-2-1 and the inner protective sleeve 2-1, the shell of the armored cable 1 is connected with the outer protective sleeve 2-3 in a brazing mode, secondary processing of the armored cable is easy, the strength of the core wire of the armored cable is further improved, the end insulation extension of the armored cable 1 is realized, high-temperature welding between the armored cable 1 and a cable socket is realized, the damage of the end of the armored cable by high-temperature welding is avoided, and the end insulation of the armored cable is well protected, then sheathing one end of the armored cable 1 with the armored cable head 2 on a front gland 18, a protective sleeve 19 and an outer cylinder front cover 20 in sequence, inserting a core wire of the armored cable 1 into a cable socket, clamping the whole detector, respectively welding the outer cylinder front cover 20 with an outer cylinder 21 in a welding mode, welding the outer cylinder front cover 20 with the armored cable 1, detecting leakage and inflating the detector through an inflation tube 23 after welding, finally sealing the inflation tube 23, leading the other end of the armored cable 1 with the armored cable head 2 to be a data processing end, installing a cable socket female head 26 outside the other end of the armored cable 1 with the armored cable head 2, adjusting the position of a sliding sleeve 3, welding the cable socket female head 26 with the cable socket female head 26 to ensure the strength of the other end of the armored cable 1 with the armored cable head 2, inserting and matching the other end of the armored cable 1 with the cable socket female head 26 with a second cable socket 27 with a cable socket male head 25, one of the two armored cables 1 is a high-voltage cable, the other is a signal cable, an electric field is applied to the high-voltage electrode 14 through a high-voltage wire, the inflating medium is argon and nitrogen, and the gamma rays generate ionization current when passing through the electric field, are absorbed by the collecting electrode 13 and are transmitted out through the signal cable, so that the using effect is good.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (10)
1. The ionization chamber radiation detector is used after the accident and the accident, which is characterized in that: the cable protection device comprises an outer protection barrel, an inner ionization chamber arranged in the outer protection barrel and an inorganic armored cable which is arranged outside the outer protection barrel and connected with the inner ionization chamber, wherein the outer protection barrel comprises an outer barrel (21), an outer barrel front cover (20) and an outer barrel rear cover (22) which are hermetically matched with the outer barrel (21), two wire outlet pipes are arranged at the front end of the outer barrel front cover (20), a protective sleeve (19) is arranged on the front side of the outer barrel front cover (20), two through holes which are respectively matched with the two wire outlet pipes are formed in the protective sleeve (19), a front gland (18) with a hollow structure is sleeved outside the protective sleeve (19), an inflation pipe (23) is arranged at the rear end of the outer barrel rear cover (22), and a rear cover (24) used for sealing the inflation pipe (23) is arranged outside the outer barrel rear cover (22);
the inner ionization chamber comprises a high-voltage electrode (14) and a collector (13) which are both tubular structures, the collector (13) is arranged in the high-voltage electrode (14) and is coaxially arranged with the high-voltage electrode (14), an inflation tube (23) is communicated with the inner ionization chamber, working gas enters the inner ionization chamber through the inflation tube (23), the front ends of the collector (13) and the high-voltage electrode (14) are connected through an inner pressure ring (10), cable joints of the high-voltage electrode (14) and cable joints of the collector (13) are both arranged in the inner pressure ring (10), the cable joints of the high-voltage electrode (14) and the cable joints of the collector (13) are both provided with first ceramic insulators (11) at contact positions with the inner pressure ring (10), the rear ends of the collector (13) and the high-voltage electrode (14) are connected through a rear pressure ring (15), and second ceramic insulators (17) are arranged at connection positions of the collector (13) and the high-voltage electrode (14) and the rear pressure ring (15), the rear end of the rear pressing ring (15) is connected with the outer cylinder (21) through a damping spring (16), the inner pressing ring (10) is connected with a baffle (7) of a hollow structure through a protection ring (9), two first cable sockets (5) penetrate through a hollow area of the baffle (7), a cable joint of a high-voltage pole (14) is connected with the bottom end of one first cable socket (5), a cable joint of a collector (13) is connected with the bottom end of the other first cable socket (5), and the two first cable sockets (5) are fixedly connected with the baffle (7) through a third ceramic insulator (6);
inorganic armoured cable includes that two pass preceding gland (18) in proper order, protective sheath (19) and urceolus protecgulum (20) are connected with two first cable socket (5) complex armoured cable (1) respectively, the one end that first cable socket (5) were kept away from in armoured cable (1) is connected with second cable socket (27), the both ends of armoured cable (1) all are provided with armoured cable head (2), armoured cable (1) are close to the one end of first cable socket (5) and pass through armoured cable head (2) and first cable socket (5) cooperation, armoured cable (1) are kept away from one of first cable socket (5) and are served outward and be provided with female head of cable socket (26) of armoring cable (2), second cable socket (27) are outward provided with female head of cable socket (26) complex male head of cable socket (25).
2. An incident and post-incident ionization chamber radiation detector according to claim 1, wherein: the armored cable seal head (2) comprises a ceramic insulating sleeve (2-2) sleeved at the end of the armored cable (1), the ceramic insulating sleeve (2-2) comprises a ceramic insulating cap (2-2-1) with a hollow structure and a ceramic insulating tube (2-2-2) integrally communicated with the ceramic insulating cap (2-2-1), the inner diameter of the ceramic insulating tube (2-2-2) is equal to the outer diameter of a core wire of the armored cable (1), the outer diameter of the ceramic insulating tube (2-2-2) is equal to the outer diameter of the armored cable (1), the outer diameter of the ceramic insulating tube (2-2-2) is smaller than the outer diameter of the ceramic insulating cap (2-2-1), the core wire of the armored cable (1) extends into the ceramic insulating tube (2-2-2), an outer protective sleeve (2-3) is sleeved on the armored cable (1), one end of the outer protective sleeve (2-3) is sleeved on the ceramic insulating tube (2-2-2) and is abutted against the ceramic insulating cap (2-2-1), one end, far away from the ceramic insulating tube (2-2-2), of the ceramic insulating cap (2-2-1) is provided with the inner protective sleeve (2-1), the inner diameter of the ceramic insulating cap (2-2-1) is equal to that of the inner protective sleeve (2-1), and a core wire of the armored cable (1) penetrates through the ceramic insulating cap (2-2-1) and is connected with the inner protective sleeve (2-1) in a compression joint mode.
3. An incident and post-incident ionization chamber radiation detector according to claim 2, wherein: the outer diameter of the outer protective sleeve (2-3) is equal to that of the ceramic insulating cap (2-2-1); the length of the outer protective sleeve (2-3) is greater than that of the ceramic insulating tube (2-2-2);
the shell of the armored cable (1) is connected with the outer protective sleeve (2-3) in a brazing mode, and the outer protective sleeve (2-3) is connected with the shell of the ceramic insulating tube (2-2-2) in a sealing welding mode;
the inner protective sleeve (2-1) is connected with the ceramic insulating cap (2-2-1) in a fusion sealing welding mode; the inner protective sleeve (2-1) and the outer protective sleeve (2-3) are in open circuit, and the insulation resistance between the inner protective sleeve (2-1) and the outer protective sleeve (2-3) is not less than 1015Ω；
The length of the ceramic insulating cap (2-2-1) is L, and the value range of L is 0.5 cm-1.5 cm;
the inner protective sleeve (2-1) is a stainless steel inner protective sleeve, and the outer protective sleeve (2-3) is a stainless steel outer protective sleeve.
4. An incident and post-incident ionization chamber radiation detector according to claim 1, wherein: and a sliding sleeve (3) matched with the female head (26) of the cable socket is arranged on a cable section between the two armored cable seal heads (2) on the armored cable (1).
5. An incident and post-incident ionization chamber radiation detector according to claim 1, wherein: and an annular supporting plate (8) matched with the inner wall of the outer barrel (21) is arranged on the outer edge of the baffle (7).
6. An incident and post-incident ionization chamber radiation detector according to claim 1, wherein: an active support (12) is arranged on the high-voltage pole (14).
7. An incident and post-incident ionization chamber radiation detector according to claim 1, wherein: the front end of baffle (7) is provided with hollow structure's preceding clamping ring (4), is provided with the external screw thread outside preceding clamping ring (4), the front end of urceolus (21) be provided with external screw thread complex internal thread, preceding clamping ring (4) and baffle (7) are coaxial to be laid.
8. An incident and post-incident ionization chamber radiation detector according to claim 5, wherein: the high-voltage pole (14) is a circular tube type high-voltage pole, the collector (13) is a circular tube type collector, the inner compression ring (10) is a circular ring type inner compression ring, the protection ring (9) is a circular ring type protection ring, the supporting plate (8) is a circular ring type supporting plate, the outer diameters of the supporting plate (8), the protection ring (9) and the inner compression ring (10) are equal, and the outer diameter of the inner compression ring (10) is larger than that of the high-voltage pole (14).
9. An incident and post-incident ionization chamber radiation detector according to claim 5, wherein: the baffle (7), the support plate (8), the protection ring (9), the inner compression ring (10), the high-voltage electrode (14), the collector (13) and the rear compression ring (15) are all made of aluminum products; the front gland (18), the protective sleeve (19), the outer cylinder front cover (20), the outer cylinder (21), the outer cylinder rear cover (22), the inflation tube (23) and the rear cover (24) are all made of stainless steel.
10. An incident and post-incident ionization chamber radiation detector according to claim 1, wherein: the working gas is argon and nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921402250.2U CN210572771U (en) | 2019-08-27 | 2019-08-27 | Ionization chamber radiation detector for accident and after accident |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921402250.2U CN210572771U (en) | 2019-08-27 | 2019-08-27 | Ionization chamber radiation detector for accident and after accident |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441809A (en) * | 2019-08-27 | 2019-11-12 | 西安中核核仪器有限公司 | Ionisation chamber radiation detector is used after nuclear reactor accident and accident |
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2019
- 2019-08-27 CN CN201921402250.2U patent/CN210572771U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441809A (en) * | 2019-08-27 | 2019-11-12 | 西安中核核仪器有限公司 | Ionisation chamber radiation detector is used after nuclear reactor accident and accident |
| CN110441809B (en) * | 2019-08-27 | 2024-06-11 | 西安中核核仪器股份有限公司 | Nuclear reactor accident and ionization chamber radiation detector for accident |
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Address after: Yanta District in Shaanxi province Xi'an City Road 710061, No. 108 Patentee after: Xi'an Zhonghe Nuclear Instrument Co.,Ltd. Address before: Yanta District in Shaanxi province Xi'an City Road 710061, No. 108 Patentee before: XI'AN ZHONGHE NUCLEAR APPARATUS CO.,LTD. |