Inert gas charging device for neutron generator

Abstract

The utility model discloses an inert gas charging device for a neutron generator, which belongs to the field of neutron generators and comprises a gas cylinder, a gas pipe and a gas nozzle, inert gas is filled in the gas cylinder, one end of the gas pipe is connected with the gas cylinder, and the other end of the gas pipe is connected with the gas nozzle; the air tap comprises a plug, a pin, an outer cylinder, a sliding sleeve, a spring and a limiting steel ball, one end of the plug is used for being in threaded connection with an inflation pipe opening of the neutron generator, and the other end is used for being inserted into the pin; the contact pin comprises a main pipe body, a partition plate and a pin head, the partition plate is arranged on the inner wall of the main pipe body, the front surface of the partition plate and the inner wall of the main pipe body define a front pipe part, the rear surface of the partition plate and the inner wall of the main pipe body define a rear pipe part, the plug is inserted into the front pipe part, and one end of the pin head is connected to the front surface of the partition plate and communicated with the rear pipe part. And the other end of the needle head is inserted into the plug, so that the convenience for a worker to inflate by using the inert gas inflating device can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to neutron generator technical field, concretely relates to a kind of inert gas inflation device for neutron generator. BACKGROUND

[0002] Neutron generator is a kind of device that can efficiently and controllably produce neutrons. Its working principle mainly utilizes high-energy particles to hit target atomic nuclei, or causes isotope deuterium and tritium of hydrogen in vacuum tube to occur fusion reaction by laser-generated instantaneous high temperature, thereby generating instantaneous neutron flow pulse. Generally, inert gas needs to be filled into neutron generator, and inert gas can protect the circuit elements inside neutron generator, improve the stability of neutron generator, so it is necessary to use inflation equipment to fill inert gas into neutron generator.

[0003] The common inflation equipment currently includes gas cylinder, gas pipe and gas nozzle, one end of the gas pipe is connected with the gas cylinder, and the other end is connected with the gas nozzle. When inflating, the worker first holds the gas nozzle and inserts it into the inflation pipe opening of the neutron generator, then opens the gas cylinder to inflate the neutron generator. After inflation is completed, the worker pulls out the gas nozzle from the inflation pipe opening of the neutron generator. With this structure, the gas cylinder, gas pipe and gas nozzle can be used to fill inert gas into the neutron generator. However, the worker needs to hold the gas nozzle and gas pipe for a long time during the inflation process, which makes it inconvenient for the worker to use the inflation equipment to inflate. UTILITY MODEL CONTENTS

[0004] In order to solve the above problems existing in the prior art, the utility model provides an inert gas inflation device for neutron generator. The technical problem to be solved by the utility model is solved by the following technical scheme:

[0005] In the first aspect, the utility model provides an inert gas inflation device for neutron generator, which includes a gas cylinder, a gas pipe and a gas nozzle. The gas cylinder contains inert gas. One end of the gas pipe is connected with the gas cylinder, and the other end is connected with the gas nozzle.

[0006] The gas nozzle includes a plug, a pin, an outer cylinder, a sliding sleeve, a spring and a limiting steel ball. One end of the plug is used for threaded connection with the inflation pipe opening of the neutron generator, and the other end is used for plug-in connection with the pin.

[0007] The pin includes a main pipe body, a partition and a needle head. The partition is arranged on the inner wall of the main pipe body and perpendicular to the axis of the main pipe body. The front surface of the partition and the inner wall of the main pipe body form a front pipe part, and the rear surface of the partition and the inner wall of the main pipe body form a rear pipe part. The plug is inserted into the front pipe part. One end of the needle head is connected to the front surface of the partition and communicates with the rear pipe part. The other end of the needle head is inserted into the plug.

[0008] The outer cylinder, the sliding sleeve and the main pipe body are sequentially sleeved, the outer cylinder and the sliding sleeve are threadedly connected, the inner surface of the sliding sleeve is provided with a first protrusion, the outer surface of the main pipe body is provided with a second protrusion, the spring is sleeved on the outer surface of the main pipe body and located between the first protrusion and the second protrusion, the front pipe part is provided with a through hole, the plug is provided with a limiting groove, the limiting steel ball is located in the through hole, and the diameter of the limiting steel ball is greater than the depth of the through hole.

[0009] In the case that the spring is in a free state, the first protrusion corresponds to the through hole, the limiting steel ball is located in the limiting groove and is in limiting cooperation with the first protrusion, and in the case that the spring is in a compressed state, the first protrusion is staggered with the through hole.

[0010] In an embodiment of the utility model, still include frame, gas cylinder is installed on the frame, the bottom of frame is equipped with walking wheel, walking wheel and frame rotation connection.

[0011] In an embodiment of the utility model, still include air pressure gauge assembly, inflation pipe and output pipe, air pressure gauge assembly is installed on the frame, air pressure gauge assembly includes first air pressure gauge, inflation passage and output passage, one end of inflation pipe and gas cylinder intercommunication, the other end of inflation pipe and inflation passage intercommunication, one end of output pipe and output passage intercommunication, the other end of output pipe and the back pipe part of plug intercommunication, inflation passage and output passage intercommunication, first air pressure gauge and inflation passage intercommunication.

[0012] In an embodiment of the utility model, still include air pump and air suction pipe, air pressure gauge assembly still includes air suction passage and second air pressure gauge, one end of air suction pipe and air pump intercommunication, the other end and air suction passage intercommunication, air suction passage and output passage intercommunication, second air pressure gauge and air suction passage intercommunication.

[0013] In an embodiment of the utility model, still be equipped with first switch and second switch on air pressure gauge assembly, first switch is used for the control inflation passage and output passage between the on-off, second switch is used for the control air suction passage and output passage between the on-off.

[0014] In an embodiment of the utility model, still include elastic snap ring, the outer surface of front pipe part is equipped with annular clamping groove, and the elastic snap ring is located in the annular clamping groove, and the first protrusion is located between the annular clamping groove and the spring.

[0015] In an embodiment of the utility model, the filter piece is further arranged in the rear pipe part, and the filter piece is perpendicular to the axis of the rear pipe part.

[0016] In an embodiment of the utility model, in the case that the spring is in a free state, a gap exists between the end face of the plug and the front surface of the partition plate.

[0017] In an embodiment of the utility model, the first protrusion is an annular protrusion arranged along the circumference of the sliding sleeve.

[0018] In one embodiment of the utility model, four perforations are arranged, and the four perforations are sequentially distributed along the circumference of the front pipe part, and one limiting steel ball is arranged in each perforation.

[0019] Compared with the prior art, the utility model has the beneficial effects of:

[0020] In the above scheme of the application, the inert gas charging device comprises a gas cylinder, a gas pipe and a gas nozzle, the gas cylinder is filled with inert gas, one end of the gas pipe is connected with the gas cylinder, and the other end is connected with the gas nozzle; the gas nozzle comprises a plug, a needle, an outer cylinder, a sliding sleeve, a spring and a limiting steel ball, one end of the plug is used for being screwed with the charging pipe opening of the neutron generator, and the other end is used for being inserted with the needle; the needle comprises a main pipe body, a partition plate and a needle head, the partition plate is arranged on the inner wall of the main pipe body and is perpendicular to the axis of the main pipe body, the front surface of the partition plate and the inner wall of the main pipe body form a front pipe part, the rear surface of the partition plate and the inner wall of the main pipe body form a rear pipe part, the plug is inserted in the front pipe part, one end of the needle head is connected with the front surface of the partition plate and communicates with the rear pipe part, and the other end of the needle head is inserted in the plug; the outer cylinder, the sliding sleeve and the main pipe body are sequentially sleeved, the outer cylinder and the sliding sleeve are screwed, the first protrusion is arranged on the inner surface of the sliding sleeve, the second protrusion is arranged on the outer surface of the main pipe body, the spring is sleeved on the outer surface of the main pipe body and located between the first protrusion and the second protrusion, the perforation is arranged on the front pipe part, the limiting groove is arranged on the plug, the limiting steel ball is located in the perforation, and the diameter of the limiting steel ball is greater than the depth of the perforation; in the case that the spring is in a free state, the first protrusion corresponds to the perforation, the limiting steel ball is located in the limiting groove and is limited with the first protrusion, and in the case that the spring is in a compressed state, the first protrusion is staggered with the perforation. By adopting the structure, when charging, the staff can first screw the plug to the charging pipe opening of the neutron generator, and then control the outer cylinder to move away from the plug, when the outer cylinder moves, the sliding sleeve is driven to move away from the plug, and then the first protrusion exerts pressure on the spring, so that the spring is compressed between the first protrusion and the second protrusion, at this time, the spring is in a compressed state; then the front pipe part is inserted into the plug, because the spring is in a compressed state, the first protrusion is staggered with the perforation, so the limiting steel ball in the perforation can protrude to one side of the sliding sleeve, thereby ensuring that the front pipe part can be inserted into the plug; after the front pipe part is inserted into the plug, the staff can loosen the outer cylinder, under the elastic action of the spring, the outer cylinder and the sliding sleeve are reset, at this time, the spring is in a free state, the first protrusion corresponds to the perforation, so the first protrusion limits the limiting steel ball, so that the limiting steel ball is limited in the limiting groove, thereby the plug and the front pipe part can be clamped by the limiting steel ball and the limiting groove, avoiding the needle from being separated from the plug. In this way, when the staff uses the above inert gas charging device to charge, the staff inserts the needle into the plug, and then loosens the gas nozzle by clamping the limiting steel ball and the limiting groove, so it is not necessary to hold the gas nozzle and the gas pipe for a long time during the charging process, thereby improving the convenience of the staff using the inert gas charging device to charge.

[0021] The utility model will be further explained in detail in combination with the drawings and examples. DRAWINGS

[0022] Figure 1 is a schematic diagram of the inert gas inflator device provided by the embodiment of the utility model Figure 1 ;

[0023] Figure 2 is a schematic diagram of the inert gas inflator device provided by the embodiment of the utility model Figure 2 ;

[0024] Figure 3 is a schematic diagram of the gas nozzle in the embodiment of the utility model

[0025] Figure 4 is a schematic diagram of the air pressure gauge assembly in the embodiment of the utility model

[0026] Figure 5 is a schematic diagram of the main pipe body and the limiting steel ball in the embodiment of the utility model

[0027] Reference signs: 1-gas cylinder, 2-carriage, 3-traveling wheel, 4-gas nozzle, 41-plug, 42-plug pin, 421-main pipe body, 422-baffle, 423-needle, 43-outer cylinder body, 44-sliding sleeve, 45-spring, 46-limiting steel ball, 47-elastic snap ring, 5-air pressure gauge assembly, 51-inflation channel, 52-output channel, 53-pumping channel, 54-first air pressure gauge, 55-second air pressure gauge, 6-inflation pipe, 7-output pipe, 8-pumping pump, 9-pumping pipe, 10-first switch, 11-second switch, 12-pressure reducing valve, 13-filter sheet DETAILED DESCRIPTION

[0028] The utility model will be described further in detail in combination with specific embodiments, but the implementation mode of the utility model is not limited to this.

[0029] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The utility model embodiment provides a kind of inert gas inflation device for neutron generator, including gas cylinder 1, gas pipe and gas nozzle 4, inert gas is contained in gas cylinder 1, one end of gas pipe is connected with gas cylinder 1, other end is connected with gas nozzle 4;Gas nozzle 4 includes plug 41, insertion pin 42, outer cylinder 43, sliding sleeve 44, spring 45 and limit steel ball 46, one end of plug 41 is used to be connected with the inflation pipe 6 mouth of neutron generator with thread, other end is used to be inserted with insertion pin 42;Insertion pin 42 includes main pipe body 421, baffle 422 and needle 423, baffle 422 is along the inner wall of main pipe body 421 and with the axis of main pipe body 421 vertical, the front surface of baffle 422 and the inner wall of main pipe body 421 enclose front pipe part, the rear surface of baffle 422 and the inner wall of main pipe body 421 enclose rear pipe part, plug 41 is inserted in front pipe part, one end of needle 423 is connected on the front surface of baffle 422 and communicates with rear pipe part, other end of needle 423 is inserted in plug 41;Outer cylinder 43, sliding sleeve 44 and main pipe body 421 are sequentially sleeved, outer cylinder 43 and sliding sleeve 44 are threadedly connected, first protrusion is equipped on the inner surface of sliding sleeve 44, second protrusion is equipped on the outer surface of main pipe body 421, spring 45 is sleeved on the outer surface of main pipe body 421 and is located between first protrusion and second protrusion, perforation is equipped on front pipe part, limit slot is equipped on plug 41, limit steel ball 46 is located in perforation, the diameter of limit steel ball 46 is greater than the depth of perforation;In the case that spring 45 is in free state, first protrusion and perforation correspond, limit steel ball 46 is located in limit slot and is limitedly matched with first protrusion, in the case that spring 45 is in compressed state, first protrusion and perforation are staggered.

[0030] In some embodiments of the application, the inert gas contained in the gas cylinder 1 can be sulfur hexafluoride gas. Sulfur hexafluoride gas has excellent arc extinguishing and insulating properties, and is colorless, odorless, non-toxic and non-combustible in pure gas state, and has relatively stable performance in normal temperature environment. Compared with traditional insulating oil, sulfur hexafluoride gas has better insulating properties and arc extinguishing ability.

[0031] In some embodiments of the application, the plug 41 is a cylindrical structure, the plug 41 includes a front cylinder part and a rear cylinder part, the inner wall of the front cylinder part is provided with internal threads, the inflation pipe 6 mouth of the neutron generator is a pipe mouth provided with external threads, the internal threads of the front cylinder part and the external threads of the inflation pipe 6 mouth are threadedly engaged, so that the plug 41 can be installed on the inflation pipe 6 mouth of the neutron generator, the rear cylinder part is inserted into the front pipe part of the main pipe body 421 of the plug 41, the limit slot is provided on the outer surface of the rear cylinder part, the diameter of the front cylinder part is greater than the diameter of the rear cylinder part, and a tapered transition section is provided between the front cylinder part and the rear cylinder part.

[0032] In some embodiments of this application, the partition 422 and the main body 421 are integrally formed, the needle 423 and the partition 422 are integrally formed, the needle 423 is provided with an inflation hole, and the inflation hole is provided through the partition 422.

[0033] In some embodiments of this application, the outer surface of the sliding sleeve 44 is provided with an external thread, and the inner wall of the outer cylinder 43 is provided with an internal thread, and the external thread on the outer surface of the sliding sleeve 44 and the internal thread on the inner wall of the outer cylinder 43 are threadedly engaged.

[0034] In some embodiments of this application, such as Figure 5 As shown, the upper part of the perforation can be a cylindrical hole with a diameter greater than or equal to the diameter of the limiting steel ball 46. The lower part of the perforation can be a hemispherical hole with the upper diameter being the same as the diameter of the cylindrical hole, the lower diameter being smaller than the diameter of the limiting steel ball 46, the depth being less than the radius of the limiting steel ball 46, and the radius of the hemispherical hole being equal to the radius of the limiting steel ball 46. Thus, the bottom of the limiting steel ball 46 can protrude from the hemispherical hole, and the protruding part can engage with the limiting groove. Furthermore, the hemispherical hole can support and limit the limiting steel ball 46, improving its stability and preventing it from slipping out from below the perforation. Additionally, the limiting steel ball 46 can move towards the cylindrical hole to facilitate the insertion and engagement of the plug 41 and the pin 42.

[0035] In the above scheme, the inert gas charging device comprises a gas cylinder 1, a gas pipe and a gas nozzle 4, the gas cylinder 1 is filled with inert gas, one end of the gas pipe is connected with the gas cylinder 1, and the other end is connected with the gas nozzle 4; the gas nozzle 4 comprises a plug 41, a needle 42, an outer cylinder 43, a sliding sleeve 44, a spring 45 and a limiting steel ball 46, one end of the plug 41 is used for threaded connection with the charging pipe 6 of the neutron generator, and the other end is used for plug connection with the needle 42; the needle 42 comprises a main pipe body 421, a partition plate 422 and a needle head 423, the partition plate 422 is arranged on the inner wall of the main pipe body 421 and is perpendicular to the axis of the main pipe body 421, the front surface of the partition plate 422 and the inner wall of the main pipe body 421 form a front pipe part, the rear surface of the partition plate 422 and the inner wall of the main pipe body 421 form a rear pipe part, the plug 41 is inserted into the front pipe part, one end of the needle head 423 is connected to the front surface of the partition plate 422 and communicates with the rear pipe part, and the other end of the needle head 423 penetrates into the plug 41; the outer cylinder 43, the sliding sleeve 44 and the main pipe body 421 are sequentially sleeved, the outer cylinder 43 and the sliding sleeve 44 are threadedly connected, the inner surface of the sliding sleeve 44 is provided with a first protrusion, the outer surface of the main pipe body 421 is provided with a second protrusion, the spring 45 is sleeved on the outer surface of the main pipe body 421 and located between the first protrusion and the second protrusion, the front pipe part is provided with a through hole, the plug 41 is provided with a limiting groove, the limiting steel ball 46 is located in the through hole, and the diameter of the limiting steel ball 46 is greater than the depth of the through hole; in the case that the spring 45 is in a free state, the first protrusion corresponds to the through hole, the limiting steel ball 46 is located in the limiting groove and limitedly matched with the first protrusion, and in the case that the spring 45 is in a compressed state, the first protrusion is staggered with the through hole. By adopting the structure, when charging, the staff can first screw the plug 41 to the charging pipe 6 of the neutron generator, and then control the outer cylinder 43 to move away from the plug 41, when the outer cylinder 43 moves, the sliding sleeve 44 is driven to move away from the plug 41, and then the first protrusion exerts pressure on the spring 45, so that the spring 45 is compressed between the first protrusion and the second protrusion, at this time, the spring 45 is in a compressed state; then the front pipe part is inserted into the plug 41, because the spring 45 is in a compressed state, the first protrusion is staggered with the through hole, so the limiting steel ball 46 in the through hole can protrude to one side of the sliding sleeve 44, thereby ensuring that the front pipe part can be inserted into the plug 41; after the front pipe part is inserted into the plug 41, the staff can loosen the outer cylinder 43, under the elastic action of the spring 45, the outer cylinder 43 and the sliding sleeve 44 are reset, at this time, the spring 45 is in a free state, the first protrusion corresponds to the through hole, so the first protrusion limits the limiting steel ball 46, so that the limiting steel ball 46 is limited in the limiting groove, thereby the plug 41 and the front pipe part can be clamped by the limiting steel ball 46 and the limiting groove, so as to avoid the needle 42 from being separated from the plug 41.Therefore, when the staff inflates the inert gas inflation device, the staff can loosen the gas nozzle 4 by the clamping cooperation between the limiting bead and the limiting groove after inserting the pin 42 into the plug 41, so that the staff does not need to hold the gas nozzle 4 and the gas pipe for a long time during the inflation process, thereby improving the convenience of the staff using the inert gas inflation device to inflate.

[0036] In some embodiments of the present application, as shown in Figure 1 and Figure 2 , the inert gas inflation device further comprises a frame 2, the gas cylinder 1 is installed on the frame 2, and the bottom of the frame 2 is provided with a walking wheel 3, and the walking wheel 3 is rotatably connected with the frame 2. By using this structure, the gas cylinder 1 can be carried more conveniently and quickly by the frame 2.

[0037] In some embodiments of the present application, the bottom of the frame 2 is provided with a plurality of walking wheels 3, and the stability of the frame 2 during transportation can be improved by providing a plurality of walking wheels 3.

[0038] In some embodiments of the present application, as shown in Figure 2 and Figure 4 , the inert gas inflation device further comprises a gas pressure gauge assembly 5, an inflation pipe 6 and an output pipe 7, the gas pressure gauge assembly 5 is installed on the frame 2, the gas pressure gauge assembly 5 comprises a first gas pressure gauge 54, an inflation passage 51 and an output passage 52, one end of the inflation pipe 6 is communicated with the gas cylinder 1, the other end of the inflation pipe 6 is communicated with the inflation passage 51, one end of the output pipe 7 is communicated with the output passage 52, the other end of the output pipe 7 is communicated with the rear pipe part of the pin 42, the inflation passage 51 and the output passage 52 are communicated, and the first gas pressure gauge 54 and the inflation passage 51 are communicated. By using this structure, the pressure in the inflation passage 51 can be detected by the first gas pressure gauge 54, so that the staff can observe the pressure of the gas filled into the neutron generator.

[0039] In some embodiments of the present application, as shown in Figure 2 and Figure 4 , the inert gas inflation device further comprises an air pump 8 and an air pipe 9, the gas pressure gauge assembly 5 further comprises an air exhaust passage 53 and a second gas pressure gauge 55, one end of the air pipe 9 is communicated with the air pump 8, the other end is communicated with the air exhaust passage 53, the air exhaust passage 53 and the output passage 52 are communicated, and the second gas pressure gauge 55 and the air exhaust passage 53 are communicated. By using this structure, the internal part of the neutron generator can be pumped by the air pump 8, so that the vacuum operation of the neutron generator can be realized. The pressure in the air exhaust passage 53 can be detected by the second gas pressure gauge 55, so that the staff can observe the gas pressure during the air exhaust.

[0040] In some embodiments of the present application, as shown inFigure 2 and Figure 4 As shown, the pressure gauge assembly 5 is also equipped with a first switch 10 and a second switch 11. The first switch 10 is used to control the on / off state between the inflation channel 51 and the output channel 52, and the second switch 11 is used to control the on / off state between the suction channel 53 and the output channel 52. With this structure, by controlling the on / off state between the inflation channel 51 and the output channel 52 through the first switch 10 and the suction channel 53 and the output channel 52 through the second switch 11, switching between inflation and suction operations can be achieved, improving the ease of use of the device.

[0041] In some embodiments of this application, such as Figure 4 As shown, inflation channel 51 and suction channel 53 are respectively located on both sides of output channel 52. Inflation channel 51 and output channel 52 are connected by a first connecting channel, and suction channel 53 and output channel 52 are connected by a second connecting channel. Inflation channel 51, output channel 52, and suction channel 53 are all arranged vertically, while the first and second connecting channels are both arranged horizontally. First switch 10 is located on the first connecting channel, and second switch 11 is located on the second connecting channel. First pressure gauge 54 is connected to the first connecting channel and is located on the same side of first switch 10 as inflation channel 51. Second pressure gauge 55 is connected to the second connecting channel and is located on the same side of second switch 11 as suction channel 53. Thus, when first switch 10 is open, first pressure gauge 54 can detect the air pressure in inflation channel 51, and when second switch 11 is open, second pressure gauge 55 can detect the air pressure in suction channel 53.

[0042] In some embodiments of this application, both the first switch 10 and the second switch 11 can be rotary switches. The rotary switch is a common type of rotary switch, for example, it may include a tubular housing, a rotating shaft, and a rotating plate. The tubular housing is disposed on the first or second connecting channel, and a circular groove is provided inside the tubular housing. The rotating shaft is fixed to the inner wall of the tubular housing, and the rotating plate and the rotating shaft are rotatably connected, with the rotating shaft located in the middle position of the rotating plate. Thus, when the rotating plate rotates relative to the rotating shaft to a vertical position, the rotary switch is in a closed state; when the rotating plate rotates relative to the rotating shaft to a horizontal position, the rotary switch is in an open state. By rotating the rotating plate, the connection between the inflation channel 51 and the output channel 52, or the connection between the suction channel 53 and the output channel 52, can be adjusted.

[0043] In some embodiments of this application, the first barometer 54 and the second barometer 55 are both commonly used barometers.

[0044] In some embodiments of this application, such as Figure 1As shown in the drawings, the gas filling pipe 6 is also provided with a pressure reducing valve 12. The pressure in the gas filling pipe 6 can be adjusted through the pressure reducing valve 12, so as to ensure that the pressure in the gas filling pipe 6 remains stable.

[0045] In some embodiments of the present application, the inert gas filling device further comprises an elastic snap ring 47. The outer surface of the front pipe part is provided with an annular clamping groove, and the elastic snap ring 47 is located in the annular clamping groove. The first protrusion is located between the annular clamping groove and the spring 45. With this structure, the sliding sleeve 44 can be limited by the elastic snap ring 47, so as to avoid the sliding sleeve 44 from slipping off the front pipe part, and improve the reliability of the movement of the sliding sleeve 44. Through the clamping cooperation of the elastic snap ring 47 and the annular clamping groove, the stability of the installation of the elastic snap ring 47 can be improved.

[0046] In some embodiments of the present application, as shown in the drawings, Figure 3 As shown in the drawings, the rear pipe part is also provided with a filter 13, and the filter 13 is perpendicular to the axis of the rear pipe part. With this structure, the gas can be filtered by the filter 13, which can reduce impurities in the gas and improve the reliability of the operation of the neutron generator.

[0047] In some embodiments of the present application, as shown in the drawings, Figure 3 As shown in the drawings, when the spring 45 is in a free state, there is a gap between the end surface of the plug 41 and the front surface of the partition plate 422. With this structure, the convenience of disassembly and assembly of the pin 42 can be improved.

[0048] In some embodiments of the present application, the first protrusion is an annular protrusion arranged along the circumference of the sliding sleeve 44. With this structure, the stability of the movement of the sliding sleeve 44 can be improved.

[0049] In some embodiments of the present application, the four through holes are sequentially distributed along the circumference of the front pipe part, and each through hole is provided with a limiting steel ball 46. With this structure, the connection reliability between the plug 41 and the pin 42 can be improved through the positioning of the four limiting steel balls 46.

[0050] In some embodiments of the present application, the distance between any two adjacent limiting steel balls 46 along the circumference of the front pipe part is equal.

[0051] In some embodiments of the present application, the limiting groove is provided with four limiting grooves, and the four limiting grooves are matched with the four limiting steel balls 46 respectively, so as to further improve the connection reliability between the plug 41 and the pin 42. Alternatively, the limiting groove is an annular groove, and the four limiting steel balls 46 are clamped in the annular groove.

[0052] In some embodiments of the present application, the use process of the inert gas filling device is as follows:

[0053] First, the plug 41 is screwed onto the gas filling pipe 6 of the neutron generator.

[0054] Secondly, the outer cylinder 43 is controlled to move away from the plug 41, and the outer cylinder 43 drives the sliding sleeve 44 to move away from the plug 41, and then the first protrusion exerts pressure on the spring 45, so that the spring 45 is compressed between the first protrusion and the second protrusion, and at this time, the spring 45 is in a compressed state.

[0055] After that, the front pipe part is inserted into the plug 41, and since the spring 45 is in a compressed state, the first protrusion and the perforation are staggered, so that the limiting steel ball 46 in the perforation can protrude to one side of the sliding sleeve 44, thereby ensuring that the front pipe part can be inserted into the plug 41; after the front pipe part is inserted into the plug 41, the operator can release the outer cylinder 43, and under the elastic action of the spring 45, the outer cylinder 43 and the sliding sleeve 44 are reset, at this time, the spring 45 is in a free state, the first protrusion corresponds to the perforation, so that the first protrusion limits the limiting steel ball 46, so that the limiting steel ball 46 is limited in the limiting groove, thereby enabling the plug 41 and the front pipe part to be clamped by the limiting steel ball 46 and the limiting groove.

[0056] After that, the first switch 10 is closed, the second switch 11 is opened, and the air pump 8 is used to pump the neutron generator to ensure that the inside of the neutron generator is in a vacuum state, and when pumping, the number in the second pressure gauge 55 is observed, and when the expected negative pressure value is reached, the air pump 8 is controlled to stop working.

[0057] After that, the second switch 11 is closed, the first switch 10 is opened, and the gas cylinder 1 is used to fill inert gas into the inside of the neutron generator, and when filling gas, the first pressure gauge 54 is observed and the pressure reducing valve 12 is adjusted to make the output gas pressure of the filling pipe 6 0.6MPa-0.8MPa, so as to ensure that the gas pressure in the inside of the neutron generator is at a preset value after stable filling, and the difference between the number of the first pressure gauge 54 and the number of the pressure reducing valve 12 is observed to ensure that there is no gas leakage during the filling process.

[0058] After that, the first switch 10 is closed, and the filling operation is completed.

[0059] After that, the outer cylinder 43 is controlled to move away from the plug 41, and the outer cylinder 43 drives the sliding sleeve 44 to move away from the plug 41, and then the first protrusion exerts pressure on the spring 45, so that the spring 45 is compressed between the first protrusion and the second protrusion, and at this time, the spring 45 is in a compressed state, and then the front pipe part is pulled out of the plug 41, and since the spring 45 is in a compressed state, the first protrusion and the perforation are staggered, so that the limiting steel ball 46 in the perforation can protrude to one side of the sliding sleeve 44, thereby ensuring that the front pipe part can be pulled out of the plug 41.

[0060] Finally, the plug 41 is screwed and detached from the inflation tube 6 of the neutron generator.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0062] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0063] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] The above is a further detailed description of the present application in combination with specific preferred embodiments, which cannot be considered as limiting the specific implementation of the present application to these descriptions. For ordinary skilled in the art, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the protection scope of the present application.

Claims

1. An inert gas charging device for a neutron generator, characterized by The gas cylinder, the gas pipe and the gas nozzle, the gas cylinder is filled with inert gas, one end of the gas pipe is connected with the gas cylinder, the other end is connected with the gas nozzle; The gas nozzle includes a plug, a pin, an outer cylinder, a sliding sleeve, a spring and a limiting steel ball, one end of the plug is used for being screwed with the inflation pipe of the neutron generator, the other end is used for being inserted with the pin; The pin includes a main pipe, a partition plate and a needle, the partition plate is arranged on the inner wall of the main pipe and is perpendicular to the axis of the main pipe, the front surface of the partition plate and the inner wall of the main pipe form a front pipe part, the rear surface of the partition plate and the inner wall of the main pipe form a rear pipe part, the plug is inserted into the front pipe part, one end of the needle is connected with the front surface of the partition plate and communicates with the rear pipe part, the other end of the needle is inserted into the plug; The outer cylinder, the sliding sleeve and the main pipe are sequentially sleeved, the outer cylinder and the sliding sleeve are screwed, the first protrusion is arranged on the inner surface of the sliding sleeve, the second protrusion is arranged on the outer surface of the main pipe, the spring is sleeved on the outer surface of the main pipe and located between the first protrusion and the second protrusion, the front pipe part is provided with a perforation, the plug is provided with a limiting groove, the limiting steel ball is located in the perforation, and the diameter of the limiting steel ball is greater than the depth of the perforation; When the spring is in a free state, the first protrusion corresponds to the perforation, the limiting steel ball is located in the limiting groove and is limitedly matched with the first protrusion, and when the spring is in a compressed state, the first protrusion is staggered with the perforation.

2. The inert gas inflation device for a neutron generator of claim 1, wherein, Further comprising a frame, the gas cylinder is installed on the frame, the bottom of the frame is provided with a walking wheel, and the walking wheel is rotationally connected with the frame.

3. The inert gas inflation device for a neutron generator of claim 2, wherein, Further comprising a gas pressure gauge assembly, an inflation pipe and an output pipe, the gas pressure gauge assembly is installed on the frame, the gas pressure gauge assembly includes a first gas pressure gauge, an inflation channel and an output channel, one end of the inflation pipe is communicated with the gas cylinder, the other end of the inflation pipe is communicated with the inflation channel, one end of the output pipe is communicated with the output channel, the other end of the output pipe is communicated with the rear pipe part of the pin, the inflation channel and the output channel are communicated, and the first gas pressure gauge and the inflation channel are communicated.

4. The inert gas inflation device for a neutron generator of claim 3, wherein, Further comprising a gas suction pump and a gas suction pipe, the gas pressure gauge assembly further comprises a gas suction channel and a second gas pressure gauge, one end of the gas suction pipe is communicated with the gas suction pump, the other end is communicated with the gas suction channel, the gas suction channel is communicated with the output channel, and the second gas pressure gauge is communicated with the gas suction channel.

5. The inert gas inflation device for a neutron generator of claim 4, wherein, The gas pressure gauge assembly is further provided with a first switch and a second switch, the first switch is used for controlling the on-off of the inflation channel and the output channel, and the second switch is used for controlling the on-off of the gas suction channel and the output channel.

6. The inert gas inflation device for a neutron generator of claim 1, wherein, Further comprising an elastic clamping ring, the outer surface of the front pipe part is provided with an annular clamping groove, the elastic clamping ring is located in the annular clamping groove, and the first protrusion is located between the annular clamping groove and the spring.

7. The inert gas inflation device for a neutron generator of claim 1, wherein, The rear pipe part is further provided with a filter sheet, and the filter sheet is perpendicular to the axis of the rear pipe part.

8. The inert gas inflation device for a neutron generator of claim 1, wherein, There is a gap between the end face of the plug and the front surface of the partition plate when the spring is in a free state.

9. The inert gas inflation device for a neutron generator of claim 1, wherein, The first protrusion is an annular protrusion arranged along the circumference of the sliding sleeve.

10. The inert gas inflation device for a neutron generator of claim 1, wherein, Four through holes are arranged along the circumference of the front pipe portion, and a limiting steel ball is arranged in each through hole.

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