A gas ionization chamber detector head and mounting tool

Abstract

The application discloses a gas ionization chamber detector head, which comprises an end cover, a sealing plug and a plurality of armored cables, the end cover is used for closing an ionization chamber of the gas ionization chamber detector, a bottom of the end cover is provided with an embedded part, the embedded part is used for embedding a gas port of the ionization chamber, a top of the end cover is concavely provided with an embedded groove, a plurality of sealing rings are protrusively arranged in the embedded groove, a vent hole is formed in a groove bottom of the embedded groove, and the vent hole penetrates through the end cover; the sealing plug is matched with the embedded groove, a plurality of sealing grooves are concavely arranged in the sealing plug, the sealing grooves are one-to-one corresponding to and matched with the sealing rings, when the sealing plug is embedded in the embedded groove and a bottom of the sealing plug abuts against the groove bottom of the embedded groove, the sealing rings are embedded in the corresponding sealing grooves; and the two ends of the armored cables respectively penetrate through the sealing plug and the end cover and are tightly welded with the sealing plug. The gas ionization chamber detector head can effectively solve the problem of poor sealing performance. A mounting tool can effectively solve the problems of inconvenient installation and poor sealing performance of the gas ionization chamber detector head.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reactor neutron fluence rate measurement, and particularly relates to a gas ionization chamber detector head and a mounting tool. BACKGROUND

[0002] The gas detector is used for measuring the neutron fluence rate of a nuclear reactor, and converts the neutron fluence rate of the reactor into a pulse signal input to a reactor power measurement system, a power protection system and a power regulation system, so as to realize the measurement of the reactor power by measuring the current signal or the pulse signal output by the detector.

[0003] For the gas ionization chamber detector, the internal working gas pressure, purity and the gas leakage rate after forming of the detector will directly affect the nuclear performance and the electrical performance of the ionization chamber, and the gas leakage rate is mainly attributed to the sealing performance of the ionization chamber head. However, the ionization chamber head not only needs to seal the internal gas of the ionization chamber to ensure a very low internal gas leakage rate, but also needs to undertake the task of leading out the signal line, so the sealing performance of the existing ionization chamber head is not ideal. SUMMARY

[0004] The first object of the present application is to provide a gas ionization chamber detector head, which solves the problem of the poor sealing performance of the gas ionization chamber detector head.

[0005] The second object of the present application is to provide a mounting tool, which solves the problems of the inconvenient installation of the gas ionization chamber detector head and the inability to ensure the sealing performance of the installed gas ionization chamber detector head.

[0006] The present application is achieved by the following technical solutions:

[0007] A gas ionization chamber detector head comprises: an end cover, which is used for closing an ionization chamber of a gas ionization chamber detector, and is provided with an embedded part at the bottom, which is used for embedding a gas port of the ionization chamber; a recessed groove is provided at the top of the end cover, a plurality of sealing rings are protruded in the groove, and a vent hole is opened at the groove bottom of the groove, which penetrates the end cover; a sealing plug, which is matched with the groove, is recessed with a plurality of sealing grooves, which are one-to-one corresponding and matched with the sealing rings, and when the sealing plug is embedded in the groove and the bottom of the sealing plug abuts against the groove bottom, the sealing ring is embedded in the corresponding sealing groove; a plurality of armored cables, which are respectively penetrated through the sealing plug and the end cover and are tightly welded with the sealing plug.

[0008] Optionally, the axial direction of the sealing ring is parallel to the depth direction of the embedding groove; the outer diameter of the sealing ring gradually increases along the axial direction, so that the outer wall of the sealing ring is provided in the form of a conical surface; the diameter of the conical surface gradually increases along the direction from the groove opening to the groove bottom of the embedding groove; the shape of the sealing groove matches the shape of the corresponding sealing ring.

[0009] Optionally, the radial thickness of the sealing ring is uniformly distributed.

[0010] Optionally, the embedding groove comprises a first embedding groove and a second embedding groove, both of which are cylindrical surface grooves, the first embedding groove and the second embedding groove are coaxially arranged, the diameter of the first embedding groove is greater than that of the second embedding groove; the end of the first embedding groove away from the second embedding groove is the groove opening of the embedding groove, and the end of the second embedding groove away from the first embedding groove is the groove bottom of the embedding groove; the sealing plug comprises a plug body and a plug disc arranged coaxially, the plug body matches the second embedding groove, and the plug disc matches the first embedding groove.

[0011] Optionally, the sealing ring comprises a first sealing ring and a second sealing ring; the first sealing ring is coaxially arranged at the groove bottom of the first embedding groove, and the second sealing ring is coaxially arranged at the groove bottom of the second embedding groove.

[0012] Optionally, the inner diameter of the bottom of the first sealing ring is the same as the diameter of the second embedding groove, and the outer diameter of the bottom of the first sealing ring is the same as the diameter of the first embedding groove; the outer diameter of the bottom of the second sealing ring is the same as the diameter of the second embedding groove.

[0013] Optionally, a plurality of insertion barrels are arranged on the side of the plug disc away from the plug body, the axial direction of the insertion barrel is parallel to the axial direction of the plug disc; the insertion barrel corresponds to the armored cable one by one, the inner diameter of the insertion barrel matches the diameter of the corresponding armored cable; the distance between the armored cable and the sealing plug axis is less than the distance between the inner wall of the sealing ring and the sealing plug axis.

[0014] A mounting tool for any of the above gas ionization chamber detector end caps, comprising: a positioning base, the top of the positioning base is used to carry the end cap; a collimating cylinder, the collimating cylinder is detachably arranged vertically on the top of the positioning base, the end cap is located at the lower part of the collimating cylinder, and the sealing plug can be vertically dropped above the embedding groove along the collimating cylinder; a pressure head, the pressure head is coaxially and detachably sleeved on the top of the collimating cylinder, and the pressure head is used to press down the sealing plug, so that the sealing plug is embedded in the embedding groove.

[0015] Optionally, a positioning groove is formed in the middle of the top of the positioning base, the shape of the positioning groove matches the shape of the bottom of the end cover; the shape of the inner wall of the collimating cylinder matches the shape of the periphery of the sealing plug; the inner wall of the lower part of the collimating cylinder is outwardly provided with a containing ring groove, the shape of the containing ring groove matches the shape of the periphery of the end cover, and the groove height of the containing groove is greater than the height of the end cover; a clearance hole is coaxially formed in the middle of the pressure head, the clearance hole penetrates the pressure head, and all the armored cables are located in the clearance hole.

[0016] Optionally, the top of the positioning base is provided with a positioning convex ring, the bottom of the collimating cylinder is provided with a positioning ring groove matching the positioning convex ring; the bottom of the positioning base is provided with an air groove penetrating the positioning base along the thickness direction, and the top end of the air groove is communicated with the air vent.

[0017] Compared with the prior art, the gas ionization chamber detector sealing head has the following advantages and beneficial effects:

[0018] The gas ionization chamber detector sealing head provided by the application improves the sealing area by setting the end cover, the embedded part at the bottom of the end cover and the embedding of the embedded part into the gas port of the ionization chamber, thereby improving the sealing performance between the end cover and the detector; on this basis, the embedding groove is formed in the top of the end cover, the sealing plug is embedded in the embedding groove, a plurality of armored cables are arranged, the armored cables penetrate the sealing plug, the sealing plug is embedded in the embedding groove, the sealing plug is extruded by the embedding groove, the armored cables are further indirectly extruded by the extruded sealing plug, the sealing performance between the sealing plug and the armored cables is improved, the gap between the armored cables and the sealing plug is further sealed by welding, and the sealing performance is further improved; on this basis, a plurality of sealing rings are arranged in the embedding groove, and a plurality of sealing grooves are formed in the sealing plug, the embedding between the two further improves the connection performance and the sealing performance between the sealing plug and the end cover; the mutual cooperation of the above-mentioned features enables the gas ionization chamber detector sealing head to effectively solve the problem of unsatisfactory sealing performance of the gas ionization chamber detector sealing head.

[0019] The specific shape of the sealing ring is set to be inclined to be inserted into the sealing groove, the downward pressure of the sealing plug is converted into the axial downward pressure and the radial inward force of the sealing ring, the sealing ring extrudes the inner wall of the sealing groove downward and inward, and the sealing performance between the two is further improved.

[0020] The embedding structure of the sealing plug and the embedding groove is in a stepped structure, the contact area of the embedding surfaces of the two is further increased, and the sealing performance between the two is further improved.

[0021] By setting the specific setting position of the sealing ring, further sealing rings are arranged at each step on the basis of the stepped structure to further improve the sealing performance of the stepped surface fitting part, the first sealing ring and the second sealing ring are arranged at the edges of the first embedding groove and the second embedding groove, on the one hand, the groove walls and corner structures of the first embedding groove and the second embedding groove respectively support the bottoms of the first sealing ring and the second sealing ring to prevent them from being extruded and deformed outwardly when bearing the downward pressure, so that the first sealing ring and the second sealing ring cannot be smoothly embedded in the corresponding sealing grooves; on the other hand, by limiting the positions of the bottoms of the first sealing ring and the second sealing ring, the groove walls of the first embedding groove and the second embedding groove respectively limit the tops of the first sealing ring and the second sealing ring, so that when the tops of the first sealing ring and the second sealing ring bear pressure, they will not be excessively deformed even if they are extruded and deformed outwardly, thereby further preventing the first sealing ring and the second sealing ring from being unable to be smoothly embedded in the corresponding sealing grooves;

[0022] By arranging the insertion cylinder on the top of the plug disc, the insertion cylinder is used to further increase the contact area between the sealing plug and the armored cable, thereby further improving the sealing performance between the two;

[0023] The mounting tool for the above-mentioned gas ionization chamber probe head is provided, which comprises a positioning base, a collimating cylinder and a pressing head, and the three are detachably connected, in use, the positioning base is placed on a workbench, then the end cover is placed on the top of the positioning base, the collimating cylinder is vertically placed on the top of the positioning base, the end cover is located in the lower part of the collimating cylinder, then the sealing plug is lowered along the collimating cylinder until the sealing plug falls above the embedding groove, finally the pressing head is vertically inserted into the collimating cylinder to press the sealing plug until the sealing plug is pressed into the embedding groove, then the pressing head and the collimating cylinder are detached, the pressed end cover and the sealing plug are taken out, the armored cable is connected and welded with the sealing plug, and the mounting of the above-mentioned gas ionization chamber probe head is completed, which can effectively solve the problem of inconvenient installation of the gas ionization chamber probe head and the problem of inability to guarantee the sealing performance of the installed gas ionization chamber probe head;

[0024] By arranging the positioning groove and the accommodating ring groove, the bottom of the end cover is horizontally limited by the positioning groove, so that the end cover will not horizontally slide relative to the positioning base; the inner wall of the collimating cylinder is matched with the shape of the peripheral side of the sealing plug to effectively limit and guide the lowered sealing plug; the accommodating ring groove is arranged to further horizontally limit the end cover and avoid structural obstruction between the top of the end cover and the bottom of the collimating cylinder; the relief hole is arranged to avoid direct contact between the pressing head and the insertion cylinder, thereby effectively pressing the sealing plug without damaging the insertion cylinder;

[0025] By setting the positioning convex ring, the positioning ring groove and the air groove, the vertical insertion position of the collimating cylinder is limited by the insertion and cooperation of the positioning convex ring and the positioning ring groove; by setting the air groove, the gas in the embedding groove pressed out by the exhaust hole is effectively discharged, so as to avoid the gas from hindering the sealing plug from being embedded in the embedding groove. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the embodiments of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0027] Figure 1 A half-section schematic view of a gas ionization chamber detector head provided for the embodiment 1 of the application;

[0028] Figure 2 A half-section schematic view of a mounting tool provided for the embodiment 8 of the application.

[0029] Markings in the drawings and corresponding names of parts:

[0030] 1-positioning base; 2-collimating cylinder; 3-press head; 4-positioning groove; 5-containing ring groove; 6-clearance hole; 7-positioning convex ring; 8-positioning ring groove; 9-air groove; 10-end cover; 11-embedding part; 12-embedding groove; 121-first embedding groove; 122-second embedding groove; 13-first sealing ring; 14-second sealing ring; 15-exhaust hole; 20-sealing plug; 21-plug body; 22-plug disc; 221-insertion cylinder; 30-armored cable. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the application clearer, further detailed description will be given to the application in combination with embodiments and drawings, the illustrative embodiments of the application and the description thereof are only used to explain the application, and do not limit the application.

[0032] Embodiment 1

[0033] Please refer to Figure 1The embodiment of the present application provides a gas ionization chamber detector head, which comprises: an end cover 10, the end cover 10 is used for closing an ionization chamber of a gas ionization chamber detector, the bottom of the end cover 10 is provided with an embedding part 11, the embedding part 11 is used for embedding a gas port of the ionization chamber, the top of the end cover 10 is concavely provided with an embedding groove 12, a plurality of sealing rings are convexly arranged in the embedding groove 12, a gas exhaust hole 15 is opened in the groove bottom of the embedding groove 12, and the gas exhaust hole 15 penetrates through the end cover 10; a second sealing plug 20 is matched with the embedding groove 12, the sealing plug 20 is concavely provided with a plurality of sealing grooves, the sealing grooves correspond to and match the sealing rings one by one, when the sealing plug 20 is embedded in the embedding groove 12 and the bottom of the sealing plug 20 abuts against the groove bottom of the embedding groove 12, the sealing rings are embedded in the corresponding sealing grooves; a plurality of armored cables 30 are matched with the sealing plug 20, and the two ends of the armored cables 30 penetrate through the sealing plug 20 and the end cover 10 respectively and are tightly welded with the sealing plug 20.

[0034] The gas ionization chamber detector head provided by the embodiment improves the sealing performance between the sealing plug 20 and the armored cables 30, further seals the gap between the armored cables 30 and the sealing plug 20 by welding, and further improves the sealing performance.

[0035] Embodiment 2

[0036] Please refer to Figure 1 The embodiment of the present application provides a gas ionization chamber detector head, which is further optimized based on the embodiment 1, and the difference only lies in that:

[0037] In order to further improve the sealing performance of the sealing ring and the sealing groove, the axial direction of the sealing ring is parallel to the depth direction of the embedding groove 12; the outer diameter of the sealing ring gradually increases along the axial direction, so that the outer wall of the sealing ring is arranged in a conical surface; the diameter of the conical surface gradually increases along the direction from the groove opening to the groove bottom of the embedding groove 12; the shape of the sealing groove matches the shape of the corresponding sealing ring.

[0038] Through the above setting, the sealing ring and the sealing groove form an inclined surface extrusion fit, so as to improve the sealing performance between the two.

[0039] Embodiment 3

[0040] Please refer to Figure 1 , the embodiment of the application provides a gas ionization chamber detector head, which is a further optimization of embodiment 2, and the difference is only that:

[0041] In order to further improve the sealing performance of the sealing ring and the sealing groove, the radial thickness of the sealing ring is uniformly distributed.

[0042] Through the above setting, the sealing ring is inserted into the sealing groove at an angle, and the downward pressure of the sealing plug 20 is converted into the axial downward pressure and the radial inward force of the sealing ring, so that the sealing ring extrudes the inner wall of the sealing groove downward and inward, thereby further improving the sealing performance between the two.

[0043] Embodiment 4

[0044] Please refer to Figure 1 , the embodiment of the application provides a gas ionization chamber detector head, which is a further optimization of embodiment 3, and the difference is only that:

[0045] In order to further optimize the specific structure of the embedding groove 12 and the sealing plug 20, the embedding groove 12 comprises a first embedding groove 121 and a second embedding groove 122, the first embedding groove 121 and the second embedding groove 122 are both cylindrical grooves, the first embedding groove 121 and the second embedding groove 122 are coaxially arranged, the diameter of the first embedding groove 121 is greater than the diameter of the second embedding groove 122; one end of the first embedding groove 121 away from the second embedding groove 122 is the groove opening of the embedding groove 12, and one end of the second embedding groove 122 away from the first embedding groove 121 is the groove bottom of the embedding groove 12; the sealing plug 20 comprises a plug body 21 and a plug disc 22 arranged coaxially, the plug body 21 matches the second embedding groove 122, and the plug disc 22 matches the first embedding groove 121.

[0046] Through the above setting, the embedding structure of the sealing plug 30 and the embedding groove 12 is in a stepped structure, further increasing the contact area of the embedding surfaces of the two, thereby further improving the sealing performance between the two.

[0047] Embodiment 5

[0048] Please refer to Figure 1 The embodiment of the present application provides a gas ionization chamber detector head, which is further optimized based on the embodiment 4, and the difference is only that:

[0049] In order to further optimize the setting position of the sealing ring, the sealing ring comprises a first sealing ring 13 and a second sealing ring 14; the first sealing ring 13 is coaxially arranged at the groove bottom of the first embedding groove 121, and the second sealing ring 14 is coaxially arranged at the groove bottom of the second embedding groove 122.

[0050] Through the above setting, the sealing ring is further arranged at each step on the basis of the stepped structure, so as to further improve the sealing performance of the stepped surface fitting part.

[0051] Embodiment 6

[0052] Please refer to Figure 1 The embodiment of the present application provides a gas ionization chamber detector head, which is further optimized based on the embodiment 5, and the difference is only that:

[0053] In order to further optimize the setting diameter of the sealing ring, the inner diameter of the bottom of the first sealing ring 13 is the same as the diameter of the second embedding groove 122, the outer diameter of the bottom of the first sealing ring 13 is the same as the diameter of the first embedding groove 121, and the outer diameter of the bottom of the second sealing ring 14 is the same as the diameter of the second embedding groove 122.

[0054] Through the above setting, the first sealing ring 13 and the second sealing ring 14 are arranged at the edges of the first embedding groove 121 and the second embedding groove 122 respectively. On the one hand, the groove wall and the corner structure of the first embedding groove 121 and the second embedding groove 122 respectively support the bottom of the first sealing ring 13 and the second sealing ring 14, so as to prevent the first sealing ring 13 and the second sealing ring 14 from being extruded and deformed outwardly and slipping when bearing downward pressure, thereby avoiding that the first sealing ring 13 and the second sealing ring 14 cannot be smoothly embedded into the corresponding sealing groove. On the other hand, by limiting the position of the bottom of the first sealing ring 13 and the second sealing ring 14, the groove wall of the first embedding groove 121 and the second embedding groove 122 respectively limits the top of the first sealing ring 13 and the second sealing ring 14, so that when the top of the first sealing ring 13 and the second sealing ring 14 bears pressure, even if it is extruded and deformed outwardly, it will not be excessively deformed, thereby further avoiding that the first sealing ring 13 and the second sealing ring 14 cannot be smoothly embedded into the corresponding sealing groove.

[0055] Embodiment 7

[0056] Please refer to Figure 1 The embodiment of the present application provides a gas ionization chamber detector head, which is further optimized based on the embodiment 1, and the difference is only that:

[0057] In order to further improve the sealing performance of the connection between the sealing plug 20 and the armored cable 30, the plug disc 22 is provided with a plurality of insertion sleeves 221 on the side away from the plug body 21, the axial direction of the insertion sleeve 221 is parallel to the axial direction of the plug disc 22; the insertion sleeve 221 corresponds to the armored cable 30 one by one, the inner diameter of the insertion sleeve 221 matches the diameter of the corresponding armored cable 30; the distance between the armored cable 30 and the axis of the sealing plug 20 is less than the distance between the inner wall of the sealing ring and the axis of the sealing plug 20.

[0058] Through the above setting, the contact area between the sealing plug 20 and the armored cable 30 is further improved by using the insertion sleeve 221, thereby further improving the sealing performance between the two.

[0059] It should be noted that the insertion sleeve 221 is integrally formed with the plug disc 22.

[0060] It should be noted that the sealing plug 20 is provided with a plug hole matched with the armored cable 30, and the end cover 10 is also provided with a plug hole matched with the armored cable 30.

[0061] Embodiment 8

[0062] Please refer to Figure 2 The embodiment of the application provides a mounting tool of any one of the above-mentioned gas ionization chamber detector end covers, which comprises a positioning base 1, the top of the positioning base 1 is used for bearing the end cover 10; a collimating cylinder 2, the collimating cylinder 2 is vertically and detachably arranged on the top of the positioning base 1, the end cover 10 is located at the lower part of the collimating cylinder 2, and the sealing plug 20 can be vertically arranged above the embedding groove 12 along the collimating cylinder 2; and a pressing head 3, the pressing head 3 is coaxially and detachably sleeved and slid on the top of the collimating cylinder 2, and the pressing head 3 is used for pressing the sealing plug 20 downwards so that the sealing plug 20 is embedded into the embedding groove 12.

[0063] By setting the positioning base 1, the collimating cylinder 2 and the pressing head 3, and setting the detachable cooperation of the three, in use, first, the positioning base 1 is placed on the workbench, then the end cover 10 is placed on the top of the positioning base 1, then the collimating cylinder 2 is vertically placed on the top of the positioning base 1, so that the end cover 10 is located in the lower part of the collimating cylinder 2, then the sealing plug 20 is lowered along the collimating cylinder 2 until the sealing plug 20 falls above the embedding groove 12, finally the pressing head 3 is vertically inserted into the collimating cylinder 2 along the collimating cylinder 2 to press the sealing plug 20 until the sealing plug 20 is pressed into the embedding groove 12, then the pressing head 3 and the collimating cylinder 2 can be detached, the pressed end cover 10 and the sealing plug 20 are taken out, after taking out, the armored cable 30 is connected and welded with the sealing plug 20, the installation of the above-mentioned gas ionization chamber probe head can be completed, which can effectively solve the problem that the gas ionization chamber probe head is inconvenient to install and the sealing performance of the installed gas ionization chamber probe head cannot be guaranteed.

[0064] In order to position the end cover 10 and the positioning base 1 and effectively guide the sealing plug 20 lowered in the collimating cylinder 2, a positioning groove 4 is opened in the middle of the top of the positioning base 1, the shape of the positioning groove 4 matches the shape of the bottom of the end cover 10, the shape of the inner wall of the collimating cylinder 2 matches the shape of the peripheral side of the sealing plug 20, the inner wall of the lower part of the collimating cylinder 2 is outwardly provided with a containing ring groove 5, the shape of the containing ring groove 5 matches the shape of the peripheral side of the end cover 10, the groove height of the containing groove 5 is greater than the height of the end cover 10, a let-out hole 6 is coaxially opened in the middle of the pressing head 3, the let-out hole 6 penetrates the pressing head 3, and all the armored cables 30 are located in the let-out hole 6.

[0065] Through the above settings, the bottom of the end cover 1 is horizontally limited by the positioning groove 4, so that the end cover 10 cannot horizontally slide relative to the positioning base unnecessarily; the lowered sealing plug 20 is effectively limited and guided by setting the shape of the inner wall of the collimating cylinder 2 matching the peripheral side of the sealing plug 20; the end cover 10 is further horizontally limited and the structure obstruction between the top of the end cover 10 and the bottom of the collimating cylinder 2 is avoided by opening the containing ring groove 5; the direct contact between the pressing head 3 and the plug-in cylinder 221 is avoided by setting the let-out hole 6, so that the sealing plug 20 is effectively pressed under the premise of avoiding damaging the plug-in cylinder 221.

[0066] In order to horizontally limit the positioning base 1 and the collimating cylinder 2, the top of the positioning base 1 is provided with a positioning convex ring 7, the bottom of the collimating cylinder 2 is provided with a positioning ring groove 8 matching the positioning convex ring 7; the bottom of the positioning base 1 is provided with an air groove 9, the air groove 9 penetrates the positioning base 1 along the thickness direction, and the top end of the air groove 9 communicates with the exhaust hole 15.

[0067] Through the above setting, the vertical insertion position of the collimating cylinder 2 is limited by the plug-in cooperation of the positioning convex ring 7 and the positioning ring groove 8; by setting the air groove 9, the gas in the embedding groove 12 extruded by the exhaust hole 15 is effectively discharged, avoiding the gas from hindering the sealing plug 20 from being embedded in the embedding groove 12.

[0068] In order to limit the pressing distance of the pressure head 3, the top side wall of the pressure head 3 extends outward to form a horizontally arranged limiting disc, when the bottom of the limiting disc is pressed down to abut against the top end of the collimating cylinder 2, the sealing plug 20 is just embedded in the embedding groove 12; at the same time, the limiting disc can effectively increase the contact area of the top end of the pressure head, and reduce the pressing pressure.

[0069] It should be noted that the materials of the pressure head 3, the collimating cylinder 2 and the positioning base 1 are martensitic stainless steel, the material of the sealing plug 20 is 316L stainless steel, the material of the end cover 10 is 6061 aluminum, and the material of the sealing ring is pure aluminum.

[0070] The use method of the above mounting tool includes the following steps:

[0071] S1, the positioning base 1 is placed on the top of the working platform of the press machine;

[0072] S2, the end cover 10 is placed on the top of the positioning base 1, so that the end cover 10 is arranged in the positioning groove 4;

[0073] S3, the collimating cylinder 2 is vertically arranged on the top of the positioning base 1, so that the positioning convex ring 7 is limited and connected with the positioning ring groove 8, and the end cover 10 is arranged in the containing groove 5;

[0074] S4, the sealing plug 20 is placed on the top of the end cover 10 along the collimating cylinder 2;

[0075] S5, the pressure head 3 is placed on the top of the sealing plug 20 along the collimating cylinder 2;

[0076] S6, the pressure head 3 is pressed down by the press machine, until the limiting disc abuts against the top end of the collimating cylinder 2, and the sealing plug 20 is embedded in the embedding groove 12;

[0077] S7, the pressure head 3 and the collimating cylinder 2 are disassembled, and the sealing plug 20 and the end cover 10 embedded as a whole are taken out;

[0078] S8, the armored cable 30 is connected and welded with the sealing plug 20, and the assembly is completed.

[0079] The above detailed description of the specific embodiments of the present application has been given to understand the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An installation fixture for a gas ionization chamber detector head, characterized in that: The gas ionization chamber detector head includes: End cap (10), the end cap (10) is used to seal the ionization chamber of the gas ionization chamber detector. The bottom of the end cap (10) is provided with an embedding part (11), the embedding part (11) is used to embed the gas port of the ionization chamber. The top of the end cap (10) is recessed with a groove (12), and a plurality of sealing rings are protruding in the groove (12). The bottom of the groove (12) is provided with an exhaust hole (15), and the exhaust hole (15) passes through the end cap (10). A sealing plug (20) is matched with the groove (12). The sealing plug (20) is recessed with a plurality of sealing grooves. The sealing grooves correspond one-to-one with the sealing rings. When the sealing plug (20) is embedded in the groove (12) and the bottom of the sealing plug (20) abuts against the bottom of the groove (12), the sealing ring is embedded in the corresponding sealing groove. Multiple armored cables (30), with both ends of the armored cables (30) passing through the sealing plug (20) and the end cap (10) respectively, and tightly welded to the sealing plug (20); The installation fixture includes: Positioning base (1), the top of which is used to support the end cap (10). The collimating cylinder (2) is detachably and vertically mounted on the top of the positioning base (1). The end cap (10) is located at the lower part of the collimating cylinder (2). The sealing plug (20) can be vertically placed above the groove (12) along the collimating cylinder (2). The pressure head (3) is coaxially and detachably slidably mounted on the top of the collimating cylinder (2). The pressure head (3) is used to press down the sealing plug (20) so that the sealing plug (20) is embedded in the groove (12).

2. The mounting fixture for the gas ionization chamber detector head according to claim 1, characterized in that, The axial direction of the sealing ring is parallel to the depth direction of the groove (12); The outer diameter of the sealing ring gradually increases along the axial direction so that the outer wall of the sealing ring is tapered. The diameter of the conical surface gradually increases along the direction from the opening to the bottom of the groove (12); The shape of the sealing groove matches the shape of the corresponding sealing ring.

3. The mounting fixture for the gas ionization chamber detector head according to claim 2, characterized in that, The radial thickness of the sealing ring is uniformly distributed.

4. The mounting fixture for the gas ionization chamber detector head according to claim 3, characterized in that, The groove (12) includes a first groove (121) and a second groove (122). The first groove (121) and the second groove (122) are both cylindrical grooves. The first groove (121) and the second groove (122) are coaxially formed. The diameter of the first groove (121) is larger than the diameter of the second groove (122). The end of the first groove (121) away from the second groove (122) is the opening of the groove (12), and the end of the second groove (122) away from the first groove (121) is the bottom of the groove (12). The sealing plug (20) includes a plug body (21) and a plug disc (22) arranged coaxially. The plug body (21) matches the second groove (122), and the plug disc (22) matches the first groove (121).

5. The mounting fixture for the gas ionization chamber detector head according to claim 4, characterized in that, The sealing ring includes a first sealing ring (13) and a second sealing ring (14); The first sealing ring (13) is coaxially disposed at the bottom of the first groove (121), and the second sealing ring (14) is coaxially disposed at the bottom of the second groove (122).

6. The mounting fixture for the gas ionization chamber detector head according to claim 5, characterized in that, The inner diameter of the bottom of the first sealing ring (13) is the same as the diameter of the second groove (122), and the outer diameter of the bottom of the first sealing ring (13) is the same as the diameter of the first groove (121). The outer diameter of the bottom of the second sealing ring (14) is the same as the diameter of the second groove (122).

7. The mounting fixture for the gas ionization chamber detector head according to claim 6, characterized in that, The stopper disc (22) has multiple inserts (221) on the side away from the stopper body (21), and the axial direction of the inserts (221) is parallel to the axial direction of the stopper disc (22). The plug (221) corresponds one-to-one with the armored cable (30), and the inner diameter of the plug (221) matches the diameter of the corresponding armored cable (30); The distance between the armored cable (30) and the axis of the sealing plug (20) is less than the distance between the inner wall of the sealing ring and the axis of the sealing plug (20).

8. The mounting fixture for the gas ionization chamber detector head according to claim 1, characterized in that, The positioning base (1) has a positioning groove (4) in the middle of its top, and the shape of the positioning groove (4) matches the shape of the bottom of the end cap (10). The shape of the inner wall of the collimating cylinder (2) matches the shape of the periphery of the sealing plug (20); the lower inner wall of the collimating cylinder (2) is provided with an outward-facing receiving annular groove (5), the shape of the receiving annular groove (5) matches the shape of the periphery of the end cap (10), and the groove height of the receiving annular groove (5) is greater than the height of the end cap (10); The pressure head (3) has a relief hole (6) coaxially formed in the middle, the relief hole (6) passes through the pressure head (3), and all the armored cables (30) are located in the relief hole (6).

9. The mounting fixture for the gas ionization chamber detector head according to claim 8, characterized in that, The top of the positioning base (1) is provided with a positioning protrusion (7), and the bottom of the collimating cylinder (2) is provided with a positioning ring groove (8) that matches the positioning protrusion (7). The bottom of the positioning base (1) has an air groove (9), which extends through the positioning base (1) along the thickness direction. The top of the air groove (9) is connected to the exhaust hole (15).

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