Gas ionization chamber detector end socket and installation tool

Abstract

The invention discloses a gas ionization chamber detector end socket, which comprises an end cover, a sealing plug and a plurality of armored cables, and is characterized in that the end cover is used for sealing an ionization chamber of a gas ionization chamber detector, the bottom of the end cover is provided with an embedding part, the embedding part is used for embedding a gas port of the ionization chamber, the top of the end cover is concavely provided with an embedding groove, and a plurality of sealing rings are convexly arranged in the embedding groove; an exhaust hole is formed in the bottom of the caulking groove and penetrates through the end cover; the sealing plugs are matched with the caulking grooves, a plurality of sealing grooves are concavely formed in the sealing plugs, the sealing grooves correspond to the sealing rings one to one and are matched with the sealing rings, and when the sealing plugs are embedded into the caulking grooves and the bottoms of the sealing plugs abut against the groove bottoms of the caulking grooves, the sealing rings are embedded into the corresponding sealing grooves; and two ends of the armored cable respectively penetrate through the sealing plug and the end cover and are tightly welded with the sealing plug. The problem that the sealing head of the gas ionization chamber detector is not ideal in sealing performance can be effectively solved. An installation tool can effectively solve the problems that a gas ionization chamber detector end socket is inconvenient to install and poor in plugging performance.

Description

Technical Field

[0001] The invention relates to the technical field of reactor neutron injection rate measurement, and in particular to a gas ionization chamber detector head and an installation tool. Background Art

[0002] Gas detectors are used to measure the neutron injection rate of nuclear reactors. They convert the reactor's neutron injection rate into a pulse signal and input it into the reactor power measurement system, power protection system, and power regulation system. The reactor power is measured by measuring the current signal or pulse signal output by the detector.

[0003] For gas ionization chamber detectors, the working gas pressure and purity inside the detector and the gas leakage rate after molding will directly affect the nuclear and electrical properties of the ionization chamber. The gas leakage rate is mainly attributed to the sealing condition of the ionization chamber head. However, the ionization chamber head not only has to seal the gas inside the ionization chamber to ensure that the internal gas leakage rate is extremely low, but also has to undertake the task of leading out the signal line. Therefore, the sealing performance of the existing ionization chamber head is not ideal. Summary of the invention

[0004] The first purpose of the present invention is to provide a gas ionization chamber detector head to solve the problem of unsatisfactory sealing performance of the gas ionization chamber detector head.

[0005] The second purpose of the present invention is to provide an installation tool to solve the problem that the gas ionization chamber detector head is inconvenient to install and the sealing performance of the gas ionization chamber detector head after installation cannot be guaranteed.

[0006] The present invention is achieved through the following technical solutions:

[0007] A gas ionization chamber detector head, comprising: an end cover, the end cover is used to seal the ionization chamber of the gas ionization chamber detector, the bottom of the end cover is provided with an embedding portion, the embedding portion is used to embed the gas port of the ionization chamber, the top of the end cover is recessed with an embedding groove, a plurality of sealing rings are convexly provided in the embedding groove, the bottom of the embedding groove is provided with an exhaust hole, and the exhaust hole passes through the end cover; a sealing plug, the sealing plug matches the embedding groove, the sealing plug is recessed with a plurality of sealing grooves, the sealing grooves correspond to and match the sealing rings one by one, when the sealing plug is embedded in the embedding groove and the bottom of the sealing plug abuts against the bottom of the embedding groove, the sealing ring is embedded in the corresponding sealing groove; a plurality of armored cables, the two ends of the armored cables respectively pass through the sealing plug and the end cover, and are tightly welded to 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 set in a conical surface; the diameter of the conical surface gradually increases from the groove mouth 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 evenly distributed.

[0010] Optionally, the embedding groove includes a first embedding groove and a second embedding groove, the first embedding groove and the second embedding groove are both cylindrical grooves, the first embedding groove and the second embedding groove are coaxially opened, and the diameter of the first embedding groove is greater than the diameter 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 includes a plug body and a plug disk arranged coaxially, the plug body matches the second embedding groove, and the plug disk matches the first embedding groove.

[0011] Optionally, the sealing ring includes a first sealing ring and a second sealing ring; the first sealing ring is coaxially arranged at the bottom of the first embedding groove, and the second sealing ring is coaxially arranged at the 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, the outer diameter of the bottom of the first sealing ring is the same as the diameter of the first embedding groove; and 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 inserts are provided on a side of the plug disc away from the plug body, and the axial direction of the inserts is arranged parallel to the axial direction of the plug disc; the inserts correspond to the armored cables one by one, and the inner diameter of the inserts matches the diameter of the corresponding armored cables; the distance between the armored cable and the axis of the sealing plug is smaller than the distance between the inner wall of the sealing ring and the axis of the sealing plug.

[0014] An installation tool for any of the above-mentioned gas ionization chamber detector heads, comprising: a positioning base, the top of the positioning base is used to support the end cover; a collimation cylinder, the collimation cylinder is detachably and vertically arranged on the top of the positioning base, the end cover is located at the lower part of the collimation cylinder, and the sealing plug can be vertically dropped along the collimation cylinder just above the embedding groove; a pressure head, the pressure head is coaxially and detachably slidably mounted on the top of the collimation 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 provided in the middle of the top of the positioning base, and 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 peripheral side of the sealing plug; the inner wall of the lower part of the collimating cylinder is provided with an accommodating ring groove outwardly, and the shape of the accommodating ring groove matches the shape of the peripheral side of the end cover, and the groove height of the accommodating groove is greater than the height of the end cover; a clearance hole is coaxially provided in the middle of the pressure head, and the clearance hole passes through the pressure head, and all the armored cables are located in the clearance hole.

[0016] Optionally, a positioning convex ring is provided on the top of the positioning base, and a positioning ring groove matching the positioning convex ring is opened at the bottom of the collimating cylinder; an air groove is opened at the bottom of the positioning base, the air groove passes through the positioning base along the thickness direction, and the top of the air groove is connected to the exhaust hole.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] The present invention provides a gas ionization chamber detector seal head, which is provided with an end cover and an embedding part at the bottom thereof, and the embedding part is used to embed the gas port of the ionization chamber to increase the sealing area, thereby improving the sealing performance between the end cover and the detector; on this basis, an embedding groove is provided at the top of the end cover, and a sealing plug embedded in the embedding groove is provided, and a plurality of armored cables are provided at the same time, so that the armored cables are passed through and arranged in the sealing plug, and the sealing plug is embedded in the embedding groove, and the sealing plug is squeezed and sealed by the embedding groove, and the armored cable is further indirectly squeezed by the squeezed sealing plug, thereby improving the sealing performance between the sealing plug and the armored cable, and further sealing the gap between the armored cable and the sealing plug by welding, thereby further improving the sealing performance; on this basis, a plurality of sealing rings are provided in the embedding groove, and a plurality of sealing grooves are provided in the sealing plug, and the embedding between the two is used to further improve the connection performance and sealing performance between the sealing plug and the end cover; through the mutual cooperation of the above-mentioned features, the gas ionization chamber detector seal head can effectively solve the problem of unsatisfactory sealing performance of the gas ionization chamber detector seal head;

[0019] By setting the specific shape of the sealing ring, the sealing ring is inserted into the sealing groove at an angle, and the downward pressure of the sealing plug is converted into the axial downward pressure and radial inward force of the sealing ring, so that the sealing ring presses the inner wall of the sealing groove downward and inward, thereby further improving the sealing performance between the two;

[0020] By providing the embedding groove including the first embedding groove and the second embedding groove, the sealing plug includes a plug body and a plug disc arranged coaxially, so that the embedding structure of the sealing plug and the embedding groove is a stepped structure, further increasing the contact area of ​​the embedding surfaces of the two, thereby further improving the sealing performance between the two;

[0021] By setting the specific setting position of the sealing ring, a sealing ring is further set at each step on the basis of the stepped structure to further improve the sealing performance of the step surface matching point, so that the first sealing ring and the second sealing ring are respectively set at the edges of the first embedded groove and the second embedded groove. On the one hand, the groove walls and corner structures of the first embedded groove and the second embedded groove are used to structurally support the bottoms of the first sealing ring and the second sealing ring respectively to prevent them from being squeezed outward, deformed and slipped when subjected to downward pressure, so as to avoid the first sealing ring and the second sealing ring from being unable to be smoothly embedded in the corresponding sealing groove; on the other hand, by limiting the position of the bottoms of the first sealing ring and the second sealing ring, the groove walls of the first embedded groove and the second embedded groove are used to limit the tops of the first sealing ring and the second sealing ring respectively, so that even if the tops of the two are squeezed outward and deformed when subjected to pressure, they will not be excessively deformed, thereby further avoiding the first sealing ring and the second sealing ring from being unable to be smoothly embedded in the corresponding sealing groove;

[0022] By arranging an insert sleeve on the top of the plug disc, the insert sleeve 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 present invention provides an installation tool for the above-mentioned gas ionization chamber detector head. By setting a positioning base, a collimating cylinder and a pressure head, and setting the three to be detachable and matched, when in use, first place the positioning base on a workbench, and then place the end cover on the top of the positioning base, and then vertically place the collimating cylinder on the top of the positioning base so that the end cover is located in the lower part of the collimating cylinder, and then lower the sealing plug along the collimating cylinder until the sealing plug falls just above the embedding groove, and finally insert the pressure head vertically downward into the collimating cylinder along the collimating cylinder to press the sealing plug down until the sealing plug is pressed into the embedding groove, and then the pressure head and the collimating cylinder can be disassembled, and the pressed end cover and sealing plug can be taken out, and after taking out, the armored cable and the sealing plug can be connected and welded, and the installation of the above-mentioned gas ionization chamber detector head can be completed, which can effectively solve the problem that the gas ionization chamber detector head is inconvenient to install and the sealing performance of the gas ionization chamber detector head after installation cannot be guaranteed;

[0024] By setting 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 have unnecessary horizontal slippage relative to the positioning base; by setting the inner wall of the collimating cylinder to match the shape of the surrounding side of the sealing plug, the lowered sealing plug is effectively limited and guided; by providing the accommodating ring groove, the end cover is further horizontally limited, and structural obstruction between the top of the end cover and the bottom of the collimating cylinder is avoided; by setting the clearance hole, the pressure head is prevented from directly contacting the insert cylinder, so that the sealing plug is effectively pressed down without damaging the insert cylinder;

[0025] By providing a positioning convex ring, a positioning ring groove and an air groove, the vertical insertion position of the alignment straight tube is limited by utilizing the plug-in cooperation of the positioning convex ring and the positioning ring groove; by providing the air groove, the gas in the embedding groove squeezed out by the exhaust hole is effectively discharged, thereby preventing the gas from hindering the sealing plug from being embedded in the embedding groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0027] Figure 1 A half-section schematic diagram of a gas ionization chamber detector head provided in Example 1 of the present invention;

[0028] Figure 2 A half-section schematic diagram of the installation tool provided in Example 8 of the present invention.

[0029] Marks and corresponding parts names in the attached drawings:

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

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0032] Example 1

[0033] Please refer to Figure 1The embodiment of the present invention provides a gas ionization chamber detector head, comprising: an end cover 10, the end cover 10 is used to seal the ionization chamber of the gas ionization chamber detector, the end cover 10 is provided with an embedding portion 11 at the bottom, the embedding portion 11 is used to embed the gas port of the ionization chamber, the top of the end cover 10 is concavely provided with an embedding groove 12, the embedding groove 12 is convexly provided with a plurality of sealing rings, the groove bottom of the embedding groove 12 is provided with an exhaust hole 15, the exhaust hole 15 passes through the end cover 10; the second includes a sealing plug 20, the The sealing plug 20 matches the embedding groove 12, and the sealing plug 20 is concavely provided with a plurality of sealing grooves, and 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 bottom of the embedding groove 12, the sealing ring is embedded in the corresponding sealing groove; the third includes a plurality of armored cables 30, and the two ends of the armored cables 30 respectively pass through the sealing plug 20 and the end cover 10, and are tightly welded to the sealing plug 20.

[0034] The gas ionization chamber detector seal head provided in the present embodiment is provided with an end cover 10, and an embedding portion 11 is provided at the bottom thereof, and the embedding portion 11 is used to embed the gas port of the ionization chamber to increase the sealing area, thereby improving the sealing performance between the end cover 10 and the detector; on this basis, an embedding groove 12 is provided at the top of the end cover 10, and a sealing plug 20 is provided to match the embedding groove 12, and a plurality of armored cables 30 are provided at the same time, so that the armored cables 30 are passed through and arranged in the sealing plug 20, and the sealing plug 20 is embedded in the embedding groove 12, and the embedding groove 12 is used to squeeze and seal the sealing plug 20, and the squeezed sealing plug 20 is further used to seal the sealing plug 20. The armored cable 30 is indirectly squeezed in the step, thereby improving the sealing performance between the sealing plug 20 and the armored cable 30, and the gap between the armored cable 30 and the sealing plug 20 is further sealed by welding, thereby further improving the sealing performance; on this basis, by arranging a plurality of sealing rings in the embedding groove 12 and opening a plurality of sealing grooves in the sealing plug 20, the connection performance and sealing performance between the sealing plug 20 and the end cover 10 are further improved by the embedding between the two; through the mutual cooperation of the above-mentioned features, the gas ionization chamber detector head can effectively solve the problem of unsatisfactory sealing performance of the gas ionization chamber detector head.

[0035] Example 2

[0036] Please refer to Figure 1 The embodiment of the present invention provides a gas ionization chamber detector head, which is a further optimization of embodiment 1, and the only difference is that:

[0037] In order to further improve the sealing performance when the sealing ring cooperates with 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 set in a conical surface; the diameter of the conical surface gradually increases from the groove mouth to the bottom of the embedding groove 12; the shape of the sealing groove matches the shape of the corresponding sealing ring.

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

[0039] Example 3

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

[0041] In order to further improve the sealing performance when the sealing ring cooperates with the sealing groove, the radial thickness of the sealing ring is evenly distributed.

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

[0043] Example 4

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

[0045] In order to further optimize the specific structure of the embedding groove 12 and the sealing plug 20, the embedding groove 12 includes 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 opened, and the diameter of the first embedding groove 121 is greater than the diameter of the second embedding groove 122; the end of the first embedding groove 121 away from the second embedding groove 122 is the groove opening of the embedding groove 12, and the 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 includes a coaxially arranged plug body 21 and a plug disc 22, 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 arrangement, the embedding structure of the sealing plug 30 and the embedding groove 12 is made into a stepped structure, which further increases the contact area of ​​the embedding surfaces of the two, thereby further improving the sealing performance between the two.

[0047] Example 5

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

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

[0050] Through the above arrangement, a sealing ring is further arranged at each step on the basis of the stepped structure, so as to further improve the sealing performance at the mating point of the step surfaces.

[0051] Example 6

[0052] Please refer to Figure 1 The embodiment of the present invention provides a gas ionization chamber detector head, which is a further optimization of embodiment 5, and the only difference is 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; 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 arrangement, the first sealing ring 13 and the second sealing ring 14 are respectively arranged at the edges of the first embedding groove 121 and the second embedding groove 122. On the one hand, the groove walls and corner structures of the first embedding groove 121 and the second embedding groove 122 respectively support the bottoms of the first sealing ring 13 and the second sealing ring 14 to prevent them from being squeezed outward, deformed and slipped when subjected to downward pressure, so as to avoid the first sealing ring 13 and the second sealing ring 14 from failing to be smoothly embedded in the corresponding sealing grooves; on the other hand, by limiting the position of the bottoms of the first sealing ring 13 and the second sealing ring 14, the groove walls of the first embedding groove 121 and the second embedding groove 122 are used to limit the tops of the first sealing ring 13 and the second sealing ring 14 respectively, so that even if the tops of the two are squeezed outward and deformed when subjected to pressure, they will not be excessively deformed, thereby further avoiding the first sealing ring 13 and the second sealing ring 14 from failing to be smoothly embedded in the corresponding sealing grooves.

[0055] Example 7

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

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

[0058] Through the above arrangement, the insert 221 is used to further increase the contact area between the sealing plug 20 and the armored cable 30, thereby further improving the sealing performance therebetween.

[0059] It should be noted that the insert 221 and the plug disc 22 are integrally formed.

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

[0061] Example 8

[0062] Please refer to Example 1. Figure 2 The embodiment of the present invention provides an installation tool for a gas ionization chamber detector head as described above, comprising: a positioning base 1, the top of the positioning base 1 is used to support the end cover 10; the second comprises a collimating tube 2, the collimating tube 2 is detachably and vertically arranged on the top of the positioning base 1, the end cover 10 is located at the lower part of the collimating tube 2, and the sealing plug 20 can fall vertically along the collimating tube 2 just above the embedding groove 12; the third comprises a pressure head 3, the pressure head 3 is coaxially and detachably slidably mounted on the top of the collimating tube 2, and the pressure head 3 is used to press down the sealing plug 20 so that the sealing plug 20 is embedded in the embedding groove 12.

[0063] By setting a positioning base 1, a collimating tube 2 and a pressure head 3, and setting the three to be detachable and matched, when in use, first place the positioning base 1 on the workbench, and then place the end cover 10 on the top of the positioning base 1, then place the collimating tube 2 vertically on the top of the positioning base 1, so that the end cover 10 is located in the lower part of the collimating tube 2, and then lower the sealing plug 20 along the collimating tube 2 until the sealing plug 20 falls just above the embedding groove 12, and finally insert the pressure head 3 vertically downward into the collimating tube 2 along the collimating tube 2 to press the sealing plug 20 down until the sealing plug 20 is pressed into the embedding groove 12, and then the pressure head 3 and the collimating tube 2 can be disassembled, and the pressed end cover 10 and sealing plug 20 can be taken out, and after taking them out, the armored cable 30 is connected to the sealing plug 20 and welded, so as to complete the installation of the above-mentioned gas ionization chamber detector head, which can effectively solve the problem that the gas ionization chamber detector head is inconvenient to install and the sealing performance of the gas ionization chamber detector head after installation cannot be guaranteed.

[0064] In order to position the end cover 10 and the positioning base 1, and to effectively guide the sealing plug 20 of the lowered collimating tube 2, a positioning groove 4 is opened in the middle of the top of the positioning base 1, and 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 tube 2 matches the shape of the surrounding side of the sealing plug 20; the inner wall of the lower part of the collimating tube 2 is opened outwardly with a receiving ring groove 5, and the shape of the receiving ring groove 5 matches the shape of the surrounding side of the end cover 10, and the groove height of the receiving groove 5 is greater than the height of the end cover 10; a clearance hole 6 is coaxially opened in the middle of the pressure head 3, and the clearance hole 6 passes through the pressure head 3, and all the armored cables 30 are located in the clearance hole 6.

[0065] Through the above-mentioned settings, the bottom of the end cover 1 is horizontally limited by the positioning groove 4, so that the end cover 10 will not have unnecessary horizontal slippage relative to the positioning base; by setting the inner wall of the collimating tube 2 to match the shape of the surrounding side of the sealing plug 20, the lowered sealing plug 20 is effectively limited and guided; by providing an accommodating annular groove 5, the end cover 10 is further horizontally limited, and structural obstruction between the top of the end cover 10 and the bottom of the collimating tube 2 is avoided; by providing a clearance hole 6, direct contact between the pressure head 3 and the insert tube 221 is avoided, so that the sealing plug 20 is effectively pressed down without damaging the insert tube 221.

[0066] In order to horizontally limit the positioning base 1 and the collimating tube 2, a positioning convex ring 7 is provided on the top of the positioning base 1, and a positioning ring groove 8 matching the positioning convex ring 7 is provided on the bottom of the collimating tube 2; an air groove 9 is provided on the bottom of the positioning base 1, and the air groove 9 passes through the positioning base 1 along the thickness direction, and the top of the air groove 9 is connected to the exhaust hole 15.

[0067] Through the above-mentioned arrangement, the vertical insertion position of the alignment straight tube 2 is limited by the plug-in cooperation of the positioning convex ring 7 and the positioning ring groove 8; by providing the air groove 9, the gas in the embedding groove 12 squeezed out by the exhaust hole 15 is effectively discharged, thereby preventing 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 limit plate. When the bottom of the limit plate is pressed down to abut against the top of the collimating cylinder 2, the sealing plug 20 is just embedded in the groove 12; at the same time, the limit plate can effectively increase the contact area of ​​the top of the pressure head and reduce the downward pressure.

[0069] It should be noted that the material of the pressure head 3, the collimating cylinder 2 and the positioning base 1 is 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 method for using the above-mentioned installation tool comprises the following steps:

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

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

[0073] S3, vertically straighten the collimating tube 2 to the top of the positioning base 1, so that the positioning protruding ring 7 and the positioning ring groove 8 are limitedly engaged and matched, and the end cover 10 is arranged in the receiving groove 5;

[0074] S4, lowering the sealing plug 20 along the collimating tube 2 to the top of the end cover 10;

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

[0076] S6, applying pressure through the press to press the pressure head 3 downward until the limit plate abuts against the top end of the collimating cylinder 2, and the sealing plug 20 is embedded in the embedding groove 12;

[0077] S7, disassemble the pressure head 3 and the collimating cylinder 2, and take out the sealing plug 20 and the end cover 10 which are embedded as one;

[0078] S8. Connect and weld the armored cable 30 and the sealing plug 20 to complete the assembly.

[0079] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A gas ionization chamber detector head, characterized in that: include: An end cover (10), the end cover (10) being used to seal an ionization chamber of a gas ionization chamber detector, the end cover (10) being provided with an embedding portion (11) at the bottom, the embedding portion (11) being used to embed into a gas port of the ionization chamber, the end cover (10) being provided with an embedding groove (12) at the top, a plurality of sealing rings being convexly provided in the embedding groove (12), an exhaust hole (15) being provided at the bottom of the embedding groove (12), the exhaust hole (15) penetrating the end cover (10); A sealing plug (20), the sealing plug (20) matches 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, and when the sealing plug (20) is embedded in the embedding groove (12) and the bottom of the sealing plug (20) abuts against the bottom of the embedding groove (12), the sealing ring is embedded in the corresponding sealing groove; A plurality of armored cables (30), both ends of the armored cables (30) respectively pass through the sealing plug (20) and the end cover (10), and are tightly welded to the sealing plug (20).

2. 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 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 notch opening to the bottom of the embedding groove (12); The shape of the sealing groove matches the shape of the corresponding sealing ring.

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

4. The gas ionization chamber detector head according to claim 3, characterized in that: 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 opened, and 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 notch 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) which are coaxially arranged, wherein the plug body (21) matches the second embedding groove (122), and the plug disc (22) matches the first embedding groove (121).

5. The gas ionization chamber detector head according to claim 4, characterized in that: 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 bottom of the first embedding groove (121), and the second sealing ring (14) is coaxially arranged at the bottom of the second embedding groove (122).

6. 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 embedding groove (122), and the outer diameter of the bottom of the first sealing ring (13) is the same as the diameter of the first embedding groove (121); The outer diameter of the bottom of the second sealing ring (14) is the same as the diameter of the second embedding groove (122).

7. The gas ionization chamber detector head according to claim 6, characterized in that: A plurality of inserts (221) are provided on a side of the plug disc (22) away from the plug body (21), and the axial direction of the inserts (221) is arranged parallel to the axial direction of the plug disc (22); The insert tube (221) corresponds to the armored cable (30) one by one, and the inner diameter of the insert tube (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 smaller than the distance between the inner wall of the sealing ring and the axis of the sealing plug (20).

8. An installation tool for a gas ionization chamber detector head according to any one of claims 1 to 7, characterized in that: include: A positioning base (1), the top of the positioning base (1) being used to support the end cover (10); A collimating cylinder (2), the collimating cylinder (2) being detachably arranged vertically on the top of the positioning base (1), the end cover (10) being located at the lower part of the collimating cylinder (2), and the sealing plug (20) being able to vertically fall along the collimating cylinder (2) just above the embedding groove (12); A pressure head (3) is coaxially detachably slidably mounted on the top of the collimating cylinder (2), and the pressure head (3) is used to press down the sealing plug (20) so that the sealing plug (20) is embedded in the embedding groove (12).

9. The installation tool according to claim 8, characterized in that: A positioning groove (4) is provided in the middle of the top of the positioning base (1), and 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 provided with an accommodating annular groove (5) outwardly, the shape of the accommodating annular groove (5) matches the shape of the peripheral side of the end cover (10), and the groove height of the accommodating groove (5) is greater than the height of the end cover (10); A clearance hole (6) is coaxially opened in the middle of the pressure head (3), the clearance hole (6) passes through the pressure head (3), and all the armored cables (30) are located in the clearance hole (6).

10. The installation tool according to claim 9, characterized in that: The top of the positioning base (1) is provided with a positioning convex ring (7), and the bottom of the collimating cylinder (2) is provided with a positioning ring groove (8) matching the positioning convex ring (7); An air groove (9) is provided at the bottom of the positioning base (1), the air groove (9) penetrates the positioning base (1) along the thickness direction, and the top end of the air groove (9) is connected to the exhaust hole (15).

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