CN218239342U - Heat storage module packaging and reliability testing assembly for logging instrument - Google Patents

Abstract

The utility model discloses a heat-retaining module encapsulation and reliability test subassembly for logging instrument belongs to well logging technical field. The assembly comprises a through shell, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are respectively welded at two ends of the through shell to form a heat storage module shell, and the assembly also comprises a special sealing adapter and a special sealing plug; the upper end cover is provided with an encapsulation hole, the uppermost end of the encapsulation hole is chamfered and rounded, a step unthreaded hole is arranged in the middle of the encapsulation hole, the lower end of the encapsulation hole is a threaded hole, and the diameter of the step unthreaded hole is larger than the aperture of the threaded hole; the special sealing adapter is used for connecting the heat storage module shell with an external test pump and performing three sealing operations during reliability test; the special sealing plug is used for packaging the heat storage module shell and performing three sealing. The utility model discloses can solve the problem that can't change the heat-retaining material behind the heat-retaining module encapsulation to and reliability problems such as easy leakage under the high temperature vibration environment, and can compromise the aesthetic property.

Description

Heat storage module packaging and reliability testing assembly for logging instrument

Technical Field

The utility model belongs to the technical field of the well logging, more specifically relates to a heat-retaining module encapsulation and reliability test subassembly for logging instrument.

Background

The logging instrument is used for exploring the distribution of oil and gas resources at the bottom of the earth, and internal electronic devices of the logging instrument face a high-temperature environment in the pit and are prone to thermal failure after long-time work, so that thermal management measures are needed to be adopted to protect the electronic devices. Aiming at heat leakage in a high-temperature environment, a metal vacuum bottle is generally adopted in the circumferential direction of the logging instrument, and heat insulation plugs are adopted at two ends of the logging instrument; however, the electronic device itself generates heat, which is difficult to dissipate to the environment, and therefore, a temporary heat storage module must be used for temporary heat storage. However, the existing heat storage module mostly has the problems of slow heat storage rate, low heat storage density per unit volume, incapability of replacing heat storage materials after packaging, reliability and the like.

For example, chinese utility model patent with publication number CN110145298a discloses "a heat absorbent packaging method and apparatus for a logging instrument with high heat conductivity and high temperature resistance", which adopts paraffin doped expanded graphite as a heat storage material, and packages the heat storage material by using a seal pin and welding. Therefore, it is required to develop a heat storage module having a high heat storage density and a high heat storage rate. Meanwhile, the logging instrument can vibrate randomly during downhole operation, the heat storage module has leakage risks under the condition, and a standard heat storage module reliability testing method does not exist at present. In addition, the common welding and packaging process can cause obvious welding seams to exist outside the heat storage module, and the appearance is influenced.

Therefore, new package structure designs are needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

To defect more than prior art or improve the demand, the utility model provides a heat-retaining module encapsulation and reliability test subassembly for logging instrument, one of its purpose lies in, encapsulates the heat-retaining module through special crossover sub of design and special sealed choke plug to the heat-retaining material can't be changed after solving the encapsulation that present heat-retaining module exists and the encapsulation is accomplished before the test reliability scheduling problem of being not convenient for.

In order to achieve the above object, the utility model provides a heat-retaining module encapsulation and reliability test subassembly for logging instrument, including leading to shell, upper end cover, lower end cover weld respectively lead to shell both ends constitution heat-retaining module casing, its characterized in that still includes special sealed adapter and special sealed end cap;

the upper end cover is provided with an encapsulation hole, the uppermost end of the encapsulation hole is chamfered and rounded, a step unthreaded hole is arranged in the middle of the encapsulation hole, the lower end of the encapsulation hole is a threaded hole, and the diameter of the step unthreaded hole is larger than the diameter of the threaded hole;

the special sealing adapter is used for connecting the heat storage module shell with an external test pump during reliability test; special sealed adapter one end adopts internal thread and gasket to seal, and the other end adopts external screw thread, adapter boss and adapter seal groove to combine the sealing washer to seal, wherein: the first seal is a thread seal; the second seal is that the adapter boss is matched with the bottom surface of the step unthreaded hole of the filling hole, the adapter boss is positioned at the root of the thread, and the size of the adapter boss is larger than that of the thread; the third seal is formed by matching an adapter seal groove with a seal ring and the side wall of the step unthreaded hole for sealing, and the adapter seal groove is positioned at the upper part of the boss and used for installing the seal ring;

the special sealing plug is used for packaging the heat storage module shell; the special sealing plug comprises a plug sealing thread at the lower end, a plug sealing boss at the middle part and a plug sealing groove above the plug sealing boss, the plug sealing boss is positioned at the root part of the plug sealing thread, and the diameter of the plug sealing boss is larger than that of the plug sealing thread; the special sealing plug is combined with the sealing ring to carry out three seals on the filling and sealing hole, wherein: the first seal is a thread seal; the middle second seal is formed by matching and sealing the plug sealing boss with the bottom surface of the step unthreaded hole of the hole filling and sealing hole; the third seal is that the end cap seal groove is matched with the seal ring and the side wall of the step unthreaded hole for sealing.

Furthermore, the thickness of the through shell is larger than 2mm, the thickness of the end cover is larger than 5mm, and meanwhile, the axial direction or the length and the width of the through shell are reserved with polishing allowance.

Furthermore, the heat storage module shell is filled with low-melting-point alloy heat storage materials.

Further, the volume of the molten low melting point alloy heat storage material is not more than 95% of the volume of the heat storage module.

Furthermore, the sealing ring is made of fluororubber materials, the sealing ring and the sealing groove of the plug are in interference fit, the interference degree is 0.6-0.7 mm, and the third sealing fit tolerance of the special sealing plug and the filling hole is 0.03-0.12 mm.

Furthermore, the through shell, the upper end cover, the lower end cover and the special sealing plug are all made of the same metal material.

Further, the metal material is stainless steel.

Generally, compared with the prior art, the above technical solution contemplated by the present invention can obtain the following beneficial effects:

1. the utility model discloses design based on special sealed adapter and special sealed end cap, can utilize special sealed adapter to carry out the effective sealing in the three sealed realization reliability test processes before accomplishing the encapsulation, and the heat-retaining module in the finished product leads to and adopts welded connection's mode to seal between shell and the end cover, and the embedment mouth adopts screw thread + boss + seal groove to combine three sealed of sealing washer, can guarantee that inside endothermic agent does not leak when using under the high temperature condition, high reliability has, and the special sealed end cap of accessible dismouting comes to change the heat-retaining material at any time.

2. The product attractiveness can be improved on the premise of ensuring the sealing performance by reserving allowance for polishing after welding or polishing after cutting allowance.

3. The high-heat-conductivity metal material is used as the packaging shell, and the low-melting-point alloy with high heat conductivity and high heat storage density per unit volume is used as the heat storage material, so that the heat storage capacity and the heat storage rate of the heat storage module are enhanced, and the temperature control effect of the electronic device can be effectively improved.

Drawings

FIG. 1 is a schematic diagram of a method for using a thermal storage module package and reliability testing assembly for a logging tool according to a preferred embodiment of the present invention;

fig. 2 isbase:Sub>A schematic structural view of the special sealing plug, wherein (base:Sub>A) isbase:Sub>A front view, (b) isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A, and (c) isbase:Sub>A top view;

FIG. 3 is a schematic view of an end-welded heat storage module;

FIG. 4 is a schematic view of a circumferentially welded heat storage module;

FIG. 5 is a schematic view of a square circumferential welded heat storage module;

FIG. 6 is a schematic view of a potting aperture configuration;

fig. 7 isbase:Sub>A schematic structural view ofbase:Sub>A special sealing adapter, in which (base:Sub>A) isbase:Sub>A front view, (b) isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A, and (c) isbase:Sub>A top view;

FIG. 8 is a flow chart of the preparation of a low melting point alloy heat storage material;

fig. 9 is a table of mass changes of the heat storage modules before and after the test.

The same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:

1. a special sealing plug, 11 plug sealing threads, 12 plug sealing grooves, 13 plug sealing bosses, 14 inner hexagonal grooves,

2. an end face welding heat storage module 21, a first upper end cover 211, a first filling hole 212, a first upper end cover welding groove 22, a first through shell 221, a first through shell upper end welding groove 222, a first through shell cavity 223, a first through shell binding groove 224, a first through shell wiring groove 225, a first through shell lower end welding groove 23, a first lower end cover 231, a first lower end cover welding groove,

3. the method comprises the steps of circumferentially welding a heat storage module, 31, a second upper end cover, 311, a second filling hole, 312, a welding groove of the second upper end cover, 32, a second through shell, 321, a welding groove of the upper end of the second through shell, 322, a cavity of the second through shell, 323, a binding groove of the second through shell, 324, a wiring groove of the second through shell, 325, a welding groove of the lower end of the second through shell, 33, a second lower end cover, 331 and a welding groove of the second lower end cover,

4. a square circumferential welding heat storage module, 41, a third upper end cover, 411, a third filling hole, 412, a third upper end cover welding groove, 42, a third shell, 421, a third shell upper end welding groove, 422, a third shell cavity, 423, a third shell lower end welding groove, 43, a third lower end cover, 431, a third lower end cover welding groove,

5. a special sealing adapter 51, an outer inner angle boss 52, an adapter sealing groove 53, an adapter sealing external thread 54, an adapter sealing internal thread 55, an adapter sealing boss 56, an adapter through hole,

6. low melting point alloy heat storage material.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

The utility model discloses a heat-retaining module encapsulation and reliability test subassembly for logging instrument of preferred embodiment includes: the special sealing plug 1, the end face welding heat storage module 2, the special sealing adapter 5 and the low-melting-point alloy heat storage material 6.

The special sealing plug comprises a sealing thread at the lower end, a sealing boss at the middle part and a plug sealing groove above the sealing boss, the sealing boss is positioned at the root part of the sealing thread, and the diameter of the sealing boss is larger than that of the sealing thread; the special sealing plug is combined with the sealing ring to carry out three sealing on the filling and sealing hole.

5 one end of special sealing adapter adopts pipe thread and gasket to seal, and the other end adopts screw thread, boss and adapter seal groove to combine the sealing washer to seal, wherein: the first seal is fine thread; the second sealing is that a boss is matched with the step of the filling and sealing hole, the boss is positioned at the root part of the thread, has a size larger than that of the thread and is matched with the step of the filling and sealing hole; and the third sealing groove is matched with a sealing ring for sealing, the sealing groove is positioned at the upper part of the boss, and the sealing ring is arranged and is in interference fit with a unthreaded hole in the middle of the filling and sealing hole to ensure sealing.

The detailed structure design and the method of using the heat storage module package and reliability test assembly of the present invention are described in detail in several embodiments below.

[ example 1 ]

Store up thermal module in this embodiment and be end face welding heat-retaining module 2, including first upper end cover 21, first leading to shell 22 and first bottom end cover 23, process corresponding first hole 211 of irritating on the first upper end cover 21, first hole 211 of irritating is equipped with the step unthreaded hole, lower extreme for the screw hole in top chamfer and fillet, the centre, and the diameter of step unthreaded hole is greater than the aperture of screw hole.

The method for using the heat storage module package and the reliability test assembly in the embodiment is as follows:

step 1: welding a first upper end cover 21, a first through shell 22 and a first lower end cover 23 to form an end surface welding heat storage module 2;

step 2: mounting the special sealing adapter 5 to the first sealing hole 211, and performing a pressure resistance test on the end face welding heat storage module 2 in the step 1 by using the special sealing adapter 5;

and step 3: injecting the low-melting-point alloy heat storage material 6 into the end face subjected to the pressure resistance test in the step 2 through the first filling hole 211, and welding the end face into a first shell passing cavity 222 in the heat storage module 2;

and 4, step 4: packaging the end face welding heat storage module 2 in the step 3 by adopting a special sealing plug 5 matched with a sealing ring;

and 5: and (4) carrying out high-low temperature cycle test and high-temperature vibration test on the end face welding heat storage module 2 packaged in the step (4), preferably, carrying out high-low temperature cycle test and then carrying out high-temperature vibration test.

Preferably, the thickness of the first through shell 22 is 4mm, the first through shell binding wire slot 223, the first through shell wiring slot 224, the first upper end cover 21 and the first lower end cover 23 are 18.5mm thick, so that the first through shell can have high strength. The traditional end face welding process is to process the end cover and the through shell of the heat storage module to the final size, then weld and polish the welding line, and the welding line is obvious and the whole attractiveness is poor. In the new process of the embodiment, the heat storage module 2 is firstly processed to the middle size, the outer diameter of the heat storage module is 84mm, the single-side allowance of the outer diameter is kept to be 0.5mm, and meanwhile, the allowance of 0.5mm is also kept in length, so that the welding groove is enlarged, and meanwhile, the subsequent grinding and polishing of the welding line are facilitated.

Preferably, the first sealing hole 211 is composed of three parts, the uppermost end is chamfered and rounded to facilitate installation of the special sealing plug 1, the middle is a step unthreaded hole, and the lower end is a threaded hole; the special sealing plug 1 adopts three seals, namely a plug sealing thread 11, a plug sealing groove 12 and a plug sealing lug boss 13. The plug sealing thread 11 is connected with a threaded hole at the lower end of the first hole 211 for first sealing, the plug sealing boss 13 compresses the step surface in the first hole 211 for second sealing, and the plug sealing groove 12 is matched with the sealing ring and the side wall of the middle step unthreaded hole of the first hole 211 for interference fit for third sealing. In addition, an inner hexagonal groove 14 is formed in the end portion of the special sealing plug 1 and used for screwing the plug sealing thread 11, and installation space can be saved.

Preferably, in step 1, the welding mode is argon arc welding, the welding mode is V-shaped butt joint, and the first upper end cover welding groove 212, the first through shell upper end welding groove 221, the first through shell lower end welding groove 225 and the first lower end cover welding groove 231 are all 1.25mm. During welding, the first upper end cover 21 and the first lower end cover 23 are respectively embedded into the first through shell 22, and end face welding is completed by welding one circle on the end face. After welding, a lathe and a milling machine are adopted to remove the single margin of 0.5mm of the reserved outer diameter and the margin of 0.5mm reserved in the length direction to obtain the end face welding heat storage module 2 with the outer diameter of 83mm, and then grinding and polishing are carried out, so that the welding seam disappears, and the welding is more attractive.

Preferably, the special sealing adapter 5 structure is that one end adopts adapter sealing internal thread 54 (the preferred pipe thread of this embodiment) to add gasket seal, and the other end adopts adapter sealing external thread 53+ outer interior angle boss 51+ adapter seal groove 52 to combine the sealing washer to carry out three sealings. Wherein the first seal is a fine thread; the second sealing is that the adapter boss (namely the outer inner angle boss 51) is matched with the bottom surface of the step unthreaded hole of the first filling hole 211, the outer inner angle boss 51 is positioned at the root of the thread, and the size of the outer inner angle boss is slightly larger than the thread; the third seal is that the adapter seal groove 52 is matched with a seal ring for sealing, the adapter seal groove 52 is positioned at the upper part of the outer inner angle boss 51, and the seal ring is arranged to be in interference fit with a light hole of a middle step of the first sealing hole 211 to ensure sealing. The outer and inner corner bosses 51 are respectively screwed with the pressure test pump pipeline and the first filling hole 211. The pressure resistance test is that a pressure test pump is adopted to pump water pressure 5MPa to the welded end face heat storage module 2 through the special sealing adapter 5, the holding time is 15 minutes to 30 minutes, no water seeps out from the surface of the heat storage module 2, and the pressure gauge is not changed, so that the heat storage module 2 can bear the pressure of 5MPa, and the heat storage material can be encapsulated.

Preferably, the low-melting-point alloy heat storage material 6 is obtained by taking four metals of Bi, pb, sn and Cd as melt raw materials and performing a melting process according to the mixture ratio of 4. And in the melting process, protective gas is firstly introduced into the closed tube furnace, and then the furnace is continuously heated to more than 400 ℃ and kept for more than 30 minutes, so that all metals are completely melted, and the low-melting-point alloy heat storage material 6 with high heat storage rate and high heat storage density per unit volume is obtained.

Preferably, the filling volume of the low-melting-point alloy heat storage material 6 is not more than 95% of the volume of the end-face welding heat storage module 2, and a certain space is reserved in the end-face welding heat storage module 2 to compensate for expansion caused by heat and contraction caused by cold of the low-melting-point alloy heat storage material 6.

Preferably, in step 4, the sealing washer is high temperature resistant corrosion resistant fluororubber material, and the sealing washer is interference fit with end cap seal groove 12, and the interference degree is 0.6mm to 0.7mm, and upper end portion is the tight fit between special sealed end cap 1 and the first hole 211 of irritating, and the fit tolerance is 0.03mm to 0.12mm, and the lower extreme is end cap sealing thread 11 (this embodiment is standard screw thread) and connects, under the sealed circumstances of assurance, compare in the dead traditional welding scheme of end cap welding, this embodiment does not have the welding seam, and the aesthetic property promotes greatly to can realize dismantling the installation at any time so that change heat-retaining material.

Preferably, in the step 5, the high-low temperature cycle test is performed in a high-low temperature cycle box, the cycle temperature is 25 ℃ to 175 ℃, the cycle time is 10h, and the cycle times are 50. After the test, the surface of the end face heat storage module 2 has no leakage, and the quality before and after the test is unchanged, which shows that the end face heat storage module 2 has higher reliability at high temperature and the sealing property under high and low temperature cyclic stress is also ensured.

Preferably, in the step 5, the high-temperature vibration test is performed on a high-temperature vibration platform and is divided into a high-temperature axial vibration test and a radial vibration test. The high-temperature vibration platform is heated to 150 ℃ for two hours until the temperature of the heat storage module exceeds 120 ℃, then 5g of acceleration is applied for 30min, the acceleration is continuously adjusted to 10g for 30min, and the vibration time is 60min. After the test, the surface of the end face welding heat storage module 2 has no deformation, no leakage and no cracking, and the quality before and after the test is unchanged, which shows that the end face welding heat storage module can keep the sealing performance in the real high-temperature vibrating underground environment.

Preferably, the special sealing plug 1, the end face welding heat storage module 2 and the special sealing adapter 5 are all made of stainless steel.

[ example 2 ]

The heat storage module is a circumferential welding heat storage module 3 in this embodiment, and comprises a second upper end cover 31, a second through shell 32 and a second lower end cover 33, a corresponding second hole 311 is machined in the second upper end cover 31, a step unthreaded hole is arranged at the uppermost chamfer angle and the fillet of the second hole 311, in the middle of the second hole, a threaded hole is arranged at the lower end of the second hole, and the diameter of the step unthreaded hole is larger than the diameter of the threaded hole.

The method for using the heat storage module package and the reliability test assembly in the embodiment is as follows:

step 1: welding a second upper end cover 31, a second through shell 32 and a second lower end cover 33 to form a circumferential welding heat storage module 3;

step 2: mounting the special sealing adapter 5 to the second sealing hole 311, and performing a pressure resistance test on the circumferential welding heat storage module 3 in the step 1 by using the special sealing adapter 5;

and step 3: injecting the low-melting-point alloy heat storage material 6 into the second through shell cavity 322 in the circumferentially welded heat storage module 3 which is subjected to the pressure resistance test in the step 2 through the second filling hole 311;

and 4, step 4: packaging the heat storage module 3 welded in the circumferential direction in the step 3 by adopting a special sealing plug 5 matched with a sealing ring;

and 5: and (5) performing high-low temperature cycle test and high-temperature vibration test on the circumferential welding heat storage module 3 packaged in the step (4), preferably performing high-low temperature cycle test and then performing high-temperature vibration test.

Preferably, the thickness of the second through shell 32 is 4mm, the second through shell binding wire groove 323 and the second through shell routing wire groove 324 are provided, the thickness of the second upper end cover 31 is 18.5mm, and the thickness of the second lower end cover 33 is 33mm, so that the second upper end cover can have higher strength. The traditional circumferential welding process is to process the end cover and the through shell of the heat storage module to the final size, then polish the welding line after welding, and can see an obvious welding line, so that the whole attractiveness is poor. In the new process of the embodiment, the heat storage module 3 firstly processes the outer diameter to the middle size of 84mm, and reserves the single-side allowance of 0.5mm for increasing the welding groove and facilitating subsequent grinding and polishing of the welding line.

Preferably, the second sealing hole 311 is composed of three parts, the upper end is chamfered to facilitate installation of the special sealing plug 1, the middle is a step unthreaded hole, and the lower end is a threaded hole; the special sealing plug 1 adopts three seals of a plug sealing thread 11, a plug sealing groove 12 and a plug sealing boss 13, the plug sealing thread 11 is connected with a threaded hole at the lower end of the second filling hole 311 to form a first seal, the plug sealing boss 13 compresses a step surface in the second filling hole 311 to form a second seal, and the plug sealing groove 12 is matched with a sealing ring to form a third seal in interference fit with the side wall of a middle step unthreaded hole of the second filling hole 311. In addition, an inner hexagonal groove 14 is formed at the end of the special sealing plug 1 for screwing the plug sealing thread 11, so that the installation space can be saved.

Preferably, in step 1, the welding mode is argon arc welding, the welding mode is V-shaped butt joint, and the second upper end cover welding groove 312, the second through shell upper end welding groove 321, the second through shell lower end welding groove 325 and the second lower end cover welding groove 331 are all 2.5mm. The second upper end cap 31 and the second lower end cap 33 are respectively butted against the second through shell 32 and welded in the circumferential direction. Meanwhile, in order to facilitate welding, platforms convenient for welding are respectively reserved above and below the second through shell 32, so that the welding quality can be improved. After welding, a lathe and a milling machine are adopted to remove the single margin of 0.5mm of the reserved outer diameter to obtain the circumferential welding heat storage module 3 with the outer diameter of 83mm, and then grinding and polishing are carried out, so that a welding seam can disappear, and the welding is more attractive.

Preferably, the special sealing adapter 5 is structured such that one end is sealed by an adapter sealing internal thread 54 (preferably, a pipe thread in this embodiment) and a gasket, and the other end is sealed by an adapter sealing external thread 53+ an external internal angle boss 51+ an adapter sealing groove 52 and a sealing ring. Wherein the first seal is a fine thread; the second sealing is that the adapter boss (namely the outer inner angle boss 51) is matched with the bottom surface of the step unthreaded hole of the second filling hole 311, the outer inner angle boss 51 is positioned at the root of the thread, and the size of the outer inner angle boss is slightly larger than the thread; the third seal is that the adapter seal groove 52 is matched with a seal ring for sealing, the adapter seal groove 52 is positioned at the upper part of the outer inner angle boss 51, and the seal ring is arranged to be in interference fit with a light hole of a middle step of the second filling hole 311 to ensure sealing. The outer and inner corner bosses 51 are respectively screwed with the pressure test pump pipeline and the second filling hole 311. Withstand voltage test is for adopting the pressure testing pump to beat water pressure 5MPa to the circumference heat-retaining module 3 that the welding finishes through special sealed adapter 5, and the holding time is 15 minutes to 30 minutes, and 3 surfaces on the heat-retaining module are anhydrous to ooze to the manometer does not change, explains that heat-retaining module 3 can bear 5MPa pressure, can carry out the embedment of heat-retaining material.

Preferably, the low-melting-point alloy heat storage material 6 is obtained by taking Bi, pb, sn and Cd as melt raw materials and performing a melting process according to the ratio of 4. And in the melting process, protective gas is firstly introduced into the closed tube furnace, and then the furnace is continuously heated to more than 400 ℃ and kept for more than 30 minutes, so that all metals are completely melted, and the low-melting-point alloy heat storage material 6 with high heat storage rate and high heat storage density per unit volume is obtained.

Preferably, the filling volume of the molten low-melting-point alloy heat storage material 6 is not more than 95% of the volume of the circumferential welding heat storage module 3, and a certain space is reserved in the circumferential welding heat storage module 3 to compensate for expansion and contraction of the low-melting-point alloy heat storage material 6.

Preferably, in step 4, the sealing washer is high temperature resistant corrosion resistant fluororubber material, and the sealing washer is interference fit with end cap seal groove 12, and the interference degree is 0.6mm to 0.7mm, and the upper end unthreaded hole part is the tight fit between special sealed end cap 1 and the second hole 311 of irritating, and the cooperation tolerance is 0.03mm to 0.12mm, and the lower extreme is end cap sealing thread 11 (this embodiment is standard screw thread) and connects, under the sealed circumstances of assurance, compare in the dead traditional welding scheme of end cap weld, this embodiment does not have the welding seam, and the aesthetic property promotes greatly to can realize dismantling the installation at any time so that change heat-retaining material.

Preferably, in the step 5, the high-low temperature cycle test is performed in a high-low temperature cycle box, the cycle temperature is 25 ℃ to 175 ℃, the cycle time is 10 hours, and the cycle frequency is 50 times. After the test, the surface of the circumferential heat storage module 3 has no leakage, and the quality before and after the test is unchanged, which shows that the end face heat storage module 3 has higher reliability at high temperature and the sealing property under high-low temperature cyclic stress is also ensured.

Preferably, in the step 5, the high-temperature vibration test is performed on a high-temperature vibration platform and is divided into a high-temperature axial vibration test and a radial vibration test. The high-temperature vibration platform is heated to 150 ℃ firstly, heating is continued for two hours until the temperature of the heat storage module exceeds 120 ℃, then 5g of acceleration is applied for 30min, the acceleration is continuously adjusted to 10g and is continued for 30min, and the vibration time is 60min in total. After the test, the surface of the circumferential welding heat storage module 3 has no deformation, leakage or cracking, and the quality is unchanged before and after the test, which shows that the end surface welding heat storage module can keep the sealing property in the real high-temperature vibrating underground environment.

Preferably, the special sealing plugs 1, the circumferential welding heat storage modules 3 and the special sealing adapters 5 are all made of stainless steel.

[ example 3 ]

The heat storage module in this embodiment is a square circumferential welding heat storage module 4, and includes a third upper end cover 41, a third through shell 42, and a third lower end cover 43; a corresponding third filling hole 411 is processed on the third upper end cover 41, the uppermost chamfer angle and the fillet of the third filling hole 411, a step unthreaded hole is arranged in the middle, the lower end is a threaded hole, and the diameter of the step unthreaded hole is larger than the aperture of the threaded hole.

The method for using the heat storage module package and the reliability test assembly in the embodiment is as follows:

step 1: welding a third upper end cover 41, a third through shell 42 and a third lower end cover 43 to form a square circumferential welding heat storage module 4;

step 2: mounting the special sealing adapter 5 to the third grouting hole 411, and performing pressure resistance test on the square circumferential welding heat storage module 4 in the step 1 by using the special sealing adapter 5;

and 3, step 3: injecting the low-melting-point alloy heat storage material 6 into the third through-hole 422 of the square circumferential welding heat storage module 4 subjected to the pressure resistance test in the step 2 through the third filling and sealing hole 411;

and 4, step 4: packaging the square circumferential welding heat storage module 4 in the step 3 by adopting a special sealing plug 5 matched with a sealing ring;

and 5: and (4) carrying out high-low temperature cycle test and high-temperature vibration test on the square circumferential welding heat storage module 4 packaged in the step (4), preferably, carrying out high-low temperature cycle test and then carrying out high-temperature vibration test.

Preferably, the thickness of the third through housing 42 is 3mm, the thickness of the third upper end cap 41 is 18.5mm, and the thickness of the third lower end cap 43 is 5mm, so that the third through housing can have high strength. The traditional circumferential welding process is to process the end cover and the through shell of the heat storage module to the final size, then polish the welding line after welding, and can see an obvious welding line, so that the whole attractiveness is poor. In the new process of the embodiment, the square circumferential heat storage module 4 is firstly processed to the middle size, the length and the width of the square circumferential heat storage module are respectively 51mm and 26mm, and the length and the width of the square circumferential heat storage module respectively keep the single-side allowance of 0.5mm, so that the welding groove is enlarged and the subsequent grinding and polishing of the welding line are facilitated.

Preferably, the third hole 411 is composed of three parts, the upper end is chamfered to facilitate installation of the special sealing plug 1, the middle is a step unthreaded hole, and the lower end is a threaded hole; the special sealing plug 1 adopts three seals, namely a plug sealing thread 11, a plug sealing groove 12 and a plug sealing lug boss 13. The plug sealing thread 11 is connected with a threaded hole at the lower end of the third hole 411 for first sealing, the plug sealing boss 13 compresses the step of the third hole 411 for second sealing, and the plug sealing groove 12 is matched with the sealing ring and the side wall of the unthreaded hole of the middle step of the third hole 411 for interference fit for third sealing. In addition, an inner hexagonal groove 14 is formed in the end portion of the special sealing plug 1 and used for screwing the plug sealing thread 11, and installation space can be saved.

Preferably, in the step 1, the welding mode is argon arc welding, the welding mode is V-shaped butt joint, the third upper end cover welding groove 412, the third shell upper end welding groove 421, the third shell lower end welding groove 423 and the third lower end cover welding groove 431 are all 1.5mm, the third upper end cover 41 and the third lower end cover 43 are respectively butt joint with the third shell 42, welding is performed in the circumferential direction, after welding is completed, a lathe and a milling machine are adopted to cut off the single-side margin of 0.5mm reserved length and width to obtain the square circumferential heat storage modules 4 with the length and width of 50mm and 25mm respectively, and then polishing is performed, so that the welding seam can be lost and welded more attractively.

Preferably, the special sealing adapter 5 is structured such that one end is sealed by an adapter sealing internal thread 54 (preferably, a pipe thread in this embodiment) and a gasket, and the other end is sealed by an adapter sealing external thread 53+ an external internal angle boss 51+ an adapter sealing groove 52 and a sealing ring. Wherein the first seal is a fine thread; the second sealing is that the adapter boss (namely the outer inner angle boss 51) is matched with the bottom surface of the step unthreaded hole of the third filling hole 411, the outer inner angle boss 51 is positioned at the root of the thread, and the size of the outer inner angle boss is slightly larger than the thread; the third way is that the adapter sealing groove 52 is matched with a sealing ring for sealing, the adapter sealing groove 52 is positioned at the upper part of the outer inner angle boss 51, and the sealing ring is arranged to be in interference fit with the middle light hole of the third grouting hole 411 to ensure sealing. The outer and inner corner bosses 51 are respectively screwed with the pressure test pump pipeline and the third filling hole 411. Withstand voltage test is for adopting the pressure testing pump to beat water pressure 1MPa to the square circumference heat-retaining module 4 that the welding finishes through special sealed adapter 5, and the holding time is 15 minutes to 30 minutes, and 4 surfaces of heat-retaining module are anhydrous to ooze to the manometer does not change, explains that heat-retaining module 4 can bear 1MPa pressure, can carry out the embedment of heat-retaining material.

Preferably, the low-melting-point alloy heat storage material is obtained by taking Bi, pb, sn and Cd as melt raw materials and performing a melting process according to the following mixture ratio of 4. And in the melting process, protective gas is firstly introduced into the closed tube furnace, and then the furnace is continuously heated to more than 400 ℃ and kept for more than 30 minutes, so that all metals are completely melted, and the low-melting-point alloy heat storage material 6 with high heat storage rate and high heat storage density per unit volume is obtained.

Preferably, the filling volume of the molten low-melting-point alloy heat storage material 6 is not more than 95% of the volume of the square circumferential heat storage module 4, and a certain space is reserved in the square circumferential welding heat storage module 4 to compensate for expansion and contraction of the low-melting-point alloy heat storage material 6.

Preferably, in step 4, the sealing washer is high temperature resistant corrosion resistant fluorubber material, and the sealing washer is interference fit with end cap seal groove 12, and the interference degree is 0.6mm to 0.7mm, and the upper end part is the tight fit between special sealed end cap 1 and the third hole 411 of irritating, and the cooperation tolerance is 0.03mm to 0.12mm, and the lower extreme is end cap sealing thread 11 (this embodiment is standard screw thread) and connects, under the sealed circumstances of assurance, compare in the dead traditional welding scheme of end cap welding, this embodiment does not have the welding seam, and the aesthetic property promotes greatly to can realize dismantling the installation at any time so that change heat-retaining material.

Preferably, in the step 5, the high-low temperature cycle test is performed in a high-low temperature cycle box, the cycle temperature is 25 ℃ to 175 ℃, the cycle time is 10h, and the cycle times are 50. The surface of the square circumferential welding heat storage module 4 has no leakage after the test, and the quality before and after the test is unchanged, which shows that the end face heat storage module 3 has higher reliability at high temperature and the sealing property is also ensured under high and low temperature cyclic stress.

Preferably, in the step 5, the high-temperature vibration test is performed on a high-temperature vibration platform and is divided into a high-temperature axial vibration test and a radial vibration test. The high-temperature vibration platform is heated to 150 ℃ for two hours until the temperature of the heat storage module exceeds 120 ℃, then 5g of acceleration is applied for 30min, the acceleration is continuously adjusted to 10g for 30min, and the vibration time is 60min. After the test, the surface of the square circumferential welding heat storage module 4 has no deformation, no leakage and no cracking, and the quality is unchanged before and after the test, which shows that the end surface welding heat storage module can keep the sealing performance in the real high-temperature vibrating underground environment.

Preferably, the special sealing plug 1, the square circumferential welding heat storage module 4 and the special sealing adapter 5 are all made of stainless steel.

In the above three preferred embodiments, even if the shapes of the heat storage modules are not consistent, the welding process is not consistent, and the positions of the through holes are different, the core packaging method still injects the molten low-melting-point alloy heat storage material into the heat storage modules through the potting holes, and three sealing operations are completed by using the special sealing plugs. The core reliability test methods are a pressure resistance test of the shell of the heat storage module, a high-low temperature cycle test of the heat storage module which is encapsulated well and a high-temperature vibration test. Fig. 9 is a table of mass changes of the heat storage modules before and after the test. According to the method to heat-retaining module encapsulation to can guarantee through the reliability test that proposes the utility model discloses the heat-retaining module of method preparation has high reliability, can work for a long time under high temperature vibration environment, can solve that the heat-retaining speed that old heat-retaining module exists is slow, unit volume heat-retaining density is low, can not change heat-retaining material and reliability scheduling problem after the encapsulation, can compromise the aesthetic property simultaneously.

It will be understood by those skilled in the art that the foregoing is merely exemplary of the present invention, and is not intended to limit the invention to the particular forms disclosed, and all changes, equivalents and modifications that fall within the spirit and scope of the invention are intended to be embraced thereby.

Claims (7)

1. A heat storage module packaging and reliability testing assembly for a logging instrument comprises a through shell, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are respectively welded at two ends of the through shell to form a heat storage module shell;

the upper end cover is provided with an encapsulation hole, the uppermost end of the encapsulation hole is chamfered and rounded, a step unthreaded hole is arranged in the middle of the encapsulation hole, the lower end of the encapsulation hole is a threaded hole, and the diameter of the step unthreaded hole is larger than the aperture of the threaded hole;

the special sealing adapter is used for connecting the heat storage module shell with an external test pump during reliability test; special sealed adapter one end adopts internal thread and gasket to seal, and the other end adopts external screw thread, adapter boss and adapter seal groove to combine the sealing washer to seal, wherein: the first seal is a thread seal; the second seal is that the adapter boss is matched with the bottom surface of the step unthreaded hole of the filling hole, the adapter boss is positioned at the root of the thread, and the size of the adapter boss is larger than that of the thread; the third seal is formed by matching an adapter seal groove with a seal ring and the side wall of the step unthreaded hole for sealing, and the adapter seal groove is positioned at the upper part of the boss and used for installing the seal ring;

the special sealing plug is used for packaging the heat storage module shell; the special sealing plug comprises a plug sealing thread at the lower end, a plug sealing boss at the middle part and a plug sealing groove above the plug sealing boss, the plug sealing boss is positioned at the root part of the plug sealing thread, and the diameter of the plug sealing boss is larger than that of the plug sealing thread; the special sealing plug is combined with the sealing ring to carry out three seals on the filling and sealing hole, wherein: the first seal is a thread seal; the middle second seal is formed by matching and sealing a plug sealing boss with the bottom surface of a step unthreaded hole of the hole filling and sealing hole; the third seal is that the end cap seal groove is matched with the seal ring and the side wall of the step unthreaded hole for sealing.

2. The heat storage module packaging and reliability testing assembly for the logging instrument as recited in claim 1, wherein the thickness of the through shell is greater than 2mm, the thickness of the end cap is greater than 5mm, and a grinding and polishing allowance is reserved for the axial direction, the radial direction or the length and the width of the through shell.

3. The heat storage module package and reliability testing assembly of claim 1 wherein the heat storage module housing is filled with a molten low-melting alloy heat storage material.

4. The heat storage module package and reliability test assembly of claim 3 wherein the volume of the molten low melting point alloy heat storage material is no more than 95% of the heat storage module volume.

5. The heat storage module package and reliability test assembly for a logging instrument as claimed in claim 1, wherein the sealing ring is made of a fluororubber material, the sealing ring and the plug sealing groove are in interference fit, the interference degree is 0.6mm to 0.7mm, and the third seal fit tolerance of the special sealing plug and the filling hole is 0.03mm to 0.12mm.

6. The assembly of claim 1, wherein the through housing, the top cap, the bottom cap, and the special seal plugs are made of the same metal material.

7. The heat storage module package and reliability testing assembly of claim 6 wherein the metal material is stainless steel.

Images