CN113884792B - Center rod end conductive structure and conductive performance testing system - Google Patents
Center rod end conductive structure and conductive performance testing system Download PDFInfo
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- CN113884792B CN113884792B CN202111131738.8A CN202111131738A CN113884792B CN 113884792 B CN113884792 B CN 113884792B CN 202111131738 A CN202111131738 A CN 202111131738A CN 113884792 B CN113884792 B CN 113884792B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
Abstract
The invention provides a conductive structure at the end part of a central rod and a conductive performance testing system, which comprise a first central rod and a second central rod, wherein the first central rod and the second central rod are detachably connected; a central conductive module: comprising a first conductive mechanism mounted within a first central rod, a second conductive mechanism mounted within a second central rod; end conductive module: the shaft sleeve piece is sleeved on the periphery of the first central rod in a sliding manner, and the third conductive mechanism comprises a conductive rod radially arranged on the periphery of the shaft sleeve piece and is used for being connected with an external conductive part; the fourth conductive mechanism is connected with the second conductive mechanism through a wire, and the third conductive mechanism is connected with the fourth conductive mechanism in a sliding contact manner. The invention can realize the internal conduction of the central rod and transmit the conducted current to the end part of the central rod; the conductivity performance testing system tests the stability of the central conductive module in different environments.
Description
Technical Field
The invention relates to the technical field of mining equipment, in particular to a conductive structure at the end part of a central rod and a conductive performance testing system.
Background
The global economy is developing at a high rate, the petroleum demand is greatly increasing, the production accuracy and speed become an inevitable requirement for drilling and oil production technology, and for the drilling technology, logging While Drilling (LWD), measurement While Drilling (MWD) are now more advanced. With the progress of drilling technology, more and more detectors, instruments and sensors are applied to underground drilling technology, and a great amount of electric energy is consumed when the equipment works, and at present, the signal transmission adopts electromagnetic waves, sound waves and mud pulse methods at most, but the signal transmission attenuation of the electromagnetic waves is particularly rapid, the sound wave transmission is easy to interfere, and the mud pulse transmission rate is too low so that the equipment is unstable and not applicable; the most adopted electric energy transmission is a downhole generator or a battery prepared in advance, and although the cable is hung on the inner wall or the outer wall of the drill rod, the cable is sheathed in the drill rod in sections, but the butt joint technology of the cable and the cable is still immature, so that stable ground and downhole information and electric power transmission channels must be established in order to know the underground oil reservoir condition, the abrasion condition of the drill bit, whether drilling is carried out according to a preset track and whether downhole electric power equipment can have sufficient electric energy in real time.
At present, for underground power transmission, only a drill rod or a drill string is subjected to related researches, the diameter of the drill rod or the drill string is generally larger than 100mm, and the transmission of power and signals can be simultaneously realized by adopting a wire butt joint method. While no research has been done on the design of power and signal transmission at the core rod, which is typically below 35mm in diameter, unlike drill rods or strings that require rotary drilling during operation, the core rod only performs an axial pull action, but its minimal size limitations result in significant difficulty in power transmission therein.
In view of the above-mentioned current situation, chinese patent application 2021107416770 provides a rotary sliding contact type central rod conductive device, including first conductive mechanism, second conductive mechanism, first central rod, second central rod, first central rod is connected with the second central rod is dismantled, be provided with mounting groove a corresponding to first conductive mechanism in the first central rod, first conductive mechanism installs in mounting groove a, be provided with mounting groove B corresponding to second conductive mechanism in the second central rod, second conductive mechanism installs in mounting groove B, make between first conductive mechanism and the second conductive mechanism press fit form contact connection structure when first central rod is connected with the second central rod, can realize that electric power is carried in the inside of central rod, avoid contacting with external drilling fluid etc. fluid, guaranteed good insulating properties.
In view of the harsh environment in which the center rod is used downhole, it is desirable that the center rod conductive device maintain good electrical conductivity at different temperatures and pressures. Therefore, in order to ensure the stable performance of the product, it is necessary to research a conductive performance testing system for the above-mentioned central rod conductive device under different temperatures and different pressures.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a conductive structure at the end part of a central rod and a conductive performance testing system for the performance stability test of the conductive device of the central rod under different temperature and different pressure environments.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a center rod end conductive structure comprising:
the first central rod and the second central rod are detachably connected;
a central conductive module comprising a first conductive mechanism mounted within the first central rod, a second conductive mechanism mounted within the second central rod;
the end conductive module comprises a shaft sleeve piece, a third conductive mechanism connected to the end of the shaft sleeve piece and a fourth conductive mechanism connected to the outer peripheral end of the second central rod, the shaft sleeve piece is sleeved on the outer periphery of the first central rod in a sliding manner, and the third conductive mechanism comprises a conductive rod radially arranged on the outer periphery of the shaft sleeve piece and used for being connected with an external conductive part; the fourth conductive mechanism is connected with the second conductive mechanism through a wire;
when the first central rod is connected with the second central rod, the first conductive mechanism and the second conductive mechanism are in press fit to form a contact connection structure, and the other ends of the first conductive mechanism and the second conductive mechanism are respectively connected with a cable to realize electric power conduction in the central rod; the first center rod and the second center rod are connected to form a center rod assembly, the center rod assembly can move relative to the shaft sleeve in the axial direction, the shaft sleeve is fixed, and after the center rod assembly is pulled to a certain position, the third conductive assembly and the fourth conductive assembly are in contact connection, so that electric power inside the center rod is conducted to the conductive rod outside the center rod.
Further, an axial channel A is arranged in the second center rod, a radial channel B penetrating through the second center rod is formed in the side wall, a flange A is arranged on the periphery of the second center rod, and a clamping groove is formed in the flange A corresponding to the outlet of the radial channel B; and a wire connected with the second conductive mechanism is arranged in the radial channel B.
Further, the fourth conductive mechanism comprises a connecting block A, a connecting ring A, a conductive ring A and a conductive component E, wherein the connecting block A is arranged in a clamping groove of an outer flange A of a second central rod, one end surface of the connecting block A is provided with a threaded hole A, one surface adjacent to the surface where the threaded hole A is arranged is provided with a blind hole, the blind hole surface of the connecting block A faces to a radial channel B of the second central rod, the blind hole is aligned with the radial channel B, and the threaded hole surface faces to a connecting end part; the connecting ring A is sleeved on the periphery of the second central rod, the compression connecting block A is fixed on the outer flange A of the second central rod through screws, a groove is formed in the connecting ring A, and a through hole is formed in the bottom of the groove; the conducting ring A is embedded in a groove of the connecting ring A, the conducting component E is rod-shaped, one end of the conducting component E is provided with threads, the threaded end of the conducting component E sequentially penetrates through the conducting ring A and the connecting ring A to be fixed on the connecting block A, the conducting component E is connected with a wire in the radial channel B in a contact mode after connection, and the end face of the conducting ring A is higher than the end face of the connecting ring A.
Preferably, the connecting block A and the connecting ring A are made of insulating materials.
Further, the shaft sleeve piece is hollow and cylindrical and sleeved on the periphery of the first center rod, and two notches are symmetrically formed in the end part of the shaft sleeve piece;
the third conductive mechanism comprises a conductive rod, a connecting block B, a connecting ring B, a conductive ring B and a conductive assembly F, wherein the connecting block B comprises a conductive block A and a connecting box A, and the conductive block A is arranged in the connecting box A; the connecting block B is arranged in the notch of the shaft sleeve member, a threaded hole B is formed in the end face of the conductive block A and one face adjacent to the end face, and a circular hole is formed in the face, corresponding to the threaded hole of the conductive block A, of the connecting box A; when the shaft sleeve is installed, the two open hole surfaces face the end face of the shaft sleeve and the outer part of the shaft sleeve respectively;
the connecting ring B is tightly pressed on the end face of the shaft sleeve through a screw, a groove B is formed in the connecting ring B, the conducting ring B is embedded in the groove B of the connecting ring B, the conducting component F and the conducting rod are rod-shaped, one end of the conducting component F is provided with threads, the threaded end of the conducting component F sequentially penetrates through the conducting ring B and the connecting ring B to be fixed on the conducting block A, and the end face of the conducting ring B after connection is higher than the end face of the connecting ring B; the conductive rod is radially arranged and connected with the conductive block A through threads.
Preferably, the connection box A and the connection ring B are made of insulating materials.
The system for testing the conductivity of the conductive structure at the end part of the central rod comprises a cabin body, wherein the cabin body is cylindrical, and two ends of the cabin body are respectively connected with an upper end cover and a lower end cover; the upper end cover comprises a cover body A and a shaft body A, the outer wall of the shaft body A is matched with the inner wall of the cabin body, and a through hole A is formed in the shaft body A; the outer side of the lower end cover is connected with a high-pressure liquid source; the central rod end conductive structure is arranged in the cabin body and close to one side of the upper end cover, a pull rod is fixedly connected with a first central rod of the central rod end conductive structure, and the pull rod is in sliding fit with a shaft body through hole of the upper end cover; and one end of a shaft sleeve piece of the central rod end conductive structure is connected with the shaft body A of the upper end cover, one end of the shaft sleeve piece is connected with the heating cylinder, and a conductive rod of a third conductive mechanism connected to the shaft sleeve piece is in contact connection with the heating cylinder.
Further, the tail end of the shaft body A of the upper end cover is provided with a stepped section, and the stepped section is provided with external threads; the shaft sleeve piece of the conductive structure at the end part of the central rod is provided with an internal thread at one end far away from the third conductive mechanism, the internal thread is connected with the periphery of the stepped section of the shaft body A of the upper end cover through threads, and an external thread is arranged at the other end of the shaft sleeve piece and fixedly connected with the heating cylinder through threads.
Further, the distal end of the second central rod of the central rod end conductive structure is provided with a temperature sensor that monitors the overall temperature conditions within the cabin.
Further, a sealing ring is arranged on one side, close to the internal thread of the shaft sleeve, of the periphery of the central rod.
Compared with the prior art, the invention has the beneficial effects that:
1) According to the end conductive structure of the central rod, through the sleeve piece sleeved on the periphery of the central rod, sliding contact type current conduction between the third conductive mechanism and the fourth conductive mechanism is realized, and the current conducted by the central conductive module is transmitted to the end conductive module;
2) According to the conductive structure at the end part of the central rod, the conductive path is protected by the connecting block and the connecting ring which are made of insulating materials, so that the conductive path is isolated from the first central rod and the second central rod and is safe and conductive;
3) According to the conductive performance testing system, the heating cylinder in the cabin body is in contact connection with the conductive structure at the end part of the central end to realize electric conduction, so that the cabin body is heated, meanwhile, the lower end cover of the cabin body is externally connected with a high-pressure liquid source, high-pressure liquid can be injected into the cabin body, liquid environments with different temperatures and different pressures are provided for the conductive structure at the end part of the central rod, and the stability of the conductive structure at the end part of the central rod, comprising the central conductive module and the conductive module at the end part, in different environments can be tested.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Reference numerals:
FIG. 1 is a schematic view of the overall structure of the conductive structure of the end of the center rod of the present invention;
FIG. 2 is a schematic view of the connection structure of the second center rod and the fourth conductive mechanism according to the present invention;
FIG. 3 is a cross-sectional view of a second center rod of the present invention;
FIG. 4 is a schematic view of a connection structure between a shaft assembly and a third conductive mechanism according to the present invention;
FIG. 5 is a schematic diagram of the overall structure of the conductivity testing system according to the present invention;
FIG. 6 is an enlarged schematic view of the area of the dashed box in FIG. 5;
100-center rod end conductive structure, 10-first center rod, 20-second center rod, 21-center channel A, 22-radial channel B, 23-flange A, 24-clamping groove, 11-first conductive mechanism, 12-second conductive mechanism, 30-shaft sleeve, 40-fourth conductive mechanism, 401-connecting block A, 411-threaded hole A, 412-blind hole, 402-connecting ring A, 421-groove A, 403-conductive ring A, 404-conductive component E, 405-screw, 50-third conductive mechanism, 501-conductive rod, 502-connecting block B, 506-connecting box A, 507-conductive block A, 503-connecting ring B, 504-conductive ring B, 505-conductive component F, 15-pull rod, 70-capsule, 71-upper end cap, 711-cover A, 712-shaft body A, 713-ladder section, 72-lower end cap, 80-seal ring, 101-temperature sensor, 200-heating cylinder, 201-core cylinder, 202-core.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Embodiment one:
the embodiment provides a sliding contact type central rod end conductive structure 100, which comprises a first central rod 10 and a second central rod 20, wherein the first central rod 10 is detachably connected with the second central rod 20; comprising a central conductive module comprising a first conductive means 11 mounted in said first central rod 10, a second conductive means 12 mounted in a second central rod 20; the end conductive module comprises a shaft sleeve 30, a third conductive mechanism 50 connected to the end of the shaft sleeve 30 and a fourth conductive mechanism 40 connected to the outer peripheral end of the second central rod 20, the shaft sleeve 30 is sleeved on the outer periphery of the first central rod 10 in a sliding manner, the third conductive mechanism 50 comprises a conductive rod 501 radially arranged on the outer periphery of the shaft sleeve 30, the conductive rod 501 is used for being connected with an external conductive component, and the fourth conductive mechanism 40 is connected with the second conductive mechanism 12 through a wire; when the first central rod 10 is connected with the second central rod 20, the first conductive mechanism 11 and the second conductive mechanism 12 are in press fit to form a contact connection structure, and the other ends of the first conductive mechanism 11 and the second conductive mechanism 12 are respectively connected with a cable to realize the electric conduction in the central rod; the first central rod 10 and the second central rod 20 are connected to form a central rod assembly, which can move axially relative to the shaft sleeve 30, the shaft sleeve is fixed, and after the central rod assembly is pulled to a certain position, the third conductive component 50 and the fourth conductive component 40 are connected in contact, so that the electric power inside the central rod is conducted to the conductive rod 501 outside the central rod.
The first conductive mechanism 11 and the second conductive mechanism 12 for conducting the electric power inside the central rod belong to the prior art, and are not described in detail here.
An axial channel A21 is arranged in the second central rod 20, a radial channel B22 penetrating through the second central rod is also arranged on the side wall, a flange A23 is arranged on the periphery of the second central rod 20, and a clamping groove 24 is arranged on the flange A23 corresponding to the outlet of the radial channel B22; a wire connected to the second conductive means 12 is provided in the radial passage B22.
The fourth conductive mechanism comprises a connection block a401, a connection ring a402, a conductive ring a403 and a conductive component E404, wherein the connection block a401 and the connection ring a402 are made of insulating materials, for example, the connection block a401 is an epoxy resin block, the connection ring a402 is an epoxy resin ring, and preferably, the conductive ring a403 is a conductive copper ring;
the connecting block A401 is arranged in the clamping groove 24 of the outer flange A of the second central rod 20, a threaded hole A411 is formed in one end face of the connecting block A401, a blind hole 412 is formed in one face adjacent to the face where the threaded hole A411 is located, the blind hole 412 of the connecting block A401 faces to the radial channel B22 of the second central rod, the blind hole 412 is aligned with the radial channel B22, and the threaded hole 411 faces to the connecting end part; the connecting ring A402 is sleeved on the periphery of the second central rod 20, the compression connecting block A401 is fixed on the outer flange A of the second central rod through a screw 405, a groove 421 is formed in the connecting ring A402, and a through hole is formed in the bottom of the groove; the conducting ring A403 is embedded in the groove 421 of the connecting ring A, the conducting component E404 is rod-shaped, one end of the conducting component E404 is threaded, the threaded end of the conducting component E404 sequentially passes through the conducting ring A403 and the connecting ring A402 to be fixed on the connecting block A401, the conducting component E404 is contacted and connected with a wire in the radial channel B22 after connection, and the end face of the conducting ring A403 is higher than the end face of the connecting ring A402.
The shaft sleeve 30 is hollow and cylindrical and sleeved on the periphery of the first central rod 10, and two notches are symmetrically arranged at the end part of the shaft sleeve 30;
the third conductive mechanism 50 includes a conductive rod 501, a connection block B502, a connection ring B503, a conductive ring B504, and a conductive component F505, where the connection block B502 includes a conductive block a507 and a connection box a506, the conductive block a507 is disposed in the connection box a506, the connection box a506 and the connection ring B503 are made of insulating materials, for example, the connection box a506 is an epoxy block, the connection ring B503 is an epoxy ring, preferably, the conductive block a507 is a conductive copper block, and the conductive ring B504 is a conductive copper ring;
the connecting block B502 is arranged in the notch of the shaft sleeve piece 30, a threaded hole B is formed in the end face of the conductive block A507 and one face adjacent to the end face, and a circular hole is formed in the face of the connecting box A507 corresponding to the threaded hole of the conductive block A507; when the shaft sleeve is installed, the two open hole surfaces face the end face of the shaft sleeve and the outer part of the shaft sleeve respectively;
the connecting ring B503 is tightly pressed on the connecting block B502 and is fixed on the end face of the shaft sleeve 30 through screw locking, a groove B is formed in the connecting ring B503, the conducting ring B504 is embedded in the groove B of the connecting ring B503, the conducting component F505 and the conducting rod 501 are rod-shaped, one end of the conducting rod 501 is threaded, the threaded end of the conducting component F505 sequentially penetrates through the conducting ring B504 and the connecting ring B503 to be fixed on the conducting block A507, and the end face of the conducting ring B504 is higher than the end face of the connecting ring B503 after connection; the conductive rod 501 is radially arranged and connected to the conductive block a507 through threads.
In this embodiment, the first central rod 10 and the second central rod 20 are connected by threads, the first conductive mechanism 11 and the second conductive mechanism 12 are respectively installed in the first central rod 10 and the second central rod 20, the fourth conductive mechanism 40 is installed on the peripheral end surface of the second central rod 20, the fourth conductive mechanism 40 is connected with the second conductive mechanism 12 by a wire, the third conductive mechanism 50 is installed on the end surface of the shaft sleeve 30, the shaft sleeve 30 is sleeved on the periphery of the first central rod 10, the first central rod 10 and the end of the second central rod 20 are correspondingly connected by threads, when the first central rod and the second central rod are connected, a central rod assembly is formed, the first conductive mechanism 11 and the second conductive mechanism 12 are in pressing contact, so as to realize the electric conduction inside the central rod, then the shaft sleeve 30 is fixed, after the central rod assembly is pulled, the conductive ring B504 of the third conductive mechanism 50 and the conductive ring A403 of the fourth conductive mechanism 40 form contact connection, the electric current of the central conductive module is transmitted to the conductive assembly E through the wire in the radial channel B, and then transmitted to the conductive assembly E403, the conductive ring B, the conductive assembly 505 and the conductive assembly F are transmitted to the outside the central rod assembly 501 and the radial conductive assembly F and the conductive assembly is connected to realize the radial transmission.
In this embodiment, the third conductive mechanism and the fourth conductive mechanism are both provided with a connection ring and a connection block made of insulating materials, so that the conductive path can be isolated from the first central rod and the second central rod, and the conductive path is safe and reliable.
Example two
The second embodiment provides a system for testing the conductivity of the central conductive module in different temperature and pressure environments by using the central rod end conductive structure 100,
the device comprises a cabin 70, wherein the cabin is cylindrical, and two ends of the cabin are respectively connected with an upper end cover 71 and a lower end cover 72; the upper end cover 71 is T-shaped and comprises a cover body A711 and a shaft body A712, the outer wall of the shaft body A712 is matched with the inner wall of the cabin body 70, a through hole A is formed in the shaft body A, a step section 713 is arranged at the tail end of the shaft body A, and external threads are arranged on the step section 713; the lower end cover 73 comprises a cover body B and a shaft body B, a through hole B is formed in the shaft body B, and the outer side of the lower end cover is connected with a high-pressure liquid source;
the central rod end conductive structure 100 is arranged in the cabin 70 at one side close to the upper end cover 71, the first central rod 10 of the central rod end conductive structure is externally connected with a pull rod 15, the pull rod 15 is in sliding fit with a shaft body 712 through hole of the upper end cover,
an inner thread is arranged at one end, far away from the third conductive mechanism 50, of the shaft sleeve piece 30 of the conductive structure at the end part of the central rod, the outer thread is arranged at the other end of the shaft sleeve piece 30, which is connected with the outer periphery of the stepped section 713 of the shaft body A of the upper end cover through threads, the heating cylinder 200 is fixedly connected with the central rod through threads, and the conductive rod 501 of the third conductive mechanism connected with the shaft sleeve piece 30 is in contact connection with the heating cylinder 200; the inner cavity of the heating cylinder 200 is provided with a core barrel 201, a core 202 is arranged in the core barrel 201, and the heating cylinder 200 can heat the core; the far end of a second central rod of the central rod end conductive structure is provided with a temperature sensor 101, and the temperature sensor 101 monitors the overall temperature condition in the cabin; the outer side of the lower end cover 72 is connected with a high-pressure liquid source, high-pressure liquid is injected into the cabin body through the through hole B, and the cabin body is heated by matching with the heating cylinder; the sealing ring 80 is arranged on one side, close to the internal thread of the shaft sleeve piece 30, of the periphery of the central rod 1, and after the sealing ring 80 is pulled in place along with the central rod assembly, the sealing ring is matched with the inner wall of the shaft body 712 of the upper end cover in a mutually-extruded mode to form a seal in the cabin body, so that high-pressure liquid is prevented from overflowing along the outer wall of the central rod assembly.
In the conductivity test system of the present embodiment, the first center rod 10 and the second center rod 20 are well connected, that is, the center conductive module processes the connection state, and the connection between the third conductive mechanism 50 and the fourth conductive mechanism 40 is achieved by pulling the pull rod 15, that is, the current conducted by the center conductive module is transferred to the third conductive mechanism 40, and the conductive rod 501 of the third conductive mechanism 50 is in contact connection with the heating cylinder 200, so as to achieve current control of the heating cylinder; drawing the pull rod to a certain position to realize current conduction, starting the heating cylinder to heat the rock core, simultaneously injecting high-pressure liquid into the cabin from the through hole B of the lower end cover, matching with the heating cylinder for heating, and when the temperature sensor 101 monitors that the liquid temperature reaches a required test value, disconnecting the pull rod 15 by reverse pushing to realize current disconnection and stopping heating; the repeated test can test the electrifying stability of the central conductive module and the outer conductive module under the liquid environments with different temperatures and different pressures.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A central rod end conductive structure (100), characterized by: comprising the following steps:
a first central rod (10) and a second central rod (20), wherein the first central rod (10) is detachably connected with the second central rod (20);
a central conductive module: comprising a first conductive means (11) mounted in said first central rod (10), a second conductive means (12) mounted in a second central rod (20);
end conductive module: the device comprises a shaft sleeve (30), a third conductive mechanism (50) connected to the end part of the shaft sleeve (30) and a fourth conductive mechanism (40) connected to the peripheral end part of the second central rod (20), wherein the shaft sleeve (30) is sleeved on the periphery of the first central rod (10) in a sliding manner, the third conductive mechanism (50) comprises a conductive rod (501) radially arranged on the periphery of the shaft sleeve (30), and the conductive rod (501) is used for being connected with an external conductive part; the fourth conductive mechanism (40) is connected with the second conductive mechanism (12) through a wire;
when the first central rod (10) is connected with the second central rod (20), the first conductive mechanism (11) and the second conductive mechanism (12) are in press fit to form a contact connection structure, and the other ends of the first conductive mechanism (11) and the second conductive mechanism (12) are respectively connected with a cable to realize the electric conduction in the central rod; the first central rod (10) and the second central rod (20) are connected to form a central rod assembly, the central rod assembly and the shaft sleeve (30) can move axially relatively, the shaft sleeve is fixed, and after the central rod assembly is pulled to a certain position, the third conductive mechanism (50) and the fourth conductive mechanism (40) are in contact connection, so that electric power inside the central rod is conducted to the conductive rod (501) outside the central rod.
2. The center rod end conductive structure of claim 1, wherein: an axial channel A (21) is arranged in the second center rod (20), a penetrating radial channel B (22) is formed in the side wall, a flange A (23) is arranged on the periphery of the second center rod (20), and a clamping groove (24) is formed in the flange A (23) corresponding to the outlet of the radial channel B (22); a wire connected with the second conductive mechanism (12) is arranged in the radial channel B (22).
3. The center rod end conductive structure of claim 2, wherein: the fourth conductive mechanism comprises a connecting block A (401), a connecting ring A (402), a conductive ring A (403) and a conductive component E (404), wherein the connecting block A (401) is arranged in a clamping groove (24) of an external flange A of a second central rod (20), a threaded hole A (411) is formed in one end face of the connecting block A (401), a blind hole (412) is formed in one face adjacent to the face where the threaded hole A (411) is formed, the blind hole (412) of the connecting block A (401) faces towards a radial channel B (22) of the second central rod, the blind hole (412) is aligned with the radial channel B (22), and the threaded hole A (411) faces towards the connecting end part; the connecting ring A (402) is sleeved on the periphery of the second central rod (20), the compression connecting block A (401) is fixed on the outer flange A of the second central rod through a screw (405), a groove (421) is formed in the connecting ring A (402), and a through hole is formed in the bottom of the groove; the conducting ring A (403) is embedded in the groove (421) of the connecting ring A, the conducting component E (404) is in a rod shape, one end of the conducting component E (404) is threaded, the threaded end of the conducting component E (404) sequentially penetrates through the conducting ring A (403) and the connecting ring A (402) to be fixed on the connecting block A (401), the conducting component E (404) is in contact connection with a wire in the radial channel B (22) after connection, and the end face of the conducting ring A (403) is higher than the end face of the connecting ring A (402).
4. A center rod end conductive structure according to claim 3, wherein: the connecting block A (401) and the connecting ring A (402) are made of insulating materials.
5. The center rod end conductive structure of claim 1, wherein: the shaft sleeve piece (30) is hollow and cylindrical and sleeved on the periphery of the first central rod (10), and two notches are symmetrically arranged at the end part of the shaft sleeve piece (30);
the third conductive mechanism (50) comprises a conductive rod (501), a connecting block B (502), a connecting ring B (503), a conductive ring B (504) and a conductive component F (505), wherein the connecting block B (502) comprises a conductive block A (507) and a connecting box A (506), and the conductive block A (507) is arranged in the connecting box A (506); the connecting block B (502) is arranged in a notch of the shaft sleeve piece (30), a threaded hole B is formed in the end face of the conductive block A (507) and one face adjacent to the end face, and a circular hole is formed in the face of the connecting box A (506) corresponding to the threaded hole of the conductive block A (507); when the shaft sleeve is installed, the two open hole surfaces face the end face of the shaft sleeve and the outer part of the shaft sleeve respectively;
the connecting ring B (503) is tightly pressed on the connecting block B (502) and is fixed on the end face of the shaft sleeve (30) through a screw, the connecting ring B (503) is provided with a groove B, the conducting ring B (504) is embedded in the groove B of the connecting ring B (503), the conducting component F (505) and the conducting rod (501) are rod-shaped, one end of the conducting rod is provided with threads, the threaded end of the conducting component F (505) sequentially passes through the conducting ring B (504) and the connecting ring B (503) and is fixed on the conducting block A (507), and the end face of the conducting ring B (504) after connection is higher than the end face of the connecting ring B (503); the conductive rod (501) is radially arranged and connected to the conductive block A (507) through threads.
6. The center rod end conductive structure of claim 5, wherein: the connecting box A (506) and the connecting ring B (503) are made of insulating materials.
7. A conductivity testing system comprising the center rod end conductivity structure (100) of any one of claims 1-6, characterized by:
the device comprises a cabin body (70), wherein the cabin body is cylindrical, and two ends of the cabin body are respectively connected with an upper end cover (71) and a lower end cover (72); the upper end cover (71) comprises a cover body A (711) and a shaft body A (712), the outer wall of the shaft body A (712) is matched with the inner wall of the cabin body (70), and a through hole A is formed in the shaft body A; the outer side of the lower end cover (72) is connected with a high-pressure liquid source;
the central rod end conductive structure (100) is arranged in the cabin body (70) and is close to one side of the upper end cover (71), a pull rod (15) is fixedly connected with a first central rod (10) of the central rod end conductive structure, and the pull rod (15) is in sliding fit with a shaft body A (712) of the upper end cover;
one end of a shaft sleeve piece (30) of the central rod end conductive structure is connected with a shaft body A of the upper end cover, one end of the shaft sleeve piece is connected with the heating cylinder (200), and a conductive rod (501) of a third conductive mechanism connected to the shaft sleeve piece (30) is in contact connection with the heating cylinder (200).
8. The conductivity testing system according to claim 7, wherein: the tail end of the shaft body A of the upper end cover is provided with a step section (713), and the step section (713) is provided with external threads; one end, far away from the third conductive mechanism (50), of the shaft sleeve piece (30) of the conductive structure at the end part of the central rod is provided with internal threads, the inner threads are connected with the periphery of the stepped section (713) of the shaft body A of the upper end cover through threads, the other end of the inner threads are provided with external threads, and the inner threads are fixedly connected with the heating cylinder (200) through threads.
9. The conductivity testing system according to claim 7, wherein: the distal end of the second central rod of the central rod end conductive structure is provided with a temperature sensor (101), and the temperature sensor (101) monitors the overall temperature condition in the cabin.
10. The conductivity testing system according to claim 7, wherein: a sealing ring (80) is arranged on one side, close to the internal thread of the shaft sleeve piece (30), of the periphery of the central rod (1).
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