Integrated sacrificial anode connection structure

Abstract

The invention relates to the technical field of sacrificial anodes, in particular to an integrated sacrificial anode connecting structure which comprises a connecting assembly used for being connected with an anode body. The anode body comprises an outer metal piece and an inner rod core coaxially arranged in the outer metal piece; the connecting assembly comprises a connector, a plurality of sets of non-return assemblies are arranged in the connector around the axis, and each non-return assembly comprises a cavity formed in the connector and communicated with the inner space of the connector; the barbs are rotationally arranged in the cavity, and the sharp ends of the barbs face the surface of the inner rod core. Through cooperation of the barbs of the non-return assembly and the elastic pieces, the one-way screwing function is achieved, loosening, caused by vibration or external force, of the connecting assembly and the anode body is effectively prevented, and the stability of the connecting structure is remarkably improved; and moreover, the barbs can be reset through the torsional spring after the anode body is consumed, so that the detachable function of the connector and the inner rod core is realized, and the replacement or maintenance is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sacrificial anodes, in particular to an integrated sacrificial anode connecting structure. BACKGROUND

[0002] In the field of metal corrosion protection, sacrificial anode cathodic protection technology is widely used in many fields such as ships, offshore platforms, oil and chemical pipelines, storage tanks, etc. due to its high efficiency, economy and easy installation. The technology connects the sacrificial anode with a more negative potential to the protected metal structure, so that the sacrificial anode preferentially undergoes oxidation in the electrolyte environment, thereby protecting the protected metal from corrosion. The integrated sacrificial anode connecting structure is a key component for realizing the electrical connection and mechanical fixation of the sacrificial anode and the protected metal, and its reliability directly affects the effectiveness and service life of the entire cathodic protection system.

[0003] In actual working conditions, many application scenarios exist in varying degrees of vibration environment. For example, during navigation, ships are affected by sea wave impact, main engine vibration, and propeller pulsation; offshore platforms are subjected to dynamic loads of sea wind, sea waves and ocean currents, resulting in continuous vibration; oil and chemical pipelines also vibrate under external excitations such as medium flow, mechanical vibration or earthquakes. The vibration environment will generate periodic alternating stress on the integrated sacrificial anode connecting structure, resulting in reduced friction between the connecting components, relaxed pre-tightening force, and further causing the loosening of the connecting structure. SUMMARY

[0004] The present application provides an integrated sacrificial anode connecting structure to solve the problems in the prior art, and the specific technical solutions are as follows:

[0005] The integrated sacrificial anode connecting structure includes a connecting assembly for connecting an anode body.

[0006] The anode body includes an outer metal piece and an inner rod core coaxially arranged in the outer metal piece.

[0007] The connecting assembly includes a connecting head, and a plurality of sets of reverse stopping assemblies are arranged around the axis in the connecting head.

[0008] A cavity is opened in the connecting head and communicates with the internal space thereof.

[0009] A barb is rotationally arranged in the cavity, and the sharp end of the barb faces the surface of the inner rod core.

[0010] An elastic member is arranged in the cavity and presses against the barb, so that the sharp end of the barb penetrates into the surface of the inner rod core, preventing the reverse rotation of the connecting assembly and the anode body.

[0011] As a further technical scheme of the present application, the driving assembly comprises a push rod and a second spring, the push rod is slidingly arranged in the slide of the connector, one end of the push rod extends to the outside of the connector, the other end of the push rod is in contact with the elastic member and has an inclined pressing surface; the second spring is connected with the push rod through a pressing plate;

[0012] When the connecting assembly is screwed with the anode body, the push rod is pressed back by the end surface of the outer metal piece, so as to drive the elastic member to increase the penetration pressure of the barb; when the outer metal piece is consumed, the second spring drives the push rod to reset and release the pressure of the barb.

[0013] As a further technical scheme of the present application, the elastic member comprises a sleeve, a pressing rod and a first spring, one end of the pressing rod is inserted into the sleeve, the other end of the pressing rod abuts against the sharp end of the barb, the first spring is connected between the pressing rod and the sleeve, and the first spring applies elastic pressure to the pressing rod.

[0014] As a further technical scheme of the present application, the contact surface between the tail of the push rod and the sleeve is an inclined surface, and the top of the sleeve is provided with an inclined surface matched with the inclined surface of the push rod, so as to drive the sleeve to move towards the pressing rod through the back movement of the push rod, thereby increasing the deformation amount of the first spring.

[0015] As a further technical scheme of the present application, a butt joint hole for inserting the conductor is coaxially arranged at the extended end of the inner rod core;

[0016] The connecting assembly further comprises a conductive plug-in part, the conductive plug-in part comprises a protective sleeve, a conductor, a base disc and a reed, the protective sleeve is coaxially connected to the tail of the connector and is connected to the connector by heat melting, the conductor is coaxially arranged in the protective sleeve and one end of the conductor is inserted into the connector, the base disc is connected to the inserted end of the conductor, one end of the reed is connected to the base disc, the other end of the reed extends obliquely to the axis, the reed is arranged in a plurality of groups around the axis and forms a deformable conical cage structure, and the conical cage structure is inserted into the butt joint hole to realize electrical connection.

[0017] As a further technical scheme of the present application, one end of the inner rod core extends to the outside of the outer metal piece and forms a stepped structure, and an external thread is arranged on the outer periphery of the extended end;

[0018] The connector has an internal thread corresponding to the external thread in the connector;

[0019] In the installed state, the external thread and the internal thread are screwed and the butt joint end of the connector abuts against the end surface of the outer metal piece.

[0020] As a further technical scheme of the present application, the connecting head is provided with an outer sealing lip and an inner sealing lip, which are deformed under pressure to form a sealed cavity covering the connection between the outer thread and the connecting head.

[0021] As a further technical scheme of the present application, the barb is arranged in the chamber by a torsion spring, which drives the barb to rotate in a direction away from the inner rod core in normal state, and the barb automatically separates from the surface of the inner rod core after the outer metal piece is consumed.

[0022] The present application has the following advantages:

[0023] (1) In the present application, the barb of the reverse stopping assembly cooperates with the elastic member to realize the one-way tightening function, effectively preventing the loosening of the connecting assembly and the anode body due to vibration or external force, and significantly improving the stability of the connecting structure.

[0024] Moreover, the barb can be reset by the torsion spring after the anode body is consumed, realizing the detachable function of the connecting head and the inner rod core, and facilitating replacement or maintenance.

[0025] (2) In the present application, the push rod of the driving assembly extrudes the elastic member, so that the deeper the screwing is, the greater the penetration pressure of the barb is, further enhancing the anti-loosening ability. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The overall structure of the integrated sacrificial anode connecting structure is shown;

[0027] Figure 2 The structure of the anode body is shown;

[0028] Figure 3 The structure of the connecting assembly is shown;

[0029] Figure 4 The structure of the conductive plug-in part is shown;

[0030] Figure 5 The distribution structure of the reverse stopping assembly in the connecting head is shown;

[0031] Figure 6 The structure of the reverse stopping assembly is shown;

[0032] Figure 7 The structure of the elastic member is shown;

[0033] Figure 8 The structure of the driving assembly is shown.

[0034] BRIEF DESCRIPTION OF DRAWINGS: 100, anode body; 110, outer metal piece; 120, inner rod core; 121, outer thread; 122, butt joint hole; 200, connecting assembly; 210, connecting head; 211, inner thread; 212, outer sealing lip; 213, inner sealing lip; 220, conductive plug-in part; 221, protective sleeve; 222, conductor; 223, base disc; 224, spring piece; 300, reverse prevention assembly; 310, cavity; 320, barb; 330, elastic piece; 331, sleeve; 332, pressing rod; 333, first spring; 400, driving assembly; 410, slide; 420, push rod; 430, sliding groove; 440, pressing plate; 450, second spring. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below with reference to the embodiments.

[0036] Figure 1 The overall structure schematic diagram of the integrated sacrificial anode connecting structure is shown; Figure 1 In the embodiment, the integrated sacrificial anode connecting structure comprises a connecting assembly 200 for connecting an anode body 100, and the connecting assembly 200 is screwed with the anode body 100 through a threaded structure.

[0037] Figure 2 The structural schematic diagram of the anode body 100 is shown; Figure 2 In the embodiment, the anode body 100 comprises an outer metal piece 110 and an inner rod core 120, wherein the inner rod core 120 is coaxially arranged in the outer metal piece 110 and extends to the outside to form a step at one end, an outer thread 121 is arranged on the outer periphery of the extending end of the inner rod core 120, and a butt joint hole 122 for plug-in of a conductor is coaxially arranged in the extending end of the inner rod core 120; in actual use, the connecting assembly 200 is screwed with the anode body 100 through the outer thread 121, and the butt joint hole 122 can cooperate with an electric circuit.

[0038] Figure 3 The structural schematic diagram of the connecting assembly 200 is shown; Figure 3In the connection assembly 200, the connecting head 210 has an open end for abutting the extension end of the inner rod core 120, and has an inner thread 211 corresponding to the outer thread 121 in the connecting head 210. The abutting end of the connecting head 210 is coaxially provided with an outer sealing lip 212 and an inner sealing lip 213, and has a space between the outer sealing lip 212 and the inner sealing lip 213. In the installed state, the outer thread 121 and the inner thread 211 are screwed, and the abutting end of the connecting head 210 is pressed against the end face of the outer metal piece 110. The outer sealing lip 212 and the inner sealing lip 213 are deformed and form a sealed cavity. The sealed cavity can ensure the sealing effect of the sealed surface of the anode body 100 and the connection assembly 200, and ensure that the inner rod core 120 is not short-circuited by interference.

[0039] Figure 4 A structural diagram of the conductive plug-in part 220 is shown. Figure 4 In the conductive plug-in part 220, the protective sleeve 221 is coaxially connected to the tail of the connecting head 210 and is hot-melt connected thereto. The conductor 222 is coaxially arranged in the protective sleeve 221 and has one end inserted into the connecting head 210. The base disc 223 is connected to the inserted end of the conductor 222. One end of the spring sheet 224 is connected to the base disc 223, and the other end extends obliquely to the axis. The spring sheet 224 is arranged in several groups around the axis and forms a deformable conical cage structure. In the installed state, the conical cage structure is inserted into the abutting hole 122 and deformed. The conical cage structure formed by the spring sheet 224 is used to connect with the abutting hole 122, and the spring sheet 224 is in contact with the inner wall of the abutting hole 122 after deformation, so as to overcome the stability of the connection under high-frequency vibration and reduce the frequency of poor contact.

[0040] Figure 5 A distribution structure diagram of the reverse stopping assembly 300 in the connecting head 210 is shown. Figure 5 In the connecting head 210, a plurality of reverse stopping assemblies 300 are arranged around the axis.

[0041] Figure 6 A structural diagram of the reverse stopping assembly 300 is shown. Figure 6In the embodiment, the reverse-stopping assembly 300 comprises a chamber 310, a barb 320 and an elastic member 330. The chamber 310 is formed in the connector 210 and communicates with the inner space of the connector 210. The barb 320 is rotatably arranged in the chamber 310. In the installed state, the elastic member 330 is slidably arranged in the chamber 310 and presses the sharp end of the barb 320 against the surface of the inner rod core 120. The barb 320 is configured to be inserted into the inner rod core 120 when the connecting assembly 200 is rotated and separated from the anode body 100. That is, the barb 320 only allows the connecting assembly 200 to rotate in one direction, i.e., allows the connecting assembly 200 and the anode body 100 to be screwed together. When the connecting assembly 200 and the anode body 100 are rotated and separated, the barb 320 is pressed by the elastic member 330 and can be inserted into the inner rod core 120 to prevent separation. This fundamentally eliminates the possibility of separation of the anode body 100 and the connecting assembly 200, thereby overcoming the problem of thread loosening caused by conventional vibration environment.

[0042] Figure 7 A structural diagram of the elastic member 330 is shown; Figure 7 In the embodiment, the elastic member 330 comprises a sleeve 331, a pressing rod 332 and a first spring 333. One end of the pressing rod 332 is inserted into the sleeve 331, and the other end presses the sharp end of the barb 320. The first spring 333 is connected between the pressing rod 332 and the sleeve 331 and applies an elastic pressure to the pressing rod 332. That is, the elastic force of the first spring 333 can push the pressing rod 332 to press the sharp end of the barb 320, thereby ensuring the effect of the barb 320 on the reverse rotation of the connecting assembly 200. At the same time, the sleeve 331 can move relative to the pressing rod 332, and the distance between the two changes synchronously to affect the degree of insertion of the sharp end of the barb 320 into the inner rod core 120.

[0043] Figure 8 A structural diagram of the driving assembly 400 is shown; Figure 8Each reverse stopping component 300 is provided with a corresponding driving component 400, the driving component 400 comprising a sliding channel 410, a push rod 420, a sliding groove 430, a pressing plate 440 and a second spring 450, the sliding channel 410 being formed in the connecting head 210 and communicating with the cavity 310, the push rod 420 being slidingly arranged in the sliding channel 410 and extending out of the opening end of the connecting head 210 at one end, the tail of the push rod 420 being in contact with the elastic member 330 and having an inclined pressing surface, the push rod 420 driving the sleeve 331 to move towards the pressing rod 332 to gradually increase the pressure of the pointed end of the barb 320 when the connecting assembly 200 and the anode body 100 are screwed, that is, the end of the push rod 420 is provided with an inclined surface, the top of the sleeve 331 is also provided with an inclined surface, and the two inclined surfaces match with each other, when the connecting assembly 200 and the anode body 100 are screwed, the free end of the push rod 420 is pressed by the end surface of the outer metal piece 110 and retreats into the sliding channel 410, thereby driving the sleeve 331 to move towards the pressing rod 332, expanding the deformation degree of the first spring 333, increasing the pressure of the pointed end of the barb 320 on the inner rod core 120, thereby realizing that the resistance of the counter-rotation of the connecting assembly 200 gradually increases with the gradually deepening of the connection degree of the connecting assembly 200 and the anode body 100; the push rod 420 is communicated outside the sliding channel 410, the pressing plate 440 is slidingly connected in the sliding groove 430 and connected with the push rod 420, and the second spring 450 is arranged in the sliding groove 430; as the push rod 420 is pushed into the sliding channel 410, the pressing plate 440 moves synchronously and deforms the second spring 450, and when the outer metal piece 110 is consumed, the pressure on the push rod 420 is released, and the elastic force of the second spring 450 can drive the push rod 420 to pop out to release the pressure on the pointed end of the barb 320.

[0044] It should be noted that the barb 320 is arranged in the cavity 310 by a torsional spring, and the barb 320 is configured to rotate in a direction away from the inner rod core 120 under the driving of the torsional spring in a normal state; after the outer metal piece 110 is consumed, the pointed end of the barb 320 can automatically separate from the inner rod core 120, so as to facilitate the connection of the connecting head 210 and the inner rod core 120.

[0045]

[0046] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it.​

Claims

1. An integrated sacrificial anode connection structure, comprising a connection assembly (200) for connecting an anode body (100); Its characteristics are: The anode body (100) comprises an outer metal member (110) and an inner rod core (120) coaxially arranged in the outer metal member (110); The connection assembly (200) includes a connection head (210), wherein a plurality of groups of anti-return assemblies (300) are arranged around an axis in the connection head (210), and the anti-return assemblies (300) include: A chamber (310) is provided in the connector (210) and communicates with the internal space thereof; a barb (320) rotatably disposed in the chamber (310), with the pointed end of the barb (320) facing the surface of the inner rod core (120); and an elastic member (330) disposed in the chamber (310) and pressing against the barb (320) so that the sharp end of the barb (320) pierces the surface of the inner rod core (120) to prevent the connection assembly (200) and the anode body (100) from rotating in the opposite direction.

2. The integrated sacrificial anode connection structure according to claim 1, characterized in that: The drive assembly (400) further comprises a push rod (420) and a second spring (450). The push rod (420) is slidably disposed in the slideway (410) of the connector (210). One end of the push rod (420) extends to the outside of the connector (210), and the other end contacts the elastic member (330) and has an inclined pressing surface. The second spring (450) is connected to the push rod (420) via a pressure plate (440). When the connecting assembly (200) is screwed to the anode body (100), the push rod (420) is squeezed back by the end face of the outer metal part (110), thereby driving the elastic part (330) to increase the penetration pressure of the barb (320); when the outer metal part (110) is consumed, the second spring (450) drives the push rod (420) to reset, releasing the pressure of the barb (320).

3. The integrated sacrificial anode connection structure according to claim 2, characterized in that: The elastic member (330) includes a sleeve (331), a pressure rod (332) and a first spring (333). One end of the pressure rod (332) is inserted into the sleeve (331), and the other end presses against the sharp end of the barb (320). The first spring (333) is connected between the pressure rod (332) and the sleeve (331). The first spring (333) applies elastic pressure to the pressure rod (332).

4. The integrated sacrificial anode connection structure according to claim 3, characterized in that: The contact surface between the tail of the push rod (420) and the sleeve (331) is an inclined surface, and the top of the sleeve (331) is provided with an inclined surface matching the inclined surface of the push rod (420), so that the sleeve (331) is driven to move toward the pressure rod (332) through the retracting movement of the push rod (420), thereby increasing the deformation of the first spring (333).

5. The integrated sacrificial anode connection structure according to claim 2, characterized in that: The extended end of the inner rod core (120) is coaxially provided with a docking hole (122) for inserting a conductor; The connection assembly (200) further includes a conductive plug-in portion (220), the conductive plug-in portion (220) including a protective sleeve (221), a conductor (222), a base plate (223) and a spring (224). The protective sleeve (221) is coaxially connected to the tail of the connector (210) and is thermally melted therewith. The conductor (222) is coaxially arranged in the protective sleeve (221) and one end is inserted into the connector (210). The base plate (223) is connected to the insertion end of the conductor (222). One end of the spring (224) is connected to the base plate (223), and the other end extends obliquely toward the axis. The spring (224) is arranged in a plurality of groups at intervals around the axis to form a deformable conical cage structure. The conical cage structure is inserted into the docking hole (122) to achieve electrical connection.

6. The integrated sacrificial anode connection structure according to claim 5, characterized in that: One end of the inner rod core (120) extends to the outside of the outer metal member (110) and forms a step structure, and an outer thread (121) is provided on the outer periphery of the extended end; The connector (210) has an internal thread (211) corresponding to the external thread (121); In the installed state, the external thread (121) and the internal thread (211) are screwed together and the butt end of the connector (210) is pressed against the end surface of the external metal member (110).

7. The integrated sacrificial anode connection structure according to claim 6, characterized in that: The butt end of the connector (210) is provided with an outer sealing lip (212) and an inner sealing lip (213), and the outer sealing lip (212) and the inner sealing lip (213) are deformed under pressure during installation to form a sealed compartment, and the sealed compartment covers the connection between the external thread (121) and the connector (210).

8. The integrated sacrificial anode connection structure according to claim 5, characterized in that: The barb (320) is rotatably arranged in the chamber (310) by a torsion spring, and the torsion spring drives the pointed end of the barb (320) to rotate in a direction away from the inner rod core (120) under normal conditions. The barb (320) automatically detaches from the surface of the inner rod core (120) after the outer metal part (110) is consumed.

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