CN213680897U

CN213680897U - Tensile type sacrificial anode system for protecting rotary filter screen

Info

Publication number: CN213680897U
Application number: CN202021868143.1U
Authority: CN
Inventors: 秦铁男; 宋世德; 刘磊; 张馨予; 朱东旭
Original assignee: Dalian Kingmile Anticorrosion Technology Co ltd
Current assignee: Dalian Komeier Marine Technology Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-07-13
Anticipated expiration: 2030-08-31

Abstract

The utility model discloses a tensile formula sacrificial anode system is used in rotary filter screen protection, including rotary filter screen, wire rope and at least one sacrificial anode subassembly, in the rotary filter screen cavity was located to rotary filter screen, wire rope is fixed in on the wall of rotary filter screen cavity, just wire rope with rotary filter screen's swivelling axis is connected, sacrificial anode subassembly includes sacrificial anode, connecting piece and fixed sleeve, the outside of connecting piece is equipped with sacrificial anode, the both ends of connecting piece respectively with a fixed sleeve fixed connection, fixed sleeve cover is located on the wire rope, and with wire rope fixed connection. The utility model discloses positive pole structural style, the installation is simple with the dismantlement, is applicable to rotary filter screen long-term cathodic protection and interim cathodic protection simultaneously, but the exclusive use also can jointly use with impressed current cathodic protection system, carries out the local protection of strengthening.

Description

Tensile type sacrificial anode system for protecting rotary filter screen

Technical Field

The utility model belongs to the technical field of cathodic protection is anticorrosive, particularly relate to a rotary screen protection is with tensile formula sacrificial anode system.

Background

The drum-shaped rotary filter screen is a core device of a circulating water filtering system of a nuclear power station, has the function of removing large-diameter suspended dirt in seawater, and is a main filtering device for taking water from a circulating water system and an important service water system of the nuclear power station. The drum filter screen is used in a seawater environment for a long time, and effective anticorrosion protection is required in the service period. The main structural material of the drum net is generally Q345 steel, and uniform corrosion is mainly performed in seawater; the net sheet and the dirt blocking bucket are made of 316L stainless steel materials and mainly subject to local corrosion. The drum-shaped filter screen structure has a natural corrosion potential of about 0.6V-0.8V (relative to a high-purity zinc/seawater reference electrode, the same applies below) in seawater as a whole, electrochemical corrosion can occur to the drum-shaped filter screen under an unprotected state, and particularly, for carbon steel at a damaged part of a coating, rapid local corrosion can occur due to galvanic corrosion of stainless steel and the carbon steel and the accelerated corrosion effect of a large cathode and a small anode.

At present, the corrosion prevention of the rotary filter screen is carried out by combining an anticorrosive coating with a cathodic protection means. Cathodic protection is to apply a certain cathodic current to the protected metal to make the electrode potential of the protected metal deviate from the balance electrode potential in the negative direction, when the cathodic polarization reaches the minimum protection potential, the whole protected metal has no potential difference in each part, and the corrosion loses the driving force, thereby inhibiting the corrosion of the structure. The cathodic protection technology is an effective means for corrosion prevention control, and is widely applied to corrosion prevention protection of important facilities and equipment such as seawater filtering equipment, seawater pipelines, condensers and the like of coastal nuclear/thermal power plants. The cathodic protection technology of the rotary filter screen can be divided into sacrificial anode cathodic protection and impressed current cathodic protection. The rotary filter screen sacrificial anode cathodic protection is realized by directly welding an aluminum alloy sacrificial anode on a rotary filter screen main body supporting structure, so that the protection of a drum screen is realized; the impressed current cathodic protection of the rotary filter screen is to adopt an external power supply and an auxiliary anode to provide protection current, so that the rotary filter screen obtains cathodic polarization, thereby inhibiting the occurrence of corrosion.

In the stage of installing and debugging the rotary filter screen, the impressed current cathodic protection system cannot normally operate because the site does not have a stable external power supply and operating conditions. In order to prevent corrosion of the rotary screen, sacrificial anodic cathodic protection is often used for temporary corrosion protection of the rotary screen. The sacrificial anode cathodic protection has the advantages of no need of external power supply, no need of operation and maintenance management and the like, and is widely applied to the cathodic protection of rotary filter screens of nuclear power plants and thermal power plants. However, in the conventional sacrificial anode project, the sacrificial anode is directly welded on the rotary filter screen body, and due to the fact that the number of the sacrificial anodes is large, the sacrificial anodes cannot be replaced in service, and the sacrificial anodes sometimes fall off during the operation of the rotary filter screen. Therefore, the application of the sacrificial anode in the field of rotary screen cathodic protection is limited to a certain extent.

Patent CN203346479U provides a sacrificial anode structure for temporary protection of drum filter screen, which is composed of iron core steel bar, aluminum alloy anode body, installation iron feet, cable connected with iron core and cable end waterproof sealing joint, the anode is designed into cylindrical structure, and iron feet with middle part bent at 135 degree included angle are welded on the anode iron core. When the anode is installed, a hole is formed in the concrete side wall in the drum-shaped filter screen chamber, the sacrificial anode is fixed on the concrete side wall by using an expansion bolt or a chemical bolt, and then a cable led out by the sacrificial anode is wired and protected by using a PVC protective pipe and a pipe clamp. 6 sacrificial anodes, for a total of 12, need to be mounted on each side wall of each drum screen chamber. Although the design idea of the sacrificial anode for temporary protection of the drum-shaped filter screen is given, the anode structure and the installation method thereof are complex, a scaffold needs to be erected during installation and construction, a PVC protective pipe needs to be adopted for wiring protection of a sacrificial anode cable, a plurality of holes need to be formed in a concrete wall in a drum-shaped screen chamber, and the integrity of the concrete protective layer is damaged; in addition, at the end of the temporary protection period, the scaffold is required to be set up again to remove the sacrificial anode, the cable and the protective pipe one by one. Therefore, the method has high construction cost and long operation period, and needs to drill holes at multiple positions of the concrete wall to damage the integrity of the concrete protective layer.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the proposition of above problem, and research design a rotary filter screen protection is with tensile formula sacrificial anode system, solve traditional rotary filter screen protection with sacrificial anode's structure and installation comparatively complicated, construction cost height, the long shortcoming of operating period. The utility model discloses a technical means as follows:

the utility model provides a tensile formula sacrificial anode system is used in rotary filter screen protection, includes rotary filter screen, wire rope and at least one sacrificial anode subassembly, rotary filter screen locates in the rotary filter screen cavity, wire rope is fixed in on the wall of rotary filter screen cavity, just wire rope with rotary filter screen's axis of rotation is connected, sacrificial anode subassembly includes sacrificial anode, connecting piece and fixed sleeve, the outside of connecting piece is equipped with sacrificial anode, the both ends of connecting piece respectively with a fixed sleeve fixed connection, fixed sleeve cover is located on the wire rope, and with wire rope fixed connection.

Preferably, the connecting piece is detachably connected with the fixed sleeve, and the fixed sleeve is connected with the steel wire rope in a cold pressing mode.

Preferably, the sacrificial anode assembly further comprises a first flange and a second flange, two ends of the connecting piece are respectively and fixedly connected with the first flange, the first flange is connected with the second flange, and the second flange is sleeved with the fixing sleeve.

Preferably, the connecting piece is of a hollow tubular structure, the steel wire rope penetrates through the connecting piece, the second flange is a flange with a neck, the neck of the second flange extends into the first flange, an internal thread is arranged in the second flange, and an external thread which is connected with the second flange in a matched mode is arranged on the outer side of the fixing sleeve.

Preferably, the steel wire ropes are of a multi-section structure, and the end parts of the adjacent steel wire ropes are fixedly connected with the fixing sleeves at the two ends of the connecting piece respectively;

the flange structure is characterized in that an annular stop block is arranged in the second flange, the periphery of the stop block is in sealing connection with the inner wall of the second flange, a fixing hole is formed in the stop block, one end of the fixing sleeve is provided with a fixing strip matched with the fixing hole, threads are arranged outside the fixing strip, and when the second flange is connected with the fixing sleeve in a sleeved mode, the fixing strip can penetrate through the fixing hole and is fixedly connected with the fixing hole through the threads and the nut.

Preferably, the rotary filter screen device further comprises a Y-shaped deconcentrator and a fastener, the cable is connected with the steel wire rope through the Y-shaped deconcentrator, the steel wire rope is connected with the rotary shaft of the rotary filter screen through the cable, the fastener comprises a support plate and a hanging lug, the support plate is fixed on the wall of the cavity of the rotary filter screen, the hanging lug is fixedly connected with the support plate, and the steel wire rope is connected with the hanging lug.

Preferably, one end of the steel wire rope is provided with a first cable joint, the first cable joint is connected with the hanging lifting lug, the other end of the steel wire rope is provided with a second cable joint, and the second cable joint is fixed on the wall of the rotary filter screen cavity through a bolt.

Preferably, at least one shear resistant member is provided between the connector and the sacrificial anode, the shear resistant member being connected to the connector.

Preferably, the anti-shearing piece is of an annular structure, and the anti-shearing piece is welded with the connecting piece or connected with the connecting piece through a hoop.

Preferably, the anti-shearing part is a pin, the connecting part is a low-alloy seamless steel pipe, two ends of the connecting part are welded with the first flange, the first flange is connected with the second flange through a bolt, the steel wire rope is a sealed steel wire rope, lubricating grease is arranged between strands of steel wires of the steel wire rope, a sheath is arranged outside the steel wire rope, the sheath is made of polyurethane or polyolefin, and the sacrificial anode is an aluminum-based sacrificial anode of aluminum-based, zinc-based, magnesium-based or outer-layer composite magnesium-based alloy.

Compared with the prior art, the tensile sacrificial anode system for protecting the rotary filter screen has the advantages that: the utility model provides a rotary filter screen tensile formula sacrificial anode cathodic protection system adopts the modular anode structure, adjustable sacrificial anode size and the mounted position on wire rope to adopt tensile formula to hang the installation, the installation is simple with the dismantlement, need not to set up the scaffold frame, but greatly reduced trompil quantity on the concrete wall effectively reduces construction cost, practices thrift installation cycle, and system later maintenance and change are simple. The sacrificial anode system has strong applicability, can be suitable for rotary filter screens with various structural forms and different design protection lives by adjusting and optimizing the structural size and the mounting position of the sacrificial anode, is suitable for long-term protection and temporary protection of newly-built drum nets, and is also suitable for service life extension transformation of in-service rotary filter screen cathode protection systems; the system can be used alone or in combination with an impressed current cathodic protection system. Besides, the anode structure of the utility model is also suitable for the sacrificial anode cathodic protection of the plate-frame type rotary filter screen of the nuclear power plant.

Drawings

Fig. 1 is a schematic view of an overall installation structure in embodiment 1 of the present invention.

Fig. 2 is a schematic view of an installation structure of the sacrificial anode assembly and the steel wire rope in embodiment 1 of the present invention.

Fig. 3 is an enlarged schematic structural view of a fastener according to embodiment 1 of the present invention.

Fig. 4 is a schematic structural view of a second cord segment in embodiment 1 of the present invention.

Fig. 5 is a schematic structural view of a plurality of sacrificial anode assemblies connected in series according to embodiment 1 of the present invention.

Fig. 6 is a schematic sectional view of the sacrificial anode body and the anode steel pipe core in embodiment 1 of the present invention.

Fig. 7 is a side view schematic of the structure of fig. 6.

Fig. 8 is a schematic cross-sectional view of the sacrificial anode assembly according to embodiment 1 of the present invention.

Fig. 9 is a side view schematic of the structure of fig. 8.

Fig. 10 is an enlarged schematic view of a portion a of fig. 8.

Fig. 11 is a schematic structural view of a plurality of sacrificial anode assemblies connected in series according to embodiment 2 of the present invention.

Fig. 12 is an overall sectional structural view of a sacrificial anode assembly in example 2 of the present invention.

Fig. 13 is a schematic side view of a second flange and a steel wire rope according to embodiment 2 of the present invention.

Fig. 14 is an enlarged schematic view of a portion B in fig. 12.

In the figure, 1, a rotary filter screen; 2. a sacrificial anode assembly; 3. a wire rope; 4. a fastener; 5. a bolt; 11. a rotating screen chamber; 21. a sacrificial anode; 22. a connecting member; 23. a first flange; 24. a second flange; 25. fixing the sleeve; 26. a shear resistant member; 27. a sheath; 28. a stopper; 29. a fixing hole; 30. a fixing strip; 31. shackle dismounting; 32. a chicken heart ring; 33. a first cable section; 34. a second rope section; 35. a Y-shaped splitter; 36. a cable; 41. a support plate; 42. and hanging a lifting lug.

Detailed Description

Example 1:

as shown in fig. 1 to 10, a tensile sacrificial anode system for protecting a rotary filter screen comprises a rotary filter screen 1 (specifically, a drum-shaped rotary filter screen), a steel wire rope 3, and a plurality of sacrificial anode assemblies 2 sleeved on the steel wire rope 3, wherein the rotary filter screen 1 is disposed in a rotary filter screen chamber 11, two ends of the steel wire rope 3 are fixed on a wall of the rotary filter screen chamber 11 through riggings, and the steel wire rope 3 is connected with a rotary shaft of the rotary filter screen 1 through a cable 36. The sacrificial anode assembly 2 comprises a sacrificial anode 21, a connecting piece 22, a first flange 23, a second flange 24 and a fixing sleeve 25, wherein the connecting piece 22 is of a hollow tubular structure, the steel wire rope 3 penetrates through the whole connecting piece 22, and the sacrificial anode 21 is arranged outside the connecting piece 22. Both ends of the connecting piece 22 are respectively welded with a first flange 23, and the first flange 23 is connected with a second flange 24 through bolts 5. The second flange 24 is a neck flange, the neck of which extends into the first flange 23 and is attached to the inner wall of the first flange 23, and an internal thread is arranged in the second flange 24. Outside wire rope 3 was located to the fixed sleeve 25 cover, fixed sleeve 25 was the dysmorphism structure of colding pressing, and the outside of fixed sleeve 25 one end is equipped with the external screw thread with second flange 24 complex, passes through threaded connection between fixed sleeve 25 and the second flange 24. The other end of the fixed sleeve 25 is attached to the outer side of the steel wire rope 3, and the attached end of the fixed sleeve 25 is hydraulically connected (specifically cold-pressed) with the steel wire rope 3 through a hydraulic die. The fixing sleeve 25 can be made of high-quality carbon structural steel, low-alloy structural steel and the like, the tensile breaking force of the compression joint is not lower than the breaking force of the steel wire rope 3, the fixing sleeve 25 is guaranteed to be stably connected with the steel wire rope 3, and meanwhile the structure of the steel wire rope 3 cannot be damaged.

The sacrificial anode 21 and the steel wire rope 3 are mechanically connected in series by using the first flange 23, the second flange 24, the fixing sleeve 25 and other structures, so that the problem of reduction of mechanical properties of the steel wire rope 3 in the casting process of the sacrificial anode 21 is solved, and the mechanical properties of the steel wire rope 3 are ensured while the sacrificial anode structure is formed. When the sacrificial anode structure is applied, the length required by the steel wire rope 3 is determined firstly, and because each structural unit can be detached, replaced and reconstructed, the mounting position of each structure can be specifically adjusted according to the service condition of the steel wire rope 3, and particularly the density degree of the sacrificial anode assembly 2 on the steel wire rope 3 can be controlled, so that the overall mounting of the sacrificial anode structure can be completed before mounting, and the production of the sacrificial anode is facilitated.

The connecting piece 22 is a seamless steel pipe with a low alloy structure, and has the advantages of light weight, good corrosion resistance, wide source and low cost. The outer side of the connecting piece 22 is provided with three anti-shearing pieces 26 which are uniformly arranged and made of the same material along the circumferential direction, so as to ensure the stability of the installation of the sacrificial anode 21, the number of the anti-shearing pieces 26 is not limited to three, and the number is determined according to the specific application working condition. The anti-shearing element 26 may be a ring structure, which is welded to the connecting element 22 or fixed by a hoop connection, and the connection is convenient and stable. The anti-shear element 26 may also be a pin welded to the connecting element 22, which allows for better electrical connection (multi-point electrical connection), while eliminating thermal expansion and cold contraction effects, without interface compatibility issues, and with better overall synergy of the sacrificial anode 21 and more stable installation.

After the sacrificial anode assembly 2 is fixed on the steel wire rope 3, the two ends of the steel wire rope 3 are fixed on the wall of the rotary filter screen cavity 11, and the steel wire rope 3 is stretched and tensioned through structures such as a wire tightener, so that the sacrificial anode assembly 2 is prevented from rubbing and colliding with the wall of the rotary filter screen cavity 11 under the action of water flow. The steel wire rope 3 is a totally-enclosed steel wire rope for ocean engineering, and lubricating grease with lubricating, water-blocking and anti-corrosion functions is filled among strands of steel wires of the steel wire rope 3. The steel wire rope 3 is externally provided with a sheath 27, a water-resistant layer is arranged between the steel wire rope 3 and the polymer sheath, and the sheath 27 is made of polyurethane or polyolefin and can prevent the steel wire rope 3 from being corroded. The sacrificial anode 21 is an aluminum-based sacrificial anode of aluminum-based, zinc-based or outer-layer composite magnesium-based alloy.

The top of the stretching sacrificial anode is provided with a steel cable branching device, namely a Y-shaped branching device 35, the steel cable 3 is connected with a cable 36 through the Y-shaped branching device 35 and is subjected to waterproof sealing, the cable 36 is connected to an end cover (or directly connected with a rotating shaft) of a rotating shaft base of the rotating filter screen 1, and reliable fastening connection and waterproof sealing are used. The fastener 4 is arranged on the concrete wall of the rotary screen chamber 11, the fastener 4 comprises a support plate 41 and a hanging lug 42, the support plate 41 is fixed on the wall of the rotary screen chamber 11, and the hanging lug 42 and the support plate 41 are of an integrated structure. One end of the steel wire rope 3 is provided with a first rope knot 33, and the first rope knot 33 is connected with the hanging lifting lug 42 by matching with a shackle 31 (a D-shaped shackle can be selected) and a chicken heart ring 32 and the like to form an upper anchoring point of the steel wire rope 3. The other end of the steel wire rope 3 is provided with a second cable joint 34, and the second cable joint 34 is fixed on the concrete wall of the rotary filter screen chamber 11 through a chemical bolt to form a lower anchoring point of the steel wire rope 3. The hanging lugs 42 and the supporting plates 41 of the new construction can be designed as metal embedded parts, and the embedded parts are fixed on a concrete wall when concrete is cast; for in-service engineering, a hole is formed in a concrete wall during installation, then the chemical anchor bolt is fixed in the concrete hole through the bar planting glue, and the support plate 41 is installed on the chemical anchor bolt through the bolt 5 after the bar planting glue is cured.

The utility model provides a pair of be applicable to and use interim sacrificial anode cathodic protection system during coastal power plant cydariform rotary filter screen debugging, to the actual engineering application, each structure and the part specification of this sacrificial anode 21 structure need be confirmed according to calculating, and concrete step is as follows: calculating and determining the size and the number of the sacrificial anodes 21 according to the protected structure area, the coating condition, the service working condition, the design protection age and the like; calculating and determining the arrangement position of the sacrificial anode 21 by using cathode protection numerical simulation software; according to the specification, the number, the position and the service working condition of the sacrificial anode 21, performing mechanical calculation to determine the specification of the first flange 23, the steel wire rope 3, the second flange 24 and other structures; according to the self weight and the stress condition of each group of sacrificial anodes 21, the specifications of the metal embedded parts (the fastening pieces 4) and the rigging are calculated, so that the metal embedded parts can effectively resist the impact of high-speed water flow in the drum net cavity, and the sacrificial anodes 21 can be prevented from rubbing and colliding with the concrete wall under the action of the water flow. The output current capability of the tensile sacrificial anode system can meet the protection requirements of the rotary filter screen at the early stage and the final stage of the design.

The mounting principle of the sacrificial anode structure in this embodiment is as follows: prefabricating a sacrificial anode structure on the steel wire rope 3 according to actual working conditions, namely fixing a fixing sleeve 25 on the steel wire rope 3, connecting and fixing a second flange 24 and the fixing sleeve 25 through threads, penetrating the steel wire rope 3 through a connecting piece 22, fixing a first flange 23 and a second flange 24 at the end part of the connecting piece 22 through a bolt 5, and arranging a sacrificial anode 21 on the connecting piece 22 in a surrounding mode. If parts need to be maintained and replaced in the application process, the first flange 23 and the second flange 24 can be directly disassembled, and then specific parts are replaced, so that the operation is convenient. Two ends of a steel wire rope 3 are fixed in the rotary filter screen chamber 11 through an upper anchoring point and a lower anchoring point respectively, the installation position of a chemical bolt 5 is determined according to the length of the stretching type sacrificial anode 21 system, after the installation of the anchoring points on the sacrificial anode 21 system is finished, a nut is used for fastening a cable joint at the tail end of the steel wire rope 3 on the chemical bolt 5, and finally a tightener is arranged on the steel wire rope 3, so that the whole steel wire rope 3 is tightened, and the fixation of the whole sacrificial anode system is completed.

The utility model discloses the cathodic protection to the rotatory filter screen among coastal nuclear power and the seawater filtration system of thermal power plant has developed the sacrificial anode cathodic protection system of one set of stretching type installation. When guaranteeing the protection effect, the installation is simple with the dismantlement, need not to set up the scaffold frame and at concrete wall trompil, can effectively reduce construction cost, practice thrift installation cycle. The utility model discloses positive pole structural style is applicable to rotary filter screen long-term cathodic protection and interim cathodic protection simultaneously, but the exclusive use also can jointly use with impressed current cathodic protection system, carries out the local protection of strengthening. Besides, the anode structure of the utility model is also suitable for the temporary anticorrosion protection of the plate-and-frame rotary filter screen of the nuclear power plant in the construction and debugging stages.

Example 2:

as shown in fig. 11 to 14, the difference from embodiment 1 is that the steel wire ropes 3 are multi-segment type structures, and adjacent steel wire ropes 3 are connected by the sacrificial anode assembly 2. Specifically, both ends of each section of steel wire rope 3 are all connected with fixed sleeve 25, the inside of fixed sleeve 25 be with steel wire rope 3 complex hollow structure, the one end of fixed sleeve 25 is for being used for cup jointing steel wire rope 3's opening, the other end is enclosed construction, is connected fixedly through hydraulic pressure between fixed sleeve 25 and the steel wire rope 3. An annular stop block 28 is arranged in the second flange 24, the periphery of the stop block 28 is connected with the inner wall of the second flange 24 in a sealing mode, and a fixing hole 29 is formed in the stop block 28. The closed end of the fixed sleeve 25 is provided with a fixed strip 30 matched with the fixed hole 29, and when the second flange 24 is sleeved with the fixed sleeve 25, the fixed strip 30 passes through the fixed hole 29 and extends into the connecting piece 22. The fixing strip 30 is provided with an external thread, and one end of the fixing strip 30 extending into the connecting piece 22 can be matched with the nut, so that the fixing strip 30 and the fixing hole 29 are fixedly connected, and the fixing between the second flange 24 and the fixing sleeve 25 can be realized. The second flange 24 is a neck flange, the neck of which extends into the connecting piece 22, and after the fixing strip 30 passes through the fixing hole 29 and is fixed by a nut, a filler (which may be epoxy resin or the like) is arranged at the neck of the second flange 24, so that good sealing performance between the fixing strip 30 and the fixing hole 29 is ensured.

The installation principle in this embodiment is: the length of each section of the steel wire rope 3 is determined according to the position where the sacrificial anode 21 needs to be installed, the fixing sleeve 25 is fixed at the end of the steel wire rope 3 in a hydraulic mode, the fixing sleeve 25 is fixed in the second flange 24 through the fixing strip 30, the second flange 24 and the first flange 23 are fixed through the bolts 5, the first flange 23 is welded with the connecting piece 22, and the sacrificial anode 21 is arranged on the connecting piece 22 in a surrounding mode. When a certain part in the structure of the sacrificial anode 21 is damaged or needs to be replaced, the first flange 23 and the second flange 24 can be detached firstly, and part of the sacrificial anode assembly 2 can be maintained or replaced independently, so that underwater operation is facilitated. After the sacrificial anode 21 is installed, the two ends of the steel wire rope 3 are fixed in the rotary filter screen chamber 11 through the upper anchoring point and the lower anchoring point respectively, and the steel wire rope 3 is tightened through the tightener to complete the fixation of the whole sacrificial anode system.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a rotary screen protection is with tensile formula sacrificial anode system which characterized in that: including rotary screen (1), wire rope (3) and at least one sacrificial anode assembly (2), rotary screen (1) is located in rotary screen cavity (11), wire rope (3) are fixed in on the wall of rotary screen cavity (11), just wire rope (3) with the rotation axis of rotary screen (1) is connected, sacrificial anode assembly (2) are including sacrificial anode (21), connecting piece (22) and fixed sleeve (25), the outside of connecting piece (22) is equipped with sacrificial anode (21), the both ends of connecting piece (22) respectively with a fixed sleeve (25) fixed connection, fixed sleeve (25) cover is located on wire rope (3), and with wire rope (3) fixed connection.

2. The rotary screen protection tensile sacrificial anode system of claim 1, wherein: the connecting piece (22) is detachably connected with the fixed sleeve (25), and the fixed sleeve (25) is connected with the steel wire rope (3) in a cold pressing mode.

3. The rotary screen protection tensile sacrificial anode system of claim 2, wherein: the sacrificial anode assembly (2) further comprises a first flange (23) and a second flange (24), two ends of the connecting piece (22) are fixedly connected with the first flange (23) respectively, the first flange (23) is connected with the second flange (24), and the second flange (24) is sleeved with the fixing sleeve (25).

4. The rotary screen protection tensile sacrificial anode system of claim 3, wherein: connecting piece (22) are hollow tubular structure, wire rope (3) run through connecting piece (22), second flange (24) are the flange of taking the neck, and its neck stretches into in first flange (23), be equipped with the internal thread in second flange (24), the outside of fixed sleeve (25) be equipped with the external screw thread that second flange (24) cooperation is connected.

5. The rotary screen protection tensile sacrificial anode system of claim 3, wherein: the steel wire ropes (3) are of a multi-section structure, and the end parts of the adjacent steel wire ropes (3) are fixedly connected with the fixed sleeves (25) at the two ends of the connecting piece (22) respectively;

be equipped with annular dog (28) in second flange (24), dog (28) all around with the inner wall sealing connection of second flange (24), be equipped with fixed orifices (29) on dog (28), the one end of fixed sleeve (25) be equipped with fixed orifices (29) complex fixed strip (30), fixed strip (30) are equipped with the screw thread outward, second flange (24) with when fixed sleeve (25) cup joint, fixed strip (30) can pass fixed orifices (29) and through screw thread and nut with fixed orifices (29) fixed connection.

6. The rotary screen protection tensile sacrificial anode system of any one of claims 3 to 5, wherein: the rotary filter screen fixing device is characterized by further comprising a Y-shaped deconcentrator (35) and a fastener (4), a cable (36) is connected with the steel wire rope (3) through the Y-shaped deconcentrator (35), the steel wire rope (3) is connected with a rotary shaft of the rotary filter screen (1) through the cable (36), the fastener (4) comprises a supporting plate (41) and a hanging lug (42), the supporting plate (41) is fixed on the wall of the rotary filter screen chamber (11), the hanging lug (42) is fixedly connected with the supporting plate (41), and the steel wire rope (3) is connected with the hanging lug (42).

7. The rotary screen protection tensile sacrificial anode system of claim 6, wherein: one end of the steel wire rope (3) is provided with a first rope socket (33), the first rope socket (33) is connected with the hanging lifting lug (42), the other end of the steel wire rope (3) is provided with a second rope socket (34), and the second rope socket (34) is fixed on the wall of the rotary filter screen chamber (11) through a bolt (5).

8. The rotary screen protection tensile sacrificial anode system of claim 6, wherein: at least one anti-shearing piece (26) is arranged between the connecting piece (22) and the sacrificial anode (21), and the anti-shearing piece (26) is connected with the connecting piece (22).

9. The rotary screen protection tensile sacrificial anode system of claim 8, wherein: the anti-shearing piece (26) is of an annular structure, and the anti-shearing piece (26) is welded with the connecting piece (22) or connected with the connecting piece through a hoop.

10. The rotary screen protection tensile sacrificial anode system of claim 8, wherein: the anti-shearing device is characterized in that the anti-shearing part (26) is a pin, the connecting part (22) is a low-alloy seamless steel pipe, two ends of the connecting part (22) are welded with the first flange (23), the first flange (23) is connected with the second flange (24) through a bolt (5), the steel wire rope (3) is a sealed steel wire rope, lubricating grease is arranged between strands of steel wires of the steel wire rope (3), a sheath (27) is arranged outside the steel wire rope (3), the sheath (27) is made of polyurethane or polyolefin, and the sacrificial anode (21) is an aluminum-based sacrificial anode of aluminum-based, zinc-based, magnesium-based or outer-layer composite magnesium-based alloy.