Cathode protection device of sacrificial anode

Abstract

The cathode protection device comprises a support, a cylinder and a bottom cover, the support comprises a transverse plate and a vertical plate, a lower annular flange is arranged on the bottom wall of the transverse plate, an annular notch is formed in the edge of the top end of the cylinder, the lower annular flange is matched with the annular notch, a plurality of screw holes are formed in the top wall of the cylinder, and a through hole is formed in the transverse plate. An opening is formed in the lower end of the barrel, an upper annular flange is arranged on the top wall of the bottom cover, the upper annular flange is in threaded connection with the inner wall of the opening of the barrel, a core rod is arranged on the bottom wall of the bottom cover, the core rod is formed by alternately connecting convex sections and concave sections, and the outline section of the outer wall of each convex section is in a convex arc shape. The profile of the outer wall of the concave section is an inner concave cambered surface, the joint of the convex section and the concave section is in arc transition, a zinc rod outer layer is arranged outside the core rod and wraps the core rod, the diameter of the zinc rod outer layer corresponds to that of the bottom cover, and the support, the barrel, the bottom cover and the core rod are all made of steel.

Description

Technical Field

[0001] The utility model relates to the anti-rust protection technology of underground gas pipelines, and particularly relates to a sacrificial anode cathodic protection device. Background Art

[0002] After the protective layer of a steel buried pipeline is damaged, the steel surface of the pipeline will directly contact the soil. The material of the pipeline is steel, and carbon and other impurities are mixed in the steel. The activity of the carbon and other impurities is weaker than that of iron. Therefore, an anodic region is formed in some parts of the pipeline, and a cathodic region is formed in some parts of the pipeline. Also, because the soil contains oil and moisture and has a certain conductivity, the iron element in the anodic region of the pipeline loses electrons, and the electrons flow along the soil to the cathodic region of the pipeline, forming a current loop between the anodic region and the cathodic region, resulting in electrochemical corrosion, and the iron element at the anodic region will be corroded more rapidly.

[0003] To avoid electrochemical corrosion of steel buried pipelines, generally, sacrificial anodes (usually zinc, etc.) are buried in the ground and led to the steel buried pipelines through wires, so that zinc becomes the anode and provides electrons for the steel buried pipelines to protect them.

[0004] To ensure that the sacrificial anode can continuously protect the buried pipeline, every once in a while, the old sacrificial anode needs to be dug out and replaced. Each time the sacrificial anode is replaced, corresponding wiring needs to be redone, making the replacement process cumbersome and inefficient. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a sacrificial anode cathodic protection device, which can simplify the replacement process of the sacrificial anode and improve the construction efficiency.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A cathodic protection device with sacrificial anodes, comprising a bracket, a cylinder body and a bottom cover. The bracket includes a horizontal plate and a vertical plate. The bottom wall of the horizontal plate is provided with a lower annular flange, and the top edge of the cylinder body is provided with an annular notch. The lower annular flange is matched with the annular notch. The top wall of the cylinder body is provided with a plurality of screw holes, and the horizontal plate is provided with a through hole. The cylinder body is fixedly connected to the horizontal plate by screws. The vertical plate is used to be fixed to an underground embedded base. The lower end of the cylinder body is provided with an opening. The top wall of the bottom cover is provided with an upper annular flange, and the upper annular flange is threadedly connected to the inner wall of the opening of the cylinder body. The bottom wall of the bottom cover is provided with a mandrel, which is formed by alternately connecting convex segments and concave segments. The outer wall contour section of the convex segment is an outwardly convex arc, and the outer wall contour of the concave segment is an inwardly concave arc surface. The connection between the convex segment and the concave segment is transitioned by an arc. A zinc rod outer layer is provided outside the mandrel, and the zinc rod outer layer wraps the mandrel. The diameter of the zinc rod outer layer corresponds to that of the bottom cover. The materials of the bracket, the cylinder body, the bottom cover and the mandrel are all steel. Two connecting chambers are provided on the inner wall of the cylinder body, and the two connecting chambers are symmetrically distributed about the central axis of the cylinder body. The opening of the connecting chamber is communicated with the outside. The inner wall of the connecting chamber is provided with internal threads, and the connecting chamber is used to be threadedly connected to a wire joint.

[0008] Specifically, the lower annular flange is provided with two alignment notches, and the edge of the opening of the connecting chamber is provided with alignment blocks, which can be inserted into the alignment notches.

[0009] Specifically, a reinforcing flange is provided on the bottom side of the top wall of the cylinder body. The reinforcing flange serves as the side wall of the connecting chamber, and six reinforcing rib plates are provided between the outer wall of the reinforcing flange and the outer wall of the cylinder body.

[0010] Specifically, an upper mating block is provided at the opening edge of the cylinder body. The bottom side of the upper mating block is provided with a mating notch, and the upper mating block is provided with two pin holes.

[0011] Specifically, a lower mating block is provided at the edge of the bottom cover. The lower mating block can be mated with the mating notch. The lower mating block is provided with two pin holes, and the locking pins can pass through the pin holes.

[0012] Specifically, the cathodic protection device is provided with a locking member, which is in a U shape, thus forming two pins. The locking member is elastic. When the two pins are inserted into the corresponding jacks, the two pins are forced to produce elastic deflection.

[0013] Specifically, a reinforcing side piece is provided at the horizontal edge of the vertical plate. The front edge of the reinforcing side piece is tangent to the lower annular flange, and three reinforcing pieces are provided between the rear side of the outer wall of the lower annular flange and the vertical plate.

[0014] Specifically, the vertical plate is provided with two mounting holes.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The mandrel is provided with an outer layer of zinc rod formed by casting, and the outer layer of zinc rod wraps the mandrel. The materials of the bracket, cylinder, bottom cover and mandrel are all steel. Zinc has a stronger ability to lose electrons than steel (iron). The electrons lost by zinc flow through the mandrel, bottom cover, cylinder and wire to the gas pipeline to be protected, which can protect the gas pipeline to be protected and prevent the steel (iron) of the gas pipeline to be protected from electrochemical corrosion. Similarly, it can protect the cylinder, bottom cover and bracket from electrochemical corrosion.

[0017] The mandrel is formed by alternating convex segments and concave segments. The outer wall contour section of the convex segment is a convex arc, and the outer wall contour of the concave segment is a concave arc surface, so that there is a large contact area between the surface of the mandrel and the outer layer of the zinc rod, which is beneficial to the flow of electrons. After using for a period of time, when the outer layer of the zinc rod becomes thinner, a pit can be dug to expose the cathodic protection device to replace the outer layer of the zinc rod. Since the vertical plate is fixedly installed on the underground embedded base, that is, both the bracket and the cylinder are fixedly connected to the underground embedded base. Therefore, when replacing the outer layer of the zinc rod, only the locking part needs to be removed, and then the bottom cover is screwed out, and the old outer layer of the zinc rod can be removed and a new old outer layer of the zinc rod can be installed.

[0018] The edge of the bottom cover is provided with a lower mating block. When the bottom cover is rotated until the lower mating block is mated with the mating notch, the pin holes of the lower mating block are aligned with the pin holes of the upper mating block. Inserting the two pins of the locking part into the corresponding pin holes will cause the two pins to be forced to have an elastic deviation, thus forming a friction self-locking.

[0019] The cylinder of the cathodic protection device of the present utility model is fixedly connected to the underground embedded base, and the wires are connected between two adjacent cylinders, so that the wires and the cylinder form a stable system. When digging a pit to replace the outer layer of the zinc rod later, there is no need to reconnect the wires, which ensures the reliability of the protection system, simplifies the process of replacing the core, and improves the construction efficiency. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 A three-dimensional view of the sacrificial anode cathodic protection device, with the outer layer of the zinc rod shown in dotted lines;

[0022] Figure 2 An exploded view of the sacrificial anode cathodic protection device;

[0023] Figure 3 A view of the bracket;

[0024] Figure 4 A view of the cylinder;

[0025] Figure 5 View of the bottom cover.

[0026] In the figure:

[0027] 1. Bracket; 11. Horizontal plate; 111. Lower annular flange; 1111. Alignment notch; 12. Vertical plate; 13. Reinforcing side piece; 14. Reinforcing piece;

[0028] 2. Cylinder; 21. Annular notch; 211. Alignment block; 22. Connection chamber; 23. Upper mating block; 231. Mating notch; 24. Reinforcing flange; 25. Reinforcing rib;

[0029] 3. Bottom cover; 31. Upper annular flange; 32. Mandrel; 321. Convex section; 322. Concave section; 33. Lower mating block;

[0030] 4. Outer layer of zinc rod;

[0031] 5. Locking member; 51. Bolt. Specific implementation mode

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0033] See Figures 1 to 5 , a sacrificial anode cathodic protection device, including a bracket 1, a cylinder 2 and a bottom cover 3. The bracket 1 includes a horizontal plate 11 and a vertical plate 12. The bottom wall of the horizontal plate 11 is provided with a lower annular flange 111.

[0034] The top edge of the cylinder 2 is provided with an annular notch 21, and the lower annular flange 111 cooperates with the annular notch 21. The top wall of the cylinder 2 is provided with a plurality of screw holes, and the horizontal plate 11 is provided with through holes. The cylinder 2 is fixedly connected to the horizontal plate 11 by screws. The vertical plate 12 is used to be fixed to an underground embedded base (not shown in the figure).

[0035] The lower end of the cylinder 2 is provided with an opening. The top wall of the bottom cover 3 is provided with an upper annular flange 31, and the upper annular flange 31 is threadedly connected to the inner wall of the opening of the cylinder 2. The bottom wall of the bottom cover 3 is provided with a mandrel 32. The mandrel 32 is alternately connected by a convex section 321 and a concave section 322. The outer wall profile cross-section of the convex section 321 is an outwardly convex arc, and the outer wall profile of the concave section 322 is an inwardly concave arc surface. The connection between the convex section 321 and the concave section 322 is transitioned by an arc. An outer layer of zinc rod 4 is provided outside the mandrel 32. The outer layer of zinc rod 4 wraps the mandrel 32, and the diameter of the outer layer of zinc rod 4 corresponds to that of the bottom cover 3. The materials of the bracket 1, the cylinder 2, the bottom cover 3 and the mandrel 32 are all steel.

[0036] See Figure 4, there are two connecting chambers 22 provided on the inner wall of the cylinder body 2. The two connecting chambers 22 are symmetrically distributed about the central axis of the cylinder body 2, and the openings of the connecting chambers 22 communicate with the outside. The inner wall of the connecting chamber 22 is provided with internal threads ( Figure 2 at A in

[0037] ). The connecting chamber 22 is used for threaded connection with a wire joint (not shown in the figure). Figure 2 Specifically, as shown in

[0038] , the lower annular flange 111 is provided with two alignment notches 1111, and the edge of the opening of the connecting chamber 22 is provided with an alignment block 211. The alignment block 211 can be inserted into the alignment notch 1111. Figure 4 Specifically, as shown in

[0039] , a reinforcing flange 24 is provided on the bottom side of the top wall of the cylinder body 2. The reinforcing flange 24 serves as the side wall of the connecting chamber 22, and six reinforcing rib plates 25 are provided between the outer wall of the reinforcing flange 24 and the outer wall of the cylinder body 2. Figure 1 、 Figure 2 、 Figure 4 , an upper fitting block 23 is provided at the opening edge of the cylinder body 2. A fitting notch 231 is provided on the bottom side of the upper fitting block 23, and two pin holes are provided on the upper fitting block 23.

[0040] Specifically, a lower fitting block 33 is provided at the edge of the bottom cover 3. The lower fitting block 33 can be fitted with the fitting notch 231. Two pin holes are provided on the lower fitting block 33 for the locking pin to pass through.

[0041] Specifically, the cathodic protection device of the present utility model is provided with a locking member 5. The locking member 5 is in a U shape, thus forming two insertion pins 51. The locking member 5 has elasticity. When the two insertion pins 51 are inserted into the corresponding insertion holes, the two insertion pins 51 are forced to produce elastic deflection.

[0042] Specifically, as shown in Figure 3 , a reinforcing side piece 13 is provided at the transverse edge of the vertical plate 12. The front edge of the reinforcing side piece 13 is tangent to the lower annular flange 111. Three reinforcing pieces 14 are provided between the rear side of the outer wall of the lower annular flange 111 and the vertical plate 12.

[0043] Specifically, the vertical plate 12 is provided with two mounting holes.

[0044] The working principle of the sacrificial anode cathodic protection device of the present utility model is as follows:

[0045] A long pit is excavated at a certain distance from the gas pipeline to be protected. In the long pit, an underground embedded base (not shown in the figure) is buried at intervals of a certain distance. The vertical plate 12 is provided with two mounting holes, and the vertical plate 12 is installed on the underground embedded base through bolts, thus completing the installation of a single cathodic protection device.

[0046] Both ends of the wire connecting two adjacent cathodic protection devices are provided with threaded joints, and the threaded joints are threadedly connected to the internal threads of the connection chamber 22, so as to achieve the electrical connection of two adjacent cathodic protection devices. After completing the wiring between the cathodic protection devices, lead the end wire to the gas pipeline to be protected, and finally fill the long pit, then the installation of the cathodic protection system is completed.

[0047] Outside the mandrel 32, there is a zinc rod outer layer 4 formed by casting (see Figure 1 ), and the zinc rod outer layer 4 wraps the mandrel 32. The materials of the bracket 1, the cylinder 2, the bottom cover 3 and the mandrel 32 are all steel. Zinc has a stronger ability to lose electrons than steel (iron). The electrons lost by zinc flow through the mandrel 32, the bottom cover 3, the cylinder 2 and the wire to the gas pipeline to be protected, which can protect the gas pipeline to be protected and prevent the steel (iron) of the gas pipeline to be protected from electrochemical corrosion. Similarly, it can protect the cylinder 2, the bottom cover 3 and the bracket 1 from electrochemical corrosion.

[0048] The mandrel 32 is formed by alternating convex segments 321 and concave segments 322. The outer wall contour section of the convex segment 321 is an outward convex arc, and the outer wall contour of the concave segment 322 is an inward concave arc surface, so that there is a large contact area between the surface of the mandrel 32 and the zinc rod outer layer 4, which is beneficial to the flow of electrons. After using for a period of time, when the zinc rod outer layer 4 becomes thinner, a pit can be dug to expose this cathodic protection device, so as to replace the zinc rod outer layer 4. Since the vertical plate 12 is fixedly installed on the underground embedded base (not shown in the figure), that is, both the bracket 1 and the cylinder 2 are fixedly connected to the underground embedded base. Therefore, when replacing the zinc rod outer layer 4, only need to remove the locking part 5, and then screw out the bottom cover 3, then the old zinc rod outer layer 4 can be removed and a new old zinc rod outer layer 4 can be installed.

[0049] The edge of the bottom cover 3 is provided with a lower fitting block 33. When the bottom cover 3 is rotated until the lower fitting block 33 is fitted with the fitting notch 231, the pin holes of the lower fitting block 33 are aligned with the pin holes of the upper fitting block 23. Insert the two pins 51 of the locking part 5 into the corresponding pin holes, and the two pins 51 will be forced to generate elastic deviation, thus forming frictional self-locking.

[0050] The cylinder 2 of the cathodic protection device of the present invention is fixedly connected to the underground embedded base (not shown in the figure), and the wires are connected between two adjacent cylinders 2, so that the wires and the cylinder 2 form a stable system. When digging a pit to replace the zinc rod outer layer 4 later, there is no need to re-wire, which ensures the reliability of the protection system, simplifies the core replacement process and improves the construction efficiency.

[0051] The above is only the preferred embodiment of the present utility model and does not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above in the preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to form equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A sacrificial anode cathodic protection device, characterized in that: It includes a bracket, a cylinder body and a bottom cover. The bracket includes a horizontal plate and a vertical plate. The bottom wall of the horizontal plate is provided with a lower annular flange. The top edge of the cylinder body is provided with an annular notch. The lower annular flange is matched with the annular notch. The top wall of the cylinder body is provided with a number of screw holes. The horizontal plate is provided with a through hole. The cylinder body is fixedly connected to the horizontal plate by screws. The vertical plate is used to be fixed on an underground embedded base. The lower end of the cylinder body is provided with an opening. The top wall of the bottom cover is provided with an upper annular flange. The upper annular flange is threadedly connected to the inner wall of the opening of the cylinder body. The bottom wall of the bottom cover is provided with a core rod. The core rod is formed by alternating convex segments and concave segments. The outer wall contour section of the convex segment is a convex arc. The outer wall contour of the concave segment is a concave arc surface. The connection between the convex segment and the concave segment is transitioned by an arc. An outer zinc rod layer is provided outside the core rod. The outer zinc rod layer wraps the core rod. The diameter of the outer zinc rod layer corresponds to that of the bottom cover. The materials of the bracket, the cylinder body, the bottom cover and the core rod are all steel. Two connection chambers are provided on the inner wall of the cylinder body. The two connection chambers are symmetrically distributed about the central axis of the cylinder body. The opening of the connection chamber communicates with the outside. The inner wall of the connection chamber is provided with internal threads. The connection chamber is used to be threadedly connected to a wire joint.

2. The sacrificial anode cathodic protection device according to claim 1, characterized in that: The lower annular flange is provided with two alignment notches. The edge of the opening of the connection chamber is provided with alignment blocks. The alignment blocks can be inserted into the alignment notches.

3. The sacrificial anode cathodic protection device according to claim 1, characterized in that: A reinforcing flange is provided on the bottom side of the top wall of the cylinder body. The reinforcing flange serves as the side wall of the connection chamber. Six reinforcing rib plates are provided between the outer wall of the reinforcing flange and the outer wall of the cylinder body.

4. The sacrificial anode cathodic protection device according to claim 1, characterized in that: An upper mating block is provided at the opening edge of the cylinder body. A mating notch is provided on the bottom side of the upper mating block. The upper mating block is provided with two pin holes.

5. The sacrificial anode cathodic protection device according to claim 4, characterized in that: A lower mating block is provided at the edge of the bottom cover. The lower mating block can be mated with the mating notch. The lower mating block is provided with two pin holes. The pin holes are for a locking pin to pass through.

6. The sacrificial anode cathodic protection device according to claim 5, wherein: The cathodic protection device is provided with a locking member. The locking member is in a U shape, thus forming two pins. The locking member is elastic. When the two pins are inserted into the corresponding pin holes, the two pins are forced to elastically deflect.

7. The sacrificial anode cathodic protection device according to claim 1, characterized in that: A reinforcing side piece is provided at the horizontal edge of the vertical plate. The front edge of the reinforcing side piece is tangent to the lower annular flange. Three reinforcing pieces are provided between the rear side of the outer wall of the lower annular flange and the vertical plate.

8. The sacrificial anode cathodic protection device according to claim 1, characterized in that: The vertical plate is provided with two mounting holes.

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