Anti-lightning-stroke anti-surge cathode protection insulation joint

Abstract

The utility model provides an anti-lightning and anti-surge cathode protection insulation joint, comprising an upper conduit, the lower end of which is connected with a baffle ring, a lower conduit, the upper end of which is connected with a joint, and a first insulation ring arranged between the baffle ring and the joint; the sleeve is arranged outside the baffle ring and the connector in a sleeving mode, a second insulating ring is arranged between the inner plane of the lower end and the connector, and a gap is formed among the shoulder side face of the connector, the first insulating ring, the sleeve and the second insulating ring; the shoulder side face of the connector is provided with an annular protruding part, a first bolt penetrates through the sleeve, the end of the first bolt extends into the gap and is provided with an electrode disc, and the protruding face of the annular protruding part and the disc face of the electrode disc are each provided with an alloy material layer to form two electrodes. In the manufacturing process, the discharge gap between the two electrodes can be adjusted by screwing the first bolt. The lightning-proof and surge-proof power supply is good in lightning-proof and surge-proof performance, good in adjustable performance and free of maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of internal discharge insulating joints, and in particular to a lightning strike and surge protection cathodic protection insulating joint. Background Technology

[0002] An internal discharge insulating joint is a connector designed to provide insulation protection between two cables or wires at their connection point and possesses an internal discharge function. It has an internal discharge gap to release accumulated charge when needed, preventing damage to equipment due to excessive voltage. The size of this discharge gap is directly related to the discharge voltage. If the gap is too small, discharge will occur below 3KV, causing the insulating joint to fail; if the gap is too large, high voltage cannot be released during a lightning strike, damaging the insulating joint. This makes the manufacturing requirements for existing internal discharge insulating joints extremely high, demanding very high machining precision.

[0003] High precision requirements increase costs and limit product market competitiveness. Meanwhile, insufficient precision can lead to a series of problems, including uneven electric field distribution, decreased insulation performance, shortened lifespan, safety hazards, and compromised system stability.

[0004] Therefore, improvements to existing technologies are necessary. Utility Model Content

[0005] This utility model provides a lightning strike and surge protection cathodic protection insulating joint to solve the above problems.

[0006] One technical solution adopted by this utility model is: providing a lightning strike and surge protection cathodic protection insulating joint, comprising:

[0007] The upper conduit and the lower conduit are connected, with the lower end of the upper conduit connected to the retaining ring and the upper end of the lower conduit connected to the connector. A first insulating ring is provided between the retaining ring and the connector.

[0008] A sleeve is fitted over the retaining ring and the connector. The upper end of the sleeve is connected to the retaining ring. A second insulating ring is provided between the inner plane of the lower end of the sleeve and the connector. A gap is formed between the shoulder side of the connector, the first insulating ring, the sleeve and the second insulating ring.

[0009] The connector has an annular protrusion on its shoulder side. An alloy material layer is provided on the raised surface of the annular protrusion to form an electrode. A first bolt is provided through the sleeve. The end of the first bolt extends into the gap and is provided with an electrode disk. An alloy material layer is also provided on the surface of the electrode disk to form another electrode. During the manufacturing process, the discharge gap between the two electrodes can be adjusted by turning the first bolt.

[0010] Furthermore, the surfaces of the retaining ring and the connector that contact the first insulating ring are each provided with a sealing ring.

[0011] Furthermore, the sleeve is also provided with an observation hole for observing the discharge situation within the gap, and a second bolt is provided at the observation hole for sealing the observation hole.

[0012] Furthermore, the alloy material layer is formed by brazing copper-silver alloy or molybdenum alloy.

[0013] Furthermore, the inner surface of the lower end of the sleeve is filled with epoxy resin between the connector and the lower conduit to achieve a sealing and corrosion-proof effect.

[0014] Furthermore, a third insulating ring is provided on the shoulder side of the connector, and epoxy is filled between the third insulating ring and the first insulating ring to control the height of the gap and achieve the purpose of explosion-proof and corrosion-proof.

[0015] Furthermore, the sleeve is also provided with an epoxy injection hole for injecting epoxy resin.

[0016] The beneficial effects of this utility model of a lightning strike and surge protection cathodic protection insulating joint are:

[0017] 1. An annular protrusion and a disk with an alloy material layer are set in the gap to form two electrodes. The position of the disk is adjusted by the first bolt to achieve the required discharge gap, which makes the lightning protection and surge protection performance of the insulating joint good. After the improvement, the processing precision and manufacturing cost required for the entire structure are reduced, the adjustability is good, and maintenance is required. Attached Figure Description

[0018] Figure 1 This is a front view of a lightning strike and surge protection cathodic protection insulating joint according to the first embodiment of this utility model;

[0019] Figure 2 yes Figure 1 Enlarged view of the discharge gap;

[0020] The components in the attached diagram are labeled as follows: 1. Upper conduit, 2. Lower conduit, 3. Retaining ring, 4. Connector, 5. Sleeve, 6. First insulating ring, 7. Second insulating ring, 8. Third insulating ring, 9. Epoxy filler, 31. Sealing ring, 41. Annular protrusion, 51. First bolt.

[0021] 52. Electrode disk; 53. Second bolt; 54. Epoxy injection hole. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "horizontal", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and should not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Please see Figure 1 and Figure 2 The first embodiment of this utility model provides a lightning strike and surge protection cathodic protection insulating connector, comprising:

[0025] The upper conduit 1 and the lower conduit 2 are provided. The lower end of the upper conduit 1 is connected to the retaining ring 3, and the upper end of the lower conduit 2 is connected to the connector 4. A first insulating ring 6 is provided between the retaining ring 3 and the connector 4, and a sealing ring 31 is provided on the contact surfaces of the retaining ring 3 and the first insulating ring 6, and the connector 4 and the first insulating ring 6.

[0026] Sleeve 5 is sleeved on the outside of retaining ring 3 and connector 4. The upper end of sleeve 5 is connected to retaining ring 3. A second insulating ring 7 is provided between the inner plane of the lower end of sleeve 5 and connector 4. A gap is formed between the shoulder side of connector 4, the first insulating ring 6, sleeve 5 and the second insulating ring 7.

[0027] The third insulating ring 8 is set on the shoulder side of the connector 4. Epoxy filling 9 is applied between it and the first insulating ring 6 to reduce the height of the gap to a suitable range and achieve the purpose of explosion-proof and corrosion-proof, thus preventing electric sparks from contacting the internal natural gas and causing an explosion.

[0028] The epoxy injection hole 54 penetrates the side of the sleeve 5 and connects the space between the first insulating ring 6 and the third insulating ring 8, and is used for injecting epoxy resin.

[0029] The shoulder side of the connector 4 is provided with an annular protrusion 41 (located in the gap), and an alloy material layer is provided on the protruding surface of the annular protrusion 41 to form an electrode. A first bolt 51 is provided through the side of the sleeve 5. The first bolt 51 is perpendicular to the central axis of the annular protrusion 41. The end of the first bolt 51 extends into the gap and is provided with an electrode disk 52. An alloy material layer is also provided on the disk surface of the electrode disk 52 to form another electrode.

[0030] On the other side of the sleeve 5, at a location symmetrical to the first bolt 51, there is an observation hole for observing the discharge situation in the gap. A second bolt 53 is installed at the observation hole to seal it.

[0031] When manufacturing the insulating joint, first set the discharge point voltage, observe the discharge arc through the observation hole on the other side, weld and fix the first bolt 51 to determine the discharge gap, then use the second bolt 53 to block the observation hole. After fixing, pour epoxy through the epoxy injection hole 54 to make it a sealed space.

[0032] Specifically, epoxy filling 9 is also applied between the inner side of the lower end of the sleeve 5 and the joint 4 and the lower conduit 2. The filling can be done by inverting the filling method. This is mainly to prevent moisture in the soil from slowly penetrating and causing corrosion, so as to achieve the function of sealing and corrosion prevention.

[0033] The alloy material layer is made of molybdenum alloy material by brazing, which has the advantages of high melting point, high temperature stability, high strength and high hardness, making it suitable for use under extreme conditions.

[0034] In the second embodiment of this utility model, the only difference is that the alloy material layer is changed to a copper-silver alloy. The copper-silver alloy has excellent electrical and thermal conductivity, good welding quality and corrosion resistance, and is suitable for high conductivity scenarios. The rest of the settings are the same as in the first embodiment.

[0035] The beneficial effects of this utility model of a lightning strike and surge protection cathodic protection insulating joint are:

[0036] 1. An annular protrusion and a disk with an alloy material layer are set in the gap to form two electrodes. The position of the disk is adjusted by the first bolt to achieve the required discharge gap, which makes the lightning protection and surge protection performance of the insulating joint good. The improved structure reduces the processing precision and manufacturing cost required by the whole structure, has good adjustability, and is maintenance-free.

[0037] 2. Setting a third insulating ring and filling the gap between it and the first insulating ring with epoxy can effectively control the height of the gap and also provide explosion-proof and corrosion-proof protection;

[0038] 3. By using suitable alloy materials to braze the raised surface of the annular protrusion and the electrode disk, the insulating joint can be adapted to different industrial application scenarios.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An insulated joint for cathodic protection against lightning strikes and surges, characterized in that, The utility model relates to a kind of electrode, including: Upper conduit and lower conduit, the lower end of upper conduit is connected with baffle ring, the upper end of lower conduit is connected with joint, first insulating ring is arranged between baffle ring and joint; Sleeve, sleeve is set in baffle ring and joint, the inner plane of sleeve lower end is arranged with second insulating ring between joint, the shoulder side of joint, first insulating ring, sleeve and second insulating ring form gap; The shoulder side of joint is provided with annular convex part, alloy material layer is arranged on the convex surface of annular convex part, forms an electrode, first bolt is arranged on sleeve, and first bolt end extends into gap and is provided with electrode disc, alloy material layer is also arranged on the disc surface of electrode disc, forms another electrode, and discharge gap between two electrodes can be adjusted by screwing first bolt during manufacturing process.

2. An insulating joint for lightning and surge protection of a cathodic protection according to claim 1, characterized in that, The surface of baffle ring and joint and first insulating ring contact is provided with sealing ring.

3. An insulating joint for lightning and surge protection of a cathodic protection system according to claim 1, characterized in that Sleeve is also provided with observation hole, for observing the discharge condition in gap, second bolt is arranged at observation hole, for plugging observation hole.

4. The lightning strike and surge protection cathodic protection insulated joint of claim 1, wherein, Alloy material layer is made of copper-silver alloy or molybdenum alloy material brazing.

5. An anti-lightning surge cathodic protection insulated joint according to any one of claims 1 to 4, characterized in that, The inner side surface of sleeve lower end is filled with epoxy between joint and lower conduit, to achieve the effect of sealing and corrosion prevention.

6. An anti-lightning surge cathodic protection insulated joint according to any one of claims 1 to 4, characterized in that, The shoulder side of joint is also provided with third insulating ring, and third insulating ring is filled with epoxy between first insulating ring, to control the height of gap while achieving the purpose of explosion-proof and corrosion-proof.

7. An insulating joint for use in a cathodic protection system, the joint being resistant to lightning strikes and surges, according to claim 6, characterised in that, Sleeve is also provided with epoxy pouring hole, for pouring epoxy resin.

8. An insulating joint for cathodic protection against lightning and surges according to claim 6, characterized in that, The inner side surface of sleeve lower end is filled with epoxy between joint and lower conduit, to achieve the effect of sealing and corrosion prevention.

Images