Detachable intelligent monitoring lightning arrester

Abstract

The application discloses a detachable intelligent monitoring lightning arrester, which comprises a lightning arrester shell, the inside of the lightning arrester shell is filled with a plurality of zinc oxide plates, the outside of the plurality of zinc oxide plates is wrapped with a plastic wrapping layer, a plurality of plug-in holes are formed in the side of the plastic wrapping layer close to the zinc oxide plates, a detection structure is plugged into the plurality of plug-in holes, and a grease injection structure is connected to the outside of the detection structure through a threaded structure, the plug-in holes are formed in the plastic wrapping layer, and the monitoring thermocouple assembly is attached to the zinc oxide plates in a plug-in mode, so that direct and distributed monitoring of the working temperature of the zinc oxide plates is realized; meanwhile, the threaded connection structure of the upper connecting section and the lower connecting section is adopted between the lightning arrester shell and the detection structure, so that the whole monitoring device can be conveniently and quickly disassembled and assembled, and the periodical maintenance and replacement of the detection elements in the operation process of the lightning arrester are facilitated, and the problems of difficult disassembly and maintenance of the existing monitoring device are solved.

Description

Technical Field

[0001] This invention relates to the field of surge arrester technology, and more specifically, to a detachable intelligent monitoring surge arrester. Background Technology

[0002] As a core device for overvoltage protection in power systems, zinc oxide surge arresters operate under long-term conditions of power frequency electric fields, wind vibration, and temperature difference cycles, making them prone to faults such as thermal aging of the varistors, internal moisture absorption, and loosening of the stack. Therefore, online monitoring of the surface temperature of the zinc oxide sheets is necessary to predict potential operational hazards. Existing intelligent monitoring surge arresters often have insertion holes in the plastic coating layer inside the arrester housing, into which thermocouple temperature sensing components are inserted to measure the temperature of the zinc oxide sheets. However, during assembly, air gaps inevitably exist between the metal temperature sensing sleeve and the inner wall of the insertion hole. The low thermal conductivity of air significantly reduces the temperature measurement response speed and accuracy. Furthermore, under the influence of high-voltage alternating electric fields, these air gaps are prone to partial discharge, continuously eroding the outer insulation layer of the zinc oxide sheets and accelerating the deterioration and failure of the surge arrester.

[0003] Currently, conventional solutions in the industry fall into two categories. The first involves manually applying thermally conductive and insulating silicone grease to the outer wall of the thermocouple before assembly. This method is prone to uneven application and localized gaps in grease. After long-term vibration, the silicone grease can be pumped out and migrate, accumulating downwards and interfering with the pressure sensor and other monitoring components at the bottom of the surge arrester. The second method involves using an external, independent grease injection fixture for secondary grease application. This method is cumbersome to assemble, and the fixture is difficult to fit into the confined internal space of the surge arrester. During outdoor maintenance, it is impossible to replenish silicone grease without disassembling the entire monitoring device. Furthermore, traditional thermocouple sheaths are solid, one-piece structures. If the silicone grease dries and solidifies at high temperatures over a long period, blocking the oil outlet channels, and there is no corresponding unblocking structure, the thermal conductivity and filling effect will be permanently lost. Therefore, a detachable intelligent monitoring surge arrester is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a detachable intelligent monitoring surge arrester to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a detachable intelligent monitoring surge arrester, comprising a surge arrester housing, wherein the interior of the surge arrester housing is filled with a plurality of zinc oxide sheets, the exterior of the plurality of zinc oxide sheets is covered with a plastic coating layer, the plastic coating layer is provided with a plurality of insertion holes on the side near the zinc oxide sheets, a detection structure is inserted into the interior of the plurality of insertion holes, and a grease injection structure is connected to the exterior of the detection structure through a threaded structure;

[0006] The detection structure is used to insert into the interior of multiple insertion holes, fit into multiple zinc oxide sheets, and monitor the working temperature of the zinc oxide sheets;

[0007] The grease injection structure is used to simultaneously inject insulating grease into the interior of the insertion hole when the detection structure is inserted into the hole, thereby filling the gap between the insertion hole and the detection structure.

[0008] Preferably, the detection structure includes a mounting housing, on which a grease injection structure is mounted. The grease injection structure has monitoring thermocouple assemblies inserted into its interior, matching the number of insertion holes. The mounting housing also has an intelligent detection circuit board and a current sensor installed inside. The intelligent detection circuit board and the current sensor are electrically connected to the multiple monitoring thermocouple assemblies via wires that pass through the outer wall of the grease injection structure.

[0009] Preferably, the grease injection structure includes a hollow rubber extrusion plug, which is movably connected to the mounting housing via a threaded structure. A storage bladder is fixedly connected to the center of the hollow rubber extrusion plug, and the storage bladder stores insulating silicone grease. Multiple delivery hoses are integrally formed on the outside of the storage bladder. Multiple rubber sheaths are integrally formed inside the hollow rubber extrusion plug. The monitoring thermocouple assembly is inserted into the inside of the rubber sheaths. A plug-in storage box is fixedly connected to the bottom wall of the inside of the rubber sheaths. The monitoring thermocouple assembly is plugged into the plug-in storage box via a through structure. A filling cavity is opened inside the monitoring thermocouple assembly, and multiple flow holes are opened on the outside of the monitoring thermocouple assembly, with the flow holes communicating with the filling cavity.

[0010] Preferably, the monitoring thermocouple assembly includes a metal insulating current-conducting sleeve, an insulating isolation sleeve, and a thermoelectric temperature-sensing inner core. The filling cavity is formed inside the metal insulating current-conducting sleeve, and the metal insulating current-conducting sleeve is inserted into the insertion hole. The thermoelectric temperature-sensing inner core is integrally formed on the side wall of the metal insulating current-conducting sleeve. An insulating isolation sleeve is connected inside the thermoelectric temperature-sensing inner core. The insulating isolation sleeve is attached to the side wall surface of the zinc oxide sheet. The power connection wires of the intelligent detection circuit board and the current sensor are electrically connected to the insulating isolation sleeve.

[0011] Preferably, an insulating inner shell is inserted inside the metal insulating flow guide sleeve, and an outlet hole matching the flow hole is opened on the outside of the insulating inner shell. The insulating inner shell is used to fit into the filling cavity of the metal insulating flow guide sleeve when injecting insulating grease, forming an inner nest, so as to avoid the insulating resin from solidifying on the inner wall of the filling cavity and thus avoid affecting the flow hole's penetration effect.

[0012] Preferably, the outer wall of the liquid outlet of the insulating inner shell is integrally formed with an insulating elastic hemisphere. The number of the insulating elastic hemispheres matches the number of the flow holes. When the insulating inner shell enters the filling cavity of the metal insulating guide sleeve, the insulating elastic hemisphere can enter the interior of multiple corresponding flow holes. On the one hand, it pushes open the silicone grease that has solidified inside the flow holes. On the other hand, after the protruding part of the insulating elastic hemisphere is cut open with a cutter, the insulating silicone grease can be transported to the outside through the cut, thus preventing the insulating silicone grease from remaining in the flow holes.

[0013] Preferably, the through structure includes a lower sealing plug cover, which is inserted into the bottom of the metal insulating flow guide sleeve. The bottom of the lower sealing plug cover is connected to two plug tubes, which are inserted into the interior of the plug storage box.

[0014] Preferably, a sealing plug is integrally formed at the center of the storage capsule, and the top of the sealing plug penetrates the outer wall of the hollow rubber extrusion plug. The sealing plug is used by the operator to refill the storage capsule with silicone grease through the sealing plug via a needle, and the sealing plug can seal the needle hole through its own elasticity after the needle is pulled out.

[0015] Preferably, the storage capsule has an integrally formed spring inside, which can drive the hollow rubber extrusion plug and the top of the storage capsule to always abut against the bottom of the plastic coating layer.

[0016] Preferably, the threaded structure includes an upper connecting section, which is fixedly connected to the bottom of the surge arrester housing. A lower connecting section is snapped onto the mounting housing via a clip. The inner wall of the lower connecting section is integrally formed with an internal thread, and the outer wall of the upper connecting section is integrally formed with an external thread. The upper connecting section is threadedly connected to the interior of the lower connecting section. The bottom of the hollow rubber extrusion plug is rotatably connected to the inner bottom wall of the lower connecting section via a rotating shaft. When the lower connecting section and the upper connecting section are threadedly connected, the top of the hollow rubber extrusion plug gradually abuts against the bottom of the plastic coating layer, thereby compressing the hollow rubber extrusion plug and the storage bladder.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In this invention, by opening insertion holes in the plastic coating layer and attaching the monitoring thermocouple assembly to the zinc oxide sheet in an insertion manner, direct and distributed monitoring of the working temperature of the zinc oxide sheet is achieved. At the same time, the arrester housing and the detection structure adopt a threaded connection structure of upper and lower connecting sections, which makes the entire monitoring device easy and quick to disassemble and install, facilitating regular maintenance and replacement of detection components during the operation of the arrester, and solving the problems of difficult disassembly and inconvenient maintenance of existing monitoring devices. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of multiple monitoring thermocouple components in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the plug hole structure in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of a three-dimensional cross-sectional structure in an embodiment of the present invention;

[0023] Figure 5 This is a partial cross-sectional view of the housing in an embodiment of the present invention;

[0024] Figure 6 This is an embodiment of the present invention. Figure 5 A magnified structural diagram of area A in the diagram;

[0025] Figure 7 This is a schematic diagram of the structure of the insulating inner shell, the metal insulating flow guide sleeve, and the lower sealing plug cover in an embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of a single insulating elastic hemisphere being cut open in an embodiment of the present invention;

[0027] Figure 9 This is a top cross-sectional view of the metal insulated flow guide sleeve in an embodiment of the present invention.

[0028] In the diagram: 100, mounting housing; 101, surge arrester housing; 102, zinc oxide sheet; 103, plastic coating layer; 104, monitoring thermocouple assembly; 1041, metal insulating current-conducting sleeve; 1042, insulating isolation sleeve; 1043, thermoelectric temperature measuring inner core; 105, plug-in hole; 106, lower connecting section; 107, intelligent detection circuit board; 108, current sensor; 109, upper connecting section; 200, hollow rubber extrusion plug; 201, rubber sleeve; 202, storage bladder; 203, plug-in storage box; 204, delivery hose; 205, flow hole; 300, insulating inner shell; 301, lower sealing plug cover; 302, plug-in pipe; 400, insulating elastic hemisphere; 500, sealing plug; 600, spring. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1, such as Figure 1 As shown, this application discloses a detachable intelligent monitoring surge arrester, including a surge arrester housing 101, the interior of which is filled with a plurality of zinc oxide sheets 102, and the exterior of the plurality of zinc oxide sheets 102 is wrapped with a plastic coating layer 103.

[0031] The plastic coating layer 103 has multiple insertion holes 105 on the side near the zinc oxide sheet 102. A detection structure is inserted into the inside of the multiple insertion holes 105, and a grease injection structure is connected to the outside of the detection structure through a threaded structure.

[0032] The detection structure is used to insert into the interior of multiple insertion holes 105 and fit onto multiple zinc oxide sheets 102 to monitor the working temperature of the zinc oxide sheets 102; the grease injection structure is used to simultaneously inject insulating grease into the interior of the insertion holes 105 when the detection structure is inserted into the interior of the insertion holes 105, thereby filling the gap between the insertion holes 105 and the detection structure with insulating grease.

[0033] Specifically, during use, the multiple zinc oxide sheets 102 inside the surge arrester housing 101 serve as the valve body of the surge arrester. They operate under long-term conditions of power frequency electric field, temperature difference cycle, and wind vibration, and are prone to failures such as thermal aging and internal moisture absorption. It is necessary to monitor their surface operating temperature online. The plastic coating layer 103 covers the outside of the zinc oxide sheets 102, providing insulation and mechanical protection for the zinc oxide sheets 102. The multiple insertion holes 105 on the plastic coating layer 103 provide insertion channels for the detection structure, allowing the detection structure to be directly inserted into the side wall of the zinc oxide sheets 102, thereby fitting the zinc oxide sheets 102 for operating temperature monitoring. The insertion method makes the installation and removal of the detection element very convenient.

[0034] like Figures 1-2 As shown, the detection structure includes a mounting housing 100, on which a grease injection structure is mounted. Inside the grease injection structure, a number of monitoring thermocouple assemblies 104 matching the number of insertion holes 105 are inserted. Inside the mounting housing 100, a smart detection circuit board 107 and a current sensor 108 are respectively installed. The smart detection circuit board 107 and the current sensor 108 are electrically connected to the multiple monitoring thermocouple assemblies 104 via wires passing through the outer wall of the grease injection structure.

[0035] Specifically, during use, the housing 100 serves as the supporting base for the detection and grease injection structures, integrating the monitoring thermocouple assembly 104, the intelligent detection circuit board 107, and the current sensor 108 into one unit. The number of monitoring thermocouple assemblies 104 matches the number of insertion holes 105, allowing each set of monitoring thermocouple assemblies 104 to be inserted into one insertion hole 105 and attached to one zinc oxide sheet 102, thus achieving distributed monitoring of the temperature of multiple zinc oxide sheets 102. The intelligent detection circuit board 107 is used to collect and process the temperature signals output by the monitoring thermocouple assemblies 104, while the current sensor 108 is used to collect the operating current flowing through the surge arrester. Through the coordinated analysis of temperature and current signals, potential operational hazards of the zinc oxide sheet 102 can be predicted more accurately. Since the monitoring thermocouple assembly 104 is inserted into the plug hole 105 by plugging, when it is necessary to repair or replace the monitoring element, the entire detection structure can be directly pulled out from the plug hole 105 without damaging the plastic coating layer 103 or the surge arrester housing 101, which greatly facilitates the disassembly and maintenance of the detection element.

[0036] like Figure 1 , Figure 8 As shown, the threaded structure includes an upper connecting section 109, which is fixedly connected to the bottom of the surge arrester housing 101. A lower connecting section 106 is snapped onto the mounting housing 100 via a clip. The inner wall of the lower connecting section 106 is integrally formed with an internal thread, and the outer wall of the upper connecting section 109 is integrally formed with an external thread. The upper connecting section 109 is threadedly connected to the inside of the lower connecting section 106. The bottom of the hollow rubber extrusion plug 200 is rotatably connected to the inner bottom wall of the lower connecting section 106 via a rotating shaft. When the lower connecting section 106 and the upper connecting section 109 are threadedly connected, the top of the hollow rubber extrusion plug 200 gradually abuts against the bottom of the plastic coating layer 103, thereby compressing the hollow rubber extrusion plug 200 and the storage bladder 202.

[0037] Specifically, during use, the surge arrester housing 101 and the detection structure are detachably connected via the threaded engagement of the upper connecting section 109 and the lower connecting section 106: the upper connecting section 109 is fixed to the bottom of the surge arrester housing 101, and the lower connecting section 106 is snapped onto the mounting housing 100. Screwing the lower connecting section 106 into the upper connecting section 109 completes the overall assembly of the surge arrester housing 101 with the detection structure and the grease injection structure. When periodic maintenance or separate disassembly of the monitoring device is required, simply unscrewing the lower connecting section 106 in the reverse direction is sufficient to detach the entire monitoring device from the surge arrester housing 101, without the need for special tools, making the operation simple and quick. The threaded connection method, compared with non-removable or difficult-to-remove structures such as snap-fit ​​and riveting, has the advantages of reliable connection, multiple disassembly cycles, and good sealing. It can ensure that the monitoring device does not loosen under operating vibration conditions, and facilitates quick disassembly and assembly during operation and maintenance, meeting the needs of regular maintenance of surge arresters. At the same time, since the detection structure is attached to the zinc oxide sheet 102 by plugging and connected to the surge arrester housing 101 by thread, the detection and disassembly of the whole machine are very convenient, significantly reducing operation and maintenance costs.

[0038] Furthermore, the bottom of the hollow rubber extrusion plug 200 is rotatably connected to the inner bottom wall of the lower connecting section 106 via a rotating shaft. When the hollow rubber extrusion plug 200 is rotatably connected to the inner bottom wall of the lower connecting section 106, and when the lower connecting section 106 and the upper connecting section 109 are connected by threads, the operator only needs to continuously rotate the hollow rubber extrusion plug 200 to connect the upper connecting section 109 and the lower connecting section 106. When the lower connecting section 106 rotates, the hollow rubber extrusion plug 200 is limited above after the monitoring thermocouple assembly 104 is inserted into the corresponding insertion hole 105. Therefore, the hollow rubber extrusion plug 200 will only rotate around itself via the rotating shaft or bearing, thereby avoiding the breakage of the monitoring thermocouple assembly 104 or the lower conductive wire and other components.

[0039] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0040] Compared with the prior art, in this embodiment, by opening a plug hole 105 on the plastic coating layer 103 and attaching the monitoring thermocouple assembly 104 to the zinc oxide sheet 102 in a plug-in manner, direct and distributed monitoring of the operating temperature of the zinc oxide sheet 102 is realized. At the same time, the arrester housing 101 and the detection structure adopt a threaded connection structure of upper connecting section 109 and lower connecting section 106, which makes the entire monitoring device easy and quick to disassemble and install, facilitates regular maintenance and replacement of detection elements during the operation of the arrester, and solves the problems of difficult disassembly and inconvenient maintenance of existing monitoring devices.

[0041] Example 2: Considering that after the monitoring thermocouple assembly 104 is inserted into the insertion hole 105, an air gap inevitably exists between the metal temperature sensing sleeve and the inner wall of the insertion hole 105, the low thermal conductivity of air will significantly reduce the temperature measurement response speed and measurement accuracy. Furthermore, the air gap is prone to partial discharge under the action of a high-voltage alternating electric field, continuously eroding the outer insulating layer of the zinc oxide sheet 102. Simultaneously, manual application of thermal grease is prone to uneven application and grease pumping out and migrating after long-term vibration. To address the above technical problems, this application proposes the following technical solution:

[0042] like Figures 1-3 As shown, the grease injection structure includes a hollow rubber extrusion plug 200, which is movably connected to the mounting housing 100 via a threaded structure. A storage bladder 202 is fixedly connected to the center of the hollow rubber extrusion plug 200. The storage bladder 202 stores insulating silicone grease. Multiple delivery hoses 204 are integrally formed on the outside of the storage bladder 202. Multiple rubber sleeves 201 are integrally formed inside the hollow rubber extrusion plug 200. The monitoring thermocouple assembly 104 is inserted into this assembly. Inside the rubber housing 201, a plug-in storage box 203 is fixedly connected to the bottom wall of the inner side of the rubber housing 201. The monitoring thermocouple assembly 104 is plugged into the plug-in storage box 203 through a through structure. A filling cavity is opened inside the monitoring thermocouple assembly 104. Multiple flow holes 205 are opened on the outside of the monitoring thermocouple assembly 104. The flow holes 205 are connected to the filling cavity. The storage bladder 202 is connected to the filling cavity of the monitoring thermocouple assembly 104 through a delivery hose 204.

[0043] Specifically, during use, as the hollow rubber extrusion plug 200 is screwed into the mounting housing 100 via the threaded structure and moves downwards, the top of the hollow rubber extrusion plug 200 gradually abuts against the bottom of the plastic coating layer 103, thereby compressing the storage capsule 202. Under pressure, the insulating silicone grease stored inside the storage capsule 202 is squeezed into the filling cavity of the monitoring thermocouple assembly 104 via multiple delivery hoses 204, and then flows out through multiple flow holes 205 on the outside of the monitoring thermocouple assembly 104, filling the gap between the inner wall of the insertion hole 105 and the monitoring thermocouple assembly 104. By filling the air gap with insulating silicone grease, on the one hand, the thermal conductivity between the zinc oxide sheet 102 and the monitoring thermocouple assembly 104 is significantly improved, enhancing the temperature response speed and measurement accuracy; on the other hand, the air gap within the insertion hole 105 is eliminated, preventing partial discharge under high-voltage alternating electric fields, protecting the outer insulation layer of the zinc oxide sheet 102 from ablation, and extending the service life of the surge arrester.

[0044] like Figures 3-4As shown, the monitoring thermocouple assembly 104 includes a metal insulating current-conducting sleeve 1041, an insulating isolation sleeve 1042, and a thermoelectric temperature-sensing inner core 1043. The filling cavity is opened inside the metal insulating current-conducting sleeve 1041, and the metal insulating current-conducting sleeve 1041 is inserted into the insertion hole 105. The thermoelectric temperature-sensing inner core 1043 is integrally formed on the side wall of the metal insulating current-conducting sleeve 1041. The insulating isolation sleeve 1042 is connected inside the thermoelectric temperature-sensing inner core 1043. The insulating isolation sleeve 1042 is attached to the side wall of the zinc oxide sheet 102. The power connection wires of the intelligent detection circuit board 107 and the current sensor 108 are electrically connected to the insulating isolation sleeve 1042.

[0045] Specifically, during use, the metal insulating current-conducting sleeve 1041 serves as the main body of the monitoring thermocouple assembly 104, undertaking both insulation and current-conducting functions, and receiving insulating silicone grease through its internal filling cavity; the thermoelectric temperature-sensing inner core 1043 is integrally formed on the side wall of the metal insulating current-conducting sleeve 1041, and can directly sense the temperature change of the zinc oxide sheet 102 and convert it into an electrical signal; the insulating isolation sleeve 1042 is attached to the side wall of the zinc oxide sheet 102, ensuring thermal contact between the thermoelectric temperature-sensing inner core 1043 and the zinc oxide sheet 102, and achieving electrical isolation to avoid interference from the monitoring line to the high-voltage part of the surge arrester; the connecting wires of the intelligent detection circuit board 107 and the current sensor 108 are electrically connected to the insulating isolation sleeve 1042, thereby stably transmitting the temperature signal to the monitoring line.

[0046] like Figure 3 , Figure 4 As shown, the through structure includes a lower sealing plug cover 301, which is inserted into the bottom of the metal insulating flow guide sleeve 1041. The bottom of the lower sealing plug cover 301 is connected to two plug tubes 302, which are inserted into the interior of the plug storage box 203.

[0047] Specifically, during use, the lower sealing plug cover 301 seals the bottom of the metal insulating guide sleeve 1041, forming a closed grease injection channel in the injection cavity; the two plug tubes 302 at its bottom are inserted into the interior of the plug storage box 203, so that the injection cavity is connected to the plug storage box 203. The insulating silicone grease enters the injection cavity through the plug storage box 203 and the plug tubes 302, and then overflows from the flow hole 205 to fill the gap; the pluggable design of the lower sealing plug cover 301 makes it easy to disassemble and clean during maintenance, ensuring the smooth flow of the grease injection channel.

[0048] Furthermore, the insulating silicone grease temporarily stored inside the delivery hose 204 and the plug-in storage box 203 will not solidify inside the delivery hose 204 because it is a certain distance from the heat source above and has a certain heat insulation and sealing effect below. Instead, it will be sealed inside the plug-in storage box 203 and the delivery hose 204 to form a certain moisture retention effect for the next delivery.

[0049] like Figure 2 , Figure 3 As shown, a sealing plug 500 is integrally formed at the center of the storage capsule 202. The top of the sealing plug 500 penetrates the outer wall of the hollow rubber extrusion plug 200. The sealing plug 500 is used by the operator to refill the silicone grease into the storage capsule 202 through the needle. After the needle is pulled out, the sealing plug 500 can seal the needle hole through its own elasticity.

[0050] Specifically, during use, when the insulating silicone grease inside the storage capsule 202 is consumed or dries up, maintenance personnel can use a syringe needle to refill the silicone grease inside the storage capsule 202 through the sealing plug 500. After refilling, the needle is pulled out, and the sealing plug 500 retracts to seal the needle hole due to its own elasticity. The silicone grease can be refilled repeatedly without replacing the entire grease filling structure. This is especially suitable for outdoor long-term maintenance scenarios where silicone grease can be replenished without disassembling the entire monitoring device. It solves the problems of cumbersome secondary glue filling process and inability to refill online in traditional external tooling.

[0051] like Figure 2 , Figure 3 As shown, a spring 600 is integrally formed inside the storage capsule 202. The spring 600 can drive the hollow rubber extrusion plug 200 and the top of the storage capsule 202 to always abut against the bottom of the plastic coating layer 103.

[0052] Specifically, during use, the spring 600 provides a continuous preload to the storage bladder 202, ensuring that the top of the hollow rubber extrusion plug 200 and the storage bladder 202 always abuts against the bottom of the plastic coating layer 103 after assembly. This ensures that the grease injection structure can maintain a stable extrusion state even under the vibration conditions of the surge arrester, preventing loosening of the extrusion due to vibration, backflow of silicone grease, or insufficient filling, thereby ensuring the continuous filling effect of the insulating silicone grease on the gaps.

[0053] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0054] Compared to Embodiment 1, in this embodiment, the insulating silicone grease is automatically filled into the gap between the inner wall of the insertion hole 105 and the monitoring thermocouple assembly 104 by squeezing the storage bladder 202 through the delivery hose 204, the filling cavity and the flow hole 205. This solves the problems of uneven application of silicone grease by manual application, migration due to long-term vibration pumping, and low temperature measurement accuracy and partial discharge caused by air gaps. At the same time, the sealing plug 500 enables online repeated filling of silicone grease, and the spring 600 ensures the continuous stability of the squeezed state, thus improving the overall thermal conductivity, insulation reliability and maintainability of the monitoring device.

[0055] Example 3: Considering that after long-term high-temperature operation, the insulating silicone grease may dry out and solidify, clogging the flow hole 205 of the monitoring thermocouple assembly 104 and the filling cavity of the metal insulating flow guide sleeve 1041, once the grease outlet channel is blocked, the thermal conductivity filling effect will be permanently lost. Furthermore, traditional solid integrated flow guide sleeves lack a matching unblocking structure. To address the above technical problems, this application proposes the following technical solution to solve them:

[0056] like Figures 3-5 As shown, an insulating inner shell 300 is inserted into the inside of the metal insulating flow guide sleeve 1041. The outer side of the insulating inner shell 300 has a liquid outlet hole that matches the flow hole 205. The insulating inner shell 300 is used to fit into the filling cavity of the metal insulating flow guide sleeve 1041 when injecting insulating grease, forming an inner nest, so as to avoid the insulating resin from solidifying on the inner wall of the filling cavity and thus avoid affecting the penetration effect of the flow hole 205.

[0057] Specifically, during use, the insulating inner shell 300 is detachably fitted inside the filling cavity of the metal insulating flow guide sleeve 1041, forming an inner nested structure. When injecting insulating silicone grease, the silicone grease is confined to the interlayer between the insulating inner shell 300 and the metal insulating flow guide sleeve 1041 and flows out through the outlet hole and the flow hole 205. Since the insulating inner shell 300 can be removed as a whole, when the silicone grease solidifies in the interlayer, the insulating inner shell 300 can be pulled out from the metal insulating flow guide sleeve 1041 as a whole, avoiding the solidified silicone grease from directly adhering to and solidifying on the inner wall of the filling cavity of the metal insulating flow guide sleeve 1041, thereby protecting the connection between the filling cavity and the flow hole 205, and facilitating cleaning and reuse.

[0058] like Figure 5 As shown, the outer wall of the liquid outlet of the insulating inner shell 300 is integrally formed with an insulating elastic hemisphere 400, and the number of insulating elastic hemispheres 400 matches the number of flow holes 205.

[0059] Specifically, during use, when the insulating inner shell 300 is inserted into the metal insulating guide sleeve 1041, the integrally formed insulating elastic hemisphere 400 on the outer wall of its liquid outlet hole extends into each flow hole 205; when there is already condensed silicone grease in the flow hole 205, the elastic insulating elastic hemisphere 400 can push it open and restore the flow hole 205 to its original state.

[0060] During maintenance and unblocking, a cutter can be used to cut the protruding part of the insulating elastic hemisphere 400 that extends into the flow hole 205 along its root, so that the insulating elastic hemisphere 400 forms a through cut channel. The insulating silicone grease can then be delivered to the outside of the flow hole 205 through this cut to fill the gap. The cut-off part of the insulating elastic hemisphere 400 remains at the outlet position and does not affect subsequent grease injection. The separable and cutable insulating inner shell 300 and insulating elastic hemisphere 400 structure allows the grease outlet channel to be restored by physical opening and cutting even if the silicone grease dries out and becomes blocked. This solves the problem of traditional guide sleeves being unable to be unblocked and permanently failing after blockage.

[0061] Furthermore, the insulating inner shell 300 is a low-cost, disposable or reusable insulating inner shell 300. When using the insulating inner shell 300, on the one hand, the insulating inner shell 300 can be quickly replaced to avoid the silicone grease from clogging the inside of the thermocouple assembly 104. On the other hand, when the insulating inner shell 300 is directly replaced, damage to the insulating isolation sleeve 1042 or thermoelectric temperature measuring inner core 1043 can be avoided when the staff cleans the silicone grease inside the thermocouple assembly 104.

[0062] Furthermore, both the insulating inner shell 300 and the insulating elastic hemisphere 400 are made of insulating materials, which can maintain electrical isolation between the metal insulating current-conducting sleeve 1041 and the zinc oxide sheet 102 after being cut, and will not introduce the risk of discharge or short circuit. In addition, the insulating inner shell 300 can be removed and replaced as a whole. Combined with the cutting and restoration of the insulating elastic hemisphere 400, the monitoring device can maintain stable thermal conductivity and temperature monitoring performance after long-term use.

[0063] The technical solutions described in the embodiments of this application above have at least the following technical effects or advantages:

[0064] Compared to Embodiment 2, in this embodiment, a separable insulating inner shell 300 is provided inside the metal insulating flow guide sleeve 1041 to form an inner nest, and an insulating elastic hemisphere 400 is provided on the outer wall of its liquid outlet hole, which can enter the flow hole 205, push open the solidified silicone grease, and can be cut by a cutter. This allows the grease injection channel to be restored to continuity by physically pushing open and cutting when the silicone grease dries and becomes blocked. The insulating inner shell 300 can also be completely extracted to prevent the silicone grease from solidifying on the inner wall of the injection cavity. This avoids the problem of traditional flow guide sleeves being unable to be cleared after blockage and permanently losing their thermal conductivity and filling effect, thus improving the reliability and maintainability of the monitoring device during long-term operation.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A detachable intelligent monitoring surge arrester, comprising a surge arrester housing (101), wherein the interior of the surge arrester housing (101) is filled with a plurality of zinc oxide sheets (102), and the exterior of the plurality of zinc oxide sheets (102) is covered with a plastic coating layer (103), characterized in that: The plastic coating layer (103) has multiple insertion holes (105) on the side near the zinc oxide sheet (102). A detection structure is inserted into the interior of the multiple insertion holes (105), and a grease injection structure is connected to the exterior of the detection structure through a threaded structure. The detection structure is used to insert into the interior of multiple insertion holes (105), fit with multiple zinc oxide sheets (102), and monitor the working temperature of the zinc oxide sheets (102); The grease injection structure is used to simultaneously inject insulating grease into the interior of the insertion hole (105) when the detection structure is inserted into the interior of the insertion hole (105), thereby filling the gap between the insertion hole (105) and the detection structure with insulating grease.

2. The detachable intelligent monitoring surge arrester according to claim 1, characterized in that: The detection structure includes a mounting housing (100), on which a grease injection structure is mounted. The grease injection structure has a number of monitoring thermocouple assemblies (104) that match the number of the insertion holes (105) inserted inside. The mounting housing (100) has a smart detection circuit board (107) and a current sensor (108) installed inside. The smart detection circuit board (107) and the current sensor (108) are electrically connected to the multiple monitoring thermocouple assemblies (104) by wires passing through the outer wall of the grease injection structure.

3. A detachable intelligent monitoring surge arrester according to claim 2, characterized in that: The grease injection structure includes a hollow rubber extrusion plug (200), which is movably connected to the mounting housing (100) via a threaded structure. A storage bladder (202) is fixedly connected to the center of the hollow rubber extrusion plug (200). The storage bladder (202) stores insulating silicone grease. Multiple delivery hoses (204) are integrally formed on the outside of the storage bladder (202). Multiple rubber sleeves (201) are integrally formed inside the hollow rubber extrusion plug (200). The monitoring thermocouple assembly (104) is inserted into the inside of the rubber shell (201). The bottom wall of the rubber shell (201) is fixedly connected to the insertion storage box (203). The monitoring thermocouple assembly (104) is inserted into the insertion storage box (203) through a through structure. The monitoring thermocouple assembly (104) has a filling cavity inside. The monitoring thermocouple assembly (104) has multiple flow holes (205) on the outside. The flow holes (205) are connected to the filling cavity.

4. A detachable intelligent monitoring surge arrester according to claim 3, characterized in that: The monitoring thermocouple assembly (104) includes a metal insulating flow guide sleeve (1041), an insulating isolation sleeve (1042), and a thermoelectric temperature measuring core (1043). The filling cavity is opened inside the metal insulating flow guide sleeve (1041). The metal insulating flow guide sleeve (1041) is inserted into the insertion hole (105). The thermoelectric temperature measuring core (1043) is integrally formed on the side wall of the metal insulating flow guide sleeve (1041). The insulating isolation sleeve (1042) is connected inside the thermoelectric temperature measuring core (1043). The insulating isolation sleeve (1042) is attached to the side wall of the zinc oxide sheet (102). The power connection wires of the intelligent detection circuit board (107) and the current sensor (108) are electrically connected to the insulating isolation sleeve (1042).

5. A detachable intelligent monitoring surge arrester according to claim 4, characterized in that: An insulating inner shell (300) is inserted inside the metal insulating flow guide sleeve (1041). The outer side of the insulating inner shell (300) is provided with a liquid outlet hole that matches the flow hole (205). The insulating inner shell (300) is used to fit into the filling cavity of the metal insulating flow guide sleeve (1041) when injecting insulating grease, forming an inner nest, so as to avoid the insulating resin from solidifying on the inner wall of the filling cavity and avoid affecting the penetration effect of the flow hole (205).

6. A detachable intelligent monitoring surge arrester according to claim 5, characterized in that: The outer wall of the liquid outlet of the insulating inner shell (300) is integrally formed with an insulating elastic hemisphere (400). The number of the insulating elastic hemispheres (400) matches the number of the flow holes (205). When the insulating inner shell (300) enters the filling cavity of the metal insulating guide sleeve (1041), the insulating elastic hemispheres (400) can enter the interior of multiple corresponding flow holes (205). On the one hand, they push open the silicone grease that has solidified inside the flow holes (205). On the other hand, after the protruding part of the insulating elastic hemispheres (400) is cut open with a cutter, the insulating silicone grease can be transported to the outside through the cut, avoiding the insulating silicone grease from remaining in the flow holes (205).

7. A detachable intelligent monitoring surge arrester according to claim 6, characterized in that: The through structure includes a lower sealing plug cover (301), which is inserted into the bottom of the metal insulating flow guide sleeve (1041). The bottom of the lower sealing plug cover (301) is connected to two plug tubes (302), which are inserted into the interior of the plug storage box (203).

8. A detachable intelligent monitoring surge arrester according to claim 3, characterized in that: A sealing plug (500) is integrally formed at the center of the storage capsule (202). The top of the sealing plug (500) penetrates the outer wall of the hollow rubber extrusion plug (200). The sealing plug (500) is used by the operator to refill the storage capsule (202) with silicone grease through the sealing plug (500) via a needle. After the needle is removed, the sealing plug (500) can seal the needle hole through its own elasticity.

9. A detachable intelligent monitoring surge arrester according to claim 8, characterized in that: The storage capsule (202) has an integrally formed spring (600) inside, which can drive the top of the hollow rubber extrusion plug (200) and the storage capsule (202) to always abut against the bottom of the plastic coating layer (103).

10. A detachable intelligent monitoring surge arrester according to claim 8, characterized in that: The threaded structure includes an upper connecting section (109), which is fixedly connected to the bottom of the surge arrester housing (101). A lower connecting section (106) is snapped onto the mounting housing (100). The inner wall of the lower connecting section (106) is integrally formed with an internal thread, and the outer wall of the upper connecting section (109) is integrally formed with an external thread. The upper connecting section (109) is threadedly connected to the inside of the lower connecting section (106). The bottom of the hollow rubber extrusion plug (200) is rotatably connected to the inner bottom wall of the lower connecting section (106) via a rotating shaft. When the lower connecting section (106) and the upper connecting section (109) are threadedly connected, the top of the hollow rubber extrusion plug (200) gradually abuts against the bottom of the plastic coating layer (103), thereby extruding the hollow rubber extrusion plug (200) and the storage bladder (202).

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