Protective device for monitoring electric leakage of metal zinc oxide arrester

Abstract

The utility model discloses a protective device for monitoring electric leakage of a metal zinc oxide lightning arrester, which relates to the technical field of lightning arresters and comprises a lightning arrester body and a monitoring instrument. A wire is fixedly installed at the top of the monitoring instrument, an installation part is fixedly installed on the periphery of the bottom of the lightning arrester body, one side of the wire extends into the installation part and makes contact with the lightning arrester body, a protective cover is fixedly installed on the periphery of the wire, and one side of the protective cover is attached to the surface of the installation part. According to the utility model, after the lead is installed and fixed, the sealing frame III and the bulge II as well as the bulge III can be tightly attached to the inner wall of the installation piece, so that the contact area between the protective cover and the installation piece is increased; and further sealing treatment can be performed on the mounting piece and the protective cover from the periphery, so that the sealing effect of the wire is improved, and normal operation of electric leakage monitoring work is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning arresters, in particular to a protective device for monitoring leakage of a metal zinc oxide lightning arrester. Background Art

[0002] Metal zinc oxide lightning arrester is an important device used to protect power systems and electrical equipment from overvoltage damage. It uses the good nonlinear volt-ampere characteristics of zinc oxide resistors to work. In order to promptly detect insulation defects and aging problems of lightning arresters, lightning arrester leakage monitoring equipment is required to monitor the lightning arrester for leakage and prevent power accidents caused by lightning arrester failures.

[0003] During the long-term use of lightning arresters, they are inevitably corroded or damaged by the external environment, resulting in reduced performance of the lightning arrester and subsequent leakage current of the lightning arrester. At the same time, since the power supply department conducts regular inspections on the lightning arresters, it is only through preventive tests during the inspection that we can know whether the lightning arrester is intact. The lightning arrester cannot be monitored in real time, which brings great safety hazards to the power system.

[0004] In the prior art, a Chinese patent with publication number CN221199903U is proposed to solve the above-mentioned technical problems. The technical solution disclosed in the patent document is as follows: a lightning arrester leakage current monitoring and alarm device, which relates to the technical field of lightning arresters, comprises a lightning arrester and a monitoring box, wherein the monitoring box is installed on a high-voltage line tower, and a current monitoring meter is installed inside the monitoring box, and a plurality of wire probes are installed at one end of the current monitoring meter, and each wire probe is installed inside the lightning arrester. In the utility model, each conductor probe is inserted into the inside of the installation hole respectively, so that the conductor probe and the core body of the lightning arrester are first fitted together, so as to cooperate with the current monitoring meter to monitor the lightning arrester in real time. Then, when the current monitoring meter cooperates with the conductor probe to detect that the lightning arrester has leakage, the processor will control the alarm to sound an alarm in the first time, prompting nearby pedestrians to stay away from the power tower, and then transmit the data to the inside of the control terminal through the signal transmitter to alarm the power supply department, so that the power supply department can quickly locate the lightning arrester that needs to be replaced according to the transmitted data. However, the above scheme uses a sealing block to seal the conductor probe, and its sealing method is relatively single, which makes the overall sealing performance insufficient, and thus easily affects the leakage monitoring effect. Utility Model Content

[0005] The purpose of the utility model is to provide a protective device for leakage monitoring of metal zinc oxide lightning arresters, so as to solve the problem that the prior art proposed in the background technology uses a sealing block to seal the wire probe, and its sealing method is relatively single, resulting in insufficient overall sealing performance, which is easy to affect the leakage monitoring effect.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A protective device for monitoring leakage of a metal zinc oxide lightning arrester, comprising a lightning arrester body and a monitoring instrument; a conductor is fixedly installed on the top of the monitoring instrument, a mounting piece is fixedly installed on the periphery of the bottom of the lightning arrester body, one side of the conductor extends to the inside of the mounting piece and contacts the lightning arrester body, a protective cover is fixedly installed on the periphery of the conductor, one side of the protective cover is in contact with the surface of the mounting piece, plug blocks are fixedly installed on the other side of the mounting piece at both ends of the conductor, each plug block is mutually engaged with the inside of the protective cover, a card block is installed inside each plug block through a spring sliding, and the outer end of each card block is respectively A pressure block is slidably installed inside the protective cover at the outer end of each plug-in block, and the inner end surface of each pressure block is respectively fitted with the surface of each card block. A connecting rod is fixedly installed on the surface of the outer end of each pressure block, and the outer end surface of each connecting rod extends out of the interior of the protective cover and is fixedly connected with a pressure plate. A sealing frame three is attached to one side of the protective cover outside each plug-in block, and the sealing frame three is tightly fitted with the inner wall of the mounting piece. A protrusion three is provided on one side surface of the sealing frame three, and a protrusion two is provided on one side surface of the sealing frame three outside the protrusion three, and the protrusion three and the protrusion two are both tightly fitted with the inner wall of the mounting piece.

[0008] The prior art proposed in the background technology uses a sealing block to seal the conductor probe, and its sealing method is relatively single, which makes the overall sealing performance insufficient, and thus easily affects the leakage monitoring effect. In the present application, after the protective cover is fitted with the mounting piece, the plug block can be inserted into the interior of the protective cover, and the spring and the card block are installed. The elastic force of the spring itself can form a thrust toward the outer end of the card block, and then the card block is squeezed into the interior of the protective cover, so that the protective cover cannot move to the other side, thereby realizing the connection and fixation between the conductor and the lightning arrester body, and when the protective cover and the mounting piece are fitted, the sealing frame three can fit tightly with the inner wall of the mounting piece, and by installing protrusions two and three, the surface of one side of the sealing frame three is set to an uneven structure, wherein the materials of the sealing frame three, protrusions two and three are all made of rubber material, compared with the plane, the contact area between the sealing frame three and the inner wall of the mounting piece is increased, and the sealing effect is further improved.

[0009] A further improvement of the technical solution of the utility model is that an adjustment frame is slidably installed on the periphery of the protective cover on one side of each pressure plate, a fixed frame is fixedly connected to one side of the adjustment frame, a sealing frame is attached to the inside of the fixed frame, and the inner wall of the sealing frame is tightly fitted with the surface of the protective cover and the mounting part.

[0010] The above technical solution is adopted. In this solution, after the mounting piece is connected to the protective cover, water vapor or impurities may penetrate into the surface of the wire from the contact surface of their outermost surfaces. In the present application, a fixing frame and a sealing frame are installed, wherein the inner wall of the sealing frame is kept in a tightly fitted state with both the mounting piece and the protective cover, so that the contact surface of their outermost surfaces can be shielded and sealed.

[0011] A further improvement of the technical solution of the utility model is that: a slope is provided on the surface of the other side of the adjustment frame, and a surface on one side of each protective cover is pressed against the slope.

[0012] The above-mentioned technical solution is adopted. In this solution, by opening a slope on the surface of the adjustment frame, when the card block enters the interior of the protective cover, the card block will squeeze the pressure block, and at the same time drive the connecting rod and the pressure plate to move toward the outer end. At the same time, the pressure plate can squeeze the slope of the adjustment frame, so that the adjustment frame moves to one side, and then moves the sealing frame 1 so that it fits tightly with the surface of the mounting part, reducing the possibility of the sealing frame 1 detaching from the surface of the mounting part, and improving the use effect of the sealing frame 1.

[0013] A further improvement of the technical solution of the utility model is that: a protrusion one is arranged inside the sealing frame one, a sealing frame two is embedded on the outer surface of the mounting piece, the protrusion one is tightly fitted with the inner wall of the sealing frame one, and a groove matching the shape of the protrusion one is arranged on the outer surface of the protective cover inside the sealing frame one.

[0014] The above technical solution is adopted. In this solution, by installing protrusion one and sealing frame two, protrusion one is inserted into the interior of sealing frame two, and they are squeezed against each other, wherein the sealing frame one, protrusion one and sealing frame two are all made of rubber material, thereby further reducing the gap between sealing frame one and the surface of the mounting piece, so that the mounting piece and the protective cover can be further sealed from the outside, thereby improving the sealing effect of the wire and ensuring the normal operation of leakage monitoring.

[0015] A further improvement of the technical solution of the utility model is that a plurality of sliders are provided inside the adjustment frame on the other side of the sealing frame, and a plurality of slide grooves matching the shape of each slider are provided on the surfaces of both ends of the protective cover, and each slider is slidably connected to the inside of each slide groove.

[0016] The above technical solution is adopted. In this solution, the sliding trajectory of the adjustment frame on the periphery of the protective cover can be guided and limited by installing a slider, preventing the adjustment frame from moving toward the two ends or the top and bottom on the periphery of the protective cover and affecting the use effect of the sealing frame.

[0017] A further improvement of the technical solution of the utility model is that: the outer end surface of each clamping block is provided with an inclined surface inclined toward the inner end of the other side, and the inner end of each inclined surface extends to the inside of each plug block respectively.

[0018] The above technical solution is adopted. In this solution, by providing a bevel on the surface of the card block, when the plug block is inserted into the interior of the protective cover, the bevel of the card block first contacts the surface of the protective cover, and the protective cover can squeeze the bevel, so that the card block moves toward the interior of the card block, and there is no need for the operator to actively push the card block, thereby reducing the operating steps and facilitating the insertion of the plug block into the interior of the protective cover.

[0019] A further improvement of the technical solution of the utility model is that an oblique groove is provided on one side surface of the protective cover around each plug block.

[0020] The above technical solution is adopted. In this solution, an oblique groove is provided on the surface of the protective cover, thereby enlarging the opening size corresponding to the plug block on one side of the protective cover, making it easier for the plug block to be aligned and inserted into the interior of the protective cover, thereby improving the installation efficiency of the wires.

[0021] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0022] 1. The utility model provides a protective device for monitoring leakage of a metal zinc oxide lightning arrester. When the protective cover is fitted with the mounting piece, the sealing frame three can be tightly fitted with the inner wall of the mounting piece, and by setting the protrusions two and three, the surface of one side of the sealing frame three is set to an uneven structure. Compared with setting the surface of one side of the sealing frame three to a plane, the contact area between the sealing frame three and the inner wall of the mounting piece can be increased, thereby further improving the sealing effect.

[0023] 2. The utility model provides a protective device for leakage monitoring of metal zinc oxide lightning arresters. By moving the inner wall of the sealing frame to a state of close fit between the mounting piece and the protective cover, the contact surface between the mounting piece and the outer surface of the protective cover can be shielded and sealed, and by providing an inclined surface on the surface of the adjustment frame, when the clamping block squeezes the pressing block, the connecting rod and the pressure plate move toward the outer end. At this time, the pressure plate can squeeze the inclined surface of the adjusting frame to move it to one side, thereby moving the sealing frame to a state of close fit with the surface of the mounting piece, thereby reducing the possibility of the sealing frame 1 detaching from the surface of the mounting piece and improving the use effect of the sealing frame 1.

[0024] 3. The utility model provides a protective device for leakage monitoring of metal zinc oxide lightning arresters. By installing a protrusion one and a sealing frame two, after the sealing frame one is moved, the protrusion one can be inserted into the interior of the sealing frame two, and they can squeeze each other, thereby further sealing the mounting piece and the protective cover from the outside, further reducing the gap between the sealing frame one and the surface of the mounting piece, improving the sealing effect of the wire, and ensuring the normal leakage monitoring work. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a three-dimensional diagram of the utility model;

[0027] Figure 2 It is a schematic diagram of the partial structure of the protective cover of the utility model;

[0028] Figure 3 It is a schematic diagram of the partial structure of the cross section of the mounting part of the utility model;

[0029] Figure 4 It is a schematic diagram of the partial structure of the second cross-section of the fixing frame of the utility model;

[0030] Figure 5 It is a schematic diagram of the partial structure of the cross section of the protective cover of the utility model;

[0031] Figure 6 It is a schematic diagram of the local structure of the adjustment frame of the utility model;

[0032] Figure 7 For the utility model Figure 3 Enlarged structural diagram at A in the middle.

[0033] In the figure: 1. Lightning arrester body; 2. Monitoring instrument; 3. Wire; 4. Mounting piece; 5. Protective cover; 6. Pressure plate; 7. Fixed frame; 8. Adjustment frame; 9. Insert block; 10. Spring; 11. Block; 12. Pressure block; 13. Connecting rod; 14. Sealing frame 1; 15. Protrusion 1; 16. Sealing frame 2; 17. Slider; 18. Sealing frame 3; 19. Protrusion 2; 20. Protrusion 3; 21. Bevel groove; 22. Groove. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the embodiments:

[0035] Example 1

[0036] like Figure 1 , Figure 3 and Figure 5As shown, the utility model provides a protective device for monitoring leakage of a metal zinc oxide lightning arrester, comprising a lightning arrester body 1 and a monitoring instrument 2; a conductor 3 is fixedly installed on the top of the monitoring instrument 2, a mounting member 4 is fixedly installed on the periphery of the bottom of the lightning arrester body 1, one side of the conductor 3 extends to the inside of the mounting member 4 and contacts with the lightning arrester body 1, a protective cover 5 is fixedly installed on the periphery of the conductor 3, one side of the protective cover 5 is in contact with the surface of the mounting member 4, plug blocks 9 are fixedly installed on the other side of the mounting member 4 at both ends of the conductor 3, each plug block 9 is mutually engaged with the inside of the protective cover 5, and a card block 11 is slidably installed on the inside of each plug block 9 through a spring 10, and the outer end of each card block 11 extends respectively Out of the interior of each plug block 9, a pressure block 12 is slidably installed inside the protective cover 5 at the outer end of each plug block 9, the inner end surface of each pressure block 12 is respectively fitted with the surface of each card block 11, and a connecting rod 13 is fixedly installed on the surface of the outer end of each pressure block 12. The outer end surface of each connecting rod 13 extends out of the interior of the protective cover 5 and is fixedly connected with a pressure plate 6. A sealing frame three 18 is attached to one side of the protective cover 5 outside each plug block 9. The sealing frame three 18 is tightly fitted with the inner wall of the mounting member 4. A protrusion three 20 is provided on the surface of one side of the sealing frame three 18. A protrusion two 19 is provided on the surface of one side of the sealing frame three 18 outside the protrusion three 20. The protrusion three 20 and the protrusion two 19 are both tightly fitted with the inner wall of the mounting member 4.

[0037] In this embodiment, the prior art proposed in the background technology uses a sealing block to seal the wire probe, and its sealing method is relatively simple, which makes the overall sealing performance insufficient, and thus easily affects the leakage monitoring effect. In this application, after the protective cover 5 is fitted with the mounting member 4, the plug 9 can be inserted into the interior of the protective cover 5, and the spring 10 and the clamping block 11 are installed. The elastic force of the spring 10 itself can form a thrust to the outer end of the clamping block 11, and then the clamping block 11 is squeezed into the interior of the protective cover 5, so that the protective cover 5 cannot be moved to the outside. The other side moves, thereby realizing the connection and fixation between the wire 3 and the lightning arrester body 1, and when the protective cover 5 and the mounting part 4 are fitted together, the sealing frame three 18 can be tightly fitted with the inner wall of the mounting part 4, and by installing the protrusions two 19 and the protrusions three 20, the surface of one side of the sealing frame three 18 is set to an uneven structure, wherein the sealing frame three 18, the protrusions two 19 and the protrusions three 20 are all made of rubber material, compared with the plane, the contact area between the sealing frame three 18 and the inner wall of the mounting part 4 is increased, and the sealing effect is further improved.

[0038] Example 2

[0039] like Figure 3 , Figure 4 and Figure 7As shown, on the basis of Example 1, the utility model provides a technical solution: preferably, an adjusting frame 8 is slidably installed on the periphery of the protective cover 5 on one side of each pressure plate 6, a fixed frame 7 is fixedly connected to one side of the adjusting frame 8, a sealing frame 14 is attached to the inside of the fixed frame 7, the inner wall of the sealing frame 14 is tightly fitted with the surfaces of the protective cover 5 and the mounting member 4, the surface on the other side of the adjusting frame 8 is provided with an inclined surface, and the surface of one side of each protective cover 5 is squeezed against the inclined surface, a protrusion 15 is provided inside the sealing frame 14, and a sealing frame 2 16 is embedded on the outer surface of the mounting member 4, the protrusion 15 is tightly fitted with the inner wall of the sealing frame 14, the outer surface of the protective cover 5 inside the sealing frame 14 is provided with a groove 22 matching the shape of the protrusion 15, a plurality of sliders 17 are provided inside the adjusting frame 8 on the other side of the sealing frame 14, a plurality of slides 17 are provided on the two end surfaces of the protective cover 5, and each slide 17 is slidably connected to the inside of each slide groove.

[0040] In the present embodiment, after the mounting member 4 is connected to the protective cover 5, water vapor or impurities may penetrate into the surface of the wire 3 from the contact surface of their outermost surfaces. In the present application, by installing a fixing frame 7 and a sealing frame 14, wherein the inner wall of the sealing frame 14 is kept in close contact with the mounting member 4 and the protective cover 5, the contact surface of their outermost surfaces can be shielded and sealed; by providing an inclined surface on the surface of the adjusting frame 8, when the block 11 enters the interior of the protective cover 5, the block 11 will squeeze the pressing block 12, and at the same time drive the connecting rod 13 and the pressing plate 6 to move toward the outer end, and at the same time the pressing plate 6 can squeeze the inclined surface of the adjusting frame 8, so that the adjusting frame 8 moves to one side, and then moves the sealing frame 14 to make it closely fit with the surface of the mounting member 4, thereby reducing the sealing frame 14 and the surface of the mounting member 4. The possibility of detachment is improved, and the use effect of the sealing frame 14 is improved; and by installing the protrusion 15 and the sealing frame 16, by inserting the protrusion 15 into the interior of the sealing frame 16, and they are squeezed against each other, wherein the sealing frame 14, the protrusion 15 and the sealing frame 16 are all made of rubber material, which further reduces the gap between the sealing frame 14 and the surface of the mounting member 4, so that the mounting member 4 and the protective cover 5 can be further sealed from the outside, thereby improving the sealing effect of the wire 3 and ensuring the normal operation of the leakage monitoring work; by installing the slider 17, the sliding trajectory of the adjusting frame 8 on the outside of the protective cover 5 can be guided and limited, preventing the adjusting frame 8 from moving to the two ends or the top and bottom on the outside of the protective cover 5 and affecting the use effect of the sealing frame 14.

[0041] Example 3

[0042] like Figure 3 , Figure 4 and Figure 5As shown, based on Example 2, the utility model provides a technical solution: preferably, the outer end surface of each block 11 is provided with an inclined surface inclined toward the inner end of the other side, the inner end of each inclined surface extends to the interior of each plug block 9 respectively, and the one side surface of the protective cover 5 outside each plug block 9 is provided with an inclined groove 21.

[0043] In this embodiment, by providing an inclined surface on the surface of the card block 11, when the plug block 9 is inserted into the protective cover 5, the inclined surface of the card block 11 first contacts the surface of the protective cover 5, and the protective cover 5 can squeeze the inclined surface, so that the card block 11 moves toward the inside of the plug block 9, and there is no need for the operator to actively push the card block 11, thereby reducing the operating steps and facilitating the insertion of the plug block 9 into the protective cover 5; by providing an inclined groove 21 on the surface of the protective cover 5, the size of the opening corresponding to the plug block 9 on one side of the protective cover 5 is enlarged, which facilitates the alignment and insertion of the plug block 9 into the protective cover 5, thereby improving the installation efficiency of the wire 3.

[0044] The working principle of the protective device for monitoring leakage of metal zinc oxide lightning arresters is described in detail below.

[0045] like Figure 1-Figure 7 As shown, the operator extends the wire 3 into the interior of the mounting member 4 and snaps the protective cover 5 to the periphery of the plug-in block 9. During the movement, the inclined surface of the block 11 contacts the protective cover 5, and then the spring 10 can be retracted into the interior of the plug-in block 9. Finally, the plug-in block 9 is completely snapped into the interior of the protective cover 5. At this time, the spring 10 is used to squeeze the block 11 so that the block 11 is snapped into the interior of the protective cover 5. The sealing frame 3 18, the protrusion 2 19 and the protrusion 3 20 are tightly fitted to the surface of the mounting member 4, which to a certain extent fixes the contact surface of the mounting member 4 and the protective cover 5. The sealing treatment is carried out, and the clamping block 11 can squeeze the pressing block 12, and at the same time drive the connecting rod 13 and the pressing plate 6 to move toward the outer end. At this time, the pressing plate 6 can squeeze the inclined surface of the adjusting frame 8, so that the adjusting frame 8 and the fixed frame 7 move to one side, so that the protrusion 15 is inserted into the inside of the sealing frame 2 16, and the sealing frame 14 is tightly fitted with the sealing frame 2 16 and the surface of the mounting member 4 and the protective cover 5, and the edge position of the mounting member 4 and the protective cover 5 is sealed, so as to facilitate the use of the wire 3 and the monitoring instrument 2 to monitor the leakage of the lightning arrester body 1.

[0046] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A protective device for monitoring leakage of a metal zinc oxide lightning arrester, comprising a lightning arrester body (1) and a monitoring instrument (2); characterized in that: A conductor (3) is fixedly mounted on the top of the monitoring instrument (2); a mounting member (4) is fixedly mounted on the periphery of the bottom of the arrester body (1); one side of the conductor (3) extends to the interior of the mounting member (4) and contacts the arrester body (1); a protective cover (5) is fixedly mounted on the periphery of the conductor (3); one side of the protective cover (5) is in contact with the surface of the mounting member (4); plug-ins (9) are fixedly mounted on the other side of the mounting member (4) at both ends of the conductor (3); each plug-in block (9) is engaged with the interior of the protective cover (5); a clamping block (11) is slidably mounted on the interior of each plug-in block (9) via a spring (10); the outer end of each clamping block (11) extends out of the interior of each plug-in block (9); the protective cover at the outer end of each plug-in block (9) (5) are all slidably mounted with a pressure block (12) inside, the inner end surface of each pressure block (12) is respectively fitted with the surface of each clamping block (11), the outer end surface of each pressure block (12) is fixedly mounted with a connecting rod (13), the outer end surface of each connecting rod (13) extends out of the interior of the protective cover (5) and is fixedly connected with a pressure plate (6), a sealing frame three (18) is attached to one side of the protective cover (5) outside each plug block (9), the sealing frame three (18) is tightly fitted with the inner wall of the mounting member (4), a protrusion three (20) is provided on one side surface of the sealing frame three (18), a protrusion two (19) is provided on one side surface of the sealing frame three (18) outside the protrusion three (20), and the protrusion three (20) and the protrusion two (19) are both tightly fitted with the inner wall of the mounting member (4).

2. A protective device for monitoring leakage of a metal zinc oxide lightning arrester according to claim 1, characterized in that: An adjustment frame (8) is slidably mounted on the periphery of the protective cover (5) on one side of each pressure plate (6); a fixed frame (7) is fixedly connected to one side of the adjustment frame (8); a sealing frame (14) is attached to the interior of the fixed frame (7); the inner wall of the sealing frame (14) is tightly fitted to the surfaces of the protective cover (5) and the mounting member (4).

3. A protective device for monitoring leakage of a metal zinc oxide lightning arrester according to claim 2, characterized in that: The surface of the other side of the adjustment frame (8) is provided with an inclined surface, and the surface of one side of each of the protective covers (5) is pressed against the inclined surface.

4. A protective device for monitoring leakage of a metal zinc oxide lightning arrester according to claim 3, characterized in that: The sealing frame (14) is provided with a protrusion (15) inside, and the outer surface of the mounting member (4) is provided with a sealing frame (16) in an inlaid manner, the protrusion (15) is tightly fitted with the inner wall of the sealing frame (14), and the outer surface of the protective cover (5) inside the sealing frame (14) is provided with a groove (22) matching the shape of the protrusion (15).

5. A protective device for monitoring leakage of a metal zinc oxide lightning arrester according to claim 4, characterized in that: A plurality of sliders (17) are provided inside the adjustment frame (8) on the other side of the sealing frame (14), and a plurality of slide grooves matching the shape of each slider (17) are provided on the surfaces at both ends of the protective cover (5), and each slider (17) is slidably connected to the inside of each slide groove.

6. A protective device for monitoring leakage of a metal zinc oxide lightning arrester according to claim 1, characterized in that: The outer end surface of each of the clamping blocks (11) is provided with an inclined surface inclined toward the inner end of the other side, and the inner end of each inclined surface extends to the interior of each of the inserting blocks (9).

7. A protective device for monitoring leakage of a metal zinc oxide lightning arrester according to claim 6, characterized in that: An oblique groove (21) is provided on one side surface of the protective cover (5) outside each of the insert blocks (9).

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