Surge protector online monitoring device

Abstract

The present invention relates to the technical field of monitoring devices, and specifically to an online monitoring device for a surge protector, comprising a connecting seat, a plurality of lightning protection shells are plugged into the inner side of the connecting seat, a varistor is arranged on the inner side of the lightning protection shell, a scale is engraved on one side of the lightning protection shell, a partition plate is fixedly installed on the inner side of the lightning protection shell, a monitoring mechanism is arranged on the side of the partition plate close to a thermal expansion plate, the monitoring mechanism includes an indicator plate, and a pushing mechanism is arranged on one side of the thermal expansion plate; the present invention adopts the coordination of the monitoring mechanism and the scale, when the varistor ages, the heat dissipated by the varistor increases, and the heat absorbed by the thermal expansion plate increases, thereby gradually increasing the bending degree of the thermal expansion plate, and then gradually increasing the rising height of the indicator plate in the monitoring mechanism, and the staff can grasp the aging degree of the varistor through the corresponding position of the indicator plate.

Description

Technical Field

[0001] The invention relates to the technical field of monitoring devices, in particular to an online monitoring device for a surge protector. Background Art

[0002] A surge protector is an electrical protection device used to protect electrical equipment from voltage surges or power surges. A surge refers to a short, abnormal increase in voltage that may cause serious damage to the equipment. The main function of a surge protector is to suppress this voltage surge and protect the connected electronic equipment from damage. When a voltage surge or power surge occurs, the surge protector can quickly detect the voltage abnormality and guide the excess electrical energy to the ground wire through its internal components, thereby preventing high voltage from affecting the connected electrical equipment. After the surge ends, the protection elements of the surge protector will return to their initial state to ensure the normal operation of the electrical equipment.

[0003] The lightning arrester in the surge protector is mainly used to deal with overvoltage caused by external lightning strikes or power system failures. It mainly relies on the internal gas discharge tube or varistor to play a protective role. The impedance of the varistor decreases with the increase of voltage. When the external voltage exceeds the withstand voltage of the varistor, the impedance of the varistor decreases sharply, and the current will flow to the ground through the varistor, thereby suppressing the voltage to a safe level and avoiding damage to the back-end equipment.

[0004] A Chinese patent application with publication number CN114487912A discloses a surge protector leakage monitoring system that can respond quickly, including a horizontally arranged box. The invention can achieve that when the surge protector is damaged and a red signal is sent out through the indicator light, the red signal light source can be enlarged through the magnifying glass through the mutual cooperation between components such as a magnifying glass, a through-beam photoelectric sensor, and a buzzer.

[0005] A Chinese patent application with publication number CN112816902B discloses a method and device for monitoring the AC leakage current of a surge protector, and a surge protector, comprising: measuring the AC leakage current of the surge protector; when the AC leakage current is greater than the alarm threshold, issuing an alarm signal, and / or comparing an average value of the AC leakage current with an average value of the alarm threshold, and issuing an alarm signal when the average value of the AC leakage current is greater than the average value of the alarm threshold.

[0006] The above and similar prior arts can solve the warning function of surge protectors to a certain extent. However, the varistor in the prior art will cause the leakage current to increase due to the change of its internal resistance after aging, resulting in increased power consumption of the protector itself, and even unnecessary heat or energy waste, making the varistor unable to handle surges with large energy. The protective effect of the equipment is weakened, and even equipment damage may occur. In addition, when a higher current passes through, more heat is generated, increasing the risk of overheating, which may eventually cause the varistor to be damaged, deformed or even burned, thereby increasing the risk of fire.

[0007] Therefore, the present invention provides an online monitoring device for a surge protector which can clearly grasp the aging condition of a varistor and can automatically detach from a connecting socket when the varistor has aged to a certain extent. Summary of the invention

[0008] In view of the fact that the aging of varistors cannot be grasped in the prior art, there are risks such as damage to the protected equipment and even fire, and an online monitoring device for surge protectors is designed.

[0009] The technical solution adopted by the present invention to solve its technical problems is: an online monitoring device for a surge protector comprises a connecting seat, a plurality of lightning protection shells are plugged into the inner side of the connecting seat, a varistor is arranged on the inner side of the lightning protection shell, a scale is engraved on one side of the lightning protection shell, a partition plate is fixedly installed on the inner side of the lightning protection shell, and the varistor is located on one side of the partition plate, a support rod is fixedly installed on the other side of the partition plate, a thermal expansion plate is rotatably installed on the outer side of the support rod, the thermal expansion plate is welded from two metal plates with different thermal expansion coefficients, a heat transfer column is fixedly installed on the side of the varistor close to the partition plate, one end of the heat transfer column passes through the partition plate and is fixedly connected to the side of the metal plate with a higher thermal expansion coefficient of the thermal expansion plate, a tooth plate is arranged at the bottom of the thermal expansion plate, a monitoring mechanism is arranged on the side of the partition plate close to the thermal expansion plate, the monitoring mechanism comprises a large rope drum, a tooth tube is fixedly installed on the side of the large rope drum away from the partition plate, and the tooth tube meshes with the tooth plate The outer side of the large rope drum is fixedly installed with one end of a connecting rope, and the other end of the connecting rope is fixedly installed with a small rope drum, and the connecting rope is wound around the outer side of the small rope drum, and a screw rod is fixedly installed on the inner side of the small rope drum, and a threaded ring is threadedly installed on the outer side of the screw rod, and an indicator plate is fixedly installed on the outer side of the threaded ring, and a pushing mechanism is provided on the side of the heat expansion plate away from the scale, and the pushing mechanism includes a spring, one end of the spring is fixedly installed on the side of the rod frame away from the scale, and the other end of the spring is fixedly installed with a push rod; the monitoring mechanism is configured to drive the tooth plate to move through the thermal expansion deformation of the heat expansion plate, and drive the large rope drum to rotate through the meshing transmission of the tooth plate and the tooth tube, and the large rope drum drives the screw rod to rotate through the transmission between the connecting rope and the small rope drum, so that the screw rod adjusts the position of the indicator plate by the threaded action, and the indicator plate points to different scale positions; the pushing mechanism is configured to push the lightning protection shell out and separate it from the connecting seat through the push rod when the heat transfer column is overheated.

[0010] Furthermore, the inner side of the lightning protection shell is divided into a placement cavity and an active cavity by a partition plate. The varistor is located on the inner side of the placement cavity. Two connecting ends are fixedly installed on one side of the varistor. The connecting ends pass through the interior of the lightning protection shell and are plugged into the connecting seat. The two ends of the support rod are fixedly connected to the inner walls of the active cavity on both sides. A limiting hole is penetrated through one side of the lightning protection shell, and the limiting hole is communicated with the active cavity. The limiting hole is adjacent to the position of the scale. A red display panel is inlaid on one side of the lightning protection shell, and the red display panel is located at the top of the scale.

[0011] Furthermore, two rod racks are fixedly installed on one side of the partition plate close to the support rod, and the rod rack is composed of two thin rods and two brackets. A sliding plate is slidably installed on the outer side of the thin rod of the rod rack, and the sliding plate close to the bottom is fixedly connected to one end of the tooth plate. A limiting rod is fixedly installed on the bottom of the rod rack close to the bottom through the support plate, and the tooth plate runs through the rod rack and the limiting rod, and the limiting rod contacts the bottom of the tooth plate, and the limiting rod supports the tooth plate so that the tooth plate engages with the tooth tube.

[0012] Furthermore, hinged columns are fixedly installed on both sides of the thermal expansion plate, and the hinged columns are hinged to the sliding plate.

[0013] Furthermore, the monitoring mechanism also includes a support rod, which is fixedly installed on one side of the partition plate close to the support rod, and the large rope drum is rotatably installed on the outer side of the support rod.

[0014] Furthermore, the screw rod is installed through the bottom of the lightning protection shell through a bearing, one end of the screw rod is rotatably installed on the inner side of the top wall of the movable cavity through a bearing, and the other end of the screw rod is fixedly installed with a rotary column.

[0015] Furthermore, two inclined panels are fixedly mounted on a side of the sliding plate away from the scale.

[0016] Furthermore, the ejection mechanism also includes a snap-in hole, which runs through the interior of the bracket on the side of the rod frame away from the scale. The snap-in hole consists of a circular hole and two transverse holes. A guide tube is fixedly installed on the side of the rod frame away from the scale, and the spring and the push rod are located on the inner side of the guide tube.

[0017] Furthermore, one end of the push rod passes through the interior of the lightning protection shell, and the other end of the push rod is fixedly installed with one end of a connecting rod. The other end of the connecting rod passes through one side of the rod frame and is rotatably installed with a T-shaped rotating rod through a bearing. The other two ends of the T-shaped rotating rod are rotatably installed with balls through bearings, and the balls are in contact with one side of the bracket with a clamping hole.

[0018] Beneficial effects of the present invention:

[0019] (1) The surge protector online monitoring device described in the present invention adopts the coordination of a monitoring mechanism and a scale. When the varistor ages, the heat dissipated by the varistor increases, and the heat absorbed by the thermal expansion plate increases, thereby gradually increasing the bending degree of the thermal expansion plate, and then gradually increasing the rising height of the indicator plate in the monitoring mechanism. When the indicator plate moves from the scale to the position of the red display plate, that is, the varistor has aged to the threshold, the staff can grasp the aging degree of the varistor through the corresponding position of the indicator plate.

[0020] (2) The surge protector online monitoring device described in the present invention adopts the linkage of the monitoring mechanism and the ejection mechanism. When the indicator plate moves from the scale to the position of the red display plate, the thermal expansion plate drives the T-shaped rotating rod in the ejection mechanism to rotate, so that the T-shaped rotating rod rotates to a position that coincides with the transverse hole of the snap-in hole, and the contact locks the push rod, so that the push rod pushes the connecting seat, and the reaction force is used to separate the lightning protection shell from the connecting seat, so that the varistor is no longer connected to the connecting seat, thereby preventing the varistor from excessive aging and burning, and reducing the risk of fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the surge protector of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the placement cavity of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the active cavity of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the inner side of the active cavity of the present invention;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the monitoring mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the ejection mechanism of the present invention;

[0028] Figure 7 For the present invention Figure 4 A local enlarged structural schematic diagram;

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the thermal expansion plate of the present invention when it is bent.

[0030] In the figure: 1, connecting seat; 2, lightning protection shell; 3, partition plate; 4, varistor; 5, heat transfer column; 6, limit hole; 7, scale; 8, red display board; 9, support rod; 10, thermal expansion plate; 11, hinged column; 12, sliding plate; 13, rod frame; 14, tooth plate; 15, monitoring mechanism; 151, support rod; 152, tooth tube; 153, large rope drum; 154, screw rod; 155, threaded ring; 156, indicator board; 157, rotating column; 158, small rope drum; 159, connecting rope; 16, limit rod; 17, ejection mechanism; 171, clamping hole; 172, guide tube; 173, spring; 174, push rod; 175, connecting rod; 176, T-shaped rotating rod; 177, rolling ball; 18, inclined panel. DETAILED DESCRIPTION

[0031] In order to make the technical means, technical features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0032] Example: Figure 1-Figure 8As shown, the online monitoring device of the surge protector described in the present invention includes a connecting seat 1, a plurality of lightning protection shells 2 are plugged into the inner side of the connecting seat 1, a varistor 4 is arranged on the inner side of the lightning protection shell 2, a scale 7 is engraved on one side of the lightning protection shell 2, a partition plate 3 is fixedly installed on the inner side of the lightning protection shell 2, and the varistor 4 is located on one side of the partition plate 3, the inner side of the lightning protection shell 2 is divided into a placement cavity and an active cavity by the partition plate 3, the varistor 4 is located on the inner side of the placement cavity, one side of the varistor 4 is fixedly installed with two connecting ends, the connecting ends pass through the interior of the lightning protection shell 2 and are plugged into the connecting seat 1, the two ends of the support rod 9 are fixedly connected to the inner walls of the two sides of the active cavity, a limiting hole 6 is penetrated through one side of the lightning protection shell 2, and the limiting hole 6 is communicated with the active cavity, the limiting hole 6 is adjacent to the position of the scale 7, and a red display panel 8 is inlaid and installed on one side of the lightning protection shell 2, and the red display panel 8 is located on the top of the scale 7.

[0033] Specifically, the connecting seat 1 can provide a plug-in function for the lightning protection shell 2, the lightning protection shell 2 can provide a placement space for the partition plate 3, the lightning protection shell 2 can provide an opening space for the placement cavity and the movable cavity, the placement cavity can provide a placement space for the varistor 4, the movable cavity can provide an activity space for the monitoring mechanism 15 and the ejection mechanism 17, the lightning protection shell 2 can provide a through opening space for the limit hole 6, the limit hole 6 can provide an activity space for the indicator plate 156, and at the same time, the limit hole 6 cooperates with the indicator plate 156 to provide a limiting function for the threaded ring 155, thereby limiting the threaded ring 155 and the screw rod 154 to move up and down when the threaded action occurs, the lightning protection shell 2 can provide a depiction space for the scale 7, the scale 7 can specifically display the rising height of the indicator plate 156, and the aging degree of the varistor 4 is determined by the height, the lightning protection shell 2 can provide an inlay space for the red display board 8, and the red display board 8 can provide a warning function for the staff. When the indicator plate 156 moves to the position of the red display board 8, it indicates that the varistor 4 has aged to a certain extent, reminding the staff that it needs to be replaced.

[0034] In this embodiment, a support rod 9 is fixedly installed on the other side of the partition plate 3, and a thermal expansion plate 10 is rotatably installed on the outer side of the support rod 9. The thermal expansion plate 10 is welded from two metal plates with different thermal expansion coefficients, and the metal plate with a lower thermal expansion coefficient is rotatably connected to the support rod 9 through a pipe sleeve. A heat transfer column 5 is fixedly installed on the side of the varistor 4 close to the partition plate 3, and one end of the heat transfer column 5 penetrates the partition plate 3 and is fixedly connected to the side of the metal plate with a higher thermal expansion coefficient of the thermal expansion plate 10. Two rod racks 13 are fixedly installed on the side of the partition plate 3 close to the support rod 9. The rod rack 13 consists of two thin rods and two brackets. A sliding plate 12 is slidably installed on the outer side of the thin rod of the rod rack 13. A tooth plate 14 is provided at the bottom of the thermal expansion plate 10. The sliding plate 12 close to the bottom is fixedly connected to one end of the tooth plate 14. A limiting rod 16 is fixedly installed on the bottom of the rod rack 13 close to the bottom, and the limiting rod 16 contacts with the bottom of the tooth plate 14. Hinged columns 11 are fixedly installed on both sides of the thermal expansion plate 10, and the hinged columns 11 are hinged to the sliding plate 12.

[0035] Specifically, the partition plate 3 can provide a stable support for the support rod 9, the support rod 9 can provide a bending support for the thermal expansion plate 10, the heat transfer column 5 can provide heat transfer for the varistor 4 and the thermal expansion plate 10, and the two metal plates with different thermal expansion coefficients of the thermal expansion plate 10 will bend and expand when heated, but the metal plate with a high thermal expansion coefficient is connected to the heat transfer column 5 to absorb the heat dissipated by the varistor 4 and bends more, and the metal plate with a small thermal expansion coefficient bends less when heated. Under the interaction force between the two, the thermal expansion plate 10 bends toward the support rod 9, and the thermal expansion plate 10 can be hinged. The column 11 provides a stable support, the hinged column 11 can provide a hinged effect with the sliding plate 12, the partition plate 3 can provide a stable support for the rod frame 13, the rod frame 13 can provide a guiding effect for the sliding plate 12, so that when the heat expansion plate 10 is bent, the sliding plate 12 is driven to move by the hinged effect of the hinged column 11 and the sliding plate 12, so that the sliding plate 12 slides backward under the guidance of the rod frame 13, the rod frame 13 can provide a stable support for the limit rod 16, and the limit rod 16 can provide a limiting support effect for the tooth plate 14, so as to ensure that the tooth plate 14 and the tooth tube 152 can be stably engaged.

[0036] In this embodiment, a monitoring mechanism 15 is provided on the side of the partition plate 3 close to the heat expansion plate 10, and the monitoring mechanism 15 includes an indicator plate 156. The monitoring mechanism 15 is equipped to adjust the position of the indicator plate 156 through the thermal expansion deformation of the heat expansion plate 10, so that the indicator plate 156 points to different scale 7 positions; the monitoring mechanism 15 also includes a support rod 151, the support rod 151 is fixedly installed on the side of the partition plate 3 close to the support rod 9, and a large rope drum 153 is rotatably installed on the outer side of the support rod 151. A tooth tube 152 is fixedly installed on the side of the large rope drum 153 away from the partition plate 3, and the tooth tube 152 is meshed with the tooth plate 14. The monitoring mechanism 15 also includes a screw rod 154, which is installed on the bottom of the lightning protection shell 2 through a bearing, one end of the screw rod 154 is rotatably installed on the inner side of the top wall of the movable cavity through a bearing, and the other end of the screw rod 154 is fixedly installed with a rotary column 157, and the outer side of the screw rod 154 is threadedly installed with a threaded ring 155, and the threaded ring 155 is fixedly connected to one end of the indicator plate 156, and a small rope drum 158 is fixedly installed on the outer side of the screw rod 154, and one end of a connecting rope 159 is fixedly installed on the inner side of the small rope drum 158, and the connecting rope 159 is wound around the inner side of the small rope drum 158, and the other end of the connecting rope 159 is fixedly installed on the inner side of the large rope drum 153.

[0037] Specifically, the partition plate 3 can provide a stable support for the support rod 151, the support rod 151 can provide a rotational support for the large rope drum 153 and the tooth tube 152, the tooth tube 152 can provide a meshing effect for the tooth plate 14, and the large rope drum 153 can provide a storage space for the connecting rope 159. When the tooth plate 14 and the tooth tube 152 are meshed, the tooth tube 152 rotates with the support rod 151 as a rotational support, and the tooth tube 152 and the large rope drum 153 form a speed change combination. Since the diameter of the large rope drum 153 is large, the linear speed of the large rope drum 153 is large, so that the indicator plate 156 can be convenient for long-distance up and down movement. The lightning protection shell 2 can provide a rotational support for the screw rod 154, and the screw rod 154 can provide a stable support for the rotary column 157. The rotary column 157 can be The indicator plate 156 provides a zeroing function. After the device is installed, the indicator plate 156 is moved to the lowest point by rotating the rotary column 157 to perform zeroing on the monitoring mechanism 15. The screw rod 154 can provide a stable support for the small rope drum 158. The small rope drum 158 can provide an initial winding space for the connecting rope 159. The screw rod 154 can provide a threading effect for the threaded ring 155. When the large rope drum 153 rotates to drive the connecting rope 159 to move, the connecting rope 159 is stored and wound on the inner side of the large rope drum 153. The movement of the connecting rope 159 drives the small rope drum 158 to rotate, so that the small rope drum 158 drives the screw rod 154 to rotate under the action of the connecting rope 159. The screw rod 154 and the threaded ring 155 have a threading effect, so that the threaded ring 155 drives the indicator plate 156 to move upward.

[0038] In this embodiment, a push-out mechanism 17 is provided on the side of the heat expansion plate 10 away from the scale 7, and the push-out mechanism 17 includes a push rod 174; the push-out mechanism 17 is configured to push the lightning protection shell 2 out and separate it from the connecting seat 1 through the push rod 174 when the heat transfer column 5 is overheated, and two inclined panels 18 are fixedly installed on the side of the sliding plate 12 away from the scale 7. The push-out mechanism 17 also includes a clamping hole 171, which runs through the inside of the bracket opened on the side of the rod frame 13 away from the scale 7. The clamping hole 171 consists of a circular hole and two transverse holes. The side of the rod frame 13 away from the scale 7 is fixedly installed with a guide tube 1 72, one end of a spring 173 is fixedly installed on the side of the rod frame 13 away from the scale 7, the other end of the spring 173 is fixedly connected to a push rod 174, and the spring 173 and the push rod 174 are located on the inner side of the guide tube 172, one end of the push rod 174 passes through the interior of the lightning protection shell 2, and the other end of the push rod 174 is fixedly installed with one end of a connecting rod 175, the other end of the connecting rod 175 passes through one side of the rod frame 13, and a T-shaped rotating rod 176 is rotatably installed through a bearing, and the other two ends of the T-shaped rotating rod 176 are rotatably installed with a ball 177 through a bearing, and the ball 177 contacts one side of the bracket with a snap-in hole 171.

[0039] Specifically, the rod frame 13 can provide a penetration space for the clamping hole 171, the circular hole of the clamping hole 171 can provide a penetration space for the inclined plate 18, and the two transverse holes of the clamping hole 171 can provide a penetration space for the T-shaped rotating rod 176. At the same time, the clamping hole 171 and the T-shaped rotating rod 176 cooperate to provide a clamping effect for the push rod 174. The rod frame 13 can provide a stable support for the guide tube 172, and the guide tube 172 can provide a guiding effect for the activities of the spring 173 and the push rod 174. The initial state of the spring 173 is a compressed state. Through the thrust of the spring 173 on the push rod 174, the push rod 174 pulls the T-shaped rotating rod 176 through the connecting rod 175, and the connecting rod 175 can provide rotation support for the T-shaped rotating rod 176. The rolling ball 177 can reduce the friction for the rotation of the T-shaped rotating rod 176, and the rolling ball 177 and the T-shaped rotating rod 176 are connected. The connected bearings are angular contact bearings. The sliding plate 12 can provide stable support for the inclined plate 18, and the inclined plate 18 can provide inclined surface resistance for the T-shaped rotating rod 176. When the sliding plate 12 drives the two inclined plates 18 to contact the T-shaped rotating rod 176, the T-shaped rotating rod 176 rotates under the resistance of the inclined plate 18, and the T-shaped rotating rod 176 rotates under the support of the rolling ball 177, and the inclined plate 18 gradually enters the inner side of the clamping hole 171. When the T-shaped rotating rod 176 rotates to the horizontal position, the two transverse holes of the T-shaped rotating rod 176 and the clamping hole 171 coincide, releasing the clamping effect on the push rod 174. At this time, the compressed spring 173 pushes the push rod 174 to move in the direction of the connecting seat 1 under the action of its own elastic force, and uses the reaction force of the connecting seat 1 to push the lightning protection shell 2 to move toward the front, thereby separating the lightning protection shell 2 from the connecting seat 1.

[0040] Working principle: The initial state is as follows Figure 3 As shown in FIG. 1 , when a surge occurs, the varistor 4 generates heat, causing the heat transfer column 5 to transfer heat to the heat expansion plate 10 through its own heat conduction. The metal plate with a high thermal expansion coefficient fixedly connected to the heat transfer column 5 deforms more than the metal plate with a low thermal expansion coefficient, causing the heat expansion plate 10 to bend toward one side of the support rod 9, as shown in FIG. Figure 8 As shown;

[0041] When the heat expansion plate 10 expands and bends, the two ends of the heat expansion plate 10 move to the side away from the scale 7, so that the heat expansion plate 10 drives the two sliding plates 12 to slide to the side away from the scale 7 through the hinge action of the hinge column 11, and the sliding plate 12 slides under the guidance and support of the rod frame 13, so that the sliding plate 12 drives the tooth plate 14 at the bottom to move, and the tooth plate 14 moves and meshes with the tooth tube 152, so that the tooth tube 152 drives the large rope drum 153 to rotate clockwise under the meshing action, and the large rope drum 153 rotates The connecting rope 159 is driven to move, so that the connecting rope 159 is stored and wound on the inner side of the large rope drum 153. The movement of the connecting rope 159 drives the small rope drum 158 to rotate, so that the small rope drum 158 drives the screw rod 154 to rotate under the action of the connecting rope 159. The screw rod 154 and the threaded ring 155 have a threading action. The threaded ring 155 moves upward under the interference and limiting action of the indicating plate 156 and the limiting hole 6, so that the threaded ring 155 drives the indicating plate 156 to move upward, and the scale 7 indicated by the position of the indicating plate 156 is read;

[0042] When a surge occurs, the varistor 4 can reduce resistance to allow current to flow underground. However, as the working time of the varistor 4 increases, the varistor 4 gradually ages, thereby increasing the heat generation capacity of the varistor 4, causing the thermal expansion plate 10 to expand and bend gradually, thereby increasing the distance the indicator plate 156 moves upward. The scale 7 indicated by the indicator plate 156 can clearly understand the aging degree of the varistor 4.

[0043] After the surge ends, the heat expansion plate 10 gradually returns to the normal temperature state. Due to the temperature recovery, the shape of the heat expansion plate 10 gradually returns to the initial state. During the recovery process, the heat expansion plate 10 drives the tooth plate to move in the direction of the scale, and the tooth plate 14 rotates in the opposite direction through the tooth tube 152, thereby driving the large rope drum 153 to rotate in the opposite direction. At this time, the connecting rope 159 wrapped around the outer side of the large rope drum 153 is loosened, but it will not cause external force to the lead screw 154, so the position of the indicator plate 156 will not move, which is convenient for the staff to judge the aging degree of the varistor 4 through the indicator plate 156 during the time when no surge occurs, which means that the indicator plate 156 will only rise with the aggravation of aging, and will not fall with the end of the surge;

[0044] When the varistor 4 ages to the rated threshold, the indicator plate 156 moves upward to the position of the red display plate 8, and at the same time, the thermal expansion plate 10 drives the two sliding plates 12 to contact one side of the bracket with the clamping hole 171. When the sliding plate 12 moves toward the back and gradually approaches the bracket, the sliding plate 12 drives the two inclined plates 18 to move in the direction of the T-shaped rotating rod 176. When the inclined plate 18 moves to contact the T-shaped rotating rod 176, since the inclined plate 18 is fixed, the T-shaped rotating rod 176 rotates with the connecting rod 175 as the center of the circle under the resistance of the inclined plate 18, and the T-shaped rotating rod 176 drives the rolling ball 177 to roll on the surface of the bracket, and the inclined plate 18 gradually enters the clamping hole 171. When the T-shaped rotating rod 176 rotates to a horizontal position under the interference of the inclined plate 18, the T-shaped rotating rod 176 coincides with the two transverse holes of the clamping hole 171. At this time, the spring 173 pushes the push rod 174 to move toward the direction of the connecting seat 1 under the action of its own elastic force. The push rod 174 drives the T-shaped rotating rod 176 through the clamping hole 171 through the connecting rod 175, so that the T-shaped rotating rod 176 is separated from the inclined plate 18. The push rod 174 pushes the bracket under the reaction force of the connecting seat 1, so that the bracket drives the lightning protection shell 2 to move toward the front under the reaction force, thereby separating the lightning protection shell 2 from the connecting seat 1, and separating the output end of the varistor 4 from the connecting seat 1, preventing the varistor 4 from overheating and spontaneous combustion after excessive aging.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An online monitoring device for a surge protector, comprising a connection base (1), a plurality of lightning protection shells (2) being plugged into the inner side of the connection base (1), a varistor (4) being arranged on the inner side of the lightning protection shell (2), characterized in that: One side of the lightning protection shell (2) is engraved with a scale (7), a partition plate (3) is fixedly installed on the inner side of the lightning protection shell (2), and the varistor (4) is located on one side of the partition plate (3), a support rod (9) is fixedly installed on the other side of the partition plate (3), and a heat expansion plate (10) is rotatably installed on the outer side of the support rod (9), and the heat expansion plate (10) is formed by welding two metal plates with different thermal expansion coefficients, and a heat transfer column (5) is fixedly installed on the side of the varistor (4) close to the partition plate (3), one end of the heat transfer column (5) passes through the partition plate (3) and is fixedly connected to the side of the metal plate with a higher thermal expansion coefficient of the heat expansion plate (10), and a tooth plate (14) is arranged at the bottom of the heat expansion plate (10), and a monitoring mechanism (15) is arranged on the side of the partition plate (3) close to the heat expansion plate (10), and the monitoring mechanism (15) includes a large rope drum (153), and the large rope drum (153) is far away from the partition plate. A tooth tube (152) is fixedly mounted on one side of the large rope drum (153), and the tooth tube (152) is meshed with the tooth plate (14); one end of a connecting rope (159) is fixedly mounted on the outer side of the large rope drum (153); a small rope drum (158) is fixedly mounted on the other end of the connecting rope (159), and the connecting rope (159) is wound around the outer side of the small rope drum (158); a screw rod (154) is fixedly mounted on the inner side of the small rope drum (158); a threaded ring (155) is threadedly mounted on the outer side of the screw rod (154); an indicator plate (156) is fixedly mounted on the outer side of the threaded ring (155); a push-out mechanism (17) is provided on the side of the heat expansion plate (10) away from the scale (7); the push-out mechanism (17) includes a spring (173); one end of the spring (173) is fixedly mounted on the side of the rod frame (13) away from the scale (7); and a push rod (174) is fixedly mounted on the other end of the spring (173); The monitoring mechanism (15) is configured to drive the tooth plate (14) to move through the thermal expansion deformation of the thermal expansion plate (10), and to drive the large rope drum (153) to rotate through the meshing transmission between the tooth plate (14) and the tooth tube (152). The large rope drum (153) drives the screw rod (154) to rotate through the transmission between the connecting rope (159) and the small rope drum (158), so that the screw rod (154) adjusts the position of the indicating plate (156) by the action of the thread, and the indicating plate (156) points to different scale (7) positions; The ejection mechanism (17) is configured to, when the heat transfer column (5) is overheated, push the lightning protection shell (2) out of the connection seat (1) through the push rod (174).

2. The surge protector online monitoring device according to claim 1, characterized in that: The inner side of the lightning protection shell (2) is divided into a placement cavity and an active cavity by a partition plate (3), the varistor (4) is located on the inner side of the placement cavity, one side of the varistor (4) is fixedly mounted with two connection ends, the connection ends pass through the interior of the lightning protection shell (2) and are plugged into the connection seat (1), the two ends of the support rod (9) are fixedly connected to the inner walls of the active cavity on both sides, one side of the lightning protection shell (2) is penetrated by a limit hole (6), the limit hole (6) is communicated with the active cavity, the limit hole (6) is adjacent to the position of the scale (7), and one side of the lightning protection shell (2) is inlaid with a red display panel (8), and the red display panel (8) is located at the top of the scale (7).

3. The surge protector online monitoring device according to claim 1, characterized in that: Two rod frames (13) are fixedly mounted on one side of the partition plate (3) close to the support rod (9), the rod frame (13) being composed of two thin rods and two brackets, a sliding plate (12) being slidably mounted on the outer side of the thin rod of the rod frame (13), the sliding plate (12) close to the bottom being fixedly connected to one end of a tooth plate (14), a limiting rod (16) being fixedly mounted on the bottom of the rod frame (13) close to the bottom through a support plate, the tooth plate (14) passing through the rod frame (13) and the limiting rod (16), the limiting rod (16) being in contact with the bottom of the tooth plate (14), the limiting rod (16) supporting the tooth plate (14) so ​​that the tooth plate (14) is meshed with the tooth tube (152).

4. The surge protector online monitoring device according to claim 3, characterized in that: Hinge columns (11) are fixedly mounted on both sides of the thermal expansion plate (10), respectively, and the hinge columns (11) are hinged to the sliding plate (12).

5. The surge protector online monitoring device according to claim 4, characterized in that: The monitoring mechanism (15) further comprises a support rod (151), the support rod (151) being fixedly mounted on a side of the partition plate (3) close to the support rod (9), and the large rope drum (153) being rotatably mounted on the outer side of the support rod (151).

6. The surge protector online monitoring device according to claim 5, characterized in that: The screw rod (154) is installed on the bottom of the lightning protection shell (2) through a bearing, one end of the screw rod (154) is rotatably installed on the inner side of the top wall of the movable cavity through a bearing, and a rotating column (157) is fixedly installed on the other end of the screw rod (154).

7. The surge protector online monitoring device according to claim 3, characterized in that: Two inclined panels (18) are fixedly mounted on the side of the sliding plate (12) away from the scale (7).

8. The surge protector online monitoring device according to claim 7, characterized in that: The ejection mechanism (17) further comprises a snap-in hole (171), the snap-in hole (171) extending through the interior of a bracket on a side of the rod frame (13) away from the scale (7), the snap-in hole (171) comprising a circular hole and two transverse holes, a guide tube (172) being fixedly mounted on the side of the rod frame (13) away from the scale (7), and a spring (173) and a push rod (174) being located on the inner side of the guide tube (172).

9. The surge protector online monitoring device according to claim 8, characterized in that: One end of the push rod (174) passes through the interior of the lightning protection shell (2), and one end of a connecting rod (175) is fixedly mounted on the other end of the push rod (174). The other end of the connecting rod (175) passes through one side of the rod frame (13) and is rotatably mounted with a T-shaped rotating rod (176) via a bearing. The other two ends of the T-shaped rotating rod (176) are rotatably mounted with a ball (177) via a bearing, and the ball (177) contacts one side of a bracket having a clamping hole (171).

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