Fixed gap overvoltage protector

Abstract

The invention discloses a fixed gap overvoltage protector, and relates to the field of overvoltage protectors. The fixed gap overvoltage protector comprises a shell and a wiring end, the wiring end is fixedly installed at the top of the shell and penetrates through the shell, the shell is made of an insulating material, a first electrode is fixedly installed on the surface of the wiring end and penetrates through the shell, a resistor is fixedly installed in the shell, and the resistor is fixedly connected with the wiring end. The resistance value in the resistor is inversely proportional to the voltage, a second electrode is fixedly mounted on the surface of the resistor and penetrates through the shell, a grounding end is fixedly mounted at the bottom of the resistor, a socket is fixedly mounted at the top of the grounding end, an insertion strip is arranged in the socket, and the socket and the insertion strip are conductive. The surface of the jack is sleeved with a protective sleeve, and the top of the insertion strip is fixedly provided with a connecting line, thereby facilitating the installation and disassembly of the connecting line, and facilitating a worker to separately check the connecting line and the protector body for troubleshooting.

Description

Technical Field

[0001] The present invention relates to the field of overvoltage protectors, in particular to a fixed gap overvoltage protector. Background Art

[0002] A gap-type overvoltage protector utilizes a gas discharge gap as its foundation and controls the discharge current to provide overvoltage protection. Its design principle primarily utilizes the arc discharge phenomenon generated by gas leakage discharge under high voltage to create a certain impedance within the discharge gap, thereby providing overvoltage protection. This type of protector typically consists of several ring electrodes and a central electrode, forming an electrode gap. Its principle is to protect the power system through air breakdown.

[0003] The invention patent with patent publication number CN 106253297 B discloses an overvoltage protector, which includes an automatic voltage regulating device connected in series to the neutral wire or the live wire, a control box is provided on one side of the automatic voltage regulating device, a voltage transformer is provided between the neutral wire and the live wire, the automatic voltage regulating device includes a protective shell and a servo motor arranged inside the protective shell, a lead screw is connected to the output shaft of the servo motor, a movable plate is embedded in the lead screw, a slider is connected to the bottom of the movable plate, a slide rail is connected to the bottom of the slider, a fixed seat is provided on the top of the movable plate, a resistor is provided on the top of the fixed seat, a sliding sleeve is movably provided on the resistor, and a spring-shaped wire is connected to the left side of the fixed seat.

[0004] In the above invention patent, the overall structure is simple and the design is reasonable. During operation, the voltage transformer can detect the changes in the power supply voltage in real time, and then drive the screw to move through the servo motor, thereby automatically adjusting the voltage drop on the resistor to achieve voltage stability and prevent excessive voltage. It is energy-saving and environmentally friendly, highly safe, and easy to use. However, the wiring is directly connected to the inside of the protector, which is not convenient for disassembly, inspection, and maintenance. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a fixed gap overvoltage protector, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a fixed gap overvoltage protector, comprising a shell and a terminal, the terminal being fixedly mounted on the top of the shell and passing through the shell, the shell being made of an insulating material, a first electrode being fixedly mounted on the surface of the terminal, and the first electrode passing through the shell, a resistor being fixedly mounted inside the shell, the resistance value inside the resistor being inversely proportional to the voltage, a second electrode being fixedly mounted on the surface of the resistor, and the second electrode passing through the shell, a grounding terminal being fixedly mounted on the bottom of the resistor, a socket being fixedly mounted on the top of the terminal, an insert being provided in the socket, and the socket and The insert is conductive, a protective cover is sleeved on the surface of the socket, a connecting wire is fixedly installed on the top of the insert, a steering block is rotatably installed on the end of the connecting wire away from the insert, a fixing clip is rotatably installed on the surface of the steering block, and vertical grooves are opened on the inner wall of the fixing clip. The steering block and the fixing clip are conductive, and the overvoltage in the transmission line is transmitted to the first electrode through the terminal. The strong voltage breaks through the gap between the first electrode and the second electrode, generating an arc discharge phenomenon. The overvoltage causes the internal resistance of the resistor to drop sharply, causing the generated huge current to flow into the ground through the grounding terminal at the bottom of the resistor, thereby preventing the large current from affecting the transmission line.

[0007] Preferably, a fixing plate is fixedly installed on the top of the shell, and a plurality of fixing rods are fixedly installed on the surface of the fixing plate. A plurality of wire clamping blocks are slidably installed on the surface of each fixing rod. An elastic member is provided between the wire clamping block and the fixing rod. A slot is provided on the surface of the wire clamping block. A push rod is slidably installed on the surface of the fixing plate. A first spring is provided between the push rod and the fixing plate. The surface of the push rod contacts the bottom of the wire clamping block. An inclined surface is provided on the end of the push rod away from the fixing plate. The excess part of the connecting wire can be wrapped around the surface of the wire clamping block to prevent the connecting wire from being wrapped around the surface of the transmission line and causing a short circuit.

[0008] Preferably, the resistor is made of zinc oxide as a main material, and the first electrode and the second electrode are aligned. When an overvoltage is generated, the strong voltage causes the internal resistance of the resistor to drop sharply, allowing the large current generated by the voltage to pass quickly.

[0009] Preferably, the surface of the connecting wire is wrapped with an insulating rubber sleeve to protect the connecting wire from being damaged.

[0010] Preferably, a base is provided at the bottom of the shell, a support frame is provided at the bottom of the base, the support frame is conductive, the grounding end of the bottom of the resistor is connected to the support frame inside the base, the base is insulated as a whole, a slide rail is fixedly installed on the top of the base, a fixing ring is slidably installed on the surface of the slide rail, a plurality of telescopic rods are rotatably installed on the inner wall of the fixing ring, the free end of the telescopic rod is hinged to the bottom of the shell, a cavity is provided inside the fixing ring, an air hole is opened on the surface of the fixing ring, a sealing cover is slidably installed on the surface of the fixing ring near the air hole, the air hole and the fixed end of the telescopic rod are connected in the internal cavity of the fixing ring, when the air hole is opened, the inside of the telescopic rod is connected to the outside world through the internal cavity of the fixing ring, and the telescopic rod is extended or contracted by air intake and exhaust.

[0011] Preferably, the outer wall of the free end of the telescopic rod and the inner wall of the fixed end are tightly fitted and sealed to ensure airtightness.

[0012] Preferably, a linkage disk is rotatably installed on the surface of the shell, a first torsion spring is provided between the linkage disk and the shell, a plurality of baffles are fixedly installed on the bottom of the linkage disk, a top ball is fixedly installed on the top of the linkage disk, a slide rod is slidably installed on the surface of the shell, a second spring is provided between the slide rod and the shell, the bottom of the slide rod contacts the surface of the top ball, two swivels are rotatably installed on the surface of the shell, a second torsion spring is provided between the swivel and the shell, the outer wall of the swivel contacts the surface of the slide rod, a scraper is fixedly installed on the surface of the swivel, the surfaces of the first electrode and the second electrode are both in contact with the scraper, the slide rod, swivel and scraper are all made of insulating material, and when the telescopic rod rotates, it pushes the baffle rod to move, and the moving baffle rod drives the linkage disk to rotate.

[0013] Preferably, the scraper shape matches the cross-sectional profile of the first electrode and the second electrode, and the scraper scrapes away the dust attached to the surface of the first electrode and the second electrode when rotating, ensuring the conductivity between the first electrode and the second electrode.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The fixed gap overvoltage protector adopts a modular design between the connecting wire and the protector body, which is convenient for the installation and removal of the connecting wire, and convenient for the staff to check the connecting wire and the protector body separately to troubleshoot the fault. Different types of connecting wires can also be selected according to different working conditions. The excess part of the connecting wire can be wrapped around the wire clamping block to prevent the connecting wire from being entangled and knotted due to strong winds, resulting in a short circuit in the line, causing the line to burn and cause a fire.

[0016] (2) The fixed gap overvoltage protector can adjust the working area of ​​the protector by moving the fixing ring, and the outer shell can also be moved to position the protector more accurately. After the protector is moved, the sliding sealing cover closes the air hole, and the telescopic rod cannot be extended or rotated. The fixed telescopic rod supports the protector, allowing the protector to continue working in a stable posture, avoiding shaking of the protector that affects the conductive performance of the internal structure.

[0017] (3) When the fixed gap overvoltage protector is moved, the shell drives the telescopic rod to extend and rotate, and the rotating telescopic rod pushes the blocking rod to move. The moving blocking rod drives the top ball on the surface of the linkage disk to move. The top ball pushes up the sliding rod so that the sliding rod rubs against the surface of the rotating ring and drives the rotating ring to rotate. The rotating rotating ring drives the scraper to rotate and scrape away the dust attached to the surface of the first electrode and the second electrode, so as to prevent the dust from covering and affecting the conductivity between the first electrode and the second electrode, resulting in the protector being unable to protect the line. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the resistor and housing position structure of the present invention;

[0020] Figure 3 This is a schematic diagram of the position structure of the fixing plate and the housing of the present invention;

[0021] Figure 4 This is a schematic diagram of the position structure of the steering block and the connecting line of the present invention;

[0022] Figure 5 This is a schematic diagram of the position structure of the wire clamping block and the fixing rod of the present invention;

[0023] Figure 6 This is a schematic diagram of the position structure of the fixing ring and the slide rail of the present invention.

[0024] Figure 7 This is a schematic diagram of the position structure of the rotating ring and the sliding rod of the present invention.

[0025] In the figure: 1. Shell; 2. Terminal; 3. Resistor; 4. Grounding terminal; 5. First electrode; 6. Second electrode; 7. Socket; 8. Insert strip; 9. Connecting wire; 10. Protective cover; 11. Steering block; 12. Fixing clip; 13. Vertical stripes; 14. Fixing plate; 15. Fixing rod; 16. Abutment; 17. Wire clamping block; 171. Slot; 18. Telescopic rod; 19. Fixing ring; 20. Air hole; 21. Sealing cover; 22. Slide rail; 23. Base; 24. Linkage disk; 25. Stop rod; 26. Top ball; 27. Slide rod; 28. Swivel; 29. ​​Scraper. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 7 The present invention provides a technical solution: a fixed gap overvoltage protector, comprising a shell 1 and a terminal 2, the terminal 2 is fixedly mounted on the top of the shell 1 and passes through the shell 1, the shell 1 is made of insulating material, a first electrode 5 is fixedly mounted on the surface of the terminal 2, and the first electrode 5 passes through the shell 1, a resistor 3 is fixedly mounted inside the shell 1, the resistance value inside the resistor 3 is inversely proportional to the voltage, a second electrode 6 is fixedly mounted on the surface of the resistor 3, and the second electrode 6 passes through the shell 1, a grounding terminal 4 is fixedly mounted on the bottom of the resistor 3, a socket 7 is fixedly mounted on the top of the terminal 2, a plug strip 8 is provided in the socket 7, the socket 7 and the plug strip 8 are conductive, and the socket 7 A protective cover 10 is sleeved on the surface, a connecting wire 9 is fixedly installed on the top of the insert 8, a steering block 11 is rotatably installed on the end of the connecting wire 9 away from the insert 8, a fixing clip 12 is rotatably installed on the surface of the steering block 11, and vertical grooves 13 are opened on the inner wall of the fixing clip 12. The steering block 11 and the fixing clip 12 are conductive. The overvoltage in the transmission line is transmitted to the first electrode 5 through the terminal 2. The strong voltage breaks through the gap between the first electrode 5 and the second electrode 6, generating an arc discharge phenomenon. The overvoltage causes the internal resistance of the resistor 3 to drop sharply, causing the generated huge current to flow into the ground through the grounding terminal 4 at the bottom of the resistor 3, thereby preventing the large current from affecting the transmission line.

[0028] A fixing plate 14 is fixedly installed on the top of the shell 1, and several fixing rods 15 are fixedly installed on the surface of the fixing plate 14. Several wire clamping blocks 17 are slidably installed on the surface of each fixing rod 15. An elastic member is provided between the wire clamping block 17 and the fixing rod 15. A slot 171 is provided on the surface of the wire clamping block 17. A push rod 16 is slidably installed on the surface of the fixing plate 14. A first spring is provided between the push rod 16 and the fixing plate 14. The surface of the push rod 16 contacts the bottom of the wire clamping block 17. An inclined surface is provided on the end of the push rod 16 away from the fixing plate 14. The excess part of the connecting line 9 can be wrapped around the surface of the wire clamping block 17 to prevent the connecting line 9 from being wrapped around the surface of the transmission line and causing a short circuit.

[0029] The resistor 3 is made of zinc oxide as the main material, and the first electrode 5 and the second electrode 6 are aligned. When an overvoltage is generated, the strong voltage causes the internal resistance of the resistor 3 to drop sharply, allowing the large current generated by the voltage to pass quickly.

[0030] The surface of the connecting wire 9 is wrapped with an insulating rubber sleeve to protect the connecting wire 9 from being damaged.

[0031] A base 23 is provided at the bottom of the shell 1, and a support frame is provided at the bottom of the base 23. The support frame is conductive, and the grounding terminal 4 at the bottom of the resistor 3 is connected to the support frame inside the base 23. The base 23 is insulated as a whole. A slide rail 22 is fixedly installed on the top of the base 23, and a fixing ring 19 is slidably installed on the surface of the slide rail 22. A number of telescopic rods 18 are rotatably installed on the inner wall of the fixing ring 19. The free end of the telescopic rod 18 is hinged to the bottom of the shell 1, and a cavity is provided inside the fixing ring 19. An air hole 20 is opened on the surface of the fixing ring 19. A sealing cover 21 is slidably installed on the surface of the fixing ring 19 near the air hole 20. The air hole 20 and the fixed end of the telescopic rod 18 are connected in the internal cavity of the fixing ring 19. When the air hole 20 is opened, the interior of the telescopic rod 18 is connected to the outside world through the internal cavity of the fixing ring 19, and the telescopic rod 18 is extended or contracted by air intake and exhaust.

[0032] The outer wall of the free end of the telescopic rod 18 and the inner wall of the fixed end are tightly fitted together to ensure airtightness.

[0033] A linkage disk 24 is rotatably installed on the surface of the shell 1, a first torsion spring is provided between the linkage disk 24 and the shell 1, a number of baffles 25 are fixedly installed on the bottom of the linkage disk 24, a top ball 26 is fixedly installed on the top of the linkage disk 24, a slide rod 27 is slidably installed on the surface of the shell 1, a second spring is provided between the slide rod 27 and the shell 1, the bottom of the slide rod 27 is in contact with the surface of the top ball 26, two swivels 28 are rotatably installed on the surface of the shell 1, a second torsion spring is provided between the swivel 28 and the shell 1, the outer wall of the swivel 28 is in contact with the surface of the slide rod 27, a scraper 29 is fixedly installed on the surface of the swivel 28, the surfaces of the first electrode 5 and the second electrode 6 are in contact with the scraper 29, the slide rod 27, the swivel 28 and the scraper 29 are all made of insulating material, and when the telescopic rod 18 rotates, it pushes the baffle 25 to move, and the moving baffle 25 drives the linkage disk 24 to rotate.

[0034] The shape of the scraper 29 matches the cross-sectional profile of the first electrode 5 and the second electrode 6 . The scraper 29 scrapes away dust attached to the surfaces of the first electrode 5 and the second electrode 6 when rotating, thereby ensuring conductivity between the first electrode 5 and the second electrode 6 .

[0035] Clamp the fixing clip 12 on the surface of the transmission line to be protected, so that the transmission line is connected to the connecting line 9, and the transmission line is connected to the top terminal 2 of the protector through the connecting line 9. When an overvoltage is generated in the transmission line due to improper operation, the voltage will break through the gap between the first electrode 5 and the second electrode 6, forming a conductive channel between the first electrode 5 and the second electrode 6. At the same time, the strong voltage causes the resistance of the resistor 3 in the shell 1 to decrease sharply, and the current generated by the overvoltage is instantly introduced into the ground through the grounding terminal 4, thereby preventing the overvoltage generated in the transmission line from damaging the line and electrical equipment. In addition, the connecting wire 9 is fixed to the socket 7 and connected to the terminal 2 through the insertion strip 8. The insertion strip 8 is inserted into the socket 7, and then the protective cover 10 is put on the surface of the socket 7 to fix the connecting wire 9. The modular design between the connecting wire 9 and the protector is convenient for installation and disassembly. When there is a problem with the protector, it is convenient for the staff to check the connecting wire 9 and the shell 1 separately to eliminate the root cause of the problem. Different types of connecting wires 9 can be selected according to different working conditions and conductive standards of the protector. After the connecting wire 9 is connected to the power line, the excess part of the connecting wire 9 can be wrapped around the surface of the wire clamping block 17 to avoid the excess part of the connecting wire 9 from being entangled and knotted, which may cause a short circuit in the line and ignite the power line, causing a fire. When the connecting wire 9 needs to be removed, the push rod 16 on the surface of the fixing plate 14 is moved to release the limit on the wire clamping block 17. The wire clamping block 17 contracts under the elastic force of the elastic member, releasing the connecting wire 9 stuck on the surface.

[0036] Before the protector works, the position of the protector can be adjusted so that the protector can work safely and stably. The fixing ring 19 is moved to push the housing 1 to move the housing 1 to the working area. At the same time, the housing 1 can be further adjusted by moving it in the fixing ring 19 so that the protector can be accurately moved to the designated working area. When the housing 1 moves, it will drive the telescopic rod 18 to telescope and rotate. When the telescopic rod 18 rotates, it will push the baffle 25 to move. The moving baffle 25 drives the linkage disk 24 to rotate. The rotating linkage disk 24 drives the top ball 26 to move. The moving top ball 26 lifts the slide bar 27, and under the elastic force of the second spring, the slide bar 27 slides up and down. The surface of the sliding slide bar 27 contacts and rubs with the surface of the rotating ring 28, pushing the rotating ring 28 to rotate. The rotating rotating ring 28 drives the scraper 29 to rotate, scraping off the dust and attachments on the surface of the first electrode 5 and the second electrode 6 to avoid affecting the conductivity between the first electrode 5 and the second electrode 6, which causes the protector to fail to protect the line normally. After the housing 1 has completed its movement, the sliding sealing cover 21 closes the air hole 20, blocking the cavity in the fixing ring 19. Since the fixed end of the telescopic rod 18 cannot enter or exhaust the cavity, the free end of the telescopic rod 18 cannot extend or retract, and the telescopic rod 18 cannot rotate within the fixing ring 19, thereby securing and supporting the housing 1. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fixed gap overvoltage protector, comprising a housing (1) and a terminal (2), characterized in that: The terminal (2) is fixedly mounted on the top of the housing (1) and passes through the housing (1); the housing (1) is made of an insulating material; a first electrode (5) is fixedly mounted on the surface of the terminal (2), and the first electrode (5) passes through the housing (1); a resistor (3) is fixedly mounted inside the housing (1); the resistance value inside the resistor (3) is inversely proportional to the voltage; a second electrode (6) is fixedly mounted on the surface of the resistor (3), and the second electrode (6) passes through the housing (1); a ground terminal (4) is fixedly mounted on the bottom of the resistor (3); the terminal (2) A socket (7) is fixedly installed on the top, an inserting strip (8) is provided in the socket (7), the socket (7) and the inserting strip (8) are conductive, a protective cover (10) is sleeved on the surface of the socket (7), a connecting wire (9) is fixedly installed on the top of the inserting strip (8), a steering block (11) is rotatably installed on one end of the connecting wire (9) away from the inserting strip (8), a fixing clamp (12) is rotatably installed on the surface of the steering block (11), the inner wall of the fixing clamp (12) is provided with vertical lines (13), and the steering block (11) and the fixing clamp (12) are conductive.

2. The fixed gap overvoltage protector according to claim 1, characterized in that: A fixing plate (14) is fixedly mounted on the top of the housing (1), a plurality of fixing rods (15) are fixedly mounted on the surface of the fixing plate (14), a plurality of wire clamping blocks (17) are slidably mounted on the surface of each fixing rod (15), an elastic member is provided between the wire clamping block (17) and the fixing rod (15), a slot (171) is provided on the surface of the wire clamping block (17), a push rod (16) is slidably mounted on the surface of the fixing plate (14), a first spring is provided between the push rod (16) and the fixing plate (14), the surface of the push rod (16) contacts the bottom of the wire clamping block (17), and an inclined surface is provided on one end of the push rod (16) away from the fixing plate (14).

3. The fixed gap overvoltage protector according to claim 1, characterized in that: The resistor (3) is made of zinc oxide as a main material, and the first electrode (5) and the second electrode (6) are aligned.

4. The fixed gap overvoltage protector according to claim 1, characterized in that: The surface of the connecting wire (9) is wrapped by an insulating rubber sleeve.

5. The fixed gap overvoltage protector according to claim 4, characterized in that: The bottom of the housing (1) is provided with a base (23), the bottom of the base (23) is provided with a support frame, the support frame is conductive, the bottom grounding terminal (4) of the resistor (3) is connected to the support frame inside the base (23), the base (23) is insulated as a whole, a slide rail (22) is fixedly installed on the top of the base (23), a fixed ring (19) is slidably installed on the surface of the slide rail (22), a plurality of telescopic rods (18) are rotatably installed on the inner wall of the fixed ring (19), the free ends of the telescopic rods (18) are hinged to the bottom of the housing (1), a cavity is provided inside the fixed ring (19), an air hole (20) is opened on the surface of the fixed ring (19), a sealing cover (21) is slidably installed on the surface of the fixed ring (19) near the air hole (20), and the air hole (20) and the fixed end of the telescopic rod (18) are connected in the cavity inside the fixed ring (19).

6. The fixed gap overvoltage protector according to claim 5, characterized in that: The outer wall of the free end of the telescopic rod (18) and the inner wall of the fixed end are tightly fitted.

7. The fixed gap overvoltage protector according to claim 1, characterized in that: A linkage disk (24) is rotatably mounted on the surface of the housing (1), a first torsion spring is provided between the linkage disk (24) and the housing (1), a plurality of blocking rods (25) are fixedly mounted on the bottom of the linkage disk (24), a top ball (26) is fixedly mounted on the top of the linkage disk (24), a slide rod (27) is slidably mounted on the surface of the housing (1), a second spring is provided between the slide rod (27) and the housing (1), the bottom of the slide rod (27) contacts the surface of the top ball (26), two rotating rings (28) are rotatably mounted on the surface of the housing (1), a second torsion spring is provided between the rotating ring (28) and the housing (1), the outer wall of the rotating ring (28) contacts the surface of the slide rod (27), a scraper (29) is fixedly mounted on the surface of the rotating ring (28), the surfaces of the first electrode (5) and the second electrode (6) are both in contact with the scraper (29), and the slide rod (27), the rotating ring (28) and the scraper (29) are all made of insulating material.

8. The fixed gap overvoltage protector according to claim 7, characterized in that: The shape of the scraper (29) matches the cross-sectional profile of the first electrode (5) and the second electrode (6).

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