Cable shearing device for relay protection and using method thereof

Abstract

The invention discloses a cable shearing device for relay protection and a using method thereof, and relates to the technical field of relay protection. The device comprises a shell, and a fixing mechanism, a shearing mechanism and a cover turning mechanism are arranged on the shell; the fixing mechanism comprises a clamping assembly, a spring assembly and a limiting assembly. The clamping assembly comprises a first sliding groove formed in the shell. Through the fixing mechanism and the elasticity of a second spring and a first spring, a worker can insert a plurality of cables between clamping blocks, then pull and rotate a limiting rod to separate the limiting rod from the limiting of a first limiting block, and drive a rotating drum to rotate through the limiting rod to drive the clamping blocks to get close to each other to clamp the cables; and a limiting rod slides into a first limiting block to limit the limiting rod, limiting and fixing of the cable are completed, operation is simple and rapid, workers can conveniently and rapidly maintain and install the sheared cable, and the practicability of the device is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of relay protection, and in particular relates to a cable cutting device for relay protection and a use method thereof. Background Art

[0002] Cable cutting device for relay protection refers to a device specially used in relay protection system, especially in the case of power system failure, which is used for fault isolation and protection through cable cutting device. It is used in the protection process of power equipment, helping to quickly cut off the cable of the faulty part in the case of a fault, so as to ensure the safe and stable operation of the power system. Traditional fault isolation usually relies on the relay protection device to control the circuit breaker to cut off the faulty part of the circuit. The relay protection device can determine whether a fault occurs by monitoring electrical parameters, and start the circuit breaker to isolate the fault according to the set conditions. In order to isolate the faulty part more quickly and reliably when a power system fails, the cable cutting device came into being. It is mainly used in places where rapid fault isolation is required, such as distribution network, transmission line, substation, etc. In these places, once a cable fault occurs, the cutting speed of the traditional circuit breaker may not be fast enough, or the fault location cannot be accurately determined. The cable cutting device can ensure that the faulty part is immediately cut off, thereby avoiding the spread of the fault and reducing the impact on other equipment.

[0003] However, the structure of some cable cutting devices for relay protection is relatively simple. Bolts or cable ties are usually used to fix the outer periphery of the cable to facilitate cutting. When the cable fails and a short circuit occurs, personnel need to use tools to continuously rotate or cut the cable tie to remove the cable. The operation is cumbersome and inconvenient for personnel to quickly repair and maintain. Summary of the invention

[0004] The purpose of the present invention is to provide a cable cutting device for relay protection and a method of using the same. By providing a fixing mechanism, a worker can insert a number of cables between the clamping blocks, and then pull the rotating limit rod to disengage the limit rod from the limit of the first limit block, and drive the rotating drum to rotate by the limit rod to drive the clamping blocks to approach each other to clamp the cable, and then slide the limit rod into the first limit block to limit the limit rod, thereby completing the limit fixation of the cable, thereby solving the problem of usually using bolts or cable ties and other fixing objects to limit the periphery of the cable.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a cable cutting device for relay protection and a method for using the same, comprising a housing, wherein the housing is provided with a fixing mechanism, a cutting mechanism and a flip mechanism; The fixing mechanism includes a clamping assembly, a spring assembly and a limiting assembly, the clamping assembly includes a first slide groove opened on the inner wall of the shell, the inner wall of the first slide groove is fixedly connected with a guide rod, the outer wall of the guide rod is slidably connected with a plurality of receiving blocks, the sides of the receiving blocks close to each other are fixedly connected with a first spring, the sides of the receiving blocks close to each other are fixedly connected with a clamping block, and the inner wall of the shell is provided with a groove.

[0006] Furthermore, the spring assembly includes several receiving blocks whose front ends extend to the inner wall of the groove and are fixedly connected to two connecting blocks, the inner wall of the groove is rotatably connected to a rotating drum, the inner wall of the rotating drum is slidably connected to a first slider, and the front side of the first slider is fixedly connected to a second spring.

[0007] Furthermore, the end of the second spring is fixedly connected to the inner wall of the rotating drum, the front of the first sliding block is fixedly connected to a rectangular block, the front end of the rectangular block extends to the front of the shell and is slidably connected to the inner wall of the rotating drum.

[0008] Furthermore, the limiting assembly includes two limiting rods fixedly connected to the front end of the rectangular block, a plurality of first limiting blocks are fixedly connected to the front side of the shell, and two receiving rods are fixedly connected to the outer wall of the rotating drum.

[0009] Furthermore, the back sides of the two receiving rods are provided with limiting grooves, the inner walls of the two limiting grooves are slidably connected with second limiting blocks, and the ends of the two second limiting blocks are fixedly connected to the front side of the connecting block.

[0010] Furthermore, the shearing mechanism includes a motor fixedly connected to the inner wall of the shell, the inner wall of the shell is provided with a second slide groove, the inner wall of the second slide groove is rotatably connected to a bidirectional threaded rod, and the right end of the bidirectional threaded rod is fixedly connected to the output end of the motor.

[0011] Furthermore, the outer wall of the bidirectional threaded rod is threadedly connected to two sliders, and the sides of the two sliders close to each other are fixedly connected to cutters, and the outer walls of the two sliders are slidably connected to the inner wall of the second sliding groove.

[0012] Furthermore, the flip cover mechanism comprises a diversion groove formed on the inner wall of the shell, and the inner wall of the shell is fixedly connected with a hinge block.

[0013] Furthermore, a flip cover is hingedly connected to the outer wall of the hinge block, a handle is fixedly connected to the front of the flip cover, and a fixing plate is fixedly connected to the back of the shell.

[0014] The present invention has the following beneficial effects: By setting up a fixing mechanism, the elasticity of the second spring and the first spring is utilized. The staff can insert several cables between the clamping blocks, and then pull the rotating limit rod to disengage the limit rod from the limit of the first limit block, and the limit rod drives the rotating drum to rotate to drive the clamping blocks to approach each other to clamp the cables, and then slide the limit rod into the first limit block to limit the limit rod, thereby completing the limit fixation of the cable. The simple and quick operation facilitates the staff to quickly repair and install the cut cables, thereby improving the practicability of the device.

[0015] By setting up the shearing mechanism, the motor is used to drive the bidirectional threaded rod to rotate, and the reverse thread is used to drive the cutters to approach each other through the slider, so as to shear and separate the cables in the diversion trough. The simple, fast and automated drive can avoid circuit overload or short circuit of the cable transmission current, which may cause damage to subsequent electrical equipment, and to a certain extent further improve the practicability of the device.

[0016] By setting up a flap mechanism, a hinged flap using a hinged block and a flap is realized. The flap isolates the diverter trough and the two cutters, which can reduce the entry of external dust into the diverter trough and affect the cable power transmission to a certain extent, while avoiding direct contact between personnel and the cutters and causing scratches, thereby playing an auxiliary protective effect on the device and further improving the practicability of the device.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of a partial explosion of the present invention; Figure 4 It is a schematic diagram of the front cross-sectional structure of the present invention; Figure 5 It is a schematic diagram of a top-view cross-sectional structure of the present invention; Figure 6 for Figure 5 A schematic diagram of the enlarged structure at A in the middle; Figure 7 for Figure 5 A schematic diagram of the enlarged structure at B in the middle; Figure 8 for Figure 4 Schematic diagram of the enlarged structure at point C in the middle.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows: Shell; 2. Fixing mechanism; 3. Shearing mechanism; 4. Flip mechanism; 21. First slide groove; 22. Guide rod; 23. Accepting block; 24. First spring; 25. Clamping block; 26. Groove; 27. Connecting block; 28. Rotating drum; 29. ​​First slider; 210. Second spring; 211. Rectangular block; 212. Limiting rod; 213. First limiting block; 214. Accepting rod; 215. Limiting groove; 216. Second limiting block; 31. Motor; 32. Second slide groove; 33. Bidirectional threaded rod; 34. Sliding block; 35. Cutter; 41. Diverter groove; 42. Articulated block; 43. Flip; 44. Handle; 45. Fixing plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-8 As shown, the present invention is a cable cutting device for relay protection and a method of using the same, comprising a housing 1, on which a fixing mechanism 2, a cutting mechanism 3 and a flip mechanism 4 are arranged. The fixing mechanism 2 includes a clamping assembly, a spring assembly and a limit assembly. The clamping assembly includes a first slide groove 21 opened on the inner wall of the shell 1. The inner wall of the first slide groove 21 is fixedly connected with a guide rod 22. The outer wall of the guide rod 22 is slidably connected with a plurality of receiving blocks 23. The sides of the plurality of receiving blocks 23 close to each other are fixedly connected with a first spring 24. The sides of the plurality of receiving blocks 23 close to each other are fixedly connected with a clamping block 25. The inner wall of the shell 1 is provided with a groove 26.

[0023] Among them Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, the spring assembly includes a plurality of receiving blocks 23, the front ends of which extend to the inner wall of the groove 26 and are fixedly connected to two connecting blocks 27. The inner wall of the groove 26 is rotatably connected to a rotating cylinder 28, and the inner wall of the rotating cylinder 28 is slidably connected to a first slider 29. The front side of the first slider 29 is fixedly connected to a second spring 210. The end of the second spring 210 is fixedly connected to the inner wall of the rotating cylinder 28. The front side of the first slider 29 is fixedly connected to a rectangular block 211. The front end of the rectangular block 211 extends to the front of the housing 1. The surface is slidably connected to the inner wall of the rotating drum 28, the limiting assembly includes two limiting rods 212 fixedly connected to the front end of the rectangular block 211, a plurality of first limiting blocks 213 are fixedly connected to the front side of the shell 1, and two receiving rods 214 are fixedly connected to the outer wall of the rotating drum 28. The back sides of the two receiving rods 214 are provided with limiting grooves 215, and the inner walls of the two limiting grooves 215 are slidably connected to second limiting blocks 216, and the ends of the two second limiting blocks 216 are fixedly connected to the front side of the connecting block 27.

[0024] By setting up the fixing mechanism 2, the elasticity of the second spring 210 and the first spring 24 is utilized. The staff can insert several cables between the clamping blocks 25, and then pull the rotating limit rod 212 to disengage the limit rod 212 from the limit of the first limit block 213, and the limit rod 212 drives the rotating drum 28 to rotate, which can drive the clamping blocks 25 to approach each other to clamp the cables, and then slide the limit rod 212 into the first limit block 213 to limit the limit rod 212, thereby completing the limit fixation of the cable. The simple and quick operation facilitates the staff to quickly repair and install the cut cables, thereby improving the practicability of the device.

[0025] Among them Figure 3 , Figure 4 and Figure 8 As shown, the shearing mechanism 3 includes a motor 31 fixedly connected to the inner wall of the shell 1, a second slide groove 32 is opened on the inner wall of the shell 1, a bidirectional threaded rod 33 is rotatably connected to the inner wall of the second slide groove 32, the right end of the bidirectional threaded rod 33 is fixedly connected to the output end of the motor 31, and two sliders 34 are threadedly connected to the outer wall of the bidirectional threaded rod 33, and a cutter 35 is fixedly connected to the side where the two sliders 34 are close to each other, and the outer walls of the two sliders 34 are slidably connected to the inner wall of the second slide groove 32.

[0026] By setting up the shearing mechanism 3, the motor 31 is used to drive the bidirectional threaded rod 33 to rotate, and the reverse thread is used to drive the cutter 35 to approach each other through the slider 34, so that the cables in the diversion groove 41 are sheared and separated. The simple, fast and automated drive can avoid circuit overload or short circuit caused by the cable transmission current, which may cause damage to subsequent electrical equipment, and to a certain extent further improve the practicality of the device.

[0027] Among them Figure 2 and Figure 3 As shown, the flip cover mechanism 4 includes a diversion groove 41 opened on the inner wall of the shell 1, the inner wall of the shell 1 is fixedly connected with a hinge block 42, the outer wall of the hinge block 42 is hinged with a flip cover 43, the front of the flip cover 43 is fixedly connected with a handle 44, and the back of the shell 1 is fixedly connected with a fixing plate 45.

[0028] By setting up the flap mechanism 4, a hinged flap using the hinge block 42 and the flap 43 is realized. The flap 43 isolates the diverter trough 41 and the two cutters 35, which can reduce the entry of external dust into the diverter trough 41 to a certain extent to affect the cable power transmission, while avoiding direct contact between personnel and the cutter 35 to cause scratches, etc., thereby playing a protective auxiliary effect on the device and further improving the practicability of the device.

[0029] A specific application of this embodiment is: by setting the fixing mechanism 2, when it is necessary to fix the cable in the diverter groove 41 of the housing 1, the two limiting rods 212 are grasped to drive the rectangular block 211 to slide outward from the inside of the rotating drum 28, and at the same time, the two limiting rods 212 are separated from the limiting position of the first limiting blocks 213, so that the first slider 29 slides in the rotating drum 28 and compresses the second spring 210. At this time, the second spring 210 is in a compressed state, and then the rotating drum 28 is driven to rotate in the groove 26 by rotating the limiting rod 212 and the rectangular block 211, and the rotating drum 28 rotates to drive the receiving rod 2 14, the receiving rod 214 slides in the limiting groove 215 through the second limiting block 216 to drive the two connecting blocks 27 to be staggered and close to each other, wherein the upper connecting block 27 is fixedly connected to the front end of the receiving block 23 fixed to the left end of the plurality of first springs 24, and the lower connecting block 27 is fixedly connected to the front end of the receiving block 23 fixed to the right end of the plurality of first springs 24, so that the two connecting blocks 27 are staggered and close to each other, driving the receiving blocks 23 of the plurality of diverter grooves 41 to be close to each other under the limit of the guide rod 22, so that the receiving block 23 compresses the first spring 24, and drives the plurality of clamping blocks 25 to be close to each other The cable between the clamping blocks 25 is fixedly clamped, and then the rectangular block 211 is pushed to slide in the drum 28, and the two limiting rods 212 are slid between the two designated first limiting blocks 213 for limiting. At this time, the second spring 210 elastically recovers, and the two limiting rods 212 are released to complete the rotation limiting of the drum 28. At the same time, the drum 28 limits the sliding of the two connecting blocks 27 through the second limiting block 216, ensuring that the two clamping blocks 25 firmly clamp the cable, wherein the guide rod 22 is provided to limit the receiving block 23 and the first spring 24, realizing the use of the second spring 2 10 and the elasticity of the first spring 24, the staff can insert several cables between the clamping blocks 25, and then pull the rotating limit rod 212 to disengage the limit rod 212 from the limit of the first limit block 213, and drive the rotating drum 28 to rotate through the limit rod 212 to drive the clamping blocks 25 to approach each other to clamp the cables, and then slide the limit rod 212 into the first limit block 213 to limit the limit rod 212, completing the limit fixation of the cable. The simple and quick operation facilitates the staff to quickly repair and install the cut cables, thereby improving the practicability of the device.

[0030] By setting the shearing mechanism 3 and cooperating with the fixing mechanism 2 to complete the fixing and clamping of the cable, when the cable is short-circuited or overloaded, the starting motor 31 drives the bidirectional threaded rod 33 to rotate, and the two sliders 34 are respectively connected to the two reverse threads on the bidirectional threaded rod 33, so that the rotation of the bidirectional threaded rod 33 drives the two sliders 34 to slide in the second slide groove 32 close to each other along the thread, and the two sliders 34 approach each other and drive the cutters 35 thereon to approach each other, so as to cut and separate the cable, and avoid the harm of circuit problems affecting subsequent power consumption. The motor 31 is used to drive the bidirectional threaded rod 33 to rotate, and the reverse thread is used to drive the cutters 35 to approach each other through the sliders 34, so as to cut and separate the cable in the diverter groove 41. The simple, fast and automatic drive can avoid the damage of subsequent power equipment caused by circuit overload or short circuit of the cable transmission current, and further improve the practicality of the device to a certain extent.

[0031] By setting up the flap mechanism 4, when it is necessary to fix several cables on the housing 1, the staff can drive the flap 43 to flip around the hinge block 42 by grasping the handle 44 to expose the diverter slot 41. After that, the staff can insert several cable diverters into between the two clamping blocks 25 in turn. After the cables are fixed with the help of the fixing mechanism 2, the staff can use the several fixing holes on the fixing plate 45 to install the device in a specific distribution box or cable power place. The application range is wide, and the hinged flap using the hinge block 42 and the flap 43 is realized. The flap 43 isolates the diverter slot 41 and the two cutters 35. To a certain extent, it can reduce the entry of external dust into the diverter slot 41 to affect the cable transmission, and avoid direct contact with the cutter 35 to cause scratches, etc., which plays a protective auxiliary effect on the device and further improves the practicality of the device.

[0032] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0033] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cable cutting device for relay protection, comprising a housing (1), wherein the housing (1) is provided with a fixing mechanism (2), a cutting mechanism (3) and a flip mechanism (4), characterized in that: The fixing mechanism (2) comprises a clamping assembly, a spring assembly and a limiting assembly, wherein the clamping assembly comprises a first slide groove (21) provided on the inner wall of the housing (1), the inner wall of the first slide groove (21) being fixedly connected to a guide rod (22), the outer wall of the guide rod (22) being slidably connected to a plurality of receiving blocks (23), a first spring (24) being fixedly connected to one side of the plurality of receiving blocks (23) being close to one another, a clamping block (25) being fixedly connected to one side of the plurality of receiving blocks (23) being close to one another, and a groove (26) being provided on the inner wall of the housing (1).

2. A cable cutting device for relay protection according to claim 1, characterized in that: The spring assembly comprises a plurality of receiving blocks (23) whose front ends all extend to the inner wall of the groove (26) and are fixedly connected to two connecting blocks (27); a rotating cylinder (28) is rotatably connected to the inner wall of the groove (26); a first sliding block (29) is slidably connected to the inner wall of the rotating cylinder (28); and a second spring (210) is fixedly connected to the front face of the first sliding block (29).

3. A cable cutting device for relay protection according to claim 2, characterized in that: The end of the second spring (210) is fixedly connected to the inner wall of the rotating drum (28); the front side of the first sliding block (29) is fixedly connected to a rectangular block (211); the front end of the rectangular block (211) extends to the front side of the housing (1) and is slidably connected to the inner wall of the rotating drum (28).

4. A cable cutting device for relay protection according to claim 3, characterized in that: The limiting assembly comprises two limiting rods (212) fixedly connected to the front end of the rectangular block (211), a plurality of first limiting blocks (213) are fixedly connected to the front side of the housing (1), and two receiving rods (214) are fixedly connected to the outer wall of the rotating drum (28).

5. A cable cutting device for relay protection according to claim 4, characterized in that: The back sides of the two receiving rods (214) are provided with limiting grooves (215), the inner walls of the two limiting grooves (215) are slidably connected with second limiting blocks (216), and the ends of the two second limiting blocks (216) are fixedly connected to the front side of the connecting block (27).

6. A cable cutting device for relay protection according to claim 5, characterized in that: The shearing mechanism (3) comprises a motor (31) fixedly connected to the inner wall of the housing (1); the inner wall of the housing (1) is provided with a second slide groove (32); the inner wall of the second slide groove (32) is rotatably connected to a bidirectional threaded rod (33); the right end of the bidirectional threaded rod (33) is fixedly connected to the output end of the motor (31).

7. A cable cutting device for relay protection according to claim 6, characterized in that: The outer wall of the bidirectional threaded rod (33) is threadedly connected to two sliders (34), and a cutter (35) is fixedly connected to the sides of the two sliders (34) that are close to each other. The outer walls of the two sliders (34) are slidably connected to the inner wall of the second sliding groove (32).

8. A cable cutting device for relay protection according to claim 7, characterized in that: The flip cover mechanism (4) comprises a diversion groove (41) formed on the inner wall of the outer shell (1), and a hinge block (42) is fixedly connected to the inner wall of the outer shell (1).

9. A cable cutting device for relay protection according to claim 8, characterized in that: A flap (43) is hingedly connected to the outer wall of the hinge block (42); a handle (44) is fixedly connected to the front of the flap (43); and a fixing plate (45) is fixedly connected to the back of the housing (1).

10. A method for using a cable cutting device for relay protection, using the cable cutting device for relay protection according to claims 1-9, characterized in that: It includes the following steps: S1: When it is necessary to fix the cable in the shunt groove 41 of the housing 1, the two limiting rods 212 are grasped to drive the rectangular block 211 to slide outward from the inside of the rotating drum 28, and at the same time, the two limiting rods 212 are separated from the limiting positions of the first limiting blocks 213, so that the first slider 29 slides in the rotating drum 28 and compresses the second spring 210, and then the rotating drum 28 is driven to rotate in the groove 26 by rotating the limiting rod 212 and the rectangular block 211, and the rotating drum 28 rotates to drive the receiving rod 214, and the receiving rod 214 slides in the limiting groove 215 through the second limiting block 216 to drive the two connecting blocks 27 to be staggered and close to each other, and drive the plurality of clamping blocks 25 to be close to each other to fix and clamp the cables between the clamping blocks 25; S2: When the cable is short-circuited or overloaded, the start motor 31 drives the bidirectional threaded rod 33 to rotate, so that the bidirectional threaded rod 33 rotates and drives the two sliders 34 to slide in the second slide groove 32 along the thread, and the two sliders 34 move closer to each other and drive the cutters 35 thereon to move closer to each other, so as to shear and separate the cable; S3: The staff can grasp the handle 44 to drive the flip cover 43 to flip around the hinge block 42 to expose the diversion groove 41, and can use the multiple fixing holes on the fixing plate 45 to install the device in a specific distribution box or cable power place.

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