Secondary overvoltage protector of current transformer

Abstract

The utility model discloses a secondary overvoltage protector of a current transformer, and relates to the technical field of transformer safety. The device comprises a protector, a protection mechanism and two quick installation mechanisms are arranged on the protector, the protection mechanism comprises a rectangular plate arranged above the protector, an anti-collision block is arranged above the rectangular plate, two first fixing blocks are fixedly connected to the sides, close to each other, of the rectangular plate and the anti-collision block, and the two first fixing blocks are fixedly connected to the two sides of the anti-collision block. The multiple first fixing blocks are fixedly connected with two sliding rods, and the outer walls of the two sliding rods are each slidably connected with two sliding blocks. According to the secondary overvoltage protector, the protection mechanism is arranged, so that the problems that when an existing secondary overvoltage protector of the current transformer is used, the top of the protector is inconvenient to protect, and the top of the protector is easily subjected to accidental impact such as falling of maintenance tools and collision of other objects, so that a shell of the protector is broken and deformed are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the safety technical field of mutual inductor, especially, a kind of current transformer secondary overvoltage protector. BACKGROUND

[0002] With the continuous expansion of modern power system scale and the gradual improvement of voltage grade, as indispensable equipment in power system, the stable operation of current transformer is crucial to the safety of entire power grid, so current transformer secondary overvoltage protector is needed to protect it, to ensure the normal operation of current transformer.

[0003] But the current transformer secondary overvoltage protector of existing one is inconvenient to protect the top of protector when using, and its top is vulnerable to accidental impact such as maintenance tool falling, other object collision, thereby leading to the shell rupture, deformation of protector, even damaging its internal parts, resulting in the loss of protector function. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of current transformer secondary overvoltage protector, by setting protection mechanism, the shell rupture, deformation of current transformer secondary overvoltage protector of existing one is not convenient to protect the top of protector when using, and its top is vulnerable to accidental impact such as maintenance tool falling, other object collision, thereby leading to the problem.

[0005] To solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a kind of current transformer secondary overvoltage protector, including protector, protection mechanism and two quick installation mechanism are set on the protector;

[0007] The protection mechanism includes the rectangular plate being set above the protector, the upper portion of the rectangular plate is provided with anti-collision block, the side of the rectangular plate and anti-collision block being close to each other is fixedly connected with two fixed blocks one, a plurality of the fixed block one is fixedly connected with two slide rods, the outer wall of two the slide rods is slidably connected with two sliding blocks.

[0008] Further, the side of two the sliding blocks being away from each other is fixedly connected with spring one, the side of a plurality of the spring one being away from each other is fixedly connected with a plurality of fixed blocks one respectively, the side of a plurality of the sliding blocks being close to each other is hingedly provided with hinge rod.

[0009] Further, the side of a plurality of the hinge rods being away from each other is hingedly provided with two hinge blocks, the hinge block on the upper side is fixedly connected with anti-collision block, the hinge block on the lower side is fixedly connected with rectangular plate, the bottom of the rectangular plate is fixedly connected with two fixed blocks two.

[0010] Further, the quick installation mechanism comprises a rectangular box fixedly connected to the right side of the second fixing block on the left side, and the inner wall of the right side of the rectangular box is fixedly connected with an extension rod.

[0011] Further, the outer wall of the extension rod is sleeved with a second spring, the right side of the second spring is fixedly connected with the rectangular box, and a sliding groove is formed in the outer wall of the rectangular box.

[0012] Further, the left side of the extension rod is fixedly connected with a circular sliding block, the right side of the circular sliding block is fixedly connected with the second spring, the outer wall of the circular sliding block is fixedly connected with a button, the outer wall of the circular sliding block is in sliding connection with the rectangular box, the button extends out of the sliding groove, and the outer wall of the button is in sliding connection with the sliding groove.

[0013] Further, the left side of the button is fixedly connected with a limiting rod, the top of the protector is fixedly connected with a third fixing block, the limiting rod penetrates through the second fixing block and the third fixing block on the left side, and the limiting rod is in sliding connection with the second fixing block and the third fixing block.

[0014] The utility model has the following beneficial effects:

[0015] 1. By setting the protection mechanism, when the top of the protector is impacted, the front buffer structure is analyzed, the anti-collision block transmits the force to the hinged block, the hinged block disperses the force to the two hinged rods, the two hinged rods rotate to extrude the two sliding blocks, the two sliding blocks slide on the slide rod and extrude the two first springs, the two first springs are contracted, the impact force is buffered, the back buffer structure is analyzed, and the back buffer structure is similar to the front buffer structure, the two first springs on the back can absorb and disperse part of the impact force, so that the energy of the collision can be buffered when the top of the protector is impacted, the shell of the protector is prevented from being broken and deformed, and the internal electronic elements are prevented from being damaged due to the impact, so that the service life of the protector is prolonged.

[0016] 2、By setting the quick installation mechanism, the installation of the protection mechanism, first push the button, make it in the sliding groove to the right sliding, so that the sliding groove on the circular slider in the rectangular box to the right sliding, the circular slider extrusion spring two and telescopic rod, so that they two shrink, so that the circular slider drive the limit rod right, until the limit rod do into the rectangular box, similarly make another quick installation mechanism limit rod into the rectangular box, at this time will be fixed block two and fixed block three alignment, release the button, two limit rods will reset with two spring two rebound, through the sliding hole on the fixed block two and fixed block three, so that the rectangular plate and the protector connected, so that the installation personnel more quickly install the protection mechanism to the top of the current transformer secondary overvoltage protector, can greatly shorten the time required for the entire installation process, thereby improving the speed of large-scale power engineering construction or equipment update.

[0017] Of course, any product implementing the present application does not necessarily need to achieve all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0019] Figure 1 It is the overall structure schematic diagram of the present application;

[0020] Figure 2 It is the front side sectional structure schematic diagram of the present application;

[0021] Figure 3 It is the overall structure schematic diagram of the present application Figure 2 The enlarged structure schematic diagram of A;

[0022] Figure 4 It is the local sectional structure schematic diagram of the quick installation mechanism of the present application;

[0023] Figure 5 It is the overall structure schematic diagram of the present application Figure 4 The enlarged structure schematic diagram of B.

[0024] In the drawings, the component list represented by each number is as follows:

[0025] 1, protector; 2, protection mechanism; 211, rectangular plate; 212, anti-collision block; 213, fixed block one; 214, sliding rod; 215, sliding block; 216, spring one; 217, articulated rod; 218, articulated block; 219, fixed block two; 3, quick installation mechanism; 311, rectangular box; 312, telescopic rod; 313, spring two; 314, sliding groove; 315, circular sliding block; 316, button; 317, limiting rod; 318, fixed block three. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Please refer to Figures 1-5The utility model provides a current transformer secondary overvoltage protector, including protector 1, be provided with protection mechanism 2 and two quick installation mechanism 3 on protector 1, protection mechanism 2 includes the rectangular plate 211 of setting at protector 1 top, the top of rectangular plate 211 is provided with the crash block 212, rectangular plate 211 and crash block 212 mutually close one side fixedly connected with two fixed blocks one 213, a plurality of fixed blocks one 213 are fixedly connected with two slide rods 214, the outer wall of two slide rods 214 is slidably connected with two sliding blocks 215, a plurality of sliding blocks 215 mutually far side is fixedly connected with spring one 216, a plurality of spring one 216 mutually far side is fixedly connected with a plurality of fixed blocks one 213 respectively, a plurality of sliding blocks 215 mutually close one side all hinge settings have articulated rod 217, a plurality of articulated rod 217 mutually far side hinge settings have two articulated blocks 218, the articulated block 218 in the upper side is fixedly connected with crash block 212 and the articulated block 218 in the lower side is fixedly connected with rectangular plate 211, the bottom of rectangular plate 211 is fixedly connected with two fixed blocks two 219, by setting protection mechanism 2, can be in protector 1 top is impacted, the energy of buffering collision, to avoid the shell rupture of protector 1, deformation and the damage of internal electronic component due to impact, to prolong the service life of protector 1, quick installation mechanism 3 includes the rectangular box 311 of fixedly connected in the right side of fixed block two 219 in the left side, the right side inner wall of rectangular box 311 is fixedly connected with telescopic link 312, spring two 313 is set on the outer wall of telescopic link 312, the right side of spring two 313 is fixedly connected with rectangular box 311, the outer wall of rectangular box 311 is set with slide groove 314, the left side of telescopic link 312 is fixedly connected with circular sliding block 315, the right side of circular sliding block 315 is fixedly connected with spring two 313, the outer wall of circular sliding block 315 is fixedly connected with button 316, the outer wall of circular sliding block 315 is slidably connected with rectangular box 311, button 316 extends to the outside of slide groove 314, the outer wall of button 316 is slidably connected with slide groove 314, the left side of button 316 is fixedly connected with limit rod 317, limit rod 317, the top of protector 1 is fixedly connected with fixed block three 318, limit rod 317 passes through fixed block two 219 and fixed block three 318 in the left side, limit rod 317 is slidably connected with fixed block two 219 and fixed block three 318, by setting quick installation mechanism 3, the installation personnel can more quickly install protection mechanism 2 to the top of current transformer secondary overvoltage protector, can greatly shorten the time required in entire installation process, to improve the large-scale electric power engineering construction or equipment renewal speed.

[0028] One specific application of the embodiment is: in use, first place the protector 1 in the corresponding position, then start the installation of the protection mechanism 2, first push the button 316 to make it slide right in the sliding groove 314, so that the sliding groove 314 drives the circular slider 315 on it to slide right in the rectangular box 311, the circular slider 315 extrudes the spring two 313 and the telescopic rod 312, so that they are contracted, and then the circular slider 315 drives the limiting rod 317 to move right until the limiting rod 317 is retracted into the rectangular box 311, and the limiting rod 317 of the other quick installation mechanism 3 is retracted into the rectangular box 311 at the same time, at this time, the fixed block two 219 and the fixed block three 318 are aligned, the button 316 is released, and the two limiting rods 317 are reset with the rebound of the two spring two 313, through the sliding hole on the fixed block two 219 and the fixed block three 318, so that the rectangular plate 211 and the protector 1 are connected, when the top of the protector 1 is impacted, the protector 1 in the device is CHTK-CTB-1, and its working principle is: in normal operation, the secondary side of the current transformer is approximately short-circuited, the voltage is low, the CHTK-CTB-1 protector is connected in parallel between the two ends of the secondary protected winding, the core element is in a high resistance state, the leakage current is less than 1 mA, and the normal work of the transformer is not affected, when the secondary circuit is open or the primary winding has abnormal current, overvoltage is generated in the secondary winding, the thyristor of the protector is turned on instantaneously, the overvoltage is limited in a safe range, the secondary winding is short-circuited within 10 ms, at this time, the panel indicator light indicates the fault winding, the relay contact point outputs an alarm signal, and the differential protection contact point is also provided, the maintenance personnel checks the secondary circuit according to the indicator light, and after the fault is eliminated, the reset button is pressed, the indicator light is extinguished, and the device returns to normal; if the indicator light is still on after pressing, it indicates that the fault has not been eliminated, and further investigation is required, the analysis of the buffer structure on the front face is carried out, the buffer block 212 transmits the force to the hinged block 218, the hinged block 218 disperses the force to the two hinged rods 217, the two hinged rods 217 rotate to extrude the two sliders 215, the two sliders 215 slide on the slide rod 214 and extrude the two spring one 216, so that the two spring one 216 is contracted, and the impact force transmitted is buffered, the analysis of the buffer structure on the back face is carried out, and the buffer structure on the back face is similar to that on the front face. The two spring one 216 on the back face absorbs and disperses part of the impact force.

[0029] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description 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.

[0030] The preferred embodiments disclosed above are only used to help describe the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A current transformer secondary overvoltage protector characterized by: The utility model provides a protection device, including the protector (1), be provided with protection mechanism (2) and two quick installation mechanism (3) on the protector (1); The protection mechanism (2) includes a rectangular plate (211) arranged above the protector (1), an anti-collision block (212) arranged above the rectangular plate (211), two fixed blocks (213) fixedly connected to the side of the rectangular plate (211) and the anti-collision block (212) close to each other, two slide rods (214) fixedly connected to the fixed blocks (213), and two slide blocks (215) slidingly connected to the outer wall of the slide rods (214).

2. A current transformer secondary overvoltage protector according to claim 1, characterized in that The side of the slide blocks (215) away from each other is fixedly connected with a spring (216), the side of the spring (216) away from each other is fixedly connected with the fixed blocks (213), and the side of the slide blocks (215) close to each other is hingedly provided with a hinge rod (217).

3. A current transformer secondary overvoltage protector according to claim 2, characterised in that, The side of the hinge rods (217) away from each other is hingedly provided with two hinge blocks (218), the upper hinge block (218) is fixedly connected with the anti-collision block (212), and the lower hinge block (218) is fixedly connected with the rectangular plate (211); and the bottom of the rectangular plate (211) is fixedly connected with two fixed blocks (219).

4. A current transformer secondary overvoltage protector according to claim 3, characterised in that, The quick installation mechanism (3) includes a rectangular box (311) fixedly connected to the right side of the fixed block (219) on the left side; the right inner wall of the rectangular box (311) is fixedly connected with a telescopic rod (312).

5. A current transformer secondary overvoltage protector according to claim 4, characterised in that, The outer wall of the telescopic rod (312) is sleeved with a spring (313), the right side of the spring (313) is fixedly connected with the rectangular box (311), and the outer wall of the rectangular box (311) is provided with a sliding groove (314).

6. A current transformer secondary overvoltage protector according to claim 5, characterised in that, The left side of the telescopic rod (312) is fixedly connected with a circular slide block (315), the right side of the circular slide block (315) is fixedly connected with the spring (313), the outer wall of the circular slide block (315) is fixedly connected with a button (316), the outer wall of the circular slide block (315) is slidingly connected with the rectangular box (311), the button (316) extends out of the sliding groove (314), and the outer wall of the button (316) is slidingly connected with the sliding groove (314).

7. A current transformer secondary overvoltage protector according to claim 6, characterised in that, The left side of the button (316) is fixedly connected with a limiting rod (317), the top of the protector (1) is fixedly connected with a fixed block (318), the limiting rod (317) penetrates the fixed block (219) on the left side and the fixed block (318), and the limiting rod (317) is slidingly connected with the fixed block (219) and the fixed block (318).

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