Rapid detection device for circuit breaker

Abstract

A rapid detection device for a circuit breaker comprises circular pressure detection heads, and the rear side of each pressure detection head is connected with a pressure sensor. A support is further arranged. The support comprises a base and an upper seat body, the upper seat body is mounted above the base, and the vertical relative position between the base and the upper seat body is adjustable; a support plate is installed in front of the upper seat body, the support plate is fixedly connected with a longitudinal guide rod, the upper seat body is provided with a longitudinal guide cylinder, the longitudinal guide rod can be installed in the longitudinal guide cylinder in a longitudinal sliding mode, and the support plate and the longitudinal guide rod move synchronously; the number of the pressure detection heads is six, the six pressure detection heads and the corresponding pressure sensors are installed in front of the support plate and move along with the support plate, and the six pressure detection heads are arranged into an upper row, a lower row, a left column, a middle column and a right column. And an electric screw rod mechanism for driving the bracket plate to move longitudinally is also arranged in the upper seat body. According to the utility model, the contact pressure detection of the circuit breaker is time-saving and labor-saving, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of vacuum circuit breaker performance detection, and specifically relates to a circuit breaker rapid detection device. BACKGROUND

[0002] The circuit breaker in the power system realizes arc extinguishing and insulation by using a vacuum state. Figure 1 As shown, the circuit breaker is provided with three vacuum chambers 92 and six exposed plum blossom contacts 91, the three vacuum chambers 92 correspond to the ABC three-phase, the six plum blossom contacts 91 are arranged into two rows and three columns, the left, middle and right three columns of plum blossom contacts 91 correspond to the ABC three-phase of the circuit breaker respectively, and the upper and lower two plum blossom contacts 91 in each column correspond to the moving contact and the static contact in the vacuum chamber respectively; each plum blossom contact 91 comprises a plurality of contact fingers arranged in a uniform annular array, the outside of the contact finger is provided with pressure by a spring, and the external contact head inserted into the plum blossom contact is provided with centripetal pressure. According to the different distances between the contacts of the circuit breaker (i.e. the horizontal distance between the center points of the adjacent column contacts), the existing circuit breaker mainly has two common specifications, wherein the first kind is a 1250A circuit breaker, the distance between the contacts is 210mm, and the vertical distance between the upper and lower contacts in each column is 275mm; the second kind is a 3150A / 4000A circuit breaker, the distance between the contacts is 275mm, and the vertical distance between the upper and lower contacts in each column is 310mm.

[0003] The surface of the contact finger of the plum blossom contact is subjected to the impact of a large current, the erosion of dust and harmful gas for a long time in the use process, which often leads to poor contact of the contact finger and further generates the contact heating phenomenon, which not only affects the normal work of the contact finger, but also causes the performance degradation of the spring providing the pressure of the contact finger due to high heat, the reduction of the bound pressure, the increase of the contact resistance, the increase of the heating amount between the contacts caused by the increase of the contact resistance, and the vicious cycle of the continuous reduction of the contact stability; if the situation is not found and handled in time, the contact finger may be burned finally, and a production safety accident may be caused. Therefore, the pressure of the contact finger (referred to as the contact pressure) of the plum blossom contact of the circuit breaker needs to be detected regularly or irregularly. In addition, the resistance (referred to as the loop resistance) between the upper and lower two plum blossom contacts in each column of the circuit breaker also needs to be detected. In the prior art, when the loop resistance is detected, two wire clamps of the resistance detection circuit need to be clamped on the contact fingers of the upper and lower two plum blossom contacts to form an electrical connection, and the two wire clamps serve as two wire ends of the resistance detection circuit.

[0004] The patent document with the application publication number CN 118310665 A discloses a contact pressure testing device, which is provided with circular pressure detection heads, each of which comprises two half-circular detection blocks in pair cooperation, a deformation gap is formed between the two half-circular detection blocks, and a pressure sensor is connected to the rear end; when the pressure detection head is inserted into the center of each contact finger of the breaker wye contact, the contact pressure can be detected and read by the pressure sensor. However, the contact pressure testing device of CN 118310665 A still needs to rely on manpower to force the pressure detection head into the middle of the wye contact of each breaker one by one during use. The number of KYN switch cabinets configured in an ordinary substation is dozens at the least and hundreds at the most, and each KYN switch cabinet is provided with a breaker, and each breaker has six wye contacts, so all the wye contacts need to be detected, and therefore the operation amount of the detection process is large, the operation efficiency is low, and time and labor are wasted. Practical new type content

[0005] The utility model aims at overcoming the above-mentioned shortcoming and provides a circuit breaker rapid detection device, which can save time and labor for detecting the contact pressure of the circuit breaker and improve the detection efficiency.

[0006] The purpose can be achieved according to the following scheme: a circuit breaker rapid detection device, which comprises circular pressure detection heads, each of which is provided with two half-circular detection blocks in pair cooperation, a deformation gap is left between the two half-circular detection blocks, and a pressure sensor is connected to the rear side of each pressure detection head; characterized in that a support is further provided; the support comprises a base and an upper seat body, the upper seat body is installed above the base, and the vertical relative position between the base and the upper seat body is adjustable; a bracket plate is installed at the front of the upper seat body, the bracket plate is fixedly connected with a longitudinal guide rod, the upper seat body is provided with a longitudinal guide cylinder, the longitudinal guide rod is longitudinally and slidably installed in the longitudinal guide cylinder, and the bracket plate and the longitudinal guide rod move synchronously; the number of the pressure detection heads is six in total, the six pressure detection heads and the corresponding pressure sensors are installed in front of the bracket plate and move with the bracket plate, and the six pressure detection heads are arranged in two rows from top to bottom and three columns from left to right; an electric screw rod mechanism for driving the longitudinal movement of the bracket plate is further installed in the upper seat body.

[0007] Each pressure detection head is provided with a detection head base, and the rear end of the corresponding pressure sensor of each pressure detection head is fixedly connected with the corresponding detection head base; each detection head base is provided with a sliding block; the support plate is provided with six sliding rails, and the sliding block of each detection head base is installed on a corresponding sliding rail; the six sliding rails are arranged into two rows in the up-down direction and three columns in the left-middle-right direction; a clamping block is further arranged at the rear of each detection head base; the detection head base and the corresponding clamping block are respectively located on the front and rear sides of the support plate; the detection head base, the support plate and the clamping block are locked by longitudinal bolts and longitudinal nuts; a long strip-shaped bolt hole is further formed beside each sliding rail, the long strip-shaped bolt hole is parallel to the corresponding sliding rail in the length direction, and the length direction of the two sliding rails in the middle column is vertical, and the length direction of the other four sliding rails is inclined; the sliding rails in the left column and the sliding rails in the right column are symmetrical to each other, and the inclination angle of the sliding rails in the upper left column is different from that of the sliding rails in the lower left column; when the sliding blocks corresponding to the six pressure detection heads are located at the upper ends of the corresponding sliding rails, the six pressure detection heads are arranged into two rows in the up-down direction and three columns in the left-middle-right direction; when the sliding blocks corresponding to the six pressure detection heads are located at the lower ends of the corresponding sliding rails, the six pressure detection heads are also arranged into two rows in the up-down direction and three columns in the left-middle-right direction.

[0008] When the sliding blocks corresponding to the six pressure detection heads are located at the upper ends of the corresponding sliding rails, the vertical distance between the two rows of pressure detection heads is 310mm, and the horizontal distance between each two adjacent columns of pressure detection heads is 275mm; when the sliding blocks corresponding to the six pressure detection heads are located at the lower ends of the corresponding sliding rails, the vertical distance between the two rows of pressure detection heads is 275mm, and the horizontal distance between each two adjacent columns of pressure detection heads is 210mm.

[0009] The upper seat body is fixedly connected with four vertical bolts in the front-rear and left-right directions, vertical nuts are screwed on the vertical bolts, the vertical nuts are supported above the top surface of the base, and the lower end sections of the vertical bolts extend into the base.

[0010] The semicircular detection block of the pressure detection head is made of conductive metal; the upper and lower pressure detection heads in the same column are connected with a resistance detection circuit, and the upper and lower pressure detection heads are respectively used as two wiring ends of the resistance detection circuit.

[0011] The utility model has the advantages and effects that:

[0012] Firstly, the utility model utilizes the power of electric machinery to simultaneously insert the six pressure detection heads into the six contacts of the circuit breaker to detect the contact pressure, thereby saving time and effort, avoiding the fatigue of the detection personnel, and accelerating the detection speed and improving the detection efficiency;

[0013] Secondly, the utility model can adapt to detect two common specifications of circuit breakers, so for each specific transformer substation, only one detection device of the utility model needs to be configured to adapt to two different common distance circuit breaker contacts, reducing the detection equipment procurement demand.

[0014] Thirdly, the semicircular detection block of the pressure detection head is made of conductive metal, and the upper and lower pressure detection heads are respectively two wiring ends of the resistance detection circuit, so that in the process of detecting the contact pressure, the pressure detection head plunger contact forms an electrical connection, and the pressure detection head plays a role similar to the wiring clip of the traditional resistance detection circuit, so that the loop resistance of each phase plunger contact can be detected while detecting the contact pressure, reducing the wiring operation and further improving the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of a circuit breaker.

[0016] Figure 2 is a three-dimensional structural schematic diagram of a specific embodiment of the utility model.

[0017] Figure 3 is Figure 2 a three-dimensional view expressed from another angle.

[0018] Figure 4 is Figure 2 a front view schematic diagram of the structure.

[0019] Figure 5 is Figure 4 a cross-sectional view schematic diagram in A-A of the utility model.

[0020] Figure 6 is Figure 5 a local enlarged schematic diagram of B in the utility model.

[0021] Figure 7 is an exploded schematic diagram of the assembly relationship between the pressure detection head and the support plate.

[0022] Figure 8 is a cross-sectional schematic diagram of the support plate.

[0023] Figure 9 is a structural schematic diagram of the pressure detection head.

[0024] Figure 10 is Figure 7 an enlarged structural schematic diagram of the detection head base and the sliding block.

[0025] Figure 11 is a pressure detection head spacing schematic diagram when the sliding blocks of each pressure detection head are located on the upper end of the corresponding sliding rails.

[0026] Figure 12is a schematic diagram of the use state of the specific embodiment.

[0027] Figure 13 is Figure 12 is a schematic diagram of the support plate, pressure detection head, and breaker wrench contact in

[0028] Figure 14 is a schematic diagram of each pressure detection head sliding block being located at the lower end of the corresponding slide rail.

[0029] Figure 15 is a circuit schematic diagram of the upper and lower pressure detection heads of each column as two wiring ends of the resistance detection circuit.

[0030] Figure 16 is a schematic diagram of the two wiring ends of the resistance detection circuit being connected to the moving contact and the stationary contact inside the vacuum chamber to form a closed loop during detection. DETAILED DESCRIPTION

[0031] Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 9 A breaker rapid detection device is shown in the figure, which comprises a circular pressure detection head 1, each pressure detection head 1 is provided with a pressure sensor 30 and a pair of matched two semicircular detection blocks 11, a deformation gap 10 is left between the two semicircular detection blocks 11, and the rear side of the two semicircular detection blocks 11 is connected with the pressure sensor 30; a support 2 is also provided, which comprises a base 21 and an upper seat body 22, the upper seat body 22 is installed above the base 21; the vertical relative position between the base 21 and the upper seat body 22 is adjustable, specifically, the lower part of the upper seat body 22 is fixedly connected with four vertical bolts 71 in front and back and left and right, each vertical bolt 71 is screwed with a vertical nut 72, the vertical nut 72 is supported above the top surface of the base 21, and the lower end section of the vertical bolt 71 extends into the base 21, so that when the vertical nut 72 is twisted, the vertical position of the vertical bolt 71 and the upper seat body 22 moves slightly relative to the base 21; a support plate 3 is installed in front of the upper seat body 22, the support plate 3 is fixedly connected with a longitudinal guide rod 41, the upper seat body 22 is provided with a longitudinal guide cylinder 40, the longitudinal guide rod 41 is longitudinally and slidably installed in the longitudinal guide cylinder 40, and the support plate 3 and the longitudinal guide rod 41 move synchronously; the number of the pressure detection heads 1 is six in total, the six pressure detection heads 1 and the corresponding pressure sensors 30 are installed in front of the support plate 3 and move with the support plate 3, and the six pressure detection heads 1 are arranged in two rows and three columns.

[0032] Figure 5 , Figure 6 ,Figure 7 , Figure 8 , Figure 10 As shown, each pressure probe 1 is equipped with a probe base 6. The rear end of the pressure sensor 30 corresponding to each pressure probe 1 is fixedly connected to the corresponding probe base. Therefore, each pressure probe 1 is fixedly connected to the corresponding probe base 6 through the pressure sensor 30. Each probe base 6 is equipped with a slider 61, which is rectangular in shape and protrudes from the surface of the probe base 6. The support plate 3 is equipped with six slide rails 60. The slider 61 of each probe base is mounted on a corresponding slide rail 60. The slide rail 60 is a long, narrow hollow hole opened on the support plate 3. The slider 61 is embedded in the long, narrow hollow hole and can slide along the length of the hollow hole. Therefore, the long, narrow hollow hole forms the slide rail 60 of the slider 61. The six slide rails 60 are arranged in two rows and three columns, left, middle and right. Each probe base 6 A clamping block 7 is also provided at the rear. The probe base 6 and the corresponding clamping block 7 are located on the front and rear sides of the support plate 3, respectively. The probe base 6, the support plate 3 and the clamping block 7 are locked together by longitudinal bolts 81 and longitudinal nuts 80. Specifically, the probe base 6 is located on the front side of the support plate 3 and the clamping block 7 is located on the rear side of the support plate 3. When the longitudinal nut 80 on the longitudinal bolt 81 is tightened, the probe base 6 and the clamping block 7 clamp the support plate 3, so the installation position of the probe base 6 on the support plate 3 is fixed. When the longitudinal nut 80 on the longitudinal bolt 81 is loosened, the probe base 6 and the clamping block 7 no longer clamp the support plate 3. Therefore, the installation position of the probe base 6 (together with the clamping block 7, the pressure probe 1 and the pressure sensor 30) on the support plate 3 can be adjusted along the longitudinal direction of the slide rail 60. Each slide rail 60 is also provided with an elongated bolt hole 8 for the longitudinal bolt 81 to pass through. The longitudinal direction of the elongated bolt hole 8 is parallel to the longitudinal direction of the corresponding slide rail 60. In this way, when adjusting and changing the installation position of the probe base 6, the longitudinal bolt 81 can change its position accordingly along the longitudinal direction of the elongated bolt hole 8. Figure 4 , Figure 7 , Figure 8 As shown, the two slide rails 60 in the middle column are vertical in length, while the other four slide rails 60 are inclined in length; the slide rails 60 in the left column are symmetrical to the slide rails 60 in the right column, and the inclination angle of the slide rail in the upper left column is not equal to the inclination angle of the slide rail in the lower left column; specifically, in Figure 4 , Figure 8 In the middle, the tilt angle of the slide rail 60 located in the upper left column is greater than that of the slide rail 60 located in the lower left column. Since the slide rail 60 in the left column and the slide rail 60 in the right column are symmetrical, the tilt angle of the slide rail 60 located in the upper right column is also greater than that of the slide rail 60 located in the lower right column. Since the four slide rails 60 on the left and right are tilted and the tilt angles are different, when the horizontal spacing of each pressure probe 1 is adjusted, its vertical spacing will change accordingly.

[0033] When the six sliders 61 corresponding to the six pressure detecting heads 1 are all located at the upper end of the corresponding slide rails 60, the six pressure detecting heads 1 are arranged into two rows and three columns as shown in Figure 2 、 Figure 4 、 Figure 11 , the vertical distance between the two rows is 310mm, and the horizontal distance between the two adjacent columns is 275mm; this state is suitable for batch detection of 3150A / 4000A circuit breakers.

[0034] Figure 14 When the six sliders 61 corresponding to the six pressure detecting heads 1 are all located at the lower end of the corresponding slide rails 60, the six pressure detecting heads are also arranged into two rows and three columns, and the vertical distance between the two rows is 275mm, and the horizontal distance between the two adjacent columns is 210mm; this state is suitable for batch detection of 1250A circuit breakers.

[0035] The semicircular detection block 11 of the pressure detecting head is made of conductive metal; the upper and lower two pressure detecting heads 1 in the same column are connected with a resistance detection circuit, and the two pressure detecting heads 1 are respectively used as two wiring ends of the resistance detection circuit as shown in Figure 15 . The circuit breaker rapid detection device is also provided with a display screen for displaying the pressure detection results and the electrical detection results.

[0036] The use principle of the above embodiment is as follows:

[0037] Before batch detection of the circuit breakers, the distance between the pressure detecting heads 1 is adjusted according to the model of the batch circuit breakers (when the 3150A / 4000A circuit breakers are detected in batches, the distance is adjusted to the state shown in Figure 11 , and when the 1250A circuit breakers are detected in batches, the distance is adjusted to the state shown in Figure 14 ), the vertical position of the upper seat body 22 (including the support plate 3 and the pressure detecting heads 1) is adjusted by screwing the vertical nut 72, the circuit breakers are pushed in front of the circuit breaker rapid detection device of the embodiment by using the circuit breaker transfer trolley, the six pressure detecting heads 1 are respectively aligned with the six torx contacts 91 of the circuit breakers, then the electric screw rod mechanism 5 is started to drive the support plate 3 to move forward, the support plate 3 drives the six pressure detecting heads 1 (including the pressure sensor 30) to move forward, and the six pressure detecting heads 1 are respectively embedded in the center of the six torx contacts 91 as shown in Figure 12 、 Figure 13As shown, the contact pressure of the six contact springs is thus measured and the detection result is displayed on the screen; in addition, when the two pressure detection heads 1 of each column are embedded in the center of the corresponding upper and lower contact springs 91, the pressure detection heads 1 are connected to the upper and lower contact springs 91 as the wiring ends of the resistance detection circuit, so that the resistance detection circuit is connected to the static contact and the dynamic contact inside the vacuum chamber and forms a closed loop, as shown in Figure 16 As shown, the contact pressure of the six contact springs is thus measured and the detection result is displayed on the screen; in addition, when the two pressure detection heads 1 of each column are embedded in the center of the corresponding upper and lower contact springs 91, the pressure detection heads 1 are connected to the upper and lower contact springs 91 as the wiring ends of the resistance detection circuit, so that the resistance detection circuit is connected to the static contact and the dynamic contact inside the vacuum chamber and forms a closed loop, as shown in Figure 16 As shown, the contact pressure of the six contact springs is thus measured and the detection result is displayed on the screen; in addition, when the two pressure detection heads 1 of each column are embedded in the center of the corresponding upper and lower contact springs 91, the pressure detection heads 1

Claims

1. A quick detection device for circuit breaker, comprising a circular pressure detection head; each pressure detection head is provided with two half-circular detection blocks matched in pairs, a deformation gap is left between the two half-circular detection blocks, and a pressure sensor is connected to the rear side of the two half-circular detection blocks; characterized in that, The support comprises a base and an upper seat body, the upper seat body is installed above the base, and the vertical relative position between the base and the upper seat body is adjustable; a support plate is installed at the front of the upper seat body, the support plate is fixedly connected with a longitudinal guide rod, the upper seat body is provided with a longitudinal guide cylinder, the longitudinal guide rod is longitudinally and slidably installed in the longitudinal guide cylinder, and the support plate and the longitudinal guide rod move synchronously; the six pressure detection heads are installed at the front of the support plate and move synchronously with the support plate, and the six pressure detection heads are arranged in two rows and three columns.

2. The circuit breaker quick detection apparatus according to claim 1, wherein: Each pressure detection head is provided with a detection head base, the rear end of the corresponding pressure sensor of each pressure detection head is fixedly connected with the corresponding detection head base, each detection head base is provided with a sliding block, the support plate is provided with six slide rails, the sliding block of each detection head base is installed on a corresponding slide rail, the six slide rails are arranged in two rows and three columns, a clamping block is further arranged at the rear of each detection head base, the detection head base and the corresponding clamping block are located on the front and rear sides of the support plate respectively, the detection head base, the support plate and the clamping block are locked by longitudinal bolts and longitudinal nuts, a long strip-shaped bolt hole is further formed on the side of each slide rail for the longitudinal bolt to pass through, the long direction of the long strip-shaped bolt hole is parallel to the long direction of the corresponding slide rail, the long directions of the two slide rails in the middle column are vertical, the long directions of the remaining four slide rails are inclined, the slide rails in the left column and the slide rails in the right column are left-right symmetrical, the inclination angles of the slide rails in the upper left column are not equal to the inclination angles of the slide rails in the lower left column, when the sliding blocks corresponding to the six pressure detection heads are located at the upper ends of the corresponding slide rails, the six pressure detection heads are arranged in two rows and three columns, and when the sliding blocks corresponding to the six pressure detection heads are located at the lower ends of the corresponding slide rails, the six pressure detection heads are also arranged in two rows and three columns.

3. The circuit breaker quick detection apparatus according to claim 2, wherein: When the sliding blocks corresponding to the six pressure detection heads are located at the upper ends of the corresponding slide rails, the vertical distance between the two rows of pressure detection heads is 310 mm, and the horizontal distance between every two adjacent columns of pressure detection heads is 275 mm; when the sliding blocks corresponding to the six pressure detection heads are located at the lower ends of the corresponding slide rails, the vertical distance between the two rows of pressure detection heads is 275 mm, and the horizontal distance between every two adjacent columns of pressure detection heads is 210 mm.

4. The quick detection device of a circuit breaker according to claim 1 or 2, characterized in that: The semicircular detection blocks of the pressure detection heads are made of conductive metal; resistance detection circuits are connected between the upper and lower pressure detection heads in the same column, and the upper and lower pressure detection heads are respectively used as two wiring ends of the resistance detection circuit.

5. The quick detection device of a circuit breaker according to claim 1 or 2, characterized by: The lower part of the upper seat body is fixedly connected with four vertical bolts in front, back, left and right directions, vertical nuts are screwed on the vertical bolts, the vertical nuts are supported above the top surface of the base, and the lower end sections of the vertical bolts extend into the base.

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