Open type Rogowski coil discharge detection calipers

Abstract

The utility model discloses a pair of open type Rogowski coil discharge detection calipers, relates to the field of alternating current detection, and aims to solve the problems that an existing Rogowski coil cannot be installed remotely to reduce the risk of electric shock and the measurement precision is not up to the standard due to the fact that the Rogowski coil is easy to deform due to extrusion during measurement. The clamp comprises a clamp body, a fixed clamp and a movable clamp, the fixed clamp is fixed to the upper end of the clamp body, and the movable clamp is slidably connected to the clamp body; a Rogowski coil I is installed in the fixed clamp, a fixed contact is arranged at the upper end of the fixed clamp, the Rogowski coil I is connected with the fixed contact, a Rogowski coil II is installed in the movable clamp, a movable contact is arranged at the upper end of the movable clamp, the Rogowski coil II is connected with the movable contact, and the movable contact can be connected with the fixed contact in an inserted mode. The method is used for detecting the current of the alternating current line.

Description

Technical Field

[0001] The utility model relates to the field of alternating current detection, in particular to an open-type Rogowski coil discharge detection caliper. Background Art

[0002] Continuous advancements in power supply systems have led to a growing demand for current detection devices. Rogowski coils are a new type of sensor. They detect high-frequency signals in partial discharges, while integrators detect low-frequency signals. The detected signals are then displayed on an oscilloscope, completing partial discharge signal detection. Rogowski coils are suitable for testing existing power cables. They can be installed on the cable itself near cable terminals or intermediate joints. Their measurement circuits have no direct electrical connection to the high-voltage cable, offering advantages such as safety, flexibility, and ease of operation. They also offer improved interference immunity compared to grounded sensors.

[0003] However, most existing Rogowski coils are flexible ring structures. During use, the Rogowski coil ring needs to be opened and placed in the primary conductor to be measured. The Rogowski coil must then be connected before current measurement can be performed. When measuring a primary conductor with imperfect insulation protection, there is a risk of electric shock when installing the Rogowski coil. In addition, during measurement, it is necessary to ensure that the primary conductor to be measured is in the center of the Rogowski coil. Existing Rogowski coils are easily deformed due to squeezing during measurement, resulting in substandard measurement accuracy. Utility Model Content

[0004] In order to solve the problems of existing Rogowski coils that the coils cannot be installed at a distance to reduce the risk of electric shock and that the Rogowski coils are easily deformed due to extrusion during measurement, resulting in substandard measurement accuracy, the utility model provides an open-type Rogowski coil discharge detection caliper to solve the problems raised in the above background technology.

[0005] The technical solution of the utility model is:

[0006] An open-type Rogowski coil discharge detection caliper comprises a caliper body, a fixed caliper and a movable caliper. The fixed caliper is fixed on the upper end of the caliper body, and the movable caliper is slidably connected to the caliper body.

[0007] A Rogowski coil I is installed in the fixed clamp, a fixed contact is provided at the upper end of the fixed clamp, and the Rogowski coil I is connected to the fixed contact; a Rogowski coil II is installed in the movable clamp, a movable contact is provided at the upper end of the movable clamp, and the Rogowski coil II is connected to the movable contact, and the movable contact can be plugged into the fixed contact;

[0008] Furthermore, a closing handle is rotated inside the pliers body, the closing handle passes through the lower end of the pliers body, a shift rod is provided at the lower end of the movable pliers, a slot rod is provided at the upper end of the closing handle, and the lower end of the shift rod slides in the slot rod.

[0009] Further, the pincer body is provided with a limiting ring, the closing handle is provided with a rotating shaft, the rotating shaft is rotationally connected in the limiting ring, a torsion spring is arranged between the limiting ring and the rotating shaft, and the torsion spring makes the rotating shaft have a tendency to rotate clockwise.

[0010] Further, the fixed pincer and the movable pincer are semicircular rings with equal inner diameter and outer diameter, and the movable pincer can rotate concentrically relative to the fixed pincer.

[0011] Further, the pincer body is provided with a sliding groove, and the movable pincer is slidingly connected in the sliding groove.

[0012] Further, the lower end of the pincer body is provided with an opening, the closing handle extends out to the lower end of the pincer body through the opening, and the closing handle is provided with a cylindrical dustproof part.

[0013] Further, the fixed pincer and the movable pincer are provided with support skeletons, and the Rogowski coil I and the Rogowski coil II are respectively wound in the corresponding support skeletons.

[0014] Further, the lower end of the pincer body is provided with a holding handle.

[0015] Further, one side of the holding handle close to the closing handle is provided with a travel switch.

[0016] Further, the lower end of the holding handle is provided with a wire joint.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. An open type Rogowski coil discharge detection caliper is provided with a fixed pincer and a movable pincer, the fixed pincer and the movable pincer are provided with a Rogowski coil, the movable pincer rotates relative to the fixed pincer to complete the connection and disconnection of the Rogowski coil, the fixed pincer and the movable pincer support the Rogowski coil, the Rogowski coil keeps annular during measurement, and then the measured primary conductor can be arranged in the center of the Rogowski coil, so that the precision of current measurement is ensured.

[0019] 2. The lower part of the fixed pincer and the movable pincer is provided with a holding handle and a closing handle, the closing handle only needs to be pressed during measurement, the connection of the Rogowski coil can be completed, the Rogowski coil does not need to be held to pass the measured primary conductor to complete the connection of the Rogowski coil, and the holding handle and the fixed caliper and the movable caliper are provided with a safe distance, so that the safety is greatly improved when detecting exposed or insulated exposed wires. DRAWINGS

[0020] Figure 1 It is a structure diagram of the open type Rogowski coil discharge detection caliper closing body. Figure I ;

[0021] Figure 2Structure diagram of open type Rogowski coil discharge detection caliper opening body;

[0022] Figure 3 Structure diagram of open type Rogowski coil discharge detection caliper closing body Figure II ;

[0023] Figure 4 Structure diagram of open type Rogowski coil discharge detection caliper inside;

[0024] Figure 5 Explosion diagram of open type Rogowski coil discharge detection caliper;

[0025] Figure 6 Partial enlarged view of the structure of the slot lever and the slot rod;

[0026] Figure 7 Longitudinal sectional view of the fixed caliper;

[0027] Figure 8 Structure diagram of Rogowski coil I;

[0028] Figure 9 Structure diagram of the movable caliper;

[0029] Figure 10 Longitudinal sectional view of the movable caliper.

[0030] In the figure: 101, caliper body; 102, fixed caliper; 103, Rogowski coil I; 104, fixed contact; 105, movable caliper; 106, Rogowski coil II; 107, movable contact; 201, closing handle; 202, lever; 203, slot rod; 206, limiting ring; 204, rotating shaft; 108, sliding groove; 205, dust blocking part; 109, support framework; 301, holding handle; 401, travel switch; 501, wire joint. DETAILED DESCRIPTION

[0031] Specific implementation one: refer to Figure 1 and 7 -10, an open type Rogowski coil discharge detection caliper, the embodiment includes caliper body 101, fixed caliper 102 and movable caliper 105, the upper end of caliper body 101 is fixed with fixed caliper 102, and caliper body 101 is slidably connected with movable caliper 105;

[0032] Rogowski coil I 103 is installed in fixed caliper 102, the upper end of fixed caliper 102 is provided with fixed contact 104, Rogowski coil I 103 is connected with fixed contact 104, Rogowski coil II 106 is installed in movable caliper 105, the upper end of movable caliper 105 is provided with movable contact 107, Rogowski coil II 106 is connected with movable contact 107, and movable contact 107 can be inserted with fixed contact 104.

[0033] Specific implementation two: see Figures 1-3 As shown in the drawings, the fixed jaw 102 and the movable jaw 105 of the embodiment are semicircular rings with equal inner and outer diameters, and the movable jaw 105 can rotate concentrically relative to the fixed jaw 102.

[0034] Specific implementation three: see Figure 4 As shown in the drawings, the jaw body 101 of the embodiment is provided with a sliding groove 108, and the movable jaw 105 is slidingly connected in the sliding groove 108.

[0035] Specific implementation four: see Figures 7-10 As shown in the drawings, the fixed jaw 102 and the movable jaw 105 of the embodiment are provided with a support skeleton 109, and the Rogowski coil I 103 and the Rogowski coil II 106 are wound in the corresponding support skeleton 109.

[0036] Further, the jaw body 101 is a square hollow structure, the left upper end of which is fixed with the fixed jaw 102, and the right upper end of which is provided with a square opening, and the movable jaw 105 is withdrawn into the jaw body 101 through the square opening. The upper end of the jaw body 101 is provided with an arc-shaped part, and the inside of the jaw body 101 is provided with a group of flanges, and the arc-shaped part of the upper end of the jaw body 101 and the flanges form a sliding groove 108, which is used to limit the movable jaw 105, so that the movable jaw 105 can only rotate concentrically relative to the fixed jaw 102 in the sliding groove 108. The support skeleton 109 is made of non-magnetic material, and the Rogowski coil I 103 and the Rogowski coil II 106 are wound in the same direction on the corresponding support skeleton 109. The fixed jaw 102 and the movable jaw 105 are both made of plastic material, which plays a supporting and insulating role. The fixed contact 104 is arranged on the inner side of the upper end of the fixed jaw 102, and the fixed contact 104 is connected with the Rogowski coil I 103. The movable contact 107 is arranged on the outer side of the upper end of the movable jaw 105, and the movable contact 107 is connected with the Rogowski coil II 106. The upper end of the fixed jaw 102 is provided with an opening through which the movable contact 107 can move. When the movable jaw 105 rotates clockwise, the movable jaw 105 and the fixed jaw 102 are closed, at this time the movable contact 107 is inserted into the fixed contact 104, the Rogowski coil I 103 and the Rogowski coil II 106 are connected, and the connection of the Rogowski coil is completed to measure the work; when the movable jaw 105 rotates counterclockwise, the movable jaw 105 and the fixed jaw 102 are separated, at this time the movable contact 107 and the fixed contact 104 are disconnected, the Rogowski coil I 103 and the Rogowski coil II 106 are disconnected, and the Rogowski coil is disassembled from the measured conductor.

[0037] Further, the embodiment sets the fixed clamp 102 and the movable clamp 105, and sets the Rogowski coil I 103 and the Rogowski coil II 106 in the fixed clamp 102 and the movable clamp 105 respectively, so that the fixed clamp 102 and the movable clamp 105 support the Rogowski coil I 103 and the Rogowski coil II 106, and the coils keep annular during measurement, and then the measured primary conductor can be placed in the center of the Rogowski coil, so as to ensure the accuracy of current measurement.

[0038] Specific implementation five: see Figures 1-6 As shown in the figure, the embodiment has a closing handle 201 rotating in the clamp body 101, the closing handle 201 passes through the lower end of the clamp body 101, the lower end of the movable clamp 105 is provided with a push rod 202, the upper end of the closing handle 201 is provided with a slot rod 203, and the lower end of the push rod 202 slides in the slot rod 203.

[0039] Specific implementation six: see Figures 5-6 As shown in the figure, the embodiment has a limiting ring 206 arranged in the clamp body 101, a rotating shaft 204 arranged on the closing handle 201, the rotating shaft 204 rotatingly connected in the limiting ring 206, and a torsional spring arranged between the limiting ring 206 and the rotating shaft 204, so that the rotating shaft 204 has a tendency to rotate clockwise.

[0040] Specific implementation seven: see Figures 5-6 As shown in the figure, the lower end of the clamp body 101 of the embodiment is provided with an opening, the closing handle 201 extends to the lower end of the clamp body 101 through the opening, and the closing handle 201 is provided with a cylindrical dustproof part 205.

[0041] Further, two limiting rings 206 are symmetrically arranged in the pliers body 101, the rotating shaft 204 rotates in the limiting ring 206, so that the closing handle 201 is rotatably connected to the pliers body 101, the push rod 202 is a symmetrical rod structure, a push shaft is arranged between the top ends of the push rod 202, a sliding groove is arranged in the center of the slot rod 203, the push shaft in the push rod 202 slides in the sliding groove in the slot rod 203, so that the slot rod 203 can rotate the push rod 202 when rotating around the rotating shaft 204. The limiting ring 206 and the rotating shaft 204 are provided with a torsion spring, and the movable pliers 105 is in an open state in the default state, and the torsion spring is used for resetting the closing handle 201 after being pressed to open. The lower end of the pliers body 101 is provided with an opening, and the cylindrical dust blocking part 205 is used for blocking the opening to prevent dust from entering the pliers body 101. When the closing handle 201 is pressed, the closing handle 201 drives the slot rod 203 to rotate clockwise around the rotating shaft 204, the slot rod 203 drives the push rod 202 to move to the left, and then the push rod 202 drives the movable pliers 105 to rotate counterclockwise, and the closing of the movable pliers 105 is completed; when the closing handle 201 is released after the measurement is completed, the torsion spring drives the closing handle 201 to rotate counterclockwise, the slot rod 203 drives the push rod 202 to move to the right, and then the push rod 202 drives the movable pliers 105 to rotate clockwise, and the opening reset of the movable pliers 105 is completed.

[0042] Specific embodiment eight: see Figures 1-3 As shown in the figure, the lower end of the pliers body 101 of the embodiment is provided with a holding handle 301.

[0043] Specific embodiment nine: see Figures 1-3 As shown in the figure, the side of the holding handle 301 close to the closing handle 201 is provided with a travel switch 401.

[0044] Specific embodiment ten: see Figures 1-3 As shown in the figure, the lower end of the holding handle 301 is provided with a wire joint 501.

[0045] Further, the travel switch 401 is connected with the RLC coil II 106, when the closing handle 201 is completely pressed, the travel switch 401 is triggered, the RLC coil II 106 is connected to the power supply, the movable contact 107 is not powered in the non-measurement state, only when the fixed pliers 102 and the movable pliers 105 are completely closed, the RLC coil is connected to the circuit.

[0046] Further, because the fixed clamp and the movable clamp are provided below with the holding handle and the closing handle, when measuring, only the closing handle needs to be pressed to complete the connection of the Rogowski coil, without the need to hold the Rogowski coil to bypass the measured conductor to complete the connection of the Rogowski coil, and the holding handle and the fixed clamp are provided with a safe distance from the movable clamp, which greatly improves the safety when detecting exposed or insulated exposed conductors.

Claims

1. An open-type Rogowski coil discharge detection caliper, characterized by: It comprises a clamp body (101), a fixed clamp (102) and a movable clamp (105); the fixed clamp (102) is fixed on the upper end of the clamp body (101); and the movable clamp (105) is slidably connected to the clamp body (101); A Rogowski coil I (103) is installed in the fixed clamp (102), a fixed contact (104) is provided at the upper end of the fixed clamp (102), and the Rogowski coil I (103) is connected to the fixed contact (104). A Rogowski coil II (106) is installed in the movable clamp (105), a movable contact (107) is provided at the upper end of the movable clamp (105), and the Rogowski coil II (106) is connected to the movable contact (107). The movable contact (107) can be plugged into the fixed contact (104).

2. The open-type Rogowski coil discharge detection caliper according to claim 1, characterized in that: A closing handle (201) is rotated in the pliers body (101), and the closing handle (201) passes through the lower end of the pliers body (101). A shifting rod (202) is provided at the lower end of the movable pliers (105), and a slot rod (203) is provided at the upper end of the closing handle (201). The lower end of the shifting rod (202) slides in the slot rod (203).

3. The open-type Rogowski coil discharge detection caliper according to claim 2, characterized in that: A limit ring (206) is provided in the pliers body (101), a rotating shaft (204) is provided on the closing handle (201), the rotating shaft (204) is rotatably connected in the limit ring (206), a torsion spring is provided between the limit ring (206) and the rotating shaft (204), and the torsion spring makes the rotating shaft (204) have a tendency to rotate clockwise.

4. The open-type Rogowski coil discharge detection caliper according to claim 1, characterized in that: The fixed clamp (102) and the movable clamp (105) are semicircular rings with equal inner and outer diameters, and the movable clamp (105) can rotate concentrically relative to the fixed clamp (102).

5. The open-type Rogowski coil discharge detection caliper according to claim 1, characterized in that: A sliding groove (108) is provided in the clamp body (101), and the movable clamp (105) is slidably connected in the sliding groove (108).

6. The open-type Rogowski coil discharge detection caliper according to claim 2, characterized in that: The lower end of the pliers body (101) is provided with an opening, and the closing handle (201) extends to the lower end of the pliers body (101) through the opening. The closing handle (201) is provided with a cylindrical dust shield (205).

7. The open-type Rogowski coil discharge detection caliper according to claim 1, characterized in that: A support frame (109) is provided in both the fixed clamp (102) and the movable clamp (105), and the Rogowski coil I (103) and the Rogowski coil II (106) are respectively wound in the corresponding support frame (109).

8. The open-type Rogowski coil discharge detection caliper according to claim 1, characterized in that: A gripping handle (301) is provided at the lower end of the pliers body (101).

9. The open-type Rogowski coil discharge detection caliper according to claim 8, characterized in that: A travel switch (401) is provided on one side of the holding handle (301) close to the closing handle (201).

10. The open-type Rogowski coil discharge detection caliper according to claim 8, characterized in that: A wire connector (501) is provided at the lower end of the gripping handle (301).

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