CN112485658A - Handcart circuit breaker testing device - Google Patents
Handcart circuit breaker testing device Download PDFInfo
- Publication number
- CN112485658A CN112485658A CN202011268869.6A CN202011268869A CN112485658A CN 112485658 A CN112485658 A CN 112485658A CN 202011268869 A CN202011268869 A CN 202011268869A CN 112485658 A CN112485658 A CN 112485658A
- Authority
- CN
- China
- Prior art keywords
- insulating plate
- static contact
- strip
- current
- conducting strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
Abstract
The invention relates to a handcart circuit breaker testing device, which comprises: the first insulating plate, second insulating plate, supporting component and combination static contact subassembly. The above-mentioned scheme that this application provided, through adjusting the interval between first insulation board and the second insulation board, just can adjust the vertical distance between the combination static contact subassembly on the first insulation board and the combination static contact subassembly on the second insulation board, because the static contact subassembly homoenergetic of a plurality of combinations on the first insulation board and the second insulation board can follow perpendicular to supporting component axial displacement, thereby conveniently adjust the interval between the static contact subassembly of a plurality of combinations on the first insulation board and adjust the interval between the static contact subassembly of a plurality of combinations on the second insulation board, and then make the integrated device can be applicable to not unidimensional looks interval, the handcart circuit breaker of utmost point interval, the commonality has effectively been improved.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a handcart circuit breaker testing device.
Background
The 10kV handcart vacuum circuit breaker is widely applied to modern power grids, and in recent years, handcart vacuum circuit breakers are adopted in newly-put-into-production and technically-improved 10kV high-voltage cabinets, so that the occupation ratio is high. Daily detection of 10kV handcart circuit breaker, experimental project all can regard as the important judgement basis of the state evaluation of handcart circuit breaker, and wherein, experimental detection project mainly includes: mechanical property test, loop resistance test, withstand voltage test, insulation resistance test, and the like.
At present, because the staff is not enough to master the test method or is improper to test equipment operation, lead to test data unusual, inaccurate or even bury down latent hidden danger to the handcart circuit breaker, cause the misjudgement to the handcart circuit breaker state, bring unnecessary economic loss and equipment safety risk, simultaneously, because experimental detection device is not of uniform size, can not be applicable to the handcart circuit breaker of not unidimensional looks interval, utmost point interval, further brought inconvenience for staff's operation.
Disclosure of Invention
Therefore, it is necessary to provide a handcart circuit breaker testing device aiming at the problems that the existing testing device has poor universality and cannot be applied to handcart circuit breakers with different sizes, phase intervals and pole intervals.
The invention provides a handcart circuit breaker testing device, which comprises:
a first insulating plate;
a second insulating plate;
the first insulating plate and the second insulating plate are arranged on the supporting assembly, and the first insulating plate can move along the axial direction of the supporting assembly so as to adjust the distance between the first insulating plate and the second insulating plate;
the combined static contact assemblies are arranged on the first insulating plate and the second insulating plate and are perpendicular to the axial direction of the supporting assembly, and the combined static contact assemblies on the first insulating plate and the combined static contact assemblies on the second insulating plate can move along the axial direction of the supporting assembly.
Above-mentioned handcart circuit breaker test device, through adjusting the interval between first insulation board and the second insulation board, just can adjust the vertical distance between the combination static contact subassembly on the first insulation board and the combination static contact subassembly on the second insulation board, because the static contact subassembly homoenergetic of a plurality of combinations on the first insulation board and the second insulation board can follow perpendicular to supporting component axial displacement, thereby conveniently adjust the interval between the static contact subassembly of a plurality of combinations on the first insulation board and adjust the interval between the static contact subassembly of a plurality of combinations on the second insulation board, and then make the integrated device can be applicable to not unidimensional looks interval, the handcart circuit breaker of utmost point interval, the commonality has effectively been improved.
In one embodiment, the support assembly comprises a nut, a compression piece and two screws, wherein one end of each screw is provided with the nut, and the other end of each screw is provided with the compression piece;
the first insulating plate is arranged between the two screws, and the compression piece on each screw is matched with the first insulating plate and used for driving the first insulating plate to move axially along the screws;
the second insulating plate is arranged between the two screw rods and located below the first insulating plate, and one side, far away from the first insulating plate, of the second insulating plate is abutted to the nut on each screw rod.
In one embodiment, the compression element comprises an elastic element and an adjusting wheel, and the elastic element and the adjusting wheel are arranged on each screw rod;
the elastic piece is located between the first insulating plate and the second insulating plate, the regulating wheel is located one side of the first insulating plate far away from the second insulating plate, and the regulating wheel is in threaded connection with the screw.
In one embodiment, the support assembly further includes a first gasket and a second gasket, the first gasket and the second gasket are sleeved on the screw, one end of the elastic member abuts against the second insulating plate through the first gasket, and the other end of the elastic member abuts against the first insulating plate through the second gasket.
In one embodiment, the combined static contact assembly includes a first current static contact, a second current static contact, a conductive sheet and a fixing member, wherein the diameter of the first current static contact is larger than that of the second current static contact, and the second current static contact is arranged in the first current static contact;
the conducting strip on the first insulating plate is positioned between the first current fixed contact on the first insulating plate and the first insulating plate, the fixing piece on the first insulating plate is positioned on one side away from the first current fixed contact on the first insulating plate, and the fixing piece on the first insulating plate is connected with the second current fixed contact on the first insulating plate after penetrating through the first insulating plate and the conducting strip on the first insulating plate;
the conducting strip on the second insulating plate is located between the first current fixed contact on the second insulating plate and the second insulating plate, the fixing piece on the second insulating plate is located on the side away from the first current fixed contact on the second insulating plate, and the fixing piece on the second insulating plate penetrates through the conducting strips on the second insulating plate and then is connected with the second current fixed contact on the second insulating plate.
In one embodiment, the fixing piece comprises a hand wheel screw rod and a hand wheel;
one end of a hand wheel screw on the first insulating plate is connected with the hand wheel, and the other end of the hand wheel screw on the first insulating plate penetrates through the first insulating plate and a conducting strip on the first insulating plate and then is in threaded connection with a second current fixed contact on the first insulating plate;
one end of a hand wheel screw on the second insulating plate is connected with the hand wheel, and the other end of the hand wheel screw on the second insulating plate penetrates through the second insulating plate and a conducting strip on the second insulating plate and then is in threaded connection with a second current fixed contact on the second insulating plate.
In one embodiment, a plurality of first strip-shaped holes are formed in the first insulating plate and the second insulating plate along the direction perpendicular to the axial direction of the hand wheel screw, the first strip-shaped holes in the first insulating plate are located on the same horizontal line, and the first strip-shaped holes in the second insulating plate are located on the same horizontal line;
the other end of the hand wheel screw on the first insulating plate penetrates through the first strip-shaped hole on the first insulating plate and the conducting strip on the first insulating plate and then is in threaded connection with the second current static contact on the first insulating plate, and the hand wheel screw on the first insulating plate can move along the length direction of the first strip-shaped hole on the first insulating plate;
the other end of the hand wheel screw on the second insulating plate penetrates through a first strip-shaped hole on the second insulating plate and a conducting strip on the second insulating plate, the back of the conducting strip is in threaded connection with a second current static contact on the second insulating plate, and the hand wheel screw on the second insulating plate can move along the length direction of the first strip-shaped hole on the second insulating plate.
In one embodiment, a plurality of second strip-shaped holes are formed in the first insulating plate and the second insulating plate along the direction perpendicular to the axial direction of the hand wheel screw; the second strip-shaped hole on the first insulating plate is positioned below the first strip-shaped hole on the first insulating plate and is parallel to the first strip-shaped hole on the first insulating plate; the second strip-shaped hole on the second insulating plate is positioned below the first strip-shaped hole on the second insulating plate and is parallel to the first strip-shaped hole on the second insulating plate;
the combined static contact assembly further comprises a 6mm current banana socket and a 4mm voltage banana socket, a C-shaped conductive sheet upper section, a C-shaped conductive sheet lower section and a C-shaped conductive sheet middle section are arranged on the conductive sheet, the conductive sheet passes through the C-shaped conductive sheet upper section and penetrates through the second strip-shaped hole to be connected with the C-shaped conductive sheet middle section, one side, far away from the C-shaped conductive sheet upper section, of the C-shaped conductive sheet middle section is connected with the C-shaped conductive sheet lower section, the 6mm current banana socket and the 4mm voltage banana socket are both arranged on the C-shaped conductive sheet middle section, and the 6mm current banana socket is located below the 4mm voltage banana socket.
In one embodiment, the combined static contact assembly further includes a fastening member, the first current static contact is axially provided with a central hole, one end of the second current static contact facing the central hole is provided with an external thread, one end of the second current static contact facing the central hole is located in the central hole, the fastening member is in threaded connection with the external thread, and the fastening member is located in the first current static contact.
In one embodiment, a handle is arranged on one side of the first insulating plate, which faces away from the second insulating plate.
Drawings
Fig. 1 is a schematic structural diagram of a handcart circuit breaker testing device according to an embodiment of the invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a rear view of FIG. 1;
FIG. 4 is yet another rear view of FIG. 1;
FIG. 5 is yet another side view of FIG. 1;
fig. 6 is a schematic diagram of fig. 1 applied to a handcart circuit breaker.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1, in an embodiment of the present invention, a handcart circuit breaker testing apparatus is provided, including: the first insulating plate 10 and the second insulating plate 20 can both adopt epoxy resin plates, the first insulating plate 10 and the second insulating plate 20 are both arranged on the supporting component, and the first insulating plate 10 can move along the axial direction of the supporting component to adjust the distance between the first insulating plate 10 and the second insulating plate 20, meanwhile, a plurality of combined static contact components are arranged on the first insulating plate 10 and the second insulating plate 20 along the axial direction perpendicular to the supporting component, and the plurality of combined static contact components on the first insulating plate 10 and the plurality of combined static contact components on the second insulating plate 20 can move along the axial direction perpendicular to the supporting component.
Adopt above-mentioned technical scheme, through adjusting the interval between first insulation board and the second insulation board, just can adjust the vertical distance between the combination static contact subassembly on the first insulation board and the combination static contact subassembly on the second insulation board, because the static contact subassembly homoenergetic of a plurality of combinations on the first insulation board and a plurality of combinations on the second insulation board can be followed perpendicular to supporting component axial displacement, thereby conveniently adjust the interval between the static contact subassembly of a plurality of combinations on the first insulation board and adjust the interval between the static contact subassembly of a plurality of combinations on the second insulation board, and then make the integrated device can be applicable to not unidimensional looks interval, the handcart circuit breaker of utmost point interval, the commonality has effectively been improved.
In some embodiments, as shown in fig. 1, the support assembly herein comprises a nut 302, a compression member, and two threaded rods 30, each threaded rod 30 having a nut 302 at one end and a compression member at the other end; the first insulating plate 10 is arranged between the two screws 30, and a compression piece on each screw 30 is matched with the first insulating plate 10 and used for driving the first insulating plate 10 to move axially along the screws 30; the second insulating plate 20 is disposed between the two screws 30, the second insulating plate 20 is located below the first insulating plate 10, and one side of the second insulating plate 20 away from the first insulating plate 10 abuts against the nut 302 on each screw 30.
Further, the compressing element includes an elastic element 301 and an adjusting wheel 40, wherein each screw 30 is provided with the elastic element 301 and the adjusting wheel 40, the elastic element 301 is located between the first insulating plate 10 and the second insulating plate 20, the adjusting wheel 40 is located on one side of the first insulating plate 10 away from the second insulating plate 20, and the adjusting wheel 40 is in threaded connection with the screw 30.
Specifically, both ends of the first insulating plate 10 and the second insulating plate 20 are respectively provided with a through hole along the axial direction of the screw 30, the diameter of the through hole is larger than that of the screw 30, both ends of the screw 30 are respectively provided with an external thread, when assembling, firstly, the two screws 30 respectively pass through the through holes at both ends of the second insulating plate 20, then, each screw 30 is connected with a nut 302, and one side of the second insulating plate 20 far away from the first insulating plate 10 is abutted to the nut 302; then, each screw 30 is sleeved with an elastic member 301, such as a compression spring, the elastic member 301 is located between the first insulating plate 10 and the second insulating plate 20, at this time, the through holes at the two ends of the first insulating plate 10 are correspondingly inserted into the two screws 30, the first insulating plate 10 is located above the second insulating plate 20, and finally, the adjusting wheel 40 is in threaded connection with one end of each screw 30, which is far away from the nut 302.
When the vertical distance between the first insulating plate 10 and the second insulating plate 20 needs to be adjusted, only by rotating the adjusting wheel 40, the adjusting wheel 40 will move upward or downward along the axial direction of the screw 30, for example, when the adjusting wheel 40 rotates clockwise, the adjusting wheel will move downward along the axial direction of the screw 30, and at this time, the adjusting wheel 40 will drive the first insulating plate 10 to compress the elastic member 301, so that the vertical distance between the first insulating plate 10 and the second insulating plate 20 is reduced; when the adjustment wheel 40 rotates counterclockwise, it moves upward along the axial direction of the screw 30, and at this time, the elastic member 301 extends, and the first insulating plate 10 moves upward under the force of the elastic member 301, so that the vertical distance between the first insulating plate 10 and the second insulating plate 20 increases.
It should be noted that the structure of the compression member in the embodiment of the present application is only an example, and in other alternative solutions, other structures may also be adopted, for example, the compression member is an electric telescopic rod, and the first insulating plate is disposed on the electric telescopic rod. The present application does not specifically limit the specific structure of the compressing member as long as the above-described structure can achieve the object of the present application.
In some embodiments, as shown in fig. 2 in combination with fig. 1, in order to increase the stressed area of the elastic element 301 and protect the contact surface between the first insulating plate 10 and the elastic element 301 and the contact surface between the second insulating plate 20 and the elastic element 301 from being damaged, the support assembly in this application further includes a first gasket 303 and a second gasket 304, where the first gasket 303 and the second gasket 304 are both sleeved on the screw 30, one end of the elastic element 301 abuts against the second insulating plate 20 through the first gasket 303, and the other end abuts against the first insulating plate 10 through the second gasket 304.
In some embodiments, as shown in fig. 1 in combination with fig. 2, the combined stationary contact assembly in the present application includes a first current stationary contact 50, a second current stationary contact 60, a conductive sheet 70, and a fixing member, wherein a diameter of the first current stationary contact 50 is greater than a diameter of the second current stationary contact 60, and the second current stationary contact 60 is disposed in the first current stationary contact 50;
the conducting strip 70 on the first insulating plate 10 is located between the first current fixed contact 50 on the first insulating plate 10 and the first insulating plate 10, the fixing element on the first insulating plate 10 is located on the side away from the first current fixed contact 50 on the first insulating plate 10, and the fixing element on the first insulating plate 10 penetrates through the conducting strips 70 on the first insulating plate 10 and then is connected with the second current fixed contact 60 on the first insulating plate 10;
the conducting strip 70 on the second insulating plate 20 is located between the first current fixed contact 50 on the second insulating plate 20 and the second insulating plate 20, the fixing element on the second insulating plate 20 is located on a side away from the first current fixed contact 50 on the second insulating plate 20, and the fixing element on the second insulating plate 20 penetrates through the second insulating plate 20 and the conducting strip 70 on the second insulating plate 20 and then is connected to the second current fixed contact 60 on the second insulating plate 20.
Specifically, the combined static contact assembly includes six combined static contact assemblies, three of which are located on a first insulating plate 10, the other three of which are located on a second insulating plate 20, three first current static contacts 50 on the first insulating plate 10 are arranged on the first insulating plate 10 along an axial direction perpendicular to a screw 30, each first current static contact 50 is provided with one second current static contact 60, one side of each first current static contact 50 which is away from the first current static contact 50 on the first insulating plate 10 is provided with three fixing pieces, and each fixing piece on the first insulating plate 10 is connected with the second current static contact 60 on the first insulating plate 10 after penetrating through the first insulating plate 10 and a conducting strip 70 on the first insulating plate 10; the three first current fixed contacts 50 on the second insulating plate 20 are arranged on the second insulating plate 20 along an axial direction perpendicular to the screw 30, each first current fixed contact 50 is provided with one second current fixed contact 60, three fixing members are arranged on a side away from the first current fixed contacts 50 on the second insulating plate 20, and each fixing member on the second insulating plate 20 passes through the second insulating plate 20 and the conducting strip 70 on the second insulating plate 20 and then is connected with the second current fixed contact 60 on the second insulating plate 20.
In some embodiments, as shown in fig. 4 in conjunction with fig. 5, the fixture of the present application includes a hand wheel screw 80 and a hand wheel 90; one end of a handwheel screw 80 on the first insulating plate 10 is connected with a handwheel 90, and the other end of the handwheel screw 80 on the first insulating plate 10 penetrates through the first insulating plate 10 and a conducting strip 70 on the first insulating plate 10 and then is in threaded connection with a second current fixed contact 60 on the first insulating plate 10; one end of the hand wheel screw 80 on the second insulating plate 20 is connected to the hand wheel 90, and the other end of the hand wheel screw 80 on the second insulating plate 20 passes through the second insulating plate 20 and the conducting strip 70 on the second insulating plate 20 and then is in threaded connection with the second current fixed contact 60 on the second insulating plate 20.
Further, as shown in fig. 1, a plurality of first strip-shaped holes 103 are formed in the first insulating plate 10 and the second insulating plate 20 in the present application along the axial direction perpendicular to the hand wheel screw 80, the plurality of first strip-shaped holes 103 in the first insulating plate 10 are located on the same horizontal line, and the plurality of first strip-shaped holes 103 in the second insulating plate 20 are located on the same horizontal line; the other end of the handwheel screw 80 on the first insulating plate 10 passes through the first strip-shaped hole 103 on the first insulating plate 10 and the conducting strip 70 on the first insulating plate 10 and then is in threaded connection with the second current fixed contact 60 on the first insulating plate 10, and the handwheel screw 80 on the first insulating plate 10 can move along the length direction of the first strip-shaped hole 103 on the first insulating plate 10; the other end of the hand wheel screw 80 on the second insulating plate 20 passes through the first strip-shaped hole 103 on the second insulating plate 20 and the conducting strip 70 on the second insulating plate 20 and then is in threaded connection with the second current fixed contact 60 on the second insulating plate 20, and the hand wheel screw 80 on the second insulating plate 20 can move along the length direction of the first strip-shaped hole 103 on the second insulating plate 20.
Specifically, three first bar-shaped holes 103 are formed in the first insulating plate 10, three first bar-shaped holes 103 are also formed in the second insulating plate 20, and the distance between the first bar-shaped holes 103 in the width direction is greater than the diameter of the hand wheel screw 80; in practical application, the range of the phase distance between the first current static contacts 50 on the two sides of the same insulating plate, which needs to be adjusted, is larger, and the position of the first current static contact 50 in the middle is hardly needed to be adjusted, in the three first strip-shaped holes 103 on the same insulating plate in the present application, the length of the first strip-shaped hole 103 in the middle along the radial direction of the hand wheel screw 80 is smaller than the length of the first strip-shaped holes 103 on the two sides along the radial direction of the hand wheel screw 80, it should be noted that the lengths of the three first strip-shaped holes on the same insulating plate are only examples, and the design can be specifically performed according to the needs of practical products.
When the distance between adjacent first current static contacts 50 on the same insulating plate needs to be adjusted, as shown in fig. 5, the hand wheel 90 is first rotated, so that the hand wheel screw 80 exits from the inner threaded hole on the second current static contact 60, when the preset position is reached, the hand wheel 90 stops rotating, the hand wheel 90 drives the hand wheel screw 80 to move in the radial direction of the hand wheel screw 80 in the first strip-shaped hole 103, when the hand wheel 90 moves to a proper position, the hand wheel 90 is then rotated in the reverse direction, the hand wheel 90 drives the hand wheel screw 80 to extend into the inner threaded hole on the second current static contact 60, and since the second current static contact 60 is arranged in the first current static contact 50, the position of the first current static contact 50 can be adjusted by adjusting the position of the second current static contact 60.
In some embodiments, as shown in fig. 1 in combination with fig. 2, 3 and 4, the first insulating plate 10 and the second insulating plate 20 in the present application are each provided with a plurality of second strip-shaped holes 104 along an axial direction perpendicular to the handwheel screw 80; the second strip-shaped hole 104 on the first insulating plate 10 is located below the first strip-shaped hole 103 on the first insulating plate 10 and is parallel to the first strip-shaped hole 103 on the first insulating plate 10; the second strip-shaped hole 104 on the second insulating plate 20 is positioned below the first strip-shaped hole 103 on the second insulating plate 20 and is parallel to the first strip-shaped hole 103 on the second insulating plate 20; the combination static contact assembly still includes 6mm electric current banana socket 704 and 4mm voltage banana socket 705, be provided with C shape conducting strip upper segment 701 on the conducting strip 70, C shape conducting strip lower segment 702 and C shape conducting strip interlude 703, conducting strip 70 passes behind second bar hole 104 through C shape conducting strip upper segment 701 and is connected with C shape conducting strip interlude 703, one side that C shape conducting strip interlude 703 was kept away from C shape conducting strip upper segment 701 is connected with C shape conducting strip lower segment 702, 6mm electric current banana socket 704 and 4mm voltage banana socket 705 all set up on C shape conducting strip interlude 703, and 6mm electric current banana socket 704 is located 4mm voltage banana socket 705 below.
This application designs 6mm electric current banana socket 704 at the lower extreme, designs 4mm voltage banana socket 705 in the upper end, and when the static contact and handcart circuit breaker cooperation constitute a return circuit about, the upper and lower structure of banana socket accords with the requirement of return circuit resistance test.
In some embodiments, in order to match the configuration of the alligator clip and the power test clip of the existing testing apparatus, increase the contact area and friction force of the clip, and ensure that the clip is stable and reliable, soft copper strips (not shown) are welded on both the upper section 701 of the C-shaped conductive plate and the lower section 702 of the C-shaped conductive plate.
In some embodiments, as shown in fig. 1, the combined stationary contact assembly of the present application further includes a fastening member 602, the first current stationary contact 50 is axially provided with a central hole, an end of the second current stationary contact 60 facing the central hole is provided with an external thread 601, an end of the second current stationary contact 60 facing the central hole is located in the central hole, the fastening member 602 is threadedly connected to the external thread 601, and the fastening member 602 is located in the first current stationary contact 50.
During assembly, the fastening member 602 is first installed on the external thread 601 of the second current stationary contact 60, and then one end of the second current stationary contact 60 facing the central hole is disposed in the central hole of the first current stationary contact 50, at this time, the fastening member 602 is located inside the first current stationary contact 50.
When the distance between the side of the second current fixed contact 60 away from the fastening member 602 and the side of the first current fixed contact 50 away from the fastening member 602 needs to be adjusted, for example, when the fastening member 602 is rotated clockwise, the section of the external thread 601 on the second current fixed contact 60 moves toward the central hole of the first current fixed contact 50, at this time, the distance between the side of the second current fixed contact 60 away from the fastening member 602 and the side of the first current fixed contact 50 away from the fastening member 602 decreases, when the fastening member 602 is rotated counterclockwise, the section of the external thread 601 on the second current fixed contact 60 moves toward the side of the central hole away from the first current fixed contact 50, at this time, the distance between the side of the second current fixed contact 60 away from the fastening member 602 and the side of the first current fixed contact 50 away from the fastening member 602 increases.
Further, as shown in fig. 6, the length of the second current stationary contact 60 in the axial direction is greater than the length of the first current stationary contact 50 in the axial direction, so that when the second current stationary contact 60 is inserted into the tulip contact finger 03 on the handcart circuit breaker 02 on the cart 01, the first current stationary contact 50 does not affect the function thereof, and when the first current stationary contact 50 is inserted into the tulip contact finger 03, because the inner diameter of the large-current tulip contact finger is larger, the second current stationary contact 60 is inserted into the hollow portion of the large-current tulip contact finger conductive arm, and if the inner diameter of the large-current tulip contact finger conductive arm is smaller than the outer diameter of the second current stationary contact 60, so that the insertion cannot be performed, the fastener 602 needs to be rotated to move the first current stationary contact 50 to a side close to the tulip contact finger 03 relative to the second current stationary contact 60, so as to indirectly shrink the second current stationary contact 60, in this way, the second current static contact 60 does not affect the function under any condition, that is, the second current static contact 60 and the first current static contact 50 are not affected by each other, and can be used simultaneously, and the large and small current static contacts do not need to be frequently replaced.
In some embodiments, to facilitate the gripping of the whole device, as shown in fig. 1, the side of the first insulating plate 10 facing away from the second insulating plate 20 is provided with a handle 101. When the whole device needs to be grabbed, the whole device needs to be grabbed through the handle 101.
Further, after the whole device regulation matches, for the convenience of carrying the whole device to make the whole device can insert the plum blossom on the handcart circuit breaker and touch and indicate, as shown in fig. 1, this application is equally divided at the both ends of first insulating plate 10 and second insulating plate 20 and is provided with a handle 102 respectively, through holding handle 102, inserts the test device in the plum blossom on the handcart circuit breaker touches and indicates, can carry out each item test work.
In summary, the invention of the present application, when in use:
as shown in fig. 1, when a mechanical characteristic test, a loop resistance test, a withstand voltage test and an insulation resistance test of the handcart circuit breaker 02 on the cart 01 are performed, firstly, the adjusting wheel 40 is rotated, the adjusting wheel 40 moves upwards or downwards along the axial direction of the screw 30, for example, when the adjusting wheel 40 rotates clockwise, the adjusting wheel 40 moves downwards along the axial direction of the screw 30, and at the same time, the adjusting wheel 40 drives the first insulating plate 10 to compress the elastic member 301, so that the vertical distance between the first insulating plate 10 and the second insulating plate 20 is reduced; when the adjusting wheel 40 rotates counterclockwise, the adjusting wheel moves upward along the axial direction of the screw 30, at this time, the elastic member 301 extends, the first insulating plate 10 moves upward under the action of the elastic member 301, so that the vertical distance between the first insulating plate 10 and the second insulating plate 20 increases, and when the vertical distance between the first insulating plate 10 and the second insulating plate 20 is adjusted, the adjusting wheel 40 stops rotating;
then, as shown in fig. 5, the hand wheel 90 is rotated, so that the hand wheel screw 80 is withdrawn from the inner threaded hole of the second current static contact 60, when a preset position is reached, the hand wheel 90 stops rotating, at this time, the hand wheel screw 80 is driven by the hand wheel 90 to move in the radial direction of the first strip-shaped hole 103 along the hand wheel screw 80, when the hand wheel 90 moves to a proper position, the hand wheel 90 is rotated in the reverse direction, the hand wheel 90 drives the hand wheel screw 80 to extend into the inner threaded hole of the second current static contact 60, because the second current static contact 60 is arranged in the first current static contact 50, the position of the first current static contact 50 can be adjusted by adjusting the position of the second current static contact 60, after the position of the first current static contact 50 on the same insulation board is adjusted, the hand wheel 90 is screwed, and thus, the test device only needs to be adjusted once. After the test device is adjusted and matched, the handles 102 on the two sides of the epoxy resin are held by hands, and the test device is correspondingly inserted into the plum blossom-shaped contact finger 03 on the handcart circuit breaker 02 (as shown in fig. 6), so that various test works can be carried out.
Then develop and continue the characteristic test, only need to insert 4mm voltage banana socket 705 with mechanical properties tester test wire 4mm banana plug and acquire circuit breaker fracture signal, can develop the mechanical properties test, and can not take place the shake and cause the bounce unqualified, and after a handcart circuit breaker mechanical properties test was done, only need pull out test device, insert next handcart circuit breaker, need not check signal line phase sequence and repeated dismouting alligator clip, accomplish the line change fast basically in 5S, improve test work efficiency greatly.
The circuit resistance test of the handcart circuit breaker can be carried out by inserting the test device into a plum blossom contact finger 03 on the handcart circuit breaker 02, clamping a large current clamp of the circuit resistance tester 100A at a soft copper strip on the lower section 702 of the C-shaped conducting strip and clamping a voltage clamp at the soft copper strip on the upper section 701 of the C-shaped conducting strip, wherein the 4mm voltage banana socket 705 and the 6mm current banana socket 704 can also meet the voltage, current technical parameters and test requirements of the circuit resistance, and the circuit resistance tester can be flexibly selected according to the wiring of the circuit resistance tester. Therefore, the current of the loop resistance test clamp 100A can not flow through the plum blossom contact finger spring, the influence of heating, burning and deformation of the spring can not be caused, the silver coating layer of the contact finger can not be damaged, and the contact resistance of the contact finger can not be increased. In addition, the contact resistance condition of the plum blossom contact fingers when the handcart breaker is at the working position can be detected, the pressing force of the plum blossom contact fingers is indirectly reflected, potential equipment hidden dangers are found in advance, and the health level of the equipment is improved. And after the handcart circuit breaker loop resistance test is finished, only the test device needs to be pulled out and a next handcart circuit breaker is inserted, so that the handcart circuit breaker testing device is convenient and fast, and the efficiency is improved.
Carrying out a pressure resistance test: similarly, the test device is inserted into the quincunx contact finger 03 on the handcart circuit breaker 02, the test wire with the banana plug of 4mm is inserted into the banana socket 705 with the voltage of 4mm, three-phase interphase short circuit can be realized, and the voltage withstand test clamp is clamped at the soft copper strip which clamps the voltage clamp on the upper section 701 of the C-shaped conducting strip or the lower section 702 of the C-shaped conducting strip, so that the voltage withstand test can be carried out. The phase to be short-circuited is flexibly selected, and large voltage resistance or interphase large voltage resistance can be flexibly realized. And after a handcart circuit breaker withstand voltage test is finished, only the test device needs to be pulled out and a next handcart circuit breaker is inserted, so that the test device is convenient and fast, and the efficiency is improved.
Develop the insulation resistance test, on inserting the plum blossom on the handcart circuit breaker with the testing arrangement equally and touching the finger, the test wire that will have 4mm banana plug inserts 4mm voltage banana socket 705 and can realize the alternate short circuit of three-phase, and the short circuit demand can be selected according to the test demand is nimble, then uses the megger to shake a point alone, can detect whole insulation level, discharges and also only need put a point and can accomplish and discharge. And after the handcart circuit breaker insulation resistance test is finished, only need pull out test device, insert next handcart circuit breaker, convenient and fast improves efficiency.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a handcart circuit breaker testing device which characterized in that includes:
a first insulating plate (10);
a second insulating plate (20);
a support assembly on which the first insulating plate (10) and the second insulating plate (20) are both disposed, and the first insulating plate (10) is movable in an axial direction of the support assembly to adjust a distance between the first insulating plate (10) and the second insulating plate (20);
the combined static contact assembly is characterized in that the first insulating plate (10) and the second insulating plate (20) are both provided with a plurality of combined static contact assemblies along the direction perpendicular to the axial direction of the supporting assembly, and the combined static contact assemblies on the first insulating plate (10) and the combined static contact assemblies on the second insulating plate (20) can move along the direction perpendicular to the axial direction of the supporting assembly.
2. The handcart circuit breaker testing device of claim 1, wherein the support assembly comprises a nut (302), a compression member and two threaded rods (30), one end of each threaded rod (30) is provided with the nut (302), and the other end is provided with the compression member;
the first insulating plate (10) is arranged between the two screws (30), and the compression piece on each screw (30) is matched with the first insulating plate (10) and used for driving the first insulating plate (10) to axially move along the screws (30);
the second insulating plate (20) is arranged between the two screw rods (30), the second insulating plate (20) is positioned below the first insulating plate (10), and one side, far away from the first insulating plate (10), of the second insulating plate (20) is abutted to the nut (302) on each screw rod (30).
3. The handcart circuit breaker testing device according to claim 2, wherein the compression member comprises an elastic member (301) and an adjusting wheel (40), and each screw rod (30) is provided with the elastic member (301) and the adjusting wheel (40);
the elastic piece (301) is located between the first insulating plate (10) and the second insulating plate (20), the adjusting wheel (40) is located on one side, away from the second insulating plate (20), of the first insulating plate (10), and the adjusting wheel (40) is in threaded connection with the screw (30).
4. The handcart circuit breaker testing device of claim 3, wherein the supporting component further comprises a first gasket (303) and a second gasket (304), the first gasket (303) and the second gasket (304) are sleeved on the screw rod (30), one end of the elastic piece (301) is abutted to the second insulating plate (20) through the first gasket (303), and the other end of the elastic piece is abutted to the first insulating plate (10) through the second gasket (304).
5. The handcart circuit breaker testing device according to claim 1, wherein the combined static contact assembly comprises a first current static contact (50), a second current static contact (60), a conducting strip (70) and a fixing piece, the diameter of the first current static contact (50) is larger than that of the second current static contact (60), and the second current static contact (60) is arranged in the first current static contact (50);
a conducting strip (70) on the first insulating plate (10) is located between a first current static contact (50) on the first insulating plate (10) and the first insulating plate (10), a fixing piece on the first insulating plate (10) is located on one side away from the first current static contact (50) on the first insulating plate (10), and the fixing piece on the first insulating plate (10) penetrates through the first insulating plate (10) and the conducting strip (70) on the first insulating plate (10) and then is connected with a second current static contact (60) on the first insulating plate (10);
the conducting strip (70) on the second insulating plate (20) is located between the first current fixed contact (50) on the second insulating plate (20) and the second insulating plate (20), the fixing piece on the second insulating plate (20) is located on the side away from the first current fixed contact (50) on the second insulating plate (20), and the fixing piece on the second insulating plate (20) penetrates through the second insulating plate (20) and the conducting strip (70) on the second insulating plate (20) and then is connected with the second current fixed contact (60) on the second insulating plate (20).
6. The handcart circuit breaker testing device of claim 5, wherein the fixing member comprises a hand wheel screw (80) and a hand wheel (90);
one end of a hand wheel screw rod (80) on the first insulating plate (10) is connected with the hand wheel (90), and the other end of the hand wheel screw rod (80) on the first insulating plate (10) penetrates through the first insulating plate (10) and a conducting strip (70) on the first insulating plate (10) and then is in threaded connection with a second current static contact (60) on the first insulating plate (10);
one end of a hand wheel screw rod (80) on the second insulating plate (20) is connected with the hand wheel (90), and the other end of the hand wheel screw rod (80) on the second insulating plate (20) penetrates through the second insulating plate (20) and a conducting strip (70) on the second insulating plate (20) and then is in threaded connection with a second current static contact (60) on the second insulating plate (20).
7. The handcart circuit breaker testing device according to claim 6, wherein a plurality of first strip-shaped holes (103) are formed in the first insulating plate (10) and the second insulating plate (20) along the axial direction perpendicular to the hand wheel screw (80), the first strip-shaped holes (103) in the first insulating plate (10) are located on the same horizontal line, and the first strip-shaped holes (103) in the second insulating plate (20) are located on the same horizontal line;
the other end of the hand wheel screw (80) on the first insulating plate (10) penetrates through a first strip-shaped hole (103) on the first insulating plate (10) and a conducting strip (70) on the first insulating plate (10) and then is in threaded connection with a second current static contact (60) on the first insulating plate (10), and the hand wheel screw (80) on the first insulating plate (10) can move along the length direction of the first strip-shaped hole (103) on the first insulating plate (10);
the other end of the hand wheel screw (80) on the second insulating plate (20) penetrates through the first strip-shaped hole (103) on the second insulating plate (20) and the conducting strip (70) on the second insulating plate (20) and then is in threaded connection with the second current static contact (60) on the second insulating plate (20), and the hand wheel screw (80) on the second insulating plate (20) can move along the length direction of the first strip-shaped hole (103) on the second insulating plate (20).
8. The handcart circuit breaker testing device according to claim 7, wherein a plurality of second strip-shaped holes (104) are formed in the first insulating plate (10) and the second insulating plate (20) along the axial direction perpendicular to the hand wheel screw (80); a second strip-shaped hole (104) in the first insulating plate (10) is positioned below a first strip-shaped hole (103) in the first insulating plate (10) and is parallel to the first strip-shaped hole (103) in the first insulating plate (10); the second strip-shaped hole (104) on the second insulating plate (20) is positioned below the first strip-shaped hole (103) on the second insulating plate (20) and is parallel to the first strip-shaped hole (103) on the second insulating plate (20);
the combined static contact assembly also comprises a 6mm current banana socket (704) and a 4mm voltage banana socket (705), the conducting strip (70) is provided with a C-shaped conducting strip upper section (701), a C-shaped conducting strip lower section (702) and a C-shaped conducting strip middle section (703), the conducting strip (70) penetrates through the second strip-shaped hole (104) through the C-shaped conducting strip upper section (701) and then is connected with the C-shaped conducting strip middle section (703), one side of the middle section (703) of the C-shaped conducting strip, which is far away from the upper section (701) of the C-shaped conducting strip, is connected with the lower section (702) of the C-shaped conducting strip, the 6mm current banana jack (704) and the 4mm voltage banana jack (705) are both arranged on the C-shaped conductive sheet middle section (703), and the 6mm current banana socket (704) is located below the 4mm voltage banana socket (705).
9. The handcart circuit breaker testing device of claim 5, wherein the combination static contact assembly further comprises a fastener (602), the first current static contact (50) is provided with a center hole along the axial direction, the second current static contact (60) faces towards one end of the center hole and is provided with an external thread (601), the second current static contact (60) faces towards one end of the center hole and is located in the center hole, the fastener (602) is in threaded connection with the external thread (601), and the fastener (602) is located in the first current static contact (50).
10. The handcart circuit breaker testing device of any one of claims 1 to 9, wherein a handle (101) is arranged on a side of the first insulating plate (10) facing away from the second insulating plate (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011268869.6A CN112485658B (en) | 2020-11-13 | 2020-11-13 | Handcart circuit breaker testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011268869.6A CN112485658B (en) | 2020-11-13 | 2020-11-13 | Handcart circuit breaker testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112485658A true CN112485658A (en) | 2021-03-12 |
| CN112485658B CN112485658B (en) | 2022-08-30 |
Family
ID=74930076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011268869.6A Active CN112485658B (en) | 2020-11-13 | 2020-11-13 | Handcart circuit breaker testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112485658B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06276624A (en) * | 1993-03-15 | 1994-09-30 | Hitachi Ltd | Position measuring device for disconnector part of control panel |
| CN201781209U (en) * | 2010-07-15 | 2011-03-30 | 镇江大全伊顿电器有限公司 | Hand truck moving contact mounting clamping fixture |
| CN102157906A (en) * | 2011-05-17 | 2011-08-17 | 江苏省电力公司常州供电公司 | Clamping device of handcart breaker equipment maintenance car |
| CN202373889U (en) * | 2011-12-30 | 2012-08-08 | 厦门先海电气设备有限公司 | Circuit breaker with handcart |
| CN202772030U (en) * | 2012-06-20 | 2013-03-06 | 四川电器集团股份有限公司 | Three-phase circuit breaker with variable phase spacing and electrode spacing |
| CN105449563A (en) * | 2015-11-19 | 2016-03-30 | 宁波奥克斯高科技有限公司 | Circuit breaker handcart calibrating device and calibration method therefor |
| CN107064647A (en) * | 2017-04-24 | 2017-08-18 | 东营市垦利区明珠电力工程有限公司 | A kind of handcart type breaker loop resistance test device |
| CN208860931U (en) * | 2018-09-27 | 2019-05-14 | 南京帝开电气自动化有限公司 | A kind of handcart type breaker detection device |
| CN110824348A (en) * | 2019-11-20 | 2020-02-21 | 国网辽宁省电力有限公司葫芦岛供电公司 | Adjustable butt joint device for plum blossom-shaped round contact of handcart type vacuum circuit breaker |
| CN210245955U (en) * | 2019-09-03 | 2020-04-03 | 苏州市品润金属制品有限公司 | Circuit breaker installing support |
| CN111185635A (en) * | 2020-03-04 | 2020-05-22 | 点栈(绍兴)智能科技有限公司 | Complete set of assembly line equipment for high-speed slitting of battery pole pieces and slitting method |
-
2020
- 2020-11-13 CN CN202011268869.6A patent/CN112485658B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06276624A (en) * | 1993-03-15 | 1994-09-30 | Hitachi Ltd | Position measuring device for disconnector part of control panel |
| CN201781209U (en) * | 2010-07-15 | 2011-03-30 | 镇江大全伊顿电器有限公司 | Hand truck moving contact mounting clamping fixture |
| CN102157906A (en) * | 2011-05-17 | 2011-08-17 | 江苏省电力公司常州供电公司 | Clamping device of handcart breaker equipment maintenance car |
| CN202373889U (en) * | 2011-12-30 | 2012-08-08 | 厦门先海电气设备有限公司 | Circuit breaker with handcart |
| CN202772030U (en) * | 2012-06-20 | 2013-03-06 | 四川电器集团股份有限公司 | Three-phase circuit breaker with variable phase spacing and electrode spacing |
| CN105449563A (en) * | 2015-11-19 | 2016-03-30 | 宁波奥克斯高科技有限公司 | Circuit breaker handcart calibrating device and calibration method therefor |
| CN107064647A (en) * | 2017-04-24 | 2017-08-18 | 东营市垦利区明珠电力工程有限公司 | A kind of handcart type breaker loop resistance test device |
| CN208860931U (en) * | 2018-09-27 | 2019-05-14 | 南京帝开电气自动化有限公司 | A kind of handcart type breaker detection device |
| CN210245955U (en) * | 2019-09-03 | 2020-04-03 | 苏州市品润金属制品有限公司 | Circuit breaker installing support |
| CN110824348A (en) * | 2019-11-20 | 2020-02-21 | 国网辽宁省电力有限公司葫芦岛供电公司 | Adjustable butt joint device for plum blossom-shaped round contact of handcart type vacuum circuit breaker |
| CN111185635A (en) * | 2020-03-04 | 2020-05-22 | 点栈(绍兴)智能科技有限公司 | Complete set of assembly line equipment for high-speed slitting of battery pole pieces and slitting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112485658B (en) | 2022-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112485658B (en) | Handcart circuit breaker testing device | |
| CN110768048A (en) | High-temperature high-pressure sealing connector | |
| CN109212317B (en) | Cubical switchboard major loop resistance measurement frock | |
| CN203479982U (en) | Multi-purpose testing clamp for chip resistor | |
| CN215067025U (en) | Transformer performance testing device | |
| CN112578164B (en) | Power safety detection device for circuit construction | |
| CN104459224B (en) | Special joint for measuring handcart circuit breaker contact resistance | |
| CN211826179U (en) | Circuit breaker detection device | |
| CN212341400U (en) | Battery module testing arrangement | |
| CN204287258U (en) | A kind of vertical spring probe assembly | |
| CN110927567A (en) | Relay test tool | |
| CN106526252B (en) | Use method of thyristor-level measuring handle device | |
| CN210465601U (en) | Clamping device for semiconductor test | |
| CN215297457U (en) | Fixing device for withstand voltage insulation test of hand tool | |
| CN109738772A (en) | A kind of device for high-voltage capacitor voltage-withstand test | |
| CN113325222B (en) | Telescopic insulating operating rod with electroscope | |
| CN217332549U (en) | Detection equipment for high-voltage transformer | |
| CN112180249B (en) | Switch loop resistance test platform | |
| CN217034021U (en) | GIS breaker loop resistance test clip | |
| CN108107311B (en) | Wiring device and detection system | |
| CN212622966U (en) | Efficient battery detection device | |
| CN210926419U (en) | High-temperature high-pressure sealing connector | |
| CN212622887U (en) | High-voltage distribution line short-circuit fault addressing device | |
| CN217505974U (en) | Capacitor insulation resistance test tool | |
| CN216387305U (en) | Support frame for low-voltage switch detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |