A device and method for detecting insulation distance

Abstract

The application discloses a device and method for detecting insulation distance, wherein the first telescopic cavity, the second telescopic cavity and the third telescopic cavity can cooperate to adjust the overall length of the device, each distance contact point is connected with a corresponding distance prompt lamp, the sliding distance of the telescopic button is different, and each distance contact point corresponding to the telescopic button is also different, each contact point corresponds to different detection distances, during detection, the contact point moves along the circuit substrate, when the contact point slides to the upper end of the distance contact point, the circuit is connected, and the corresponding distance prompt lamp emits light, the actual detected insulation distance can be obtained according to the corresponding prompt lamp, whether the detected insulation distance is within the standard safety distance is judged, the detection result is more accurate, meanwhile, the telescopic part is arranged in the third telescopic cavity, which is helpful to the automatic reset of the telescopic button after detection, and the detection of the next detection point is facilitated, and the operation is more convenient.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of switch installation detection, and relates to a device and method for detecting insulation distance. BACKGROUND

[0002] Currently, the safety requirement of 10kV metal armored closed movable switch device requires that the insulation clearance between live parts is greater than or equal to 125mm, and the safety requirement of 35kV metal armored closed movable switch device requires that the insulation clearance between live parts is greater than or equal to 300mm. After the switch cabinet is completed, the safety insulation distance is generally obtained by measuring with an ordinary steel tape.

[0003] Although the insulation distance of the switch cabinet complete equipment can be measured with a steel tape to obtain the real-time insulation distance and the specific and accurate measured value, the switch cabinet equipment is complex after being completed, the primary equipment and secondary device circuit are complex, the space is small, the light condition inside the switch cabinet is poor, the measurement is difficult and low in efficiency, the steel tape must be accurately pulled to the position at both ends and then the effective insulation distance can be observed at the correct visual angle.

[0004] The existing technology has the problems of low efficiency, and the measurement results that are difficult to reach inside the switch cabinet often need more time and manpower to complete, and the length measurement results need to be confirmed multiple times, so that it is impossible to accurately determine whether the installation is qualified. SUMMARY

[0005] The purpose of the application is to solve the problem that the safety insulation distance is generally obtained by measuring with an ordinary steel tape after the switch cabinet is completed in the prior art, but the light condition inside the switch cabinet is poor and the space is small, so it is impossible to accurately determine whether the insulation distance between the components meets the standard distance of the industry, and to provide a device and method for detecting insulation distance.

[0006] To achieve the above purpose, the application adopts the following technical scheme:

[0007] A device for detecting insulation distance, comprising a first telescopic cavity, a second telescopic cavity and a third telescopic cavity, the second telescopic cavity is embedded into the inside of the first telescopic cavity, the second telescopic cavity can slide along the inside of the first telescopic cavity, the third telescopic cavity is embedded into the inside of the second telescopic cavity, and the third telescopic cavity can slide along the inside of the second telescopic cavity.

[0008] An axle support plate is arranged in the inside of the third telescopic cavity, a telescopic button is arranged at one end of the third telescopic cavity away from the second telescopic cavity, the telescopic button penetrates the end of the third telescopic cavity and the axle support plate in sequence, a telescopic piece is sleeved on the telescopic button, a limiting surface is arranged on the telescopic button, one end of the telescopic piece abuts against the limiting surface, and the other end abuts against the axle support plate.

[0009] The circuit substrate is arranged on the side of the shaft support plate away from the telescopic part, the contact is arranged at the end of the telescopic button inside the third telescopic cavity, a plurality of groups of distance contacts and distance prompt lamps corresponding to each group of distance contacts are arranged on the circuit substrate, the contact can be in contact with the distance contact when sliding, and the corresponding distance prompt lamp is started when the contact is in contact with the distance contact.

[0010] Further improvement of the present application is:

[0011] The circuit substrate is arranged on the side of the shaft support plate away from the telescopic part, the contact is arranged at the end of the telescopic button inside the third telescopic cavity, a plurality of groups of distance contacts and distance prompt lamps corresponding to each group of distance contacts are arranged on the circuit substrate, the contact can be in contact with the distance contact when sliding, and the corresponding distance prompt lamp is started when the contact is in contact with the distance contact.

[0012] Each group of distance contacts includes two parallelly distributed contacts, and the contact can be connected with the two parallelly distributed contacts at the same time.

[0013] The telescopic part is a telescopic button spring.

[0014] One end of the second telescopic cavity is provided with a first button spring, and the first button spring is used for fixing the first telescopic cavity and the second telescopic cavity.

[0015] One end of the third telescopic cavity is provided with a second button spring, and the second button spring is used for fixing the second telescopic cavity and the third telescopic cavity.

[0016] The circuit substrate is provided with a first lithium battery and a second lithium battery, and the first lithium battery and the second lithium battery are connected with the distance prompt lamp.

[0017] The method for detecting the insulation distance of the device according to the present application comprises the following steps:

[0018] According to the standard distance between the two components to be detected, the relative positions among the first telescopic cavity, the second telescopic cavity and the third telescopic cavity are adjusted, so that the axial length of the detection device corresponds to the standard distance.

[0019] The detection device is placed between the two components to be detected, and the detection is started:

[0020] If the distance prompt lamp does not emit light, it is determined that the actual distance between the two components is greater than the standard distance.

[0021] If the telescopic button slides into the third telescopic cavity, the contact starts to move along the circuit substrate, and the corresponding distance prompt lamp emits light, it is determined that the actual distance between the two components is less than the standard distance.

[0022] The determination that the actual distance between the two components is less than the standard distance comprises:

[0023] setting an error range between the actual distance and the standard distance between the two components, and the distance between the distance contacts close to the shaft support plate and the distance contacts far from the shaft support plate in the several groups of distance contacts is equal to the error range;

[0024] when the telescopic button slides into the third telescopic cavity and the contacts start to move along the circuit substrate, the number of times the distance prompt light is lit is recorded;

[0025] when the contacts stop moving, if the total number of times all the distance prompt lights are lit is equal to n and the distance prompt light is in the off state, it is determined that the difference between the actual distance and the standard distance between the two components is greater than the error range, wherein n represents the number of groups of distance contacts;

[0026] when the contacts stop moving, if the total number of times all the distance prompt lights are lit is less than n, or the total number of times all the distance prompt lights are lit is equal to n and the distance prompt light is in the on state, it is determined that the difference between the actual distance and the standard distance between the two components is within the error range.

[0027] a buzzer is further included, and the buzzer alarms when the contacts contact the distance contacts, and the circuit is disconnected and the buzzer is turned off when the contacts are separated from the distance contacts;

[0028] during detection:

[0029] if the buzzer does not alarm, it is determined that the actual distance between the two components is greater than the standard distance;

[0030] if the buzzer alarms, it is determined that the actual distance between the two components is less than the standard distance.

[0031] the determination that the actual distance between the two components is less than the standard distance comprises:

[0032] setting an error range between the actual distance and the standard distance between the two components, and the distance between the distance contacts close to the shaft support plate and the distance contacts far from the shaft support plate in the several groups of distance contacts is equal to the error range;

[0033] when the telescopic button slides into the third telescopic cavity and the contacts start to move along the circuit substrate, the number of times the buzzer alarms is recorded;

[0034] when the contacts stop moving, if the buzzer is in the off state and the number of times the buzzer alarms is equal to n, it is determined that the difference between the actual distance and the standard distance between the two components is greater than the error range, wherein n represents the number of groups of distance contacts;

[0035] when the contacts stop moving, the number of times the buzzer alarms is less than n, or the number of times the buzzer alarms is equal to n and the buzzer is in the on state, it is determined that the difference between the actual distance and the standard distance between the two components is within the error range.

[0036] Compared with the prior art, the present application has the following beneficial effects:

[0037] The utility model discloses a kind of detection insulation distance devices, first telescopic cavity, second telescopic cavity and third telescopic cavity can cooperate with the overall length of adjusting device, each distance contact point has corresponding distance prompt light of connection, telescopic button sliding distance is different, corresponding each distance contact point is also different, each contact point corresponds different detection distance, when detecting, contact point moves along circuit substrate, when contact point slides to with distance contact point upper end, circuit is connected, corresponding distance prompt light emits light, can be judged according to corresponding prompt light whether detection insulation distance is within standard safety distance, detection result is more accurate, simultaneously, telescopic member is arranged in third telescopic cavity, it is helpful to the automatic reset of telescopic button after detection, it is convenient for the detection of next detection point, operation is more convenient.

[0038] Further, in the utility model, buzzer is further arranged on the circuit substrate, when any distance contact point contacts the contact point, the buzzer is started, and the detection result is more accurate by the double judgment of the buzzer and the light emitting of the prompt light.

[0039] The utility model discloses a kind of detection insulation distance methods, first telescopic cavity, second telescopic cavity and third telescopic cavity can cooperate with the overall length of adjusting device, each distance contact point has corresponding distance prompt light of connection, telescopic button sliding distance is different, corresponding each distance contact point is also different, each contact point corresponds different detection distance, when detecting, contact point moves along circuit substrate, when contact point slides to with distance contact point upper end, circuit is connected, corresponding distance prompt light emits light, can be judged according to the number of corresponding prompt light whether detection insulation distance is within standard safety distance, detection result is more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0041] Figure 1 is the length of the device disclosed in the embodiment is 125mm working state appearance diagram;

[0042] Figure 2 is the length of the device disclosed in the embodiment is 300mm working state appearance diagram;

[0043] Figure 3 is the device cross section structure arrangement disclosed in the embodiment.

[0044] Figure 4 is the exploded view of the overall structure of the device disclosed in the embodiment;

[0045] Figure 5 is the two-dimensional component structure arrangement view of the device disclosed in the embodiment;

[0046] Figure 6 is the two-dimensional component secondary schematic diagram of the device disclosed in the embodiment;

[0047] Figure 7 is the measurement process principle explanation view of the device disclosed in the embodiment.

[0048] Wherein: 1, first telescopic cavity; 2, first button spring; 3, second telescopic cavity; 4, second button spring; 5, third telescopic cavity; 6, two-dimensional component; 7, component cover plate; 8, shaft support plate; 9, telescopic button spring; 10, contact; 11, telescopic button; 12, first buckle button; 13, second buckle button; 14, circuit substrate; 15, distance contact; 15-1, first group of distance contacts; 15-2, second group of distance contacts; 15-3, third group of distance contacts; 16, buzzer; 17, first distance prompt light; 18, second distance prompt light; 19, third distance prompt light; 20, voltage stabilizing diode; 21, TYPE-C charging port; 22, first lithium battery; 23, second lithium battery. DETAILED DESCRIPTION

[0049] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0051] It should be noted that: similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0052] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, or the orientation or position relationship of the product of the present application when it is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0053] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0054] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] The present application will be described in further detail below with reference to the accompanying drawings:

[0056] Referring to Figures 1 to 7 The embodiments of the present application disclose a device for detecting insulation distance, which is used for detecting the insulation distance of a switch cabinet complete set, and determining whether the safe insulation distance between components is qualified through the distance measurement result.

[0057] Embodiment 1

[0058] Referring to Figures 1 to 4The embodiment of the application discloses a device for detecting insulation distance, which comprises a first telescopic cavity 1, a second telescopic cavity 3 arranged at one end of the first telescopic cavity 1, and a third telescopic cavity 5 arranged at one end of the second telescopic cavity 3; the second telescopic cavity 3 can slide along the inside of the first telescopic cavity 1, and the third telescopic cavity 5 can slide along the inside of the second telescopic cavity 3; the axial length of the whole device can be changed by adjusting the positions of the second telescopic cavity 3 and the third telescopic cavity 5; an axle support plate 8 is arranged in the third telescopic cavity 5, a telescopic button 11 is arranged at the end of the third telescopic cavity 5 away from the second telescopic cavity 3, the telescopic button 11 penetrates the end of the third telescopic cavity 5 and the axle support plate 8 in sequence, a telescopic piece is arranged on the telescopic button 11, and the telescopic piece abuts against the axle support plate 8; a circuit substrate 14 is arranged on the side of the axle support plate 8 away from the telescopic piece, a contact 10 is arranged at the end of the third telescopic cavity 5 inside the third telescopic cavity 5, and a plurality of groups of distance contacts 15 are arranged on the circuit substrate 14; each group of distance contacts 15 is connected to a corresponding distance prompt lamp in a communication mode, and when the contact 10 slides to the upper end of the distance contacts 15, the circuit is connected, and the corresponding distance prompt lamp emits light.

[0059] Further, in the embodiment, a buzzer 16 is further arranged on the circuit substrate 14, the buzzer 16 is started when any distance contact 15 contacts the contact 10, and the buzzer 16 is closed when the distance contact 15 is separated from the contact 10.

[0060] Further, in the embodiment, each group of distance contacts 15 comprises two parallel contacts, and two contact parts are arranged on the contact 10, when the contact 10 slides to the upper end of the distance contacts 15, the two contact parts on the contact 10 respectively contact the two parallel contacts, the circuit is connected, the corresponding distance prompt lamp emits light, and the buzzer 16 is started.

[0061] Further, in the embodiment, the materials of the contact 10 and the distance contacts 15 are copper, and the circuit is connected when the contact 10 and the distance contacts 15 contact each other.

[0062] Further, the embodiment is mainly applied to the detection of 10-kilovolt switch cabinets and 40.5-kilovolt switch cabinets, the national standard insulation distance of the 10-kilovolt switch cabinet is greater than or equal to 125 mm, and the national standard insulation distance of the 40.5-kilovolt switch cabinet is greater than or equal to 300 mm.

[0063] Referring to Figure 1 In order to detect the external state of the device when the 10-kilovolt switch cabinet is detected, referring to Figure 2 In order to detect the external state of the device when the 40.5-kilovolt switch cabinet is detected, specifically, when the first telescopic cavity 1, the second telescopic cavity 3 and the third telescopic cavity 5 are contracted to the shortest distance, the distance of 125 mm is detected, and when the first telescopic cavity 1, the second telescopic cavity 3 and the third telescopic cavity 5 are elongated to the longest distance, the distance of 300 mm is detected.

[0064] Further, the first telescopic cavity 1 and the second telescopic cavity 3 have corresponding sliding rails on the inner walls, the sliding rails of the first telescopic cavity 1 and the second telescopic cavity 3 are protrusions protruding from the inner walls to the inside of the cavities, the second telescopic cavity 3 has a sliding groove on the outer wall corresponding to the sliding rail of the first telescopic cavity 1, and the third telescopic cavity 5 has a sliding groove on the outer wall corresponding to the sliding rail of the second telescopic cavity 3, the sliding grooves are grooves recessed from the outer walls to the inside of the cavities, and the grooves and the protrusions are matched to realize the sliding of the second telescopic cavity 3 and the third telescopic cavity 5.

[0065] Further, the first telescopic cavity 1 and the second telescopic cavity 3 have corresponding sliding rails on the inner walls, the sliding rails of the first telescopic cavity 1 and the second telescopic cavity 3 are protrusions protruding from the inner walls to the inside of the cavities, the second telescopic cavity 3 has a sliding groove on the outer wall corresponding to the sliding rail of the first telescopic cavity 1, and the third telescopic cavity 5 has a sliding groove on the outer wall corresponding to the sliding rail of the second telescopic cavity 3, the sliding grooves are grooves recessed from the outer walls to the inside of the cavities, and the grooves and the protrusions are matched to realize the sliding of the second telescopic cavity 3 and the third telescopic cavity 5.

[0066] Further, the first telescopic cavity 1 and the second telescopic cavity 3 have corresponding sliding rails on the inner walls, the sliding rails of the first telescopic cavity 1 and the second telescopic cavity 3 are protrusions protruding from the inner walls to the inside of the cavities, the second telescopic cavity 3 has a sliding groove on the outer wall corresponding to the sliding rail of the first telescopic cavity 1, and the third telescopic cavity 5 has a sliding groove on the outer wall corresponding to the sliding rail of the second telescopic cavity 3, the sliding grooves are grooves recessed from the outer walls to the inside of the cavities, and the grooves and the protrusions are matched to realize the sliding of the second telescopic cavity 3 and the third telescopic cavity 5.

[0067] Further, the telescopic part is a telescopic button spring 9, the telescopic button spring 9 is sleeved on the telescopic button 11, the telescopic button 11 includes a support rod, one end of the support rod is connected with a button part, the other end of the support rod is provided with a contact 10, the button part is limited by a limiting surface at the end connected with the support rod, the limiting surface is located in the third telescopic cavity 5, the telescopic button spring 9 is sleeved on the support rod, one end of the telescopic button spring 9 abuts against the shaft support plate 8, and the other end of the telescopic button spring 9 abuts against the limiting surface.

[0068] Referring to Figures 5 to 6 Further, in the embodiment, the secondary element 6 includes:

[0069] The circuit board 14 is provided with three groups of distance contacts 15, including a first group of distance contacts 15-1, a second group of distance contacts 15-2 and a third group of distance contacts 15-3, and further includes a first distance prompt lamp 17, a second distance prompt lamp 18, a third distance prompt lamp 19, a buzzer 16, a stabilizing diode 20, a TYPE-C charging port 21, a first lithium battery 22 and a second lithium battery 23. The first lithium battery 22, the second lithium battery 23 and the stabilizing diode 20 are sequentially connected, and the first distance prompt lamp 17, the second distance prompt lamp 18, the third distance prompt lamp 19 and the buzzer 16 are all connected with the first lithium battery 22 and the second lithium battery 23. The specific circuit structure diagram is shown in Figure 6The first group of distance contacts 15-1 are connected in series with the first distance prompt light 17, the second group of distance contacts 15-2 are connected in series with the second distance prompt light 18, the third group of distance contacts 15-3 are connected in series with the third distance prompt light 19, the first group of distance contacts 15-1, the second group of distance contacts 15-2 and the third group of distance contacts 15-3 are connected in parallel through the contact 10, the first group of distance contacts 15-1, the second group of distance contacts 15-2 and the third group of distance contacts 15-3 are connected in series with the buzzer 16 respectively, the first lithium battery 22 and the second lithium battery 23 are connected in series, and the first lithium battery 22 and the second lithium battery 23 are connected in parallel with the voltage stabilizing diode 20 and the TYPE-C charging port 21.

[0070] When powered on, the first group of distance contacts 15-1 are connected in correspondence with the first distance prompt light 17, the second group of distance contacts 15-2 are connected in correspondence with the second distance prompt light 18, the third group of distance contacts 15-3 are connected in correspondence with the third distance prompt light 19, and the first group of distance contacts 15-1, the second group of distance contacts 15-2 and the third group of distance contacts 15-3 are connected in correspondence with the buzzer 16.

[0071] Further, the element cover plate 7 is connected with the outer shell of the third telescopic cavity 5, the element cover plate 7, the second telescopic cavity 3 and the first telescopic cavity 1 are provided with corresponding lamp holes and buzzer holes, and the distance prompt lights and the buzzer 16 are extended to the outside of the device according to the corresponding holes.

[0072] Further, the first distance prompt light 17 is a green light-emitting diode, the second distance prompt light 18 is a yellow light-emitting diode, and the third distance prompt light 19 is a red light-emitting diode.

[0073] Embodiment 2

[0074] The embodiment discloses a method for detecting insulation distance, comprising the following steps:

[0075] Step 1: According to the standard distance between the two components to be detected, adjust the relative positions among the first telescopic cavity 1, the second telescopic cavity 3 and the third telescopic cavity 5, so that the axial length of the detection device corresponds to the standard distance;

[0076] Step 2: Place the detection device between the two components to be detected and start detection:

[0077] Step 2.1: If the distance prompt light does not emit light or the telescopic button 11 does not slide into the third telescopic cavity 5, it is determined that the actual distance between the two components is greater than the standard distance;

[0078] Step 2.2: If the telescopic button 11 slides into the third telescopic cavity 5, the contact 10 starts to move along the circuit board 14, and the corresponding distance prompt light is on, it is determined that the actual distance between the two components is less than the standard distance.

[0079] Further, step 2.2 includes the following steps:

[0080] An error range between the actual distance between the two components and the standard distance is set, and the distance between the distance contacts 15 close to the shaft support plate 8 and the distance contacts 15 far from the shaft support plate 8 in the distance contacts 15 is equal to the error range.

[0081] When the telescopic button 11 slides into the third telescopic cavity 5, the contact 10 starts to move along the circuit board 14, and the number of times that all distance prompt lights are on is recorded.

[0082] When the contact 10 stops moving, if the total number of times that all distance prompt lights are on is equal to n, and the distance prompt light is off, it is determined that the difference between the actual distance between the two components and the standard distance is greater than the error range (indicating that the contact 10 has slid through all the distance contacts 15, and the contact 10 is not connected to any group of distance contacts, and the circuit of all distance prompt lights is off), where n represents the number of groups of distance contacts 15.

[0083] When the contact 10 stops moving, if the total number of times that all distance prompt lights are on is less than n, or the total number of times that all distance prompt lights are on is equal to n and the distance prompt light is on, it is determined that the difference between the actual distance between the two components and the standard distance is within the error range, specifically:

[0084] When the total number of times that all distance prompt lights are on is less than n, regardless of whether the distance prompt light is on or off, it indicates that the contact 10 is currently within the range of all distance contacts 15.

[0085] When the total number of times that all distance prompt lights are on is equal to n, and the distance prompt light is on, it indicates that the contact 10 is currently on the last group of distance contacts 15 and has not completely separated from the last group of distance contacts 15, proving that the difference between the actual distance between the two components and the standard distance is within the error range.

[0086] The detection combined with the buzzer 16 includes:

[0087] When detecting:

[0088] If the buzzer 16 does not alarm, it is determined that the actual distance between the two components is greater than the standard distance.

[0089] If the buzzer 16 alarms, it is determined that the actual distance between the two components is less than the standard distance, specifically including:

[0090] The error range between the actual distance between the two components and the standard distance is set, and the distance between the distance contacts 15 close to the shaft support plate 8 and the distance contacts 15 away from the shaft support plate 8 in the distance contacts 15 is equal to the error range;

[0091] When the telescopic button 11 slides to the inside of the third telescopic cavity 5, the contact 10 starts to move along the circuit substrate 14, and the number of times the buzzer 16 alarms is recorded;

[0092] When the contact 10 stops moving, if the buzzer 16 is in the closed state, the number of times the buzzer 16 alarms is equal to n, it is determined that the difference between the actual distance between the two components and the standard distance is greater than the error range, wherein n represents the number of groups of distance contacts 15, and in the embodiment, there are three groups of distance contacts 15, so n=3.

[0093] When the contact 10 stops moving, the number of times the buzzer 16 alarms is less than n, or the number of times the buzzer 16 alarms is equal to n and the buzzer 16 is in the open state, it is determined that the difference between the actual distance between the two components and the standard distance is within the error range.

[0094] Referring to Figure 7 , specifically, the detection of a 10-kilovolt switch cabinet is taken as an example, the national standard insulation distance of the 10-kilovolt switch cabinet is 125 mm, referring to Figure 2 , the displayed state is the state of the device 125 working mode, at this time the total length of the detection device in the natural state is 126 mm, which meets the requirements, and the distance contacts 15 are provided with three groups, including the first group of distance contacts 15-1, the second group of distance contacts 15-2, and the third group of distance contacts 15-3, the interval distance between each adjacent two groups of distance contacts is 1 mm, and the total length from the first end of the first group of distance contacts 15-1 to the end of the third group of distance contacts 15-3 is 5 mm, so the error range is 5 mm.

[0095] Start detection:

[0096] When the actual distance to be measured is 125 mm:

[0097] Place the device between the two components, move the telescopic button 11 1 mm towards the inside of the device, and move the contact 10 1 mm towards the direction of the circuit substrate 14. At this time, the contact 10 moves to the upper end of the first group of distance contacts 15-1, so that the contact 10 conducts the first group of distance contacts 15-1, at this time the first distance prompt lamp 17 is turned on and emits light, the buzzer 16 rings, the number of times the distance prompt lamp emits light is 1, and the number of times the buzzer rings is 1.

[0098] When the actual distance to be measured is 124mm:

[0099] The telescopic button 11 moves 0-2mm towards the interior of the device, the contact 10 first passes the first set of distance contacts 15-1 and then contacts the second set of distance contacts 15-2. In this process, the first distance prompt light 17 experiences the process of: light off (the contact 10 has not contacted the first set of distance contacts 15-1)-light on (the contact 10 contacts the first set of distance contacts 15-1)-light off (the contact 10 separates from the first set of distance contacts 15-1). The buzzer 16 also emits an alarm sound once. The specific process is: the buzzer 16 is silent-the buzzer 16 alarms-the buzzer 16 is silent. When this situation occurs, the contact 10 is located between the first set of distance contacts 15-1 and the second set of distance contacts 15-2, which indicates that the measured distance is between 124±1mm, the light-on start number of the distance prompt light is 1, and the buzzer's sounding number is 1.

[0100] When the actual distance to be measured is 123mm:

[0101] The telescopic button 11 moves 0-3mm towards the interior of the device, the first distance prompt light 17 experiences the process of: light off (the contact 10 has not contacted the first set of distance contacts 15-1)-light on (the contact 10 contacts the first set of distance contacts 15-1)-light off (the contact 10 separates from the first set of distance contacts 15-1). Then the second distance prompt light 18 is on. The synchronous buzzer 16 experiences the process of: silence-sound-silence-sound again. When this situation occurs, the contact 10 contacts the second set of distance contacts 15-2, which indicates that the measured distance is between 123±1mm, the total light-on start number of all distance prompt lights is 2, and the buzzer's sounding number is 2.

[0102] When the actual distance to be measured is 122mm:

[0103] The telescopic button 11 moves 0-4mm towards the interior of the device, the first distance prompt light 17 experiences the process of: light off (the contact 10 has not contacted the first set of distance contacts 15-1)-light on (the contact 10 contacts the first set of distance contacts 15-1)-light off (the contact 10 separates from the first set of distance contacts 15-1). Then the second distance prompt light 18 is on. The synchronous buzzer 16 experiences the process of: silence-sound-silence-sound again. When this situation occurs, the contact 10 is located between the second set of distance contacts 15-2 and the third set of distance contacts 15-3, which indicates that the measured distance is between 122±1mm, the total light-on start number of all distance prompt lights is 2, and the buzzer's sounding number is 2.

[0104] When the actual distance to be measured is 121mm:

[0105] The telescopic button 11 moves 0-5mm towards the interior of the device, the first distance prompt light 17 experiences: light off (contact 10 has not contacted the first set of distance contacts 15-1)-light on (contact 10 has contacted the first set of distance contacts 15-1)-light off (contact 10 has separated from the first set of distance contacts 15-1). Then the second distance prompt light 18 goes from off to on and then off, and the third distance prompt light 19 goes from off to on. The synchronous buzzer 16 beeps twice intermittently and then beeps long. When this condition occurs, it indicates that the measured distance is between 121±1mm, contact 10 has contacted the third set of distance contacts 15-3, the total number of times that all distance prompt lights have been turned on is 3, the number of times that the buzzer has beeped is 3, and at this time, the buzzer 16 beeps long and the third distance prompt light 19 is on.

[0106] When the actual measured distance is 120mm:

[0107] The telescopic button 11 moves 0-6mm towards the interior of the device, the first distance prompt light 17 experiences: light off (contact 10 has not contacted the first set of distance contacts 15-1)-light on (contact 10 has contacted the first set of distance contacts 15-1)-light off (contact 10 has separated from the first set of distance contacts 15-1). Then the second distance prompt light 18 goes from off to on and then off, and the third distance prompt light 19 goes from off to on and then off. The synchronous buzzer 16 beeps three times intermittently and then is silent. When this condition occurs, it indicates that the measured distance is <121mm, contact 10 has passed through the third set of distance contacts 15-3 and has separated from the third set of distance contacts 15-3, the total number of times that all distance prompt lights have been turned on is 3, the number of times that the buzzer has beeped is 3, and at this time, the buzzer 16 is off and all distance prompt lights are off.

[0108] When the actual measured distance is 126mm or greater, contact 10 does not move towards the interior of the device, contact 10 does not contact any distance contacts, the buzzer 16 does not alarm at all, and the distance prompt lights do not light up.

[0109] In actual application, when the actual distance is greater than or equal to 125mm, then the installation meets the requirements, when the actual distance is between 121mm and 125mm, then the installation can be adjusted to meet the requirements, and when the actual distance is less than 121mm, then the installation does not meet the requirements.

[0110] For detection of a 40.5kV switch cabinet, the total length of the device is adjusted to 300mm in the working state, and the detection process is consistent with the above method, and the distance can be measured between 301mm and 296mm from the natural state.

[0111] If the telescopic button 11 cannot be measured even when it is extended to the maximum range, it indicates that the distance is less than the specified value and does not meet the requirements.

[0112] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for detecting insulation distance, characterized in that, It includes a first telescopic cavity (1), a second telescopic cavity (3) and a third telescopic cavity (5). The second telescopic cavity (3) is embedded inside the first telescopic cavity (1) and can slide along the inside of the first telescopic cavity (1). The third telescopic cavity (5) is embedded inside the second telescopic cavity (3) and can slide along the inside of the second telescopic cavity (3). The third telescopic cavity (5) is provided with a shaft support plate (8). A telescopic button (11) is provided at the end of the third telescopic cavity (5) away from the second telescopic cavity (3). The telescopic button (11) passes through the end of the third telescopic cavity (5) and the shaft support plate (8) in sequence. A telescopic component is sleeved on the telescopic button (11). A limiting surface is provided on the telescopic button (11). One end of the telescopic component abuts against the limiting surface, and the other end abuts against the shaft support plate (8). The shaft support plate (8) is provided with a circuit board (14) on the side away from the telescopic member. The telescopic button (11) is provided with a contact (10) at the end inside the third telescopic cavity (5). The circuit board (14) is provided with several sets of distance contacts (15) and a distance indicator light corresponding to each set of distance contacts (15). When the contact (10) slides, it can contact the distance contact (15). When the contact (10) contacts the distance contact (15), the corresponding distance indicator light is activated. The telescopic component is a telescopic button spring (9), which is sleeved on the telescopic button (11). The telescopic button (11) includes a support rod. One end of the support rod is connected to the button part, and the other end is provided with a contact point (10). The end of the button part connected to the support rod has a limiting surface. The limiting surface is located inside the third telescopic cavity (5). The telescopic button spring (9) is sleeved on the support rod. One end of the telescopic button spring (9) abuts against the shaft support plate (8), and the other end abuts against the limiting surface. Includes the following steps: Based on the standard distance between the two components to be tested, adjust the relative positions between the first telescopic cavity (1), the second telescopic cavity (3), and the third telescopic cavity (5) so that the axial length of the testing device corresponds to the standard distance; Place the testing device between the two components to be tested and begin the testing: If the distance indicator light does not illuminate, it is determined that the actual distance between the two components is greater than the standard distance. If the telescopic button (11) slides into the third telescopic cavity (5), the contact point (10) begins to move along the circuit board (14), and the corresponding distance indicator light illuminates, then it is determined that the actual distance between the two components is less than the standard distance. The determination that the actual distance between the two components is less than the standard distance includes: Set the error range between the actual distance and the standard distance between the two components. Among a number of distance contacts (15), the distance between the distance contact (15) closer to the shaft support plate (8) and the distance contact (15) farther away from the shaft support plate (8) is equal to the error range. When the telescopic button (11) slides into the third telescopic cavity (5) and the contact point (10) begins to move along the circuit board (14), record the number of times the distance indicator light illuminates. When the contact (10) stops moving, if the total number of times all distance indicator lights illuminate is equal to n, and the distance indicator lights are in the off state, it is determined that the difference between the actual distance between the two components and the standard distance is greater than the error range, where n represents the number of groups of distance contacts (15); When contact (10) stops moving, if the total number of times all distance indicator lights illuminate is less than n, or the total number of times all distance indicator lights illuminate is equal to n, and the distance indicator lights are in the on state, it is determined that the difference between the actual distance between the two components and the standard distance is within the error range, including: If the total number of times all distance indicator lights illuminate is less than n, regardless of whether the distance indicator lights are on or off, it indicates that the contact (10) is within the range of all distance contacts (15). When the total number of times all distance indicator lights illuminate is equal to n, and the distance indicator lights are in the on state, it indicates that the contact (10) is still on the last set of distance contacts (15) and has not yet completely separated from the last set of distance contacts (15), proving that the difference between the actual distance between the two components and the standard distance is still within the error range.

2. The method for detecting insulation distance according to claim 1, characterized in that, A buzzer (16) is provided on the circuit board (14), and the buzzer (16) is connected to the distance contact (15).

3. The method for detecting insulation distance according to claim 1, characterized in that, Each set of distance contacts (15) includes two parallel contact points, and the contact (10) can be connected to the two parallel contact points simultaneously.

4. The method for detecting insulation distance according to claim 1, characterized in that, A first button spring (2) is provided at one end inside the second telescopic cavity (3), and the first button spring (2) is used to fix the first telescopic cavity (1) and the second telescopic cavity (3); A second button spring (4) is provided at one end inside the third telescopic cavity (5), and the second button spring (4) is used to fix the second telescopic cavity (3) and the third telescopic cavity (5).

5. The method for detecting insulation distance according to claim 1, characterized in that, The circuit board (14) is provided with a first lithium battery (22) and a second lithium battery (23), both of which are connected to the distance indicator light.

6. The method for detecting insulation distance according to claim 1, characterized in that, It also includes a buzzer (16), which sounds an alarm when the contact (10) is in contact with the distance contact (15), and the circuit is disconnected and the buzzer (16) is turned off when the contact (10) is separated from the distance contact (15). During testing: If the buzzer (16) does not sound an alarm, it is determined that the actual distance between the two components is greater than the standard distance; If the buzzer (16) sounds an alarm, it is determined that the actual distance between the two components is less than the standard distance.

7. The method for detecting insulation distance according to claim 6, characterized in that, The determination that the actual distance between the two components is less than the standard distance includes: Set the error range between the actual distance and the standard distance between the two components. Among a number of distance contacts (15), the distance between the distance contact (15) closer to the shaft support plate (8) and the distance contact (15) farther away from the shaft support plate (8) is equal to the error range. When the telescopic button (11) slides into the third telescopic cavity (5) and the contact (10) begins to move along the circuit board (14), record the number of times the buzzer (16) alarms. When the contact (10) stops moving, if the buzzer (16) is in the off state, the number of alarms of the buzzer (16) is equal to n, and it is determined that the difference between the actual distance between the two components and the standard distance is greater than the error range, where n represents the number of groups of distance contacts (15); When the contact (10) stops moving, the number of alarms of the buzzer (16) is less than n, or the number of alarms of the buzzer (16) is equal to n and the buzzer (16) is in the on state, it is determined that the difference between the actual distance between the two components and the standard distance is within the error range.

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