A high-precision detection unit for insulation detection

Abstract

The present invention relates to the field of insulation detection technology, and specifically to a high-precision detection unit for insulation detection. An elastic switch electrically connected to a detection circuit is arranged on the inner wall of an isolation box, an adjusting dial is arranged in the isolation box, a driving component for driving the adjusting dial to reciprocate is arranged in the isolation box, and a pointed cone and a flat cone distributed vertically are arranged on the arc outer wall of the adjusting dial, and the pointed cone and the flat cone are respectively pressed on the elastic component. The beneficial effect is: by arranging an adjustment device with a pointed cone and a flat cone, it is suitable for insulation detection in both static and working states, reducing the impact on equipment and its components, and cooperating with the analysis and fitting of the detection data, so as to analyze the change trend of the insulation performance of the equipment casing, facilitate effective maintenance or repair, and greatly improve the protection of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of insulation detection, in particular to a high-precision detection unit for insulation detection. Background Art

[0002] The unit's full-state insulation abnormality analysis refers to the automatic analysis of insulation abnormalities found during insulation monitoring of units in operation, cold standby, hot standby, and test states. At present, similar products only judge whether the insulation is normal based on the resistance value, and the influence of environmental factors is not ruled out, resulting in a high probability of false alarms.

[0003] The existing patent CN221686500U discloses a metal shell insulation resistance detection mechanism, including a resistance detection mechanism body, the resistance detection mechanism body including a detection device and a moving device, the detection device is used to detect the insulation resistance of the metal shell insulation, the moving device is used to move the metal shell insulation without direct contact, the detection device includes a workbench, an ohmmeter, a test pen, and a power controller. The present invention moves the metal shell insulation in, the metal shell insulation is moved onto the current table, the metal shell insulation contacts the test pen, the power controller starts the current to concentrate on the current table, the current is transferred to the metal shell insulation, the test pen transfers the current on the metal shell insulation, the ohmmeter detects the current on the metal shell insulation, when the voltage on the current table is too high, the control rod pops out, the conduit inside the shunt tube leads the current of the current table out, and the safety of the protection device is protected.

[0004] During the insulation monitoring process, multiple repeated tests are required to analyze the insulation performance of the equipment casing based on the changes in the test data. However, it is difficult for existing equipment to achieve multiple insulation tests, and during the test process, multiple power-on test resistances will affect the operation of the equipment. Summary of the invention

[0005] The object of the present invention is to provide a high-precision detection unit for insulation detection to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A high-precision detection unit for insulation detection comprises a detection device, wherein the detection device comprises a control host, wherein the input end of the control host is respectively connected to a working detection unit for detecting the insulation of a device housing when the device housing is working and a static detection unit for detecting the insulation of the device housing when the device housing is stationary, wherein an isolation box is arranged on the other side of the detection device, wherein a detection circuit connected to the device housing is arranged in the isolation box, wherein an output end of the detection circuit is elastically extruded and connected to the working detection unit and the static detection unit by an elastic component, wherein an elastic switch electrically connected to the detection circuit is arranged on the inner wall of the isolation box, wherein an adjustment dial is arranged in the isolation box, wherein a driving component for driving the adjustment dial to reciprocate is arranged in the isolation box, wherein a pointed cone and a flat cone distributed vertically are arranged on the arc outer wall of the adjustment dial, wherein the pointed cone and the flat cone are respectively pressed onto the elastic component.

[0008] Preferably, a protector connected to the detection circuit is provided in the isolation box, the protector includes an isolation resistor and a vacuum relay, a built-in power supply is provided in the detection circuit, the working detection unit and the static detection unit are symmetrically distributed up and down, and the elastic switch of the detection circuit is distributed vertically to the working detection unit and the static detection unit.

[0009] Preferably, a pair of right-angle inner tubes extending at right angles are arranged between the detection device and the isolation box, a sliding rod is slidably inserted into one end of the pair of right-angle inner tubes, the other end of the right-angle inner tubes faces the adjustment dial, and an elastic component is slidably inserted into the port of the right-angle inner tube, and one side of the working detection unit and the static detection unit are electrically provided with a connecting cable, the connecting cable faces the sliding rod, and a connecting seat is arranged at one end of the connecting cable close to the sliding rod, and a connecting head which cooperates with the connecting seat and is electrically connected to the connecting seat is arranged at one end of the sliding rod, and the other end of the sliding rod is electrically connected to the detection circuit through a cable extending to the outside of the right-angle inner tube.

[0010] Preferably, the elastic component includes a piston rod and a rotating seat, one end of the piston rod is slidably inserted in the right-angle inner tube, the other end of the piston rod faces the adjusting dial and is connected to the rotating seat, the rotating seat is provided with a pressure wheel pressed with the adjusting dial, the piston rod is sleeved with a first spring, the first spring is pressed between the right-angle inner tube and the rotating seat, pistons are provided on the piston rod and the sliding rod, and the pistons are slidably fitted with the inner wall of the right-angle inner tube.

[0011] Preferably, a resiliently mounted trigger rod is provided on one side of the elastic switch, one end of the trigger rod faces the elastic switch, the other end of the trigger rod is provided with a pressure wheel facing the adjusting dial, and a third spring is sleeved in the middle of the trigger rod.

[0012] Preferably, the driving assembly includes a lower gear, a telescopic rod and a tooth plate, an isolation bottom frame is provided at the front end of the lower end of the isolation box, a lower horizontal axis is rotatably mounted on a bearing on the isolation bottom frame, an adjusting motor is connected to the front end of the lower horizontal axis, the adjusting turntable is fixedly sleeved on the lower horizontal axis, a lower gear is fixedly sleeved on the rear end of the lower horizontal axis, the adjusting turntable and the lower gear are staggered front and back, and a tooth plate driven vertically up and down by the telescopic rod is provided at the upper end of the isolation box, and the lower end of the tooth plate is meshingly connected to the lower gear.

[0013] Preferably, a guide groove is provided on the inner wall of the isolation box, and a side strip which is slidably plugged in and cooperates with the guide groove is provided on the rear side wall of the tooth plate.

[0014] Preferably, the upper end of the isolation box is provided with an upper horizontal axis with adjustable height and located directly in front of the tooth plate, an upper gear meshing with the tooth plate is fixedly sleeved on the upper horizontal axis, and limit frames are provided at both ends of the upper horizontal axis. The limit frames are installed on the inner wall of the isolation box, and a coil spring is provided in the limit frame, and the two ends of the coil spring are respectively fixed on the upper horizontal axis and the limit frame.

[0015] Preferably, the arc outer wall of the upper horizontal axis and the inner wall of the limit frame are provided with slots, the inner and outer ends of the coil spring are respectively connected to the slots of the upper horizontal axis and the limit frame, the limit frame is vertically connected with an adjusting rod, and a pair of ear seats are symmetrically provided on the inner wall of the isolation box, and the other end of the adjusting rod is fixed on the ear seat.

[0016] Preferably, a pair of vertically distributed expansion grooves are provided on the arc outer wall of the adjusting dial, one end of the pointed cone and the flat cone are slidably inserted in the expansion groove, and the other end of the pointed cone and the flat cone extends to the outside of the adjusting dial, and a threaded retaining ring is provided at the port position of the expansion groove, and a second spring is pressed between the end portions of the pointed cone and the flat cone and the expansion groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention is adapted to insulation detection in both static and working states by arranging an adjustment device with a pointed cone and a flat cone, thereby reducing the impact on the equipment and its components, and cooperating with the analysis and fitting of the detection data to analyze the change trend of the insulation performance of the equipment casing, thereby facilitating effective maintenance or repair and greatly improving the protection of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of insulation detection of the equipment in the working state of the present invention;

[0020] Figure 2 It is a structural schematic diagram of insulation detection of the device of the present invention in a static state;

[0021] Figure 3It is a schematic diagram of the installation structure of the adjustment dial of the present invention;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the upper gear installation of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the assembly of the tooth plate and the upper gear of the present invention;

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the piston rod of the present invention;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the adjusting turntable of the present invention;

[0026] Figure 8 This is a schematic diagram of a three-dimensional structure in which the adjusting dial of the present invention is installed on the lower horizontal axis.

[0027] In the figure: 1. detection device; 2. control host; 3. isolation box; 4. working detection unit; 5. static detection unit; 6. connecting cable; 7. sliding rod; 8. right-angle inner tube; 9. protector; 10. adjusting dial; 11. piston rod; 12. flat cone; 13. pointed cone; 15. elastic switch; 16. trigger rod; 17. pressure wheel; 18. detection circuit; 19. connector; 20. connecting seat; 21. piston; 22. first spring; 23. retaining ring; 24. telescopic slot; 25. second spring; 27. rotating seat; 28. third spring; 29. ​​lower horizontal axis; 30. adjusting motor; 31. isolation bottom frame; 32. guide groove; 33. lower gear; 34. ear seat; 35. telescopic rod; 36. tooth plate; 37. upper gear; 38. adjusting rod; 39. limit frame; 40. upper horizontal axis; 41. coil spring; 42. slot. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 8 , the present invention provides a technical solution:

[0030] A high-precision detection unit for insulation detection comprises a detection device 1, wherein the detection device 1 comprises a control host 2, wherein the input end of the control host 2 is respectively connected to a working detection unit 4 for detecting the insulation of the device housing when working and a static detection unit 5 for detecting the insulation of the device housing when stationary, an isolation box 3 is arranged on the other side of the detection device 1, wherein a detection circuit 18 connected to the device housing is arranged in the isolation box 3, wherein a protector 9 connected to the detection circuit 18 is arranged in the isolation box 3, wherein the protector 9 comprises an isolation resistor and a vacuum relay, and wherein the detection circuit 18 is provided with a built-in power supply.

[0031] During the detection process, first select the detection unit according to the status of the equipment, use the adjustment dial 10 to select a group of the working detection unit 4 and the static detection unit 5, and then connect the detection circuit 18 to the equipment casing. At this time, the detection circuit 18 is powered by the built-in power supply, and the resistance of the equipment casing is detected to determine its insulation, and the detection data is recorded in time. The sensor in the detection circuit 18 is used to detect the ambient temperature and humidity, record the data and analyze the influence of the ambient temperature and humidity on the resistance of the equipment casing.

[0032] A big data model is established for the ambient temperature and humidity during all insulation resistance tests. The fault type is automatically analyzed through the big data model. The system will continuously add different waveform data for unsupervised training to improve the accuracy of judgment. At the same time, the system can establish a big data model of the temperature, humidity, and resistance value during each test since operation. Subsequent test data can automatically determine the impact of factors such as ambient temperature and humidity on the insulation status of the unit and determine the method of troubleshooting. The specific instructions are as follows:

[0033] Timing model establishment:

[0034] Assumptions is the time series of the motor insulation status abnormality that is not detected, then {ST} is expressed by the ARIMA model as:

[0035] (1)

[0036] in (2)

[0037] (3)

[0038] In the formula, is a smooth operator: is a reversible operator; It is the abbreviation of 1-B, where B is the delay operator; They are , The sun-facing parameters; To satisfy the normal distribution Noise sequence points.

[0039] Assumptions is an observed time series with noise points or missing values; then the ARIMA model with noise points and missing values ​​at time T can be divided into two models:

[0040] ①Continuous outlier model (assuming there is a continuous anomaly at time t)

[0041] (4)

[0042] (5)

[0043] (6)

[0044] In the formula is an indicator function used to describe whether there is an outlier at time t. For the impact of persistent outliers on time series, equations (4), (5), and (6) show that and the entire time series after time t , will be affected by this outlier.

[0045] ② Independent outlier model (assuming is a time series with persistent outliers at time T, and this model is affected by independent outliers)

[0046] (7)

[0047] Formula (7) indicates that when an independent outlier intervenes, it only affects the sequence value at time T and has no effect on other sequence values. Therefore, this type of value is defined as an independent outlier.

[0048] Detection and correction of noise points and missing values:

[0049] (8)

[0050] (9)

[0051] Formula (8) is the calculation formula for the impact of continuous outliers on the insulation status data sequence, and formula (7) is the calculation formula for the impact of independent outliers on the insulation status data sequence. is the fitting error of the model; is the operator affected by the residual; for The fitting error of the term.

[0052] The detection of outliers can be obtained by calculating the detection statistic of the independent and persistent outlier model. The formula is as follows:

[0053] (10)

[0054] (11)

[0055] (12)

[0056] In the formula, , Represents the test statistics of independent and persistent outliers respectively for The series variance is the series variance of the j-th term.

[0057] like or At time t0, it is greater than the set value C. In this state, there are no two types of outliers in the data series. In summary, the observed time series can be affected by different types of anomalies at different times. These data can be corrected by combining equations (6) and (7).

[0058] The group regression model (AR model) of time series has a strong memory, which is similar to the status data of the equipment. For stable series, the AR model can be used directly for matching. For other periodic series such as temperature, humidity, etc., the corresponding fitting can also be performed by removing the period. The formula is as follows:

[0059] (13)

[0060] In the formula, is the time series of insulation detection data, is the fitting coefficient, which is less than 1. is a normally distributed sequence.

[0061] Similarity determination: Using a self-organizing neural network (SOM) is to use unsupervised learning to allow each neuron to compete and match the input pattern, and finally generate a neuron. This unsupervised learning method is used to train and output the screened insulation test data, eliminating the constraints of prior knowledge and is suitable for a large number of insulation test data with unobtrusive characteristics. This algorithm needs to classify the resistance values ​​tested at the same time, and group the resistance values ​​at the same temperature and humidity to ensure the similarity of the collection environment.

[0062] The unsupervised learning algorithm of the self-organizing neural network can analyze the tightness of the historical curve itself, which can quickly reflect sudden insulation failures; however, in the actual operation of the unit equipment, insulation aging is generally slow, and the autoregressive model is generally not easy to detect. This requires comparative analysis with the insulation data under the historical normal state, and compare the difference between the two curves. Since the insulation status data of the unit is mostly based on time series, and in a short period of time, the difference in the status data time series of each sampling cycle is very small. Euclidean distance is positioned as the absolute distance between two points in any dimensional space, which is a common distance definition; in many cases, Euclidean distance is used to measure the similarity of signals. The smaller the Euclidean distance, the higher the similarity of the signals. The Euclidean distance formula of the two curves at time t is:

[0063] (14)

[0064] Where d is the Euclidean distance between the two curves; x and y are the values ​​of the two curves at a certain moment. The three parameters d, x, and y must be collected at the same moment.

[0065] For curves with similar values, it is inaccurate to use only Euclidean distance to evaluate similarity. Therefore, the similarity should be calculated. The formula is as follows:

[0066] (15)

[0067] (16)

[0068] In the formula , are the two sequences to be tested for similarity; for The minimum multiple of ; For similarity.

[0069] Insulation abnormality analysis steps:

[0070] 1. According to the existing test resistance values, classify them into temperature and humidity groups and establish the initial model.

[0071] 2. Determine the anomaly type and divide it into independent and continuous outlier value types according to its characteristics, and pre-process the data.

[0072] 3. Using the preprocessed data obtained in the previous step, calculate its fit using the unsupervised algorithm of the self-organizing neural network.

[0073] 4. Use the values ​​that meet the conditions obtained in the previous step to compare and analyze with the initial model, calculate their Euclidean distance, and determine the similarity of the time series.

[0074] 5. Comprehensively evaluate the insulation status of the unit based on the degree of fit and similarity under Euclidean distance:

[0075] ① If it is concluded from step 2 that there is an independent abnormal point (the resistance value decreases, and the resistance value in the historical data under similar acquisition environment also decreases), it is determined that the alarm is not effective and the unit needs to open the dehumidification board to dehumidify the unit;

[0076] ② If there is no independent abnormal point (resistance value decreases, while resistance value increases or remains unchanged under similar acquisition environment in historical data), its fit degree is less than zero, and the Euclidean distance calculation result with historical data exceeds the preset range, then it is judged that this alarm is effective and the machine needs to be shut down for maintenance;

[0077] ③ After the above process, if no abnormal points are found and the fit degree does not show a result less than zero, and the Euclidean distance calculation result with the corresponding historical curve is within the allowable deviation range, it is judged that the unit can operate normally.

[0078] The output end of the detection circuit 18 is elastically extruded and connected to the working detection unit 4 and the static detection unit 5 through an elastic component. An elastic switch 15 electrically connected to the detection circuit 18 is arranged on the inner wall of the isolation box 3. An adjusting dial 10 is arranged in the isolation box 3. A driving component for driving the adjusting dial 10 to reciprocate is arranged in the isolation box 3. A pointed cone 13 and a flat cone 12 are vertically distributed on the arc outer wall of the adjusting dial 10. The pointed cone 13 and the flat cone 12 are respectively pressed on the elastic component. The working detection unit 4 and the static detection unit 5 are symmetrically distributed up and down. The elastic switch 15 of the detection circuit 18 is vertically distributed to the working detection unit 4 and the static detection unit 5.

[0079] Since the status of the equipment is different in the static and working states, when it is in the static state, the equipment is not powered. Therefore, during the continuous detection process, multiple intermittent power supply to the equipment casing is likely to cause changes in the casing performance. The equipment in the working state is in a powered state. Continuous power supply to the equipment casing will cause mutual electromagnetic influences, causing damage to the charged components inside the equipment and causing instability in the detection circuit 18. Therefore, the requirements for continuous insulation detection in the working state and the static state are different.

[0080] During the working detection process, the flat-headed cone 12 is pressed onto the elastic component corresponding to the working detection unit 4, and the pointed-headed cone 13 is pressed onto the front end of the elastic switch 15. By reciprocating and cyclically driving the adjusting dial 10, intermittent insulation detection of the device housing is realized. During the reciprocating rotation process, the adjusting dial 10 is driven by the driving component to slightly deflect. As the adjusting dial 10 rotates, the flat-headed cone 12 is continuously pressed onto the elastic component during the rotation process, thereby ensuring that the detection circuit 18 is continuously electrically connected to the working detection unit 4. As the pointed-headed cone 13 reciprocates, it is intermittently pressed onto the elastic switch 15, thereby intermittently touching the elastic switch 15, thereby controlling the intermittent power supply of the detection circuit 18. Therefore, during the detection process, the device housing is energized only during a period of detection, and is not energized during the intermittent period.

[0081] During the static detection process, the adjusting motor 30 is used to drive the adjusting dial 10 to adjust the angle, so that the flat-head cone 12 is pressed onto the elastic switch 15, and the pointed-head cone 13 is pressed onto the elastic component corresponding to the static detection unit 5. The driving component drives the adjusting dial 10 to deflect slightly. As the adjusting dial 10 deflects back and forth, the detection circuit 18 continues to supply power to the device casing, and the detection circuit 18 is intermittently connected to the static detection unit 5 in a point-contact manner.

[0082] In this way, intermittent insulation detection of the equipment casing is realized. The detection data is analyzed and a curve is fitted by controlling the host 2. Based on the data analysis, the insulation changes of the equipment casing can be judged or predicted, especially the continuous impact of temperature and humidity on the performance of the equipment casing. With the influence of temperature and humidity, the equipment casing is oxidized and rusted, causing its performance to change slowly, and then causing its insulation to change slowly. Based on the collected data, the direction of the change can be judged and the trend of the change can be predicted, so as to facilitate timely maintenance or environmental adjustment, thereby avoiding safety accidents such as leakage and electric shock.

[0083] Example 2: On the basis of Example 1, the electrical connection between the detection circuit 18 and the working detection unit 4 and the static detection unit 5 is an elastic extrusion connection, and a pair of right-angle inner tubes 8 extending at right angles are arranged between the detection device 1 and the isolation box 3. A sliding rod 7 is slidably inserted at one end of the pair of right-angle inner tubes 8, and the other end of the right-angle inner tube 8 is opposite to the adjustment dial 10, and an elastic component is slidably inserted at the port of the right-angle inner tube 8. A connecting cable 6 is electrically arranged on one side of the working detection unit 4 and the static detection unit 5. The connecting cable 6 is opposite to the sliding rod 7, and a connecting seat 20 is arranged at one end of the connecting cable 6 close to the sliding rod 7. A connecting head 19 that cooperates with and is electrically connected to the connecting seat 20 is arranged at one end of the sliding rod 7, and the other end of the sliding rod 7 is electrically connected to the detection circuit 18 through a cable extending to the outside of the right-angle inner tube 8.

[0084] Through the cooperation of the sliding rod 7 and the connecting cable 6, the lateral plug-in installation of the connecting seat 20 and the connecting head 19 is achieved.

[0085] The elastic component includes a piston rod 11 and a rotating seat 27. One end of the piston rod 11 is slidably inserted in the right-angle inner tube 8. The other end of the piston rod 11 faces the adjusting dial 10 and is connected to the rotating seat 27. The rotating seat 27 is provided with a pressure wheel 17 pressed with the adjusting dial 10. A first spring 22 is sleeved on the piston rod 11. The first spring 22 is pressed between the right-angle inner tube 8 and the rotating seat 27. A piston 21 is provided on the piston rod 11 and the sliding rod 7. The piston 21 slides and fits with the inner wall of the right-angle inner tube 8.

[0086] By setting the right-angle inner tube 8 and the piston 21, the piston rod 11 and the sliding rod 7 are linked through the right-angle inner tube 8. By adjusting the turntable 10 to squeeze the piston rod 11, the internal pressure of the right-angle inner tube 8 is increased, driving the sliding rod 7 to slide outward, thereby realizing the electrical connection between the connecting seat 20 and the connecting head 19. When the pressure of the piston rod 11 disappears, under the reset elastic force of the first spring 22, the sliding rod 7 slides into the right-angle inner tube 8, so that the connecting seat 20 and the connecting head 19 are disconnected.

[0087] A resiliently mounted trigger rod 16 is disposed on one side of the elastic switch 15 , one end of the trigger rod 16 faces the elastic switch 15 , the other end of the trigger rod 16 is disposed with a pressure wheel 17 facing the adjustment dial 10 , and a third spring 28 is sleeved in the middle of the trigger rod 16 .

[0088] By arranging the third spring 28 and the trigger rod 16 to cooperate, the trigger rod 16 can be elastically installed horizontally, and then the horizontal position of the trigger rod 16 can be controlled by adjusting the squeezing of the turntable 10 to control the opening and closing of the elastic switch 15.

[0089] In the actual detection process, the pointed cone 13 and the flat cone 12 on the adjusting dial 10 squeeze the pressure wheel 17, so that the trigger rod 16 and the piston rod 11 are squeezed to achieve the connection of the circuit. When the adjusting dial 10 deviates from the rotation, it is reset under the action of the spring to achieve the purpose of disconnecting the circuit and realize the control of the circuit.

[0090] Example 3: On the basis of Example 2, in order to achieve a small reciprocating drive of the adjusting turntable 10 and a 90-degree workstation angle adjustment, and make it relatively independent, the present application includes the following structure: a driving assembly includes a lower gear 33, a telescopic rod 35 and a tooth plate 36, an isolation bottom frame 31 is provided at the front end of the lower end of the isolation box 3, a lower horizontal shaft 29 is rotatably mounted on the bearing on the isolation bottom frame 31, an adjusting motor 30 is connected to the front end of the lower horizontal shaft 29, the adjusting turntable 10 is fixedly sleeved on the lower horizontal shaft 29, and the rear end of the lower horizontal shaft 29 is fixedly sleeved with a lower gear 33, the adjusting turntable 10 and the lower gear 33 are staggered front and back, and a tooth plate 36 driven vertically up and down by a telescopic rod 35 is provided at the upper end of the isolation box 3, and the lower end of the tooth plate 36 is meshed and connected with the lower gear 33.

[0091] By driving the telescopic rod 35 up and down, the tooth plate 36 is engaged with the lower gear 33, thereby driving the lower horizontal shaft 29 to rotate slightly, realizing the deflection of the adjustment turntable 10 and realizing reciprocating motion. When the tooth plate 36 rises to separate from the lower gear 33, the lower horizontal shaft 29 is driven by the adjustment motor 30 to realize the adjustment of the work station angle. The work station angle adjustment is relatively independent of the reciprocating deflection and will not affect each other.

[0092] Example 4: On the basis of Example 3, in order to control the angle of reciprocating deflection and ensure that the angle of each deflection is the same, thereby ensuring that the time interval of intermittent detection is the same and improving the accuracy of the data, a guide groove 32 is provided on the inner wall of the isolation box 3, and a side strip that is slidably connected with the guide groove 32 is provided on the rear side wall of the tooth plate 36.

[0093] By setting the lifting position of the guide groove 32 relative to the tooth plate 36, the vertical and stable lifting is ensured.

[0094] The upper end of the isolation box 3 is provided with an upper horizontal axis 40 with adjustable height and located directly in front of the tooth plate 36. The upper horizontal axis 40 is fixedly sleeved with an upper gear 37 meshing with the tooth plate 36. Limit frames 39 are provided at both ends of the upper horizontal axis 40. The limit frames 39 are installed on the inner wall of the isolation box 3. A coil spring 41 is provided in the limit frame 39, and the two ends of the coil spring 41 are respectively fixed on the upper horizontal axis 40 and the limit frame 39.

[0095] By setting the meshing of the upper gear 37 and the tooth plate 36, the tooth plate 36 is used to drive the upper horizontal shaft 40 to rotate. A coil spring 41 is provided on the upper horizontal shaft 40, and the coil spring 41 is used to control the rotation angle of the upper horizontal shaft 40. When the coil spring 41 is fully wound, the upper horizontal shaft 40 cannot rotate, so that the upper gear 37 and the tooth plate 36 cannot mesh with each other, thereby achieving the purpose of controlling the descending height of the tooth plate 36 and limiting the descending height of the tooth plate 36.

[0096] A slot 42 is provided on the arc outer wall of the upper horizontal axis 40 and the inner wall of the limit frame 39. The inner and outer ends of the coil spring 41 are respectively connected to the slots 42 of the upper horizontal axis 40 and the limit frame 39. The limit frame 39 is vertically connected to the adjustment rod 38. A pair of ear seats 34 are symmetrically provided on the inner wall of the isolation box 3, and the other end of the adjustment rod 38 is fixed on the ear seat 34.

[0097] By setting an adjustment rod 38 to connect the limit frame 39, the height of the upper horizontal axis 40 can be adjusted so that the upper horizontal axis 40 and the upper gear 37 are adapted to the height of the tooth plate 36 to avoid falling off.

[0098] A pair of vertically distributed expansion grooves 24 are provided on the arc outer wall of the adjusting dial 10, one end of the pointed cone 13 and the flat cone 12 are slidably inserted in the expansion groove 24, and the other end of the pointed cone 13 and the flat cone 12 extends to the outside of the adjusting dial 10, and a threaded retaining ring 23 is provided at the port position of the expansion groove 24, and a second spring 25 is pressed between the end portions of the pointed cone 13 and the flat cone 12 and the expansion groove 24.

[0099] Since the deflection of the flat-head cone 12 during the deflection process will cause continuous squeezing of the piston rod 11 or the trigger rod 16, which may easily cause excessive squeezing of the elastic switch 15 or the connecting seat 20, a second spring 25 is provided to achieve elastic storage of the pointed cone 13 and the flat-head cone 12, avoid excessive squeezing, and improve protection of the circuit connection.

[0100] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision detection unit for insulation detection, comprising a detection device (1), the detection device (1) comprising a control host (2), the input end of the control host (2) being respectively connected to a working detection unit (4) for detecting the insulation of the device housing when it is working and a static detection unit (5) for detecting the insulation of the device housing when it is static, an isolation box (3) being arranged on the other side of the detection device (1), the isolation box (3) being arranged with a detection circuit (18) connected to the device housing, characterized in that: The output end of the detection circuit (18) is elastically extruded and connected to the working detection unit (4) and the static detection unit (5) through an elastic component; an elastic switch (15) electrically connected to the detection circuit (18) is provided on the inner wall of the isolation box (3); an adjustment dial (10) is provided in the isolation box (3); a driving component for driving the adjustment dial (10) to reciprocate is provided in the isolation box (3); a pointed cone (13) and a flat cone (12) distributed vertically are provided on the arc outer wall of the adjustment dial (10); the pointed cone (13) and the flat cone (12) are respectively pressed on the elastic component. The isolation box (3) is provided with a protector (9) connected to the detection circuit (18), the protector (9) comprising an isolation resistor and a vacuum relay, the detection circuit (18) is provided with a built-in power supply, the working detection unit (4) and the static detection unit (5) are symmetrically distributed up and down, and the elastic switch (15) of the detection circuit (18) is vertically distributed with the working detection unit (4) and the static detection unit (5); a pair of right-angle inner tubes (8) extending at right angles are provided between the detection device (1) and the isolation box (3), one end of the pair of right-angle inner tubes (8) is slidably plugged with a sliding rod (7), and the right-angle The other end of the inner tube (8) faces the adjustment dial (10), and the port of the right-angle inner tube (8) is slidably plugged with an elastic component. One side of the working detection unit (4) and the static detection unit (5) are both electrically provided with a connection cable (6), the connection cable (6) faces the sliding rod (7), and one end of the connection cable (6) close to the sliding rod (7) is provided with a connection seat (20), and one end of the sliding rod (7) is provided with a connector (19) that is sleeved and electrically connected to the connection seat (20), and the other end of the sliding rod (7) is electrically connected to the detection circuit (18) through a cable extending to the outside of the right-angle inner tube (8); The elastic component comprises a piston rod (11) and a rotating seat (27), one end of the piston rod (11) is slidably inserted in the right-angle inner tube (8), the other end of the piston rod (11) faces the adjusting turntable (10) and is connected to the rotating seat (27), a pressing wheel (17) pressed with the adjusting turntable (10) is provided on the rotating seat (27), a first spring (22) is sleeved on the piston rod (11), and the first spring (22) is pressed between the right-angle inner tube (8) and the rotating seat (27). 7), a piston (21) is disposed on the piston rod (11) and the sliding rod (7), and the piston (21) is slidably fitted with the inner wall of the right-angle inner tube (8); a trigger rod (16) is elastically mounted on one side of the elastic switch (15), one end of the trigger rod (16) is directly opposite to the elastic switch (15), and a pressure wheel (17) is disposed on the other end of the trigger rod (16) and is directly opposite to the adjusting dial (10), and a third spring (28) is sleeved in the middle of the trigger rod (16); The driving assembly comprises a lower gear (33), a telescopic rod (35) and a toothed plate (36); an isolation bottom frame (31) is arranged at the front end of the lower end of the isolation box (3); a lower horizontal shaft (29) is rotatably mounted on a bearing on the isolation bottom frame (31); an adjusting motor (30) is connected to the front end of the lower horizontal shaft (29); the adjusting dial (10) is fixedly sleeved on the lower horizontal shaft (29); a lower gear (33) is fixedly sleeved on the rear end of the lower horizontal shaft (29); the adjusting dial (10) and the lower gear (33) are staggered in front and back; a toothed plate (36) is arranged at the upper end of the isolation box (3) and is driven to rise and fall vertically by the telescopic rod (35); the lower end of the toothed plate (36) meshes with the lower gear (33) The isolation box (3) is connected with the tooth plate (36) by a guide groove (32) on the inner wall thereof, and a side bar slidably plugged with the guide groove (32) is provided on the rear side wall of the tooth plate (36); the isolation box (3) is provided with an upper horizontal axis (40) at the upper end thereof, which is adjustable in height and located directly in front of the tooth plate (36); an upper gear (37) meshingly connected with the tooth plate (36) is fixedly sleeved on the upper horizontal axis (40); limit frames (39) are provided at both ends of the upper horizontal axis (40); the limit frames (39) are mounted on the inner wall of the isolation box (3); a coil spring (41) is provided in the limit frame (39); and the two ends of the coil spring (41) are respectively fixed on the upper horizontal axis (40) and the limit frame (39).

2. A high-precision detection unit for insulation detection according to claim 1, characterized in that: A slot (42) is provided on the arc outer wall of the upper horizontal axis (40) and the inner wall of the limit frame (39); the inner and outer ends of the coil spring (41) are respectively connected to the slots (42) of the upper horizontal axis (40) and the limit frame (39); the limit frame (39) is vertically connected to an adjustment rod (38); a pair of ear seats (34) are symmetrically provided on the inner wall of the isolation box (3); the other end of the adjustment rod (38) is fixed to the ear seat (34).

3. A high-precision detection unit for insulation detection according to claim 2, characterized in that: A pair of vertically distributed telescopic grooves (24) are provided on the arc outer wall of the adjusting dial (10); one end of the pointed cone (13) and the flat cone (12) are slidably inserted into the telescopic groove (24); the other ends of the pointed cone (13) and the flat cone (12) extend to the outside of the adjusting dial (10); a threaded retaining ring (23) is provided at the end of the telescopic groove (24); and a second spring (25) is pressed between the ends of the pointed cone (13) and the flat cone (12) and the telescopic groove (24).

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