Electrical variable measuring equipment for electromechanical power distribution cabinet

Abstract

The invention belongs to the technical field of electrical equipment measurement, and particularly relates to electrical variable measurement equipment for an electromechanical power distribution cabinet, which comprises a power distribution cabinet, the power distribution cabinet is composed of a box body and a box door, and a main body unit for detection is detachably arranged at the junction of the box body and the box door of the power distribution cabinet. A portable unit is arranged at one end, far away from the box door, of the main body unit, a locking unit is arranged on the portable unit, an adjusting unit is further arranged on the portable unit, and a common-frequency unit used for improving the detection precision is arranged on the adjusting unit; according to the invention, the vibration frequency of the telescopic detector is coordinated at the vertical operation position of the partition cylinder through the coordination of the reset spring and the damping spring, and the consistency of the vibration frequency between the telescopic detector and the to-be-detected vibration device is further realized through the sliding fit between the telescopic detector and the vibration reduction frame; the purpose of relatively static electrical variable detection is achieved, and the accuracy of measured data is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of electric equipment measurement, and in particular relates to an electric variable measuring device for an electromechanical power distribution cabinet. Background Art

[0002] An electrical variable measuring device is a measuring instrument that compares the electrical quantity or electrical parameter being measured with an electrical standard or provides an accurate ratio;

[0003] Although most of the existing electromechanical distribution cabinets adopt a closed structure design, the operating environment of the distribution cabinet is usually more complex and the inspection cycle of the distribution cabinet is longer. Therefore, it is inevitable that there will be some dust, oil smoke, metal dust and various charged particles on the end faces of the components inside the distribution cabinet, especially in the wiring area of ​​the terminal block;

[0004] However, the existing electrical variable measurement equipment generally has high requirements for the environment. Dust, oil smoke, metal dust and various charged particles in the wiring area of ​​the terminal block not only easily cause uneven heat dissipation of the equipment, but also form additional microcircuit effects in the circuits inside the equipment, which in turn leads to slow corrosion and even breakdown discharge problems, misleading the test results of the electrical variable measurement equipment, affecting the collection of test data, and is not conducive to scientific and safe use of electricity.

[0005] Conventional distribution cabinet inspection is usually carried out in a live environment to avoid adverse effects of shutdown on production power supply. Therefore, there is usually vibration of electronic components in the inspection environment. Existing electrical variable measurement equipment usually directly uses the detection end to measure and detect data on the wiring terminals in the distribution cabinet. However, the instantaneous contact between the detection end and the wiring terminals causes the acceleration of the detection end to increase, which in turn causes the detection end to continuously collide with the wiring terminals during the inspection process, which not only damages electronic components and causes waste of materials, but is also prone to instantaneous short circuits, which is not conducive to the accurate collection of measurement data, and is also prone to discharge, posing certain safety hazards. Summary of the invention

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an electric variable measuring device for an electromechanical power distribution cabinet, comprising a power distribution cabinet, the power distribution cabinet being composed of a box body and a box door, a main unit for detection being detachably provided at the junction of the box body and the box door, a portable unit being provided at one end of the main unit away from the box door, a locking unit being provided on the portable unit, an adjustment unit being further provided on the portable unit, and a frequency-matching unit being provided on the adjustment unit for improving the detection accuracy;

[0007] The same frequency unit comprises:

[0008] Two sliding seats are symmetrically arranged on the adjustment unit;

[0009] A key plate, fixedly mounted on the bottom wall of each sliding seat;

[0010] Guide rods, three in a group, are evenly installed in the middle of the bottom end of each key plate;

[0011] A sealing plate is fixedly installed in a through-type manner at the middle position of the outer wall of each group of guide rods;

[0012] A return spring is sleeved on the outer wall of each guide rod and is located at the top of the sealing plate and is fixedly connected to the sealing plate;

[0013] A rubber sleeve column, fixedly mounted on the bottom ends of two guide rods in each group of guide rods, away from the middle of the sealing plate;

[0014] A ring piece, fixedly mounted on the outer wall of the bottom end of the guide rod located in the middle position of each group of guide rods;

[0015] The partition cylinder is slidably mounted on the bottom end of the guide rod at the same position as the ring piece;

[0016] The shock-absorbing spring is fixedly installed at the middle position of the top surface of the partition tube and is movably installed with the outer wall of the guide rod.

[0017] Preferably, locking wall panels are symmetrically installed on the top and bottom ends of the box body, heat-conducting fans are symmetrically installed on the inner walls on both sides of the box body, and an overload compartment fixedly connected to the box body is provided at the bottom end of each of the heat-conducting fans, drainage pipes are installed between the overload compartments, and the bottom ends of the drainage pipes pass through the outer walls of the bottom ends on both sides of the box body, a switch component is provided inside the box body, and terminal blocks fixedly connected to the box body are provided around the switch component, and a repair bracket with a round-shaped structure is provided on the outer side of the end surface of the box body close to the box cover.

[0018] Preferably, the main unit comprises:

[0019] The protective base plate is slidably mounted on the end surface of one side of the repair bracket close to the cover of the power distribution cabinet;

[0020] The handle plate is fixedly installed at the middle position of the end surface of the protective base plate close to the box cover; the lifting slot is opened at the middle position of the end surface of the protective base plate away from the box cover;

[0021] The locking bolts are symmetrically distributed at both ends of the protective base plate and are installed in threaded cooperation with the protective base plate;

[0022] The lifting platform is slidably mounted inside the lifting slot; the guide slot is provided at the middle position of the end surface of the lifting platform away from the protective base plate;

[0023] The T-shaped base is symmetrically slidably engaged in the guide groove;

[0024] Two U-shaped magnets are symmetrically and fixedly installed at the top end of the lifting platen on the side away from the partition substrate.

[0025] Preferably, the portable unit includes:

[0026] The lifting beam frame has an L-shaped cross-section. Three of them are in a group and are evenly installed at the bottom end of the end face of each T-shaped base on the side away from the partition substrate;

[0027] The sound-absorbing board is fixedly installed at the top of each group of the lifting beam frames, and the end of the sound-absorbing board close to the partition substrate is chamfered in an arc shape;

[0028] The condiment beam is clamped and installed on the side of each group of the lifting beam frames close to the partition substrate, and the condiment beam is composed of two horizontally arranged plates and one vertically arranged plate spliced together;

[0029] Three abutting columns are in a group and are slidably installed on the horizontal section of the condiment beam through telescopic springs;

[0030] The ear seats are symmetrically arranged at the top end of the end face of each T-shaped base on the side away from the partition substrate;

[0031] The storage compartment is movably installed between each group of the ear seats through bolts, and its cross-section is convex; the limiting port is opened at the middle position of the bottom wall of the storage compartment close to the partition substrate end;

[0032] The gasket is fixedly installed at the middle position of the top surface of each storage compartment, and cooperates with the U-shaped magnet, and is made of rubber at the same time;

[0033] Four suckers are in a group and are distributed in a rectangular shape on the bottom wall of each storage compartment.

[0034] Preferably, the locking unit includes:

[0035] Three vibration damping chain plates are in a group and are symmetrically arranged inside the storage compartment at the end away from the partition substrate;

[0036] The outer cylinder is fixedly installed at the middle position of each group of the vibration damping chain plates;

[0037] The button is movably installed on the inner wall of each outer cylinder;

[0038] The cam is slidably installed inside each outer cylinder and cooperates with the button;

[0039] The stop plate is fixedly installed at the end of each cam away from the button, and the end face of the stop plate away from the button is made of serrated rubber;

[0040] The telescopic spring is fixedly mounted on one end surface of the stop plate close to the button, and one end of the telescopic spring away from the stop plate is fixedly connected to the vibration-stopping chain plate closest to the stop plate in each group of the vibration-stopping chain plates.

[0041] Preferably, the inner wall of the outer cylinder is evenly provided with inner arc plates, a groove is opened in the middle position of the end surface of the inner arc plate close to the axis of the outer cylinder, a primary opening is evenly opened at one end of the inner arc plate close to the stop plate, a secondary opening is evenly opened at one end of the button close to the stop plate, and the cross-sectional shapes of the primary opening and the secondary opening are both V-shaped, the outer wall of the button is evenly provided with blocks matching with the groove, the outer wall of the cam is evenly installed with wedge-shaped chain plates, and the wedge-shaped chain plates match with both the primary opening and the secondary opening.

[0042] Preferably, the adjustment unit comprises:

[0043] The lifting seat is movably arranged inside each storage compartment and is installed by snapping and matching with the limit opening. At the same time, a rectangular recessed area is provided on the bottom wall away from one end of the protective substrate, and scale lines are etched on the outer walls on both sides for easy observation and calculation;

[0044] The measuring plate is movably mounted on one end of each supporting seat away from the insulating base plate, and the measuring plate and the sealing plate are mounted in a close-fitting sliding manner;

[0045] A locking sleeve is fixedly mounted on one end of each measuring plate away from the middle of the shielding base plate;

[0046] A rotating drum, fixedly mounted on the outer wall of each locking sleeve;

[0047] Ratchets, two in a group, and each group is distributed on the inner wall of each of the rotating drums in a mirror image, and are rotatably mounted with the rotating drums;

[0048] The inner sleeve is fixedly mounted on the outer wall of each locking sleeve and is located in the middle of each set of mirror-image ratchets;

[0049] Non-standard pawls, two of which are distributed on each inner sleeve and are slidably arranged on two different end surfaces of the inner sleeve in a centrally symmetrical manner;

[0050] Positioning plates, two in a group, are arranged on both side end faces of the inner sleeve in a group shape, and the number and position correspond one-to-one with the non-standard pawls;

[0051] The telescopic column is symmetrically fixedly installed at one end of each non-standard pawl close to the axis of the locking sleeve, and is installed in a sliding fit with the positioning plate.

[0052] Preferably, each of the measuring plates has matching rails symmetrically distributed on the end face away from the protective base plate, a movable frame is slidably installed between each group of the matching rails, a driven rack is detachably installed on the middle position of each movable frame close to the protective base plate by bolts, a gear meshing with the driven rack is rotatably installed on the middle position of each measuring plate by a mounting seat, a driving rack meshing with the gear is provided in the middle position of each measuring plate, and the driving rack and the driven rack are arranged on both sides of the gear, and the driving rack is fixedly connected to the sliding seat, an air gathering chamber is provided at one end of the bottom wall of the movable frame, a dust reduction cylinder is rotatably installed on the middle position of the end face of the driven rack away from the storage cabin by a mounting seat, and the dust reduction cylinder and the air gathering chamber are disconnectably connected by a hose, filter discs are evenly arranged inside the dust reduction cylinder, and the filter discs are filled with dust-absorbing materials such as activated carbon, an axial moving rod fixedly connected to the filter disc is provided inside the dust reduction cylinder, and the outer wall of the axial moving rod is evenly provided with upward spiral grooves.

[0053] Preferably, a fan blade is fixedly installed on one end of the axial moving rod away from the movable frame, and combing plates are evenly arranged on the bottom wall of the fan blade along its circumference, and soft brushes corresponding to the positions of the combing plates are evenly arranged on the bottom wall of the fan blade through a mounting seat.

[0054] Preferably, a shock-reducing frame is symmetrically arranged at the top of the outer wall of the partition tube, and a telescopic detector is slidably installed between the shock-reducing frame and the partition tube. The telescopic detector is composed of a shaft section and a wedge-shaped plate section, and the wedge-shaped plate section is completely inside the partition tube.

[0055] The present invention has the following beneficial effects:

[0056] 1. The present invention drives the fan blade to rotate through the shaft driving rod, and then the soft brush rotates synchronously under the action of the fan blade. In this process, the dust cleaned by the soft brush is adsorbed into the gas gathering chamber through the dust reduction tube by an external air pump for sedimentation and storage, and the gas flowing into the gas gathering chamber is adsorbed and filtered by the filter and neutralized by the electrode to relieve the sedimentation pressure of the gas gathering chamber. At the same time, the moisture mixed in the gas is also removed, which is beneficial to create a stable and clean measurement environment, avoid the generation of accumulated static electricity, and then eliminate the soft faults caused by it, and also eliminate the root cause of the breakdown of sensitive devices, reduce the probability of failure during the test, and reduce secondary pollution.

[0057] 2. The present invention reduces the vibration effect between the guide rod and the measuring plate through a return spring, thereby initially achieving the relative stability of the partition cylinder at the outer wall of the middle guide rod. That is, through the self-elastic force of the return spring, the vibration of the device is initially adaptively buffered. Similarly, then through the action of the damping spring, the vibration effect of the partition cylinder is further reduced, and at the same time, it gradually adapts to the vibration frequency between the contact surfaces and approaches it within the maximum range. Finally, through the self-elastic force of the telescopic detector, the vibration frequency between it and the terminal is further reduced until the telescopic detector and the terminal remain relatively stationary, which is beneficial to improving the measurement data acquisition of the telescopic detector, improving the detection accuracy to a certain extent, and solving the collision problem between the traditional detection end and the terminal, and improving the service life of electronic devices.

[0058] 3. During the non-detection stage, the present invention protects the adjustment unit and the frequency synchronization unit in the product through the storage compartment, thereby preventing the telescopic detector from being exposed to the external environment for a long time, that is, ensuring its own cleanliness, and at the same time effectively protecting the cleanliness of the soft brush body, avoiding secondary pollution to electronic components and causing unnecessary failures.

[0059] 4. Through the clamping action between the U-shaped magnet and the storage compartment, the present invention fully reduces the space occupancy rate of the product during the non-detection stage, and at the same time protects the important units in the product from external contact. At the same time, through the cooperation between the suction cup and the sound-absorbing plate, the storage compartment that gets rid of the control of the U-shaped magnet can be in another stable operating state, that is, two states of the storage compartment are realized through the U-shaped magnet and the suction cup respectively, which is beneficial to improving the practicability and portability of the product.

[0060] 5. Through the coordinated cooperation between the ratchets and pawls at different positions, the present invention realizes the two-way self-locking control of the rotating cylinder, that is, by rotating the rotating cylinder in different directions, the frequency synchronization unit can be adjusted to different angles for operation, which is beneficial to increasing the detection angle diversity of the frequency synchronization unit in the power distribution cabinet, helping to improve the operation stability of the frequency synchronization unit at multiple angles, breaking the operation limitations and flexibility of traditional detection equipment in special environments, and improving the market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0062] Figure 2 is a schematic diagram of the partial structure of the main unit of the present invention.

[0063] Figure 3 is a schematic diagram of the partial structures of the main unit, the portable unit and the adjustment unit of the present invention.

[0064] Figure 4 is a partial structural plan view of the portable unit of the present invention.

[0065] Figure 5 is a partial enlarged schematic view of the structure at position A in the attached drawing of the present invention. Figure 3 in the attached drawing of the present invention.

[0066] Figure 6 is a partial cross-sectional view of the internal structure of the adjustment unit of the present invention.

[0067] Figure 7 is a partial sectional view of the structure of the locking unit of the present invention.

[0068] Figure 8 is a partial schematic view of the structure of the locking unit of the present invention.

[0069] Fig. 9 is a schematic view of the different state changes of the locking unit of the present invention.

[0070] Fig.10 is a partial schematic view of the structure of the same-frequency unit of the present invention.

[0071] Fig.11 is a general schematic view of the three-dimensional structure of the adjustment unit of the present invention.

[0072] Fig.12 is a front view of the adjustment unit in the attached drawing of the present invention. Fig.11 in the attached drawing of the present invention.

[0073] Reference numerals in the figure: 1, power distribution cabinet; 2, main body unit; 3, portable unit; 4, locking unit; 5, adjustment unit; 6, same-frequency unit;

[0074] 11, locking wall plate; 12, heat conduction fan; 13, overload cabin; 14, drainage pipe; 15, switch component; 16, terminal block; 17, repair bracket;

[0075] 21, partition protection substrate; 22, handle plate; 23, lifting groove; 24, locking bolt; 25, lifting platform plate; 26, guide groove; 27, T-shaped base; 28, C-shaped magnet;

[0076] 31, lifting beam frame; 32, sound absorption board; 33, condiment beam; 34, abutting column; 35, ear seat; 36, storage cabin; 37, gasket; 38, suction cup;

[0077] 41, vibration damping chain plate; 42, outer cylinder; 43, button; 44, cam; 45, stop plate; 46, telescopic spring;

[0078] 421, inner arc plate; 422, card slot; 423, first-level opening;

[0079] 431, second-level opening; 432, clamping block;

[0080] 441, wedge-shaped chain plate;

[0081] 51. Lifting seat; 52. Measuring plate; 53. Locking sleeve; 54. Rotating cylinder; 55. Ratchet; 56. Inner sleeve; 57. Non-standard pawl; 58. Positioning plate; 59. Telescopic column;

[0082] 61. Sliding seat; 62. Key plate; 63. Guide rod; 64. Sealing plate; 65. Return spring; 66. Rubber sleeve column; 67. Ring piece; 68. Partition tube; 69. Shock-absorbing spring;

[0083] 681. shock-reducing frame; 682. telescopic tester;

[0084] 521, coordinate rail; 522, movable frame; 523, driven rack; 524, gear; 525, driving rack; 526, gas collecting chamber; 527, dust suppression cylinder; 528, filter; 529, shaft moving rod;

[0085] 5291. Fan blade; 5292. Combing board; 5293. Soft brush. DETAILED DESCRIPTION

[0086] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0087] It should be noted that the terms “vertical”, “horizontal”, “left”, “right” and similar expressions used in this document are only for the purpose of explanation and do not represent the only implementation method.

[0088] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0089] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 It can be seen that an electric variable measuring device for an electromechanical power distribution cabinet includes a power distribution cabinet 1, which is composed of a box body and a box door. A main unit 2 for detection is detachably provided at the junction of the box body and the box door of the power distribution cabinet 1, and a portable unit 3 is provided at one end of the main unit 2 away from the box door. A locking unit 4 is provided on the portable unit 3, and an adjustment unit 5 is also provided on the portable unit 3. A frequency synchronization unit 6 for improving detection accuracy is provided on the adjustment unit 5;

[0090] Reference Figure 1It can be seen that lock wall plates 11 are symmetrically installed at the top and bottom of the box body. Heat conduction fans 12 are symmetrically installed on both inner walls of the box body. An overload cabin 13 fixedly connected to the box body is arranged at the bottom end of each heat conduction fan 12. A drainage pipe 14 is installed between the overload cabins 13. The bottom end of the drainage pipe 14 penetrates through the outer walls at both bottom ends of the box body. A switch component 15 is arranged inside the box body. A terminal block 16 fixedly connected to the box body is arranged around the switch component 15. A repair bracket 17 with a loop structure is arranged on the outer side of the end face of the box body close to the box cover.

[0091] Auxiliary function display of the power distribution cabinet 1:

[0092] The heat conduction fan 12 is used to assist in dissipating the heat accumulated in the power distribution cabinet 1. At the same time, the overload cabin 13 intercepts the rainwater entering the power distribution cabinet 1 through the heat conduction fan 12, and guides it to the outside through the drainage pipe 14. At the same time, a filtering device is arranged at one end inside the heat conduction fan 12, which can reduce the deposition of external particulate impurities on the surface of the terminal block 16 or the switch component 15 in the power distribution cabinet 1 to a certain extent, and reduce the incidence of discharge faults;

[0093] Through the setting of the lock wall plates 11, the installation convenience of the power distribution cabinet 1 is enhanced, and at the same time, the difficulty of later maintenance of the power distribution cabinet 1 is reduced;

[0094] When starting to perform relevant detections on the terminal block 16 in the power distribution cabinet 1:

[0095] First, open the box door of the power distribution cabinet 1, then place the main unit 2 of this device on the repair bracket 17, and finally, relevant measurement work can be started.

[0096] Refer to Figure 1 and Figure 2 It can be seen that the main unit 2 includes: a partition protection substrate 21, which is slidably installed on one end face of the repair bracket 17 close to the box cover of the power distribution cabinet 1; a handle plate 22, which is fixedly installed at the middle position of the end face of the partition protection substrate 21 close to the box cover; a lifting groove 23, which is opened at the middle position of the end face of the partition protection substrate 21 away from the box cover; locking bolts 24, which are symmetrically distributed at both ends of the partition protection substrate 21 and are installed in threaded cooperation with the partition protection substrate 21; a lifting platform plate 25, which is slidably clamped and installed inside the lifting groove 23; a guiding groove 26, which is opened at the middle position of the end face of the lifting platform plate 25 away from the partition protection substrate 21; T-shaped bases 27, which are symmetrically slidably clamped inside the guiding groove 26; U-shaped magnets 28, with a quantity of two, and are symmetrically and fixedly installed at the top position of the end face of the lifting platform plate 25 away from the partition protection substrate 21;

[0097] Refer to Figure 3 and Figure 4It can be seen that the portable unit 3 includes: a handle frame 31 with an L-shaped cross-section, three in a group, evenly installed at the bottom end of the end face of each T-shaped base 27 away from the partition substrate 21; a sound-absorbing plate 32 fixedly installed at the top of each group of the handle frames 31, and the end of the sound-absorbing plate 32 close to the partition substrate 21 is chamfered in an arc shape; a condiment beam 33 snap-fitted and installed on the side of each group of the handle frames 31 close to the partition substrate 21, and the condiment beam 33 is composed of two horizontally arranged plates and one vertically arranged plate spliced together; abutting columns 34, three in a group, slidably installed on the horizontal section of the condiment beam 33 through a telescopic spring 46.

[0098] Ear seats 35 symmetrically arranged at the top of the end face of each T-shaped base 27 away from the partition substrate 21; a storage compartment 36 movably installed between each group of the ear seats 35 through bolts, and its cross-section is convex; a limiting port opened at the middle position of the bottom wall of the storage compartment 36 close to the partition substrate 21; a gasket 37 fixedly installed at the middle position of the top surface of each storage compartment 36, and cooperating with the C-shaped magnet 28, and is made of rubber at the same time; suction cups 38, four in a group, and distributed in a rectangular shape on the bottom wall of each storage compartment 36.

[0099] When starting the measurement:

[0100] First, snap-fit the partition substrate 21 with the repair bracket 17, and then rotate the locking bolt 24 until the locking bolt 24抵触 the end face of the repair bracket 17. At this time, the position of the partition substrate 21 is fixed (adjust the position of the partition substrate 21 according to the position of the terminal block 16 in the power distribution cabinet 1 or other endpoints to be measured in an orderly manner, and finally fix and limit it through the locking bolt 24).

[0101] Then, under the guiding action of the lifting groove 23, the lifting platform plate 25 drives the T-shaped base 27 to reciprocate to a specified position (similarly adjusted according to the position of the terminal block 16 in the power distribution cabinet 1). Specifically, the movement of the lifting platform plate 25 can be controlled by an electric slider, and in the actual application process, the two T-shaped bases 27 in the same group can be synchronously controlled by an externally connected bidirectional lead screw under the limiting action of the guiding groove 26 (at the same time, the T-shaped base 27 can also be driven to move separately by an electric push block, further breaking the movement limitation of the T-shaped base 27), moving towards or away from each other or moving separately (so as to adaptively adjust the separate detection of different position terminal ports).

[0102] When not starting the detection:

[0103] Move the storage compartment 36 towards the lifting platform plate 25 until the gasket 37 is exactly engaged with the U-shaped magnet 28 (and through the gasket 37 made of rubber material, protect the fitting end between the U-shaped magnet 28 and the gasket 37 to avoid excessive rigid contact between the two, and at the same time improve the engagement effect between the two), while reducing the actual space occupancy of this product;

[0104] Finally, through the handle plate 22, it is convenient for the operator to transfer and carry this product;

[0105] When starting to measure the terminal port in the power distribution cabinet 1:

[0106] Move the storage compartment 36 in the opposite direction to disengage the gasket 37 from the adsorption engagement of the U-shaped magnet 28 until the suction cup 38 contacts and presses against the sound-absorbing plate 32. And during this process, through the freely telescopic abutting column 34, provide anti-collision buffering for the rotating storage compartment 36 (to avoid excessive rotation of the storage compartment 36 and direct rigid collision with the sound-absorbing plate 32, causing unnecessary losses), and at the same time, through the material beam, provide strong guiding support for the stable operation of the abutting column 34.

[0107] Refer to Figure 2 Figure 7 As can be seen, the locking unit 4 includes: vibration damping chain plates 41, three in a group, and symmetrically arranged inside one end of the storage compartment 36 away from the partition substrate 21; outer cylinders 42, fixedly installed at the middle position of each group of vibration damping chain plates 41; buttons 43, movably installed on the inner wall of each outer cylinder 42; cams 44, slidably installed inside each outer cylinder 42 and cooperating with the buttons 43; stop plates 45, fixedly installed at one end of each cam 44 away from the button 43, and the end face of the stop plate 45 away from the button 43 is made of serrated rubber material; telescopic springs 46, fixedly installed on the end face of the stop plate 45 close to the button 43, and the end of the telescopic spring 46 away from the stop plate 45 is fixedly connected to the vibration damping chain plate 41 closest to the stop plate 45 in each group of vibration damping chain plates 41;

[0108] Refer to Figure 7 and Figure 8 As can be seen, the inner wall of the outer cylinder 42 is evenly provided with inner arc plates 421. A card slot 422 is opened at the middle position of the end face of the inner arc plate 421 close to the axis of the outer cylinder 42. A first-level opening 423 is evenly opened at one end of the inner arc plate 421 close to the stop plate 45. A second-level opening 431 is evenly opened at one end of the button 43 close to the stop plate 45. The cross-sectional shapes of the first-level opening 423 and the second-level opening 431 are both V-shaped. The outer wall of the button 43 is evenly provided with card blocks 432 that cooperate with the card slots 422. The outer wall of the cam 44 is evenly installed with wedge-shaped chain plates 441, and the wedge-shaped chain plates 441 cooperate with both the first-level opening 423 and the second-level opening 431;

[0109] Reference Figure 3 , Figure 5 , Fig.11 and Fig.12 It can be seen that the adjustment unit 5 includes: a lifting seat 51, which is movably arranged inside each storage compartment 36 and is installed in a snap-fitting manner with the limit opening, and at the same time, a rectangular recessed area is provided on the bottom wall at one end away from the isolation base plate 21, and scale lines are etched on the outer walls on both sides for easy observation and calculation; a measuring plate 52, which is movably installed at one end of each lifting seat 51 away from the isolation base plate 21, and the measuring plate 52 and the sealing plate 64 are installed in a close-fitting sliding manner; a locking sleeve 53, which is fixedly installed at one end of each measuring plate 52 away from the middle position of the isolation base plate 21; a rotating cylinder 54, which is fixedly installed on the outer wall of each locking sleeve 53; ratchet wheels 55, which are two in a group, and each group is distributed in a mirror image on the inner wall of each of the rotating cylinders 54, and are installed in a rotating manner with the rotating cylinders 54;

[0110] The inner sleeve 56 is fixedly mounted on the outer wall of each locking sleeve 53 and is located in the middle position of each group of mirror-arranged ratchet wheels 55; there are two non-standard pawls 57 distributed on each inner sleeve 56, and they are slidably arranged on two different end surfaces of the inner sleeve 56 in a centrally symmetrical manner; the positioning plates 58 are grouped in two and are arranged in groups on the end surfaces of both sides of the inner sleeve 56, and the number and position correspond one-to-one to the non-standard pawls 57; the telescopic columns 59 are symmetrically fixedly mounted on one end of each non-standard pawl 57 close to the axis of the locking sleeve 53, and are slidably fitted with the positioning plates 58.

[0111] When the suction cup 38 and the sound absorbing plate 32 are in contact with each other:

[0112] According to the distance between the terminal port in the power distribution cabinet 1 and the storage compartment 36, the lifting seat 51 is pulled away from the storage compartment 36 to a specified position;

[0113] In addition, during the movement, the lifting seat 51 drives the measuring plate 52 to move to the designated position area very stably through the engagement with the limit opening and the guiding effect of the inner wall of the storage chamber 36, and the lifting seat 51 gradually blocks the communication channel between the suction cup 38 and the storage chamber 36 during the movement, thereby completely sealing the contact position between the suction cup 38 and the sound absorbing plate 32 (after the pressure changes suddenly, the suction cup 38 firmly fixes the storage chamber 36 at the designated position, and similarly, when the lifting seat 51 returns to the initial position, the aforementioned blocked channel is connected again, and the suction effect of the suction cup 38 on the sound absorbing plate 32 is simultaneously released);

[0114] When the lifting seat 51 is pulled out to the specified position (specifically, the change of the scale line can be observed):

[0115] First, the operator presses the button 43. During the movement of the button 43, the block 432 engages with the slot 422, thereby limiting the moving direction of the button 43. At this time, the wedge-shaped chain plate 441 engaged with the secondary opening 431 is squeezed by the button 43, compressing the telescopic spring 46 and driving the stop plate 45 to move toward one end of the lifting seat 51 until the serrated rubber material contacting one end of the stop plate 45 is squeezed and deformed by the side end surface of the lifting seat 51.

[0116] Then, the button 43 is released. At this time, the cam 44 drives the wedge-shaped chain plate 441 to move toward the outer tube 42 under the reset action of the telescopic spring 46. During the movement, the wedge-shaped chain plate 441 gradually enters the primary opening 423 and deflects at a certain angle under the guidance of the primary opening 423. At this time, the secondary opening 431 on the button 43 is no longer engaged by the wedge-shaped chain plate 441 (for details, please refer to Fig. 9 ), gradually returning to the initial position (the position of the primary opening 423 is closer to the stop plate 45 than the position of the secondary opening 431), so at this time, the stop plate 45 is limited by the position of the primary opening 423, and its rubber end still conflicts with the lifting seat 51 (the deformable serrated rubber material not only enhances the friction between the stop plate 45 and the lifting seat 51, but also reserves a certain amount of moving space);

[0117] Finally, after the button 43 is pressed again, the wedge-shaped chain plate 441 re-enters the secondary opening 431, and deflects at a certain angle under the guidance of the secondary opening 431, and re-enters the outer cylinder 42 with the button 43 when the button 43 is pushed out. At this time, the stop plate 45 releases the position restriction of the lifting seat 51, that is, a self-locking effect is achieved, which is convenient for operators to control, and is a purely mechanical method, free from dependence on electricity, and convenient and simple to maintain;

[0118] After the lifting seat 51 is extended outward from the storage compartment 36:

[0119] The adjusting unit 5 initially located in the concave area at the bottom of the lifting seat 51 is controlled by rotating the rotating drum 54 to rotate outward to a specified position:

[0120] When implementing (taking clockwise as an example):

[0121] The rotating drum 54 is rotated, and the two ratchets 55 in the same group rotate synchronously with the rotating drum 54. At this time, the non-standard pawl 57 on one side is engaged with one of the ratchets 55, and the non-standard pawl 57 on the other side is not engaged with the other ratchet 55 during the rotation process (and at this time, the non-standard pawl 57, under the action of the ratchet 55, does not have a limit block with the ratchet 55 through the telescopic property of the telescopic column 59, but moves toward the axial direction of the locking sleeve 53 under the guidance of the positioning plate 58);

[0122] When rotating in the opposite direction, the matching relationship between the non-standard pawls 57 and the ratchet 55 on both sides is swapped, thereby realizing the self-locking structure of the pawls of the bidirectional ratchet 55, thereby improving the stability of the adjustment unit 5 after adjusting the same frequency unit 6, breaking the operating limitations and flexibility of traditional detection equipment in special environments.

[0123] Reference Figure 5 and Fig.10 It can be seen that the frequency-synchronizing unit 6 includes: two sliding seats 61, which are symmetrically arranged on the adjustment unit 5; a key plate 62, which is fixedly installed at the bottom wall of each sliding seat 61; three guide rods 63 are grouped together and evenly installed at the middle position of the bottom end of each key plate 62; a sealing plate 64, which is fixedly installed at the middle position of the outer wall of each group of guide rods 63 in a through-type manner; a reset spring 65, which is sleeved on the outer wall of each guide rod 63 and is located at the top of the sealing plate 64 and is fixedly connected to the sealing plate 64; a rubber sleeve column 66, which is fixedly installed at the bottom ends of two guide rods 63 in each group of guide rods 63 away from the middle position of the sealing plate 64; a ring plate 67, which is fixedly installed on the outer wall of the bottom end of the guide rod 63 in the middle position of each group of guide rods 63; a partition tube 68, which is slidably installed at the bottom end of the guide rod 63 at the same position as the ring plate 67; a shock-absorbing spring 69, which is fixedly installed at the middle position of the top surface of the partition tube 68 and is movably installed with the outer wall of the guide rod 63;

[0124] Reference Fig.10 It can be seen that a shock-reducing frame 681 is symmetrically arranged at the top of the outer wall of the partition tube 68, and a telescopic detection meter 682 is slidably installed between the shock-reducing frame 681 and the partition tube 68. The telescopic detection meter 682 is composed of a shaft section and a wedge plate section, and the wedge plate section is completely inside the partition tube 68.

[0125] First, the rubber sleeve column 66 contacts and squeezes the end face of the terminal block 16 to be tested, and the sealing plate 64 drives the guide rod 63 to move away from the rubber sleeve column 66 until the reset spring 65 is compressed (and thereafter the reset spring 65 initially buffers the vibrating electronic device and gradually becomes relatively stable);

[0126] Then the partition tube 68 gradually contacts the terminal block 16 to be detected (while being squeezed to a certain extent). During this process, the shock absorbing spring 69 further coordinates the vibration frequency between the partition tube 68 and the vibration device (the shock absorbing spring 69 and the return spring 65 both perform shock absorbing and frequency coordination in the vertical working direction) until the two tend to be relatively static, thereby reducing the influence of device vibration on the measurement data and improving the measurement accuracy.

[0127] Finally, through the coordination between the shock-reducing frame 681 and the complaint detection meter, the frequency between the telescopic detection meter 682 and the vibration port to be detected is further coordinated in the vertical direction compared to the aforementioned shock-absorbing spring 69, so as to ensure that the telescopic detection meter 682 and the vibration to be detected maintain the same vibration frequency to the greatest extent, thereby achieving relatively static detection, which is conducive to improving the accuracy of the detection data;

[0128] The possibility of the telescopic detector 682 contacting the outside world is completely isolated by the isolation tube 68, so as to avoid the influence of the outside dust, humidity and temperature on the detection result.

[0129] Reference Figure 5 and Figure 6 It can be seen that the end surface of each measuring plate 52 away from the protective substrate 21 is symmetrically distributed with matching rails 521, and a movable frame 522 is slidably installed between each group of matching rails 521. A driven rack 523 is detachably installed at the middle position of each movable frame 522 close to the protective substrate 21 through bolts, and a gear 524 meshing with the driven rack 523 is rotatably installed at the middle position of each measuring plate 52 through a mounting seat, and a driving rack 525 meshing with the gear 524 is provided at the middle position of each measuring plate 52, and the driving rack 525 and the driven rack 523 are arranged on both sides of the gear 524, and the driving rack 525 is fixedly connected to the sliding seat 61.

[0130] An air gathering chamber 526 is provided at one end of the bottom wall of the movable frame 522, and a dust suppression cylinder 527 is rotatably installed at the middle position of the end surface of the driven rack 523 away from the storage compartment 36 through a mounting seat, and the dust suppression cylinder 527 and the air gathering chamber 526 are disconnectably connected through a hose, and filter discs 528 are evenly arranged inside the dust suppression cylinder 527, and the filter discs 528 are filled with activated carbon and other dust-absorbing materials, and an axial movable rod 529 fixedly connected to the filter disc 528 is arranged inside the dust suppression cylinder 527, and the outer wall of the axial movable rod 529 is evenly provided with upward spiral grooves.

[0131] Reference Figure 5 and Figure 6 It can be seen that a fan blade plate 5291 is fixedly installed at one end of the axial movable rod 529 away from the movable frame 522, and combing plates 5292 are evenly arranged on the bottom wall of the fan blade plate 5291 along its circumference, and soft brushes 5293 corresponding to the positions of the combing plates 5292 are evenly arranged on the bottom wall of the fan blade plate 5291 through a mounting seat.

[0132] When the aforementioned rubber sleeve column 66 contacts and squeezes the end surface of the terminal block 16 to be tested:

[0133] The driving rack 525, under the action of the sliding seat 61, prompts the gear 524 to drive the driven gear 524 to move, and at this time, the moving direction of the movable frame 522 is opposite to the moving direction of the guide rod 63, and gradually moves toward the terminal row 16 to be detected, until the dust removal cylinder 527 is facing the port to be detected and contacts its end surface. At this time, the port to be detected is completely inside the dust removal cylinder 527, and then the shaft moving rod 529 is driven to rotate by the external motor, so that the soft brush 5293 of the insulating material continuously cleans the dust deposited inside the port;

[0134] During this process, the dust flying in the dust suppression cylinder 527 is adsorbed and settled in the gas collection chamber 526 through an external air pump (cleaned up after the detection is completed), and the dust is initially precipitated and electronically neutralized (reducing the discharge effect) by activated carbon and other substances in the filter 528 (for later maintenance and replacement), and some moisture can also be adsorbed;

[0135] During the dust cleaning process, the soft brush 5293 always maintains a high degree of cleanliness through interaction with the combing plate 5292, which is conducive to improving the long-term working ability of the soft brush 5293 and preventing dust from remaining on the brush and finally re-depositing inside the terminal port;

[0136] The telescopic detector 682 starts the closed detection of the terminal port only after the soft brush 5293 operates;

[0137] It is hereby noted that in the non-detection stage, the adjustment unit 5 and the frequency-synchronizing unit 6 in this product are completely stored in a closed manner through the storage cabin 36 to avoid the interaction between the soft brush 5293 and the telescopic detection meter 682 and the outside world.

[0138] The working principle of an electric variable measuring device for an electromechanical distribution cabinet 1 provided by the present invention is as follows: Step 1: firstly, the main unit 2 is determined at a specified position by means of a protective substrate 21, and then the T-shaped base 27 is moved to the specified position by means of the lifting and lowering adjustment of the lifting platform 25;

[0139] Step 2: Then, by pressing the button 43, the stop plate 45 is controlled to limit the position of the lifting seat 51 extending out of the storage compartment 36 area. At the same time, the ratchet 55 at different positions and the non-standard pawl 57 are engaged to achieve multi-angle stable adjustment of the same frequency unit 6;

[0140] Step 3: Finally, through the cooperation among the driving rack 525, the gear 524 and the driven rack 523, the dust suppression cylinder 527 is moved to the specified position, and the dust inside the port is cleaned by the soft brush 5293. Then, through the dual coordination of the reset spring 65 and the shock-absorbing spring 69, the telescopic detection meter 682 maintains the same frequency vibration detection as the vibrating device to be detected to the greatest extent.

[0141] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0142] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric variable measuring device for an electromechanical power distribution cabinet, comprising a power distribution cabinet (1), wherein the power distribution cabinet (1) is composed of a cabinet body and a cabinet door, and is characterized in that: At the junction of the box body and the box door of the distribution cabinet (1), a main unit (2) for detection is detachably arranged. At one end of the main unit (2) away from the box door, a portable unit (3) is arranged. A locking unit (4) is arranged on the portable unit (3), and an adjusting unit (5) is also arranged on the portable unit (3). A frequency synchronization unit (6) for improving the detection accuracy is arranged on the adjusting unit (5). The frequency synchronization unit (6) includes: Sliding seats (61), two in number, symmetrically arranged on the adjusting unit (5); Key plates (62), fixedly installed at the bottom wall positions of each sliding seat (61); Guide rods (63), three in a group, evenly installed at the middle position of the bottom end of each key plate (62); Sealing plates (64), fixedly installed in a penetrating manner at the middle position of the outer wall of each group of guide rods (63); Return springs (65), sleeved on the outer wall of each guide rod (63), located at the top of the sealing plate (64), and fixedly connected to the sealing plate (64) at the same time; Rubber sleeve columns (66), fixedly installed at the bottom ends of the two guide rods (63) in each group of guide rods (63) away from the middle position of the sealing plate (64); Ring plates (67), fixedly installed on the outer wall of the bottom end of the guide rod (63) located in the middle position of each group of guide rods (63); Partition cylinders (68), slidably installed at the bottom end of the guide rod (63) at the same position as the ring plate (67); Damping springs (69), fixedly installed at the middle position of the top surface of the partition cylinder (68), and movably fitted with the outer wall of the guide rod (63).

2. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 1, characterized in that: Locking wall plates (11) are symmetrically installed at the top and bottom ends of the box body. Heat conduction fans (12) are symmetrically installed on both inner walls of the box body. An overload cabin (13) fixedly connected to the box body is arranged at the bottom end of each heat conduction fan (12). A drainage pipe (14) is installed between the overload cabins (13), and the bottom end of the drainage pipe (14) penetrates the outer walls at both bottom ends of the box body. A switch component (15) is arranged inside the box body. A terminal block (16) fixedly connected to the box body is arranged around the switch component (15). A repair bracket (17) with a loop structure is arranged on the outer side of the end face of the box body close to the box cover.

3. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 2, characterized in that: The main unit (2) includes: A partition protection substrate (21), slidably installed on the end face of the repair bracket (17) close to the box cover of the distribution cabinet (1); A handle plate (22), fixedly installed at the middle position of the end face of the partition protection substrate (21) close to the box cover; A lifting groove (23) is opened at the middle position of the end face of the partition protection substrate (21) away from the box cover; Locking bolts (24), symmetrically distributed at both ends of the partition protection substrate (21), and threadedly fitted with the partition protection substrate (21); A lifting platform plate (25), slidably clamped inside the lifting groove (23); A guiding groove (26) is opened at the middle position of the end face of the lifting platform plate (25) away from the partition protection substrate (21); T-shaped bases (27), symmetrically and slidably clamped inside the guiding groove (26); C-shaped magnets (28), two in number, and symmetrically fixedly installed at the top end position of the end face of the lifting platform plate (25) away from the partition protection substrate (21).

4. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 3, characterized in that: The portable unit (3) includes: A carrying handle frame (31) with an L-shaped cross-section. Three of them form a group and are evenly installed at the bottom end of the end face of each T-shaped base (27) away from the partition substrate (21). A sound-absorbing board (32) is fixedly installed at the top of each group of the carrying handle frames (31), and the end of the sound-absorbing board (32) close to the partition substrate (21) is chamfered in an arc shape. A condiment beam (33) is snap-fitted and installed on the side of each group of the carrying handle frames (31) close to the partition substrate (21), and the condiment beam (33) is composed of two horizontally arranged plates and one vertically arranged plate spliced together. Three abutting columns (34) form a group and are slidably installed on the horizontal section of the condiment beam (33) through a telescopic spring (46). Ear seats (35) are symmetrically arranged at the top end of the end face of each T-shaped base (27) away from the partition substrate (21). A storage compartment (36) is movably installed between each group of the ear seats (35) by bolts, and its cross-section is convex; a limiting opening is opened at the middle position of the bottom wall of the storage compartment (36) close to the partition substrate (21). A gasket (37) is fixedly installed at the middle position of the top surface of each storage compartment (36), and it cooperates with the C-shaped magnet (28), and is made of rubber at the same time. Four suction cups (38) form a group and are distributed in a rectangular shape on the bottom wall of each storage compartment (36).

5. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 4, characterized in that: The locking unit (4) includes: Three anti-vibration chain plates (41) form a group and are symmetrically arranged inside the end of the storage compartment (36) away from the partition substrate (21). An outer cylinder (42) is fixedly installed at the middle position of each group of the anti-vibration chain plates (41). A button (43) is movably installed on the inner wall of each outer cylinder (42). A cam (44) is slidably installed inside each outer cylinder (42) and cooperates with the button (43). A stop plate (45) is fixedly installed at the end of each cam (44) away from the button (43), and the end face of the stop plate (45) away from the button (43) is made of serrated rubber. A telescopic spring (46) is fixedly installed on the end face of the stop plate (45) close to the button (43), and the end of the telescopic spring (46) away from the stop plate (45) is fixedly connected to the anti-vibration chain plate (41) closest to the stop plate (45) in each group of the anti-vibration chain plates (41).

6. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 5, characterized in that: The inner wall of the outer cylinder (42) is evenly provided with an inner arc plate (421), a groove (422) is provided at the middle position of the end surface of the inner arc plate (421) close to the axis of the outer cylinder (42), a primary opening (423) is evenly provided at one end of the inner arc plate (421) close to the stop plate (45), a secondary opening (431) is evenly provided at one end of the button (43) close to the stop plate (45), and the cross-sectional shapes of the primary opening (423) and the secondary opening (431) are both V-shaped, and the outer wall of the button (43) is evenly provided with a block (432) matched with the groove (422), and the outer wall of the cam (44) is evenly installed with a wedge-shaped chain plate (441), and the wedge-shaped chain plate (441) is matched with both the primary opening (423) and the secondary opening (431).

7. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 4, characterized in that: The regulating unit (5) comprises: A lifting seat (51) is movably arranged inside each storage compartment (36) and is installed by snapping and matching with the limit opening. A rectangular recessed area is provided on the bottom wall at one end away from the protective substrate (21), and scale lines are etched on both sides of the outer wall to facilitate observation and calculation. A measuring plate (52) is movably mounted on one end of each supporting seat (51) away from the protective base plate (21), and the measuring plate (52) and the sealing plate (64) are mounted in a close-fitting sliding manner; A locking sleeve (53) is fixedly mounted on one end of each measuring plate (52) away from the middle position of the protective base plate (21); A rotating cylinder (54) is fixedly mounted on the outer wall of each locking sleeve (53); Ratchet wheels (55), two in a group, and each group is distributed on the inner wall of each rotating cylinder (54) in a mirror image, and are rotatably mounted with the rotating cylinder (54); An inner sleeve (56) is fixedly mounted on the outer wall of each locking sleeve (53) and is located in the middle of each set of mirror-image ratchets (55); Non-standard pawls (57), two of which are distributed on each inner sleeve (56) and are slidably arranged on two different end surfaces of the inner sleeve (56) in a centrally symmetrical manner; Positioning plates (58), two in a group, are arranged in a group shape on both side end surfaces of the inner sleeve (56), and the number and position correspond one-to-one with the non-standard pawls (57); The telescopic column (59) is symmetrically fixedly mounted on one end of each non-standard pawl (57) close to the axis of the locking sleeve (53), and is slidably mounted with the positioning plate (58).

8. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 7, characterized in that: The end surface of each measuring plate (52) away from the protective substrate (21) is symmetrically distributed with a matching rail (521), and a movable frame (522) is slidably installed between each group of matching rails (521). A driven rack (523) is detachably installed by bolts at the middle position of each movable frame (522) close to the protective substrate (21). A gear (524) meshing with the driven rack (523) is rotatably installed at the middle position of each measuring plate (52) through a mounting seat. A driving rack (525) meshing with the gear (524) is arranged at the middle position of each measuring plate (52), and the driving rack (525) and the driven rack (523) are arranged separately on the gear (524). ), and the driving rack (525) is fixedly connected to the sliding seat (61). An air gathering chamber (526) is arranged at one end of the bottom wall of the movable frame (522). A dust suppression cylinder (527) is rotatably mounted at the middle position of the end surface of the driven rack (523) away from the storage cabin (36) through a mounting seat, and the dust suppression cylinder (527) and the air gathering chamber (526) are disconnectably connected through a hose. Filters (528) are evenly arranged inside the dust suppression cylinder (527), and the inside of the filter (528) is filled with dust-absorbing materials such as activated carbon. A shaft movable rod (529) fixedly connected to the filter (528) is arranged inside the dust suppression cylinder (527), and the outer wall of the shaft movable rod (529) is evenly provided with upward spiral grooves.

9. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 8, characterized in that: A fan blade plate (5291) is fixedly installed at one end of the axial movable rod (529) away from the movable frame (522), and combing plates (5292) are evenly arranged on the bottom wall of the fan blade plate (5291) along its circumference. Soft brushes (5293) corresponding to the positions of the combing plates (5292) are evenly arranged on the bottom wall of the fan blade plate (5291) through a mounting seat.

10. The electric variable measuring device for an electromechanical power distribution cabinet according to claim 1, characterized in that: A shock-reducing frame (681) is symmetrically arranged at the top of the outer wall of the partition tube (68), and a telescopic detection meter (682) is slidably installed between the shock-reducing frame (681) and the partition tube (68). The telescopic detection meter (682) is composed of a shaft section and a wedge-shaped plate section, and the wedge-shaped plate section is completely inside the partition tube (68).

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