Switch cabinet with stroke measurement function

Abstract

The invention belongs to the technical field of power switch cabinets, and particularly provides a switch cabinet with a stroke measurement function, which comprises a cabinet body, a handcart, a stroke measurement assembly and an attitude detection assembly, and is characterized in that the stroke measurement assembly comprises a first range finder and a current detector, the first range finder is arranged on the handcart, and the current detector is arranged on the handcart; and the current detector is connected between the moving contact mechanism and the bus. And the handcart is pushed forwards until the current detector is electrified, and the distance S1 measured by the first range finder is recorded. The handcart continues to be pushed until the handcart reaches a preset working position, the distance S2 measured by the first distance meter is recorded, and the difference between the two distances is the contact stroke of the contact. According to the invention, the stroke measurement assembly can measure the contact stroke of the contact, and the attitude detection assembly can detect the position attitude of the moving contact mechanism, so that the problem of poor contact of the contact can be found and processed in time, the frequency and cost of equipment overhaul and maintenance can be reduced, and the operation stability of a power grid can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of trolley type switch cabinets, and in particular relates to a switch cabinet with a stroke measurement function. Background Art

[0002] Switchgear is an electrical device used to open, close, control and protect electrical equipment during power generation, transmission, distribution and energy conversion in the power system. The switchgear mainly consists of a fixed cabinet and a removable component (referred to as a trolley). The cabinet is equipped with a static contact, and the trolley is also equipped with a corresponding plum blossom contact mechanism, which is also called a moving contact mechanism. By moving the trolley, the static contact and the moving contact mechanism can be connected or disconnected, thereby controlling the closing or disconnection of the circuit.

[0003] For a trolley-type switchgear, the size of the contact stroke of the moving contact mechanism and the static contact is an important indicator for judging the contact reliability of the switchgear. If the insertion depth of the moving contact mechanism and the static contact is too shallow, the moving contact mechanism and the static contact will be in virtual contact, thereby causing problems such as overheating defects of the contact mechanism. In severe cases, insulation breakdown and busbar shutdown may even occur, directly endangering the stable operation of the power grid. However, due to the special structure of the switchgear, it is difficult to directly measure the contact stroke of the contact. In order to achieve the measurement of the contact stroke of the moving contact mechanism and the static contact, the method commonly used in the prior art is: apply a layer of vaseline on the moving contact mechanism, then push the trolley into the switchgear and move it to the working position. Thereafter, the trolley is shaken out to the maintenance position, and the condition of the vaseline on the static contact is observed to infer the insertion depth of the moving contact mechanism. This measurement method is cumbersome to operate, has low measurement efficiency, and excessive application of vaseline is likely to contaminate the contacts. Summary of the invention

[0004] The invention provides a switch cabinet with a stroke measurement function, aiming to solve the problem that the method of measuring the contact stroke by applying vaseline in the prior art is cumbersome in operation and low in measurement efficiency.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a switch cabinet with a stroke measurement function is provided, comprising a cabinet body, a trolley, a stroke measurement component and a posture detection component, wherein the cabinet body has an isolation chamber, wherein a static contact is arranged in the isolation chamber, wherein the trolley is movably arranged in the isolation chamber, wherein a moving contact mechanism is arranged on the trolley, and wherein the moving contact mechanism and the static contact are plugged and matched; wherein the stroke measurement component comprises a first distance meter and a current detector, wherein the first distance meter is arranged on the trolley, and a distance detection end faces the travel direction of the trolley, and the current detector is electrically connected to the moving contact mechanism; wherein the posture detection component comprises a second distance meter and a detection drive mechanism, wherein a distance detection end of the second distance meter faces the moving contact mechanism, and the detection drive mechanism is arranged on the trolley, and is used to drive the second distance meter to rotate along a circular path with the moving contact mechanism as the center.

[0006] In a possible implementation, the moving contact mechanism includes an insulating seat, a contact arm and a plum blossom contact, the insulating seat is arranged on the trolley, one end of the contact arm is connected to the insulating seat, and the other end extends along the travel direction of the trolley, the plum blossom contact is arranged at one end of the contact arm away from the insulating seat, the current detector is electrically connected to the plum blossom contact, and the second rangefinder is arranged on the side of the contact arm; the posture detection component also includes a telescopic adjustment mechanism, which is arranged on the trolley and is used to drive the second rangefinder to move along the length direction of the contact arm.

[0007] In a possible implementation, the static contacts and the moving contact mechanisms are provided in multiple corresponding manners, the telescopic adjustment mechanism and the second rangefinder are provided in multiple corresponding manners to the moving contact mechanisms respectively, the detection drive mechanism includes multiple transmission wheels and a detection drive motor, the transmission wheels are coaxially arranged on the outer periphery of the corresponding moving contact mechanisms, the telescopic adjustment mechanism is arranged on the side of the corresponding transmission wheel adjacent to the moving contact mechanism, and the detection drive motor is arranged on the trolley and is transmission-connected to the multiple transmission wheels.

[0008] In a possible implementation, the trolley includes a trolley base, a bottom plate, a movable adjustment mechanism, a support plate, and a lifting mechanism. The bottom of the trolley base is provided with movable wheels, and the upper surface of the trolley base is provided with a movable track along the length direction of the moving contact mechanism. The bottom plate is slidably fitted on the movable track, and the movable adjustment mechanism is used to drive the bottom plate to reciprocate along the movable track. The support plate is arranged above the bottom plate, and the lifting mechanism is arranged on the bottom plate to drive the support plate to move up and down. A mounting frame is provided on the support plate, and the moving contact mechanism, the first rangefinder, the second rangefinder and the detection drive mechanism are respectively arranged on the mounting frame.

[0009] In a possible implementation, the lifting mechanism is a scissors-type lift, and the movable adjustment mechanism includes a screw rod and a handwheel provided at one end of the screw rod, the screw rod is arranged along the length direction of the movable track, and the screw rod is threadedly matched with the base plate.

[0010] In a possible implementation, the switch cabinet with stroke measurement function also includes an alignment detection component, the alignment detection component includes a detection contact, a connecting rod and an alarm unit, the connecting rod is arranged on the mounting frame, and is spaced apart from the moving contact mechanism, the detection contact is arranged at one end of the connecting rod adjacent to the static contact, the detection contact has a plurality of circumferentially distributed power connection plates, and the plurality of power connection plates are enclosed to form a detection space for accommodating the static contact, the alarm unit includes a plurality of indicator lights, the indicator lights and the power connection plates correspond one to one, the detection contact also has a power connection post for abutting the end of the static contact, the power connection post, the indicator light and the corresponding power connection post form a detection circuit, when the power connection plate and the power connection post abut against the static contact at the same time, the corresponding detection circuit forms a passage, and the corresponding indicator light can emit a light signal.

[0011] In a possible implementation, the indicator light is disposed on a side of the mounting frame that faces the opening of the isolation chamber, and a plurality of the indicator lights are distributed in a circle.

[0012] In one possible implementation, the mounting frame is provided with a guide hole along the length direction of the moving contact mechanism, the connecting rod is slidably fitted in the guide hole, and the alignment detection assembly also includes a telescopic drive mechanism, which is arranged on the support plate and is used to drive the connecting rod to move axially along the guide hole.

[0013] In a possible implementation, the switch cabinet with stroke measurement function also includes a pressure relief and explosion-proof component, which includes an explosion-proof ring, a top plate and a pressure relief cover plate. The explosion-proof ring has a pressure relief channel that runs through from top to bottom, and the bottom of the pressure relief channel is connected to the isolation chamber. The top plate cover is arranged on the top of the pressure relief channel, and the side wall of the pressure relief channel is provided with a plurality of pressure relief ports along its circumference. The pressure relief cover plates are provided with a plurality of pressure relief ports in a one-to-one correspondence, and the top end of the pressure relief cover plate is hinged above the pressure relief port. In a natural state, the pressure relief cover plate covers the corresponding pressure relief port.

[0014] In a possible implementation, a receiving groove is provided on the upper surface of the explosion-proof ring surrounding the pressure relief channel, the lower end of the top plate is accommodated in the receiving groove and slidably cooperates with the receiving groove, a sealing ring is connected between the lower end of the top plate and the inner wall of the receiving groove, the sealing ring is made of a flexible breathable material, and in a natural state, the sealing ring is in a folded state and stored in the receiving groove.

[0015] Compared with the prior art, the switch cabinet with travel measurement function provided by the present invention has the following beneficial effects: The switch cabinet with stroke measurement function provided by the present invention includes a cabinet body, a trolley, a stroke measurement component and a posture detection component. The static contact is arranged in the cabinet body, and the moving contact mechanism is arranged on the trolley, and can move with the trolley. The stroke measurement component includes a first distance meter and a current detector. The first distance meter is arranged on the trolley, and the current detector is connected between the moving contact mechanism and the busbar. When current passes through the moving contact mechanism, the current detector can generate a signal to remind the operator to pay attention. When in use, the trolley is pushed in the direction of travel until the connection signal is displayed on the current detector. At this time, the distance S1 measured by the first distance meter is recorded, which represents the position when the moving contact mechanism and the static contact are initially in contact. Then, the trolley is continued to be pushed forward until the trolley reaches the preset working position. At this time, the distance S2 measured by the first distance meter is recorded. The difference between the two distances (S2-S1) is the contact stroke of the moving contact mechanism and the static contact.

[0016] The posture detection assembly in the present invention includes a second rangefinder and a detection drive mechanism. The second rangefinder is arranged on one side of the moving contact mechanism and can rotate around the moving contact mechanism as a circle center under the drive of the detection drive mechanism. During the operation of the switch cabinet, when the moving contact mechanism is offset, the distance measured by the second rangefinder during the rotation will change. The present invention can detect the coaxiality of the moving contact mechanism and the static contact through the posture detection assembly, and indirectly judge whether the contact arm of the moving contact mechanism is offset through the distance measured by the second rangefinder with the moving contact mechanism.

[0017] The stroke measurement component in the present invention can measure the contact stroke of the moving contact mechanism and the static contact, and the posture detection component can detect the position posture of the moving contact during the operation of the switch cabinet, ensuring that the moving contact mechanism and the static contact are in good contact, which helps to ensure that the switch cabinet operates stably in a good state. The stroke measurement component uses the first distance meter and the current detector for detection, which will not interfere with the operation of the moving contact mechanism and the static contact. The intelligent design makes the measurement results more accurate and reliable, and can timely discover and deal with the problem of poor contact between the moving contact mechanism and the static contact, which helps to extend the service life of the equipment, reduce the frequency and cost of equipment overhaul and maintenance, avoid power outage losses caused by equipment failure, and improve the stability of power grid operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a switch cabinet with a travel measurement function provided by one of the embodiments of the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle A part; Figure 3 A working principle diagram of a stroke measurement assembly in one embodiment of the present invention; Figure 4 A partial cross-sectional view of a switch cabinet with a stroke measurement function provided in one embodiment of the present invention; Figure 5 A partial cross-sectional view of a pressure relief and explosion-proof component in one embodiment of the present invention; Figure 6 The structure of the handcart, the stroke measurement component, the posture detection component and the alignment detection component in one embodiment of the present invention is shown in FIG. Figure 1 ; Figure 7 for Figure 6 A partial enlarged view of part B in the middle; Figure 8 The structure of the handcart, the stroke measurement component, the posture detection component and the alignment detection component in one embodiment of the present invention is shown in FIG. Figure 2 ; Fig. 9 The structure of the handcart, the stroke measurement component, the posture detection component and the alignment detection component in one embodiment of the present invention is shown in FIG. Figure 3 ; Fig.10 This is a schematic diagram of the structure of a detection contact in one embodiment of the present invention; Fig.11 It is a schematic diagram of the contact between the moving contact mechanism and the stationary contact when the displacement occurs; Fig.12 A diagram showing the working principle of an alignment detection component provided in one embodiment of the present invention.

[0019] Description of reference numerals: 1. Switch cabinet with travel measurement function; 10. Cabinet; 11. Isolation room; 12. Static contact; 20. Handcart; 21. Car body base; 211. Moving wheel; 22. Bottom plate; 23. Moving adjustment mechanism; 231. Screw rod; 232. Handwheel; 24. Support plate; 241. Mounting frame; 25. Lifting mechanism; 26. Moving contact mechanism; 261. Insulating seat; 262. Contact arm; 263. Plum blossom contact; 30. Travel measurement component; 31. First distance meter; 32. Current detector; 40. Posture detection component; 41. Second distance meter; 42. Detection drive Mechanism; 421, transmission wheel; 422, detection drive motor; 43, telescopic adjustment mechanism; 50, alignment detection component; 51, detection contact; 511, power connection sheet; 512, elastic sheet; 513, power connection column; 52, connecting rod; 53, alarm unit; 531, indicator light; 54, telescopic drive mechanism; 60, pressure relief and explosion-proof component; 61, explosion-proof ring; 611, pressure relief port; 612, receiving groove; 62, top plate; 63, pressure relief cover plate; 64, sealing ring; DETAILED DESCRIPTION In order to make the technical problems, technical solutions and beneficial effects to be solved by 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.

[0020] It should be noted that when an element is referred to as being "fixed to", "fixed" or "fixedly disposed" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" or "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. When an element is referred to as being "set to" or "disposed on" another element, it may be directly on the other element or there may be a central element. "Multiple" refers to two or more quantities. "At least one" refers to one or more quantities. "Several" refers to one or more quantities.

[0021] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0022] Please also read Figures 1 to 12 , the switch cabinet 1 with travel measurement function provided by an embodiment of the present invention is described below.

[0023] See also Figure 1 , Figure 3 , Figure 4 and Figure 6The embodiment of the present invention provides a switch cabinet 1 with a stroke measurement function, comprising a cabinet body 10, a trolley 20, a stroke measurement component 30 and a posture detection component 40. The cabinet body 10 has an isolation chamber 11, and a static contact 12 is arranged in the isolation chamber 11. The trolley 20 is movably arranged in the isolation chamber 11. A moving contact mechanism 26 is arranged on the trolley 20, and the moving contact mechanism 26 and the static contact 12 are plugged together; the stroke measurement component 30 includes a first distance meter 31 and a current detector 32. The first distance meter 31 is arranged on the trolley 20, and the distance detection terminal Towards the moving direction of the trolley 20, the current detector 32 is electrically connected to the moving contact mechanism 26 and the busbar. When the moving contact mechanism 26 and the static contact 12 are turned on, the current detector 32 is energized to send a signal, so that the operator knows that the circuit is turned on; the posture detection component 40 includes a second rangefinder 41 and a detection drive mechanism 42. The distance detection end of the second rangefinder 41 faces the moving contact mechanism 26. The detection drive mechanism 42 is arranged on the trolley 20, and is used to drive the second rangefinder 41 to rotate along a circular path with the moving contact mechanism 26 as the center.

[0024] Compared with the prior art, the switch cabinet 1 with a stroke measurement function provided by the embodiment of the present invention has the following beneficial effects: The switch cabinet 1 with stroke measurement function provided by the embodiment of the present invention includes a cabinet 10, a trolley 20, a stroke measurement component 30 and a posture detection component 40. The static contact 12 is arranged in the isolation chamber 11 of the cabinet 10, and the moving contact mechanism 26 is arranged on the trolley 20 and can move with the trolley 20. The stroke measurement component 30 includes a first distance meter 31 and a current detector 32. The first distance meter 31 is arranged on the trolley 20, and the current detector 32 is connected between the moving contact mechanism 26 and the busbar. When current passes through the moving contact mechanism 26, the current detector 32 can generate a signal to let the operator know that the circuit is turned on. When in use, the trolley 20 is pushed in the closing direction until the current detector 32 displays a connection signal. At this time, the distance S1 measured by the first distance meter 31 is recorded, which represents the position when the moving contact mechanism 26 and the static contact 12 are initially in contact. Then, the trolley 20 is continuously pushed forward until it reaches the preset working position. At this time, the distance S2 measured by the first distance meter 31 is recorded. The difference between the two distances (S2-S1) is the contact stroke of the moving contact mechanism 26 and the stationary contact 12.

[0025] In the embodiment of the present invention, the posture detection component 40 includes a second rangefinder 41 and a detection drive mechanism 42. The second rangefinder 41 is arranged on one side of the moving contact mechanism 26 and can rotate around the moving contact mechanism 26 as the center of a circle under the drive of the detection drive mechanism 42. During the operation of the switch cabinet, when the moving contact mechanism 26 is offset, the distance measured by the second rangefinder 41 during the rotation of the moving contact mechanism 26 will change. In the embodiment of the present invention, the posture detection component 40 can detect the coaxiality of the moving contact mechanism 26 and the static contact 12, and indirectly judge whether the contact arm 262 of the moving contact mechanism 26 is offset by measuring the distance between the second rangefinder 41 and the moving contact mechanism 26.

[0026] In the embodiment of the present invention, the stroke measurement component 30 can measure the contact stroke of the moving contact mechanism 26 and the stationary contact 12, and the posture detection component 40 can detect the position and posture of the moving contact during the operation of the switch cabinet, and judge whether the moving contact mechanism 26 and the stationary contact 12 are in good contact, which helps to ensure that the switch cabinet operates stably in a good state. The stroke measurement component 30 uses the first distance meter 31 and the current detector 32 for detection. The intelligent design makes the measurement result more accurate and reliable, and can timely discover and deal with the problem of poor contact between the moving contact mechanism 26 and the stationary contact 12, which helps to extend the service life of the switch cabinet, reduce the frequency and cost of its overhaul and maintenance, avoid power outage losses caused by equipment failure, and improve the stability of power grid operation.

[0027] In the embodiment of the present invention, the cabinet 10 is the switch cabinet body. The cabinet 10 is usually a square cover member, which is obtained by stamping and welding steel plates, and the surface is sprayed with paint for rust prevention. The cabinet 10 has one or more isolation chambers 11, and components such as switch circuit breakers are arranged inside as needed. The cabinet 10, the trolley 20, the moving contact mechanism 26, the static contact 12, the first rangefinder 31, the second rangefinder 41 and other parts can directly use existing products on the market, and there is no restriction on their specific specifications, models, shapes and structures, etc., as long as they can meet the use requirements.

[0028] The trolley 20 is movably arranged in the isolation chamber 11. During normal use, the trolley 20 is located in the isolation chamber 11 so that the moving contact mechanism 26 and the stationary contact 12 are in contact and matched to realize power supply. When maintenance is required, the maintenance personnel move the trolley 20 out to disconnect the circuit, so that the maintenance personnel can detect and repair other components in the isolation chamber 11.

[0029] The travel measurement assembly 30 includes a first rangefinder 31 and a current detector 32 arranged on the trolley 20. The first rangefinder 31 and the second rangefinder 41 hereinafter may be existing distance detection elements such as laser distance sensors, as long as they can realize the distance measurement function. A switch baffle corresponding to the first rangefinder 31 may be arranged in the isolation chamber 11, and the switch baffle is fixed in the isolation chamber. The first rangefinder 31 is used to measure the distance between the switch baffle and the first rangefinder 31.

[0030] It is understandable that the stroke measurement assembly 30 only works when the trolley 20 is pushed in, and is used to detect the contact stroke of the contact. After the stroke measurement is completed, it can be removed for storage. The first distance meter 31 can be installed and fixed on the trolley by magnetic attraction, bonding, screw fixing, etc.

[0031] The current detector 32 can directly select the existing current detection instruments on the market. A simple current detector 32 can be composed of a 9V DC battery and an integrated chip. A signal light can be set on the current detector 32. When the circuit is in the on state, the signal light lights up; when the circuit is disconnected, the signal light goes out, so that the operator can intuitively know whether the circuit is conductive.

[0032] When the current detector 32 is in use, firstly, the wiring is led out from the moving contact mechanism 26 and inserted into the corresponding port of the current detector 32. Secondly, the busbar and other lines are grounded, and a wire is led out and inserted into the common port of the current detector 32. When in use, firstly, the trolley 20 is slowly pushed into the isolation chamber 11. When the moving contact mechanism 26 and the static contact 12 are in contact, the signal light of the current detector 32 is on, and the value S1 displayed on the distance meter is recorded. Then, the trolley 20 is moved to the working position, and the value S2 displayed on the first distance meter 31 is recorded again. The difference between the values ​​of S2 and S1 is the contact contact stroke, so that the purpose of measuring the contact insertion depth can be achieved.

[0033] The first rangefinder 31 and the second rangefinder 41 can directly use laser rangefinders that meet national standards and are dedicated to engineering projects. They can perform fixed-point positioning through laser scanning, measure distance accurately, and are quick and easy to use.

[0034] The posture detection assembly 40 includes a second rangefinder 41 and a detection drive mechanism 42. The second rangefinder 41 is arranged on one side of the contact arm 262 of the moving contact mechanism 26. The detection drive mechanism 42 may include an annular member such as a ring, which drives the ring to rotate through a motor gear structure, thereby driving the second rangefinder 41 to rotate. Since the detection end of the second rangefinder 41 faces the contact arm 262 of the moving contact mechanism 26, and the center of rotation coincides with the moving contact mechanism 26, when the moving contact mechanism 26 occurs as follows Fig.11When the displacement is as shown, the value detected by the second rangefinder 41 during the rotation will change. The maintenance personnel can infer the displacement direction of the moving contact mechanism 26 by combining the change of the value with the rotation angle of the second rangefinder 41, and can adjust the installation position of the moving contact mechanism 26 in a targeted manner during maintenance, which helps to improve the convenience of maintenance and ensure that the switch cabinet operates in good condition.

[0035] See also Figure 6 , Figure 7 , Figure 8 and Fig. 9 In some possible embodiments, the moving contact mechanism 26 can directly select the existing moving contact assembly, specifically including an insulating seat 261, a contact arm 262 and a plum blossom contact 263. The specific shape structure and installation method of the insulating seat 261, the contact arm 262 and the plum blossom contact 263 are not described in detail. The insulating seat 261 can be made of ceramic material, and the insulating seat 261 is arranged on the trolley 20. One end of the contact arm 262 is connected to the insulating seat 261, and the other end extends along the travel direction of the trolley 20. The plum blossom contact 263 is arranged at one end of the contact arm 262 away from the insulating seat 261. The current detector 32 is electrically connected to the plum blossom contact 263. The second rangefinder 41 is arranged on the side of the contact arm 262, and can detect the distance between itself and the contact arm 262; the posture detection component 40 also includes a telescopic adjustment mechanism 43, which is arranged on the trolley 20 and is used to drive the second rangefinder 41 to move along the length direction of the contact arm 262.

[0036] The telescopic adjustment mechanism 43 of this embodiment is used to drive the second rangefinder 41 to move along the length direction of the contact arm 262. On the one hand, when not working, the telescopic adjustment mechanism 43 contracts, so that the second rangefinder 41 is retracted to a position adjacent to the trolley 20, preventing the second rangefinder 41 from interfering with the normal cooperation of the plum blossom contact 263. On the other hand, the telescopic adjustment mechanism 43 can drive the second rangefinder 41 to detect the degree of deviation of different axial positions of the contact arm 262, which helps to improve the accuracy of the detection result.

[0037] The telescopic adjustment mechanism 43 can be an electric telescopic rod, a telescopic cylinder, etc., arranged along the length direction of the contact arm 262. As needed, a display screen can be arranged on the switch door of the cabinet 10 to control the operation of the telescopic adjustment mechanism 43, the second rangefinder 41, the first rangefinder 31 and other components, and to facilitate viewing of corresponding parameter results.

[0038] See also Figure 6 , Figure 7 , Figure 8 and Fig. 9In some possible embodiments, a plurality of static contacts 12 are arranged horizontally, a plurality of moving contact mechanisms 26 and static contacts 12 are provided one by one, a plurality of telescopic adjustment mechanisms 43 and a second rangefinder 41 are provided corresponding to the moving contact mechanisms 26, respectively, a detection drive mechanism 42 includes a plurality of transmission wheels 421, and a detection drive motor 422, the transmission wheel 421 is coaxially arranged on the outer periphery of the corresponding moving contact mechanism 26, the transmission wheel 421 rotates with the trolley 20, the telescopic adjustment mechanism 43 is arranged on one side of the corresponding transmission wheel 421 adjacent to the moving contact mechanism 26, the detection drive motor 422 is arranged on the trolley 20, and is connected to the plurality of transmission wheels 421 in transmission mode, and a transmission mode such as tooth meshing transmission, belt transmission, and chain transmission can be adopted between the plurality of transmission wheels 421, as long as the transmission requirements can be met.

[0039] See also Figure 6 , Figure 7 , Figure 8 and Fig. 9 In some possible embodiments, the trolley 20 includes a trolley base 21, a bottom plate 22, a movable adjustment mechanism 23, a support plate 24, and a lifting mechanism 25. A movable wheel 211 is provided at the bottom of the trolley base 21. A movable track is provided on the upper surface of the trolley base 21 along the length direction of the moving contact mechanism 26. The bottom plate 22 is slidably matched with the movable track. The movable adjustment mechanism 23 is used to drive the bottom plate 22 to reciprocate along the movable track. The support plate 24 is arranged above the bottom plate 22. The lifting mechanism 25 is arranged on the bottom plate 22 and is used to drive the support plate 24 to move up and down. A mounting frame 241 is provided on the support plate 24. The moving contact mechanism 26, the first rangefinder 31, the second rangefinder 41 and the detection drive mechanism 42 are respectively arranged on the mounting frame 241.

[0040] In this embodiment, a guide track for the trolley 20 to move is provided in the isolation chamber 11. The body base 21 of the trolley 20 can move along the guide track. When the body base 21 moves into place, the body base 21 can be fixed in the isolation chamber 11 by using a locking mechanism. The bottom plate 22 is slidably matched with the body base 21, and the moving adjustment mechanism 23 can drive the bottom plate 22 to move along the body base 21, thereby driving the moving contact mechanism 26 to move forward or backward. The moving adjustment mechanism 23 can be an automatic adjustment mechanism such as an electric telescopic rod, or a manual adjustment mechanism such as a screw slider mechanism. The lifting mechanism 25 can adjust the height of the support plate 24 so that the moving contact mechanism 26 and the static contact 12 are at the same height to ensure accurate matching. The lifting mechanism 25 can be a scissor lift, an electric screw lift, etc.

[0041] See also Figure 6 , Figure 8 and Fig. 9In some possible embodiments, the lifting mechanism 25 is a scissor-type lift, and the moving adjustment mechanism 23 includes a screw rod 231 and a handwheel 232 provided at one end of the screw rod 231. The screw rod 231 is arranged along the length direction of the moving track, and the screw rod 231 is threadedly matched with the base plate 22. When the operator turns the handwheel 232, the base plate 22 can be driven to move through the screw rod 231, thereby controlling the contact stroke of the moving contact mechanism 26 and the static contact 12.

[0042] The matching reliability of the moving contact mechanism 26 and the static contact 12 directly affects the operating reliability of the switch cabinet. Since the static contact 12 is fixedly installed in the isolation chamber 11, the installation position is affected by many related dimensions, and the installation position is extremely difficult to detect. If the position of the static contact 12 deviates from the designed position in the up, down, left, or right direction, the matching reliability of the moving contact mechanism 26 of the circuit breaker and the static contact 12 in the switch cabinet will be affected when closing the circuit.

[0043] During the production or assembly process of the static contact 12 of the switch cabinet, the actual position of the static contact 12 will inevitably deviate from the designed position. Insufficient contact travel or poor centering between the moving contact mechanism 26 and the static contact 12 will directly lead to excessive contact resistance, causing overheating and causing safety accidents. Therefore, it is of great significance to detect the meshing state and centering of the contact mechanism to ensure the stable operation of the switch cabinet. For switch cabinets that need to adjust the position of the static contact 12 to be used normally, it is necessary to move the trolley 20 for multiple opening and closing attempts. Only after multiple tests can the offset direction of the static contact 12 be accurately determined, which seriously affects the adjustment efficiency of the static contact 12.

[0044] In order to detect the centering degree of the stationary contact 12, so as to detect the displacement of the stationary contact 12 in time, please refer to Figures 6 to 12 In some possible embodiments, the switch cabinet 1 with stroke measurement function further includes an alignment detection component 50, which includes a detection contact 51, a connecting rod 52 and an alarm unit 53. The connecting rod 52 is arranged on the mounting frame 241 and is spaced apart from the moving contact mechanism 26. The detection contact 51 is arranged at one end of the connecting rod 52 adjacent to the static contact. The detection contact 51 has a plurality of circumferentially distributed power connection plates 511, and the plurality of power connection plates 511 are surrounded to form a detection space for accommodating the static contact 12. The alarm unit 53 includes a plurality of indicator lights 531, and the indicator lights 531 correspond to the power connection plates 511 one by one. The detection contact 51 also has a power connection post 513 for abutting against the end of the static contact 12. The power connection post 513, the indicator light 531 and the corresponding power connection plate 511 form a detection circuit. When the power connection plate 511 and the power connection post 513 abut against the static contact at the same time, the corresponding detection circuit forms a passage, and the corresponding indicator light 531 can emit a light signal.

[0045] In this embodiment, the alignment detection component 50 includes a detection contact 51, which corresponds to the static contact 12 one by one. The detection contact 51 can be arranged above or below the moving contact mechanism 26. When the static contact 12 needs to be aligned, the detection contact 51 and the static contact 12 are placed at the same height by the lifting mechanism 25, and then the detection contact 51 is moved toward the static contact 12 by the trolley 20 until the power connection column 513 and the power connection piece 511 are in contact with the static contact at the same time, the detection circuit is turned on, and the indicator light 531 is turned on. Since each power connection piece 511 forms a detection circuit with its own indicator light 531, when the static contact 12 and the detection contact 51 are coaxial, all the power connection pieces 511 arranged around it can contact and conduct electricity with the static contact 12, and multiple indicator lights 531 will light up at the same time. When one or some of the power connection pieces 511 cannot contact with the static contact 12 due to the displacement of the static contact 12, the corresponding indicator lights 531 will not light up. By checking the indicator light 531, the operator can know whether the position of the static contact 12 is offset and in which direction it is offset, so as to facilitate subsequent adjustments.

[0046] In order to prevent the static contact 12 from colliding with the precision measuring contact 51 and causing damage when it is offset, a conductive elastic sheet 512 is provided at the end of the power contact 511 that abuts against the static contact 12. When the static contact 12 is offset, the elastic sheet 512 in contact with it is elastically compressed, and will not cause collision damage to the static contact 12.

[0047] See also Fig. 9 In some possible embodiments, the indicator light 531 is disposed on the side of the mounting frame 241 facing the opening of the isolation chamber 11, and the multiple indicator lights 531 are distributed in a circumferential manner corresponding to the conductive sheets, so that the operator can intuitively know whether the static contact 12 is offset and the offset direction, which is convenient for subsequent adjustments. As needed, the indicator light 531 can be a green light, a red light, a yellow light, or other color bulb.

[0048] See also Figure 6 , Figure 7 and Fig. 9 In some possible embodiments, the mounting frame 241 is provided with a guide hole along the length direction of the moving contact mechanism 26, and the connecting rod 52 is slidably fitted in the guide hole. The alignment detection assembly 50 also includes a telescopic drive mechanism 54, which is arranged on the support plate 24 and is used to drive the connecting rod 52 to move axially along the guide hole.

[0049] The telescopic drive mechanism 54 can be a telescopic drive component such as a cylinder or an electric push rod. When not working, the telescopic drive mechanism 54 drives the detection contact 51 to retract to prevent the detection contact 51 from interfering with the cooperation between the moving contact mechanism 26 and the static contact 12.

[0050] During the operation of the switch cabinet, a short circuit or other fault may occur. When a short circuit occurs, a strong current will be instantly generated. Under the action of the strong current, the air in the cabinet body 10 will instantly expand under high temperature and high pressure, causing a sharp increase in the pressure inside the cabinet body 10. If the pressure inside the cabinet body 10 cannot be released, the switch cabinet body 10 will swell or even burst.

[0051] See also Figure 1 , Figure 2 and Figure 5 In order to achieve pressure relief of the switch cabinet and ensure the safety of the equipment during operation, in some possible embodiments, the switch cabinet 1 with stroke measurement function also includes a pressure relief and explosion-proof component 60, and the pressure relief and explosion-proof component 60 includes an explosion-proof ring 61, a top plate 62 and a pressure relief cover plate 63. The explosion-proof ring 61 has a pressure relief channel that runs through the top and bottom, and the bottom of the pressure relief channel is connected to the isolation chamber 11. The top plate 62 is covered on the top of the pressure relief channel. The side wall of the pressure relief channel is provided with a plurality of pressure relief ports 611 along its own circumference. The pressure relief cover plate 63 is provided with a plurality of pressure relief ports 611 corresponding to each other. The top end of the pressure relief cover plate 63 is hinged to the top of the pressure relief port 611. In a natural state, the pressure relief cover plate 63 is covered on the corresponding pressure relief port 611.

[0052] In this embodiment, the explosion-proof ring 61 is an annular component, which is arranged on the top of the cabinet 10 and is made of a metal plate. The explosion-proof ring 61 can guide the high-pressure gas to rush out from the top to reduce the damage of the high-pressure gas to the cabinet 10 and various components inside. A plurality of pressure relief ports 611 are opened on the side of the explosion-proof ring 61, and the pressure relief cover plate 63 is movably covered on the pressure relief port 611, and the high-pressure gas can be discharged through the pressure relief port 611 to achieve pressure relief. The top of the pressure relief cover plate 63 is hinged to the side wall of the explosion-proof ring 61. Under the action of gravity, the pressure relief cover plate 63 can automatically close the pressure relief port 611 to prevent dust from entering.

[0053] See also Figure 1 , Figure 2 and Figure 5 In some possible embodiments, a receiving groove 612 is provided on the upper surface of the explosion-proof ring 61 surrounding the pressure relief channel, the lower end of the top plate 62 is accommodated in the receiving groove 612 and slidably cooperates with the receiving groove 612, and a sealing ring 64 is connected between the lower end of the top plate 62 and the inner wall of the receiving groove 612. The sealing ring 64 is made of a flexible breathable material. In a natural state, the sealing ring 64 is in a folded state and stored in the receiving groove 612.

[0054] When the volume of high-pressure gas generated inside the isolation chamber 11 is too large and cannot be discharged through the pressure relief port 611 in time, it may cause the side panels of the cabinet 10 to swell, and the side panels of the cabinet 10 need to be repaired. In this embodiment, the top plate 62 is movably connected to the top of the explosion-proof ring 61. The top plate 62 serves as another pressure relief path. The gas that cannot be discharged in time will push the top plate 62 upward. The top plate 62 can slide upward along the receiving groove 612. On the one hand, when the top plate 62 slides upward, the volume of the cabinet 10 will increase, so that the gas pressure in the cabinet 10 is reduced. On the other hand, the gas can also be discharged through the air holes on the sealing ring 64 to achieve pressure relief. In order to prevent the top plate 62 from flying out, a sealing ring 64 is connected between the top plate 62 and the explosion-proof ring 61. The sealing ring 64 can be made of materials such as fabric fiber cloth, has a certain connection strength, and can be breathable. After the pressure relief is completed, the maintenance personnel will reset the top plate 62.

[0055] It can be understood that the various parts in the above-mentioned embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the specification of the present invention has recorded various combination embodiments and can support different combination embodiments.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A switch cabinet with travel measurement function, characterized in that: The invention comprises a cabinet (10), a trolley (20), a stroke measurement assembly (30) and a posture detection assembly (40); a static contact (12) is arranged in an isolation chamber (11) of the cabinet (10); a movable contact mechanism (26) pluggable with the static contact (12) is arranged on the trolley (20); the stroke measurement assembly (30) comprises a first distance meter (31) and a current detector (32); the first distance meter (31) is arranged on the trolley (20); the current detector (32) is electrically connected to the movable contact mechanism (26); the posture detection assembly (40) comprises a second distance meter (41) and a detection drive mechanism (42) respectively arranged on the trolley (20); the distance detection end of the second distance meter (41) faces the movable contact mechanism (26); the detection drive mechanism (42) is used to drive the second distance meter (41) to rotate around the movable contact mechanism (26).

2. The switch cabinet with travel measurement function according to claim 1, characterized in that: The movable contact mechanism (26) comprises an insulating seat (261), a contact arm (262) and a plum blossom contact (263); the insulating seat (261) is arranged on the trolley (20); one end of the contact arm (262) is connected to the insulating seat (261), and the other end extends along the travel direction of the trolley (20); the plum blossom contact (263) is arranged at one end of the contact arm (262) away from the insulating seat (261); the current detector (32) is electrically connected to the plum blossom contact (263); the second distance meter (41) is arranged on the side of the contact arm (262); the posture detection component (40) further comprises a telescopic adjustment mechanism (43); the telescopic adjustment mechanism (43) is arranged on the trolley (20) and is used to drive the second distance meter (41) to move along the length direction of the contact arm (262).

3. The switch cabinet with travel measurement function according to claim 2, characterized in that: The stationary contact (12) and the moving contact mechanism (26) are provided in a plurality in a one-to-one correspondence, the telescopic adjustment mechanism (43) and the second rangefinder (41) are provided in a plurality in a one-to-one correspondence with the moving contact mechanism (26), the detection drive mechanism (42) comprises a plurality of transmission wheels (421) and a detection drive motor (422), the transmission wheel (421) being coaxially arranged on the outer periphery of the corresponding moving contact mechanism (26), the telescopic adjustment mechanism (43) being arranged on a side of the corresponding transmission wheel (421) adjacent to the moving contact mechanism (26), and the detection drive motor (422) being arranged on the trolley (20) and being transmission-connected to the plurality of transmission wheels (421).

4. The switch cabinet with travel measurement function according to claim 1, characterized in that: The trolley (20) further comprises a trolley base (21), a bottom plate (22), a movable adjustment mechanism (23), a support plate (24), and a lifting mechanism (25). The bottom of the trolley base (21) is provided with a movable wheel (211). The upper surface of the trolley base (21) is provided with a movable track along the length direction of the movable contact mechanism (26). The bottom plate (22) is slidably matched with the movable track. The movable adjustment mechanism (23) is used to drive the bottom plate (22) to reciprocate along the movable track. The support plate (24) is arranged above the bottom plate (22). The lifting mechanism (25) is arranged on the bottom plate (22) and is used to drive the support plate (24) to move up and down. A mounting frame (241) is provided on the support plate (24). The movable contact mechanism (26), the first distance meter (31), the second distance meter (41) and the detection drive mechanism (42) are respectively arranged on the mounting frame (241).

5. The switch cabinet with travel measurement function according to claim 4, characterized in that: The lifting mechanism (25) is a scissor-type lift, and the movement adjustment mechanism (23) comprises a screw rod (231) and a hand wheel (232) provided at one end of the screw rod (231). The screw rod (231) is provided along the length direction of the moving track, and the screw rod (231) is threadedly matched with the bottom plate (22).

6. The switch cabinet with travel measurement function according to claim 4, characterized in that: The switch cabinet (1) with a stroke measurement function further comprises an alignment detection assembly (50), the alignment detection assembly (50) comprising a detection contact (51), a connecting rod (52) and an alarm unit (53), the connecting rod (52) being arranged on the mounting frame (241) and spaced apart from the moving contact mechanism (26) in an upper and lower direction, the detection contact (51) being arranged at one end of the connecting rod (52) adjacent to the stationary contact (12), the detection contact (51) having a plurality of circumferentially distributed electrical connection plates (511), the plurality of electrical connection plates (511) being enclosed to form a contact for accommodating the stationary contact (12). ), the alarm unit (53) comprising a plurality of indicator lights (531), the indicator lights (531) corresponding one to the power connection sheet (511), the detection contact (51) further comprising a power connection post (513) for abutting against the end of the stationary contact (12), the power connection post (513), the indicator lights (531) and the corresponding power connection sheet (511) forming a detection circuit, and when the power connection sheet (511) and the power connection post (513) abut against the stationary contact (12) at the same time, the corresponding detection circuit forms a passage, and the corresponding indicator light (531) can emit a light signal.

7. The switch cabinet with travel measurement function according to claim 6, characterized in that: The indicator lights (531) are arranged on a side of the mounting frame (241) that is open toward the isolation chamber (11), and a plurality of the indicator lights (531) are distributed in a circular pattern.

8. The switch cabinet with travel measurement function according to claim 6, characterized in that: The mounting frame (241) is provided with a guide hole along the length direction of the moving contact mechanism (26), and the connecting rod (52) is slidably engaged with the guide hole. The alignment detection component (50) further includes a telescopic drive mechanism (54), and the telescopic drive mechanism (54) is arranged on the support plate (24) and is used to drive the connecting rod (52) to move axially along the guide hole.

9. The switch cabinet with travel measurement function according to claim 1, characterized in that: The switch cabinet (1) with stroke measurement function further comprises a pressure relief explosion-proof assembly (60), wherein the pressure relief explosion-proof assembly (60) comprises an explosion-proof ring (61), a top plate (62) and a pressure relief cover plate (63), wherein the explosion-proof ring (61) has a pressure relief channel extending from top to bottom, wherein the bottom of the pressure relief channel is connected to the isolation chamber (11), wherein the top plate (62) is arranged on the top of the pressure relief channel, wherein the side wall of the pressure relief channel is provided with a plurality of pressure relief ports (611) along its circumference, wherein a plurality of pressure relief cover plates (63) are arranged in a one-to-one correspondence with the pressure relief ports (611), wherein the top end of the pressure relief cover plate (63) is hingedly connected to the top of the pressure relief port (611), and wherein in a natural state, the pressure relief cover plate (63) covers the corresponding pressure relief port (611).

10. The switch cabinet with travel measurement function according to claim 9, characterized in that: The upper surface of the explosion-proof ring (61) is provided with a receiving groove (612) surrounding the pressure relief channel; the lower end of the top plate (62) is accommodated in the receiving groove (612) and slidably cooperates with the receiving groove (612); a sealing ring (64) is connected between the lower end of the top plate (62) and the inner wall of the receiving groove (612); the sealing ring (64) is made of a flexible breathable material; in a natural state, the sealing ring (64) is in a folded state and accommodated in the receiving groove (612).

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