A lifting leg type trolley structure for transferring switchgears across steps

Abstract

The utility model relates to a lifting leg type trolley structure for transferring switch electric appliances across steps, belonging to the technical field of power distribution equipment carrying device, including a base trolley, a cross-step trolley, the cross-step trolley is lifted and is connected with the right side of base trolley, and when the lower part of cross-step trolley is lifted upwards relative to the lower part of base trolley, the space between the lower part of cross-step trolley and ground is compensated by container step of electrical container, so that the upper surface of cross-step trolley and the upper surface of base trolley keep consistent horizontal state with each other, a circuit breaker bearing platform, the left end of circuit breaker bearing platform is fixed with the top of base trolley, and the right end is fixed with the top of cross-step trolley. Advantage: it is helpful to guarantee the circuit breaker in the switch cabinet in the electrical container to be taken out from the switch cabinet safely, efficiently and accurately under the premise of not being interfered by container step, and return to the switch cabinet after the maintenance is completed.

Description

Technical Field

[0001] This utility model belongs to the technical field of power distribution equipment transport devices, specifically relating to a lifting leg trolley structure for transporting switchgear across steps. Background Technology

[0002] A typical, but not limiting, example of the switching equipment mentioned above is the circuit breaker. As a core piece of equipment in a power system, the circuit breakers inside a medium-voltage switchgear can weigh 100-500 kg, depending on their voltage level. During maintenance, these circuit breakers need to be moved out of the cabinet. However, due to the compact space inside electrical shipping containers (also known as "power containers"), especially the height difference between the bottom beams and the floor (the sum of the thicknesses of the bottom beams and the floor plate laid on them), which is the aforementioned step, it would be extremely awkward to use a transfer tool that is neither adjustable nor adaptable to this height difference to move the circuit breaker to be maintained out of the switchgear inside the electrical container. Specifically, because transfer tools such as trolleys cannot be seamlessly integrated with the switchgear and are kept at a considerable distance, the circuit breaker removed from the switchgear can only be transferred to the trolley with manual support or even lifting. Therefore, on the one hand, the operation is very strenuous for the workers, and on the other hand, if the circuit breaker falls to the ground by accident, it will cause significant losses.

[0003] The aforementioned electrical containers, also known as containerized substations or prefabricated substations, are essentially mobile, plug-and-play miniature power stations, representing the intelligent, modular, and efficient development direction of the power equipment field. Upon arrival at the site, they can be quickly put into operation after simple connections (such as connecting power lines or output load lines). This is significant for temporary power needs such as construction sites, large events, post-disaster emergency power supply, and rapid capacity expansion. Furthermore, they offer advantages in mobility and reusability; for example, after a project is completed, the entire "substation" can be transported to another location for continued use, achieving resource recycling and maximizing value.

[0004] As mentioned above, in order to ensure efficient and safe protection of circuit breakers in switch cabinets within electrical containers, it is of positive significance to explore technical measures with relatively simple structures that can avoid interference from the aforementioned steps during use and safely and smoothly transfer the circuit breakers from the switch cabinets to the trolley. The technical solution to be introduced below was developed in this context. Utility Model Content

[0005] The objective of this invention is to provide a lifting-leg trolley structure for transferring switchgear across steps, enabling safe, efficient, and accurate removal of circuit breakers awaiting maintenance from switchgear located in the cramped space of electrical containers without interference from steps, and allowing for their return to the switchgear after maintenance. The present invention accomplishes its objective as follows: a lifting leg trolley structure for transferring switchgear across steps, comprising a base trolley, a step-crossing trolley connected to the right side of the base trolley in a lifting manner, wherein when the lower part of the step-crossing trolley rises relative to the lower part of the base trolley, the space between the lower part of the step-crossing trolley and the ground is compensated by the container steps of the electrical container, thereby keeping the upper surface of the step-crossing trolley and the upper surface of the base trolley at the same level; and a circuit breaker carrying platform, the left end of which is fixed to the top of the base trolley, and the right end of which is fixed to the top of the step-crossing trolley.

[0006] In a specific embodiment of this utility model, the basic trolley includes a basic trolley traveling base, a basic trolley longitudinal fixing frame, and a basic trolley longitudinal lifting adjustment frame. The lower part of the basic trolley longitudinal fixing frame is fixed to the basic trolley traveling base, while the upper part extends upward in a longitudinal state. The lower part of the basic trolley longitudinal lifting adjustment frame is plugged and pulled into the upper part of the basic trolley longitudinal fixing frame, while the upper part of the basic trolley longitudinal lifting adjustment frame extends upward in a longitudinal state. The step-crossing trolley includes a step-crossing trolley base and a step-crossing base longitudinal fixing frame. The system includes a frame and a step-crossing trolley guide rail. The step-crossing trolley base is vertically connected to the right side of the longitudinal fixing frame of the base trolley. The lower part of the longitudinal fixing frame of the step-crossing base is fixed to the step-crossing trolley base, while the upper part of the longitudinal fixing frame of the step-crossing base is slidably engaged with the lower part of the step-crossing trolley guide rail. The upper part of the step-crossing trolley guide rail extends upward and remains at the same level as the upper part of the longitudinal lifting adjustment frame of the base trolley. The left end of the circuit breaker bearing platform is fixed to the top of the longitudinal lifting adjustment frame of the base trolley, while the right end is fixed to the top of the step-crossing trolley guide rail.

[0007] In another specific embodiment of this utility model, the basic trolley traveling base includes a front bottom beam, a rear bottom beam, a left bottom beam, and a right bottom beam. The front bottom beam is fixed to the lower front side of the longitudinal fixing frame of the basic trolley. The rear bottom beam is fixed to the lower rear side of the longitudinal fixing frame of the basic trolley and is parallel to the front bottom beam. The left bottom beam is fixed to the lower left side of the longitudinal fixing frame of the basic trolley, and the right bottom beam is fixed to the lower right side of the longitudinal fixing frame of the basic trolley and is parallel to the left bottom beam. A left bottom beam universal wheel is provided at the front and rear ends of the left bottom beam, facing downwards, while a right bottom beam universal wheel is provided at the front end of the right bottom beam. Each of the rear and downward-facing sides is provided with a right bottom beam universal wheel; when the step-crossing trolley base is not crossing onto the container steps of the electrical container, the step-crossing trolley base and the base trolley travel base are on the same horizontal plane; when the step-crossing trolley base is crossing onto the container steps of the electrical container, the step-crossing trolley base together with the longitudinal fixing frame of the step-crossing trolley rises along the step-crossing trolley guide frame and rises to the same degree as the upper surface of the container steps is higher than the ground.

[0008] In another specific embodiment of this utility model, the basic trolley longitudinal fixing frame includes a front left column, a front right column, a rear left column, and a rear right column. The lower end of the front left column is fixedly connected between the left end of the front bottom beam and the front end of the left bottom beam, while the upper end of the front left column extends upward in a longitudinal direction. The lower end of the front right column is fixedly connected between the right end of the front bottom beam and the front end of the right bottom beam, while the upper end of the front right column extends upward in a longitudinal direction. The lower end of the rear left column is fixedly connected between the rear end of the left bottom beam and the left end of the rear bottom beam, while the upper end of the rear left column extends upward in a longitudinal direction. The lower end of the rear right column is fixedly connected between the right end of the rear bottom beam and the rear end of the right bottom beam. Between them, the upper end of the right column extends upward in a longitudinal state. Among them, the wall of the front left column is provided with front left column pin screw holes spaced from top to bottom along the height direction of the front left column. The wall of the front right column is provided with front right column pin screw holes spaced from top to bottom along the height direction of the front right column. The wall of the rear left column is provided with rear left column pin screw holes spaced from top to bottom along the height direction of the rear left column. The wall of the rear right column is provided with rear right column pin screw holes spaced from top to bottom along the height direction of the rear right column. The front left column, front right column, rear left column and rear right column are distributed in a grid shape and the upper end faces are flush.The basic trolley longitudinal lifting adjustment frame includes a front left guide column, a front right guide column, a rear left guide column, a rear right guide column, and a support platform. The lower end of the front left guide column slides in conjunction with the front left upright column, while the upper end extends longitudinally upwards. On the wall of the front left guide column, corresponding to the pin screw holes of the front left upright column, are spaced apart along the height direction of the front left guide column. The lower end of the front right guide column slides in conjunction with the front right upright column, while the upper end extends longitudinally upwards. Extending upwards, the front right guide pillar has pin screw holes spaced apart along its height direction at positions corresponding to the pin screw holes of the front right pillar. The lower end of the rear left guide pillar slides in contact with the rear left pillar, while the upper end extends upwards longitudinally. The rear left guide pillar also has pin screw holes spaced apart along its height direction at positions corresponding to the pin screw holes of the rear left pillar. The rear right guide pillar... Furthermore, rear right guide column pin screw holes are spaced apart along the height direction of the rear right guide column at positions corresponding to the rear right column pin screw holes. The front left, right, rear left, and rear right guide columns are arranged in a grid pattern, and their upper end faces are flush. The four corners of the support platform are respectively fixed to the tops of the front left, right, rear left, and rear right guide columns. A support platform connecting screw is provided at each of the four corners of the support platform. The upper end of the support platform connecting screw is connected to the circuit breaker bearing platform through a screw seat, while the lower part extends to the bottom of the support platform. A screw adjusting nut is threaded onto the support platform connecting screw and located above the support platform. A locking nut is screwed onto the support platform connecting screw and located between the screw seat and the screw adjusting nut. The longitudinal fixing frame of the step-crossing base corresponds to the right side of both the front right column and the rear right column, and the step-crossing trolley guide frame corresponds to the right side of both the front right guide column and the rear right guide column.

[0009] In another specific embodiment of this utility model, a front left guide column locking screw is provided on the front left column and at the position corresponding to the front left column pin screw hole for inserting into the front left guide column pin screw hole to lock the front left guide column; the locking method for locking the front right guide column to the front right column, the locking method for locking the rear left guide column to the rear left column, and the locking method for locking the rear right guide column to the rear right column are all the same as the locking method for locking the front left guide column to the front left column.

[0010] In another specific embodiment of this utility model, the base of the step-crossing trolley includes a front bottom beam, a rear bottom beam, and a bottom crossbeam; the longitudinal fixing frame of the step-crossing base includes a front lifting column and a rear lifting column; the guide frame of the step-crossing trolley includes a front guide beam, a rear guide beam, and a guide beam connecting beam; the rear left end of the front bottom beam is detachably connected to the lower right side of the front right column, while the right end of the front bottom beam is fixedly connected to the lower end of the front lifting column; the front left end of the rear bottom beam is detachably connected to the lower right side of the rear right column, while the right end of the rear bottom beam is fixedly connected to the lower left side of the rear lifting column; the bottom crossbeam is fixed between the lower ends of the front and rear lifting columns facing each other; and a step-crossing trolley universal wheel is provided on the front end and the rear end facing downwards of the bottom crossbeam; the front and rear lifting columns are longitudinally parallel to each other and keep their upper ends flush; the lower end of the front guide beam slides against the front lifting column. The front and rear guide beams are connected by a sliding engagement, with the upper end extending upwards. The lower end of the rear guide beam is slidably engaged with the rear lifting column, while the upper end extends upwards. A guide beam connecting beam connects the upper end faces of the front and rear guide beams. A guide beam connecting beam connecting screw is provided at both the front and rear ends of the guide beam connecting beam. The upper end of the guide beam connecting screw is connected to the circuit breaker bearing platform through a screw mating seat, while the lower end extends below the guide beam connecting beam. A screw adjusting nut is threaded onto the guide beam connecting screw and located above the guide beam connecting beam. A locking nut is provided on the guide beam connecting screw and located between the screw mating seat and the screw adjusting nut. Adjustment screw holes for the front and rear lifting columns are provided at intervals along the height direction of the front and rear lifting columns. Threaded holes for the front and rear guide beams are provided at intervals corresponding to the adjustment screw holes for the front and rear lifting columns.

[0011] In a further specific embodiment of this utility model, a front lifting column pin screw is provided on the front lifting column, and the front lifting column and the front guide beam are locked by the front lifting column pin screw at the position corresponding to the front lifting column gear adjustment screw hole and the front guide beam screw hole. A rear lifting column pin screw is provided on the rear lifting column, and the rear lifting column and the rear guide beam are locked by the rear lifting column pin screw at the position corresponding to the rear lifting column gear adjustment screw hole and the rear guide beam screw hole.

[0012] In a further specific embodiment of this utility model, a front guide rail plate of the circuit breaker carrying platform is fixed above the front edge of the circuit breaker carrying platform along its length, and a rear guide rail plate of the circuit breaker carrying platform is fixed above the rear edge of the circuit breaker carrying platform along its length. The front and rear guide rail plates of the carrying platform are parallel to each other. A handle fixing plate is folded downward at the left end of the circuit breaker carrying platform, and a pair of handles are fixed upward on the left side of the handle fixing plate. A pair of platform limiting feet are fixed on the downward-facing side of the right end of the circuit breaker carrying platform to prevent the circuit breaker carrying platform from protruding into the cabinet cavity of the switchgear. The cross-sectional shape of the front and rear guide rail plates of the carrying platform is L-shaped. The screw seat and the screw mating seat are fixed to the edge of the circuit breaker carrying platform along its length.

[0013] In another specific embodiment of this utility model, a locking rod support plate is folded downward at the right end of the circuit breaker carrying platform; a locking rod clearance groove is formed in the middle of the handle fixing plate along its length; a locking rod is provided below the circuit breaker carrying platform, the left end of which is located on the left side of the handle fixing plate at the position corresponding to the locking rod clearance groove, the middle part is hinged to the downward-facing side of the circuit breaker carrying platform through a locking rod hinge seat, and the right end extends through a groove on the locking rod support plate to the right side of the locking rod support plate and is bent to form a locking hook; a limiting post is fixed on the right side of each platform limiting foot; a pair of blocking protrusions for preventing the circuit breaker from slipping are provided on the upward-facing side of the left end of the circuit breaker carrying platform.

[0014] In yet another specific embodiment of this utility model, a locking rod hook plate is pivotally mounted on the right side of the handle fixing plate, which limits or unlocks the left end of the locking rod.

[0015] Since the technical solution provided by this utility model consists of a base trolley and a step-crossing trolley, and since the step-crossing trolley is connected to the right side of the base trolley in a lifting manner, when the lower part of the step-crossing trolley rises relative to the lower part of the base trolley, the space between the lower part of the step-crossing trolley and the ground is compensated by the container steps of the electrical container, so that the upper surface of the step-crossing trolley and the upper surface of the base trolley remain in the same horizontal state. This avoids the circuit breaker carrying platform from tilting, and helps to ensure the safe, efficient and accurate removal of the circuit breaker that needs to be inspected from the switch cabinet located in the compact electrical container without interference from the container steps, and to return the circuit breaker to the switch cabinet after inspection. Attached Figure Description

[0016] Figure 1 This is a structural diagram of an embodiment of the present utility model; Figure 2 for Figure 1 A schematic diagram showing the rear view; Figure 3 This is a schematic diagram illustrating an application example of this utility model.

[0017] In the diagram: 1. Basic trolley; 11. Basic trolley base; 111. Front bottom beam; 112. Rear bottom beam; 113. Left bottom beam; 1131. Left bottom beam caster wheel; 114. Right bottom beam; 1141. Right bottom beam caster wheel; 12. Longitudinal fixing frame of the basic trolley; 121. Front left column; 1211. Front left column pin screw hole; 1212. Front left guide column locking screw; 122. Front right column; 1221. Front right column pin screw hole; 123. Rear left column; 1231. Rear left column pin screw hole; 124. Rear right column; 1241. Rear right column pin screw hole; 13. Longitudinal lifting adjustment frame of the basic trolley; 131. Front left guide column; 1311. 1. Front left guide column pin screw hole, 132. Front right guide column, 1321. Front right guide column pin screw hole, 133. Rear left guide column, 1331. Rear left guide column pin screw hole, 134. Rear right guide column, 1341. Rear right guide column pin screw hole, 135. Support platform, 1351. Support platform connecting screw, 13511. Screw seat, 13512. Screw adjusting nut, 13513. Locking nut; 2. Step-crossing trolley, 21. Step-crossing trolley base, 211. Bottom front beam, 2111. Bottom front beam left end screw groove, 21111. Bottom front beam left end removal screw, 212. Bottom rear beam, 2121. Bottom rear beam left end screw groove, 21211. Bottom rear beam left end removal screw, 213. 2131. Bottom crossbeam; 22. Staircase trolley casters; 22. Staircase base longitudinal fixing frame; 221. Front lifting column; 2211. Front lifting column position adjustment screw hole; 2212. Front lifting column pin screw; 222. Rear lifting column; 2221. Rear lifting column position adjustment screw hole; 2222. Rear lifting column pin screw; 23. Staircase trolley guide rail; 231. Front guide beam; 2311. Front guide beam screw hole; 232. Rear guide beam; 2321. Rear guide beam screw hole; 233. Guide beam connecting beam; 2331. Guide beam connecting beam connecting screw; 23311. Screw mating seat; 23312. Screw adjusting nut; 23313. Locking nut; 3. Circuit breaker bearing platform; 31. Bearing platform front guide rail plate; 32. 33. Rear guide rail plate of the carrying platform; 33. Handle fixing plate; 331. Handle; 332. Locking rod clearance groove; 333. Locking rod hook plate; 34. Platform limiting foot stop; 341. Limiting post; 35. Locking rod support folding plate; 351. Locking rod through groove; 36. Locking rod; 361. Locking rod hinge seat; 362. Locking hook; 37. Stop protrusion; 4. Electrical container; 41. Container step; 5. Switch cabinet; 6. Circuit breaker; 61. Guide wheel. Detailed Implementation

[0018] In order to better understand the technical essence and beneficial effects of this utility model, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the solution of this utility model. Any formal but not substantive equivalent transformations made based on the concept of this utility model should be considered within the scope of the technical solution of this utility model.

[0019] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on the current position. Figure 1 The location and state of the object are taken as examples, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0020] Please see Figures 1 to 3 A base trolley is shown, and a step-crossing trolley 2 is shown. The step-crossing trolley 2 is connected to the right side of the aforementioned base trolley 1 in a lifting manner. When the lower part of the step-crossing trolley 2 rises relative to the lower part of the base trolley 1, the space between the lower part of the step-crossing trolley 2 and the ground is compensated by the container steps 41 of the electrical container 4, so that the upper surface of the step-crossing trolley 2 and the upper surface of the base trolley 1 remain in a consistent horizontal state. A circuit breaker carrying platform 3 is shown, the left end of which is fixed to the top of the base trolley 1, and the right end is fixed to the top of the step-crossing trolley 2.

[0021] The aforementioned basic trolley 1 includes a basic trolley traveling base 11, a basic trolley longitudinal fixing frame 12, and a basic trolley longitudinal lifting adjustment frame 13. The lower part of the basic trolley longitudinal fixing frame 12 is fixed to the basic trolley traveling base 11, while the upper part extends upward in a longitudinal state. The lower part of the basic trolley longitudinal lifting adjustment frame 13 is plugged and pulled into the upper part of the basic trolley longitudinal fixing frame 12, while the upper part of the basic trolley longitudinal lifting adjustment frame 13 extends upward in a longitudinal state. The aforementioned step-crossing trolley 2 includes a step-crossing trolley base 21, a step-crossing base longitudinal fixing frame 22, and a step-crossing trolley guide. The slide 23 is connected to the right side of the step-crossing trolley base 21 and the longitudinal fixing frame 12 of the base trolley. The lower part of the longitudinal fixing frame 22 of the step-crossing base is fixed to the step-crossing trolley base 21, while the upper part of the longitudinal fixing frame 22 of the step-crossing base is slidably engaged with the lower part of the step-crossing trolley guide slide 23. The upper part of the step-crossing trolley guide slide 23 extends upward and is kept at the same level as the upper part of the aforementioned longitudinal lifting adjustment frame 13 of the base trolley. The left end of the aforementioned circuit breaker bearing platform 3 is fixed to the top of the longitudinal lifting adjustment frame 13 of the base trolley, while the right end is fixed to the top of the step-crossing trolley guide slide 23.

[0022] See you later Figure 1 and Figure 2 And combined Figure 3The aforementioned base trolley traveling base 11 includes a front base beam 111, a rear base beam 112, a left base beam 113, and a right base beam 114. The front base beam 111 is fixed to the lower front side of the aforementioned base trolley longitudinal fixing frame 12. The rear base beam 112 is fixed to the lower rear side of the base trolley longitudinal fixing frame 12 and is parallel to the front base beam 111. The left base beam 113 is fixed to the lower left side of the base trolley longitudinal fixing frame 12. The right base beam 114 is fixed to the lower right side of the base trolley longitudinal fixing frame 12 and is parallel to the left base beam 113. A left base beam universal wheel 1131 is provided at the front and rear ends of the left base beam 113, facing downwards. A left base beam universal wheel 1131 is provided at the front and rear ends of the right base beam 114. Each of the downward-facing sides is provided with a right bottom beam universal wheel 1141, thereby enabling the base trolley 1 to move. When the aforementioned step-crossing trolley 2's step-crossing trolley base 21 is not crossing over onto the container step 41 of the aforementioned electrical container 4, the step-crossing trolley base 21 and the aforementioned base trolley traveling base 11 are on the same horizontal plane. When the step-crossing trolley base 21 is crossing over onto the container step 41 of the aforementioned electrical container 4, the step-crossing trolley base 21, together with the aforementioned step-crossing base longitudinal fixing frame 22, rises along the aforementioned step-crossing trolley guide frame 23, and the degree of rising is the same as the degree to which the upper surface of the container step 41 rises above the ground.

[0023] The aforementioned basic trolley longitudinal fixing frame 12 includes a front left column 121, a front right column 122, a rear left column 123, and a rear right column 124. The lower end of the front left column 121 is fixedly connected between the left end of the aforementioned front bottom beam 111 and the front end of the aforementioned left bottom beam 113, while the upper end of the front left column 121 extends upward in a longitudinal direction. The lower end of the front right column 122 is fixedly connected between the right end of the front bottom beam 111 and the front end of the aforementioned right bottom beam 114, while the upper end of the front right column 122 extends upward in a longitudinal direction. The lower end of the rear left column 123 is fixedly connected between the rear end of the left bottom beam 113 and the left end of the rear bottom beam 112, while the upper end of the rear left column 123 extends upward in a longitudinal direction. The lower end of the rear right column 124 is fixedly connected between the right end of the rear bottom beam 112 and the right bottom beam 114. Between the rear ends of 14, the upper end of the rear right column 124 extends upward in a longitudinal state. Among them, the front left column pin screw holes 1211 are spaced apart on the wall of the front left column 121 and along (i.e., "along" the height direction of the front left column 121) from top to bottom (or "from bottom to top" the same below). The front right column pin screw holes 1221 are spaced apart on the wall of the front right column 122 and along the height direction of the front right column 122. The rear left column pin screw holes 1231 are spaced apart on the wall of the rear left column 123 and along the height direction of the rear left column 123. The rear right column pin screw holes 1241 are spaced apart on the wall of the rear right column 124 and along the height direction of the rear right column 124.

[0024] Depend on Figures 1 to 3As shown, the aforementioned front left column 121, front right column 122, rear left column 123, and rear right column 124 are arranged in a grid pattern and their upper ends are flush. The aforementioned longitudinal lifting adjustment frame 13 of the base trolley includes a front left guide column 131, a front right guide column 132, a rear left guide column 133, a rear right guide column 134, and a support platform 135. The lower end of the front left guide column 131 slides with the aforementioned front left column 121, while the upper end extends upward in a longitudinal state. On the wall of the front left guide column 131, and at positions corresponding to the aforementioned front left column pin screw holes 1211, the front left guide column pin screw holes 1 are spaced apart along the height direction of the front left guide column 131. 311. The lower end of the front right guide column 132 is slidably engaged with the aforementioned front right column 122, while the upper end extends upward in a longitudinal direction. Front right guide column pin screw holes 1321 are provided on the wall of the front right guide column 132 at intervals along the height direction of the front right guide column 132, corresponding to the aforementioned front right column pin screw holes 1221. The lower end of the rear left guide column 133 is slidably engaged with the aforementioned rear left column 123, while the upper end extends upward in a longitudinal direction. Rear left guide column pin screw holes 1331 are provided on the rear left guide column 133 at intervals along the height direction of the rear left guide column 133, corresponding to the aforementioned rear left column pin screw holes 1231. On the rear right guide column 134, and at positions corresponding to the aforementioned rear right column pin screw holes 1241, rear right guide column pin screw holes 1341 are spaced apart along the height direction of the rear right guide column 134. The aforementioned front left guide column 131, front right guide column 132, rear left guide column 133, and rear right guide column 134 are arranged in a grid pattern, and their upper end faces are flush. The four corners of the support platform 135 are respectively fixed to the tops of the front left guide column 131, front right guide column 132, rear left guide column 133, and rear right guide column 134. A support platform connecting screw 1351 is provided at each of the four corners of the support platform 135. The upper end is connected to the aforementioned circuit breaker bearing platform 3 via a screw seat 13511, while the lower part extends to the bottom of the support platform 135. A screw adjusting nut 13512 is threaded on the support platform connecting screw 1351 and located above the support platform 135. A locking nut 13513 is screwed on the support platform connecting screw 1351 and located between the screw seat 13511 and the screw adjusting nut 13512. The aforementioned longitudinal fixing frame 22 of the cross-step base corresponds to the right side of the aforementioned front right column 122 and rear right column 124. The aforementioned cross-step trolley guide frame 23 corresponds to the right side of the aforementioned front right guide column 132 and rear right guide column 134.

[0025] See you later Figures 1 to 3On the aforementioned front left pillar 121, and at the position corresponding to the front left pillar pin screw hole 1211, a front left guide pillar locking screw 1212 is provided for inserting into the aforementioned front left guide pillar pin screw hole 1311 to lock the aforementioned front left guide pillar 131. The locking methods for locking the aforementioned front right guide pillar 132 to the front right pillar 122, the locking methods for locking the rear left guide pillar 133 to the rear left pillar 123, and the locking methods for locking the rear right guide pillar 134 to the rear right pillar 124 are all the same as the locking methods for locking the aforementioned front left guide pillar 131 to the front left pillar 121, and therefore the applicant will not describe them one by one.

[0026] The aforementioned step-crossing trolley 2's step-crossing trolley base 21 includes a bottom front beam 211, a bottom rear beam 212, and a bottom cross beam 213; the aforementioned step-crossing base longitudinal fixing frame 22 includes a front lifting column 221 and a rear lifting column 222; the aforementioned step-crossing trolley guide frame 23 includes a front guide beam 231, a rear guide beam 232, and a guide beam connecting beam 233; the left rear end of the bottom front beam 211 is detachably connected to the lower right side of the aforementioned front right column 122, while the right end of the bottom front beam 211 is fixedly connected to the lower end of the front lifting column 221; the left front end of the bottom rear beam 212 is connected to the lower right side of the aforementioned rear right column 124. The connection is a side-detachable type, with the right end of the bottom rear beam 212 fixedly connected to the lower left side of the rear lifting column 222. The bottom crossbeam 213 is fixed between the lower ends of the front lifting column 221 and the rear lifting column 222 facing each other. A trolley caster 2131 is provided on the front end and the lower end of the bottom crossbeam 213 facing downwards. The front lifting column 221 and the rear lifting column 222 are longitudinally parallel to each other and flush at their upper ends. The lower end of the front guide beam 231 slides with the front lifting column 221, while its upper end extends upwards. The lower end of the rear guide beam 232 slides with the rear lifting column 222, while its upper end extends upwards. Extending upwards, a guide beam connecting beam 233 connects the upper end faces of the front guide beam 231 and the rear guide beam 232. A guide beam connecting beam connecting screw 2331 is provided at both the front and rear ends of the guide beam connecting beam 2333. The upper end of the guide beam connecting beam connecting screw 2331 is connected to the aforementioned circuit breaker bearing platform 3 via a screw mating seat 23311, while the lower end extends below the guide beam connecting beam 233. A screw adjusting nut 23312 is threaded onto the guide beam connecting screw 2331 and located above the guide beam connecting beam 2333. A screw adjusting nut 23312 is also threaded onto the guide beam connecting screw 2331 and located above the screw mating seat 2331. A locking nut 23313 is provided at the position between 311 and the screw adjusting nut 23312; on the aforementioned front lifting column 221 and rear lifting column 222, and along the height direction of the front lifting column 221 and rear lifting column 222, respectively, there are front lifting column gear adjustment screw holes 2211 and rear lifting column gear adjustment screw holes 2221, respectively; on the aforementioned front guide beam 231 and rear guide beam 232, and at the positions corresponding to the front lifting column gear adjustment screw holes 2211 and rear lifting column gear adjustment screw holes 2221, respectively, there are front guide beam screw holes 2311 and rear guide beam screw holes 2321, respectively.

[0027] exist Figure 2The diagram shows a left-end screw groove 2111 on the left end of the front beam 211, and a left-end removal screw 21111 is provided at the position corresponding to this screw groove 2111. Similarly, the diagram shows a left-end screw groove 2121 on the left end of the rear beam 212, and a left-end removal screw 21211 is provided at the position corresponding to this screw groove 2121. When the aforementioned step-crossing trolley 2 is to cross a step, that is, when the step-crossing trolley's caster wheels 2131 are supported by... Figure 3 When the container step 41 is in place, first loosen the left end release screws 21111 and 21211 of the bottom front beam and the bottom rear beam respectively from the lower ends of the front right column 122 and the rear right column 124. Simultaneously, temporarily loosen the aforementioned and subsequently mentioned front lifting column pin screws 2212 and rear lifting column pin screws 2222, thereby raising the step-crossing trolley 2. Specifically, the step-crossing trolley base 21, together with the step-crossing base longitudinal fixing frame 22, rises to the same degree as the distance from the surface of the container step 41 to the ground. When the step-crossing trolley 2 is in the position of... Figure 3 In the state shown, tighten the aforementioned left end removal screw 21111 of the bottom front beam, the left end removal screw 21211 of the bottom rear beam, the front lifting column pin screw 2212, and the rear lifting column pin screw 2222. After the operator pulls the circuit breaker 6, which is to be inspected and has guide wheels 61 at the bottom, out of the cabinet cavity of the switch cabinet 5 and transfers it to the circuit breaker bearing platform 3, the trolley 2 is moved away from the container step 41. Then, the aforementioned detachment screws 21111 at the left end of the bottom front beam, 21211 at the left end of the bottom rear beam, 2212 at the front lifting column pin, and 2222 at the rear lifting column pin are carefully released and removed. At this time, the trolley base 21 and the longitudinal fixing frame 22 of the trolley base naturally descend until the trolley caster 2131 contacts the ground like the left bottom beam caster 1131 and the right bottom beam caster 1141. Next, the operator returns the aforementioned front beam left end removal screw 21111, rear beam left end removal screw 21211, front lifting column pin screw 2212, and rear lifting column pin screw 2222 to their fixed positions. The operator then moves the circuit breaker 6, which needs maintenance, to the maintenance work area using an effect similar to pushing a supermarket trolley. Since the process of returning the circuit breaker 6, after maintenance, to the switch cabinet 5 is the same as described above, the applicant will not elaborate further.

[0028] If the circuit breaker support platform 3 is not level, with the left end higher than the right end or vice versa, firstly, loosen the locking nut 13513 and fine-tune the support platform connecting screw 1351, specifically by slightly turning the screw adjusting nut 13512 clockwise or counterclockwise. Secondly, after adjustment, lock the locking nut 13513. Similarly, firstly, loosen the locking nut 23313 and fine-tune the guide beam connecting screw 2331, specifically by slightly turning the screw adjusting nut 23312 clockwise or counterclockwise. Secondly, after adjustment, lock the locking nut 23313. These operations will ensure the circuit breaker support platform 3 remains fully level.

[0029] Still see Figures 1 to 3 The aforementioned front lifting column 221 is provided with a front lifting column pin screw 2212, which locks the front lifting column 221 and the front guide beam 231 at the positions corresponding to the aforementioned front lifting column gear adjustment screw hole 2211 and the front guide beam screw hole 2311. The aforementioned rear lifting column 222 is provided with a rear lifting column pin screw 2222, which locks the rear lifting column 222 and the rear guide beam 232 at the positions corresponding to the rear lifting column gear adjustment screw hole 2221 and the rear guide beam screw hole 2321.

[0030] See the key points Figure 1 and Figure 2 A front guide rail plate 31 is fixed above the front edge of the circuit breaker support platform 3 along its length, and a rear guide rail plate 32 is fixed above the rear edge of the circuit breaker support platform 3 along its length. The front guide rail plate 31 and the rear guide rail plate 32 are parallel to each other. A handle fixing plate 33 is folded downward at the left end of the circuit breaker support platform 3, and a pair of handles 331 are fixed upward on the left side of the handle fixing plate 33. A pair of platform limiting feet 34 are fixed on the downward-facing side of the right end of the circuit breaker support platform 3 to prevent the circuit breaker support platform 3 from protruding into the cabinet cavity of the switch cabinet 5. The cross-sectional shape of the front guide rail plate 31 and the rear guide rail plate 32 is L-shaped. The screw seat 13511 and the screw mating seat 23311 are fixed to the edge of the circuit breaker support platform 3 along its length.

[0031] A locking rod support plate 35 is folded downward at the right end of the aforementioned circuit breaker carrying platform 3; a locking rod clearance groove 332 is provided in the middle of the aforementioned handle fixing plate 33 along its length; a locking rod 36 is provided below the aforementioned circuit breaker carrying platform 3, the left end of the locking rod 36 is located on the left side of the aforementioned handle fixing plate 33 at the position corresponding to the locking rod clearance groove 332, the middle part is hinged to the downward-facing side of the circuit breaker carrying platform 3 through a locking rod hinge seat 361, and the right end extends through a locking rod through a groove 351 on the locking rod support plate 35 to the right side of the locking rod support plate 35 and is bent to form a locking hook 362; a limiting post 341 is fixed on the right side of the aforementioned platform limiting foot 34; a pair of blocking protrusions 37 for preventing the circuit breaker from slipping are provided on the upward-facing side of the left end of the circuit breaker carrying platform 3.

[0032] Preferably, a locking rod hook plate 333 is pivotally mounted on the right side of the aforementioned handle fixing plate 33, which limits or unlocks the left end of the aforementioned locking rod 36.

[0033] When the circuit breaker 6 is on the circuit breaker carrying platform 3 and in the transfer state, its right end is limited by the aforementioned locking hook 362, while its left end is limited by a pair of stoppers 37, and the locking lever hook plate 333 is attached to the left end of the locking lever 36. During the transfer process, the operator's hand is held by a pair of handles 331.

[0034] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A lifting leg trolley structure for transferring switchgear across steps, characterized in that: Includes a base trolley (1), a step-crossing trolley (2), the step-crossing trolley (2) being connected to the right side of the base trolley (1) in a lifting manner, and when the lower part of the step-crossing trolley (2) rises relative to the lower part of the base trolley (1), the space between the lower part of the step-crossing trolley (2) and the ground is compensated by the container steps (41) of the electrical container (4) so ​​that the upper surface of the step-crossing trolley (2) and the upper surface of the base trolley (1) remain in a consistent horizontal state; a circuit breaker carrying platform (3), the left end of which is fixed to the top of the base trolley (1), and the right end of which is fixed to the top of the step-crossing trolley (2).

2. The lifting leg trolley structure for transferring switchgear across steps according to claim 1, characterized in that: The basic trolley (1) includes a basic trolley traveling base (11), a basic trolley longitudinal fixing frame (12), and a basic trolley longitudinal lifting adjustment frame (13). The lower part of the basic trolley longitudinal fixing frame (12) is fixed to the basic trolley traveling base (11), while the upper part extends upward in a longitudinal state. The lower part of the basic trolley longitudinal lifting adjustment frame (13) is plugged and pulled into the upper part of the basic trolley longitudinal fixing frame (12), while the upper part of the basic trolley longitudinal lifting adjustment frame (13) extends upward in a longitudinal state. The step-crossing trolley (2) includes a step-crossing trolley base (21), a step-crossing base longitudinal fixing frame (22), and a step-crossing trolley guide. The slide (23), the step-crossing trolley base (21) and the right side of the longitudinal fixing frame (12) of the base trolley are lifted and connected. The lower part of the longitudinal fixing frame (22) of the step-crossing base is fixed to the step-crossing trolley base (21), while the upper part of the longitudinal fixing frame (22) of the step-crossing base is slidably connected to the lower part of the step-crossing trolley guide slide (23). The upper part of the step-crossing trolley guide slide (23) extends upward and is kept at the same level as the upper part of the longitudinal lifting adjustment frame (13) of the base trolley. The left end of the circuit breaker bearing platform (3) is fixed to the top of the longitudinal lifting adjustment frame (13) of the base trolley, while the right end is fixed to the top of the step-crossing trolley guide slide (23).

3. The lifting leg trolley structure for transferring switchgear across steps according to claim 2, characterized in that: The basic trolley traveling base (11) includes a front bottom beam (111), a rear bottom beam (112), a left bottom beam (113), and a right bottom beam (114). The front bottom beam (111) is fixed to the lower front side of the longitudinal fixing frame (12) of the basic trolley. The rear bottom beam (112) is fixed to the lower rear side of the longitudinal fixing frame (12) of the basic trolley and is parallel to the front bottom beam (111) front to back. The left bottom beam (113) is fixed to the lower left side of the longitudinal fixing frame (12) of the basic trolley. The right bottom beam (114) is fixed to the lower right side of the longitudinal fixing frame (12) of the basic trolley and is parallel to the left bottom beam (113) left to right. A left bottom beam universal wheel (1131) is provided at the front end and rear end of the left bottom beam (113) on the downward-facing side, while a right bottom beam (114)... A right bottom beam universal wheel (1141) is provided at the front and rear ends of the 114) and on the downward side. When the trolley base (21) of the trolley (2) is not crossing onto the container step (41) of the electrical container (4), the trolley base (21) and the base trolley walking base (11) are on the same horizontal plane. When the trolley base (21) is crossing onto the container step (41) of the electrical container (4), the trolley base (21) together with the longitudinal fixing frame (22) of the trolley base rises along the trolley guide frame (23) and rises to the same degree as the upper surface of the container step (41) is higher than the ground.

4. The lifting leg trolley structure for transferring switchgear across steps according to claim 3, characterized in that: The basic trolley longitudinal fixing frame (12) includes a front left column (121), a front right column (122), a rear left column (123), and a rear right column (124). The lower end of the front left column (121) is fixedly connected between the left end of the front bottom beam (111) and the front end of the left bottom beam (113), while the upper end of the front left column (121) extends upward in a longitudinal state. The lower end of the front right column (122) is fixedly connected to the front bottom beam (113). 1) The right end of the right column (122) is connected to the front end of the right bottom beam (114), and the upper end of the front right column (122) extends upward in a longitudinal state. The lower end of the rear left column (123) is fixedly connected between the rear end of the left bottom beam (113) and the left end of the rear bottom beam (112), and the upper end of the rear left column (123) extends upward in a longitudinal state. The lower end of the rear right column (124) is fixedly connected between the right end of the rear bottom beam (112) and the rear end of the right bottom beam (114), and The upper end of the rear right column (124) extends upward in a longitudinal direction. On the wall of the front left column (121), and along the height direction of the front left column (121), there are front left column pin screw holes (1211) spaced apart from top to bottom. On the wall of the front right column (122), and along the height direction of the front right column (122), there are front right column pin screw holes (1221) spaced apart from top to bottom. On the wall of the rear left column (123), and along the height direction of the front right column (122), there are... The rear left column (123) has rear left column pin screw holes (1231) spaced apart from top to bottom along the height direction of the rear left column (123). The rear right column (124) has rear right column pin screw holes (1241) spaced apart from top to bottom along the height direction of the rear right column (124). The front left column (121), front right column (122), rear left column (123) and rear right column (124) are arranged in a grid pattern and their upper end faces are flush.The basic trolley longitudinal lifting adjustment frame (13) includes a front left guide column (131), a front right guide column (132), a rear left guide column (133), a rear right guide column (134), and a support platform (135). The lower end of the front left guide column (131) is slidably engaged with the front left column (121), while the upper end extends upward in a longitudinal state. On the wall of the front left guide column (131), and at positions corresponding to the pin screw holes (1211) of the front left column, the front left guide column pin screw holes (1311) are spaced apart along the height direction of the front left guide column (131). The lower end of the front right guide column (132) is slidably engaged with the front right column (122), while the upper end extends upward in a longitudinal state. The front right guide column (132) has front right guide column pin screw holes (1321) spaced apart along the height direction of the front right guide column (132) at positions corresponding to the front right column pin screw holes (1221). The lower end of the rear left guide column (133) slides with the rear left column (123), while the upper end extends upward in a longitudinal state. The rear left guide column (133) has rear left guide column pin screw holes (1331) spaced apart along the height direction of the rear left guide column (133) at positions corresponding to the rear left column pin screw holes (1231). The rear right guide column (134) has rear right guide column pin screw holes (1241) spaced apart along the height direction of the rear right column. The rear right guide column pin screw holes (1341) are spaced apart along the height direction of the rear right guide column (134). The front left guide column (131), front right guide column (132), rear left guide column (133), and rear right guide column (134) are arranged in a grid pattern and their upper end faces are flush. The four corners of the support platform (135) are respectively fixed to the top of the front left guide column (131), front right guide column (132), rear left guide column (133), and rear right guide column (134). A support platform connecting screw (1351) is provided at each of the four corners of the support platform (135). The upper end of the support platform connecting screw (1351) is connected to the broken through the screw seat (13511). The road equipment carrying platform (3) is connected, and the lower part extends to the bottom of the support platform (135). A screw adjusting nut (13512) is threaded on the support platform connecting screw (1351) and above the support platform (135). A locking nut (13513) is screwed on the support platform connecting screw (1351) and between the screw seat (13511) and the screw adjusting nut (13512). The longitudinal fixing frame (22) of the cross-step base corresponds to the right side of both the front right column (122) and the rear right column (124). The cross-step trolley guide frame (23) corresponds to the right side of both the front right guide column (132) and the rear right guide column (134).

5. The lifting leg trolley structure for transferring switchgear across steps according to claim 4, characterized in that: A front left guide column locking screw (1212) is provided on the front left column (121) and at the position corresponding to the front left column pin screw hole (1211) for inserting into the front left guide column pin screw hole (1311) to lock the front left guide column (131). The locking methods for locking the front right guide column (132) to the front right column (122), the locking methods for locking the rear left guide column (133) to the rear left column (123), and the locking methods for locking the rear right guide column (134) to the rear right column (124) are the same as the locking methods for locking the front left guide column (131) to the front left column (121).

6. The lifting leg trolley structure for transferring switchgear across steps according to claim 4, characterized in that: The step-crossing trolley (2) has a step-crossing trolley base (21) comprising a bottom front beam (211), a bottom rear beam (212), and a bottom cross beam (213); the step-crossing base longitudinal fixing frame (22) comprises a front lifting column (221) and a rear lifting column (222); the step-crossing trolley guide frame (23) comprises a front guide beam (231), a rear guide beam (232), and a guide beam connecting beam (233); the rear left end of the bottom front beam (211) is detachably connected to the lower right side of the front right column (122), while the right end of the bottom front beam (211) is fixedly connected to the lower end of the front lifting column (221), and the front left end of the bottom rear beam (212) is connected to the rear right column (122). 4) The lower right side of the bottom beam (212) is detachably connected, and the right end of the bottom rear beam (212) is fixedly connected to the lower left side of the rear lifting column (222). The bottom crossbeam (213) is fixed between the lower ends of the front lifting column (221) and the rear lifting column (222) facing each other. A trolley universal wheel (2131) is provided on the front end and the rear end facing downward on the bottom crossbeam (213). The front lifting column (221) and the rear lifting column (222) are parallel to each other longitudinally and keep their upper ends flush. The lower end of the front guide beam (231) is slidably engaged with the front lifting column (221), while the upper end extends upward. The lower end of the rear guide beam (232) is slidably engaged with the rear lifting column (222). The upper end extends upward, and the guide beam connecting beam (233) connects between the upper end faces of the front guide beam (231) and the rear guide beam (232). A guide beam connecting beam connecting screw (2331) is provided at both the front and rear ends of the guide beam connecting beam (233). The upper end of the guide beam connecting beam connecting screw (2331) is connected to the circuit breaker bearing platform (3) via a screw mating seat (23311), while the lower end extends below the guide beam connecting beam (233). A screw adjusting nut (23312) is threaded onto the guide beam connecting beam connecting screw (2331) and located above the guide beam connecting beam (2332). A screw adjusting nut (23312) is threaded onto the guide beam connecting screw (2331) and located above the screw mating seat (23312). A locking nut (23313) is provided at the position between the screw adjusting nut (23312) and the screw; the front lifting column (221) and the rear lifting column (222) are provided with front lifting column gear adjustment screw holes (2211) and rear lifting column gear adjustment screw holes (2221) respectively at intervals along the height direction of the front lifting column (221) and the rear lifting column (222); the front guide beam (231) and the rear guide beam (232) are provided with front guide beam screw holes (2311) and rear guide beam screw holes (2321) respectively at positions corresponding to the front lifting column gear adjustment screw holes (2211) and the rear lifting column gear adjustment screw holes (2221).

7. The lifting leg trolley structure for transferring switchgear across steps according to claim 6, characterized in that: A front lifting column pin screw (2212) is provided on the front lifting column (221). The front lifting column pin screw (2212) locks the front lifting column (221) and the front guide beam (231) at the positions corresponding to the front lifting column gear adjustment screw hole (2211) and the front guide beam screw hole (2311). A rear lifting column pin screw (2222) is provided on the rear lifting column (222). The rear lifting column pin screw (2222) locks the rear lifting column (222) and the rear guide beam (232) at the positions corresponding to the rear lifting column gear adjustment screw hole (2221) and the rear guide beam screw hole (2321).

8. The lifting leg trolley structure for transferring switchgear across steps according to claim 6, characterized in that: A front guide rail plate (31) is fixed above the front edge of the circuit breaker support platform (3) along its length, and a rear guide rail plate (32) is fixed above the rear edge along its length. The front guide rail plate (31) and the rear guide rail plate (32) are parallel to each other. A handle fixing plate (33) is folded downward at the left end of the circuit breaker support platform (3), and a pair of handles are fixed upward on the left side of the handle fixing plate (33). Hand (331); a pair of platform limiting feet (34) are fixed on the right end of the circuit breaker carrying platform (3) facing downward to prevent the circuit breaker carrying platform (3) from protruding into the cabinet cavity of the switch cabinet (5); the cross-sectional shape of the front guide plate (31) and the rear guide plate (32) of the carrying platform is L-shaped; the screw seat (13511) and the screw mating seat (23311) are fixed to the edge of the circuit breaker carrying platform (3) in the length direction.

9. A lifting leg trolley structure for transferring switchgear across steps according to claim 8, characterized in that: A locking rod support plate (35) is folded downward at the right end of the circuit breaker support platform (3); a locking rod clearance groove (332) is provided in the middle of the handle fixing plate (33) along its length; a locking rod (36) is provided below the circuit breaker support platform (3), the left end of the locking rod (36) is located on the left side of the handle fixing plate (33) at the position corresponding to the locking rod clearance groove (332), and the middle is connected by a locking rod hinge seat (361). The circuit breaker bearing platform (3) is hinged to the downward side, and the right end of the locking rod extends through the groove (351) on the locking rod support plate (35) to the right side of the locking rod support plate (35) and is bent to form a locking hook (362); a limiting post (341) is fixed on the right side of the platform limiting foot (34); a pair of blocking protrusions (37) for preventing the circuit breaker from slipping are provided on the upward side of the left end of the circuit breaker bearing platform (3).

10. A lifting leg trolley structure for transferring switchgear across steps according to claim 9, characterized in that: A locking rod hook plate (333) is pivotally mounted on the right side of the handle fixing plate (33), which limits or unlocks the left end of the locking rod (36).

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