Active filter cabinet that can be expanded and assembled

Abstract

The invention discloses an active filter cabinet that can be deployed and retracted for assembly, and relates to the technical field of active filter cabinet equipment. The invention has the advantage that the position of the active filter cabinet after being suspended can be adjusted, so that it is convenient for operators to inspect and repair the cabinet. The key points of the technical solution are as follows: the cabinet comprises a protective cover that is detachably connected to a wall and a cabinet body located in the protective cover, wherein an opening for the cabinet body to be moved out of or into the protective cover is provided at the lower end of the protective cover, a closing plate for closing the opening is slidably connected to the bottom of the protective cover, and a driving member for driving the cabinet body to be moved out of the opening and to open the closing plate is provided in the protective cover.

Description

Technical Field

[0001] The invention relates to the technical field of active filter cabinet equipment, in particular to an active filter cabinet that can be deployed and assembled in a retractable manner. Background Art

[0002] The filter cabinet is also called a filter. Its internal part is a filter circuit composed of capacitors, inductors and resistors. The filter cabinet can effectively filter out the frequency point of a specific frequency in the power line or the frequency other than the frequency point to obtain a power signal of a specific frequency, or eliminate the power signal after a specific frequency. The filter cabinet can be divided into active filter cabinets and passive filter cabinets. The active filter cabinet is a new type of power electronic device used to dynamically suppress harmonics and compensate for reactive power. It can compensate for harmonics of varying size and frequency as well as varying reactive power.

[0003] Active filter cabinets can be installed in cabinet, wall-mounted or drawer-type according to the installation situation. In the wall-mounted installation, the active filter cabinet will be higher than the operator's operating range after hanging due to the special installation location, and most active filter cabinets are installed in fixed locations, which makes it inconvenient for operators to inspect and repair them. Therefore, the applicant has developed a new technical solution in the actual production process to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide an active filter cabinet that can be assembled in an expandable and retractable manner, which has the advantage that the position of the active filter cabinet after being hung can be adjusted, making it convenient for operators to inspect and repair it.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The present invention provides an active filter cabinet that can be deployed and retracted for assembly, comprising a protective cover that is detachably connected to a wall and a cabinet body located in the protective cover, wherein an opening is provided at the lower end of the protective cover for the cabinet body to be moved out of or into the protective cover, a closing plate that closes the opening is slidably connected to the bottom of the protective cover, and a driving member that drives the cabinet body to move out of the opening and open the closing plate is provided in the protective cover.

[0007] By adopting the above technical solution, the protective cover can be installed on the wall to protect the active filter cabinet and play a role in dust and rain protection. When the operator needs to inspect and repair the active filter cabinet, the driving component opens the closing plate and moves the cabinet downward at the same time, so that the cabinet can be moved out of the opening, so that the cabinet can extend out of the protective cover, and the cabinet can be lowered and moved into the operating range of the operator. When the operation is completed, the driving component moves the cabinet into the protective cover, so that the position of the suspended active filter cabinet can be adjusted.

[0008] Preferably, the driving member includes two opposite fixing plates arranged at the lower end of the inner wall of the protective cover, a rotating rod is rotatably connected between the two fixing plates, two fixing plates are respectively extended from the two ends of the rotating rod, and a driving gear is coaxially fixedly connected to the two extended ends, and the outer walls at both ends of the cabinet are provided with a driving rack meshing with the driving gear, and the driving rack is distributed along the height direction of the cabinet, the lower end of the driving rack extends to the lower end surface of the cabinet, and the upper end extends a distance from the upper end of the cabinet, when the cabinet is located outside the protective cover, the driving gear is meshed with the upper end of the driving rack, and the fixing plate on which the driving gear is installed is located on the inner wall of the protective cover facing the wall, the mouth wall of the opening extends from the side of the protective cover away from the wall, and the opposite mouth walls of the opening are provided with long strip guide grooves, and the two ends of the closing plate are respectively provided with guide plates that slide along the guide grooves;

[0009] The outer wall of the protective cover is provided with a motor for driving a rotating rod to rotate. At this time, one end of the rotating rod extends to the outer wall of the protective cover and is coaxially connected to the motor. The rotating rod is provided with a linkage member for driving the closing plate to move.

[0010] Preferably, the linkage member includes a passive gear coaxially fixed on the rotating rod, the passive gear is located on the side of the driving gear away from the fixed plate, the closing plate is provided with a slide groove at a side position below the passive gear, the slide groove is distributed along the moving direction of the closing plate, a driven rack is provided at the bottom of the slide groove, the inner wall of the protective cover is rotatably connected with a driven gear meshing with the driven rack, the driven gear is rotatably connected to the inner wall of the protective cover through a rotating shaft, the outer wall of the rotating shaft is coaxially fixed with a transition gear, the transition gear and the passive gear are connected by an annular chain. One end of the driven rack is fixedly connected to a groove wall of a side of the slide groove away from the wall, and there is a gap between the other end and another groove wall of the slide groove. A slider is slidably connected in the slide groove, and a convex tooth which is the same as a single tooth on the driven rack is provided on the upper end of the slider. Compression springs are respectively provided at both ends of the slider, and one end of the compression spring away from the slider is fixedly connected to the groove wall of the slide groove, and the other end of the compression spring away from the slider is fixedly connected to a side wall of the driven rack. When the driven gear meshes with the convex tooth, a side wall of the guide plate contacts the groove wall of the guide groove.

[0011] When the cabinet moves upwards into the protective cover, a limiting piece is provided on the closing plate to limit the movement of the closing plate.

[0012] Preferably, the limiting member includes a baffle plate arranged on a side of the closing plate facing the wall, the baffle plate extends vertically downward, one side of the baffle plate is in contact with a side of the cabinet body facing away from the wall, a plurality of ball bearings that abut against the outer wall of the cabinet body are embedded in the side of the baffle plate facing the cabinet body, and a movable groove is provided on the mouth wall of the opening for the closing plate to slide into the side close to the wall.

[0013] Preferably, the upper ends of the two driving racks are provided with support rods extending in opposite directions. When the cabinet is located on the outer wall of the protective cover, the support rods are in contact with the bottom of the protective cover, and one end of the support rod away from the driving rack is slidably connected to the inner wall of the protective cover.

[0014] Preferably, the distance between the driving gear and the bottom of the protective cover is the distance that the closing plate moves to open the opening for the cabinet to move out.

[0015] Preferably, when the cabinet is located in the protective cover, an inner wall of the protective cover is provided with a hanging piece for hanging the cabinet.

[0016] Preferably, the hanging member includes a vertical rod arranged on the top of the protective cover, the lower end of the vertical rod is circumferentially provided with a hook that bends and extends upward, the upper outer wall of the cabinet body is provided with a connecting block, the upper end surface of the connecting block is provided with an entry groove for the hook to enter, and the groove wall of the entry groove is provided with two relatively distributed placement grooves, both of the placement grooves are slidably connected with a baffle rod, the bottom of the two placement grooves are provided with an extrusion spring that allows one end of the baffle rod to extend out of the notch of the placement groove, the upper end surface of the baffle rod is set as an upper inclined surface that cooperates with the lower curved surface of the hook, and the lower end surface is set as a lower inclined surface that cooperates with the upper curved surface of the hook, and the vertical rod is provided with a releasing member for releasing the lower inclined surface from the upper curved surface of the hook.

[0017] Preferably, the release member includes a slide cylinder coaxially slidably connected to the outer wall of the vertical rod, the lower end surface of the slide cylinder is set as a lower conical surface cooperating with the upper inclined surface, the outer wall of the slide cylinder is an upper conical surface for sliding one end of the blocking rod, the upper end of the slide cylinder is provided with a blocking cylinder sleeved on the outer wall of the vertical rod, the end of the blocking cylinder away from the slide cylinder is fixedly connected to the inner wall of the protective cover, the lower end surface of the blocking cylinder is provided with a vertical groove for a tension spring to be placed in, the upper end of the tension spring is fixedly connected to the bottom of the vertical groove, and the lower end is fixedly connected to the upper end surface of the slide cylinder, and when the tension spring is in a natural state, the upper end surface of the slide cylinder contacts the lower end surface of the blocking cylinder.

[0018] Preferably, the side walls of the protection cover are each provided with a plurality of heat dissipation holes.

[0019] The beneficial effects of the present invention are as follows: installing the protective cover on the wall can protect the active filter cabinet and play a role in dust and rain protection. When an operator is required to inspect and repair the active filter cabinet, the driving component opens the closing plate and moves the cabinet downward at the same time, so that the cabinet can be moved out of the opening, so that the cabinet can be extended from the protective cover, and the cabinet can be lowered and moved into the operating range of the operator. When the operation is completed, the driving component moves the cabinet into the protective cover, so that the position of the active filter cabinet after suspension can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of an embodiment;

[0022] Figure 2 It is a schematic diagram of the structure of the rotating rod in the embodiment;

[0023] Figure 3 A schematic diagram of the structure of the guide groove in the embodiment;

[0024] Figure 4 This is a schematic diagram of the structure of a compression spring in an embodiment;

[0025] Figure 5 It is a structural schematic diagram for reflecting the connection block of the embodiment.

[0026] Description of reference numerals:

[0027] In the figure: 1, wall; 2, protective cover; 21, cabinet; 22, opening; 221, closing plate; 222, fixing plate; 223, rotating rod; 224, driving gear; 225, driving rack; 226, guide groove; 227, guide plate; 23, passive gear; 231, slide groove; 232, driven rack; 233, driven gear; 234, rotating shaft; 235, transition gear; 236, chain; 24, slider; 241, convex tooth; 2 42. Compression spring; 25. Baffle; 251. Moving slot; 252. Support rod; 26. Vertical rod; 261. Hook; 262. Connecting block; 263. Entering slot; 264. Placement slot; 265. Baffle rod; 266. Extrusion spring; 27. Upper inclined surface; 271. Lower inclined surface; 272. Sliding cylinder; 273. Lower conical surface; 274. Upper conical surface; 275. Baffle cylinder; 276. Vertical slot; 277. Tension spring; 28. Heat dissipation hole. DETAILED DESCRIPTION

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

[0029] An active filter cabinet that can be expanded and assembled, such as Figure 1 and Figure 2 , including a protective cover 2 detachably connected to the wall 1 and a cabinet 21 located in the protective cover 2. At this time, the cabinet 21 can be detachably connected to the wall 1 by bolts. The lower end of the protective cover 2 is provided with an opening 22 for the cabinet 21 to move out of or into the protective cover 2. A closing plate 221 for closing the opening 22 is slidably connected to the bottom of the protective cover 2. A driving member for driving the cabinet 21 to move out of the opening 22 and open the closing plate 221 is provided in the protective cover 2.

[0030] like Figure 1 and Figure 2 , installing the protective cover 2 on the wall 1 can protect the active filter cabinet and play a role in dust and rain protection. When the operator needs to inspect and repair the active filter cabinet, the driving member opens the closing plate 221 and moves the cabinet 21 downward at the same time, so that the cabinet 21 can be moved out of the opening 22, so that the cabinet 21 extends out from the protective cover 2, and the cabinet 21 moves down to the operator's operable range. When the operation is completed, the driving member moves the cabinet 21 into the protective cover 2, so that the position of the suspended active filter cabinet can be adjusted.

[0031] like Figure 1 and Figure 2 The driving member includes two opposite fixing plates 222 arranged at the lower end of the inner wall of the protective cover 2, and a rotating rod 223 is rotatably connected between the two fixing plates 222. The two ends of the rotating rod 223 extend out of the two sides of the fixing plates 222 respectively, and the two extended ends are coaxially fixedly connected with a driving gear 224. The outer walls of both ends of the cabinet 21 are provided with a driving rack 225 meshing with the driving gear 224. At this time, the driving rack 225 is vertically distributed, and the driving rack 225 is distributed along the height direction of the cabinet 21. The lower end of the driving rack 225 extends to the lower end surface of the cabinet 21, that is, it is flush with the lower end surface of the cabinet 21. The upper end of the driving rack 225 extends a distance from the upper end of the cabinet 21. When the cabinet 21 is located outside the protective cover 2, the driving gear 224 meshes with the upper end of the driving rack 225, and the driving gear 224 is installed. The fixing plate 222 is located on the inner wall of the protective cover 2 facing the wall 1. In order to make the cabinet 21 move stably in the protective cover 2, the side wall of the cabinet 21 opposite to the driving gear 224 can be fitted with the inner wall of the protective cover 2 or the inner wall of the protective cover 2 can be provided with a guide rail for the driving rack 225 to slide. The mouth wall of the opening 22 extends out of the side of the protective cover 2 away from the wall 1. The opposite mouth walls of the opening 22 are provided with long strip guide grooves 226, and the two ends of the closing plate 221 are respectively provided with guide plates 227 that slide along the guide grooves 226; at this time, the driving rack 225 is located at the two ends of the side wall of the cabinet 21 away from the wall 1, and is connected to the side wall of the cabinet 21 through a plurality of transverse connecting rods. At this time, one end of the connecting rod is also connected to the side wall of the cabinet 21 through bolts, and the purpose of assembling and connecting the driving rack 225 and the cabinet 21 is achieved.

[0032] like Figure 1 and Figure 2 At this time, the driving rack 225 moves out of the protective cover 2 along with the closing plate 221. Therefore, in order to facilitate the driving rack 225 to move out of the protective cover 2, the closing plate 221 is provided with an extension plate extending vertically upward on the side away from the wall 1. When the closing plate 221 closes the opening 22, the extension plate and the side wall of the protective cover 2 form a side wall of the entire protective cover 2.

[0033] like Figure 1 and Figure 2 A motor (not shown) for driving the rotating rod 223 to rotate is disposed on the outer wall of the protective cover 2. At this time, one end of the rotating rod 223 extends to the outer wall of the protective cover 2 and is coaxially connected to the motor. A linkage member for driving the closing plate 221 to move is disposed on the rotating rod 223.

[0034] like Figure 2 and Figure 4 The linkage member includes a passive gear 23 coaxially fixed on the rotating rod 223, the passive gear 23 is located on the side of the driving gear 224 away from the fixed plate 222, the closing plate 221 is provided with a slide groove 231 at a side position below the passive gear 23, the slide groove 231 is distributed along the moving direction of the closing plate 221, and a driven rack 232 is provided at the bottom of the slide groove 231. The inner wall of the protective cover 2 is rotatably connected with a driven gear 233 meshing with the driven rack 232. The driven gear 233 is rotatably connected to the inner wall of the protective cover 2 through a rotating shaft 234. A transition gear 235 is coaxially fixedly sleeved on the outer wall of the rotating shaft 234. The transition gear 235 and the passive gear 23 are connected by an annular chain 236, that is, the transition gear 235 and the passive gear 23 are sprockets meshing with the chain 236, and one end of the driven rack 232 is in a groove on the side of the slide groove 231 away from the wall 1. The guide plate 227 is provided with a plurality of teeth on the guide groove 226, and the plurality of teeth on the guide groove 226 are provided with a plurality of teeth on the guide groove 226.

[0035] like Figure 2 and Figure 4When the cabinet 21 moves upward into the protective cover 2 , a limiting member is provided on the closing plate 221 to limit the movement of the closing plate 221 .

[0036] like Figure 1 and Figure 3 The limiting member includes a baffle 25 arranged on a side of the closing plate 221 facing the wall 1, the baffle 25 extends vertically downward, one side of the baffle 25 contacts a side of the cabinet 21 facing away from the wall 1, and a plurality of balls (not shown in the figure) are embedded in the baffle 25 on the side facing the cabinet 21, which are in contact with the outer wall of the cabinet 21, and a movable groove 251 is provided on the mouth wall of the opening 22 for the closing plate 221 to slide into on the side close to the wall 1.

[0037] Working principle of the drive:

[0038] When the closing plate 221 needs to be opened so that the cabinet 21 gradually descends and moves out of the opening 22, the motor drives the rotating rod 223 to rotate, so that the rotating rod 223 drives the driving gear 224 to rotate and rotates simultaneously with the driven gear 23;

[0039] When the driving gear 224 rotates, the driving gear 224 and the driving rack 225 are meshed, driving the driving rack 225 to gradually descend, and at this time, the cabinet 21 also descends;

[0040] When the driven gear 23 rotates, the transition gear 235 is driven to rotate through the chain 236, and the transition gear 235 drives the driven gear 233 to rotate, and the driven gear 233 is meshed with the driven rack 232, so that the driven gear 233 gradually moves horizontally away from the wall 1, so that the closing plate 221 also moves away from the wall 1, thereby opening the opening 22;

[0041] When the cabinet 21 descends to the opening 22, the closing plate 221 has opened the opening 22, so that the lower end of the cabinet 21 moves out of the opening 22. At this time, the driven gear 233 is meshed with the convex tooth 241, and the side wall of the guide plate 227 abuts against the groove wall of the guide groove 226 away from the wall 1; as the driven gear 233 rotates, the convex tooth 241 compresses the compression spring 242 between the convex tooth 241 and the driven rack 232, so that the convex tooth 241 drives the slider 24 to move in the slide groove 231, so that when the driven gear 233 continues to rotate, the purpose of keeping the closing plate 221 stationary during the process of the motor rotating to drive the cabinet 21 to continue to descend is achieved, and the connection between the driven gear 233 and the driven rack 232 is released;

[0042] The above-mentioned cabinet 21 is shown in Figure X. The width dimension of the cabinet 21 is smaller than the height dimension. Therefore, the closing plate 221 only needs to move a distance greater than the width dimension of the cabinet 21 to facilitate the cabinet 21 to move out of the opening 22; the distance between the driving gear 224 and the bottom of the protective cover 2 is the distance that the closing plate 221 moves to open the opening 22 for the cabinet 21 to move out.

[0043] Therefore, the height of the driving gear 224 fixed by the fixing plate 222 is greater than the height of the closing plate 221, and the height above the fixing plate 222 is such that when the cabinet 21 descends to the opening 22, the closing plate 221 opens the opening 22; then, as the motor rotates, the cabinet 21 continues to descend until the upper end of the driving rack 225 engages with the driving gear 224, at which time the cabinet 21 is completely moved out of the protective cover 2.

[0044] After the operator has finished the inspection, the cabinet 21 needs to be raised into the protective cover 2. At this time, the motor needs to be reversed, so that the driving gear 224 drives the driving rack 225 to move upward, so that the cabinet 21 moves upward. In this process, due to the setting of the baffle 25, the closing plate 221 is prevented from moving horizontally toward the wall 1, so that when the driven gear 233 rotates, the convex tooth 241 compresses the compression spring 242 between the convex tooth 241 and the groove wall of the slide groove 231, so that the driven gear 233 still does not mesh with the driven rack 232 when it rotates;

[0045] When the lower end surface of the cabinet 21 moves upward out of the baffle 25, the cabinet 21 is completely located above the baffle 25. Since the baffle 25 is not blocked by the cabinet 21, when the driven gear 233 rotates, the driven gear 233 rotates from the convex tooth 241 to the driven rack 232, thereby driving the closing plate 221 to move toward the wall 1, thereby closing the opening 22.

[0046] In the above process, the purpose of automatically opening and closing the opening 22 together with the closing plate 221 is achieved when the cabinet body 21 is in the process of descending and ascending.

[0047] like Figure 2 The upper ends of the two driving racks 225 are provided with support rods 252 extending in opposite directions. When the cabinet 21 is located at the outer wall of the protection cover 2, the support rods 252 collide with the bottom of the protection cover 2, and the end of the support rods 252 away from the driving racks 225 is slidably connected to the inner wall of the protection cover 2. At this time, the setting of the support rods 252 achieves the purpose of strengthening the strength of the connection between the cabinet 21 and the protection cover 2, thereby achieving the purpose of stabilizing the position of the cabinet 21.

[0048] like Figure 2 and Figure 5When the cabinet 21 is located in the protective cover 2 , the inner wall of the protective cover 2 is provided with a hanging piece for hanging the cabinet 21 , and the hanging piece makes the position of the cabinet 21 in the protective cover 2 stable.

[0049] like Figure 2 and Figure 5 The hanging member includes a vertical rod 26 arranged on the top of the protective cover 2, and a hook 261 is circumferentially arranged at the lower end of the vertical rod 26, which is bent and extended upward. At this time, the longitudinal section of the hook 261 is an upper curved surface and a lower curved surface located below the upper curved surface. A connecting block 262 is arranged on the outer wall of the upper end of the cabinet 21. An entry groove 263 is provided on the upper end surface of the connecting block 262 for the hook 261 to enter. Two relatively distributed placement grooves 264 are provided on the groove wall of the entry groove 263. The two placement grooves 264 are both slidably connected with a blocking rod 265. The bottom of the two placement grooves 264 are provided with an extrusion spring 266 that allows one end of the blocking rod 265 to extend out of the notch of the placement groove 264. The upper end surface of the blocking rod 265 is set as an upper inclined surface 27 that cooperates with the lower curved surface of the hook 261, and the lower end surface is set as a lower inclined surface 271 that cooperates with the upper curved surface of the hook 261. The vertical rod 26 is provided with a releasing member for releasing the lower inclined surface 271 from the upper curved surface of the hook 261.

[0050] like Figure 2 and Figure 5 , that is, when the cabinet 21 is rising, the hook 261 moves into the entry groove 263. At this time, the lower curved surface of the hook 261 squeezes the upper inclined surface 27 of the blocking rod 265, and then squeezes the blocking rod 265 into the placement groove 264, squeezing the squeezing spring 266 to have an elastic restoring force. When the lower curved surface of the hook 261 is separated from the upper inclined surface 27, the elastic restoring force of the squeezing spring 266 pushes one end of the blocking rod 265 out of the notch of the placement groove 264 again, so that the lower inclined surface 271 on the lower end surface of the blocking rod 265 contacts the upper curved surface of the hook 261, thereby realizing the hanging of the cabinet 21. At this time, since the cabinet 21 is hung up, the meshing rotation of the driving gear 224 and the driving rack 225 is restricted, and the meshing rotation of the driven gear 233 and the driven rack 232 is also restricted, thereby restricting the movement of the closing plate 221, thereby achieving the purpose of self-locking of the closing plate 221. When the cabinet body 21 needs to be moved out of the cabinet body 21 , the release member is required to release the cooperation between the lower inclined surface 271 and the upper curved surface of the rain hook 261 .

[0051] like Figure 2 and Figure 5The release member includes a slide cylinder 272 coaxially slidably connected to the outer wall of the vertical rod 26, the lower end surface of the slide cylinder 272 is set to a lower conical surface 273 that cooperates with the upper inclined surface 27, the outer wall of the slide cylinder 272 is an upper conical surface 274 for one end of the blocking rod 265 to slide, and the upper end of the slide cylinder 272 is provided with a blocking cylinder 275 sleeved on the outer wall of the vertical rod 26, and the end of the blocking cylinder 275 away from the slide cylinder 272 is fixedly connected to the inner wall of the protective cover 2, and the lower end surface of the blocking cylinder 275 is provided with a vertical groove 276 for the tension spring 277 to be placed, the upper end of the tension spring 277 is fixedly connected to the bottom of the vertical groove 276, and the lower end is fixedly connected to the upper end surface of the slide cylinder 272. When the tension spring 277 is in a natural state, the upper end surface of the slide cylinder 272 contacts the lower end surface of the blocking cylinder 275.

[0052] like Figure 2 and Figure 5 , the working principle of the release member: when the cabinet 21 needs to be released from the hook, the cabinet 21 is first moved upward, and the closing plate 221 will continue to move toward the wall 1. In order to facilitate the movement of the closing plate 221, one end of the closing plate 221 enters the moving groove 251. When one end of the closing plate 221 is located at the notch of the moving groove 251, the closing plate 221 closes the opening 22. In addition, the closing plate 221 can also be set on the lower end surface of the protective cover 2 (this state is not drawn in the figure), and the guide plate 227 is set on the upper end surface of the closing plate 221 and slides with the guide groove 226;

[0053] like Figure 2 and Figure 5 After the closing plate 221 closes the opening 22, as the cabinet 21 continues to move upward to release the hook, the closing plate 221 only needs to continue to slide on the lower end surface of the protective cover 2; after the cabinet 21 moves upward, the upper inclined surface 27 on the hook 261 is squeezed by the lower conical surface 273, so that the blocking rod 265 enters the placement groove 264 again, and then slides out of the lower conical surface 273, and the blocking rod 265 is pressed by the squeezing spring 266. The notch of the placement slot 264 is moved out and contacts the upper conical surface 274. Then the cabinet 21 descends, so that the blocking rod 265 squeezes the upper conical surface 274, causing the slide 272 to move downward until the lower end of the slide 272 contacts the hook 261, thereby causing one end of the blocking rod 265 to slide out of the slide 272 and the hook 261 from the upper conical surface 274. The cabinet 21 continues to descend, and the blocking rod 265 will not be hindered, making it easy to release the connection between the blocking rod 265 and the hook 261.

[0054] like Figure 1 The side walls of the protective cover 2 are provided with a plurality of heat dissipation holes 28 to facilitate heat dissipation of the active filter cabinet.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An active filter cabinet that can be expanded and assembled, characterized in that: The invention comprises a protective cover (2) detachably connected to a wall (1) and a cabinet (21) located inside the protective cover (2); an opening (22) for the cabinet (21) to be moved out of or into the protective cover (2) is provided at the lower end of the protective cover (2); a closing plate (221) for closing the opening (22) is slidably connected to the bottom of the protective cover (2); and a driving member for driving the cabinet (21) to move out of the opening (22) and to open the closing plate (221) is provided inside the protective cover (2); The driving member comprises two opposite fixing plates (222) arranged at the lower end of the inner wall of the protective cover (2); a rotating rod (223) is rotatably connected between the two fixing plates (222); two fixing plates (222) are respectively extended from both ends of the rotating rod (223); and a driving gear (224) is coaxially fixedly connected to both extended ends; and a driving rack (225) meshing with the driving gear (224) is provided on both end outer walls of the cabinet (21); the driving rack (225) is distributed along the height direction of the cabinet (21); and the lower end of the driving rack (225) extends to the lower end surface of the cabinet (21). , the upper end of which extends a distance beyond the upper end of the cabinet (21); when the cabinet (21) is located outside the protective cover (2), the driving gear (224) meshes with the upper end of the driving rack (225); a fixing plate (222) for mounting the driving gear (224) is located on the inner wall of the protective cover (2) facing the wall (1) at the front side; an opening wall of the opening (22) extends beyond the side of the protective cover (2) away from the wall (1); a long guide groove (226) is provided on the opposite opening walls of the opening (22); and guide plates (227) that slide along the guide groove (226) are provided at both ends of the closing plate (221); The outer wall of the protective cover (2) is provided with a motor for driving the rotating rod (223) to rotate, and one end of the rotating rod (223) extends to the outer wall of the protective cover (2) and is coaxially connected to the motor, and the rotating rod (223) is provided with a linkage member for driving the closing plate (221) to move; The linkage member comprises a driven gear (23) coaxially fixed on a rotating rod (223), the driven gear (23) being located on a side of the driving gear (224) away from the fixed plate (222), the closing plate (221) being provided with a slide groove (231) at a side position below the driven gear (23), the slide groove (231) being distributed along the moving direction of the closing plate (221), a driven rack (232) being provided at the bottom of the slide groove (231), the inner wall of the protective cover (2) being rotatably connected with a driven gear (233) meshing with the driven rack (232), the driven gear (233) being rotatably connected to the inner wall of the protective cover (2) via a rotating shaft (234), the outer wall of the rotating shaft (234) being coaxially fixedly provided with a transition gear (235), the transition gear (235) and the driven gear (23) being connected via an annular chain (236) ), one end of the driven rack (232) is fixedly connected to a groove wall of a side of the slide groove (231) away from the wall (1), and a gap exists between the other end and another groove wall of the slide groove (231); a slider (24) is slidably connected in the slide groove (231); a convex tooth (241) which is the same as a single tooth on the driven rack (232) is provided at the upper end of the slider (24); compression springs (242) are provided at both ends of the slider (24); one end of one compression spring (242) away from the slider (24) is fixedly connected to the groove wall of the slide groove (231), and the other end of the compression spring (242) away from the slider (24) is fixedly connected to a side wall of the driven rack (232); when the driven gear (233) is meshed with the convex tooth (241), a side wall of the guide plate (227 abuts against the groove wall of the guide groove (226); When the cabinet (21) moves upwards and enters the protective cover (2), a limiting member for limiting the movement of the closing plate (221) is provided on the closing plate (221).

2. The expandable and retractable active filter cabinet as claimed in claim 1, characterized in that: The limiting member comprises a baffle (25) arranged on a side of the closing plate (221) facing the wall (1), the baffle (25) extending vertically downward, one side of the baffle (25) in contact with a side of the cabinet (21) facing away from the wall (1), a plurality of balls abutting against an outer wall of the cabinet (21) are embedded in the side of the baffle (25) facing the cabinet (21), and a movable groove (251) is provided on the mouth wall of the opening (22) for the closing plate (221) to slide into on a side close to the wall (1).

3. The expandable and retractable active filter cabinet as claimed in claim 2, characterized in that: The upper ends of the two driving racks (225) are each provided with a support rod (252) extending in opposite directions; when the cabinet (21) is located on the outer wall of the protective cover (2), the support rod (252) contacts the bottom of the protective cover (2); and one end of the support rod (252) away from the driving rack (225) is slidably connected to the inner wall of the protective cover (2).

4. The expandable and retractable active filter cabinet as claimed in claim 2, characterized in that: The distance between the driving gear (224) and the bottom of the protective cover (2) is the distance that the closing plate (221) moves to open the opening (22) for the cabinet (21) to move out.

5. The expandable and retractable active filter cabinet as claimed in claim 2, characterized in that: When the cabinet body (21) is located inside the protective cover (2), the inner wall of the protective cover (2) is provided with a hanging piece for hanging the cabinet body (21).

6. The expandable and retractable active filter cabinet as claimed in claim 5, characterized in that: The hanging member comprises a vertical rod (26) arranged at the top of the protective cover (2), a hook (261) bent and extended upwardly is circumferentially arranged at the lower end of the vertical rod (26), a connecting block (262) is arranged on the outer wall of the upper end of the cabinet (21), an entry groove (263) for the hook (261) to enter is provided on the upper end surface of the connecting block (262), two placement grooves (264) arranged opposite to each other are provided on the groove wall of the entry groove (263), and a blocking rod is slidably connected to each of the two placement grooves (264). (265), the bottoms of the two placement grooves (264) are each provided with a compression spring (266) that allows one end of the blocking rod (265) to extend out of the notch of the placement groove (264), the upper end surface of the blocking rod (265) is set as an upper inclined surface (27) that matches the lower curved surface of the hook (261), and the lower end surface is set as a lower inclined surface (271) that matches the upper curved surface of the hook (261), and the vertical rod (26) is provided with a release member that releases the lower inclined surface (271) from matching the upper curved surface of the rain hook (261).

7. The expandable and retractable active filter cabinet as claimed in claim 6, characterized in that: The release member comprises a slide cylinder (272) coaxially slidably connected to the outer wall of the vertical rod (26); the lower end surface of the slide cylinder (272) is provided as a lower conical surface (273) matched with the upper inclined surface (27); the outer wall of the slide cylinder (272) is an upper conical surface (274) for sliding one end of the blocking rod (265); the upper end of the slide cylinder (272) is provided with a blocking cylinder (275) sleeved on the outer wall of the vertical rod (26); the blocking cylinder (275) is away from the slide cylinder (2 One end of the retaining cylinder (275) is fixedly connected to the inner wall of the protective cover (2), and a vertical groove (276) for receiving the tension spring (277) is provided on the lower end surface of the retaining cylinder (275). The upper end of the tension spring (277) is fixedly connected to the bottom of the vertical groove (276), and the lower end is fixedly connected to the upper end surface of the sliding cylinder (272). When the tension spring (277) is in a natural state, the upper end surface of the sliding cylinder (272) contacts the lower end surface of the retaining cylinder (275).

8. The expandable and retractable active filter cabinet as claimed in claim 1, characterized in that: The side walls of the protection cover (2) are each provided with a plurality of heat dissipation holes (28).

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