Switch cabinet
By setting up an upper rear door and a lower rear door on the rear side of the cabinet body of the switch cabinet, and interlocking is achieved by using the structure of the slide fixing plate, the door opening slide and the door closing slide, the problem that the lifting door cannot be effectively interlocked with the grounding switch is solved, and the safety performance of the switch cabinet is improved.
Patent Information
- Application Number
- CN202421336082.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-12
AI Technical Summary
In some applications where space is limited, traditional hinged revolving doors cannot be used. The lifting doors are divided into two upper and lower doors, but they cannot be effectively interlocked with the ground switch, resulting in insufficient safety.
A switch cabinet is designed, by providing an upper rear door and a lower rear door on the rear side of the cabinet body, and interlocking between the upper rear door and the lower rear door is achieved by using the structure of the slide fixing plate, the door opening slide and the door closing slide. By setting the rear door interlocking bend rod on the second connecting rod, the upper rear door and the grounding switch are achieved, and interlocking between the lower rear door and the grounding switch is achieved by the unlocking pin, the first connecting rod and the second connecting rod.
The interlock between the upper rear door, lower rear door and the grounding switch is realized to prevent misoperation, ensure the safety of operation, and improve the safety performance of the switch cabinet.
Smart Images
Figure CN222673606U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of power equipment, and in particular to a switch cabinet. Background Art
[0002] Switchgear is widely used in the power distribution system of power grid, mainly for switching, controlling and protecting power transmission and distribution.
[0003] The switch cabinet usually includes a cabinet body, in which various electrical components are installed, such as circuit breaker switches, three-position switches, grounding switches, etc. With the continuous development of the times, people have increasingly stringent requirements on product safety. This requires that in the design and development stage of the product, full consideration must be given to preventing safety accidents caused by user misoperation.
[0004] In actual applications, there are many types of switch cabinets. In some applications, due to space limitations, such as obstruction by walls or cables, traditional hinged revolving doors cannot be used. Therefore, most switch cabinets use lifting doors to reduce space occupation and thus adapt to complex environments. In some applications, such as when a junction box needs to be installed in the middle of the lifting door, the lifting door is divided into two upper and lower doors.
[0005] However, most switch cabinets currently consider the problem of opening and closing a single door and interlocking it with a grounding switch. This single-door interlocking method cannot be directly applied to the situation of upper and lower doors and a grounding switch. There is an urgent need for a method to interlock the two doors to prevent live operation and ensure safety. Utility Model Content
[0006] In order to solve the problem in the related art that the upper and lower doors cannot be effectively interlocked with the grounding switch, the present disclosure provides a switch cabinet, which can realize the interlocking of the grounding switch and the upper and lower doors to prevent misoperation and ensure the safety of operation.
[0007] The present disclosure provides a switch cabinet, comprising:
[0008] The cabinet body is provided with an upper rear door and a lower rear door which can be lifted upwards, an upper hook is provided at the lower end of the upper rear door, and a lower hook is provided at the upper end of the lower rear door;
[0009] A grounding switch is arranged in the cabinet;
[0010] A grounding knife operating shaft is drivingly connected to the grounding switch;
[0011] An unlocking pin is used to unlock the ground knife operating shaft so that the ground knife operating shaft can rotate after being unlocked;
[0012] A first connecting rod connected to the unlocking pin and used to drive the unlocking pin to move; and
[0013] A second connecting rod, which is connected to the first connecting rod, the first connecting rod and the second connecting rod form an angle, the second connecting rod extends in a horizontal direction, and the second connecting rod is provided with a rear door interlocking bent rod bent toward the first connecting rod;
[0014] A slide fixing plate, fixed to the rear edge of the cabinet and located between the lower rear door and the upper rear door, the slide fixing plate having a first slide groove and a second slide groove extending in a vertical direction;
[0015] a door opening slide, inserted into the first slide groove, and extending from the upper rear door to the lower rear door, with a first upper opening hole for inserting the upper hook being formed at the upper end of the door opening slide, and a first lower opening hole for inserting the lower hook being formed at the lower end of the door opening slide; and
[0016] a door-closing slide, inserted into the second slide groove, and extending from the position of the upper rear door to the lower rear door, with a second upper opening for inserting the upper hook being provided at the upper end of the door-closing slide, and a second lower opening for inserting the rear door interlocking bent rod being provided at the lower end of the door-opening slide;
[0017] When closing the door: the upper rear door is closed first, the upper hook is inserted into the first upper opening and the second upper opening, pressing the door opening slide and the door closing slide to move downward, so that the second lower opening is opposite to the rear door interlocking bent rod, and the lower rear door can be closed. The lower rear door is closed, and the lower hook is inserted into the first lower opening. The lower rear door pushes the second connecting rod to move toward the inside of the cabinet, so that the rear door interlocking bent rod is inserted into the second lower opening, and the second connecting rod drives the lower end of the first connecting rod to move toward the inside of the cabinet, and the upper end of the first connecting rod drives the unlocking pin to move toward the outside of the cabinet, unlocking the ground knife operating shaft.
[0018] Optionally, an interlocking plate located below the lower hook is further provided at the upper end of the lower rear door, and the switch cabinet further includes:
[0019] A cam, which is arranged on the ground cutter operating shaft and can rotate along with the ground cutter operating shaft;
[0020] A pressure plate is located below the cam. When the cam rotates in the opening direction, the pressure plate can be pressed downward and approached toward the interlocking plate. The distance between the pressure plate and the interlocking plate is reduced, thereby preventing the lower rear door from being lifted up. When the cam rotates in the closing direction, the pressure plate moves upward. When the door is fully closed, the distance between the pressure plate and the interlocking plate reaches a predetermined distance, and the lower rear door can be lifted up.
[0021] Optionally, the switch cabinet further comprises at least two reset springs, at least one of the reset springs connects the slide fixing plate and the door opening slide, and at least another reset spring connects the slide fixing plate and the door closing slide.
[0022] Optionally, a guide bending piece extending out of the cabinet is provided at the second upper opening on the door closing slide, and the guide bending piece has a rounded corner.
[0023] Optionally, the distance between the door opening slide and the upper rear door is smaller than the distance between the door closing slide and the upper rear door, and the hole center of the first upper opening of the door opening slide is lower than the hole center of the second upper opening of the door closing slide.
[0024] Optionally, the pressing plate includes a pressing plate body and an upper transverse portion and a lower transverse portion perpendicular to the pressing plate body, wherein the upper transverse portion is opposite to the cam and is located below the cam;
[0025] The lower transverse portion is located above the interlocking plate;
[0026] The pressure plate body is provided with at least one long through hole, and a connecting piece passes through the long through hole to position the pressure plate body on the inner wall of the cabinet. The pressure plate body can move up and down relative to the connecting piece under the push of the cam.
[0027] Optionally, a hanging plate is connected to one end of the connecting member passing through the long through hole, a tension spring is provided on the hanging plate, an upper end of the tension spring is connected to the hanging plate, and a lower end of the tension spring is connected to the pressure plate.
[0028] Optionally, a clamping wheel and a pin shaft mounting seat are provided on the ground cutter operating shaft, the pin shaft mounting seat has two opposite side plates, the unlocking pin passes through the two side plates of the pin shaft mounting seat, the clamping wheel has a notch, and the unlocking pin is opposite to the notch;
[0029] When the lower rear door is opened, the second connecting rod moves toward the outside of the cabinet, driving the lower end of the first connecting rod to move toward the outside of the cabinet. When the upper end of the first connecting rod moves toward the inside of the cabinet, the unlocking pin is pushed to move toward the clamping wheel. One end of the unlocking pin is clamped into the notch of the clamping wheel to lock the ground knife operating shaft.
[0030] After the upper rear door is closed and the lower rear door is closed, the second connecting rod moves toward the inside of the cabinet, driving the lower end of the first connecting rod to move toward the inside of the cabinet, and the rear door interlocking bent rod is inserted into the second lower opening. When the upper end of the first connecting rod moves toward the outside of the cabinet, the unlocking pin is pulled away from the clamping wheel, and one end of the unlocking pin disengages from the notch of the clamping wheel to unlock the ground knife operating shaft.
[0031] Optionally, the switch cabinet further comprises: a second connecting rod mounting seat, mounted on the inner side wall of the cabinet body, the second connecting rod mounting seat comprising a horizontal portion and two side portions vertically bent in the same direction from two ends of the horizontal portion, and the second connecting rod passes through the two side portions;
[0032] a collar disposed on the second connecting rod between the two side portions;
[0033] A compression spring is sleeved on the second connecting rod and is located in the second connecting rod mounting seat. One end of the compression spring is connected to the collar, and the other end is connected to the side portion close to the first connecting rod.
[0034] Optionally, the door closing slide includes a main body, a bending plate arranged at the lower end of the main body and bent vertically toward the inside of the cabinet, and a vertical portion extending downward from the end of the bending plate, and the second lower opening is opened on the vertical portion.
[0035] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:
[0036] The present application provides a switch cabinet, which includes a cabinet body and a grounding switch arranged in the cabinet body, a grounding knife operating shaft connected to the grounding switch, an unlocking pin for unlocking or locking the grounding knife operating shaft, a first connecting rod and a second connecting rod, and a slide fixing plate, a door opening slide plate and a door closing slide plate for interlocking an upper rear door and a lower rear door. The rear side of the cabinet body is provided with an upper rear door and a lower rear door that can be lifted, an upper hook is provided at the lower end of the upper rear door, and a lower hook is provided at the upper end of the lower rear door. The second connecting rod is provided with a rear door interlocking bent rod bent toward the first connecting rod. The slide fixing plate is fixed to the rear side edge of the cabinet body and is located between the lower rear door and the upper rear door, and the slide fixing plate has a first slide groove and a second slide groove extending in a vertical direction. The door opening slide plate is inserted into the first slide groove, and the door opening slide plate extends from the upper rear door to the lower rear door, and the upper end of the door opening slide plate is provided with a first upper opening hole for inserting the upper hook, and the lower end of the door opening slide plate is provided with a first lower opening hole for inserting the lower hook. The door closing slide is inserted into the second slide slot, and the door closing slide extends from the position of the upper rear door to the lower rear door, and the upper end of the door closing slide is provided with a second upper opening hole for the upper hook to be inserted, and the lower end of the door opening slide is provided with a second lower opening hole for the rear door interlocking curved rod to be inserted. When closing the door: the upper rear door is closed first, the upper hook is inserted into the first upper opening hole and the second upper opening hole, and the door opening slide and the door closing slide are pressed to move downward, so that the second lower opening hole is opposite to the rear door interlocking curved rod, and the lower rear door can be closed. The lower rear door is closed, the lower hook is inserted into the first lower opening hole, and the lower rear door pushes the second connecting rod to move toward the inside of the cabinet, so that the rear door interlocking curved rod is inserted into the second lower opening hole, and the second connecting rod drives the lower end of the first connecting rod to move toward the outside of the cabinet, and the upper end of the first connecting rod drives the unlocking pin to move toward the outside of the cabinet, unlocking the floor knife operating shaft. The present application realizes the interlocking of the upper rear door that cannot be opened unless the lower rear door is opened by cooperating the door opening slide with the lower hook of the lower rear door. When the door opening slide is disengaged from the lower hook of the lower rear door, that is, when the lower rear door is opened, the door opening slide moves upward, so that the first upper opening of the door opening slide moves upward, and the upper hook of the upper rear door has space to lift up, so that the upper rear door can be opened. When closing, the upper rear door is closed first, so that the door closing slide moves downward, and the second lower opening of the door closing slide is opposite to the rear door interlocking curved rod, so that the lower rear door can be closed. When the lower rear door is closed, the lower hook is inserted into the first lower opening, and the rear door interlocking curved rod is inserted into the second lower opening. If the upper rear door is not closed, the door closing slide does not expose the second lower opening, and is blocked by the door closing slide. The rear door interlocking bent rod cannot move toward the cabinet, and the lower rear door cannot be closed. At the same time, since the rear door interlocking bent rod is set on the second connecting rod that is interlocked with the lower rear door and the grounding switch, the second connecting rod cannot move toward the cabinet, and the grounding switch cannot be unlocked, thereby realizing the interlocking of the upper rear door and the grounding switch. In this way, the interlocking between the upper rear door and the lower rear door is realized by the structure of the slide fixing plate, the door opening slide and the door closing slide, the interlocking of the upper rear door and the grounding switch is realized by setting the rear door interlocking bent rod on the second connecting rod, and the interlocking of the lower rear door and the grounding switch is realized by the unlocking pin, the first connecting rod and the second connecting rod.Therefore, by realizing the interlocking among the lower rear door, the upper rear door and the grounding switch, misoperation can be prevented, the safety of operation is guaranteed, and the safety performance of the switch cabinet is improved.
[0037] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0039] Figure 1 The figure is a schematic three-dimensional diagram of a partial structure of a switch cabinet according to an exemplary embodiment.
[0040] Figure 2 It is a structural schematic diagram showing that the lower rear door is opened and the ground knife operating shaft is in a locked state according to an exemplary embodiment.
[0041] Figure 3 The figure is a schematic rear side view of an upper rear door of a switch cabinet according to an exemplary embodiment.
[0042] Figure 4 is a schematic cross-sectional view of an upper rear door according to an exemplary embodiment.
[0043] Figure 5 The figure is a schematic rear side view of a lower rear door of a switch cabinet according to an exemplary embodiment.
[0044] Figure 6 is a schematic cross-sectional view of a lower rear door according to an exemplary embodiment.
[0045] Figure 7 It is a front view of an unlocking pin, a first connecting rod and a second connecting rod for unlocking or locking a ground cutter operating shaft according to an exemplary embodiment.
[0046] Figure 8 It is a three-dimensional schematic diagram of an unlocking pin, a first connecting rod and a second connecting rod for unlocking or locking a ground knife operating shaft according to an exemplary embodiment.
[0047] Fig. 9 yes Figure 2 A partial enlarged view of area A in the middle.
[0048] Fig.10 It is a structural schematic diagram showing that the upper rear door and the lower rear door are closed and the ground knife operating shaft is in an unlocked state according to an exemplary embodiment.
[0049] Fig.11 yes Fig.10 A partial enlarged view of area B in the middle.
[0050] Fig.12 It is the front view of the slide fixing plate, the door opening slide and the door closing slide.
[0051] Fig.13 and Fig.14 It is a three-dimensional schematic diagram of a slide fixing plate, a door opening slide and a door closing slide at two different angles. DETAILED DESCRIPTION
[0052] In order to further illustrate the principle and structure of the present disclosure, preferred embodiments of the present disclosure are now described in detail with reference to the accompanying drawings.
[0053] Switchgear is usually used for the control and distribution of higher voltages in power grids. Therefore, the safety performance requirements for switchgear are also relatively strict. In order to ensure safety, switchgear is usually required to have "five protection" functions, for example, to prevent the disconnector from opening and closing under load, to prevent the circuit breaker, load switch, contactor from opening and closing by mistake, to prevent the circuit breaker, load switch and other switches from closing when the grounding switch is in the closed position, to prevent the grounding switch from closing by mistake when energized, and to prevent accidental entry into the energized compartment. The main purpose of this application is to prevent accidental entry into the energized compartment, that is, to prevent maintenance personnel from accidentally entering the energized compartment to ensure the safety of maintenance personnel.
[0054] As described in the background technology, most switch cabinets currently use a single rear door, and the main function is to open and close the single rear door and interlock it with the grounding switch. There are also some double rear doors with hinges, but the application of such double rear doors has certain limitations. For example, a certain space is required between the cabinet rear door and the wall (i.e., the space for the rear door to rotate), or when there is a secondary cable control box at the rear of the cabinet, the secondary cable routing makes it impossible for the hinged revolving door to be fully opened, and it can only be opened at a very small angle. In view of these limitations of the double rear door with hinges, especially when a secondary cable control box is provided, a double lifting door is usually used. However, there is currently no more effective solution for how to interlock the double lifting door with the grounding switch, and how to interlock the double lifting doors with each other. The present application provides a switch cabinet, which provides an interlocking structure, and the interlocking structure can realize the interlocking of the double rear door (i.e., the lifting door) with the grounding switch and the interlocking of the double rear doors with each other.
[0055] Specifically, Figure 1 and Figure 2 As shown, the switch cabinet 1 includes a cabinet body 11. An upper rear door 111 and a lower rear door 112 are arranged at the rear side of the cabinet body 11, and a cable box 113 is arranged between the upper rear door 111 and the lower rear door 112. The arrangement of the cable box 113 divides the rear door into the upper rear door 111 and the lower rear door 112.
[0056] The upper rear door 111 and the lower rear door 112 are lifting doors, that is, the upper rear door 111 and the lower rear door 112 can be opened only after being lifted up.
[0057] like Figure 3 and Figure 4 As shown, the upper rear door 111 is installed on the upper section of the cabinet 11, and the upper rear door 111 can be opened or closed relative to the cabinet 11. An upper hook 1111 is provided at the lower end of the upper rear door 111 and at the position of the side frame of the door panel. The upper hook 1111 protrudes from the inner side of the upper rear door 111 toward the inside of the cabinet 11. A lifting hook 1112 is also provided at the upper end of the upper rear door 111 and at the position of the side frame of the door panel. When the upper rear door 111 is closed, the lifting hook 1112 cooperates with the opening on the door frame of the cabinet 11, and the upper rear door 111 cannot be opened horizontally. The upper rear door 111 can only be opened by lifting it up and disengaging it from the opening.
[0058] The left and right corners of the upper end of the upper rear door 111 can also be respectively provided with a lifting hook 1112. The lower end of the upper rear door 111 is different from the other corner where the upper hook 1111 is provided and can also be provided with a lifting hook 1112.
[0059] like Figure 5 and Figure 6 As shown, the lower rear door 112 is installed at the lower section of the cabinet 11, and the lower rear door 112 can be opened or closed relative to the cabinet 11. A lower hook 1121 is provided at the lower end of the lower rear door 112 and at the position of the side frame of the door panel. The lower hook 1121 protrudes from the inner side of the lower rear door 112 to the inside of the cabinet 11. A lower lifting hook 1123 is also provided at the lower end of the lower rear door 112 and at the position of the side frame of the door panel. When the lower rear door 112 is closed, the lower lifting hook 1123 cooperates with the opening on the door frame of the cabinet 11, and the lower rear door 112 cannot be opened horizontally. The lower rear door can only be opened by lifting up and disengaging from the opening.
[0060] A hook 1121 may be provided at the left and right corners of the lower end of the lower rear door 112 , and a pull hook 1123 may be provided at the left and right corners of the upper end of the lower rear door 112 .
[0061] The lower rear door 112 is also provided with an interlocking plate 1122, which extends into the interior of the cabinet 11 and is in the shape of a long strip. The interlocking plate 1122 is fixed by fasteners 1124 such as bolts that penetrate from the outer surface of the lower rear door 112. Bolt caps and the like are located on the outer surface of the lower rear door 112, so that in an emergency, such as when the interlocking device fails, the interlocking plate 1122 can be removed from the outer side of the lower rear door 112 to release the interlocking.
[0062] The upper hook 1111 on the upper rear door 111 and the lower hook 1121 on the lower rear door 112 are both locking hooks, and the lower hook 1121 on the lower rear door 112 is longer than the upper hook 1111 on the upper rear door 111 .
[0063] Combination Figure 1 , Figure 7 and Figure 8 As shown, a grounding switch 12 and a grounding knife operating shaft 13 are installed in the cabinet 11. The grounding knife operating shaft 13 is connected to the opening and closing rotating shaft 121 of the grounding switch 12 through a transmission structure such as a gear. When the grounding knife operating shaft 13 rotates, the opening and closing rotating shaft 121 is driven to rotate, thereby realizing the closing and opening of the grounding switch 12.
[0064] Figure 7 and Figure 8 The figure shows the interlocking structure of the grounding switch 12, the lower rear door 112 and the upper rear door 111. Specifically, the cam 131 is arranged at one end of the grounding knife operating shaft 13. The cam 131 is an eccentric wheel.
[0065] The ground knife operating shaft 13 is also provided with a clamping wheel 134 and a pin shaft mounting seat 132. The clamping wheel 134 has a notch. The pin shaft mounting seat 132 is mounted on the inner side wall of the cabinet 11, and the pin shaft mounting seat 132 has two opposite side plates. The unlocking pin 14 passes through the two side plates of the pin shaft mounting seat 132 and can move relative to the two side plates.
[0066] The upper end of the first connecting rod 15 is movably connected to the unlocking pin 14, and the lower end of the first connecting rod 15 is movably connected to one end of the second connecting rod 16. There is an angle between the first connecting rod 15 and the second connecting rod 16. The size of the angle changes according to the movement between the first connecting rod 15 and the second connecting rod 16. The second connecting rod 16 is parallel to the ground cutter operating shaft 13, and the first connecting rod 15 is located between the second connecting rod 16 and the ground cutter operating shaft 13.
[0067] The middle portion of the first connecting rod 15 is fixed to the positioning and fixing seat 151 by means of fasteners such as bolts, so that both ends of the first connecting rod 15 can swing relative to the positioning and fixing seat 151. The positioning and fixing seat 151 is fixed to the inner wall of the cabinet 11.
[0068] Here, it should be noted that the inner wall of the cabinet mentioned in this application may refer to the inner side of the left wall or the right wall of the cabinet.
[0069] The second connecting rod mounting seat 161 is mounted on the inner wall of the cabinet 11 by bolts or other fasteners. The second connecting rod mounting seat 161 includes a horizontal portion 161a and two side portions 161b vertically bent from both ends of the horizontal portion 161a to the same direction. The second connecting rod 16 passes through the two side portions 161b.
[0070] The collar 163 is disposed on the second connecting rod 16 between the two side portions 161b. The collar 163 is sleeved on the second connecting rod 16. A stop pin 164 is disposed on one side of the collar 163 close to the lower rear door 112 to prevent the collar 163 from moving toward the lower rear door 112.
[0071] The compression spring 162 is sleeved on the second connecting rod 16 and is located in the second connecting rod mounting seat 161. One end of the compression spring 162 is connected to the collar 161, and the other end is connected to the side portion 161b close to the first connecting rod 15.
[0072] The second link 16 is also provided with a rear door interlocking bent rod 165 bent toward the first link 15. One end of the rear door interlocking bent rod 165 is fixed to the second link 16 and is located in the second link mounting seat 161. More specifically, one end of the rear door interlocking bent rod 165 is fixed between the stop pin 164 and the side portion 161b close to the lower rear door 112. The other end of the rear door interlocking bent rod 165 is in an open state.
[0073] When the lower rear door 112 is closed, the lower rear door 112 pushes the second connecting rod 16 to move toward the inside of the cabinet, and the second connecting rod 16 drives the lower end of the first connecting rod 15 to move toward the outside of the cabinet. The upper end of the first connecting rod 15 drives the unlocking pin 14 to move toward the outside of the cabinet, and the unlocking pin 14 moves away from the clamping wheel 134. One end of the unlocking pin 14 disengages from the notch of the clamping wheel 134, unlocking the floor knife operating shaft 13.
[0074] When the lower rear door 112 is opened, the second connecting rod 16 moves out of the cabinet under the action of the compression spring 162, and the second connecting rod 16 drives the lower end of the first connecting rod 15 to move out of the cabinet, and the upper end of the first connecting rod 15 drives the unlocking pin 14 to move in the cabinet, and one end of the unlocking pin 14 goes deep into the notch of the clamping wheel 134 to lock the grounding knife operating shaft 13. After the lower rear door 112 is opened, the grounding switch 12 is prevented from being closed.
[0075] like Fig. 9 As shown, it is Figure 2 A partial enlarged view of the middle A area. The pressing plate 17 is located below the cam 131. The pressing plate 17 includes a pressing plate body 171 and an upper transverse portion 172 and a lower transverse portion 173 perpendicular to the pressing plate body 171.
[0076] The upper transverse portion 172 is vertically bent from the upper end of the pressing plate body 171 and extends toward the inside of the cabinet, and the upper surface of the upper transverse portion 172 contacts the cam 131 .
[0077] The lower transverse portion 173 is vertically bent from the lower end of the pressing plate body 171 and extends toward the inside of the cabinet. The lower transverse portion 173 is located above the interlocking plate 1122 .
[0078] At least one long through hole 1711 is provided on the pressing plate body 171. In this embodiment, two long through holes 1711 may be provided. A connecting member 1712 passes through the long through hole 1711 to position the pressing plate body 171 on the inner wall of the cabinet 11. Since the long through hole 1711 has an avoidance function, it is ensured that the pressing plate 17 can move up and down relative to the connecting member 1712 under the push of the cam 131. The connecting member 1712 may be a bolt.
[0079] like Fig.10 and Fig.11 As shown, a hanging plate 1713 is connected to one end of the connecting member 1712 that passes through the long through hole 1711. A drawing groove is provided on the hanging plate 1713, and a drawing hole 1715 is correspondingly provided on the pressing plate 17. The upper end of the tension spring 1714 is connected to the hanging plate 1713, and the lower end of the tension spring 1714 is connected to the upper end wall of the drawing hole 1715 of the pressing plate 17. In this way, the tension spring 1714 maintains an upward pulling force on the pressing plate 17, so that the pressing plate 17 has a tendency to approach the cam 131.
[0080] When the cam 131 rotates in the opening direction, the pressing plate 17 moves downward, and the pressing plate 17 approaches the interlocking plate 1122, so that the interval between the pressing plate 17 and the interlocking plate 1122 is reduced. The interval is insufficient to lift the lower rear door 112, that is, the space for lifting the lower rear door 112 is much smaller than the depth of the lower hook 1121, which blocks the lower rear door 112 from lifting. In this way, the lower rear door 112 is prevented from being opened when the grounding switch 12 is opened. When the cam 131 rotates in the closing direction, the pressing of the pressing plate 17 is reduced, and the pressing plate 17 moves upward. When the closing is in place, the interval between the pressing plate 17 and the interlocking plate 1122 reaches a predetermined distance. The predetermined distance is sufficient to meet the distance required for the lower rear door 112 to lift, and the lower rear door 112 can be opened.
[0081] The upper rear door 111 can be opened only after the lower rear door 112 is opened. An interlocking structure is provided between the upper rear door 111 and the lower rear door 112. Figure 1 as well as Figure 12-14 As shown, the interlocking structure includes a slide fixing plate 21, a door opening slide 22 and a door closing slide 23.
[0082] The slide fixing plate 21 is fixed to the rear edge of the cabinet 11, specifically, fixed to the position where the cable box is located, that is, fixed between the lower rear door 112 and the upper rear door 111. The slide fixing plate 21 includes a fixing portion 211 and an upper lateral extension portion 212 and a lower lateral extension portion 213 extending from both ends of the fixing portion 211 toward the inside of the cabinet. The upper lateral extension portion 212 and the lower lateral extension portion 213 are respectively provided with two openings, so that the slide fixing plate 21 has a first slide groove 21a and a second slide groove 21b extending in the vertical direction, through which the door opening slide plate 22 and the door closing slide plate 23 pass, respectively.
[0083] The upper lateral extension portion 212 is provided with downwardly extending ears on both sides, and each side has at least two ears. Each ear is provided with a tension spring connection hole for connecting a reset tension spring 24. One end of the reset tension spring 24 is connected to the ear, and the other end is connected to the door opening slide 22 or the door closing slide 23. In one embodiment, two reset tension springs 24 are respectively provided on both sides of the upper lateral extension portion 212, which is conducive to improving the stability of the movement of the door opening slide 22 or the door closing slide 23. The reset tension spring 24 has a tendency to pull the door opening slide 22 or the door closing slide 23 upward, so that when there is no external force on the door opening slide 22 or the door closing slide 23, the door opening slide 22 or the door closing slide 23 maintains an upward movement posture.
[0084] The door opening slide 22 is inserted into the first slide groove 21a, and the door opening slide 22 extends from the upper rear door 111 to the lower rear door 112. The upper end of the door opening slide 22 is provided with a first upper opening 22a for the upper hook 1111 to be inserted, and the lower end is provided with a first lower opening 22b for the lower hook 1121 to be inserted. A positioning boss 222 is provided at the lower end of the door opening slide 22 and above the first lower opening 22b to prevent the door opening slide 22 from moving beyond the stroke.
[0085] The door closing slide 23 is inserted into the second slide groove 21b, and the door closing slide 21b extends from the position of the upper rear door 111 to the lower rear door 112. The upper end of the door closing slide 23 is provided with a second upper opening 23a for the upper hook 1111 to be inserted, and the lower end is provided with a second lower opening 23b for the rear door interlocking bent rod 165 to be inserted.
[0086] The door closing slide 23 includes a main body 231, a bent plate 232 disposed at the lower end of the main body 231 and bent vertically toward the inside of the cabinet, and a vertical portion 233 extending downward from the end of the bent plate 232. The second lower opening 23b is disposed on the vertical portion 233. Due to the provision of the bent plate 232, the distance between the second lower opening 23b and the first lower opening 22b of the door opening slide 22 is increased, thereby reserving enough space for the installation of the rear door interlocking bent rod 165.
[0087] A positioning boss 234 is provided at the lower end of the door closing slide 23 and above the bent plate 232 to prevent the door closing slide 23 from moving beyond the stroke.
[0088] A guide bending piece 235 extending out of the cabinet is provided at the second upper opening 23a on the door closing slide 23. The bending part of the guide bending piece 235 has a rounded corner, which guides the upper hook 1111 of the rear door 111, allowing the upper hook 1111 to be inserted into the second upper opening 23a more smoothly.
[0089] Both the door closing slide plate 23 and the door opening slide plate 22 can be made of channel steel, and the notches thereof are opposite to each other.
[0090] The distance between the door opening slide 23 and the upper rear door 111 (or the lower rear door 112) is smaller than the distance between the door closing slide 23 and the upper rear door 111 (or the lower rear door 112), that is, the door opening slide 23 is located between the door closing slide 23 and the upper rear door 111 (or the lower rear door 112).
[0091] The hole center of the first upper opening 22a of the door opening slide 22 is lower than the hole center of the second upper opening 23a of the door closing slide 23. In this way, when the upper hook 1111 of the upper rear door 111 is inserted into the first upper opening 22a, it is also inserted into the second upper opening 23a of the door closing slide 23. After the upper rear door 111 is closed, the upper hook 1111 pushes the door closing slide 23 to move downward, so that the second lower opening 23b is opposite to the rear door interlocking bent rod 165, and the rear door interlocking bent rod 165 can be inserted into the second lower opening 23b when the lower rear door 112 is closed.
[0092] Therefore, if the upper rear door 111 is not closed, the rear door interlocking bent rod 165 will not be opposite to the second lower opening 23b, but will be blocked by the door closing slide 23, and the second connecting rod 16 cannot move in the direction of the cabinet, and cannot drive the unlocking pin 14 to disengage the clamping wheel 134. Therefore, when the lower rear door 112 cannot be closed, the grounding knife operating shaft cannot be unlocked. Therefore, when closing the door, the upper rear door 111 must be closed, and the lower rear door 112 can be closed and the grounding knife operating shaft can be unlocked. The interlock between the upper rear door 111 and the lower rear door 112 and between the upper rear door 111 and the grounding switch 12 is realized.
[0093] Therefore, when closing the door, the upper rear door 111 is closed first, and the upper hook 1111 of the upper rear door 111 is inserted into the first upper opening 22a of the door opening slide 22 and the second upper opening 23a of the door closing slide 23, and the door opening slide 22 and the door closing slide 23 are pressed downward to move downward, so that the second lower opening 23b is opposite to the rear door interlocking bent rod 165, and the lower rear door 112 can be closed. The lower rear door 112 is closed, and the lower hook 1121 is inserted into the first lower opening 22b, and the lower rear door 112 pushes the second connecting rod 16 to move toward the inside of the cabinet, so that the rear door interlocking bent rod 165 is inserted into the second lower opening 23b, and the second connecting rod 16 drives the lower end of the first connecting rod 15 to move toward the outside of the cabinet, and the upper end of the first connecting rod 15 drives the unlocking pin to move toward the outside of the cabinet, unlocking the grounding knife operating shaft 13, and the grounding switch 12 can be operated to open the switch, such as Fig.10 and Fig.11 As shown, the upper rear door 111 and the lower rear door 112 are closed, and the ground knife operating shaft 13 is in a disengageable state.
[0094] When the grounding switch 12 is opened, the ground knife operating shaft 13 rotates in the opening direction, the cam 131 rotates in the opening direction, pressing the pressure plate 17 downward, and the pressure plate 17 approaches the direction of the interlocking plate 1122, so that the interval between the pressure plate 17 and the interlocking plate 1122 is reduced. The insufficient interval distance causes the lower rear door 112 to be lifted up, thereby preventing the lower rear door 112 from being opened when the grounding switch 12 is opened.
[0095] When opening the door, the grounding switch 12 must be closed before the door can be opened. Specifically, when the cam 131 rotates in the closing direction, the pressure plate 17 moves upward. When the door is fully closed, the distance between the lower transverse portion 173 of the pressure plate 17 and the interlocking plate 1122 reaches a predetermined distance, and the lower rear door 112 can be lifted up. The lower rear door 112 can be opened.
[0096] After the lower rear door 112 is opened, the lower hook 1121 of the lower rear door 112 is separated from the door slide 22, and the door slide 22 moves upward under the action of the return tension spring 24, and the first upper opening 22a moves upward, leaving space for the upper hook 1111 of the upper rear door 111 to move upward, that is, the space for the upper rear door 111 to be lifted is greater than the depth of the upper hook 1111, so that the upper rear door 111 can be lifted and opened. Therefore, if the lower rear door 112 is not opened first, the upper rear door 111 cannot be opened, and the interlock between the lower rear door 112 and the upper rear door 111 is realized when the door is opened.
[0097] After the lower rear door 112 is opened, the second connecting rod 16 moves toward the outside of the cabinet, driving the lower end of the first connecting rod 15 to move toward the outside of the cabinet, and the upper end of the first connecting rod 15 moves toward the inside of the cabinet, driving the unlocking pin 14 to move toward the clamping wheel 134 and extend into the notch of the clamping wheel 134, so that the grounding knife operating shaft 13 is locked to prevent the grounding switch 12 from opening when the door is opened. Figure 2 and Fig. 9 As shown, the ground knife operating shaft 13 is locked, and the upper rear door 111 and the lower rear door 112 are in an openable state.
[0098] The present application provides a switch cabinet, which includes a cabinet body and a grounding switch arranged in the cabinet body, a grounding knife operating shaft connected to the grounding switch, an unlocking pin for unlocking or locking the grounding knife operating shaft, a first connecting rod and a second connecting rod, and a slide fixing plate, a door opening slide plate and a door closing slide plate for interlocking an upper rear door and a lower rear door. The rear side of the cabinet body is provided with an upper rear door and a lower rear door that can be lifted, an upper hook is provided at the lower end of the upper rear door, and a lower hook is provided at the upper end of the lower rear door. The second connecting rod is provided with a rear door interlocking bent rod bent toward the first connecting rod. The slide fixing plate is fixed to the rear side edge of the cabinet body and is located between the lower rear door and the upper rear door, and the slide fixing plate has a first slide groove and a second slide groove extending in a vertical direction. The door opening slide plate is inserted into the first slide groove, and the door opening slide plate extends from the upper rear door to the lower rear door, and the upper end of the door opening slide plate is provided with a first upper opening hole for inserting the upper hook, and the lower end of the door opening slide plate is provided with a first lower opening hole for inserting the lower hook. The door closing slide is inserted into the second slide slot, and the door closing slide extends from the position of the upper rear door to the lower rear door, and the upper end of the door closing slide is provided with a second upper opening hole for the upper hook to be inserted, and the lower end of the door opening slide is provided with a second lower opening hole for the rear door interlocking curved rod to be inserted. When closing the door: the upper rear door is closed first, the upper hook is inserted into the first upper opening hole and the second upper opening hole, and the door opening slide and the door closing slide are pressed to move downward, so that the second lower opening hole is opposite to the rear door interlocking curved rod, and the lower rear door can be closed. The lower rear door is closed, the lower hook is inserted into the first lower opening hole, and the lower rear door pushes the second connecting rod to move toward the inside of the cabinet, so that the rear door interlocking curved rod is inserted into the second lower opening hole, and the second connecting rod drives the lower end of the first connecting rod to move toward the outside of the cabinet, and the upper end of the first connecting rod drives the unlocking pin to move toward the outside of the cabinet, unlocking the floor knife operating shaft. The present application realizes the interlocking of the upper rear door that cannot be opened unless the lower rear door is opened by cooperating the door opening slide with the lower hook of the lower rear door. When the door opening slide is disengaged from the lower hook of the lower rear door, that is, when the lower rear door is opened, the door opening slide moves upward, so that the first upper opening of the door opening slide moves upward, and the upper hook of the upper rear door has space to lift up, so that the upper rear door can be opened. When closing, the upper rear door is closed first, so that the door closing slide moves downward, and the second lower opening of the door closing slide is opposite to the rear door interlocking curved rod, so that the lower rear door can be closed. When the lower rear door is closed, the lower hook is inserted into the first lower opening, and the rear door interlocking curved rod is inserted into the second lower opening. If the upper rear door is not closed, the door closing slide does not expose the second lower opening, and is blocked by the door closing slide. The rear door interlocking bent rod cannot move toward the cabinet, and the lower rear door cannot be closed. At the same time, since the rear door interlocking bent rod is set on the second connecting rod that is interlocked with the lower rear door and the grounding switch, the second connecting rod cannot move toward the cabinet, and the grounding switch cannot be unlocked, thereby realizing the interlocking of the upper rear door and the grounding switch. In this way, the interlocking between the upper rear door and the lower rear door is realized by the structure of the slide fixing plate, the door opening slide and the door closing slide, the interlocking of the upper rear door and the grounding switch is realized by setting the rear door interlocking bent rod on the second connecting rod, and the interlocking of the lower rear door and the grounding switch is realized by the unlocking pin, the first connecting rod and the second connecting rod.Therefore, by realizing the interlocking among the lower rear door, the upper rear door and the grounding switch, misoperation can be prevented and the safety of operation can be ensured. At the same time, it can prevent accidental entry into the live compartment, ensure the safety of maintenance personnel, and improve the safety performance of the switch cabinet.
[0099] The above are only preferred feasible embodiments of the present disclosure and are not intended to limit the protection scope of the present disclosure. All equivalent structural changes made using the contents of the present disclosure and the drawings are included in the protection scope of the present disclosure.
Claims
1. A switch cabinet, characterized in that: include: The cabinet body is provided with an upper rear door and a lower rear door which can be lifted upwards, an upper hook is provided at the lower end of the upper rear door, and a lower hook is provided at the upper end of the lower rear door; A grounding switch is arranged in the cabinet; A grounding knife operating shaft is drivingly connected to the grounding switch; An unlocking pin is used to unlock the ground knife operating shaft so that the ground knife operating shaft can rotate after being unlocked; A first connecting rod, connected to the unlocking pin, and used to drive the unlocking pin to move; as well as A second connecting rod, which is connected to the first connecting rod, the first connecting rod and the second connecting rod form an angle, the second connecting rod extends in a horizontal direction, and the second connecting rod is provided with a rear door interlocking bent rod bent toward the first connecting rod; A slide fixing plate, fixed to the rear edge of the cabinet and located between the lower rear door and the upper rear door, the slide fixing plate having a first slide groove and a second slide groove extending in a vertical direction; a door opening slide, inserted into the first slide groove, and extending from the upper rear door to the lower rear door, with a first upper opening hole for inserting the upper hook being formed at the upper end of the door opening slide, and a first lower opening hole for inserting the lower hook being formed at the lower end of the door opening slide; and a door-closing slide, inserted into the second slide groove, and extending from the position of the upper rear door to the lower rear door, with a second upper opening for inserting the upper hook being provided at the upper end of the door-closing slide, and a second lower opening for inserting the rear door interlocking bent rod being provided at the lower end of the door-opening slide; When closing the door: the upper rear door is closed first, the upper hook is inserted into the first upper opening and the second upper opening, pressing the door opening slide and the door closing slide to move downward, so that the second lower opening is opposite to the rear door interlocking bent rod, and the lower rear door can be closed. The lower rear door is closed, and the lower hook is inserted into the first lower opening. The lower rear door pushes the second connecting rod to move toward the inside of the cabinet, so that the rear door interlocking bent rod is inserted into the second lower opening, and the second connecting rod drives the lower end of the first connecting rod to move toward the inside of the cabinet, and the upper end of the first connecting rod drives the unlocking pin to move toward the outside of the cabinet, unlocking the ground knife operating shaft.
2. The switch cabinet according to claim 1, characterized in that: The upper end of the lower rear door is also provided with an interlocking plate located below the lower hook, and the switch cabinet further includes: A cam, which is arranged on the ground cutter operating shaft and can rotate along with the ground cutter operating shaft; A pressure plate is located below the cam. When the cam rotates in the opening direction, the pressure plate can be pressed downward and approached toward the interlocking plate. The distance between the pressure plate and the interlocking plate is reduced, thereby preventing the lower rear door from being lifted up. When the cam rotates in the closing direction, the pressure plate moves upward. When the door is fully closed, the distance between the pressure plate and the interlocking plate reaches a predetermined distance, and the lower rear door can be lifted up.
3. The switch cabinet according to claim 1 or 2, characterized in that: The switch cabinet further comprises at least two reset springs, at least one of the reset springs connects the slide fixing plate and the door opening slide, and at least another reset spring connects the slide fixing plate and the door closing slide.
4. The switch cabinet according to claim 1 or 2, characterized in that: A guide bending piece extending out of the cabinet is arranged at the second upper opening of the door closing slide, and the guide bending piece has a rounded corner.
5. The switch cabinet according to claim 1 or 2, characterized in that: The distance between the door opening slide and the upper rear door is smaller than the distance between the door closing slide and the upper rear door, and the hole center of the first upper opening of the door opening slide is lower than the hole center of the second upper opening of the door closing slide.
6. The switch cabinet according to claim 2, characterized in that: The pressing plate comprises a pressing plate body, and an upper transverse portion and a lower transverse portion perpendicular to the pressing plate body, wherein the upper transverse portion is opposite to the cam and is located below the cam; The lower transverse portion is located above the interlocking plate; The pressure plate body is provided with at least one long through hole, and a connecting piece passes through the long through hole to position the pressure plate body on the inner wall of the cabinet. The pressure plate body can move up and down relative to the connecting piece under the push of the cam.
7. The switch cabinet according to claim 6, characterized in that: A hanging plate is connected to one end of the connecting member passing through the long through hole, a tension spring is arranged on the hanging plate, the upper end of the tension spring is connected to the hanging plate, and the lower end of the tension spring is connected to the pressing plate.
8. The switch cabinet according to claim 1 or 2, characterized in that: The ground cutter operating shaft is provided with a clamping wheel and a pin shaft mounting seat, the pin shaft mounting seat has two opposite side plates, the unlocking pin passes through the two side plates of the pin shaft mounting seat, the clamping wheel has a notch, and the unlocking pin is opposite to the notch; When the lower rear door is opened, the second connecting rod moves toward the outside of the cabinet, driving the lower end of the first connecting rod to move toward the outside of the cabinet. When the upper end of the first connecting rod moves toward the inside of the cabinet, the unlocking pin is pushed to move toward the clamping wheel. One end of the unlocking pin is clamped into the notch of the clamping wheel to lock the ground knife operating shaft. After the upper rear door is closed, when the lower rear door is closed, the second connecting rod moves toward the inside of the cabinet, driving the lower end of the first connecting rod to move toward the inside of the cabinet, and the rear door interlocking bent rod is inserted into the second lower opening. When the upper end of the first connecting rod moves toward the outside of the cabinet, the unlocking pin is pulled to move away from the clamping wheel, and one end of the unlocking pin disengages from the notch of the clamping wheel to unlock the ground knife operating shaft.
9. The switch cabinet according to claim 1 or 2, characterized in that: The switch cabinet further comprises: a second connecting rod mounting seat, mounted on the inner side wall of the cabinet body, the second connecting rod mounting seat comprising a horizontal portion and two side portions vertically bent in the same direction from both ends of the horizontal portion, the second connecting rod passing through the two side portions; a collar disposed on the second connecting rod between the two side portions; A compression spring is sleeved on the second connecting rod and is located in the second connecting rod mounting seat. One end of the compression spring is connected to the collar, and the other end is connected to the side portion close to the first connecting rod.
10. The switch cabinet according to claim 1 or 2, characterized in that: The door closing slide comprises a main body, a bending plate arranged at the lower end of the main body and bent vertically toward the inside of the cabinet, and a vertical portion extending downward from the end of the bending plate, and the second lower opening is formed on the vertical portion.