A rotary valve mechanism for switchgear

Abstract

The application discloses a rotary valve mechanism of a switch cabinet, and belongs to the technical field of valve mechanisms of switch cabinets. The valve mechanism comprises an upper metal valve and a lower metal valve, the outer side of the upper metal valve and the outer side of the lower metal valve are respectively fixed with an upper insulating valve plate and a lower insulating valve plate for shielding a static contact, further comprising a sliding groove plate for driving the upper metal valve and the lower metal valve to rotate and open, and a connecting rod mechanism for driving the sliding groove plate to move upwards. The valve mechanism adopts a single connecting rod and a shaft sleeve cooperation driving mode, and has the advantages of simple structure, convenient installation and reliable interlocking. The connecting rod mechanism is used for driving the sliding groove plate to move upwards, the rotary motion of the valve is converted, the static contact is exposed, and a tension spring is used for automatic resetting. The valve assembly composed of the upper and lower insulating valve plates and the upper and lower metal valves can effectively utilize the space of a handcart room of the switch cabinet, save materials, reduce cost, improve the insulation performance of the switch cabinet, and increase the reliability and safety of the switch equipment in operation.

Description

Technical Field

[0001] The invention relates to a switch cabinet rotary valve mechanism, belonging to the technical field of switch cabinet valve mechanisms. Background Art

[0002] Switchgear is electrical equipment used to open, close, control, and protect electricity during the generation, transmission, distribution, and conversion processes of power systems. Key electrical components within a switchgear include a trolley compartment, busbar contacts, outgoing line contacts, cable compartment, and instrument compartment. The trolley compartment is typically located in the center of the front of the switchgear. High-strength rails are installed on the left and right sides of the compartment. A trolley-type circuit breaker is inserted into the compartment via these rails, where its moving contacts engage with the stationary contacts in the contact box (the upper and lower rows of stationary contacts in the contact box represent the busbar contacts and the lower rows represent the outgoing line contacts). To enhance safety, a shutter mechanism is required on the outside of the contacts. This shutter shields the stationary contacts between the trolley-type circuit breaker when it is extended and before it is inserted. This shutter ensures insulation distance requirements for various voltage levels and prevents contact with high-voltage live parts caused by the high voltage at the upper end. Currently, the shutter mechanism utilizes a multi-link, sliding, and translating structure. This multi-link drive structure is complex, inconvenient to install, and requires improved interlocking reliability.

[0003] Therefore, a switch cabinet rotary valve mechanism is designed. Compared with the existing mechanism, it has a simple and reliable rotation motion interlocking mode and an automatic tension spring reset structure, so that the valve mechanism can operate more safely and reliably. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a switch cabinet rotary valve mechanism, which solves the problem of complex structure of the current switch cabinet valve mechanism.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0006] Solution 1: A switch cabinet rotary shutter mechanism includes an upper metal shutter and a lower metal shutter hingedly mounted within the switch cabinet via a pin. Upper and lower insulating shutter plates for shielding static contacts are fixed to the outer sides of the upper and lower metal shutters, respectively. The mechanism also includes a slide plate for rotating the upper and lower metal shutters open, and a connecting rod mechanism for moving the slide plate upward.

[0007] A driving plate is fixed on both sides of the upper metal valve and the lower metal valve respectively. The middle part of the driving plate is hinged to the pins fixed to the left and right side plates of the switch cabinet. A driving waist-shaped hole extending radially along the pin is opened on the driving plate.

[0008] The slide plate is fixed with two upper and lower eccentric pin shafts, and the slide plate is provided with two upper and lower vertical slide grooves. The two symmetrically arranged slide plates are respectively installed at the upper and lower pin shafts on the corresponding side through the vertical slide grooves. The eccentric pin shafts on the slide plate are inserted into the driving waist-shaped holes of the driving plate at the corresponding position. The slide plate is connected to the switch cabinet below through a tension spring, wherein the upper and lower eccentric pin shafts are respectively located on both sides of the pin shaft. When the slide plate moves upward, the upper eccentric pin shaft drives the upper metal valve to rotate upward, and the lower eccentric pin shaft drives the lower metal valve to rotate downward;

[0009] The connecting rod mechanism includes a connecting rod, a positioning bracket, a fixed plate, and a shaft sleeve. One end of the connecting rod is hinged to the positioning bracket and fixed in the switch cabinet through the positioning bracket. A hinged waist-shaped hole is provided at the other end of the connecting rod. The hinged waist-shaped hole end of the connecting rod is tilted downward and hinged to the bottom of the slide plate. The fixed plate is fixed on the trolley. A shaft sleeve is provided on the fixed plate that contacts the lower edge of the connecting rod. When the fixed plate moves forward with the trolley, the shaft sleeve pushes the hinged waist-shaped hole end of the connecting rod to deflect upward, thereby driving the slide plate to move up.

[0010] Solution 2: Based on Solution 1, in order to achieve the front test position of the trolley insertion, the upper metal valve and the lower metal valve are not opened; only after the trolley is further inserted, the upper metal valve and the lower metal valve will be opened, forming a two-stage effect.

[0011] Preferably, the lower edge of the connecting rod is sequentially provided with a horizontal section and an inclined section starting from the entry end, the sleeve does not push the connecting rod to deflect upward in the horizontal section, and the sleeve gradually pushes the connecting rod to deflect upward starting from the inclined section.

[0012] Option 3: Based on Option 1, in order to further optimize the space occupied by the upper and lower metal valves, and because the contact box protrudes forward, the upper and lower metal valves need to adopt a rotating rectangular frame structure to cover the contact box. Therefore, the upper and lower metal valves are made of bent metal plates.

[0013] Preferably, the upper metal valve and the lower metal valve both adopt a rectangular frame structure with one side open formed by bending the two ends of a metal plate 90° to the same side. The upper insulating valve plate and the lower insulating valve plate are fixed in the middle of the metal plate, and the bent two sides of the metal plate are hingedly installed between the left and right side plates of the switch cabinet through a drive plate and a pin shaft.

[0014] Option 4: Based on Option 1, a tension spring bracket is designed to facilitate the installation and replacement of tension springs.

[0015] Preferably, one end of the tension spring is hooked on the bottom of the slide plate, and the other end is hooked on the through hole of the tension spring bracket fixed in the switch cabinet.

[0016] Plan 5: Based on Plan 1, the strength of the pin fixing structure is optimized.

[0017] Preferably, the ends of the pins are fixed to pin plates, which are fixed to the left and right side plates of the switch cabinet. The pin plate fixing structure with a large area is less likely to cause deformation of the switch cabinet side plates.

[0018] The beneficial effects of the present invention are:

[0019] (1) This valve mechanism adopts a driving mode of single connecting rod and shaft sleeve, which has simple structure, easy installation and reliable interlocking;

[0020] (2) A connecting rod mechanism is used to drive the slide plate installed on the side to move up, which is converted into a rotating motion of the valve, exposing the static contact, and a downward tension spring is used to achieve automatic reset;

[0021] (3) The use of a valve assembly composed of upper and lower insulating valve plates and upper and lower metal valves can effectively utilize the space in the switch cabinet trolley room, save materials, reduce costs, and at the same time improve the insulation performance of the switch cabinet and increase the reliability and safety of the switch equipment during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the front structure of the present invention;

[0024] Figure 3 It is a partial enlarged schematic diagram of the connection structure between the slide plate and the pin shaft;

[0025] Figure 4 It is a structural diagram of the connecting rod mechanism;

[0026] Figure 5 It is a schematic diagram of the top view of the structure of the present invention;

[0027] Figure 6 Schematic diagram of the connection structure between the slide plate and the tension spring.

[0028] In the figure: 1. Pin; 101. Pin plate; 2. Upper metal valve; 3. Lower metal valve; 4. Upper insulating valve plate; 5. Lower insulating valve plate; 6. Slide plate; 601. Eccentric pin; 602. Slide; 7. Drive plate; 701. Drive waist-shaped hole; 8. Tension spring; 801. Tension spring bracket; 9. Connecting rod; 901. Articulated waist-shaped hole; 902. Horizontal section; 903. Inclined section; 904. Arc section; 10. Positioning bracket; 11. Fixing plate; 12. Bushing; 13. Connecting rod pin. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments.

[0030] Example 1

[0031] like Figure 1 As shown, the rotary valve mechanism of the switch cabinet includes an upper metal valve 2 and a lower metal valve 3 hingedly installed in the switch cabinet through a pin shaft 1. The outer sides of the upper metal valve 2 and the lower metal valve 3 are respectively fixed with an upper insulating valve plate 4 and a lower insulating valve plate 5 for shielding the static contact. The upper metal valve 2, the lower metal valve 3, the upper insulating valve plate 4 and the lower insulating valve plate 5 constitute a valve assembly for rotary motion, and also include a slide plate 6 for driving the upper metal valve 2 and the lower metal valve 3 to rotate open, and a connecting rod mechanism for driving the slide plate 6 to move upward.

[0032] like Figure 1 、 Figure 2 As shown, a drive plate 7 is riveted and fixed on both sides of the upper metal valve 2 and the lower metal valve 3. The middle part of the drive plate 7 is hinged to the pin 1 fixed to the left and right side plates of the switch cabinet. A drive waist-shaped hole 701 extending radially along the pin 1 is opened on the drive plate 7.

[0033] like Figure 1 、 Figure 3 As shown, the slide plate 6 is welded and fixed with two upper and lower eccentric pin shafts 601, and the slide plate 6 is provided with two upper and lower vertical slide grooves 602. The two symmetrically arranged slide plates 6 are respectively installed at the upper and lower pin shafts 1 on the corresponding side through the vertical slide grooves 602. The eccentric pin shaft 601 on the slide plate 6 is inserted into the driving waist-shaped hole 701 of the driving plate 7 at the corresponding position. The slide plate 6 is connected to the switch cabinet below through the tension spring 8. The upper and lower eccentric pin shafts 601 are respectively located on both sides of the pin shaft 1. When the slide plate 6 moves upward, the upper eccentric pin shaft 601 drives the upper metal valve 2 to rotate upward, and the lower eccentric pin shaft 601 drives the lower metal valve 3 to rotate downward.

[0034] like Figure 1 、 Figure 4 As shown, the connecting rod mechanism includes a connecting rod 9, a positioning bracket 10, a fixing plate 11, and a sleeve 12. One end of the connecting rod 9 is hinged to the positioning bracket 10 through a connecting rod pin 13 and is fixed in the switch cabinet through the positioning bracket 10. A hinged waist-shaped hole 901 is provided at the other end of the connecting rod 9. The hinged waist-shaped hole 901 end of the connecting rod 9 is tilted downward and hinged to the bottom of the slide plate 6. The fixing plate 11 is fixed on the trolley. A sleeve 12 is provided on the fixing plate 11 to contact the lower edge of the connecting rod 9. When the fixing plate 11 moves forward with the trolley, the sleeve 12 pushes the hinged waist-shaped hole 901 end of the connecting rod 9 to deflect upward, thereby driving the slide plate 6 to move upward.

[0035] like Figures 1-6As shown, the working principle:

[0036] (1) When the trolley is pushed from the test position to the working position, the bushings 12 fixed on the fixed plates 11 on the left and right sides of the trolley first contact the connecting rod 9, and then move forward close to the lower edge of the connecting rod 9, causing the connecting rod 9 to deflect upward with the hinge point with the positioning bracket 10 as the fulcrum.

[0037] (2) The connecting rod 9 drives the slide plate 6 to move vertically upward, that is, the pin shaft 1 used to hinge the upper metal valve 2 and the lower metal valve 3 slides relatively in the two slide grooves 602 of the slide plate 6, and the slide plate 6 moves upward.

[0038] (3) The eccentric pin 601 on the chute plate 6 slides in the drive waist-shaped hole 701 on the drive plate 7. Since the eccentric pin 601 is dispersed on both sides of the pin 1 (such as Figure 1 In the figure, the lower eccentric pin 601 is located on the left side, and the upper eccentric pin 601 is located on the right side of the pin 1), which can correspondingly achieve the opposite deflection directions of the upper and lower metal valves 3, so that when the slide plate 6 moves upward, the upper eccentric pin 601 drives the upper metal valve 2 to rotate upward, and the lower eccentric pin 601 drives the lower metal valve 3 to rotate downward. After the valve assembly is fully opened, the moving contact on the trolley circuit breaker extends into the contact box and engages with the static contact.

[0039] (4) When the trolley is pushed back from the working position to the test position, the valve mechanism moves in the opposite direction. The connecting rod 9 is reset by the downward tension spring 8 without the push of the fixed plate 11 and the shaft sleeve 12, and the upper and lower valve assemblies return to the initial closed position, covering the static contact in the contact box installed on the middle partition. Since an insulating valve plate is installed on the valve, the insulation distance requirements of a certain voltage level are met, and it is prevented that people touch the high-voltage live body due to the high-voltage live at the upper end.

[0040] The valve mechanism adopts a driving mode of a single connecting rod 9 and a shaft sleeve 12, which has a simple structure, easy installation and reliable interlocking. The connecting rod mechanism drives the slide plate 6 installed on the side to move upward, which is converted into a rotating motion of the valve, exposing the static contact, and a downward tension spring 8 is used to achieve automatic reset.

[0041] The use of a valve assembly composed of upper and lower insulating valve plates 5 and upper and lower metal valves 3 can effectively utilize the space in the switch cabinet trolley room, save materials, reduce costs, and at the same time improve the insulation performance of the switch cabinet and increase the reliability and safety of the switch equipment during operation.

[0042] Example 2

[0043] like Figure 4As shown, the other structures are the same as those in Example 1. The lower edge of the connecting rod 9 is provided with a horizontal section 902 and an inclined section 903 in sequence starting from the entry end. An arc section 904 is provided between the horizontal section 902 and the inclined section 903 for transition. The shaft sleeve 12 does not push the connecting rod 9 to deflect upward in the horizontal section 902. The shaft sleeve 12 gradually pushes the connecting rod 9 to deflect upward starting from the inclined section 903.

[0044] In the front test position when the trolley is inserted, the sleeve 12 is in the arc segment 904, and the upper metal valve 2 and the lower metal valve 3 are not opened; only when the trolley is further inserted, the upper metal valve 2 and the lower metal valve 3 will be opened, forming a two-stage effect.

[0045] Example 3

[0046] like Figure 5 As shown, other structures are the same as those in Example 1. In order to further optimize the space occupied by the upper metal valve 2 and the lower metal valve 3, and because the contact box protrudes forward, the upper metal valve 2 and the lower metal valve 3, if they adopt a rotating rectangular frame structure, can cover the protruding contact box, so a metal plate bending structure is adopted. Figure 5 In the embodiment, the contact box is arranged in the concave space surrounded by the upper metal shutter 2 and the lower metal shutter 3.

[0047] The upper metal valve 2 and the lower metal valve 3 both adopt a rectangular frame structure with one side open formed by bending the two ends of a metal plate 90° to the same side. The upper insulating valve plate 4 and the lower insulating valve plate 5 are fixed in the middle of the metal plate. The bent two sides of the metal plate are hingedly installed between the left and right side plates of the switch cabinet through the drive plate 7 and the pin shaft 1.

[0048] The upper metal door 2 and the lower metal door 3 both adopt a rectangular frame structure with one side open, and can be set close to the inner wall of the cabinet to reduce the impact on the space used by internal electrical components.

[0049] Example 4

[0050] like Figure 4 、 Figure 6 As shown, other structures are the same as those in Example 1. In order to facilitate the installation and replacement of the tension spring 8, a tension spring bracket 801 is designed.

[0051] One end of the tension spring 8 is hooked on the bottom of the chute plate 6, and the other end is hooked on the through hole of the tension spring bracket 801 fixed in the switch cabinet. The long-term use of the tension spring 8 can cause metal fatigue, and the tension spring 8 can be easily replaced by the through hole.

[0052] Example 5

[0053] like Figure 3 As shown, the other structures are the same as those in Example 1, and the strength of the fixing structure of the pin shaft 1 is optimized.

[0054] The end of the pin 1 is welded and fixed on the pin plate 101, and the pin plate 101 is fixed to the left and right side plates of the switch cabinet. The fixing structure of the pin plate 101 with a large area is not easy to cause deformation of the switch cabinet side plate.

[0055] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments and that various modifications and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such modifications and improvements are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A switch cabinet rotary shutter mechanism comprising an upper metal shutter and a lower metal shutter hingedly mounted in the switch cabinet via a pin, wherein an upper insulating shutter plate and a lower insulating shutter plate for shielding a static contact are fixed to the outer sides of the upper metal shutter and the lower metal shutter, respectively, and characterized in that: It also includes a slide plate for driving the upper metal valve door and the lower metal valve door to rotate and open, and a connecting rod mechanism for driving the slide plate to move upward; A driving plate is fixed on both sides of the upper metal valve and the lower metal valve respectively. The middle part of the driving plate is hinged to the pins fixed to the left and right side plates of the switch cabinet. A driving waist-shaped hole extending radially along the pin is opened on the driving plate. The slide plate is fixed with two upper and lower eccentric pin shafts, and the slide plate is provided with two upper and lower vertical slide grooves. The two symmetrically arranged slide plates are respectively installed at the upper and lower pin shafts on the corresponding side through the vertical slide grooves. The eccentric pin shafts on the slide plate are inserted into the driving waist-shaped holes of the driving plate at the corresponding position. The slide plate is connected to the switch cabinet below through a tension spring, wherein the upper and lower eccentric pin shafts are respectively located on both sides of the pin shaft. When the slide plate moves upward, the upper eccentric pin shaft drives the upper metal valve to rotate upward, and the lower eccentric pin shaft drives the lower metal valve to rotate downward; The connecting rod mechanism includes a connecting rod, a positioning bracket, a fixed plate, and a shaft sleeve. One end of the connecting rod is hinged to the positioning bracket and fixed in the switch cabinet through the positioning bracket. A hinged waist-shaped hole is provided at the other end of the connecting rod. The hinged waist-shaped hole end of the connecting rod is tilted downward and hinged to the bottom of the slide plate. The fixed plate is fixed on the trolley. A shaft sleeve is provided on the fixed plate that contacts the lower edge of the connecting rod. When the fixed plate moves forward with the trolley, the shaft sleeve pushes the hinged waist-shaped hole end of the connecting rod to deflect upward, thereby driving the slide plate to move up.

2. A switch cabinet rotary door mechanism according to claim 1, characterized in that: The lower edge of the connecting rod is sequentially provided with a horizontal section and an inclined section starting from the entry end. The sleeve does not push the connecting rod to deflect upward in the horizontal section, and the sleeve gradually pushes the connecting rod to deflect upward starting from the inclined section.

3. The switch cabinet rotary door mechanism according to claim 1, characterized in that: The upper metal valve and the lower metal valve both adopt a rectangular frame structure with one side open formed by bending the two ends of a metal plate 90° to the same side. The upper insulating valve plate and the lower insulating valve plate are fixed in the middle of the metal plate. The bent two sides of the metal plate are hingedly installed between the left and right side plates of the switch cabinet through a drive plate and a pin shaft.

4. The switch cabinet rotary door mechanism according to claim 1, characterized in that: One end of the tension spring is hooked on the bottom of the slide plate, and the other end is hooked on the through hole of the tension spring bracket fixed in the switch cabinet.

5. The switch cabinet rotary door mechanism according to claim 1, characterized in that: The ends of the pin shafts are fixed on the pin shaft plates, and the pin shaft plates are fixed on the left and right side plates of the switch cabinet.

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