Safety interlocking mechanism of vacuum contactor
By designing a safety interlock mechanism for vacuum contactors, the interlocking of contactors is achieved using components such as movable plates, magnets, gears, and sprockets. This solves the problems of complex existing interlocking structures and high failure rates, and improves safety and stability.
Patent Information
- Application Number
- CN202423248536.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing vacuum contactors have complex interlocking structures, high failure rates, and compromise safety during use.
A safety interlock mechanism for vacuum contactors is adopted. Through the design of the interlock components, the contactors are interlocked by using moving plates in opposite directions and components such as magnets, gears, and sprockets to ensure that the contactors do not close at the same time.
This improves the safety of contactor use, avoids the risk of short circuits caused by interlock failures, and enhances stability and reliability.
Smart Images
Figure CN223858075U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vacuum contactor related technical field especially relates to a vacuum contactor safety interlocking mechanism. BACKGROUND
[0002] Vacuum contactor is mainly composed of vacuum arc extinguishing chamber and operating mechanism, and the vacuum arc extinguishing chamber has two functions of reliable arc extinguishing when passing through normal working current and frequently cutting off working current, but cannot cut off overload current and short-circuit current. The operating mechanism is composed of an attracting coil with an iron core and an armature, the coil is electrified to attract the armature, and the contactor is closed; the coil loses electricity, and the contactor is disconnected. The attracting coil is generally in two forms of direct current and alternating current, the shell of the vacuum arc extinguishing chamber is made of glass or ceramic insulating material, and the vacuum degree inside is usually above 0.01Pa. Because there is little air in the shell, the contact gap can be made very small, and the arc is also relatively easy to be extinguished. The contact material is generally made of copper, antimony and osmium alloy. The shielding cover in the arc extinguishing chamber helps to extinguish the arc when breaking the current, and can also prevent the metal vapor from splashing onto the insulating shell to reduce the insulation strength. The movable contact is connected with the lower end of the shell by a corrugated pipe, and can move up and down without air leakage. In order to solve the complex electrical environment and increase the safety in use, two contactors are generally used to form a reversible contactor group in many electrical equipment. However, in order to ensure the normal operation of the two contactors, an interlocking structure is generally used to interlock the two contactors.
[0003] The existing contactor interlocking structure generally realizes the mutual locking function of the two contactors through electrical locking. However, the electrical locking structure has high failure rate due to its complex internal structure after long time use. Once the interlocking function cannot be realized, short circuit may occur, which affects the safety in use and has certain improvement space. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a vacuum contactor safety interlocking mechanism to solve the problem of high failure rate of the existing interlocking device due to its complex internal structure, which easily affects the safety in use.
[0005] In order to realize the above purpose, the utility model provides the following technical scheme: a vacuum contactor safety interlocking mechanism, which comprises an interlocking frame, a connecting assembly fixedly connected to the upper and lower surfaces of the interlocking frame, a strip-shaped slot formed in the left and right sides of the interlocking frame, and an interlocking assembly slidably connected to the inner wall of the strip-shaped slot. The connecting assembly comprises a first mounting plate and a second mounting plate, and the opposite surfaces of the first mounting plate and the second mounting plate are screw-connected with two locking bolts.
[0006] The interlocking assembly comprises two sliders, the opposite faces of the two sliders are fixedly connected with a first movable plate and a second movable plate respectively, the opposite faces of the first movable plate and the second movable plate are fixedly connected with a first magnet, a first counterweight, a second magnet and a second counterweight respectively, the opposite faces of the two sliders are fixedly connected with a first rack plate and a second rack plate respectively, the inner bottom wall of the interlocking frame is fixedly connected with two positioning rods, the inner front wall of the interlocking frame is rotatably connected with a first circular rod and a second circular rod, the surfaces of the first circular rod and the second circular rod are fixedly connected with a first gear and a second gear respectively, the surfaces of the first circular rod and the second circular rod are fixedly connected with a first sprocket and a second sprocket, and the first sprocket and the second sprocket are transmissionally connected with a chain.
[0007] Preferably, the two sliders are slidably connected with the inner walls of the strip-shaped grooves on the left and right sides of the interlocking frame respectively, and the first movable plate and the second movable plate are slidably connected with the left and right sides of the interlocking frame respectively.
[0008] Preferably, the first movable plate and the second movable plate are in opposite positions, when the slider driven by the first movable plate is at the top end of the left strip-shaped groove, the slider driven by the second movable plate is at the bottom end of the right strip-shaped groove.
[0009] Preferably, the first magnet and the second magnet are above the first movable plate and the second movable plate, and the first counterweight and the second counterweight are below the first movable plate and the second movable plate.
[0010] Preferably, the first rack plate and the second rack plate are provided with a plurality of racks on the sides away from the sliders, and the first rack plate and the second rack plate are engaged with the first gear and the second gear respectively.
[0011] Preferably, the positions of the first rack plate and the second rack plate correspond to the positions of the two positioning rods respectively, and the first rack plate and the second rack plate are slidably connected with the surfaces of the two positioning rods respectively.
[0012] Preferably, the horizontal positions of the first sprocket and the second sprocket correspond to each other, and the chain is in a horizontal state.
[0013] Compared with the prior art, the vacuum contactor safety interlocking mechanism has the advantages that: when in use, the first movable plate and the second movable plate in opposite directions can be used as an interlocking structure to interlock two contactors, when one of the contactors is closed, the electromagnetic coil is started to attract the first magnet to make the first movable plate rise, at this time, the second movable plate is in a lower position and does not displace due to the limiting effect of the first gear, the first sprocket, the chain, the second sprocket and the second gear, and the stability is higher, so that it can be ensured that the other contactor will not be closed after one contactor is closed, and the use safety is improved. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a three-dimensional structure schematic view of the utility model;
[0015] Figure 2 It is a three-dimensional structure schematic view of the utility model;
[0016] Figure 3 It is a three-dimensional structure schematic view of the utility model;
[0017] Figure 4 It is a three-dimensional structure schematic view of the utility model.
[0018] In the drawing: 1, interlocking frame; 2, first mounting plate; 3, second mounting plate; 4, locking bolt; 5, sliding block; 6, first movable plate; 7, second movable plate; 8, first magnet; 9, first counterweight; 10, second magnet; 11, second counterweight; 12, first rack plate; 13, second rack plate; 14, positioning rod; 15, first round rod; 16, second round rod; 17, first gear; 18, second gear; 19, first sprocket; 20, second sprocket; 21, chain. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0020] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a vacuum contactor safety interlocking mechanism, including interlocking frame 1, the upper and lower surfaces of interlocking frame 1 are all fixedly connected with connecting assembly, the left and right sides of interlocking frame 1 are all provided with strip slot, the inner wall of strip slot is slidably connected with interlocking assembly, connecting assembly includes first mounting plate 2 and second mounting plate 3, the opposite surface of first mounting plate 2 and second mounting plate 3 is all screw-connected with two locking bolts 4;
[0021] The interlocking assembly comprises the sliding blocks 5, the opposite sides of the two sliding blocks 5 are fixedly connected with the first movable plate 6 and the second movable plate 7 respectively, the opposite sides of the first movable plate 6 and the second movable plate 7 are fixedly connected with the first magnet 8, the first counterweight 9, the second magnet 10 and the second counterweight 11 respectively, the opposite sides of the two sliding blocks 5 are fixedly connected with the first rack plate 12 and the second rack plate 13 respectively, the inner bottom wall of the interlocking frame 1 is fixedly connected with the two positioning rods 14, the inner front wall of the interlocking frame 1 is rotatably connected with the first circular rod 15 and the second circular rod 16, the surfaces of the first circular rod 15 and the second circular rod 16 are fixedly connected with the first gear 17 and the second gear 18 respectively, the surfaces of the first circular rod 15 and the second circular rod 16 are fixedly connected with the first sprocket 19 and the second sprocket 20 respectively, and the first sprocket 19 and the second sprocket 20 are transmissionally connected with the chain 21.
[0022] Further, the two sliding blocks 5 are slidably connected with the inner walls of the strip-shaped grooves on the left and right sides of the interlocking frame 1 respectively, and the first movable plate 6 and the second movable plate 7 are slidably connected with the left and right sides of the interlocking frame 1 respectively.
[0023] Further, the first movable plate 6 and the second movable plate 7 are in opposite positions, when the first movable plate 6 drives the sliding block 5 to be at the top end of the left strip-shaped groove, the second movable plate 7 drives the sliding block 5 to be at the bottom end of the right strip-shaped groove, the first movable plate 6 and the second movable plate 7 in opposite positions can achieve the interlocking effect, avoiding the situation that the two contactors are closed at the same time.
[0024] Further, the first magnet 8 and the second magnet 10 are above the first movable plate 6 and the second movable plate 7, and the first counterweight 9 and the second counterweight 11 are below the first movable plate 6 and the second movable plate 7, the attraction effect generated after the electromagnetic coil is started can adsorb the first magnet 8, and at the same time, the second movable plate 7 is affected by the gravity of the second counterweight 11, avoiding the contact between the second magnet 10 and the electromagnetic coil of the other contactor.
[0025] Further, the first rack plate 12 and the second rack plate 13 are provided with a plurality of racks on the sides away from the sliding blocks 5, and the first rack plate 12 and the second rack plate 13 are engaged with the first gear 17 and the second gear 18 respectively, when the first rack plate 12 rises, it can drive the first gear 17 to rotate clockwise, and when it descends, it can drive the first gear 17 to rotate counterclockwise.
[0026] Further, the positions of the first rack plate 12 and the second rack plate 13 correspond to the positions of the two positioning rods 14 respectively, the first rack plate 12 and the second rack plate 13 are in surface sliding connection with the two positioning rods 14 respectively, the first rack plate 12 and the second rack plate 13 can move up and down on the surfaces of the two positioning rods 14 respectively during the up and down movement, the first rack plate 12 and the second rack plate 13 will not appear any deviation condition under the limiting effect of the positioning rods 14, and the stability is higher.
[0027] Further, the horizontal positions of the first sprocket 19 and the second sprocket 20 correspond, and the chain 21 is in a horizontal state, the first sprocket 19 can stably drive the second sprocket 20 and the second circular rod 16 to rotate through the chain 21 after being affected by the rotating effect of the first circular rod 15.
[0028] Working principle: first, the two ends of the interlocking frame 1 are fixedly installed with the two vacuum contactors by the first mounting plate 2 and the second mounting plate 3, after the installation is completed, after one of the contactors is closed, the electromagnetic coil generates an attractive effect, so as to drive the first magnet 8 to rise, the first magnet 8 can drive the first movable plate 6 and the sliding block 5 to rise, so as to drive the first gear 17 to rotate clockwise through the first rack plate 12, at this time, the first circular rod 15 drives the second circular rod 16 and the second gear 18 to rotate clockwise synchronously through the first sprocket 19 and the chain 21, so as to drive the sliding block 5 and the second movable plate 7 to descend through the second rack plate 13, so that the second magnet 10 is away from the electromagnetic coil of the other contactor, and the other electromagnetic coil generates an attractive effect after starting to attract the second magnet 10 upwards, so as to drive the left first movable plate 6 to descend, so as to complete the interlocking effect, and the two contactors will not appear the closing condition synchronously under the limiting action of the first gear 17, the second gear 18, the first sprocket 19 and the second sprocket 20 during the attractive process of the electromagnetic coil, and the safety is higher.
[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A safety interlock mechanism for a vacuum contactor, comprising an interlock frame (1), wherein connecting components are fixedly connected to the upper and lower surfaces of the interlock frame (1), and strip grooves are provided on both the left and right sides of the interlock frame (1), with interlock components slidably connected to the inner walls of the strip grooves, characterized in that: The connecting assembly comprises a first mounting plate (2) and a second mounting plate (3), and two locking bolts (4) are threadedly connected to opposite surfaces of the first mounting plate (2) and the second mounting plate (3); The interlocking assembly comprises sliders (5), first movable plates (6) and second movable plates (7) fixedly connected to opposite surfaces of the sliders (5), respectively, first magnets (8), first counterweights (9) and second magnets (10), second counterweights (11) fixedly connected to opposite surfaces of the first movable plates (6) and the second movable plates (7), respectively, first rack plates (12) and second rack plates (13) fixedly connected to opposite surfaces of the sliders (5), an inner bottom wall of the interlocking frame (1) is fixedly connected with two positioning rods (14), an inner front wall of the interlocking frame (1) is rotatably connected with a first circular rod (15) and a second circular rod (16), surfaces of the first circular rod (15) and the second circular rod (16) are fixedly connected with a first gear (17) and a second gear (18), respectively, surfaces of the first circular rod (15) and the second circular rod (16) are fixedly connected with a first sprocket (19) and a second sprocket (20), respectively, and the first sprocket (19) and the second sprocket (20) are transmissionally connected with a chain (21) therebetween.
2. A vacuum contactor safety interlock mechanism according to claim 1, wherein: The two sliders (5) are slidably connected with inner walls of the bar-shaped grooves on left and right sides of the interlocking frame (1), and the first movable plates (6) and the second movable plates (7) are slidably connected with left and right sides of the interlocking frame (1), respectively.
3. A vacuum contactor safety interlock mechanism according to claim 1, wherein: The first movable plates (6) and the second movable plates (7) are in opposite positions, when the first movable plates (6) drive the sliders (5) to be at the top end of the left bar-shaped groove, the second movable plates (7) drive the sliders (5) to be at the bottom end of the right bar-shaped groove.
4. A vacuum contactor safety interlock mechanism according to claim 1, wherein: The first magnets (8) and the second magnets (10) are above the first movable plates (6) and the second movable plates (7), and the first counterweights (9) and the second counterweights (11) are below the first movable plates (6) and the second movable plates (7).
5. A vacuum contactor safety interlock mechanism according to claim 1, wherein: The first rack plates (12) and the second rack plates (13) are provided with a plurality of racks on sides away from the sliders (5), and the first rack plates (12) and the second rack plates (13) are engaged with the first gear (17) and the second gear (18), respectively.
6. A vacuum contactor safety interlock mechanism according to claim 1, wherein: The positions of the first rack plates (12) and the second rack plates (13) correspond to positions of the two positioning rods (14), respectively, and the first rack plates (12) and the second rack plates (13) are slidably connected with surfaces of the two positioning rods (14).
7. A vacuum contactor safety interlock mechanism according to claim 1, wherein: The first sprocket (19) and the second sprocket (20) are horizontally positioned, and the chain (21) is in a horizontal state.