Isolating switch with self-locking mechanism

Abstract

The utility model provides an isolating switch with a self-locking mechanism, which comprises a contact knife switch arranged between a movable contact plate and a static contact plate, one end of the contact knife switch is hinged with the static contact plate, and the other end of the contact knife switch is provided with a lock catch; the hook plate is positioned below the movable contact plate and is used for being buckled with the lock catch to lock the contact knife switch and the movable contact plate; a locking structure is arranged between the contact knife switch and the movable contact plate, the locking structure comprises a positioning piece arranged on one side of the movable contact plate or the contact knife switch and an abutting rod which is arranged on the other side of the movable contact plate or the contact knife switch and can be matched with the positioning piece, when the contact knife switch is in a closed state, the abutting rod abuts against the positioning piece, and when the contact knife switch is in a closed state, the abutting rod can be matched with the positioning piece. The isolating switch is used for preventing the contact knife switch from transversely moving in the direction away from the movable contact plate, and can overcome the defect that in the prior art, the repulsive force is too large, and consequently the isolating switch is opened.

Description

Technical Field

[0001] The utility model relates to the technical field of isolating switches, in particular to an isolating switch with a self-locking mechanism. Background Art

[0002] An isolating switch is a switching device mainly used for "isolating power supplies, switching operations, and connecting and disconnecting small current circuits". When the isolating switch is in the open position, there is an insulation distance between the contacts that meets the specified requirements and an obvious disconnection mark; when it is in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time.

[0003] In the existing patent with the publication number CN102394195A, a high-voltage disconnector is disclosed, which includes a first knife switch and a second knife switch, a pull ring and a lock buckle are fixed between the first knife switch and the second knife switch, and a hook that cooperates with the lock buckle is also fixed at the end of the moving contact. When the disconnector is closed, there is a certain electric repulsion between the ends of the two knife switches and the static contact, wherein, in normal operation, the above-mentioned electric repulsion is small and insufficient to separate the two knife switches from the static contact; however, when a short circuit fault occurs, the above-mentioned electric repulsion will suddenly increase, which will not only cause the lock buckle to move away from the hook and thus separate from the hook, but also cause the two knife switches to separate from the static contact, thereby causing the disconnector to fail, affecting the reliability and safety of power supply of the power system. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of the isolating switch in the prior art that it is easy to accidentally open the switch when a short circuit occurs, thereby providing an isolating switch with a self-locking mechanism that can achieve double locking and avoid accidental opening due to repulsive force.

[0005] To this end, the utility model provides an isolating switch with a self-locking mechanism, comprising: a moving touch plate and a stationary touch plate; a knife switch, which is arranged between the moving touch plate and the stationary touch plate, one end of the knife switch is hinged to the stationary touch plate, and the other end is provided with a lock; a hook plate, which is located below the moving touch plate and is used to be engaged with the lock to lock the knife switch and the moving touch plate; a locking structure is provided between the knife switch and the moving touch plate, and the locking structure comprises a positioning piece arranged on one side of the moving touch plate or the knife switch, and an abutment rod arranged on the other side and capable of cooperating with the positioning piece, wherein when the knife switch is in a closed state, the abutment rod abuts against the positioning piece to prevent the knife switch from moving laterally in a direction away from the moving touch plate.

[0006] Further: the positioning member is located on the moving touch plate, the abutment rod is located on the knife switch, the positioning member includes a positioning plate fixed on the moving touch plate and a positioning rib located above the positioning plate, the positioning plate and the positioning rib are arranged in an "L" structure and are surrounded to form an accommodating cavity for the abutment rod to be inserted into, when the knife switch is in a closed state, the abutment rod is located in the accommodating cavity and abuts against the positioning rib.

[0007] Furthermore: the positioning rib is provided with a guiding arc surface for guiding the abutment rod to enter the accommodating cavity.

[0008] Further: the guiding arc surface includes a first arc surface located at the top of the positioning rib and a second arc surface located at the connection between the positioning rib and the positioning plate. When the knife switch is in a closed state, the abutment rod contacts the second arc surface.

[0009] Further: a contact plate for locking the knife switch and the moving touch plate is arranged on the moving touch plate, the contact plate is fixed on the moving touch plate and is located on the side of the positioning rib facing away from the accommodating cavity, the knife switch includes a first knife plate and a second knife plate arranged opposite to each other, the abutment rod is located between the first knife plate and the second knife plate, a slot is provided between the first knife plate and the second knife plate for the contact plate to be inserted into, and an inclined guide rib is provided on the first knife plate and / or the second knife plate for guiding the contact plate to be inserted into the slot.

[0010] Furthermore: the inclined guide ribs are arranged at the upper and lower ends of the first touch blade plate and the second touch blade plate.

[0011] Furthermore: it also includes a pull ring assembly, which includes a stretching part and a driven part arranged below the stretching part, the lock is arranged on the side of the driven part facing away from the stretching part, and a hook is arranged on the side of the stretching part that contacts the driven part to drive the driven part to rotate so as to separate the lock from the hook plate, and the driven part has an extension plate that abuts against the hook.

[0012] The technical solution of the utility model has the following advantages:

[0013] 1. The utility model provides an isolating switch with a self-locking mechanism. Compared with the prior art, when the knife switch is closed, the positioning piece arranged on the moving touch plate or one side of the knife switch will abut against the abutment rod, and the static touch plate and the moving touch plate will repel each other laterally when energized. Since the positioning piece abuts against the abutment rod, the moving touch plate cannot move laterally. When the moving touch plate cannot move laterally, the lock buckle and the hook plate cannot be separated, thereby avoiding the accidental opening of the knife switch and ensuring that the circuit can be effectively connected.

[0014] 2. The utility model provides an isolating switch with a self-locking mechanism, in which the positioning piece consists of a positioning plate and a positioning rib, the positioning plate is fixed above the moving touch plate, the positioning rib extends back to the positioning plate, the positioning rib and the positioning plate form an accommodating cavity for the abutment rod to be inserted into, when the knife switch switches from an open state to a closed state, the abutment rod will cross the positioning rib and be inserted into the accommodating cavity, and when the knife switch switches from a closed state to an open state, the abutment rod will be separated from the accommodating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is the overall structural diagram of the isolating switch;

[0017] Figure 2 It is a side view of the isolating switch;

[0018] Figure 3 for Figure 1 Enlarged view of part A in the middle.

[0019] Description of reference numerals:

[0020] 11. Moving touch plate; 21. Stationary touch plate; 3. Knife contact switch; 31. First knife contact plate; 32. Second knife contact plate; 4. Lock buckle; 41. Hook plate; 5. Positioning piece; 51. Positioning plate; 52. Positioning rib; 53. Accommodating chamber; 6. Abutment rod; 7. Guide arc surface; 71. First arc surface; 72. Second arc surface; 8. Contact plate; 81. Inclined guide rib; 9. Stretching part; 91. Follower part; 92. Hook piece; 93. Extension plate; 94. Positioning block; 95. Positioning groove; 96. Torsion spring; 97. Connecting part. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Example

[0026] The present embodiment provides an isolating switch with a self-locking mechanism, comprising: a moving touch plate 11 and a stationary touch plate 21; a knife gate 3, arranged between the moving touch plate 11 and the stationary touch plate 21, one end of the knife gate 3 is hinged to the stationary touch plate 21, and the other end is provided with a lock buckle 4; a hook plate 41, located below the moving touch plate 11, for being engaged with the lock buckle 4 to lock the knife gate 3 and the moving touch plate 11; a locking structure is provided between the knife gate 3 and the moving touch plate 11, the locking structure comprising a positioning member 5 arranged on one side of the moving touch plate 11 or the knife gate 3, and an abutment rod 6 arranged on the other side and capable of cooperating with the positioning member 5, wherein when the knife gate 3 is in a closed state, the abutment rod 6 abuts against the positioning member 5 to prevent the knife gate 3 from moving laterally in a direction away from the moving touch plate 11.

[0027] The above specific improvements are: Figure 1 and Figure 3As shown, compared with the prior art, when the knife switch 3 is closed, the positioning piece 5 arranged on the moving touch plate 11 or one side of the knife switch 3 will abut against the abutment rod 6. Since the static touch plate 21 and the moving touch plate 11 are energized, a lateral repulsive force will be generated, thereby driving the lock buckle 4 to disengage from the hook plate 41. When the positioning piece 5 and the abutment rod 6 abut, the moving touch plate 11 cannot move laterally due to the resistance of the positioning piece 5. When the moving touch plate 11 cannot move laterally, the lock buckle 4 and the hook plate 41 cannot be separated, thereby avoiding the accidental opening of the knife switch 3 and ensuring that the circuit can be effectively connected.

[0028] On the basis of the above embodiment: the positioning member 5 is located on the moving touch plate 11, the abutment rod 6 is located on the knife switch 3, the positioning member 5 includes a positioning plate 51 fixed on the moving touch plate 11 and a positioning rib 52 located above the positioning plate 51, the positioning plate 51 and the positioning rib 52 are arranged in an "L" structure and are surrounded to form an accommodating cavity 53 for the abutment rod 6 to be inserted into, when the knife switch 3 is in the closed state, the abutment rod 6 is located in the accommodating cavity 53 and abuts against the positioning rib 52.

[0029] The above specific improvements are: Figure 3 As shown, the positioning member 5 is composed of a positioning plate 51 and two positioning ribs 52. The positioning plate 51 is fixed above the moving touch plate 11, and the positioning rib 52 extends away from the positioning plate 51. The positioning rib 52 and the positioning plate 51 will form an accommodating cavity 53 for the abutment rod 6 to be inserted into. When the knife gate 3 switches from the open state to the closed state, the abutment rod 6 will cross the positioning rib 52 and be inserted into the accommodating cavity 53. When the knife gate 3 switches from the closed state to the open state, the knife gate 3 is rotated counterclockwise, and the abutment rod 6 will be disengaged from the accommodating cavity 53, thereby separating the knife gate 3 from the moving touch plate 11.

[0030] On the basis of the above embodiment: the positioning rib 52 is provided with a guiding arc surface 7 for guiding the abutting rod 6 to enter the accommodating cavity 53 .

[0031] The above specific improvements are: Figure 3 As shown, by providing the guiding arc surface 7, the abutting rod 6 can be guided to smoothly enter the accommodating cavity 53 when the switch is closed.

[0032] Based on the above embodiment: the guiding arc surface 7 includes a first arc surface 71 located at the top of the positioning rib 52 and a second arc surface 72 located at the connection between the positioning rib 52 and the positioning plate 51 . When the knife switch 3 is in the closed state, the abutment rod 6 contacts the second arc surface 72 .

[0033] The above specific improvements are: Figure 3As shown, the guiding arc surface 7 includes a first arc surface 71 and a second arc surface 72. The first arc surface 71 is arranged on the top of the positioning rib 52, and the second arc surface 72 is arranged at the position where the positioning rib 52 contacts the positioning plate 51. When the knife switch 3 is closed, the abutment rod 6 will first contact the first arc surface 71. When the knife switch 3 is continued to be pressed downward, the abutment rod 6 will enter the accommodating cavity 53 along with the first arc surface 71 until the arc surface of the abutment rod 6 is in contact with the second arc surface 72.

[0034] On the basis of the above embodiment: the moving touch plate 11 is provided with a contact plate 8 for locking the knife contact gate 3 and the moving touch plate 11, the contact plate 8 is fixed on the moving touch plate and is located on the side of the positioning rib 52 facing away from the accommodating chamber 53, the knife contact gate 3 includes a first knife contact plate 31 and a second knife contact plate 32 arranged opposite to each other, the abutment rod 6 is located between the first knife contact plate 31 and the second knife contact plate 32, a slot for the contact plate 8 to be inserted is provided between the first knife contact plate 31 and the second knife contact plate, and an inclined guide rib 81 for guiding the contact plate 8 to be inserted into the slot is provided on the first knife contact plate 31 and / or the second knife contact plate 32.

[0035] On the basis of the above embodiment: the inclined guide ribs 81 are provided at the upper and lower ends of the first touch blade plate 31 and the second touch blade plate 32 .

[0036] The above specific improvements are: Figure 2 As shown, the inclined guide ribs 81 are arranged at the upper and lower ends of the first touch knife plate 31 and the second touch knife plate 32. When the touch knife switch 3 is closed, the contact plate 8 will first contact the inclined guide ribs 81 at the bottom of the first touch knife plate 31 and the second touch knife plate 32, and then follow the guidance of the inclined guide ribs 81 to make the contact plate 8 inserted between the first touch knife plate 31 and the second touch knife plate 32.

[0037] On the basis of the above embodiment: it also includes a pull ring assembly, which includes a stretching portion 9 and a driven portion 91 arranged below the stretching portion 9, the lock buckle 4 is arranged on the side of the driven portion 9 facing away from the stretching portion 9, and the side of the stretching portion 9 that contacts the driven portion 91 is provided with a hook member 92 that drives the driven portion 91 to rotate so as to separate the lock buckle 4 from the hook plate 41, and the driven portion 91 has an extension plate 93 that abuts against the hook member 92.

[0038] On the basis of the above embodiment: the stretching portion 9 is provided with a positioning block 94 in contact with the driven portion 91 , and the driven portion 91 is provided with a positioning groove 95 matched with the positioning block 94 .

[0039] On the basis of the above embodiment: the pull ring assembly further includes a torsion spring 96 for driving the driven part 91 to return to its original position.

[0040] The above specific improvements are: Figure 3As shown, the pull ring assembly is used to pull up the knife switch 3 to open the isolating switch. The pull ring assembly includes a stretching portion 9 and a driven portion 91. When the stretching portion 9 is pulled up, the positioning block 94 will be stuck in the positioning groove 95, and then the hook 92 will hook the hook plate 41 to lift the driven portion 91 upward. At this time, the lock 4 is separated from the hook plate 41, and the isolating switch is unlocked and can be lifted upward counterclockwise (at this time, the torsion spring 96 in the driven portion 91 is in an elastic stretching state). When the stretching portion 9 is released by hand, the torsion spring 96 is elastically reset, which will drive the lock 4 to engage with the hook plate 41.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A disconnector with a self-locking mechanism, characterized in that: include: A moving touch panel (11) and a stationary touch panel (21); The knife switch (3) is arranged between the moving touch plate (11) and the stationary touch plate (21), one end of the knife switch (3) is hinged to the stationary touch plate (21), and the other end is provided with a lock (4); the hook plate (41) is located below the moving touch plate (11) and is used to be locked with the lock (4) to lock the knife switch (3) and the moving touch plate (11);A locking structure is provided between the knife switch (3) and the moving touch plate (11), and the locking structure comprises a positioning member (5) arranged on one side of the moving touch plate (11) or the knife switch (3), and an abutment rod (6) arranged on the other side and capable of cooperating with the positioning member (5), wherein when the knife switch (3) is in a closed state, the abutment rod (6) abuts against the positioning member (5) to prevent the knife switch (3) from moving laterally away from the moving touch plate (11), the positioning member (5) is located on the moving touch plate (11), the abutment rod (6) is located on the knife switch (3), and the positioning member (5) comprises a positioning plate (51) fixed on the moving touch plate (11) and a positioning member (52) located on the positioning member (53). A positioning rib (52) is disposed above the positioning plate (51), the positioning plate (51) and the positioning rib (52) are arranged in an "L" structure and enclose a receiving cavity (53) for the abutment rod (6) to be inserted into. When the knife switch (3) is in a closed state, the abutment rod (6) is located in the receiving cavity (53) and abuts against the positioning rib (52). A guiding arc surface (7) is disposed on the positioning rib (52) for guiding the abutment rod (6) to enter the receiving cavity (53). The guiding arc surface (7) includes a first arc surface (71) located at the top of the positioning rib (52) and a second arc surface (72) located at the connection between the positioning rib (52) and the positioning plate (51). When the knife switch (3) is in a closed state, the abutment rod (6) is located in the receiving cavity (53) and abuts against the positioning rib (52). In the closed state, the abutment rod (6) contacts the second arc surface (72); a contact plate (8) for locking the knife contact switch (3) and the movable touch plate (11) is provided on the movable touch plate (11); the contact plate (8) is fixed on the movable touch plate and is located on the side of the positioning rib (52) facing away from the accommodating cavity (53); the knife contact switch (3) comprises a first knife contact plate (31) and a second knife contact plate (32) arranged opposite to each other; the abutment rod (6) is located between the first knife contact plate (31) and the second knife contact plate (32); a slot for the contact plate (8) to be inserted is provided between the first knife contact plate (31) and the second knife contact plate (32); a contact plate (8) is provided on the first knife contact plate (31) and / or the second knife contact plate (32); There is an inclined guide rib (81) for guiding the contact plate (8) to be inserted into the slot, the inclined guide rib (81) is arranged at the upper and lower ends of the first contact plate (31) and the second contact plate (32), and also includes a pull ring assembly, the pull ring assembly includes a stretching part (9) and a driven part (91) arranged below the stretching part (9), the lock (4) is arranged on the side of the driven part (91) facing away from the stretching part (9), and the side of the stretching part (9) in contact with the driven part (91) is provided with a hook member (92) for driving the driven part (91) to rotate so as to separate the lock (4) from the hook plate (41), and the driven part (91) has an extension plate (93) that abuts against the hook member (92). ;

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